{"id":11736,"date":"2025-12-25T20:03:50","date_gmt":"2025-12-25T12:03:50","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=11736"},"modified":"2026-06-25T15:18:31","modified_gmt":"2026-06-25T07:18:31","slug":"o1-tool-steel-heat-treatment","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/o1-tool-steel-heat-treatment\/","title":{"rendered":"Tabela de Tratamento T\u00e9rmico do A\u00e7o Ferramenta O1: Guia de Endurecimento, T\u00eampera em \u00d3leo e Revenido"},"content":{"rendered":"<section class=\"aobo-o1-heat-treatment-page\">\n  <style>\n    .aobo-o1-heat-treatment-page {\n      --aobo-blue: #0c56d0;\n      --aobo-blue-dark: #073b8e;\n      --aobo-blue-soft: #eaf2ff;\n      --aobo-blue-line: #c9dcff;\n      --aobo-border: #d7e5fb;\n      --aobo-text: #203044;\n      --aobo-muted: #617087;\n      --aobo-orange: #f59b23;\n      --aobo-white: #ffffff;\n      --aobo-shadow: 0 18px 45px rgba(12, 86, 208, 0.10);\n      font-family: Arial, Helvetica, sans-serif;\n 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pr\u00e9-aquecimento a cerca de 650\u00b0C (1200\u00b0F), austenitiza\u00e7\u00e3o a 788-816\u00b0C (1450-1500\u00b0F), t\u00eampera em \u00f3leo quente com agita\u00e7\u00e3o e revenimento de acordo com a dureza final desejada.<\/p>\n      <p>Ap\u00f3s t\u00eampera e revenido adequados, o a\u00e7o O1 geralmente atinge uma dureza de 57-63 HRC. A dureza ap\u00f3s t\u00eampera \u00e9 normalmente de cerca de 64-65 HRC, mas essa condi\u00e7\u00e3o \u00e9 muito fr\u00e1gil para uso em servi\u00e7o e deve ser revenida imediatamente.<\/p>\n    <\/header>\n\n    <main class=\"aobo-article\">\n      <p>Como o a\u00e7o O1 \u00e9 um a\u00e7o ferramenta para trabalho a frio com t\u00eampera em \u00f3leo, os principais riscos associados ao tratamento t\u00e9rmico s\u00e3o trincas por t\u00eampera, distor\u00e7\u00e3o, descarboneta\u00e7\u00e3o, pontos fracos e revenido tardio. Esses problemas geralmente s\u00e3o causados por controle inadequado de temperatura, geometria inadequada da ferramenta, agita\u00e7\u00e3o insuficiente do \u00f3leo, imers\u00e3o excessiva ou por deixar a pe\u00e7a sem revenido ap\u00f3s a t\u00eampera.<\/p>\n      <p>Este guia fornece uma tabela pr\u00e1tica de tratamento t\u00e9rmico O1, abrangendo al\u00edvio de tens\u00f5es, recozimento, pr\u00e9-aquecimento, austenitiza\u00e7\u00e3o, t\u00eampera em \u00f3leo, temperaturas de revenido, dureza esperada, altera\u00e7\u00e3o dimensional e falhas comuns em tratamentos t\u00e9rmicos.<\/p>\n\n      <h2>Tabela de temperaturas de tratamento t\u00e9rmico do a\u00e7o ferramenta O1<\/h2>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead><tr><th>Processo de tratamento t\u00e9rmico<\/th><th>Temperatura \u00b0F<\/th><th>Temperatura \u00b0C<\/th><th>Instru\u00e7\u00f5es pr\u00e1ticas<\/th><\/tr><\/thead>\n          <tbody>\n            <tr><td>Al\u00edvio do estresse<\/td><td>1200-1250\u00b0F<\/td><td>649-677\u00b0C<\/td><td>Deixe de molho por 1 a 2 horas por cada polegada de espessura. Resfrie lentamente. Use ap\u00f3s usinagem pesada e antes da t\u00eampera.<\/td><\/tr>\n            <tr><td>Recozimento<\/td><td>1350-1450\u00b0F<\/td><td>730-788\u00b0C<\/td><td>Deixe de molho por bastante tempo. Resfrie o forno lentamente at\u00e9 cerca de 482-540\u00b0C (900-1000\u00b0F) e, em seguida, deixe esfriar ao ar livre.<\/td><\/tr>\n            <tr><td>Pr\u00e9-aquecimento<\/td><td>Aproximadamente 1200\u00b0F<\/td><td>Aproximadamente 650\u00b0C<\/td><td>Mantenha em repouso por 10 a 15 minutos ou at\u00e9 que esteja aquecido uniformemente. N\u00e3o deixe de molho por muito tempo.<\/td><\/tr>\n            <tr><td>Austenitiza\u00e7\u00e3o \/ endurecimento<\/td><td>1450-1500\u00b0F<\/td><td>788-816\u00b0C<\/td><td>Aque\u00e7a desde a temperatura de pr\u00e9-aquecimento at\u00e9 a temperatura de endurecimento. Evite o superaquecimento e tempos de imers\u00e3o excessivos.<\/td><\/tr>\n            <tr><td>t\u00eampera de \u00f3leo<\/td><td>Retire do forno entre 125 e 200 \u00b0F (52-93 \u00b0C).<\/td><td>52-93\u00b0C<\/td><td>Resfrie em \u00f3leo morno e agitado. Fa\u00e7a o revenimento imediatamente ap\u00f3s a t\u00eampera.<\/td><\/tr>\n            <tr><td>T\u00eampera<\/td><td>300-600\u00b0F normalmente<\/td><td>149-316\u00b0C normalmente<\/td><td>Mantenha a temperatura por cerca de 2 horas por polegada de espessura da se\u00e7\u00e3o. Selecione a temperatura de acordo com a dureza final desejada.<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>Para a maioria das ferramentas de trabalho a frio, o a\u00e7o O1 \u00e9 geralmente temperado entre 149\u00b0C e 260\u00b0C (300\u00b0F e 500\u00b0F). Essa faixa de temperatura mant\u00e9m a alta dureza, ao mesmo tempo que reduz a fragilidade causada pela t\u00eampera.<\/p>\n\n      <h2>Como realizar o tratamento t\u00e9rmico do a\u00e7o ferramenta O1<\/h2>\n      <p>O tratamento t\u00e9rmico do a\u00e7o O1 normalmente inclui pr\u00e9-aquecimento, austenitiza\u00e7\u00e3o, t\u00eampera em \u00f3leo e revenido. O al\u00edvio de tens\u00f5es \u00e9 adicionado quando a pe\u00e7a foi submetida a usinagem intensiva. O recozimento \u00e9 utilizado para amolecer o a\u00e7o O1 endurecido para retrabalho.<\/p>\n\n      <h3>1. Al\u00edvio do estresse antes do endurecimento<\/h3>\n      <p>Recomenda-se o al\u00edvio de tens\u00f5es ap\u00f3s usinagem pesada, desbaste grosseiro ou retifica\u00e7\u00e3o irregular. Esses processos podem deixar tens\u00f5es internas na ferramenta. Se a pe\u00e7a for endurecida sem al\u00edvio de tens\u00f5es, as tens\u00f5es residuais podem se combinar com as tens\u00f5es de t\u00eampera, causando empenamento ou trincas.<\/p>\n      <p>Aque\u00e7a o a\u00e7o O1 n\u00e3o temperado lentamente a 649-677 \u00b0C (1200-1250 \u00b0F), mantenha nessa temperatura por 1 a 2 horas por polegada de espessura e, em seguida, resfrie lentamente. Esta etapa n\u00e3o tempera o a\u00e7o. Seu objetivo \u00e9 reduzir a tens\u00e3o interna antes do ciclo final de t\u00eampera.<\/p>\n\n      <h3>2. Recozimento do a\u00e7o ferramenta O1<\/h3>\n      <p>O recozimento \u00e9 usado para amolecer o a\u00e7o O1 endurecido para usinagem ou corre\u00e7\u00e3o. Aque\u00e7a o a\u00e7o a 730-788\u00b0C (1350-1450\u00b0F), mantenha nessa temperatura por bastante tempo e, em seguida, resfrie lentamente no forno at\u00e9 cerca de 482-540\u00b0C (900-1000\u00b0F) antes de resfri\u00e1-lo ao ar.<\/p>\n      <p>A prote\u00e7\u00e3o da superf\u00edcie \u00e9 importante durante o recozimento e a t\u00eampera. Se o a\u00e7o O1 for aquecido em uma atmosfera oxidante, a superf\u00edcie pode perder carbono. Uma superf\u00edcie descarbonetada n\u00e3o endurecer\u00e1 adequadamente e poder\u00e1 sofrer desgaste r\u00e1pido em servi\u00e7o.<\/p>\n\n      <h3>3. Pr\u00e9-aquecimento do a\u00e7o ferramenta O1<\/h3>\n      <p>O pr\u00e9-aquecimento reduz o choque t\u00e9rmico antes que o a\u00e7o atinja a faixa de austenitiza\u00e7\u00e3o. \u00c9 especialmente \u00fatil para pe\u00e7as com espessura de se\u00e7\u00e3o irregular, cantos vivos ou tens\u00f5es de usinagem.<\/p>\n      <p>Pr\u00e9-aque\u00e7a o forno O1 a cerca de 650 \u00b0C (1200 \u00b0F) e mantenha nessa temperatura por 10 a 15 minutos, ou at\u00e9 que a pe\u00e7a esteja aquecida uniformemente. Esta deve ser uma etapa r\u00e1pida de equaliza\u00e7\u00e3o, n\u00e3o um aquecimento prolongado.<\/p>\n\n      <h3>4. Austenitiza\u00e7\u00e3o e Endurecimento do A\u00e7o Ferramenta O1<\/h3>\n      <p>A austenitiza\u00e7\u00e3o \u00e9 a principal etapa de endurecimento. O a\u00e7o O1 \u00e9 geralmente aquecido a 788-816\u00b0C (1450-1500\u00b0F) antes do resfriamento em \u00f3leo.<\/p>\n      <p>A extremidade inferior dessa faixa geralmente \u00e9 mais segura quando a tenacidade e o controle dimensional s\u00e3o importantes. A extremidade superior pode aumentar a dureza e a resist\u00eancia ao desgaste, mas o superaquecimento ou a perman\u00eancia excessiva na temperatura podem aumentar a austenita retida, reduzir a estabilidade dimensional e resultar em uma dureza menor do que a esperada ap\u00f3s o resfriamento.<\/p>\n      <p>A pe\u00e7a deve permanecer imersa apenas pelo tempo necess\u00e1rio para que a se\u00e7\u00e3o atinja uma temperatura uniforme. O aquecimento insuficiente pode causar endurecimento incompleto. O superaquecimento pode causar dureza inst\u00e1vel, distor\u00e7\u00e3o ou fragilidade.<\/p>\n\n      <h3>5. T\u00eampera em \u00f3leo O1 A\u00e7o ferramenta<\/h3>\n      <p>O eletrodo O1 deve ser resfriado em \u00f3leo para atingir a dureza m\u00e1xima. O \u00f3leo deve estar morno e devidamente agitado. \u00d3leo parado pode criar uma camada de vapor ao redor da pe\u00e7a quente, retardando o resfriamento local e causando pontos amolecidos.<\/p>\n      <p>A faixa de temperatura ideal para t\u00eampera em \u00f3leo \u00e9 de aproximadamente 25 a 60 \u00b0C (75 a 140 \u00b0F), dependendo do \u00f3leo e das pr\u00e1ticas da oficina. Ap\u00f3s a t\u00eampera, retire a pe\u00e7a do \u00f3leo quando a temperatura atingir cerca de 52 a 93 \u00b0C (125 a 200 \u00b0F).<\/p>\n      <p>A pe\u00e7a deve ser temperada enquanto ainda estiver quente. A t\u00eampera tardia \u00e9 uma das causas mais comuns de fissuras no a\u00e7o O1 temperado.<\/p>\n\n      <h3>6. T\u00eampera do a\u00e7o ferramenta O1<\/h3>\n      <p>O revenimento reduz a tens\u00e3o e a fragilidade da martensita rec\u00e9m-temperada. Tamb\u00e9m define a dureza final de trabalho.<\/p>\n      <p>Para a maioria das ferramentas de trabalho a frio O1, o revenimento \u00e9 normalmente realizado entre 149-260\u00b0C (300\u00b0F e 500\u00b0F). Uma temperatura de refer\u00eancia comum \u00e9 177\u00b0C (350\u00b0F), que normalmente resulta em uma dureza de cerca de 62-63 HRC ap\u00f3s o endurecimento adequado.<\/p>\n      <p>Uma regra comum para o tempo de t\u00eampera \u00e9 de 2 horas por polegada de espessura da se\u00e7\u00e3o. A t\u00eampera simples \u00e9 frequentemente usada para O1, mas a t\u00eampera dupla pode ser usada quando se requer maior estabilidade ou al\u00edvio de tens\u00f5es. Se a t\u00eampera dupla for utilizada, a ferramenta deve esfriar at\u00e9 a temperatura ambiente entre os ciclos.<\/p>\n\n      <h2>Tabela de t\u00eampera do a\u00e7o ferramenta O1<\/h2>\n      <p>A dureza O1 diminui com o aumento da temperatura de revenido. Os valores a seguir representam os n\u00edveis t\u00edpicos de dureza esperados ap\u00f3s austenitiza\u00e7\u00e3o e t\u00eampera em \u00f3leo adequadas.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead><tr><th>Temperatura de t\u00eampera \u00b0F<\/th><th>Temperatura de t\u00eampera \u00b0C<\/th><th>Dureza esperada HRC<\/th><\/tr><\/thead>\n          <tbody>\n            <tr><td>Como extinto<\/td><td>Como extinto<\/td><td>64-65 HRC<\/td><\/tr>\n            <tr><td>300\u00b0F<\/td><td>149\u00b0C<\/td><td>Aproximadamente 63 HRC<\/td><\/tr>\n            <tr><td>350\u00b0F<\/td><td>177\u00b0C<\/td><td>Aproximadamente 62-63 HRC<\/td><\/tr>\n            <tr><td>400\u00b0F<\/td><td>204\u00b0C<\/td><td>Aproximadamente 62 HRC<\/td><\/tr>\n            <tr><td>500\u00b0F<\/td><td>260\u00b0C<\/td><td>Cerca de 60 HRC<\/td><\/tr>\n            <tr><td>600\u00b0F<\/td><td>316\u00b0C<\/td><td>Cerca de 57 HRC<\/td><\/tr>\n            <tr><td>700\u00b0F<\/td><td>371\u00b0C<\/td><td>Aproximadamente 53 HRC<\/td><\/tr>\n            <tr><td>800\u00b0F<\/td><td>427\u00b0C<\/td><td>Cerca de 50 HRC<\/td><\/tr>\n            <tr><td>900\u00b0F<\/td><td>482\u00b0C<\/td><td>Aproximadamente 47 HRC<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n\n      <h2>Dureza do a\u00e7o ferramenta O1 ap\u00f3s tratamento t\u00e9rmico<\/h2>\n      <p>O a\u00e7o O1 geralmente atinge cerca de 64-65 HRC imediatamente ap\u00f3s a t\u00eampera em \u00f3leo. Essa condi\u00e7\u00e3o, ap\u00f3s a t\u00eampera, \u00e9 muito quebradi\u00e7a para uso em servi\u00e7o e precisa ser revenida.<\/p>\n      <p>Ap\u00f3s o revenido, a dureza de trabalho t\u00edpica \u00e9 de cerca de 57-63 HRC. O valor final depende principalmente da temperatura de revenido, da dimens\u00e3o da se\u00e7\u00e3o transversal, do controle da austenitiza\u00e7\u00e3o e da efic\u00e1cia da t\u00eampera.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead><tr><th>Condi\u00e7\u00f5es de tratamento t\u00e9rmico<\/th><th>Dureza t\u00edpica<\/th><\/tr><\/thead>\n          <tbody>\n            <tr><td>Como resfriado rapidamente, antes do revenimento.<\/td><td>64-65 HRC<\/td><\/tr>\n            <tr><td>Temperado a 149\u00b0C (300\u00b0F)<\/td><td>Aproximadamente 63 HRC<\/td><\/tr>\n            <tr><td>Temperado a 177\u00b0C (350\u00b0F)<\/td><td>Aproximadamente 62-63 HRC<\/td><\/tr>\n            <tr><td>Temperado a 500\u00b0F \/ 260\u00b0C<\/td><td>Cerca de 60 HRC<\/td><\/tr>\n            <tr><td>Temperado a 600\u00b0F \/ 316\u00b0C<\/td><td>Cerca de 57 HRC<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>O a\u00e7o O1 endurece bem em se\u00e7\u00f5es pequenas e moderadas. Se\u00e7\u00f5es muito grandes podem n\u00e3o resfriar r\u00e1pido o suficiente no n\u00facleo, de modo que a dureza no centro pode ser menor que a dureza da superf\u00edcie.<\/p>\n\n      <h2>O1 Tratamento T\u00e9rmico: Controle de Altera\u00e7\u00e3o Dimensional e Distor\u00e7\u00e3o<\/h2>\n      <p>O a\u00e7o ferramenta O1 sofre altera\u00e7\u00f5es dimensionais durante o tratamento t\u00e9rmico devido \u00e0 transforma\u00e7\u00e3o de sua microestrutura, do estado recozido para o estado martens\u00edtico, durante a t\u00eampera em \u00f3leo. Um valor de expans\u00e3o esperado na pr\u00e1tica \u00e9 de aproximadamente 0,0015 pol\/pol, ou cerca de 0,15 mm em 100 mm.<\/p>\n      <p>Este valor deve ser usado apenas como refer\u00eancia. A varia\u00e7\u00e3o dimensional real depende da temperatura de austenitiza\u00e7\u00e3o, do controle do tempo de perman\u00eancia na temperatura, da velocidade de t\u00eampera, da agita\u00e7\u00e3o do \u00f3leo, da dimens\u00e3o da se\u00e7\u00e3o transversal e da temperatura de revenido. Se o a\u00e7o for superaquecido ou mantido por muito tempo na temperatura de t\u00eampera, a varia\u00e7\u00e3o dimensional ap\u00f3s a t\u00eampera e o revenido pode se tornar menos previs\u00edvel.<\/p>\n      <p>A distor\u00e7\u00e3o durante o tratamento t\u00e9rmico O1 \u00e9 causada principalmente pelo aquecimento e resfriamento desiguais, bem como pela transforma\u00e7\u00e3o martens\u00edtica n\u00e3o uniforme durante a t\u00eampera em \u00f3leo. Como o tratamento O1 requer t\u00eampera em meio l\u00edquido, ele \u00e9 mais sens\u00edvel \u00e0 tens\u00e3o de t\u00eampera do que a\u00e7os de t\u00eampera ao ar, como o A2.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead><tr><th>Fator de tratamento t\u00e9rmico<\/th><th>Poss\u00edvel resultado<\/th><th>M\u00e9todo de controle<\/th><\/tr><\/thead>\n          <tbody>\n            <tr><td>Aquecimento irregular antes da austenitiza\u00e7\u00e3o<\/td><td>Diferen\u00e7a de temperatura entre a superf\u00edcie e o n\u00facleo<\/td><td>Utilize o pr\u00e9-aquecimento adequado antes do endurecimento.<\/td><\/tr>\n            <tr><td>Temperatura de austenitiza\u00e7\u00e3o excessiva<\/td><td>Mudan\u00e7a dimensional menos previs\u00edvel<\/td><td>Mantenha-se dentro da faixa de endurecimento recomendada.<\/td><\/tr>\n            <tr><td>Tempo de imers\u00e3o excessivo<\/td><td>Aumento da instabilidade dimensional<\/td><td>Deixe de molho apenas pelo tempo necess\u00e1rio para um aquecimento uniforme.<\/td><\/tr>\n            <tr><td>Resfriamento desigual do \u00f3leo<\/td><td>Deforma\u00e7\u00e3o, curvatura ou varia\u00e7\u00e3o de dureza local<\/td><td>Use \u00f3leo de t\u00eampera morno e bem agitado.<\/td><\/tr>\n            <tr><td>Temperatura de t\u00eampera inadequada<\/td><td>Altera\u00e7\u00e3o na dureza e no tamanho fora da faixa alvo.<\/td><td>Selecione a temperatura de revenimento de acordo com a dureza desejada.<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>O objetivo n\u00e3o \u00e9 eliminar completamente a varia\u00e7\u00e3o dimensional, mas torn\u00e1-la previs\u00edvel. Para ferramentas de precis\u00e3o O1, a sobremedida para usinagem final ou retifica\u00e7\u00e3o deve ser planejada antes do tratamento t\u00e9rmico.<\/p>\n\n      <figure class=\"aobo-figure\">\n        <img decoding=\"async\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/12\/O1-Tempering-Size-Change-Chart.avif\" alt=\"Tabela de varia\u00e7\u00e3o do tamanho da t\u00eampera O1\" loading=\"lazy\">\n        <figcaption>Tabela de varia\u00e7\u00e3o de tamanho por revenimento O1. Fonte: William E. Bryson, Tratamento t\u00e9rmico, sele\u00e7\u00e3o e aplica\u00e7\u00e3o de a\u00e7os para ferramentas, p. 208.<\/figcaption>\n      <\/figure>\n\n      <h2>Problemas comuns no tratamento t\u00e9rmico do a\u00e7o ferramenta O1<\/h2>\n      <p>A maioria dos problemas de tratamento t\u00e9rmico O1 decorre do controle inadequado da temperatura, t\u00eampera em \u00f3leo deficiente, revenimento tardio, descarboneta\u00e7\u00e3o ou geometria inadequada da pe\u00e7a.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead><tr><th>Problema<\/th><th>Causa<\/th><th>Resultado<\/th><th>Preven\u00e7\u00e3o<\/th><\/tr><\/thead>\n          <tbody>\n            <tr><td>Rachaduras por t\u00eampera<\/td><td>Cantos vivos, alta tens\u00e3o, t\u00eampera retardada<\/td><td>Rachaduras durante ou ap\u00f3s o resfriamento<\/td><td>Melhore o design, alivie o estresse, acalme-se imediatamente.<\/td><\/tr>\n            <tr><td>Descarboneta\u00e7\u00e3o<\/td><td>Aquecimento em atmosfera oxidante<\/td><td>Superf\u00edcie macia ap\u00f3s o endurecimento<\/td><td>Utilize v\u00e1cuo, atmosfera protetora, banho de sal ou prote\u00e7\u00e3o de superf\u00edcie.<\/td><\/tr>\n            <tr><td>Baixa dureza<\/td><td>Subaquecimento, t\u00eampera fraca, superaquecimento, austenita retida<\/td><td>A ferramenta n\u00e3o atinge a dureza desejada.<\/td><td>Controle a temperatura de austenitiza\u00e7\u00e3o e as condi\u00e7\u00f5es de t\u00eampera.<\/td><\/tr>\n            <tr><td>Pontos fracos<\/td><td>Agita\u00e7\u00e3o deficiente do \u00f3leo, camada de vapor, incrusta\u00e7\u00f5es superficiais<\/td><td>dureza local n\u00e3o uniforme<\/td><td>Limpe a pe\u00e7a e use \u00f3leo agitado.<\/td><\/tr>\n            <tr><td>Distor\u00e7\u00e3o excessiva<\/td><td>Tens\u00f5es de usinagem, se\u00e7\u00f5es irregulares, controle inadequado de t\u00eampera<\/td><td>Deforma\u00e7\u00e3o ou curvatura<\/td><td>Aliviar o estresse, pr\u00e9-aquecer, melhorar a geometria da ferramenta<\/td><\/tr>\n            <tr><td>Temperamento excessivo<\/td><td>Temperar muito quente ou moer queima<\/td><td>Perda de dureza<\/td><td>Controle a temperatura de t\u00eampera e moagem.<\/td><\/tr>\n            <tr><td>Subtemperagem<\/td><td>Temperatura muito baixa ou imers\u00e3o insuficiente.<\/td><td>Fragilidade e fissura\u00e7\u00e3o precoce<\/td><td>Tempere imediatamente e deixe de molho por tempo suficiente.<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>A fissura\u00e7\u00e3o por t\u00eampera \u00e9 frequentemente atribu\u00edda ao material, mas em muitos casos a causa real \u00e9 a geometria da ferramenta, a tens\u00e3o de usinagem, a severidade da t\u00eampera ou o revenido tardio. O tratamento t\u00e9rmico O1 deve ser realizado com cautela quando a pe\u00e7a apresentar cantos vivos, almas finas, furos cegos ou grandes diferen\u00e7as de se\u00e7\u00e3o transversal.<\/p>\n      <p>A descarboneta\u00e7\u00e3o tamb\u00e9m \u00e9 importante porque uma superf\u00edcie com baixo teor de carbono n\u00e3o consegue endurecer adequadamente. Uma camada superficial macia reduz a resist\u00eancia ao desgaste e pode criar uma transforma\u00e7\u00e3o irregular entre a superf\u00edcie e o n\u00facleo.<\/p>\n\n      <h2>Tratamento t\u00e9rmico do a\u00e7o ferramenta O1 para aplica\u00e7\u00f5es em ferramentas de trabalho a frio<\/h2>\n      <p>O a\u00e7o O1 \u00e9 utilizado em ferramentas de trabalho a frio quando a ferramenta requer alta dureza, boa usinabilidade antes do endurecimento e controle dimensional razo\u00e1vel ap\u00f3s a t\u00eampera em \u00f3leo. As aplica\u00e7\u00f5es t\u00edpicas incluem pun\u00e7\u00f5es, matrizes de corte, matrizes de conforma\u00e7\u00e3o, matrizes de rebarba\u00e7\u00e3o, calibradores, buchas, eixos, brochas, machos, alargadores, cossinetes e cortadores de fenda.<\/p>\n      <p>Para essas ferramentas, o tratamento t\u00e9rmico geralmente se concentra em tr\u00eas pontos: atingir a dureza m\u00e1xima durante a t\u00eampera em \u00f3leo, revenimento para manter a resist\u00eancia ao desgaste e controle da distor\u00e7\u00e3o para que a ferramenta permane\u00e7a utiliz\u00e1vel ap\u00f3s o endurecimento.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead><tr><th>Requisitos de ferramental<\/th><th>Tratamento t\u00e9rmico com foco no tratamento t\u00e9rmico<\/th><\/tr><\/thead>\n          <tbody>\n            <tr><td>Reten\u00e7\u00e3o de ponta<\/td><td>Use uma temperatura de revenimento mais baixa para manter uma alta dureza.<\/td><\/tr>\n            <tr><td>Perfura\u00e7\u00e3o e corte<\/td><td>Equilibre a dureza com a tenacidade para reduzir o lascamento.<\/td><\/tr>\n            <tr><td>Medidores e ferramentas de precis\u00e3o<\/td><td>Controle a altera\u00e7\u00e3o de tamanho e a distor\u00e7\u00e3o.<\/td><\/tr>\n            <tr><td>Ferramentas usinadas com precis\u00e3o<\/td><td>Alivie o estresse antes de endurecer<\/td><\/tr>\n            <tr><td>Geometria complexa da ferramenta<\/td><td>Reduzir a concentra\u00e7\u00e3o de tens\u00f5es e o risco de fissuras por t\u00eampera<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>O a\u00e7o O1 n\u00e3o \u00e9 ideal para todas as ferramentas de trabalho a frio. Para longas s\u00e9ries de produ\u00e7\u00e3o ou desgaste abrasivo severo, o a\u00e7o D2 pode oferecer melhor resist\u00eancia ao desgaste. Para ferramentas complexas que exigem maior estabilidade dimensional durante a t\u00eampera, o a\u00e7o A2 pode ser mais seguro. Para ferramentas expostas a altas temperaturas de servi\u00e7o, o a\u00e7o O1 pode perder dureza devido \u00e0 sua limitada resist\u00eancia ao amolecimento.<\/p>\n\n      <div class=\"aobo-note-box\">\n        <p>A Aobo Steel n\u00e3o oferece servi\u00e7o de tratamento t\u00e9rmico final. Este guia \u00e9 fornecido como refer\u00eancia t\u00e9cnica para clientes que adquirem a\u00e7o ferramenta O1 e precisam entender os processos de t\u00eampera, revenimento em \u00f3leo, revenimento em a\u00e7o, controle de dureza e altera\u00e7\u00f5es dimensionais.<\/p>\n      <\/div>\n    <\/main>\n\n    <section class=\"aobo-final-cta\">\n      <div>\n        <h2>Precisa de a\u00e7o ferramenta O1 para ferramentas de trabalho a frio?<\/h2>\n        <p>A Aobo Steel fornece barras redondas e barras chatas de a\u00e7o ferramenta O1 \/ 1.2510 \/ SKS3, recozidas, para grandes encomendas industriais. Envie-nos as dimens\u00f5es, a quantidade, a toler\u00e2ncia e a aplica\u00e7\u00e3o desejadas.<\/p>\n      <\/div>\n      <a class=\"aobo-btn popmake-16052\" href=\"javascript:void(0);\">Enviar consulta<\/a>\n    <\/section>\n  <\/div>\n<\/section>","protected":false},"excerpt":{"rendered":"<p>Tool Steel Heat Treatment Guide O1 Tool Steel Heat Treatment Guide O1 tool steel is typically heat-treated by preheating to about 1200\u00b0F \/ 650\u00b0C, austenitizing at 1450-1500\u00b0F \/ 788-816\u00b0C, quenching in warm agitated oil, and tempering according to the required final hardness. After proper hardening and tempering, O1 commonly reaches about 57-63 HRC. The as-quenched [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":15100,"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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":"[]"},"class_list":["post-11736","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.0 (Yoast SEO v28.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>O1 Tool Steel Heat Treatment Chart: Hardening, Oil Quench &amp; 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After proper hardening and tempering, O1 commonly reaches about 57-63 HRC. The as-quenched&hellip;","rttpg_featured_image_url":{"full":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/O1-heat-treatment-ad.avif",1254,1254,false],"landscape":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/O1-heat-treatment-ad.avif",1254,1254,false],"portraits":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/O1-heat-treatment-ad.avif",1254,1254,false],"thumbnail":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/O1-heat-treatment-ad-150x150.avif",150,150,true],"medium":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/O1-heat-treatment-ad-300x300.avif",300,300,true],"large":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/O1-heat-treatment-ad-1024x1024.avif",1024,1024,true],"1536x1536":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/O1-heat-treatment-ad.avif",1254,1254,false],"2048x2048":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/O1-heat-treatment-ad.avif",1254,1254,false],"trp-custom-language-flag":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/O1-heat-treatment-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":"Tool Steel Heat Treatment Guide O1 Tool Steel Heat Treatment Guide O1 tool steel is typically heat-treated by preheating to about 1200\u00b0F \/ 650\u00b0C, austenitizing at 1450-1500\u00b0F \/ 788-816\u00b0C, quenching in warm agitated oil, and tempering according to the required final hardness. After proper hardening and tempering, O1 commonly reaches about 57-63 HRC. The as-quenched&hellip;","_links":{"self":[{"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/pages\/11736","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=11736"}],"version-history":[{"count":1,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/pages\/11736\/revisions"}],"predecessor-version":[{"id":16158,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/pages\/11736\/revisions\/16158"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/media\/15100"}],"wp:attachment":[{"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/media?parent=11736"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}