{"id":15288,"date":"2026-05-13T10:41:51","date_gmt":"2026-05-13T02:41:51","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=15288"},"modified":"2026-06-25T10:02:03","modified_gmt":"2026-06-25T02:02:03","slug":"420-stainless-steel-heat-treatment","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/420-stainless-steel-heat-treatment\/","title":{"rendered":"Guia de Tratamento T\u00e9rmico do A\u00e7o 420 | Endurecimento, T\u00eampera e Revenimento"},"content":{"rendered":"<section class=\"aobo-420-heat-treatment-page\">\n  <style>\n    .aobo-420-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-white: #ffffff;\n      --aobo-shadow: 0 18px 45px rgba(12, 86, 208, 0.10);\n      --aobo-page-width: 1180px;\n      font-family:inherit;\n      color: var(--aobo-text);\n      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padding: 20px;\n      }\n\n      .aobo-supply-image {\n        width: min(190px, 100%);\n        margin: 0 auto;\n      }\n\n      .aobo-supply-actions .aobo-btn {\n        width: 100%;\n      }\n    }\n  <\/style>\n\n  <div class=\"aobo-wrap\">\n    <header class=\"aobo-hero\">\n      <span class=\"aobo-eyebrow\">Guia de Tratamento T\u00e9rmico do A\u00e7o Inoxid\u00e1vel 420<\/span>\n      <h1>Guia de Tratamento T\u00e9rmico do A\u00e7o Inoxid\u00e1vel 420<\/h1>\n      <p>Tratamento t\u00e9rmico <a href=\"https:\/\/aobosteel.com\/pt\/420-stainless-steel\/\">A\u00e7o inoxid\u00e1vel 420<\/a>, Pr\u00e9-aque\u00e7a a cerca de 650 \u00b0C \/ 1200 \u00b0F, depois austenitize a 954\u20131010 \u00b0C \/ 1750\u20131850 \u00b0F, seguido de t\u00eampera ao ar ou em \u00f3leo. Ap\u00f3s a t\u00eampera, revena imediatamente de acordo com a dureza, tenacidade e resist\u00eancia \u00e0 corros\u00e3o necess\u00e1rias.<\/p>\n      <p>Para aplica\u00e7\u00f5es que exigem alta dureza, o a\u00e7o inoxid\u00e1vel 420 geralmente \u00e9 temperado a temperaturas mais baixas. Os pontos de refer\u00eancia t\u00edpicos s\u00e3o cerca de 150 \u00b0C \/ 300 \u00b0F para uma dureza m\u00ednima de aproximadamente 52 HRC, 204 \u00b0C \/ 400 \u00b0F para uma dureza m\u00ednima de aproximadamente 50 HRC e 316 \u00b0C \/ 600 \u00b0F para uma dureza m\u00ednima de aproximadamente 48 HRC.<\/p>\n      <p>A faixa de t\u00eampera de 427\u2013566\u00b0C \/ 800\u20131050\u00b0F deve ser geralmente evitada, pois pode reduzir a resist\u00eancia ao impacto e \u00e0 corros\u00e3o.<\/p>\n    <\/header>\n\n    <main class=\"aobo-article\">\n      <section class=\"aobo-supply-block\" aria-label=\"Informa\u00e7\u00f5es sobre o produto e consulta de produtos em a\u00e7o inoxid\u00e1vel 420\">\n        <div class=\"aobo-supply-image\">\n          <img decoding=\"async\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/07\/420-stainless-steel.avif\" alt=\"A\u00e7o inoxid\u00e1vel 420 fornecido pela Aobo Steel.\" loading=\"lazy\">\n        <\/div>\n        <div class=\"aobo-supply-content\">\n          <h2>Precisa de a\u00e7o inoxid\u00e1vel 420 para pe\u00e7as tratadas termicamente?<\/h2>\n          <p>A Aobo Steel fornece a\u00e7o inoxid\u00e1vel 420 para moldes, l\u00e2minas, eixos, pe\u00e7as de desgaste e componentes de precis\u00e3o. Envie-nos as dimens\u00f5es, a quantidade e o acabamento superficial desejados para suporte no fornecimento em grande escala.<\/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\/420-stainless-steel\/\">Veja 420 A\u00e7o Inoxid\u00e1vel<\/a>\n          <\/div>\n        <\/div>\n      <\/section>\n\n      <p>O a\u00e7o inoxid\u00e1vel 420 \u00e9 um a\u00e7o inoxid\u00e1vel martens\u00edtico temper\u00e1vel. Ap\u00f3s tratamento t\u00e9rmico adequado, normalmente atinge 46\u201352 HRC em aplica\u00e7\u00f5es de trabalho, mantendo boa resist\u00eancia ao desgaste, capacidade de polimento e resist\u00eancia moderada \u00e0 corros\u00e3o. O desempenho final depende da dimens\u00e3o da se\u00e7\u00e3o transversal, do m\u00e9todo de t\u00eampera, da temperatura de revenido, da atmosfera do forno e da aplica\u00e7\u00e3o requerida.<\/p>\n      <p>Este guia explica o processo pr\u00e1tico de tratamento t\u00e9rmico para o a\u00e7o inoxid\u00e1vel 420, incluindo pr\u00e9-aquecimento, austenitiza\u00e7\u00e3o, t\u00eampera, tabela de revenimento, dureza esperada, erros comuns e instru\u00e7\u00f5es de tratamento t\u00e9rmico baseadas na aplica\u00e7\u00e3o.<\/p>\n\n      <h2>Vis\u00e3o geral do processo de tratamento t\u00e9rmico do a\u00e7o inoxid\u00e1vel 420<\/h2>\n      <p>Os resultados finais do tratamento t\u00e9rmico do a\u00e7o inoxid\u00e1vel 420 dependem da temperatura de aquecimento, do tempo de perman\u00eancia na temperatura, do m\u00e9todo de t\u00eampera, da temperatura de revenido, da prote\u00e7\u00e3o da superf\u00edcie e da geometria da pe\u00e7a.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead>\n            <tr><th>Est\u00e1gio do Processo<\/th><th>Faixa ou m\u00e9todo t\u00edpico<\/th><th>Finalidade<\/th><th>Nota pr\u00e1tica<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>Limpeza<\/td><td>Antes de aquecer<\/td><td>Remova \u00f3leo, graxa e res\u00edduos.<\/td><td>Superf\u00edcies sujas podem prejudicar a resist\u00eancia \u00e0 corros\u00e3o e a qualidade da superf\u00edcie.<\/td><\/tr>\n            <tr><td>atmosfera protetora<\/td><td>V\u00e1cuo, atmosfera neutra ou banho de sal neutro<\/td><td>Reduzir a oxida\u00e7\u00e3o e a descarboneta\u00e7\u00e3o<\/td><td>Importante para pe\u00e7as polidas, moldes e aplica\u00e7\u00f5es resistentes \u00e0 corros\u00e3o.<\/td><\/tr>\n            <tr><td>Pr\u00e9-aquecimento<\/td><td>Aproximadamente 650\u00b0C \/ 1200\u00b0F<\/td><td>Reduzir o choque t\u00e9rmico<\/td><td>Especialmente \u00fatil para pe\u00e7as grandes, complexas ou de precis\u00e3o.<\/td><\/tr>\n            <tr><td>Austenitiza\u00e7\u00e3o<\/td><td>Aproximadamente 954\u20131010\u00b0C \/ 1750\u20131850\u00b0F<\/td><td>Prepare o a\u00e7o para t\u00eampera.<\/td><td>A vers\u00e3o de alta qualidade pode ser usada para obter m\u00e1xima dureza e resist\u00eancia \u00e0 corros\u00e3o.<\/td><\/tr>\n            <tr><td>Encharcando<\/td><td>Aproximadamente 30 minutos por polegada de espessura da se\u00e7\u00e3o mais grossa.<\/td><td>Aque\u00e7a a se\u00e7\u00e3o uniformemente.<\/td><td>Evite deixar de molho por tempo excessivo sem necessidade.<\/td><\/tr>\n            <tr><td>Resfriamento<\/td><td>Ar ou \u00f3leo<\/td><td>Forma martensita endurecida<\/td><td>Escolha com base no tamanho, formato e requisito de dureza da pe\u00e7a.<\/td><\/tr>\n            <tr><td>T\u00eampera<\/td><td>Depende das propriedades necess\u00e1rias.<\/td><td>Ajuste a dureza, a resist\u00eancia e a estabilidade.<\/td><td>Tempere imediatamente ap\u00f3s o resfriamento brusco.<\/td><\/tr>\n            <tr><td>t\u00eampera dupla<\/td><td>Frequentemente usado para pe\u00e7as cr\u00edticas<\/td><td>Melhora o al\u00edvio do estresse e a estabilidade.<\/td><td>Deixe esfriar at\u00e9 a temperatura ambiente entre as varia\u00e7\u00f5es de temperatura.<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>O recozimento n\u00e3o faz parte do ciclo principal de endurecimento. Ele \u00e9 utilizado quando o material precisa ser amolecido antes da usinagem, conforma\u00e7\u00e3o ou reendurecimento. Para o a\u00e7o inoxid\u00e1vel 420, o recozimento subcr\u00edtico pode ser realizado em torno de 675\u2013760 \u00b0C \/ 1245\u20131400 \u00b0F, enquanto o recozimento completo pode ser realizado em torno de 830\u2013885 \u00b0C \/ 1525\u20131625 \u00b0F, seguido de resfriamento controlado.<\/p>\n\n      <h2>Tratamento t\u00e9rmico passo a passo do a\u00e7o inoxid\u00e1vel 420<\/h2>\n      <p>O principal ciclo de endurecimento do a\u00e7o inoxid\u00e1vel 420 consiste em tr\u00eas etapas: pr\u00e9-aquecimento, austenitiza\u00e7\u00e3o e t\u00eampera, e revenido. A limpeza e o controle da atmosfera devem ser realizados antes do aquecimento, mas os resultados do tratamento t\u00e9rmico s\u00e3o determinados principalmente por essas tr\u00eas etapas.<\/p>\n\n      <h3>Passo 1: Pr\u00e9-aque\u00e7a o a\u00e7o inoxid\u00e1vel 420.<\/h3>\n      <p>O pr\u00e9-aquecimento reduz o choque t\u00e9rmico antes que o a\u00e7o atinja a temperatura de austenitiza\u00e7\u00e3o. Isso \u00e9 importante porque os a\u00e7os inoxid\u00e1veis conduzem o calor mais lentamente do que muitos a\u00e7os carbono e de baixa liga. O aquecimento r\u00e1pido pode criar diferen\u00e7as de temperatura entre a superf\u00edcie e o n\u00facleo, aumentando o risco de distor\u00e7\u00e3o ou fissura\u00e7\u00e3o.<\/p>\n      <p>Uma temperatura comum de pr\u00e9-aquecimento para o a\u00e7o inoxid\u00e1vel 420 \u00e9 de cerca de 650\u00b0C (1200\u00b0F).<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead>\n            <tr><th>Condi\u00e7\u00e3o da pe\u00e7a<\/th><th>Motivo pelo qual o pr\u00e9-aquecimento \u00e9 importante<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>Grandes se\u00e7\u00f5es<\/td><td>Reduz a diferen\u00e7a de temperatura entre a superf\u00edcie e o n\u00facleo.<\/td><\/tr>\n            <tr><td>se\u00e7\u00f5es finas ou irregulares<\/td><td>Reduz o risco de distor\u00e7\u00e3o<\/td><\/tr>\n            <tr><td>Cantos vivos ou formas complexas<\/td><td>Reduz o risco de rachaduras<\/td><\/tr>\n            <tr><td>Pe\u00e7as de molde de precis\u00e3o<\/td><td>Melhora a estabilidade dimensional<\/td><\/tr>\n            <tr><td>Pe\u00e7as previamente endurecidas<\/td><td>Reduz o choque t\u00e9rmico durante o reendurecimento.<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>Antes do pr\u00e9-aquecimento, a superf\u00edcie deve estar limpa. \u00d3leo, graxa e res\u00edduos ricos em carbono devem ser removidos. Para pe\u00e7as que exigem boa capacidade de polimento ou resist\u00eancia \u00e0 corros\u00e3o, o aquecimento deve ser realizado em v\u00e1cuo, atmosfera neutra ou banho de sal neutro.<\/p>\n\n      <h3>Etapa 2: Austenitiza\u00e7\u00e3o e t\u00eampera do a\u00e7o inoxid\u00e1vel 420<\/h3>\n      <p>Ap\u00f3s o pr\u00e9-aquecimento, aque\u00e7a o a\u00e7o 420 at\u00e9 a temperatura de t\u00eampera comum de 954\u20131010\u00b0C \/ 1750\u20131850\u00b0F.<\/p>\n      <p>A temperatura exata deve ser selecionada com base nas dimens\u00f5es da se\u00e7\u00e3o transversal, nas condi\u00e7\u00f5es do forno, nos dados da sider\u00fargica e na dureza final desejada. O limite superior da faixa de temperatura pode ser utilizado quando se exige m\u00e1xima dureza e resist\u00eancia \u00e0 corros\u00e3o, mas o superaquecimento deve ser evitado, pois pode aumentar o crescimento de gr\u00e3os, a distor\u00e7\u00e3o e o risco de fissuras.<\/p>\n      <p>Uma diretriz t\u00edpica de imers\u00e3o \u00e9 de cerca de 30 minutos por polegada da maior espessura da se\u00e7\u00e3o transversal. O objetivo \u00e9 um aquecimento uniforme em toda a se\u00e7\u00e3o. Imers\u00e3o excessiva n\u00e3o melhora o resultado e pode tornar a pe\u00e7a menos est\u00e1vel durante o resfriamento brusco.<\/p>\n      <p>Ap\u00f3s a imers\u00e3o, a pe\u00e7a deve ser resfriada rapidamente.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead>\n            <tr><th>M\u00e9todo de resfriamento<\/th><th>Melhor utilizado para<\/th><th>Vantagem<\/th><th>Cuidado<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>t\u00eampera por ar<\/td><td>Pe\u00e7as complexas, irregulares ou de precis\u00e3o<\/td><td>Menor risco de distor\u00e7\u00e3o e rachaduras<\/td><td>Pode ser lento demais para alguns trechos pesados.<\/td><\/tr>\n            <tr><td>t\u00eampera de \u00f3leo<\/td><td>Se\u00e7\u00f5es ou pe\u00e7as mais robustas que necessitam de uma resposta de endurecimento mais forte<\/td><td>Resfriamento mais r\u00e1pido e maior resposta de endurecimento<\/td><td>Maior risco de distor\u00e7\u00e3o e fissuras<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>A t\u00eampera ao ar costuma ser mais segura para pe\u00e7as com formatos complexos. A t\u00eampera em \u00f3leo pode ser utilizada quando se exige maior dureza e a geometria da pe\u00e7a permite uma t\u00eampera mais severa.<\/p>\n      <p>O resfriamento deve ser r\u00e1pido o suficiente na faixa cr\u00edtica para evitar a precipita\u00e7\u00e3o prejudicial de carbonetos nos contornos de gr\u00e3o. O resfriamento lento pode reduzir a resist\u00eancia \u00e0 corros\u00e3o. Ap\u00f3s a t\u00eampera, a pe\u00e7a deve ser revenida o mais r\u00e1pido poss\u00edvel.<\/p>\n\n      <h3>Etapa 3: Temperar o a\u00e7o inoxid\u00e1vel 420<\/h3>\n      <p>Para obter alta dureza, resist\u00eancia ao desgaste, capacidade de polimento e resist\u00eancia \u00e0 corros\u00e3o, temperaturas de revenimento mais baixas s\u00e3o geralmente preferidas.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead>\n            <tr><th>Temperatura de t\u00eampera<\/th><th>Dureza aproximada<\/th><th>Significado pr\u00e1tico<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>150\u00b0C \/ 300\u00b0F<\/td><td>Aproximadamente 52 HRC no m\u00ednimo<\/td><td>Alta dureza e reten\u00e7\u00e3o de fio.<\/td><\/tr>\n            <tr><td>204\u00b0C \/ 400\u00b0F<\/td><td>Aproximadamente 50 HRC no m\u00ednimo<\/td><td>T\u00eampera comum a baixa temperatura para pe\u00e7as temperadas em geral.<\/td><\/tr>\n            <tr><td>250\u00b0C \/ 480\u00b0F<\/td><td>Frequentemente acima de 50 HRC<\/td><td>Frequentemente utilizado quando a capacidade de polimento e a resist\u00eancia \u00e0 corros\u00e3o s\u00e3o importantes.<\/td><\/tr>\n            <tr><td>316\u00b0C \/ 600\u00b0F<\/td><td>Aproximadamente 48 HRC no m\u00ednimo<\/td><td>Menor dureza com maior resist\u00eancia.<\/td><\/tr>\n            <tr><td>593\u00b0C \/ 1100\u00b0F e acima<\/td><td>Menor dureza<\/td><td>Utilizado quando a resist\u00eancia \u00e9 mais importante que a dureza.<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>A t\u00eampera dupla \u00e9 frequentemente utilizada em pe\u00e7as cr\u00edticas de a\u00e7o inoxid\u00e1vel 420. A pe\u00e7a deve esfriar at\u00e9 a temperatura ambiente entre os ciclos de t\u00eampera. Isso ajuda a aliviar a tens\u00e3o interna e a melhorar a estabilidade dimensional.<\/p>\n      <p>A faixa de temperatura entre 427\u2013566 \u00b0C \/ 800\u20131050 \u00b0F deve ser geralmente evitada. O revenimento nessa faixa pode reduzir a resist\u00eancia ao impacto e \u00e0 corros\u00e3o. Se for necess\u00e1ria uma condi\u00e7\u00e3o mais macia e resistente, a temperatura de revenimento geralmente \u00e9 elevada para cerca de 593 \u00b0C \/ 1100 \u00b0F ou mais, com a clara aceita\u00e7\u00e3o de uma menor dureza.<\/p>\n\n      <h2>Tabela de t\u00eampera do a\u00e7o inoxid\u00e1vel 420<\/h2>\n      <p>A dureza por deforma\u00e7\u00e3o do a\u00e7o inoxid\u00e1vel 420 tratado termicamente situa-se tipicamente entre 46 e 52 HRC. A dureza final depende da temperatura de austenitiza\u00e7\u00e3o, da velocidade de t\u00eampera, da temperatura de revenido, da dimens\u00e3o da se\u00e7\u00e3o transversal e da condi\u00e7\u00e3o do a\u00e7o.<\/p>\n      <p>A tabela abaixo deve ser usada como uma refer\u00eancia pr\u00e1tica, n\u00e3o como um valor de dureza final garantido.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead>\n            <tr><th>Temperatura de t\u00eampera<\/th><th>Dureza aproximada<\/th><th>Dire\u00e7\u00e3o t\u00edpica<\/th><th>Aten\u00e7\u00e3o principal<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>150\u00b0C \/ 300\u00b0F<\/td><td>Aproximadamente 52 HRC no m\u00ednimo<\/td><td>Alta dureza, reten\u00e7\u00e3o de fio, resist\u00eancia ao desgaste<\/td><td>Menor resist\u00eancia<\/td><\/tr>\n            <tr><td>204\u00b0C \/ 400\u00b0F<\/td><td>Aproximadamente 50 HRC no m\u00ednimo<\/td><td>Aplica\u00e7\u00f5es gerais de alta dureza<\/td><td>Requer t\u00eampera adequada<\/td><\/tr>\n            <tr><td>250\u00b0C \/ 480\u00b0F<\/td><td>Frequentemente acima de 50 HRC<\/td><td>Moldes de pl\u00e1stico, pe\u00e7as polidas, pe\u00e7as endurecidas resistentes \u00e0 corros\u00e3o<\/td><td>A dureza final depende do endurecimento pr\u00e9vio.<\/td><\/tr>\n            <tr><td>316\u00b0C \/ 600\u00b0F<\/td><td>Aproximadamente 48 HRC no m\u00ednimo<\/td><td>Dureza moderada com melhor tenacidade.<\/td><td>A dureza come\u00e7a a diminuir.<\/td><\/tr>\n            <tr><td>400\u2013450 \u00b0C \/ 750\u2013840 \u00b0F<\/td><td>Em torno de 450 HB ou cerca de 47 HRC em alguns climas de primavera.<\/td><td>Requisitos especiais de primavera ou propriedade<\/td><td>N\u00e3o deve ser usado como uma faixa de t\u00eampera geral.<\/td><\/tr>\n            <tr><td>427\u2013566 \u00b0C \/ 800\u20131050 \u00b0F<\/td><td>Geralmente evitado<\/td><td>N\u00e3o recomendado para a maioria das aplica\u00e7\u00f5es.<\/td><td>Pode reduzir a resist\u00eancia ao impacto e a resist\u00eancia \u00e0 corros\u00e3o.<\/td><\/tr>\n            <tr><td>593\u00b0C \/ 1100\u00b0F e acima<\/td><td>Menor dureza<\/td><td>Aplica\u00e7\u00f5es de alta resist\u00eancia<\/td><td>Perda significativa de dureza<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>Para aplica\u00e7\u00f5es que exigem dureza acima de 50 HRC e boa resist\u00eancia \u00e0 corros\u00e3o, o revenimento a baixa temperatura geralmente \u00e9 a op\u00e7\u00e3o mais segura. Isso \u00e9 comum em moldes de pl\u00e1stico, ferramentas de corte, pe\u00e7as de desgaste, componentes polidos e pe\u00e7as expostas \u00e0 corros\u00e3o.<\/p>\n\n      <h2>Erros comuns no tratamento t\u00e9rmico do a\u00e7o inoxid\u00e1vel 420<\/h2>\n      <p>A maioria dos problemas de tratamento t\u00e9rmico com a\u00e7o inoxid\u00e1vel 420 decorre do controle inadequado do processo. As falhas mais comuns s\u00e3o distor\u00e7\u00e3o, fissuras, dureza insuficiente, baixa qualidade superficial, redu\u00e7\u00e3o da resist\u00eancia \u00e0 corros\u00e3o e perda de tenacidade.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead>\n            <tr><th>Erro<\/th><th>Resultado<\/th><th>Melhores Pr\u00e1ticas<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>Sem um alvo imobili\u00e1rio claro<\/td><td>Dire\u00e7\u00e3o de t\u00eampera incorreta<\/td><td>Defina se a prioridade \u00e9 dureza, tenacidade, resist\u00eancia \u00e0 corros\u00e3o, capacidade de polimento ou estabilidade dimensional.<\/td><\/tr>\n            <tr><td>Limpeza superficial inadequada<\/td><td>Danos na superf\u00edcie ou resist\u00eancia reduzida \u00e0 corros\u00e3o<\/td><td>Limpe \u00f3leo, graxa e res\u00edduos antes de aquecer.<\/td><\/tr>\n            <tr><td>Sem atmosfera protetora<\/td><td>Escama\u00e7\u00e3o ou descarboneta\u00e7\u00e3o<\/td><td>Utilize v\u00e1cuo, atmosfera neutra ou banho de sal neutro quando a qualidade da superf\u00edcie for importante.<\/td><\/tr>\n            <tr><td>Ignorar o pr\u00e9-aquecimento<\/td><td>Maior risco de distor\u00e7\u00e3o ou fissuras<\/td><td>Pr\u00e9-aque\u00e7a a cerca de 650 \u00b0C \/ 1200 \u00b0F antes da austenitiza\u00e7\u00e3o.<\/td><\/tr>\n            <tr><td>M\u00e9todo de t\u00eampera incorreto<\/td><td>Rachaduras, deforma\u00e7\u00f5es ou dureza insuficiente.<\/td><td>Selecione ar ou \u00f3leo de acordo com o tamanho da se\u00e7\u00e3o e a geometria.<\/td><\/tr>\n            <tr><td>Resfriamento muito lento<\/td><td>Resist\u00eancia \u00e0 corros\u00e3o reduzida<\/td><td>Controle o resfriamento em toda a faixa cr\u00edtica.<\/td><\/tr>\n            <tr><td>Retardar a t\u00eampera<\/td><td>risco de fissura\u00e7\u00e3o por t\u00eampera<\/td><td>Tempere logo ap\u00f3s o resfriamento.<\/td><\/tr>\n            <tr><td>Temperando na faixa de perigo<\/td><td>Menor resist\u00eancia ao impacto e \u00e0 corros\u00e3o.<\/td><td>Evite temperaturas entre 427 e 566 \u00b0C (800 e 1050 \u00b0F), a menos que um procedimento qualificado o exija.<\/td><\/tr>\n            <tr><td>Tempera \u00fanica em partes cr\u00edticas<\/td><td>Al\u00edvio do estresse reduzido e estabilidade<\/td><td>Utilize t\u00eampera dupla para pe\u00e7as de precis\u00e3o ou cr\u00edticas.<\/td><\/tr>\n            <tr><td>Buscando apenas a dureza m\u00e1xima<\/td><td>Pe\u00e7as fr\u00e1geis ou desempenho reduzido em rela\u00e7\u00e3o \u00e0 corros\u00e3o<\/td><td>Ajuste a temperatura de t\u00eampera \u00e0 aplica\u00e7\u00e3o.<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>Um erro grave \u00e9 usar t\u00eampera em \u00f3leo para todas as pe\u00e7as. A t\u00eampera em \u00f3leo pode melhorar a resposta ao endurecimento, mas tamb\u00e9m aumenta o risco de distor\u00e7\u00e3o e fissuras. Para pe\u00e7as complexas ou irregulares, a t\u00eampera ao ar costuma ser a op\u00e7\u00e3o mais segura.<\/p>\n      <p>Outro erro comum \u00e9 usar uma temperatura de revenimento alta para melhorar a tenacidade sem considerar a resist\u00eancia \u00e0 corros\u00e3o. Para o a\u00e7o inoxid\u00e1vel 420, o revenimento em alta temperatura pode reduzir a dureza e o desempenho em rela\u00e7\u00e3o \u00e0 corros\u00e3o. Quando se exige alta dureza e resist\u00eancia \u00e0 corros\u00e3o, o revenimento em baixa temperatura geralmente \u00e9 prefer\u00edvel.<\/p>\n      <p>A faixa de risco mais importante situa-se entre 427 e 566 \u00b0C (800 e 1050 \u00b0F). Essa faixa n\u00e3o deve ser usada indiscriminadamente. Se a pe\u00e7a necessitar de maior tenacidade, o processo deve ser projetado para temperaturas de 593 \u00b0C (1100 \u00b0F) ou superiores, tendo em mente que a dureza diminuir\u00e1.<\/p>\n\n      <h2>Diretrizes de tratamento t\u00e9rmico do a\u00e7o inoxid\u00e1vel 420 por aplica\u00e7\u00e3o.<\/h2>\n      <p>O processo b\u00e1sico de endurecimento do a\u00e7o inoxid\u00e1vel 420 \u00e9 semelhante em muitas aplica\u00e7\u00f5es, mas a temperatura de revenimento deve ser ajustada com base no desempenho necess\u00e1rio.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead>\n            <tr><th>Aplicativo<\/th><th>Requisito principal<\/th><th>Diretrizes para o tratamento t\u00e9rmico<\/th><th>Nota pr\u00e1tica<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>Talheres e l\u00e2minas<\/td><td>Dureza e reten\u00e7\u00e3o de fio<\/td><td>Austenitize corretamente, resfrie rapidamente e, em seguida, utilize revenido em baixa temperatura.<\/td><td>Evite temperaturas de t\u00eampera excessivas se for necess\u00e1rio obter l\u00e2minas afiadas.<\/td><\/tr>\n            <tr><td>Instrumentos cir\u00fargicos e odontol\u00f3gicos<\/td><td>Dureza, capacidade de polimento, resist\u00eancia \u00e0 corros\u00e3o<\/td><td>Utilize t\u00eampera a baixa temperatura e boa prote\u00e7\u00e3o de superf\u00edcie.<\/td><td>A qualidade da superf\u00edcie \u00e9 fundamental.<\/td><\/tr>\n            <tr><td>Moldes de pl\u00e1stico<\/td><td>Capacidade de polimento, dureza, resist\u00eancia \u00e0 corros\u00e3o<\/td><td>Revenimento a baixa temperatura, geralmente em torno de 204\u2013250 \u00b0C \/ 400\u2013480 \u00b0F<\/td><td>Evite o revenimento em alta temperatura se a resist\u00eancia \u00e0 corros\u00e3o for importante.<\/td><\/tr>\n            <tr><td>Pe\u00e7as de desgaste<\/td><td>Dureza e resist\u00eancia \u00e0 abras\u00e3o<\/td><td>Endurecer completamente e revenir em uma faixa inferior.<\/td><td>N\u00e3o reduza a dureza a menos que seja necess\u00e1ria tenacidade.<\/td><\/tr>\n            <tr><td>Eixos, engrenagens e roletes<\/td><td>Equil\u00edbrio entre for\u00e7a e resist\u00eancia<\/td><td>Utilize uma temperatura de t\u00eampera espec\u00edfica para a aplica\u00e7\u00e3o.<\/td><td>A dureza m\u00e1xima nem sempre \u00e9 o melhor objetivo.<\/td><\/tr>\n            <tr><td>Molas ou componentes mais resistentes<\/td><td>Resist\u00eancia acima da dureza m\u00e1xima<\/td><td>Pode-se usar uma temperatura de t\u00eampera mais alta.<\/td><td>A dureza ser\u00e1 menor.<\/td><\/tr>\n            <tr><td>pe\u00e7as de precis\u00e3o complexas<\/td><td>Estabilidade dimensional<\/td><td>Pr\u00e9-aque\u00e7a com cuidado, considere o resfriamento ao ar e utilize t\u00eampera dupla.<\/td><td>Evite t\u00eamperas severas quando o risco de fissuras for alto.<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>Para moldes de pl\u00e1stico, o a\u00e7o inoxid\u00e1vel 420 \u00e9 frequentemente escolhido por sua combina\u00e7\u00e3o de dureza, facilidade de polimento e resist\u00eancia \u00e0 corros\u00e3o. Nesse caso, o revenimento a baixa temperatura \u00e9 geralmente preferido. O revenimento a alta temperatura ainda pode produzir propriedades mec\u00e2nicas aceit\u00e1veis, mas pode reduzir a resist\u00eancia \u00e0 corros\u00e3o.<\/p>\n      <p>Para l\u00e2minas e pe\u00e7as de desgaste, a dureza e a reten\u00e7\u00e3o do fio s\u00e3o geralmente os principais objetivos. Temperaturas de revenimento mais baixas s\u00e3o comumente utilizadas. Se a pe\u00e7a lascar ou rachar em servi\u00e7o, a solu\u00e7\u00e3o n\u00e3o \u00e9 simplesmente aumentar a dureza. O m\u00e9todo de t\u00eampera, a temperatura de revenimento, o projeto da pe\u00e7a e a carga de servi\u00e7o devem ser revisados.<\/p>\n      <p>Para eixos, engrenagens, rolos e pe\u00e7as mec\u00e2nicas submetidas a cargas, a dureza m\u00e1xima pode n\u00e3o ser o objetivo ideal. Essas pe\u00e7as podem necessitar de um equil\u00edbrio mais preciso entre dureza e tenacidade. O tratamento t\u00e9rmico deve ser adequado \u00e0s condi\u00e7\u00f5es reais de carga, e n\u00e3o apenas ao valor HRC mais alto poss\u00edvel.<\/p>\n\n      <div class=\"aobo-note-box\">\n        <p><em>A Aobo Steel n\u00e3o oferece servi\u00e7os de t\u00eampera final ou tratamento t\u00e9rmico. Fornecemos a\u00e7o inoxid\u00e1vel 420 para usinagem e posterior tratamento t\u00e9rmico pelo cliente ou por um fornecedor qualificado.<\/em><\/p>\n        <p><em>Os dados sobre tratamento t\u00e9rmico neste guia s\u00e3o fornecidos como refer\u00eancia t\u00e9cnica para clientes, fabricantes de ferramentas e profissionais de tratamento t\u00e9rmico.<\/em><\/p>\n      <\/div>\n    <\/main>\n\n    <section class=\"aobo-final-cta\">\n      <div>\n        <h2>Precisa de a\u00e7o inoxid\u00e1vel 420 para pe\u00e7as endurecidas?<\/h2>\n        <p>A Aobo Steel fornece a\u00e7o inoxid\u00e1vel 420 para moldes, l\u00e2minas, eixos, pe\u00e7as de desgaste e componentes de precis\u00e3o. Envie-nos as dimens\u00f5es, a quantidade e o acabamento superficial desejados para suporte em fornecimento a granel.<\/p>\n      <\/div>\n      <div class=\"aobo-cta-buttons\">\n        <a class=\"aobo-btn aobo-btn-detail\" href=\"https:\/\/aobosteel.com\/pt\/420-stainless-steel\/\">Veja 420 A\u00e7o Inoxid\u00e1vel<\/a>\n        <a class=\"aobo-btn popmake-16052\" href=\"javascript:void(0);\">Enviar consulta<\/a>\n      <\/div>\n    <\/section>\n  <\/div>\n<\/section>\n\n\n\n\n<ul class=\"wp-block-yoast-seo-related-links yoast-seo-related-links\">\n<li><a href=\"https:\/\/aobosteel.com\/pt\/420-stainless-steel\/\">A\u00e7o inoxid\u00e1vel 420 | 1.2083 | 2Cr13<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/pt\/m2-tool-steel\/\">A\u00e7o para ferramentas M2 | 1.3343 | SKH51<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/pt\/o2-tool-steel\/\">A\u00e7o para ferramentas O2 | 1.2842<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/pt\/440c-stainless-steel\/\">Fornecedor de a\u00e7o inoxid\u00e1vel 440C (1.4125 \/ SUS440C) | Fornecimento a granel de barras e chapas redondas<\/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<\/ul>","protected":false},"excerpt":{"rendered":"<p>420 Stainless Steel Heat Treatment Guide 420 Stainless Steel Heat Treatment Guide To heat treat 420 stainless steel, preheat to about 650\u00b0C \/ 1200\u00b0F, then austenitize at 954\u20131010\u00b0C \/ 1750\u20131850\u00b0F, followed by air or oil quenching. After quenching, temper immediately according to the required hardness, toughness, and corrosion resistance. For high-hardness applications, 420 stainless steel [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":15291,"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-15288","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>420 Steel Heat Treatment Guide | Hardening, Quenching &amp; 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For high-hardness applications, 420 stainless steel&hellip;","rttpg_featured_image_url":{"full":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/420-heat-treatment-ad.avif",1254,1254,false],"landscape":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/420-heat-treatment-ad.avif",1254,1254,false],"portraits":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/420-heat-treatment-ad.avif",1254,1254,false],"thumbnail":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/420-heat-treatment-ad-150x150.avif",150,150,true],"medium":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/420-heat-treatment-ad-300x300.avif",300,300,true],"large":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/420-heat-treatment-ad-1024x1024.avif",1024,1024,true],"1536x1536":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/420-heat-treatment-ad.avif",1254,1254,false],"2048x2048":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/420-heat-treatment-ad.avif",1254,1254,false],"trp-custom-language-flag":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/420-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":"420 Stainless Steel Heat Treatment Guide 420 Stainless Steel Heat Treatment Guide To heat treat 420 stainless steel, preheat to about 650\u00b0C \/ 1200\u00b0F, then austenitize at 954\u20131010\u00b0C \/ 1750\u20131850\u00b0F, followed by air or oil quenching. After quenching, temper immediately according to the required hardness, toughness, and corrosion resistance. For high-hardness applications, 420 stainless steel&hellip;","_links":{"self":[{"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/pages\/15288","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=15288"}],"version-history":[{"count":1,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/pages\/15288\/revisions"}],"predecessor-version":[{"id":16087,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/pages\/15288\/revisions\/16087"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/media\/15291"}],"wp:attachment":[{"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/media?parent=15288"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}