{"id":825,"date":"2023-01-02T10:28:00","date_gmt":"2023-01-02T10:28:00","guid":{"rendered":"https:\/\/waldunsteel.com\/?post_type=portfolio&#038;p=825"},"modified":"2023-02-14T12:17:46","modified_gmt":"2023-02-14T12:17:46","slug":"aco-4340","status":"publish","type":"portfolio","link":"https:\/\/waldunsteel.com\/pt\/products\/4340-steel\/","title":{"rendered":"Liga de A\u00e7o AISI 4340 \u2013 ASTM A29"},"content":{"rendered":"<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-262tl-164906a3659821594bc460287a72fd02\">\n.flex_column.av-262tl-164906a3659821594bc460287a72fd02{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-262tl-164906a3659821594bc460287a72fd02 av_two_third  avia-builder-el-0  el_before_av_one_third  avia-builder-el-first  first flex_column_div av-zero-column-padding'     ><section  class='av_textblock_section av-kmag0pxk-3229ee3744b77168ca05d3004bec2d26'  ><div class='avia_textblock' ><h1 style=\"text-align: center;\"><strong><b>Liga de A\u00e7o AISI 4340 \u2013 ASTM A29<\/b><\/strong><\/h1>\n<p><img decoding=\"async\" class=\"wp-image-827 size-full aligncenter\" src=\"https:\/\/waldunsteel.com\/wp-content\/uploads\/2021\/03\/AISI-4340-steel-round-bar.jpg\" alt=\"Barra redonda de a\u00e7o AISI-4340\" width=\"700\" height=\"525\" srcset=\"https:\/\/waldunsteel.com\/wp-content\/uploads\/2021\/03\/AISI-4340-steel-round-bar.jpg 700w, https:\/\/waldunsteel.com\/wp-content\/uploads\/2021\/03\/AISI-4340-steel-round-bar-300x225.jpg 300w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/p>\n<p><strong><b>WALDUN \u00e9 um bom chin\u00eas <\/b><\/strong><strong><b>Fabricante e exportador de a\u00e7o AISI 4340<\/b><\/strong><strong><b>. Voc\u00ea pode ter <\/b><\/strong><strong><b>fornecido com redondo, quadrado, plano, bloco e eixo, etc.<\/b><\/strong><strong><b>\u00a0de WALDUN<\/b><\/strong><strong><b>.<\/b><\/strong><\/p>\n<p>O a\u00e7o AISI 4340 \u00e9 definido como um a\u00e7o trat\u00e1vel termicamente e de baixa liga que tem 0,8% Cr, 0,2% Mo e 1,8% Ni como elementos de liga de refor\u00e7o. Em compara\u00e7\u00e3o com o AISI 4140, possui maior resist\u00eancia e tenacidade, al\u00e9m de muito boa resist\u00eancia \u00e0 fadiga , resist\u00eancia ao desgaste e resist\u00eancia \u00e0 corros\u00e3o atmosf\u00e9rica. O a\u00e7o AISI 4340 \u00e9 geralmente fornecido em condi\u00e7\u00e3o endurecida e revenida com a faixa de tra\u00e7\u00e3o de 930 - 1080 Mpa, dureza 280-320HB. Pr\u00e9-endurecido e revenido 4340 pode ser posteriormente endurecido superficialmente por chama ou endurecimento por indu\u00e7\u00e3o e por nitreta\u00e7\u00e3o.<\/p>\n<p>O a\u00e7o 4340 pode ser usado para os requisitos de boa tenacidade, alta resist\u00eancia, bem como tamanho grande de pe\u00e7as temperadas importantes, como eixo de alta carga de maquin\u00e1rio pesado, di\u00e2metro maior que 250 mm eixo de turbina de ware, eixo de rotor de helic\u00f3ptero, eixo de turbina de motor turbojato, l\u00e2mina, pe\u00e7as de transmiss\u00e3o de alta carga, fechos de virabrequim. Engrenagens, etc .; O a\u00e7o 4340 tamb\u00e9m pode ser usado para temperaturas operacionais de mais de 400 \u2103, eixo do rotor e l\u00e2mina, etc .; tamb\u00e9m pode ser tratamento de nitreta\u00e7\u00e3o, usado para fabricar requisitos de desempenho especiais de pe\u00e7as importantes, ap\u00f3s revenido a baixa temperatura ou t\u00eampera isot\u00e9rmica pode ser usado para a\u00e7o de ultra-alta resist\u00eancia.<\/p>\n<h2><strong><b>4340 Steel <\/b><\/strong><strong><b>Forma, tamanho e toler\u00e2ncia do suprimento<\/b><\/strong><\/h2>\n<p>O a\u00e7o 4340 \u00e9 uma liga de alta resist\u00eancia muito utilizada na ind\u00fastria aeroespacial. Oferece excelente tenacidade e resist\u00eancia, tornando-o ideal para aplica\u00e7\u00f5es onde altos n\u00edveis de estresse s\u00e3o uma preocupa\u00e7\u00e3o. O a\u00e7o 4340 est\u00e1 dispon\u00edvel em uma variedade de formas, tamanhos e toler\u00e2ncias diferentes. Como resultado, pode ser facilmente adaptado para atender \u00e0s necessidades espec\u00edficas de qualquer projeto. O a\u00e7o 4340 \u00e9 uma excelente escolha para qualquer aplica\u00e7\u00e3o onde a resist\u00eancia e a durabilidade sejam uma prioridade.<\/p>\n<table>\n<tbody>\n<tr>\n<td>Formul\u00e1rio de Fornecimento<\/td>\n<td>Tamanho (mm)<\/td>\n<td>Processar<\/td>\n<td colspan=\"2\">Toler\u00e2ncia<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"5\">Redondo<\/td>\n<td>\u03a66-\u03a6100<\/td>\n<td>Desenho frio<\/td>\n<td>Preto brilhante<\/td>\n<td>Melhor H11<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\">\u03a616-\u03a6350<\/td>\n<td rowspan=\"2\">Laminados a quente<\/td>\n<td>Preto<\/td>\n<td>-0 \/ + 1mm<\/td>\n<\/tr>\n<tr>\n<td>Descascado \/ mo\u00eddo<\/td>\n<td>Melhor H11<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\">\u03a690-\u03a61000<\/td>\n<td rowspan=\"2\">Forjado a Quente<\/td>\n<td>Preto<\/td>\n<td>-0 \/ + 5mm<\/td>\n<\/tr>\n<tr>\n<td>Rough Turned<\/td>\n<td>-0 \/ + 3mm<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\">Plano \/ Quadrado \/ Bloco<\/td>\n<td>Espessura: 120-800<\/td>\n<td rowspan=\"2\">Forjado a Quente<\/td>\n<td>Preto<\/td>\n<td>-0 \/ + 8 mm<\/td>\n<\/tr>\n<tr>\n<td>Largura: 120-1500<\/td>\n<td>Rough Machined<\/td>\n<td>-0 \/ + 3mm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Observa\u00e7\u00e3o: a toler\u00e2ncia pode ser personalizada de acordo com as solicita\u00e7\u00f5es<\/p>\n<h2><strong><b>4340 Steel <\/b><\/strong><strong><b>Composi\u00e7\u00e3o qu\u00edmica<\/b><\/strong><\/h2>\n<p>O a\u00e7o 4340 \u00e9 um a\u00e7o de liga de cromo-molibd\u00eanio que oferece um excelente equil\u00edbrio entre for\u00e7a, tenacidade e resist\u00eancia ao desgaste. O nome 4340 vem do fato de possuir composi\u00e7\u00e3o qu\u00edmica do a\u00e7o 4340. 4340 tem um teor de carbono de 0,38-0,43%, um teor de mangan\u00eas de 0,60-0,80%, um teor de cromo de 0,80-1,10%, um teor de molibd\u00eanio de 0,15-0,25%, um teor de sil\u00edcio de 0,15-0,35%, um teor de enxofre de 0,040% e um teor de f\u00f3sforo de 0,040%. 4340 tamb\u00e9m cont\u00e9m vest\u00edgios de outros elementos, incluindo cobre, n\u00edquel e alum\u00ednio. O a\u00e7o 4340 oferece um excelente equil\u00edbrio entre resist\u00eancia e tenacidade e \u00e9 usado em uma variedade de aplica\u00e7\u00f5es, incluindo engrenagens, eixos, parafusos e prisioneiros. 4340 tamb\u00e9m \u00e9 frequentemente usado na ind\u00fastria aeroespacial para trem de pouso, l\u00e2minas de turbina e outras aplica\u00e7\u00f5es de alta resist\u00eancia.<\/p>\n<table>\n<tbody>\n<tr>\n<td>Padr\u00e3o<\/td>\n<td>Grau<\/td>\n<td>C<\/td>\n<td>Si<\/td>\n<td>Mn<\/td>\n<td>P<\/td>\n<td>S<\/td>\n<td>Cr<\/td>\n<td>Ni<\/td>\n<td>Mo<\/td>\n<\/tr>\n<tr>\n<td>ASTM A29<\/td>\n<td>4340<\/td>\n<td>0,38-0,43<\/td>\n<td>0,15-0,35<\/td>\n<td>0,6-0,8<\/td>\n<td>\u2264 0,035<\/td>\n<td>\u2264 0,04<\/td>\n<td>0,7-0,9<\/td>\n<td>1,65-2,0<\/td>\n<td>0,2-0,3<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\">EN10250<\/td>\n<td>36CrNiMo4<\/td>\n<td rowspan=\"2\">0,32-0,4<\/td>\n<td rowspan=\"2\">\u2264 0,4<\/td>\n<td rowspan=\"2\">0,5-0,8<\/td>\n<td rowspan=\"2\">\u2264 0,035<\/td>\n<td rowspan=\"2\">\u2264 0,035<\/td>\n<td rowspan=\"2\">0,9-1,2<\/td>\n<td rowspan=\"2\">0,90-1,2<\/td>\n<td rowspan=\"2\">0,15-0,3<\/td>\n<\/tr>\n<tr>\n<td>1.6511<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\">BS 970<\/td>\n<td>EN24<\/td>\n<td rowspan=\"2\">0,36-0,44<\/td>\n<td rowspan=\"2\">0,1-0,4<\/td>\n<td rowspan=\"2\">0,45-0,7<\/td>\n<td rowspan=\"2\">\u2264 0,035<\/td>\n<td rowspan=\"2\">\u2264 0,04<\/td>\n<td rowspan=\"2\">1,0-1,4<\/td>\n<td rowspan=\"2\">1,3-1,7<\/td>\n<td rowspan=\"2\">0,2-0,35<\/td>\n<\/tr>\n<tr>\n<td>817M40<\/td>\n<\/tr>\n<tr>\n<td>JIS G4103<\/td>\n<td>SNCM439<\/td>\n<td>0,36-0,43<\/td>\n<td>0,15-0,35<\/td>\n<td>0,6-0,9<\/td>\n<td>\u2264 0,03<\/td>\n<td>\u2264 0,03<\/td>\n<td>0,6-1,0<\/td>\n<td>1,6-2,0<\/td>\n<td>0,15-0,3<\/td>\n<\/tr>\n<tr>\n<td>GB 3077<\/td>\n<td>40CrNiMoA<\/td>\n<td>0,37-0,44<\/td>\n<td>0,17-0,37<\/td>\n<td>0,5-0,8<\/td>\n<td>\u2264 0,025<\/td>\n<td>\u2264 0,025<\/td>\n<td>0,6-0,9<\/td>\n<td>1,25-1,65<\/td>\n<td>0,15-0,25<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><strong><b>4340 Steel <\/b><\/strong><strong><b>Propriedade f\u00edsica<\/b><\/strong><\/h2>\n<p>Os a\u00e7os 4340 s\u00e3o a\u00e7os de liga de n\u00edquel-cromo-molibd\u00eanio de m\u00e9dio carbono. Esta liga \u00e9 forjada a uma temperatura inicial de cerca de 2250\u02daF (1230\u02daC). O a\u00e7o 4340 possui excelente resist\u00eancia a choques e impactos, bem como resist\u00eancia \u00e0 fadiga, tenacidade e ductilidade. 4340 pode ganhar alta resist\u00eancia por tratamento t\u00e9rmico. E o 4340 \u00e9 conhecido por sua capacidade de suportar cargas pesadas em temperaturas elevadas. 4340 tamb\u00e9m possui boa usinabilidade e soldabilidade. Os a\u00e7os de liga 4340 s\u00e3o amplamente utilizados em trens de pouso de aeronaves devido \u00e0 sua resist\u00eancia e tenacidade ultra-alta. O 4340 tamb\u00e9m \u00e9 frequentemente usado na produ\u00e7\u00e3o de carros de corrida devido \u00e0 sua alta rela\u00e7\u00e3o resist\u00eancia\/peso. 4340 pode ser nitretado para dar uma caixa de superf\u00edcie dura com um n\u00facleo resistente. 4340 tamb\u00e9m pode ser endurecido por precipita\u00e7\u00e3o para atingir uma variedade de resist\u00eancias, mantendo boa tenacidade e ductilidade. 4340 encontra aplica\u00e7\u00f5es em uma ampla variedade de ind\u00fastrias, incluindo os setores automotivo, aeroespacial e de energia. 4340 est\u00e1 dispon\u00edvel em formul\u00e1rios padr\u00e3o e processados.<\/p>\n<table>\n<tbody>\n<tr>\n<td>Densidade g \/ cm3<\/td>\n<td colspan=\"5\">7.85<\/td>\n<\/tr>\n<tr>\n<td>Ponto de fus\u00e3o \u00b0 C<\/td>\n<td colspan=\"5\">1427<\/td>\n<\/tr>\n<tr>\n<td>Coeficiente de Poisson<\/td>\n<td colspan=\"5\">0,27-0,30<\/td>\n<\/tr>\n<tr>\n<td>Usinabilidade (AISI 1212 como 100% usinabilidade)<\/td>\n<td colspan=\"5\">50%<\/td>\n<\/tr>\n<tr>\n<td>Coeficiente de expans\u00e3o t\u00e9rmica \u00b5m \/ m \u00b0 C<\/td>\n<td colspan=\"5\">12.5<\/td>\n<\/tr>\n<tr>\n<td>Condutividade t\u00e9rmica W \/ (mK)<\/td>\n<td colspan=\"5\">44.5<\/td>\n<\/tr>\n<tr>\n<td>M\u00f3dulo de elasticidade 10 ^ 3 N \/ mm ^ 2<\/td>\n<td colspan=\"5\">210<\/td>\n<\/tr>\n<tr>\n<td>Resistividade el\u00e9trica Ohm.mm2 \/ m<\/td>\n<td colspan=\"5\">0.19<\/td>\n<\/tr>\n<tr>\n<td>Capacidade de calor espec\u00edfico J \/ (kg.K)<\/td>\n<td colspan=\"5\">460<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\">M\u00f3dulo de elasticidade 10 ^ 3 N \/ mm2<\/td>\n<td>100 \u2103<\/td>\n<td>200 \u2103<\/td>\n<td>300 \u2103<\/td>\n<td>400 \u2103<\/td>\n<td>500 \u2103<\/td>\n<\/tr>\n<tr>\n<td>205<\/td>\n<td>195<\/td>\n<td>185<\/td>\n<td>175<\/td>\n<td>165<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\">Expans\u00e3o t\u00e9rmica 10 ^ 6 m \/ (mK)<\/td>\n<td>100 \u2103<\/td>\n<td>200 \u2103<\/td>\n<td>300 \u2103<\/td>\n<td>400 \u2103<\/td>\n<td>500 \u2103<\/td>\n<\/tr>\n<tr>\n<td>11.1<\/td>\n<td>12.1<\/td>\n<td>12.9<\/td>\n<td>13.5<\/td>\n<td>13.9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><strong><b>4340 Steel <\/b><\/strong><strong><b>Propriedade mec\u00e2nica<\/b><\/strong><\/h2>\n<p>O a\u00e7o 4340 \u00e9 um a\u00e7o de liga de cromo-molibd\u00eanio que oferece uma combina\u00e7\u00e3o ideal de resist\u00eancia, tenacidade, resist\u00eancia ao desgaste e resist\u00eancia \u00e0 corros\u00e3o. As propriedades que tornam o a\u00e7o 4340 uma excelente escolha para aplica\u00e7\u00f5es estruturais incluem boa ductilidade, soldabilidade e usinabilidade. A alta condutividade t\u00e9rmica do a\u00e7o 4340 tamb\u00e9m \u00e9 importante para aplica\u00e7\u00f5es aeroespaciais. O a\u00e7o de liga 4340 \u00e9 tratado termicamente com altos n\u00edveis de resist\u00eancia e \u00e9 frequentemente usado em aeronaves e motores de turbinas a g\u00e1s industriais. Os a\u00e7os de liga 4340 podem ser encomendados com uma ampla variedade de tratamentos t\u00e9rmicos, incluindo normalizado, recozido, pr\u00e9-endurecido, temperado e revenido. O a\u00e7o 4340 tamb\u00e9m pode ser nitretado para propriedades de desgaste e dureza superficial. Outras aplica\u00e7\u00f5es importantes para o a\u00e7o liga 4340 incluem pe\u00e7as forjadas para pe\u00e7as de aeronaves e componentes de trem de for\u00e7a; an\u00e9is laminados sem costura; veios; coli; hidr\u00e1ulica; engrenagens; rodas dentadas; hastes de v\u00e1lvulas; porta-ferramentas; buchas; hastes de \u00eambolo; fusos; parafusos de esfera; parafusos de chumbo; eixos da bomba e sedes das engrenagens. Os a\u00e7os de liga 4340 est\u00e3o dispon\u00edveis em v\u00e1rios tamanhos padr\u00e3o e formas de estoque, como barras redondas, planas, quadradas, tiras e chapas.<\/p>\n<table>\n<tbody>\n<tr>\n<td>Condi\u00e7\u00e3o Mec\u00e2nica<\/td>\n<td>T<\/td>\n<td>voc\u00ea<\/td>\n<td>V<\/td>\n<td>C<\/td>\n<td>X<\/td>\n<td>Y<\/td>\n<td>Z<\/td>\n<\/tr>\n<tr>\n<td>Se\u00e7\u00e3o de decis\u00e3o (mm)<\/td>\n<td>150<\/td>\n<td>100<\/td>\n<td>63<\/td>\n<td>30<\/td>\n<td>30<\/td>\n<td>30<\/td>\n<td>30<\/td>\n<\/tr>\n<tr>\n<td>Resist\u00eancia \u00e0 tra\u00e7\u00e3o Mpa<\/td>\n<td>850-1000<\/td>\n<td>930-1080<\/td>\n<td>1000-1150<\/td>\n<td>1080-1230<\/td>\n<td>1150-1300<\/td>\n<td>1230-1380<\/td>\n<td>&gt;1550<\/td>\n<\/tr>\n<tr>\n<td>For\u00e7a de rendimento, Mpa<\/td>\n<td>\u2265665<\/td>\n<td>\u2265740<\/td>\n<td>\u2265835<\/td>\n<td>\u2265925<\/td>\n<td>\u22651005<\/td>\n<td>\u22651080<\/td>\n<td>\u22651125<\/td>\n<\/tr>\n<tr>\n<td>Alongamento %<\/td>\n<td>\u226513<\/td>\n<td>\u226512<\/td>\n<td>\u226512<\/td>\n<td>\u226511<\/td>\n<td>\u226510<\/td>\n<td>\u226510<\/td>\n<td>\u22655<\/td>\n<\/tr>\n<tr>\n<td>Izod Impact J<\/td>\n<td>\u226554<\/td>\n<td>\u226547<\/td>\n<td>\u226547<\/td>\n<td>\u226541<\/td>\n<td>\u226534<\/td>\n<td>\u226524<\/td>\n<td>\u226510<\/td>\n<\/tr>\n<tr>\n<td>Charpy Impact J<\/td>\n<td>\u226550<\/td>\n<td>\u226542<\/td>\n<td>\u226542<\/td>\n<td>\u226535<\/td>\n<td>\u226528<\/td>\n<td>\u226520<\/td>\n<td>\u22659<\/td>\n<\/tr>\n<tr>\n<td>Dureza Brinell HB<\/td>\n<td>248-302<\/td>\n<td>269-331<\/td>\n<td>293-352<\/td>\n<td>311-375<\/td>\n<td>341-401<\/td>\n<td>363-429<\/td>\n<td>&gt;444<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><strong><b>4340 Steel <\/b><\/strong><strong><b>For\u00e7a de alta temperatura<\/b><\/strong><\/h2>\n<table>\n<tbody>\n<tr>\n<td colspan=\"8\">Para forjados pesados temperados e temperados<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\">Di\u00e2metro mm<\/td>\n<td colspan=\"7\">For\u00e7a de escoamento MPa<\/td>\n<\/tr>\n<tr>\n<td>20 \u2103<\/td>\n<td>100 \u2103<\/td>\n<td>200 \u2103<\/td>\n<td>250 \u2103<\/td>\n<td>300 \u2103<\/td>\n<td>350 \u2103<\/td>\n<td>400 \u2103<\/td>\n<\/tr>\n<tr>\n<td>\u2264250<\/td>\n<td>590<\/td>\n<td>549<\/td>\n<td>510<\/td>\n<td>481<\/td>\n<td>441<\/td>\n<td>412<\/td>\n<td>371<\/td>\n<\/tr>\n<tr>\n<td>250-500<\/td>\n<td>540<\/td>\n<td>505<\/td>\n<td>471<\/td>\n<td>451<\/td>\n<td>412<\/td>\n<td>383<\/td>\n<td>353<\/td>\n<\/tr>\n<tr>\n<td>500-750<\/td>\n<td>490<\/td>\n<td>466<\/td>\n<td>441<\/td>\n<td>422<\/td>\n<td>392<\/td>\n<td>363<\/td>\n<td>343<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><strong><b>4340 Steel <\/b><\/strong><strong><b>Forjamento<\/b><\/strong><\/h2>\n<p>A temperatura de forjamento deve ser realizada entre 1150 \u2103 -1200 \u2103, Quanto mais baixa a temperatura de finaliza\u00e7\u00e3o do forjamento, mais fino \u00e9 o tamanho do gr\u00e3o. Mantenha o tempo adequado para que o a\u00e7o seja completamente aquecido antes da forja, mas n\u00e3o forje abaixo da temperatura m\u00ednima de forjamento 850 \u00b0 C. O AISI 4340 possui boas caracter\u00edsticas de forjamento, mas a trinca ocorre facilmente quando ocorre um resfriamento inadequado ap\u00f3s o forjamento, portanto deve ser resfriado o mais lentamente poss\u00edvel no ar parado ou na areia ap\u00f3s o forjamento.<\/p>\n<h2><strong><b>4340 Steel <\/b><\/strong><strong><b>Normalizando<\/b><\/strong><\/h2>\n<p>A normaliza\u00e7\u00e3o \u00e9 usada para refinar a estrutura de forjados que podem ter resfriado de maneira n\u00e3o uniforme ap\u00f3s o forjamento e considerada como um tratamento de condicionamento antes do tratamento t\u00e9rmico final. A normaliza\u00e7\u00e3o da temperatura para o a\u00e7o AISI 4340 deve ser realizada entre 850 \u2103 -880 \u2103. mantenha o tempo adequado para que o a\u00e7o seja totalmente aquecido para completar a transforma\u00e7\u00e3o da ferrita em austenita. Resfrie ao ar livre.<\/p>\n<h2><strong><b>4340 Steel <\/b><\/strong><strong><b>anelamento<\/b><\/strong><\/h2>\n<p>O recozimento completo \u00e9 recomendado para AISI 4340 antes da usinagem, AISI 4340 deve ser realizado a uma temperatura nominal de 830 \u2103 -850 \u2103, mantenha o tempo adequado para que o a\u00e7o seja totalmente aquecido e, em seguida, resfrie o forno a 610 \u2103 a uma taxa de 11 \u2103 por hora, finalmente resfriamento de ar.<\/p>\n<h2><strong><b>4340 Steel <\/b><\/strong><strong><b>Endurecimento<\/b><\/strong><\/h2>\n<p>Este tratamento t\u00e9rmico obter\u00e1 a estrutura de martensita ap\u00f3s o resfriamento. Ele aumentar\u00e1 a dureza e a resist\u00eancia da superf\u00edcie. AAISI 4340 deve ser realizada entre 830 \u2103 -865 \u2103, mantenha o tempo adequado para que o a\u00e7o seja totalmente aquecido, deixe de molho por 10-15 minutos por Se\u00e7\u00e3o de 25 mm, \u00e9 recomendada a t\u00eampera em \u00f3leo. O temperamento deve ser seguido imediatamente ap\u00f3s a t\u00eampera.<\/p>\n<h2><strong><b>4340 Steel <\/b><\/strong><strong><b>Temperamento<\/b><\/strong><\/h2>\n<p>O a\u00e7o de liga AISI 4340 deve estar na condi\u00e7\u00e3o de tratado termicamente ou normalizado e tratado termicamente antes do revenido.<strong><b>\u00a0<\/b><\/strong>geralmente \u00e9 realizada para aliviar as tens\u00f5es do processo de endurecimento, mas principalmente para obter a dureza e as propriedades mec\u00e2nicas necess\u00e1rias. A temperatura de t\u00eampera real ser\u00e1 escolhida para atender \u00e0s propriedades exigidas. Geralmente \u00e9 realizada a 450 \u2103 - 660 \u2103, mantenha at\u00e9 que a temperatura esteja uniforme em toda a se\u00e7\u00e3o, deixe de molho por 1 hora a cada 25 mm de se\u00e7\u00e3o e resfrie em ar parado O revenido entre 250 \u2103 -450 \u2103 n\u00e3o \u00e9 evitado, pois o revenido dentro desta faixa reduzir\u00e1 seriamente o valor do impacto, resultando em fragilidade do revenido.<\/p>\n<h2><strong><b>4340 Steel <\/b><\/strong><strong><b>Inscri\u00e7\u00e3o<\/b><\/strong><\/h2>\n<p>O AISI 4340 \u00e9 frequentemente usado em prefer\u00eancia ao AISI 4140 nos n\u00edveis de resist\u00eancia mais altos por causa de sua melhor temperabilidade e resist\u00eancia ao impacto CVN aprimorada.<\/p>\n<p>As aplica\u00e7\u00f5es t\u00edpicas incluem: Eixos refor\u00e7ados, eixos, engrenagens refor\u00e7adas, fusos, pinos, prisioneiros, pin\u00e7as, parafusos, acoplamentos, rodas dentadas, pinh\u00f5es, barras de tor\u00e7\u00e3o, bielas, p\u00e9s de cabra, pe\u00e7as de transporte, hidr\u00e1ulica forjada, virabrequins de a\u00e7o forjado etc.<\/p>\n<\/div><\/section><br \/>\n<div  class='hr av-btzih-2bb6995d020de591c153deab87cb12b0 hr-default  avia-builder-el-2  el_after_av_textblock  el_before_av_portfolio  avia-builder-el-last'><span class='hr-inner'><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n<div  id=\"av-sc-portfolio-1\"  class=\"av-portfolio-grid-sorting-container\"><div class='sort_width_container  av-sort-yes' data-portfolio-id='1' ><div id='js_sort_items' ><div class='sort_by_cat hidden'><a href=\"#\" data-filter=\"all_sort\" class=\"all_sort_button active_sort\"><span class=\"inner_sort_button\"><span>Tudo<\/span><small class=\"av-cat-count\"> 15 <\/small><\/span><\/a><span class=\"text-sep alloysteel_sort_sep\">\/<\/span><a href=\"#\" data-filter=\"alloysteel_sort\" class=\"alloysteel_sort_button\" ><span class=\"inner_sort_button\"><span>Liga de a\u00e7o<\/span><small class=\"av-cat-count\"> 15 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class='grid-entry flex_column isotope-item all_sort no_margin post-entry post-entry-1745 grid-entry-overview grid-loop-15 grid-parity-odd  post-entry-last  alloysteel_sort  av_one_third  default_av_fullwidth'><article class='main_color inner-entry' ><a href=\"https:\/\/waldunsteel.com\/pt\/products\/aisi-8630-alloy-steel\/\" title='Liga de a\u00e7o AISI 8630'  data-rel='grid-1' class='grid-image avia-hover-fx'> <img decoding=\"async\" fetchpriority=\"high\" width=\"260\" height=\"185\" src=\"https:\/\/waldunsteel.com\/wp-content\/uploads\/2021\/07\/AISI-8630-Alloy-Steel-260x185.jpg\" class=\"wp-image-1746 avia-img-lazy-loading-not-1746 attachment-portfolio_small size-portfolio_small wp-post-image\" alt=\"Liga de a\u00e7o AISI 8630\" srcset=\"https:\/\/waldunsteel.com\/wp-content\/uploads\/2021\/07\/AISI-8630-Alloy-Steel-260x185.jpg 260w, https:\/\/waldunsteel.com\/wp-content\/uploads\/2021\/07\/AISI-8630-Alloy-Steel-16x12.jpg 16w\" sizes=\"(max-width: 260px) 100vw, 260px\" \/><\/a><div class='grid-content'><div class='avia-arrow'><\/div><header class=\"entry-content-header\" aria-label=\"Portf\u00f3lio: A\u00e7o Liga AISI 8630\"><h3 class='grid-entry-title entry-title' ><a href='https:\/\/waldunsteel.com\/pt\/products\/aisi-8630-alloy-steel\/' title='Liga de a\u00e7o AISI 8630'>Liga de a\u00e7o AISI 8630<\/a><\/h3><\/header><\/div><footer class=\"entry-footer\"><\/footer><\/article><\/div><\/div><\/div>   <!--   class=\"av-portfolio-grid-sorting-container\"  --><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-ecppt-7198ed60296024a07d4a2df4f76d0b56\">\n.flex_column.av-ecppt-7198ed60296024a07d4a2df4f76d0b56{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-ecppt-7198ed60296024a07d4a2df4f76d0b56 av_one_third  avia-builder-el-4  el_after_av_two_third  avia-builder-el-last  flex_column_div av-zero-column-padding'     ><p><section  class='av_textblock_section av-kmafxtyn-4fbd8ebaca1b593fc1f2592b5f5ca2db'  ><div class='avia_textblock' >\n<\/div><\/section><br \/>\n<div  class='avia-builder-widget-area clearfix  avia-builder-el-6  el_after_av_textblock  avia-builder-el-last'><section id=\"portfoliobox-2\" class=\"widget clearfix avia-widget-container newsbox\"><h3 class=\"widgettitle\">Produtos Mais recentes<\/h3><ul class=\"news-wrap image_size_widget\"><li class=\"news-content post-format-standard\"><div class=\"news-link\"><a class='news-thumb' title=\"Leia: A\u00e7o 60CrMoV18-5\" href=\"https:\/\/waldunsteel.com\/pt\/products\/60crmov18-5-steel\/\"><img decoding=\"async\" fetchpriority=\"high\" width=\"36\" height=\"36\" src=\"https:\/\/waldunsteel.com\/wp-content\/uploads\/2024\/01\/1.2358-36x36.jpg\" class=\"wp-image-2212 avia-img-lazy-loading-not-2212 attachment-widget size-widget wp-post-image\" alt=\"1.2358\" srcset=\"https:\/\/waldunsteel.com\/wp-content\/uploads\/2024\/01\/1.2358-36x36.jpg 36w, https:\/\/waldunsteel.com\/wp-content\/uploads\/2024\/01\/1.2358-300x300.jpg 300w, https:\/\/waldunsteel.com\/wp-content\/uploads\/2024\/01\/1.2358-80x80.jpg 80w, https:\/\/waldunsteel.com\/wp-content\/uploads\/2024\/01\/1.2358-12x12.jpg 12w, https:\/\/waldunsteel.com\/wp-content\/uploads\/2024\/01\/1.2358-180x180.jpg 180w, https:\/\/waldunsteel.com\/wp-content\/uploads\/2024\/01\/1.2358-705x705.jpg 705w, https:\/\/waldunsteel.com\/wp-content\/uploads\/2024\/01\/1.2358.jpg 750w\" sizes=\"(max-width: 36px) 100vw, 36px\" \/><\/a><div class=\"news-headline\"><a class='news-title' title=\"Leia: A\u00e7o 60CrMoV18-5\" href=\"https:\/\/waldunsteel.com\/pt\/products\/60crmov18-5-steel\/\">A\u00e7o 60CrMoV18-5<\/a><span class=\"news-time\">11 de janeiro de 2024 - 3h02<\/span><\/div><\/div><\/li><li class=\"news-content post-format-standard\"><div class=\"news-link\"><a class='news-thumb' title=\"Leia: A\u00e7o 1.2358\" href=\"https:\/\/waldunsteel.com\/pt\/products\/1-2358-steel\/\"><img 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<\/strong><\/p>\n<p>iguhongtao@gmail.com<\/p>\n<\/div>\n\t\t<span class=\"seperator extralight-border\"><\/span><\/section><section id=\"media_image-2\" class=\"widget clearfix widget_media_image\"><img decoding=\"async\" width=\"300\" height=\"158\" src=\"https:\/\/waldunsteel.com\/wp-content\/uploads\/2022\/05\/Waldun-Steel-ISO-9001-Logo-300x158-1.png\" class=\"image wp-image-1937  attachment-full size-full\" alt=\"waldun a\u00e7o iso 9001 logo 300x158\" style=\"max-width: 100%; height: auto;\" srcset=\"https:\/\/waldunsteel.com\/wp-content\/uploads\/2022\/05\/Waldun-Steel-ISO-9001-Logo-300x158-1.png 300w, https:\/\/waldunsteel.com\/wp-content\/uploads\/2022\/05\/Waldun-Steel-ISO-9001-Logo-300x158-1-18x9.png 18w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><span class=\"seperator extralight-border\"><\/span><\/section><\/div><\/p><\/div><\/p>","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":827,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"tags":[],"portfolio_entries":[30,29],"class_list":["post-825","portfolio","type-portfolio","status-publish","has-post-thumbnail","hentry","portfolio_entries-alloysteel","portfolio_entries-engineeringsteel"],"_links":{"self":[{"href":"https:\/\/waldunsteel.com\/pt\/wp-json\/wp\/v2\/portfolio\/825","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/waldunsteel.com\/pt\/wp-json\/wp\/v2\/portfolio"}],"about":[{"href":"https:\/\/waldunsteel.com\/pt\/wp-json\/wp\/v2\/types\/portfolio"}],"author":[{"embeddable":true,"href":"https:\/\/waldunsteel.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/waldunsteel.com\/pt\/wp-json\/wp\/v2\/comments?post=825"}],"version-history":[{"count":0,"href":"https:\/\/waldunsteel.com\/pt\/wp-json\/wp\/v2\/portfolio\/825\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/waldunsteel.com\/pt\/wp-json\/wp\/v2\/media\/827"}],"wp:attachment":[{"href":"https:\/\/waldunsteel.com\/pt\/wp-json\/wp\/v2\/media?parent=825"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/waldunsteel.com\/pt\/wp-json\/wp\/v2\/tags?post=825"},{"taxonomy":"portfolio_entries","embeddable":true,"href":"https:\/\/waldunsteel.com\/pt\/wp-json\/wp\/v2\/portfolio_entries?post=825"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}