{"id":11673,"date":"2025-12-23T12:52:18","date_gmt":"2025-12-23T04:52:18","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=11673"},"modified":"2026-06-25T15:35:03","modified_gmt":"2026-06-25T07:35:03","slug":"s7-tool-steel-heat-treatment","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/s7-tool-steel-heat-treatment\/","title":{"rendered":"Guia de tratamento t\u00e9rmico do a\u00e7o ferramenta S7: temperatura, dureza e processo"},"content":{"rendered":"<section class=\"aobo-s7-heat-treatment-page\">\n  <style>\n    .aobo-s7-heat-treatment-page {\n      --aobo-blue: #0c56d0;\n      --aobo-blue-dark: #073b8e;\n      --aobo-blue-soft: #eaf2ff;\n      --aobo-border: #d7e5fb;\n      --aobo-text: #203044;\n      --aobo-muted: #617087;\n      --aobo-orange: #f59b23;\n      --aobo-shadow: 0 18px 45px rgba(12, 86, 208, 0.10);\n      font-family: inherit;\n      color: var(--aobo-text);\n      line-height: 1.7;\n      background: transparent;\n      padding: 0;\n      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18px;\n        padding: 20px;\n      }\n\n      .aobo-supply-image {\n        width: min(190px, 100%);\n        margin: 0 auto;\n      }\n\n      .aobo-supply-image img {\n        width: 100%;\n      }\n\n      .aobo-supply-content {\n        padding: 0;\n      }\n\n      .aobo-final-cta {\n        padding: 28px 22px;\n      }\n    }\n  <\/style>\n\n  <div class=\"aobo-wrap\">\n    <header class=\"aobo-hero\">\n      <h1>Guia de Tratamento T\u00e9rmico de A\u00e7o para Ferramentas S7<\/h1>\n      <p>O a\u00e7o ferramenta S7 \u00e9 tipicamente tratado termicamente por pr\u00e9-aquecimento a 649\u2013677 \u00b0C (1200\u20131250 \u00b0F), austenitiza\u00e7\u00e3o a cerca de 940 \u00b0C (1725 \u00b0F), t\u00eampera ao ar para se\u00e7\u00f5es de at\u00e9 cerca de 63,5 mm (2,5 pol.) e aplica\u00e7\u00e3o imediata de revenido duplo. Para a maioria das ferramentas de trabalho a frio, o S7 \u00e9 comumente revenido a 204\u2013260 \u00b0C (400\u2013500 \u00b0F), produzindo uma dureza de trabalho t\u00edpica de cerca de 56\u201358 HRC.<\/p>\n    <\/header>\n\n    <section class=\"aobo-supply-block\">\n      <div class=\"aobo-supply-image\">\n        <img decoding=\"async\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/S7.webp\" alt=\"Barras de a\u00e7o ferramenta S7 fornecidas pela Aobo Steel.\" loading=\"lazy\">\n      <\/div>\n      <div class=\"aobo-supply-content\">\n        <p>A Aobo Steel fornece a\u00e7o ferramenta S7 recozido, pronto para usinagem e tratamento t\u00e9rmico interno. Consulte os tamanhos e o estoque dispon\u00edveis ou envie sua solicita\u00e7\u00e3o para um or\u00e7amento.<\/p>\n        <div class=\"aobo-supply-actions\">\n          <a class=\"aobo-btn aobo-btn-primary popmake-16052\" href=\"javascript:void(0);\">Enviar consulta<\/a>\n          <a class=\"aobo-btn aobo-btn-secondary\" href=\"https:\/\/aobosteel.com\/pt\/s7-tool-steel\/\">Veja os detalhes de fornecimento do S7<\/a>\n        <\/div>\n      <\/div>\n    <\/section>\n\n    <main class=\"aobo-article\">\n      <h2>Guia r\u00e1pido de tratamento t\u00e9rmico do a\u00e7o ferramenta S7<\/h2>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead><tr><th>Fase do Processo<\/th><th>Temperatura<\/th><th>Tempo de imers\u00e3o<\/th><th>M\u00e9todo de resfriamento<\/th><\/tr><\/thead>\n          <tbody>\n            <tr><td>Recozimento<\/td><td>815\u2013870 \u00b0C<\/td><td>1\u20131,5 h\/pol.<\/td><td>O forno esfria at\u00e9 482 \u00b0C e, em seguida, resfria ao ar.<\/td><\/tr>\n            <tr><td>Al\u00edvio do estresse<\/td><td>649\u2013677 \u00b0C<\/td><td>1\u20132 horas\/em<\/td><td>Forno frio preferencial<\/td><\/tr>\n            <tr><td>Pr\u00e9-aquecimento<\/td><td>649\u2013704 \u00b0C<\/td><td>At\u00e9 uniforme<\/td><td>-<\/td><\/tr>\n            <tr><td>Austenitiza\u00e7\u00e3o<\/td><td>940\u2013982 \u00b0C<\/td><td>Controlado pelo tamanho da se\u00e7\u00e3o<\/td><td>Ar ou \u00f3leo, dependendo do tamanho da se\u00e7\u00e3o.<\/td><\/tr>\n            <tr><td>Resfriamento<\/td><td>-<\/td><td>-<\/td><td>Ar \u226463,5 mm; \u00f3leo ou \u00f3leo de flash &gt;63,5 mm<\/td><\/tr>\n            <tr><td>T\u00eampera<\/td><td>204\u2013538 \u00b0C<\/td><td>2 horas\/in, duas vezes<\/td><td>Resfriamento por ar entre os ciclos<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>A dimens\u00e3o da se\u00e7\u00e3o transversal influencia significativamente o m\u00e9todo de t\u00eampera e a dureza final. Se\u00e7\u00f5es finas e m\u00e9dias normalmente atingem a dureza m\u00e1xima por resfriamento ao ar, enquanto se\u00e7\u00f5es mais espessas podem exigir um resfriamento mais r\u00e1pido para evitar baixa dureza no n\u00facleo.<\/p>\n\n      <h2>Processo de tratamento t\u00e9rmico passo a passo para a\u00e7o ferramenta S7<\/h2>\n      <h3>1. Pr\u00e9-aquecimento<\/h3>\n      <p>Proteja o a\u00e7o ferramenta S7 da descarboneta\u00e7\u00e3o durante o aquecimento. Utilize um forno de atmosfera controlada, um forno a v\u00e1cuo, um banho de sal neutro ou uma folha de a\u00e7o inoxid\u00e1vel selada.<\/p>\n      <p>Aque\u00e7a uniformemente a 649\u2013677 \u00b0C (1200\u20131250 \u00b0F) e mantenha nessa temperatura at\u00e9 que toda a se\u00e7\u00e3o transversal atinja a temperatura. Para se\u00e7\u00f5es pequenas, uma perman\u00eancia de 10 a 15 minutos ap\u00f3s a equaliza\u00e7\u00e3o da temperatura geralmente \u00e9 suficiente.<\/p>\n      <p>O pr\u00e9-aquecimento reduz o choque t\u00e9rmico, melhora a uniformidade da temperatura e diminui o risco de fissuras durante a subida final at\u00e9 a temperatura de austenitiza\u00e7\u00e3o.<\/p>\n\n      <h3>2. Austenitiza\u00e7\u00e3o<\/h3>\n      <p>Eleve a temperatura para cerca de 940 \u00b0C (1725 \u00b0F). A cronometragem deve come\u00e7ar somente depois que a pe\u00e7a atingir sua temperatura ideal.<\/p>\n      <p>O tempo de imers\u00e3o deve ser controlado cuidadosamente. Temperaturas ou tempos de imers\u00e3o excessivos podem causar o crescimento de gr\u00e3os, reten\u00e7\u00e3o de austenita, redu\u00e7\u00e3o da tenacidade e instabilidade dimensional.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead><tr><th>Espessura da se\u00e7\u00e3o<\/th><th>Tempo de imers\u00e3o recomendado<\/th><\/tr><\/thead>\n          <tbody>\n            <tr><td>1\/8 pol. \/ 3,2 mm<\/td><td>30 minutos<\/td><\/tr>\n            <tr><td>1\/4 pol. \/ 6,4 mm<\/td><td>40 minutos<\/td><\/tr>\n            <tr><td>1\/2 pol. \/ 12,7 mm<\/td><td>45\u201350 min<\/td><\/tr>\n            <tr><td>3\/4 pol. \/ 19 mm<\/td><td>50\u201355 min<\/td><\/tr>\n            <tr><td>\u22651 pol. \/ 25 mm<\/td><td>Aproximadamente 1 hora\/in<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n\n      <h3>3. T\u00eampera<\/h3>\n      <p>Para se\u00e7\u00f5es de at\u00e9 2,5 polegadas (aproximadamente 63,5 mm), utilize resfriamento com ar parado. Resfrie a pe\u00e7a a aproximadamente 150 \u00b0F (65 \u00b0C) antes do revenimento.<\/p>\n      <p>Para se\u00e7\u00f5es acima de 2,5 polegadas (6,35 cm), utilize um m\u00e9todo de resfriamento mais r\u00e1pido. Um resfriamento r\u00e1pido em \u00f3leo \u00e9 comumente usado: mergulhe e agite at\u00e9 que o calor vermelho vis\u00edvel desapare\u00e7a, depois retire a pe\u00e7a e deixe esfriar ao ar at\u00e9 cerca de 150 \u00b0F (65 \u00b0C).<\/p>\n      <p>O resfriamento a ar proporciona melhor controle dimensional, enquanto o resfriamento \u00e0 base de \u00f3leo ajuda se\u00e7\u00f5es maiores a atingirem dureza suficiente em toda a sua se\u00e7\u00e3o transversal.<\/p>\n\n      <h3>4. T\u00eampera<\/h3>\n      <p>Comece o processo de t\u00eampera imediatamente quando a pe\u00e7a esfriar at\u00e9 cerca de 65 \u00b0C (150 \u00b0F).<\/p>\n      <p>O a\u00e7o S7 requer t\u00eampera dupla. Cada ciclo de t\u00eampera deve durar 2 horas por polegada de espessura da se\u00e7\u00e3o, seguido de resfriamento completo ao ar at\u00e9 a temperatura ambiente antes do segundo ciclo.<\/p>\n      <p>Para a maioria das ferramentas de trabalho a frio, a t\u00eampera deve ser feita a 204\u2013260 \u00b0C (400\u2013500 \u00b0F). Isso normalmente produz uma dureza de trabalho em torno de 56\u201358 HRC.<\/p>\n      <p>Para trabalhos a quente ou aplica\u00e7\u00f5es em temperaturas elevadas, recomenda-se o tratamento t\u00e9rmico a 482\u2013538 \u00b0C (900\u20131000 \u00b0F) para melhorar a estabilidade t\u00e9rmica.<\/p>\n      <p>O revenimento a baixas temperaturas, abaixo de 400 \u00b0F (204 \u00b0C), pode aumentar a dureza, mas tamb\u00e9m aumenta o risco de fragilidade e n\u00e3o \u00e9 recomendado para aplica\u00e7\u00f5es industriais padr\u00e3o, a menos que a dureza m\u00e1xima seja a principal prioridade e qualquer perda de tenacidade seja aceit\u00e1vel.<\/p>\n\n      <h2>Recozimento e al\u00edvio de tens\u00f5es do a\u00e7o ferramenta S7<\/h2>\n      <h3>1. Recozimento<\/h3>\n      <p>O a\u00e7o ferramenta S7 \u00e9 normalmente fornecido no estado recozido. O recozimento geralmente \u00e9 necess\u00e1rio apenas para restaurar a usinabilidade ap\u00f3s o endurecimento ou para retrabalhar ferramentas.<\/p>\n      <p>O recozimento deve ser realizado em atmosfera controlada, forno a v\u00e1cuo ou ambiente de sal neutro para evitar a descarboneta\u00e7\u00e3o.<\/p>\n      <p>Pr\u00e1tica recomendada de recozimento:<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead><tr><th>Item<\/th><th>Recomenda\u00e7\u00e3o<\/th><\/tr><\/thead>\n          <tbody>\n            <tr><td>Temperatura<\/td><td>815\u2013870 \u00b0C, tipicamente em torno de 843 \u00b0C<\/td><\/tr>\n            <tr><td>Hora de relaxar<\/td><td>Aproximadamente 1,5 h\/in<\/td><\/tr>\n            <tr><td>Resfriamento<\/td><td>Resfriamento em forno a \u226414 \u00b0C\/h at\u00e9 482 \u00b0C, seguido de resfriamento ao ar.<\/td><\/tr>\n            <tr><td>Dureza final<\/td><td>Normalmente n\u00e3o ultrapassa cerca de 230 HB<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>O recozimento adequado melhora a usinabilidade e prepara o a\u00e7o para o endurecimento subsequente.<\/p>\n\n      <h3>2. Al\u00edvio do Estresse<\/h3>\n      <p>Recomenda-se o al\u00edvio de tens\u00f5es ap\u00f3s usinagem de desbaste pesado, eletroeros\u00e3o, soldagem ou ao trabalhar com geometrias complexas e se\u00e7\u00f5es irregulares.<\/p>\n      <p>N\u00e3o \u00e9 obrigat\u00f3rio para todas as pe\u00e7as, mas torna-se importante quando a tens\u00e3o residual pode causar distor\u00e7\u00e3o ou fissuras durante o endurecimento.<\/p>\n      <p>Pr\u00e1tica recomendada para aliviar o estresse:<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead><tr><th>Item<\/th><th>Recomenda\u00e7\u00e3o<\/th><\/tr><\/thead>\n          <tbody>\n            <tr><td>Temperatura<\/td><td>649\u2013677 \u00b0C<\/td><\/tr>\n            <tr><td>Hora de relaxar<\/td><td>1\u20132 horas\/em<\/td><\/tr>\n            <tr><td>Resfriamento<\/td><td>Resfriamento por forno preferencial<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>O resfriamento uniforme \u00e9 importante. O resfriamento desigual pode introduzir novas tens\u00f5es t\u00e9rmicas e reduzir o benef\u00edcio do al\u00edvio de tens\u00f5es.<\/p>\n\n      <h2>Dureza do a\u00e7o ferramenta S7 ap\u00f3s tratamento t\u00e9rmico<\/h2>\n      <p>A dureza final do a\u00e7o ferramenta S7 depende principalmente da temperatura de austenitiza\u00e7\u00e3o, do m\u00e9todo de t\u00eampera, da dimens\u00e3o da se\u00e7\u00e3o transversal e da temperatura de revenido. Como o S7 \u00e9 selecionado por sua resist\u00eancia ao choque, o tratamento t\u00e9rmico n\u00e3o deve se concentrar apenas na dureza m\u00e1xima. O objetivo pr\u00e1tico \u00e9 um equil\u00edbrio est\u00e1vel entre dureza Rockwell, tenacidade e resist\u00eancia \u00e0 fissura\u00e7\u00e3o.<\/p>\n      <p>Ap\u00f3s o endurecimento adequado, o a\u00e7o S7 pode atingir cerca de 58\u201364 HRC no estado bruto de t\u00eampera. No entanto, o S7 temperado \u00e9 muito quebradi\u00e7o para uso normal em ferramentas e deve ser revenido imediatamente ap\u00f3s a t\u00eampera. Para a maioria das ferramentas de trabalho a frio, a dureza de trabalho t\u00edpica ap\u00f3s o revenido \u00e9 de cerca de 56\u201358 HRC.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead><tr><th>Temperatura de t\u00eampera<\/th><th>Dureza aproximada<\/th><th>Significado pr\u00e1tico<\/th><\/tr><\/thead>\n          <tbody>\n            <tr><td>Ap\u00f3s a t\u00eampera, antes do revenimento.<\/td><td>58\u201364 HRC<\/td><td>Dureza m\u00e1xima, mas muito quebradi\u00e7o para uso em servi\u00e7o. Revenido imediatamente ap\u00f3s a t\u00eampera.<\/td><\/tr>\n            <tr><td>400\u2013500 \u00b0F \/ 204\u2013260 \u00b0C<\/td><td>56\u201358 HRC<\/td><td>Faixa de trabalho a frio comum para pun\u00e7\u00f5es, matrizes, l\u00e2minas de corte e ferramentas sujeitas a impactos.<\/td><\/tr>\n            <tr><td>Aproximadamente 450 \u00b0F \/ 230 \u00b0C<\/td><td>Aproximadamente 58 HRC<\/td><td>Gama pr\u00e1tica de uso geral, ideal para situa\u00e7\u00f5es que exigem resist\u00eancia ao desgaste e robustez ao impacto.<\/td><\/tr>\n            <tr><td>500\u2013900 \u00b0F \/ 260\u2013482 \u00b0C<\/td><td>Aproximadamente 54\u201356 HRC<\/td><td>Faixa de dureza est\u00e1vel com melhor tenacidade do que temperaturas de revenido mais baixas.<\/td><\/tr>\n            <tr><td>900\u20131000 \u00b0F \/ 482\u2013538 \u00b0C<\/td><td>Aproximadamente 48\u201352 HRC<\/td><td>Utilizado em aplica\u00e7\u00f5es de trabalho a quente ou em temperaturas elevadas, onde a estabilidade t\u00e9rmica \u00e9 mais importante do que a dureza m\u00e1xima.<\/td><\/tr>\n            <tr><td>1050\u20131150 \u00b0F \/ 565\u2013620 \u00b0C<\/td><td>Aproximadamente 45 HRC<\/td><td>Ampla faixa de t\u00eampera com amolecimento significativo. Utilizada somente quando uma dureza menor for aceit\u00e1vel.<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>Para aplica\u00e7\u00f5es de trabalho a frio, o a\u00e7o S7 \u00e9 geralmente temperado a 400\u2013500 \u00b0F (204\u2013260 \u00b0C) para atingir uma dureza de aproximadamente 56\u201358 HRC. Essa faixa de dureza \u00e9 adequada quando a ferramenta precisa resistir simultaneamente a impactos, lascamento e desgaste moderado.<\/p>\n      <p>Para trabalhos a quente ou servi\u00e7os em temperaturas elevadas, o a\u00e7o S7 geralmente \u00e9 temperado a 900\u20131000 \u00b0F (482\u2013538 \u00b0C). A dureza \u00e9 menor, mas o a\u00e7o \u00e9 mais adequado para aplica\u00e7\u00f5es onde a estabilidade t\u00e9rmica e a resist\u00eancia ao amolecimento s\u00e3o mais importantes do que a dureza Rockwell m\u00e1xima.<\/p>\n      <p>O revenimento abaixo de 400 \u00b0F (204 \u00b0C) geralmente n\u00e3o \u00e9 recomendado para ferramentas industriais padr\u00e3o. Embora possa manter uma dureza maior, tamb\u00e9m aumenta o risco de fragilidade e fissuras. As ferramentas S7 devem ser submetidas a um revenimento duplo, com resfriamento completo \u00e0 temperatura ambiente entre os ciclos de revenimento, para reduzir as tens\u00f5es internas e melhorar a confiabilidade da dureza final.<\/p>\n      <p>A dureza correta deve sempre ser selecionada de acordo com o modo de falha da ferramenta. Se o desgaste for o principal problema, uma faixa de t\u00eampera mais baixa pode ser adequada. Se o principal problema for trincas, lascas ou falhas por impacto, uma dureza ligeiramente menor com melhor tenacidade geralmente \u00e9 mais segura do que buscar a dureza m\u00e1xima.<\/p>\n\n      <h2>Tratamento t\u00e9rmico do a\u00e7o ferramenta S7 por aplica\u00e7\u00e3o<\/h2>\n      <p>O tratamento t\u00e9rmico S7 deve ser ajustado de acordo com as condi\u00e7\u00f5es de trabalho da ferramenta. A principal vari\u00e1vel costuma ser a temperatura de revenimento.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead><tr><th>Aplicativo<\/th><th>Faixa de t\u00eampera<\/th><th>Dureza t\u00edpica<\/th><th>Prioridade principal<\/th><\/tr><\/thead>\n          <tbody>\n            <tr><td>Ferramentas para trabalho a frio, matrizes, pun\u00e7\u00f5es, l\u00e2minas de corte<\/td><td>400\u2013500 \u00b0F \/ 204\u2013260 \u00b0C<\/td><td>56\u201358 HRC<\/td><td>equil\u00edbrio entre desgaste e resist\u00eancia<\/td><\/tr>\n            <tr><td>Ferramentas para trabalho a frio com foco em m\u00e1xima dureza<\/td><td>345\u2013400 \u00b0F \/ 175\u2013204 \u00b0C<\/td><td>Maior dureza<\/td><td>M\u00e1xima resist\u00eancia ao desgaste, menor tenacidade<\/td><\/tr>\n            <tr><td>Ferramentas para trabalho a quente ou moldagem de pl\u00e1stico<\/td><td>900\u20131000 \u00b0F \/ 482\u2013538 \u00b0C<\/td><td>48\u201352 HRC<\/td><td>estabilidade t\u00e9rmica<\/td><\/tr>\n            <tr><td>Ferramentas com predomin\u00e2ncia de choque<\/td><td>700\u2013750 \u00b0F \/ 370\u2013400 \u00b0C<\/td><td>dureza moderada<\/td><td>Resist\u00eancia \u00e0 fratura<\/td><\/tr>\n            <tr><td>Equil\u00edbrio entre for\u00e7a e resist\u00eancia<\/td><td>Aproximadamente 575 \u00b0F \/ 300 \u00b0C<\/td><td>dureza controlada<\/td><td>Equil\u00edbrio entre resist\u00eancia ao escoamento e impacto<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>Para aplica\u00e7\u00f5es padr\u00e3o de trabalho a frio, 450 \u00b0F (cerca de 230 \u00b0C) \u00e9 comumente usado para obter dureza est\u00e1vel e boa resist\u00eancia ao impacto.<\/p>\n      <p>Para aplica\u00e7\u00f5es em altas temperaturas, a temperatura de t\u00eampera deve ser, normalmente, pelo menos 25 a 50 \u00b0F acima da temperatura de servi\u00e7o esperada. Isso ajuda a evitar o amolecimento durante o uso.<\/p>\n      <p>Para ferramentas sujeitas a impactos, temperaturas de revenimento mais elevadas s\u00e3o geralmente mais adequadas, pois a tenacidade e a resist\u00eancia \u00e0 fratura s\u00e3o mais importantes do que a dureza m\u00e1xima.<\/p>\n\n      <h2>Sele\u00e7\u00e3o do m\u00e9todo de t\u00eampera do a\u00e7o ferramenta S7<\/h2>\n      <p>O m\u00e9todo de t\u00eampera correto depende principalmente do tamanho da se\u00e7\u00e3o transversal, da geometria e da sensibilidade \u00e0 distor\u00e7\u00e3o.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead><tr><th>Condi\u00e7\u00e3o<\/th><th>M\u00e9todo<\/th><th>Processo chave<\/th><th>Nota cr\u00edtica<\/th><\/tr><\/thead>\n          <tbody>\n            <tr><td>Sec\u00e7\u00f5es \u226463,5 mm<\/td><td>Resfriamento por ar<\/td><td>Resfrie em local com pouca ventila\u00e7\u00e3o ap\u00f3s a austenitiza\u00e7\u00e3o.<\/td><td>Melhor estabilidade dimensional<\/td><\/tr>\n            <tr><td>Sec\u00e7\u00f5es &gt;63,5 mm<\/td><td>Refrigera\u00e7\u00e3o \u00e0 base de \u00f3leo<\/td><td>Use um resfriamento mais r\u00e1pido para melhorar a dureza do n\u00facleo.<\/td><td>O resfriamento a ar pode ser insuficiente.<\/td><\/tr>\n            <tr><td>Se\u00e7\u00f5es pesadas que exigem controle de tens\u00e3o<\/td><td>t\u00eampera instant\u00e2nea em \u00f3leo<\/td><td>Resfrie em \u00f3leo at\u00e9 que o calor incandescente desapare\u00e7a e, em seguida, deixe esfriar ao ar.<\/td><td>N\u00e3o utilize folha de a\u00e7o inoxid\u00e1vel.<\/td><\/tr>\n            <tr><td>Pe\u00e7as complexas ou sens\u00edveis \u00e0 distor\u00e7\u00e3o<\/td><td>Martemperagem<\/td><td>Banho de sal a 595\u2013650 \u00b0C, equalizar a temperatura e, em seguida, resfriar ao ar.<\/td><td>Reduz os gradientes t\u00e9rmicos<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>Para muitas ferramentas S7, o resfriamento ao ar \u00e9 prefer\u00edvel por reduzir o risco de distor\u00e7\u00e3o. No entanto, para se\u00e7\u00f5es grandes, o resfriamento ao ar por si s\u00f3 pode n\u00e3o fornecer taxa de resfriamento suficiente para atingir a dureza total.<\/p>\n      <figure class=\"aobo-figure\">\n        <img decoding=\"async\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/06\/S7-IT.avif\" alt=\"Tabela de tratamento t\u00e9rmico do a\u00e7o ferramenta S7 do Guia do Tratador T\u00e9rmico\" loading=\"lazy\">\n        <figcaption>Fonte: Guia do Tratador T\u00e9rmico: Pr\u00e1ticas e Procedimentos para Ferros e A\u00e7os, ASM International, 1995, p. 532.<\/figcaption>\n      <\/figure>\n\n      <h2>Problemas comuns no tratamento t\u00e9rmico do a\u00e7o ferramenta S7<\/h2>\n      <p>A maioria das falhas no tratamento t\u00e9rmico S7 est\u00e1 relacionada ao controle da atmosfera, dimens\u00f5es da se\u00e7\u00e3o transversal, tens\u00f5es residuais, temperaturas excessivas ou revenimento tardio.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead><tr><th>Problema<\/th><th>Causa raiz<\/th><th>A\u00e7\u00e3o Corretiva<\/th><\/tr><\/thead>\n          <tbody>\n            <tr><td>Descarboneta\u00e7\u00e3o<\/td><td>Perda de carbono superficial em uma atmosfera oxidante<\/td><td>Utilize v\u00e1cuo, atmosfera controlada, sal neutro ou papel alum\u00ednio selado.<\/td><\/tr>\n            <tr><td>Distor\u00e7\u00e3o ou fissura\u00e7\u00e3o t\u00e9rmica<\/td><td>Gradientes t\u00e9rmicos, geometria acentuada ou tens\u00e3o de usinagem<\/td><td>Pr\u00e9-aque\u00e7a adequadamente, alivie as tens\u00f5es antes do endurecimento e evite cantos vivos.<\/td><\/tr>\n            <tr><td>Baixa dureza em grandes se\u00e7\u00f5es<\/td><td>A taxa de resfriamento est\u00e1 muito lenta nessa se\u00e7\u00e3o.<\/td><td>Utilize refrigera\u00e7\u00e3o \u00e0 base de \u00f3leo ou t\u00eampera instant\u00e2nea em \u00f3leo para se\u00e7\u00f5es mais espessas.<\/td><\/tr>\n            <tr><td>Superaquecimento ou austenita retida<\/td><td>Temperatura de austenitiza\u00e7\u00e3o ou tempo de perman\u00eancia excessivos<\/td><td>Controle rigorosamente a temperatura e o tempo de imers\u00e3o.<\/td><\/tr>\n            <tr><td>Rachaduras ap\u00f3s t\u00eampera<\/td><td>Temperamento tardio ou estresse interno excessivo<\/td><td>Tempere imediatamente e aplique t\u00eampera dupla.<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>A descarboneta\u00e7\u00e3o cria uma camada superficial macia que n\u00e3o consegue endurecer completamente, reduzindo assim a resist\u00eancia ao desgaste. O superaquecimento aumenta o risco de austenita retida, crescimento de gr\u00e3os, instabilidade dimensional e menor tenacidade. O revenido retardado \u00e9 especialmente perigoso porque a estrutura ap\u00f3s a t\u00eampera apresenta alta tens\u00e3o interna.<\/p>\n\n      <div class=\"aobo-note-box\">\n        <p>Nota: N\u00e3o oferecemos servi\u00e7os de tratamento t\u00e9rmico para o a\u00e7o S7. A Aobo Steel fornece a\u00e7o ferramenta S7 no estado recozido, e este guia \u00e9 fornecido como refer\u00eancia t\u00e9cnica para auxiliar nossos clientes em suas decis\u00f5es de processamento e aplica\u00e7\u00e3o.<\/p>\n      <\/div>\n    <\/main>\n\n    <section class=\"aobo-final-cta\">\n      <div>\n        <h2>Precisa de a\u00e7o ferramenta S7 para ferramentas resistentes a choques?<\/h2>\n        <p>A Aobo Steel fornece a\u00e7o ferramenta S7 recozido para aplica\u00e7\u00f5es em ferramentas industriais. Envie-nos as dimens\u00f5es, a quantidade, a toler\u00e2ncia e a aplica\u00e7\u00e3o desejadas para receber um or\u00e7amento.<\/p>\n      <\/div>\n      <a class=\"aobo-btn popmake-16052\" href=\"javascript:void(0);\">Enviar consulta<\/a>\n    <\/section>\n  <\/div>\n<\/section>\n\n\n\n<ul class=\"wp-block-yoast-seo-related-links yoast-seo-related-links\">\n<li><a href=\"https:\/\/aobosteel.com\/pt\/s7-tool-steel\/\">Fornecedor de a\u00e7o ferramenta AISI S7 | DIN 1.2355 | A\u00e7o ferramenta resistente a impactos a granel<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/pt\/420-stainless-steel-heat-treatment\/\">Guia de Tratamento T\u00e9rmico do A\u00e7o 420 | Endurecimento, T\u00eampera e Revenimento<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/pt\/h13-steel-hardness\/\">Dureza do a\u00e7o H13: Faixa HRC, tabela de revenimento e aplica\u00e7\u00f5es<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/pt\/h11-tool-steel-heat-treatment\/\">Guia de Tratamento T\u00e9rmico do A\u00e7o Ferramenta H11<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/pt\/blog\/is-a2-tool-steel-wear-resistant\/\">O a\u00e7o ferramenta A2 \u00e9 resistente ao desgaste? Dureza, usos e compara\u00e7\u00e3o.<\/a><\/li>\n<\/ul>\n\n\n\n<h2 id=\"h-faq\" class=\"wp-block-heading\">Perguntas frequentes<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1777338846448\"><strong class=\"schema-faq-question\">Qual \u00e9 a dureza recomendada para o a\u00e7o ferramenta S7?<\/strong> <p class=\"schema-faq-answer\">Para a maioria das aplica\u00e7\u00f5es industriais, o a\u00e7o ferramenta S7 \u00e9 normalmente usado com dureza de 56\u201358 HRC.<br>Menor dureza (48\u201352 HRC): melhor tenacidade, utilizada em ferramentas para trabalhos a quente ou sujeitas a impactos.<br>Maior dureza (acima de 58 HRC): melhor resist\u00eancia ao desgaste, mas maior fragilidade.<br>A dureza correta depende se a falha foi causada por desgaste ou impacto.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1777338878733\"><strong class=\"schema-faq-question\">O a\u00e7o ferramenta S7 requer t\u00eampera em \u00f3leo?<\/strong> <p class=\"schema-faq-answer\">Nem sempre.<br>O a\u00e7o S7 \u00e9 um a\u00e7o de endurecimento ao ar, e a t\u00eampera ao ar \u00e9 suficiente para se\u00e7\u00f5es de at\u00e9 aproximadamente 63,5 mm (2,5 polegadas).<br>No entanto:<br>Em se\u00e7\u00f5es mais espessas, o resfriamento a ar pode n\u00e3o atingir a dureza total.<br>O resfriamento em \u00f3leo ou o resfriamento r\u00e1pido em \u00f3leo s\u00e3o necess\u00e1rios para garantir o endurecimento adequado.<br>O m\u00e9todo de t\u00eampera deve sempre ser selecionado com base na dimens\u00e3o da se\u00e7\u00e3o transversal.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1777338879534\"><strong class=\"schema-faq-question\">Por que o a\u00e7o S7 requer t\u00eampera dupla?<\/strong> <p class=\"schema-faq-answer\">\u00c9 necess\u00e1rio um processo de t\u00eampera dupla para:<br>Reduzir a tens\u00e3o interna ap\u00f3s o resfriamento r\u00e1pido<br>Estabilizar a estrutura martens\u00edtica<br>Melhora a resist\u00eancia e reduz o risco de fissuras.<br>A t\u00eampera simples n\u00e3o \u00e9 suficiente para o padr\u00e3o S7 e pode levar a um desempenho inst\u00e1vel em servi\u00e7o.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1777338880237\"><strong class=\"schema-faq-question\">O a\u00e7o S7 pode ser temperado abaixo de 400\u00b0F?<\/strong> <p class=\"schema-faq-answer\">Sim, mas geralmente n\u00e3o \u00e9 recomendado para uso industrial padr\u00e3o.<br>O revenimento a 345\u2013400\u00b0F pode aumentar a dureza.<br>No entanto, isso reduz significativamente a resist\u00eancia e aumenta o risco de fissuras.<br>Este processo de t\u00eampera a baixa temperatura deve ser utilizado apenas quando se exige m\u00e1xima resist\u00eancia ao desgaste e a carga de impacto \u00e9 m\u00ednima.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1777338880956\"><strong class=\"schema-faq-question\">O que acontece se o a\u00e7o S7 n\u00e3o for temperado imediatamente ap\u00f3s o resfriamento brusco?<\/strong> <p class=\"schema-faq-answer\">O atraso na t\u00eampera pode levar a:<br>Alto estresse residual<br>Risco aumentado de rachaduras<br>Resist\u00eancia reduzida<br>O a\u00e7o S7 deve ser revenido assim que esfriar at\u00e9 cerca de 65\u00b0C (150\u00b0F) ap\u00f3s a t\u00eampera.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1777338918053\"><strong class=\"schema-faq-question\">Qual \u00e9 a melhor temperatura de revenimento para o a\u00e7o ferramenta S7?<\/strong> <p class=\"schema-faq-answer\">A faixa de temperatura mais comumente utilizada \u00e9 de 204 a 260 \u00b0C (400 a 500 \u00b0F) para aplica\u00e7\u00f5es de trabalho a frio.<br>Pr\u00e1tica t\u00edpica: Cerca de 230 \u00b0C (450 \u00b0F) proporciona um equil\u00edbrio est\u00e1vel entre dureza e tenacidade.<br>Para aplica\u00e7\u00f5es de trabalho a quente: Utilize 900\u20131000\u00b0F (482\u2013538\u00b0C)<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1777338981206\"><strong class=\"schema-faq-question\">Por que o a\u00e7o S7 perde dureza em altas temperaturas de revenimento?<\/strong> <p class=\"schema-faq-answer\">Em temperaturas de t\u00eampera mais elevadas (acima de ~1000\u00b0F \/ 538\u00b0C):<br>aumento do crescimento do carboneto<br>A estrutura martens\u00edtica amolece<br>A dureza diminui mais rapidamente.<br>\u00c9 por isso que o revenimento em alta temperatura \u00e9 usado apenas quando a tenacidade e a estabilidade t\u00e9rmica s\u00e3o mais importantes do que a dureza.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1777338981928\"><strong class=\"schema-faq-question\">Como evitar a descarboneta\u00e7\u00e3o durante o tratamento t\u00e9rmico S7?<\/strong> <p class=\"schema-faq-answer\">A descarboneta\u00e7\u00e3o ocorre quando a superf\u00edcie perde carbono durante o aquecimento. Para evit\u00e1-la:<br>Utilize um forno a v\u00e1cuo ou uma atmosfera controlada.<br>Use um banho de sal neutro.<br>Envolva as pe\u00e7as em folha de a\u00e7o inoxid\u00e1vel.<br>Caso ocorra descarboneta\u00e7\u00e3o, a superf\u00edcie afetada deve ser removida por usinagem ou retifica\u00e7\u00e3o.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1777338982702\"><strong class=\"schema-faq-question\">Por que o S7 apresenta baixa dureza em grandes se\u00e7\u00f5es?<\/strong> <p class=\"schema-faq-answer\">Isso geralmente \u00e9 causado por uma taxa de resfriamento insuficiente.<br>O resfriamento a ar pode ser muito lento para se\u00e7\u00f5es espessas.<br>O n\u00facleo n\u00e3o se transforma completamente em martensita.<br>Solu\u00e7\u00e3o: Utilize t\u00eampera em \u00f3leo ou t\u00eampera instant\u00e2nea em \u00f3leo para se\u00e7\u00f5es acima de 63,5 mm.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1777339040357\"><strong class=\"schema-faq-question\">O S7 \u00e9 adequado para aplica\u00e7\u00f5es em altas temperaturas?<\/strong> <p class=\"schema-faq-answer\">O a\u00e7o S7 pode ser usado em temperaturas moderadamente elevadas, mas n\u00e3o \u00e9 um a\u00e7o espec\u00edfico para trabalho a quente.<br>Para exposi\u00e7\u00e3o ocasional ou moderada ao calor: aceit\u00e1vel<br>Para servi\u00e7o cont\u00ednuo em altas temperaturas: \u00e9 melhor usar a\u00e7os da s\u00e9rie H.<br>A temperatura de t\u00eampera deve ser sempre superior \u00e0 temperatura de servi\u00e7o para evitar o amolecimento durante o uso.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1777339041395\"><strong class=\"schema-faq-question\">Qual \u00e9 o maior erro no tratamento t\u00e9rmico S7?<\/strong> <p class=\"schema-faq-answer\">Os erros mais comuns s\u00e3o:<br>N\u00e3o temperar imediatamente ap\u00f3s a t\u00eampera.<br>Utilizando t\u00eampera a ar para se\u00e7\u00f5es muito espessas.<br>Superaquecimento durante a austenitiza\u00e7\u00e3o<br>Ignorar o al\u00edvio do estresse antes do endurecimento<br>Dentre esses, o revenimento tardio e os m\u00e9todos incorretos de t\u00eampera s\u00e3o os que causam a maioria das falhas.<\/p> <\/div> <\/div>","protected":false},"excerpt":{"rendered":"<p>S7 Tool Steel Heat Treatment Guide S7 tool steel is typically heat-treated by preheating to 1200\u20131250\u00b0F (649\u2013677\u00b0C), austenitizing at about 1725\u00b0F (940\u00b0C), air quenching for sections up to about 2.5 in. (63.5 mm), and applying immediate double tempering. For most cold-work tooling, S7 is commonly tempered at 400\u2013500\u00b0F (204\u2013260\u00b0C), producing a typical working hardness of [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":15089,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"normal-width-container","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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is the recommended hardness for S7 tool steel?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"For most industrial applications, S7 tool steel is typically used at 56\u201358 HRC.<br>Lower hardness (48\u201352 HRC): better toughness, used for hot-work or impact-heavy tools<br>Higher hardness (above 58 HRC): improved wear resistance but increased brittleness<br>The correct hardness depends on whether failure is caused by wear or impact.\",\"inLanguage\":\"pt-BR\"},\"inLanguage\":\"pt-BR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/s7-tool-steel-heat-treatment\\\/#faq-question-1777338878733\",\"position\":2,\"url\":\"https:\\\/\\\/aobosteel.com\\\/s7-tool-steel-heat-treatment\\\/#faq-question-1777338878733\",\"name\":\"Does S7 tool steel require oil quenching?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Not always.<br>S7 is an air-hardening steel, and air quenching is sufficient for sections up to about 63.5 mm 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service.\",\"inLanguage\":\"pt-BR\"},\"inLanguage\":\"pt-BR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/s7-tool-steel-heat-treatment\\\/#faq-question-1777338880237\",\"position\":4,\"url\":\"https:\\\/\\\/aobosteel.com\\\/s7-tool-steel-heat-treatment\\\/#faq-question-1777338880237\",\"name\":\"Can S7 be tempered below 400\u00b0F?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, but it is generally not recommended for standard industrial use.<br>Tempering at 345\u2013400\u00b0F can increase hardness<br>However, it significantly reduces toughness and increases cracking risk<br>This low-temperature tempering should be used only when maximum wear resistance is required, and impact loading is 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temperature for S7 tool steel?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The most commonly used range is: 400\u2013500\u00b0F (204\u2013260\u00b0C) for cold-work applications<br>Typical practice: Around 450\u00b0F (230\u00b0C) gives a stable balance of hardness and toughness<br>For hot-work applications: Use 900\u20131000\u00b0F (482\u2013538\u00b0C)\",\"inLanguage\":\"pt-BR\"},\"inLanguage\":\"pt-BR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/s7-tool-steel-heat-treatment\\\/#faq-question-1777338981206\",\"position\":7,\"url\":\"https:\\\/\\\/aobosteel.com\\\/s7-tool-steel-heat-treatment\\\/#faq-question-1777338981206\",\"name\":\"Why does S7 lose hardness at high tempering temperatures?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"At higher tempering temperatures (above ~1000\u00b0F \\\/ 538\u00b0C):<br>Carbide coarsening increases<br>Martensite structure softens<br>Hardness drops more rapidly<br>This is why high-temperature tempering is used only when toughness and thermal stability are more important than hardness.\",\"inLanguage\":\"pt-BR\"},\"inLanguage\":\"pt-BR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/s7-tool-steel-heat-treatment\\\/#faq-question-1777338981928\",\"position\":8,\"url\":\"https:\\\/\\\/aobosteel.com\\\/s7-tool-steel-heat-treatment\\\/#faq-question-1777338981928\",\"name\":\"How do you prevent decarburization during S7 heat treatment?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Decarburization occurs when the surface loses carbon during heating. 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\u00e9 a dureza recomendada para o a\u00e7o ferramenta S7?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"For most industrial applications, S7 tool steel is typically used at 56\u201358 HRC.<br>Lower hardness (48\u201352 HRC): better toughness, used for hot-work or impact-heavy tools<br>Higher hardness (above 58 HRC): improved wear resistance but increased brittleness<br>The correct hardness depends on whether failure is caused by wear or impact.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/s7-tool-steel-heat-treatment\/#faq-question-1777338878733","position":2,"url":"https:\/\/aobosteel.com\/s7-tool-steel-heat-treatment\/#faq-question-1777338878733","name":"O a\u00e7o ferramenta S7 requer t\u00eampera em \u00f3leo?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Not always.<br>S7 is an air-hardening steel, and air quenching is sufficient for sections up to about 63.5 mm (2.5 inches).<br>However:<br>For thicker sections, air cooling may not achieve full hardness<br>Oil quenching or flash oil quenching is required to ensure proper hardening<br>The quenching method should always be selected based on section size.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/s7-tool-steel-heat-treatment\/#faq-question-1777338879534","position":3,"url":"https:\/\/aobosteel.com\/s7-tool-steel-heat-treatment\/#faq-question-1777338879534","name":"Por que o a\u00e7o S7 requer t\u00eampera dupla?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Double tempering is required to:<br>Reduce internal stress after quenching<br>Stabilize the martensitic structure<br>Improve toughness and reduce cracking risk<br>Single tempering is not sufficient for S7 and may lead to unstable performance in service.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/s7-tool-steel-heat-treatment\/#faq-question-1777338880237","position":4,"url":"https:\/\/aobosteel.com\/s7-tool-steel-heat-treatment\/#faq-question-1777338880237","name":"O a\u00e7o S7 pode ser temperado abaixo de 400\u00b0F?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Yes, but it is generally not recommended for standard industrial use.<br>Tempering at 345\u2013400\u00b0F can increase hardness<br>However, it significantly reduces toughness and increases cracking risk<br>This low-temperature tempering should be used only when maximum wear resistance is required, and impact loading is minimal.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/s7-tool-steel-heat-treatment\/#faq-question-1777338880956","position":5,"url":"https:\/\/aobosteel.com\/s7-tool-steel-heat-treatment\/#faq-question-1777338880956","name":"O que acontece se o a\u00e7o S7 n\u00e3o for temperado imediatamente ap\u00f3s o resfriamento brusco?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Delayed tempering can lead to:<br>High residual stress<br>Increased risk of cracking<br>Reduced toughness<br>S7 should be tempered as soon as it cools to about 65\u00b0C (150\u00b0F) after quenching.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/s7-tool-steel-heat-treatment\/#faq-question-1777338918053","position":6,"url":"https:\/\/aobosteel.com\/s7-tool-steel-heat-treatment\/#faq-question-1777338918053","name":"Qual \u00e9 a melhor temperatura de revenimento para o a\u00e7o ferramenta S7?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"The most commonly used range is: 400\u2013500\u00b0F (204\u2013260\u00b0C) for cold-work applications<br>Typical practice: Around 450\u00b0F (230\u00b0C) gives a stable balance of hardness and toughness<br>For hot-work applications: Use 900\u20131000\u00b0F (482\u2013538\u00b0C)","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/s7-tool-steel-heat-treatment\/#faq-question-1777338981206","position":7,"url":"https:\/\/aobosteel.com\/s7-tool-steel-heat-treatment\/#faq-question-1777338981206","name":"Por que o a\u00e7o S7 perde dureza em altas temperaturas de revenimento?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"At higher tempering temperatures (above ~1000\u00b0F \/ 538\u00b0C):<br>Carbide coarsening increases<br>Martensite structure softens<br>Hardness drops more rapidly<br>This is why high-temperature tempering is used only when toughness and thermal stability are more important than hardness.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/s7-tool-steel-heat-treatment\/#faq-question-1777338981928","position":8,"url":"https:\/\/aobosteel.com\/s7-tool-steel-heat-treatment\/#faq-question-1777338981928","name":"Como evitar a descarboneta\u00e7\u00e3o durante o tratamento t\u00e9rmico S7?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Decarburization occurs when the surface loses carbon during heating. To prevent it:<br>Use a vacuum furnace or a controlled atmosphere<br>Use a neutral salt bath<br>Wrap parts in stainless steel foil<br>If decarburization occurs, the affected surface must be removed by machining or grinding.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/s7-tool-steel-heat-treatment\/#faq-question-1777338982702","position":9,"url":"https:\/\/aobosteel.com\/s7-tool-steel-heat-treatment\/#faq-question-1777338982702","name":"Por que o S7 apresenta baixa dureza em grandes se\u00e7\u00f5es?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"This is usually caused by an insufficient cooling rate.<br>Air cooling may be too slow for thick sections<br>The core does not fully transform to martensite<br>Solution: Use oil quenching or flash oil quenching for sections above 63.5 mm","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/s7-tool-steel-heat-treatment\/#faq-question-1777339040357","position":10,"url":"https:\/\/aobosteel.com\/s7-tool-steel-heat-treatment\/#faq-question-1777339040357","name":"O S7 \u00e9 adequado para aplica\u00e7\u00f5es em altas temperaturas?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"S7 can be used at moderately elevated temperatures, but it is not a dedicated hot-work steel.<br>For occasional or moderate heat exposure: acceptable<br>For continuous high-temperature service: better to use H-series steels<br>The tempering temperature should always be higher than the service temperature to avoid softening during use.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/s7-tool-steel-heat-treatment\/#faq-question-1777339041395","position":11,"url":"https:\/\/aobosteel.com\/s7-tool-steel-heat-treatment\/#faq-question-1777339041395","name":"Qual \u00e9 o maior erro no tratamento t\u00e9rmico S7?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"The most common mistakes are:<br>Not tempering immediately after quenching<br>Using air quenching for sections that are too thick<br>Overheating during austenitizing<br>Ignoring stress relief before hardening<br>Among these, delayed tempering and incorrect quenching methods cause the most failures.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"}]}},"uagb_featured_image_src":{"full":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/S7-Tool-Steel-Heat-Treatment-Guide-ad.avif",1254,1254,false],"thumbnail":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/S7-Tool-Steel-Heat-Treatment-Guide-ad-150x150.avif",150,150,true],"medium":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/S7-Tool-Steel-Heat-Treatment-Guide-ad-300x300.avif",300,300,true],"medium_large":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/S7-Tool-Steel-Heat-Treatment-Guide-ad-768x768.avif",768,768,true],"large":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/S7-Tool-Steel-Heat-Treatment-Guide-ad-1024x1024.avif",1024,1024,true],"1536x1536":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/S7-Tool-Steel-Heat-Treatment-Guide-ad.avif",1254,1254,false],"2048x2048":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/S7-Tool-Steel-Heat-Treatment-Guide-ad.avif",1254,1254,false],"trp-custom-language-flag":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/S7-Tool-Steel-Heat-Treatment-Guide-ad-12x12.avif",12,12,true]},"uagb_author_info":{"display_name":"Evan","author_link":"https:\/\/aobosteel.com\/pt\/blog\/author\/admin\/"},"uagb_comment_info":0,"uagb_excerpt":"S7 Tool Steel Heat Treatment Guide S7 tool steel is typically heat-treated by preheating to 1200\u20131250\u00b0F (649\u2013677\u00b0C), austenitizing at about 1725\u00b0F (940\u00b0C), air quenching for sections up to about 2.5 in. (63.5 mm), and applying immediate double tempering. For most cold-work tooling, S7 is commonly tempered at 400\u2013500\u00b0F (204\u2013260\u00b0C), producing a typical working hardness of&hellip;","rttpg_featured_image_url":{"full":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/S7-Tool-Steel-Heat-Treatment-Guide-ad.avif",1254,1254,false],"landscape":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/S7-Tool-Steel-Heat-Treatment-Guide-ad.avif",1254,1254,false],"portraits":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/S7-Tool-Steel-Heat-Treatment-Guide-ad.avif",1254,1254,false],"thumbnail":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/S7-Tool-Steel-Heat-Treatment-Guide-ad-150x150.avif",150,150,true],"medium":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/S7-Tool-Steel-Heat-Treatment-Guide-ad-300x300.avif",300,300,true],"large":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/S7-Tool-Steel-Heat-Treatment-Guide-ad-1024x1024.avif",1024,1024,true],"1536x1536":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/S7-Tool-Steel-Heat-Treatment-Guide-ad.avif",1254,1254,false],"2048x2048":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/S7-Tool-Steel-Heat-Treatment-Guide-ad.avif",1254,1254,false],"trp-custom-language-flag":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/S7-Tool-Steel-Heat-Treatment-Guide-ad-12x12.avif",12,12,true]},"rttpg_author":{"display_name":"Evan","author_link":"https:\/\/aobosteel.com\/pt\/blog\/author\/admin\/"},"rttpg_comment":0,"rttpg_category":null,"rttpg_excerpt":"S7 Tool Steel Heat Treatment Guide S7 tool steel is typically heat-treated by preheating to 1200\u20131250\u00b0F (649\u2013677\u00b0C), austenitizing at about 1725\u00b0F (940\u00b0C), air quenching for sections up to about 2.5 in. (63.5 mm), and applying immediate double tempering. For most cold-work tooling, S7 is commonly tempered at 400\u2013500\u00b0F (204\u2013260\u00b0C), producing a typical working hardness of&hellip;","_links":{"self":[{"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/pages\/11673","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/comments?post=11673"}],"version-history":[{"count":1,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/pages\/11673\/revisions"}],"predecessor-version":[{"id":16167,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/pages\/11673\/revisions\/16167"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/media\/15089"}],"wp:attachment":[{"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/media?parent=11673"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}