{"id":19901,"date":"2026-09-27T03:09:40","date_gmt":"2026-09-26T19:09:40","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=19901"},"modified":"2026-10-16T00:07:43","modified_gmt":"2026-10-15T16:07:43","slug":"m4-tool-steel-heat-treatment","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/m4-tool-steel-heat-treatment\/","title":{"rendered":"Tratamento t\u00e9rmico do a\u00e7o ferramenta M4"},"content":{"rendered":"

Tratamento t\u00e9rmico do a\u00e7o ferramenta M4<\/h1>\n\n\n\n

A composi\u00e7\u00e3o qu\u00edmica, o ciclo de t\u00eampera e a linha de revenimento que a ficha de origem apresenta para o a\u00e7o r\u00e1pido ao molibd\u00eanio M4. Um resumo de refer\u00eancia da pr\u00e1tica publicada e n\u00e3o uma especifica\u00e7\u00e3o da Aobo Steel.<\/p>\n\n\n\n

M4 no grupo dos a\u00e7os r\u00e1pidos ao molibd\u00eanio<\/h2>\n\n\n\n

O M4 situa-se no grupo dos a\u00e7os r\u00e1pidos ao molibd\u00eanio da s\u00e9rie M, e \u00e9 o van\u00e1dio que o distingue do M2 e do M7. A ficha de onde v\u00eam estas tabelas apresenta 4,00% de van\u00e1dio, 1,30% de carbono, 4,50% de molibd\u00eanio e 5,50% de tungst\u00eanio, com cromo a 4,00% e enxofre a 0,27%. O cobalto est\u00e1 listado na ficha sem valor associado. As tr\u00eas tabelas abaixo apresentam o que a ficha apresenta e nada mais, e cada valor de composi\u00e7\u00e3o qu\u00edmica \u00e9 verificado em rela\u00e7\u00e3o \u00e0s faixas que o quadro de composi\u00e7\u00e3o deste site apresenta para o grau.<\/p>\n\n\n\n

A ficha \u00e9 informa\u00e7\u00e3o de refer\u00eancia de oficina e n\u00e3o uma especifica\u00e7\u00e3o. Apresenta uma temperatura de pr\u00e9-aquecimento, uma temperatura de t\u00eampera e dois meios de resfriamento, depois uma tabela de revenimento com um \u00fanico valor de dureza em cada linha e sem faixa de toler\u00e2ncia em nenhum ponto. Uma primeira corrida de pe\u00e7as de um novo lote de a\u00e7o vale a pena ser tratada como um teste antes de o ciclo entrar em produ\u00e7\u00e3o.<\/p>\n\n\n\n

Composi\u00e7\u00e3o qu\u00edmica do M4<\/h2>\n\n\n\n

Elementos listados na ficha de refer\u00eancia, percentual<\/h3>\n\n\n\n
Elemento<\/th>Percentual<\/th><\/tr><\/thead>
Carbono<\/td>1.30<\/td><\/tr>
Manganese<\/td>0.30<\/td><\/tr>
Silicon<\/td>0.30<\/td><\/tr>
Cromo<\/td>4.00<\/td><\/tr>
Molibd\u00eanio<\/td>4.50<\/td><\/tr>
Van\u00e1dio<\/td>4.00<\/td><\/tr>
Tungst\u00eanio<\/td>5.50<\/td><\/tr>
Enxofre<\/td>0.27<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Fonte, informa\u00e7\u00e3o de refer\u00eancia de tratamento t\u00e9rmico para M4, p\u00e1gina impressa 191.<\/em><\/p>\n\n\n\n

A ficha apresenta um valor para cada elemento em vez de uma faixa de especifica\u00e7\u00e3o. O cobalto est\u00e1 listado na ficha sem valor associado, portanto essa linha \u00e9 omitida da tabela em vez de ser apresentada em branco. O enxofre a 0,27% \u00e9 o valor que a ficha apresenta para o grau.<\/em><\/p>\n\n\n\n

Carbono a 1,30% e van\u00e1dio a 4,00% s\u00e3o os dois valores que distinguem o M4 no grupo dos a\u00e7os r\u00e1pidos ao molibd\u00eanio, e a ficha apresenta-os como valores \u00fanicos em vez de faixas. Cada valor da ficha est\u00e1 dentro da faixa que o quadro de composi\u00e7\u00e3o deste site apresenta para o M4, UNS T11304, que vai de 1,25 a 1,40% de carbono, 3,75 a 4,75% de cromo, 4,25 a 5,50% de molibd\u00eanio, 5,25 a 6,50% de tungst\u00eanio e 3,75 a 4,50% de van\u00e1dio. O mesmo quadro indica o van\u00e1dio do M2 em 1,75 a 2,20% e o van\u00e1dio do M7 em 1,75 a 2,25%, portanto os 4,00% desta ficha s\u00e3o cerca do dobro do que esses dois graus de a\u00e7o r\u00e1pido ao molibd\u00eanio cont\u00eam, e o quadro de revenimento deste site lista o tipo do M4 como a\u00e7o r\u00e1pido ao molibd\u00eanio, van\u00e1dio. O enxofre est\u00e1 apresentado na ficha e n\u00e3o no quadro de composi\u00e7\u00e3o, e o cobalto n\u00e3o tem valor associado. Os dados de composi\u00e7\u00e3o na tabela s\u00e3o apenas para refer\u00eancia geral, os valores reais variam por norma, usina e n\u00famero de corrida, portanto confirme os valores com o certificado de ensaio do material da corrida ou consulte a Aobo Steel.<\/p>\n\n\n\n

T\u00eampera do M4<\/h2>\n\n\n\n

Pr\u00e9-aquecimento, temperatura de t\u00eampera e resfriamento<\/h3>\n\n\n\n
Etapa<\/th>M4<\/th><\/tr><\/thead>
Pr\u00e9-aquecimento<\/td>1500 \u00b0F (815 \u00b0C)<\/td><\/tr>
Temperar<\/td>2225 \u00b0F (1220 \u00b0C)<\/td><\/tr>
Meio de t\u00eampera<\/td>T\u00eampera em \u00f3leo ou sal<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Fonte, informa\u00e7\u00e3o de refer\u00eancia de tratamento t\u00e9rmico para M4, p\u00e1gina impressa 191.<\/em><\/p>\n\n\n\n

A ficha apresenta uma temperatura de pr\u00e9-aquecimento, uma temperatura de t\u00eampera e dois meios de resfriamento para o grau, sem condi\u00e7\u00e3o de espessura de se\u00e7\u00e3o associada a nenhum deles, portanto os valores valem para a carga conforme escrito. O quadro de temperaturas de t\u00eampera e revenimento deste site d\u00e1 ao grupo M3 e M4 uma janela de t\u00eampera de 2200 a 2250 \u00b0F (1205 a 1230 \u00b0C) e lista \u00f3leo, ar ou sal como meios de resfriamento, portanto o valor \u00fanico desta ficha est\u00e1 dentro dessa janela e os dois meios que apresenta s\u00e3o dois dos tr\u00eas que o quadro permite.<\/em><\/p>\n\n\n\n

O pr\u00e9-aquecimento de 1500 \u00b0F (815 \u00b0C) est\u00e1 dentro da faixa de pr\u00e9-aquecimento de 1350 a 1550 \u00b0F que o quadro de t\u00eampera e revenimento deste site apresenta para o grupo M3 e M4, e a ficha n\u00e3o apresenta nenhuma condi\u00e7\u00e3o associada, portanto a etapa vale para toda carga. A t\u00eampera ocorre a 2225 \u00b0F (1220 \u00b0C) em \u00f3leo ou sal. O mesmo quadro d\u00e1 ao grupo uma janela de 2200 a 2250 \u00b0F (1205 a 1230 \u00b0C) e lista \u00f3leo, ar ou sal como meios de resfriamento, portanto o valor \u00fanico de t\u00eampera desta ficha est\u00e1 dentro dessa janela e os dois meios que a ficha apresenta s\u00e3o dois dos tr\u00eas que o quadro permite. A ficha n\u00e3o escolhe entre \u00f3leo e sal, portanto essa escolha fica com a oficina e a se\u00e7\u00e3o a ser tratada.<\/p>\n\n\n\n

Resposta ao revenimento do M4<\/h2>\n\n\n\n

Dureza deixada por cada temperatura de revenimento<\/h3>\n\n\n\n
Revenimento, \u00b0F<\/th>\u00b0C<\/th>M4, HRC<\/th><\/tr><\/thead>
Ap\u00f3s a t\u00eampera<\/td>Sem revenimento<\/td>64<\/td><\/tr>
900<\/td>480<\/td>62<\/td><\/tr>
950<\/td>510<\/td>66<\/td><\/tr>
1000<\/td>540<\/td>65<\/td><\/tr>
1050<\/td>565<\/td>65<\/td><\/tr>
1100<\/td>595<\/td>64<\/td><\/tr>
1150<\/td>620<\/td>62<\/td><\/tr>
1200<\/td>650<\/td>58<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Fonte, informa\u00e7\u00e3o de refer\u00eancia de tratamento t\u00e9rmico para M4, p\u00e1gina impressa 191.<\/em><\/p>\n\n\n\n

A ficha apresenta um valor Rockwell C em cada linha. Esta ficha cont\u00e9m um valor na linha ap\u00f3s a t\u00eampera (sem revenimento), 64 HRC, portanto essa linha \u00e9 mostrada sem temperatura de revenimento associada. A linha cai para 62 HRC a 900 \u00b0F (480 \u00b0C) antes de subir ao seu pico de 66 HRC a 950 \u00b0F (510 \u00b0C), e cai para 58 HRC na extremidade de 1200 \u00b0F (650 \u00b0C) da tabela. A ficha n\u00e3o diz nada sobre o n\u00famero de ciclos de revenimento.<\/em><\/p>\n\n\n\n

Esta ficha cont\u00e9m um valor na linha ap\u00f3s a t\u00eampera (sem revenimento), 64 HRC, portanto a tabela come\u00e7a a\u00ed. A linha cai para 62 HRC a 900 \u00b0F (480 \u00b0C), sobe ao seu pico de 66 HRC a 950 \u00b0F (510 \u00b0C), mant\u00e9m 65 HRC em 1000 e 1050 \u00b0F (540 e 565 \u00b0C), e cai para 58 HRC a 1200 \u00b0F (650 \u00b0C), portanto a resposta atinge o pico um pouco acima de 950 \u00b0F e n\u00e3o volta a subir no topo da tabela. Na faixa de 1000 a 1100 \u00b0F onde o quadro de revenimento deste site recomenda revenir o M4, esse quadro lista 66 a 61 HRC e a ficha apresenta 65, 65 e 64, dentro dessa faixa. A ficha n\u00e3o diz nada sobre o n\u00famero de ciclos de revenimento, portanto trate a linha como a resposta do grau e defina os ciclos com o seu tratador t\u00e9rmico antes de as pe\u00e7as entrarem em servi\u00e7o.<\/p>\n\n\n\n

\n

Tratamento t\u00e9rmico do a\u00e7o ferramenta M4, PDF para impress\u00e3o<\/strong><\/p>\n\n

A composi\u00e7\u00e3o qu\u00edmica, o ciclo de t\u00eampera e a resposta ao revenimento do M4 desta p\u00e1gina em um \u00fanico PDF, com os nossos dados de contato.<\/p>\n\n

\n
Baixar PDF, 375 KB<\/a><\/div>\n\n<\/div>\n<\/div>\n\n\n\n

Dados de refer\u00eancia relacionados<\/h2>\n\n\n\n

O grau com o qual o M4 compartilha o seu grupo est\u00e1 na p\u00e1gina de tratamento t\u00e9rmico do a\u00e7o ferramenta M3<\/a>, e a dureza de trabalho na qual o grupo est\u00e1 listado est\u00e1 na tabela de propriedades do a\u00e7o ferramenta<\/a>. As faixas de composi\u00e7\u00e3o qu\u00edmica de toda a s\u00e9rie M est\u00e3o na Tabela de composi\u00e7\u00e3o de a\u00e7os para ferramentas<\/a> e as temperaturas de t\u00eampera e revenimento na tabela de t\u00eampera e revenimento de a\u00e7o para ferramentas<\/a>. A dureza que o M4 mant\u00e9m quando est\u00e1 quente est\u00e1 na tabela de dureza a quente do a\u00e7o ferramenta<\/a>, os dados de corte para o grupo est\u00e3o na p\u00e1gina de velocidades e avan\u00e7os de corte para a\u00e7os ferramenta<\/a>, e a faixa de fornecimento est\u00e1 na p\u00e1gina de a\u00e7os r\u00e1pidos<\/a>.<\/p>\n\n\n\n

Dados de refer\u00eancia compilados de Heat Treatment, Selection, and Application of Tool Steels (William E. Bryson, segunda edi\u00e7\u00e3o, Hanser). A composi\u00e7\u00e3o qu\u00edmica, o ciclo de t\u00eampera e a resposta ao revenimento do M4 v\u00eam da informa\u00e7\u00e3o de refer\u00eancia de tratamento t\u00e9rmico na p\u00e1gina impressa 191.<\/p>","protected":false},"excerpt":{"rendered":"

M4 Tool Steel Heat Treatment The chemistry, the hardening cycle and the tempering line the source card prints for M4 molybdenum high speed steel. A reference summary of published practice and not an Aobo Steel specification. M4 in the molybdenum high speed group M4 sits in the molybdenum high speed group of the M series, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"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":"","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":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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Data<\/title>\n<meta name=\"description\" content=\"Hardening temperature, oil or salt quench and the tempering response of M4 molybdenum high speed steel, with the chemistry and hardness of each temper.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/aobosteel.com\/pt\/m4-tool-steel-heat-treatment\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"M4 Tool Steel Heat Treatment\" \/>\n<meta property=\"og:description\" content=\"Hardening temperature, oil or salt quench and the tempering response of M4 molybdenum high speed steel, with the chemistry and hardness of each temper.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/aobosteel.com\/pt\/m4-tool-steel-heat-treatment\/\" \/>\n<meta property=\"og:site_name\" content=\"AoboSteel\" \/>\n<meta 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