{"id":9413,"date":"2025-12-19T18:50:06","date_gmt":"2025-12-19T10:50:06","guid":{"rendered":"https:\/\/www.cncmachiningshops.com\/?p=9413"},"modified":"2026-01-01T10:26:19","modified_gmt":"2026-01-01T02:26:19","slug":"7075-aluminum","status":"publish","type":"post","link":"https:\/\/www.cncmachiningshops.com\/pt\/7075-aluminum\/","title":{"rendered":"Liga de alum\u00ednio 7075: Carater\u00edsticas, tratamento t\u00e9rmico T6, trabalhabilidade e usos de engenharia"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:calc( 1280px + 80px );margin-left: calc(-80px \/ 2 );margin-right: calc(-80px \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:40px;--awb-margin-bottom-large:0px;--awb-spacing-left-large:40px;--awb-width-medium:100%;--awb-spacing-right-medium:40px;--awb-spacing-left-medium:40px;--awb-width-small:100%;--awb-spacing-right-small:40px;--awb-spacing-left-small:40px;\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-1\"><div data-page-id=\"E2okdWmpvotFQgxdi9ucRcHYnlc\" data-lark-html-role=\"root\" data-docx-has-block-data=\"true\">\n<div class=\"ace-line ace-line old-record-id-Whq4d1dx5o8bFAxVpR4cZl6hnlb\">A liga de alum\u00ednio 7075 tem um lugar \u00fanico e frequentemente mal compreendido no grande sistema de ligas de alum\u00ednio forjado. Ela mostra o limite pr\u00e1tico superior de resist\u00eancia para o alum\u00ednio comum. Possui propriedades mec\u00e2nicas semelhantes \u00e0s de muitos a\u00e7os de baixo carbono, mas ainda \u00e9 leve. O 7075 \u00e9 o melhor \u201calum\u00ednio de alta resist\u00eancia\u201d porque tem uma incr\u00edvel rela\u00e7\u00e3o resist\u00eancia-peso. Tamb\u00e9m \u00e9 um material fundamental na aerospace e engenharia de alto desempenho.<\/div>\n<div class=\"ace-line ace-line old-record-id-P3VgdrChxoOv6lx2tmwc3OoInte\">O 7075-T6 \u00e9 frequentemente chamado de \u201calum\u00ednio semelhante ao a\u00e7o\u201d pelos engenheiros. Seus limites de escoamento e resist\u00eancia \u00e0 tra\u00e7\u00e3o s\u00e3o muito superiores aos da liga 6061, que \u00e9 usada em muitos produtos. \u00c9 por isso que o 7075 \u00e9 t\u00e3o importante para coisas como estruturas de fuselagem de aeronaves, longarinas de asas e equipamentos de escalada de precis\u00e3o, onde a redu\u00e7\u00e3o de peso \u00e9 muito importante e os caminhos de carga s\u00e3o muito solicitados.<\/div>\n<div class=\"ace-line ace-line old-record-id-MR1GdW3jto2DJSx0ok8cxgyrnty\">O valor do 7075, por outro lado, n\u00e3o est\u00e1 apenas em qu\u00e3o resistente ele \u00e9, mas tamb\u00e9m em quanto essa resist\u00eancia custa. O 7075 \u00e9 diferente de outras ligas porque faz grandes concess\u00f5es de engenharia. Seus altos n\u00edveis de zinco e cobre o tornam mais propenso \u00e0 corros\u00e3o, impossibilitam a soldagem e dificultam a usinagem.<\/div>\n<div class=\"ace-line ace-line old-record-id-VqrjdD4azofFadxdhOzcQ51unzs\">Este guia oferece uma vis\u00e3o t\u00e9cnica completa do alum\u00ednio 7075. Vamos analisar do que ele \u00e9 feito, como o tratamento t\u00e9rmico T6 funciona, como usin\u00e1-lo e a importante estrutura de tomada de decis\u00e3o necess\u00e1ria para escolher este material resistente, mas dif\u00edcil.<\/div>\n<h2 class=\"heading-2 ace-line old-record-id-DOB0djdv7owCVmxM1qYcdjTrnvb\">O que \u00e9 a liga de alum\u00ednio 7075? Sistema de ligas e composi\u00e7\u00e3o<\/h2>\n<div class=\"ace-line ace-line old-record-id-H66jdopa7oydM5xFwOBcK9dBnbg\">O alum\u00ednio 7075 \u00e9 a melhor liga da s\u00e9rie 7xxx. Esta fam\u00edlia foi criada para ser o mais resistente poss\u00edvel, n\u00e3o apenas f\u00e1cil de fabricar.<\/div>\n<h3 class=\"heading-3 ace-line old-record-id-Aq0qdKXI8oWURkxnw6ucWOsgnOf\">O papel de engenharia das ligas de alum\u00ednio da s\u00e9rie 7xxx<\/h3>\n<div class=\"ace-line ace-line old-record-id-GLzAdd4p7oIMMVxf0l4cWXlPn5g\">O sistema Alum\u00ednio\u2013Zinco\u2013Magn\u00e9sio\u2013Cobre (Al-Zn-Mg-Cu) define a s\u00e9rie 7xxx. Para ver onde ele se encaixa na hierarquia de materiais, considere esta compara\u00e7\u00e3o:<\/div>\n<ul class=\"list-bullet1\">\n<li class=\"ace-line ace-line old-record-id-MkzcdfkDyoUYelxFjNfcJmIwnac\" data-list=\"bullet\">\n<div><strong>S\u00e9rie 5xxx (ex.: 5083):<\/strong> N\u00e3o pode ser tratada termicamente. Prioriza a resist\u00eancia \u00e0 corros\u00e3o e a soldabilidade. Usada em cascos de barcos.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-KwDLdr94YoXgV1xwPy0cWCEon9d\" data-list=\"bullet\">\n<div><strong>S\u00e9rie 6xxx (ex.: 6061):<\/strong> Ligas que podem ser tratadas termicamente de forma equilibrada. Prioriza versatilidade, extrusabilidade e resist\u00eancia \u00e0 corros\u00e3o. Usada em constru\u00e7\u00f5es em geral.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-ZYFkdwkrzoHdJtxMb2zckw3unNf\" data-list=\"bullet\">\n<div><strong>S\u00e9rie 7xxx (ex.: 7075):<\/strong> Ligas que podem ser tratadas termicamente para torn\u00e1-las mais resistentes. Abre m\u00e3o da soldabilidade e da resist\u00eancia \u00e0 corros\u00e3o para obter o m\u00e1ximo de resist\u00eancia e rigidez.<\/div>\n<\/li>\n<\/ul>\n<h3 class=\"heading-3 ace-line old-record-id-AcdUdygLDoTIYDxUtVNcU9PWncc\">Por que o zinco \u00e9 o metal mais importante para a resist\u00eancia<\/h3>\n<div class=\"ace-line ace-line old-record-id-TQ5wdOL9moL47oxQRcTc8AAMnBb\">O principal elemento de liga \u00e9 o zinco (Zn), que representa 5,1% a 6,1% do total. Quando misturado com Magn\u00e9sio (Mg) e Cobre (Cu), o Zinco possibilita que o tratamento t\u00e9rmico crie precipitados de endurecimento muito resistentes. Diferente do <em>Mg<\/em>2<em>Si <\/em>no 6061, os precipitados em \u03b7\u2032 No 7075, os precipitados de MgZn2 criam uma barreira muito mais densa e resistente ao movimento de discord\u00e2ncias dentro da rede cristalina do metal.<\/div>\n<div class=\"ace-line ace-line old-record-id-ZfhLd0nw7op68bx0OYMcvhFOnlc\"><strong>Perce\u00e7\u00e3o da engenharia:<\/strong> O 7075 n\u00e3o \u00e9 apenas uma vers\u00e3o melhor do 6061; \u00e9 uma liga especial. \u00c9 escolhido quando a resist\u00eancia \u00e9 o fator mais importante e as concess\u00f5es que v\u00eam com ela \u2014 dificuldade de usinagem, impossibilidade de soldagem e risco de corros\u00e3o \u2014 s\u00e3o cuidadosamente consideradas.<\/div>\n<h3 class=\"heading-3 ace-line old-record-id-O4sYdxjFNoKRl1x5ILNc2QTgn5g\">A composi\u00e7\u00e3o qu\u00edmica do alum\u00ednio 7075 e como ele obt\u00e9m sua resist\u00eancia<\/h3>\n<div class=\"ace-line ace-line old-record-id-DvjldUWbmo1BcIxIGxocdlMMn5c\">O 7075 \u00e9 muito resistente por causa da forma como seus elementos qu\u00edmicos s\u00e3o misturados.<\/div>\n<div class=\"ace-line ace-line old-record-id-XAZndi8fJoU4SKxV66xcvafqnxh\"><strong>Tabela 1: Composi\u00e7\u00e3o qu\u00edmica comum (wt.%)<\/strong><\/div>\n<div class=\"old-record-id-Nmupd8Nbnohp3zxaqORcqkeEnHe\" data-type=\"sheet\">\n<table>\n<colgroup>\n<col width=\"116\" \/>\n<col width=\"116\" \/>\n<col width=\"116\" \/>\n<col width=\"411\" \/><\/colgroup>\n<tbody>\n<tr>\n<td>Elemento<\/td>\n<td>M\u00ednimo %<\/td>\n<td>M\u00e1ximo %<\/td>\n<td>Fun\u00e7\u00e3o principal de engenharia<\/td>\n<\/tr>\n<tr>\n<td>Zinco (Zn)<\/td>\n<td data-sheet-value=\"5.1\">5.1<\/td>\n<td data-sheet-value=\"6.1\">6.1<\/td>\n<td>O principal agente de refor\u00e7o; forma precipitados de MgZn2.<\/td>\n<\/tr>\n<tr>\n<td>Magn\u00e9sio (Mg)<\/td>\n<td data-sheet-value=\"2.1\">2.1<\/td>\n<td data-sheet-value=\"2.9\">2.9<\/td>\n<td>importante para o endurecimento por precipita\u00e7\u00e3o e torna as coisas mais resistentes.<\/td>\n<\/tr>\n<tr>\n<td>Cobre (Cu)<\/td>\n<td data-sheet-value=\"1.2\">1.2<\/td>\n<td data-sheet-value=\"2\">2<\/td>\n<td>Torna as coisas mais resistentes e duras, mas menos resistentes \u00e0 corros\u00e3o.<\/td>\n<\/tr>\n<tr>\n<td>Cromo (Cr)<\/td>\n<td data-sheet-value=\"0.18\">0.18<\/td>\n<td data-sheet-value=\"0.28\">0.28<\/td>\n<td>Controla a estrutura dos gr\u00e3os e os torna melhores em resistir \u00e0 corros\u00e3o sob tens\u00e3o.<\/td>\n<\/tr>\n<tr>\n<td>Ferro (Fe)<\/td>\n<td>\u2013<\/td>\n<td data-sheet-value=\"0.5\">0.5<\/td>\n<td>uma impureza que \u00e9 mantida baixa para manter o material tenaz.<\/td>\n<\/tr>\n<tr>\n<td>Sil\u00edcio (Si)<\/td>\n<td>\u2013<\/td>\n<td data-sheet-value=\"0.4\">0.4<\/td>\n<td>Impureza (mantida baixa).<\/td>\n<\/tr>\n<tr>\n<td>Alum\u00ednio (Al)<\/td>\n<td>Equil\u00edbrio<\/td>\n<td><\/td>\n<td>Matriz de base.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3 class=\"heading-3 ace-line old-record-id-EyiJdgVYcoT60fxl5njcqKUgn3c\">A ci\u00eancia do T6: Endurecimento por precipita\u00e7\u00e3o<\/h3>\n<div class=\"ace-line ace-line old-record-id-X67ddoy7yobKY1xVEoLcukQinQR\">O 7075 atinge suas melhores propriedades atrav\u00e9s de um ciclo t\u00e9rmico espec\u00edfico chamado Endurecimento por Precipita\u00e7\u00e3o:<\/div>\n<ol class=\"list-number1\" start=\"1\">\n<li class=\"ace-line ace-line old-record-id-SY3pdgA2WoXqVrxzKAHcvJgUn9c\" data-list=\"number\">\n<div><strong>Tratamento t\u00e9rmico de solubiliza\u00e7\u00e3o:<\/strong> Aquecer a liga at\u00e9 que Zn, Mg e Cu se dissolvam em uma solu\u00e7\u00e3o s\u00f3lida.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-ZRv8dOblQoiaXXxVAszcrMcXncd\" data-list=\"number\">\n<div><strong>T\u00eampera:<\/strong> Esses elementos congelam em um estado supersaturado quando esfriam rapidamente.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-PD4hd2n3FoOq99xrHXBc19omnDh\" data-list=\"number\">\n<div><strong>Envelhecimento Artificial (T6):<\/strong> O ajuste fino do processo de reaquecimento permite que \u03b7\u2032 nucleie.<\/div>\n<\/li>\n<\/ol>\n<div class=\"ace-line ace-line old-record-id-MAQndZJzJo4ersxy6mMcBxkhngg\">Esta microestrutura mostra por que o 7075 \u00e9 t\u00e3o resistente e por que \u00e9 menos flex\u00edvel. Os precipitados densos que impedem a deforma\u00e7\u00e3o tamb\u00e9m tornam o material menos capaz de se esticar antes de quebrar.<\/div>\n<h2 class=\"heading-2 ace-line old-record-id-P95bd1fDhoGAlFxKQC4cRV8knBb\">Propriedades f\u00edsicas e mec\u00e2nicas do alum\u00ednio 7075<\/h2>\n<div class=\"ace-line ace-line old-record-id-ICyQdwA6CokjZex300EcYK1kngg\">Os engenheiros precisam analisar as propriedades do 7075 sob certas condi\u00e7\u00f5es de tempera. A forma como os dois tipos de metal se comportam mecanicamente \u00e9 muito diferente. O T6 \u00e9 mais resistente em seu pico, enquanto o T73 \u00e9 melhor em resistir \u00e0 corros\u00e3o.<\/div>\n<h3 class=\"heading-3 ace-line old-record-id-QCc7dVNEboK6OAxRJCScMXlvnog\">Propriedades do metal temperado<\/h3>\n<div class=\"ace-line ace-line old-record-id-ZMpRdBDMooX9kcx8v77cl1z4nph\"><strong>Tabela 2: Compara\u00e7\u00e3o de propriedades mec\u00e2nicas t\u00edpicas<\/strong><\/div>\n<div class=\"old-record-id-C9NxdSp8qooZthxawGIc9BWGnsb\" data-type=\"sheet\">\n<table>\n<colgroup>\n<col width=\"132\" \/>\n<col width=\"132\" \/>\n<col width=\"132\" \/>\n<col width=\"132\" \/>\n<col width=\"257\" \/><\/colgroup>\n<tbody>\n<tr>\n<td>Propriedade<\/td>\n<td>7075-O (Recozido)<\/td>\n<td>7075-T6 \/ T651<\/td>\n<td>7075-T73<\/td>\n<td>O que eles significam na engenharia<\/td>\n<\/tr>\n<tr>\n<td>Resist\u00eancia \u00e0 tra\u00e7\u00e3o<\/td>\n<td>~228 MPa<\/td>\n<td>~572 MPa (83 ksi)<\/td>\n<td>~505 MPa<\/td>\n<td>O T6 \u00e9 um dos tipos mais resistentes de alum\u00ednio.<\/td>\n<\/tr>\n<tr>\n<td>Resist\u00eancia ao escoamento<\/td>\n<td>~103 MPa<\/td>\n<td>~503 MPa (73 ksi)<\/td>\n<td>~435 MPa<\/td>\n<td>O limite de escoamento do T6 \u00e9 quase o dobro do 6061-T6.<\/td>\n<\/tr>\n<tr>\n<td>Alongamento<\/td>\n<td data-sheet-value=\"0.17\" data-auto-formatter=\"0%\">17%<\/td>\n<td data-sheet-value=\"0.11\" data-auto-formatter=\"0%\">11%<\/td>\n<td data-sheet-value=\"0.13\" data-auto-formatter=\"0%\">13%<\/td>\n<td>O T6 tem baixa ductilidade e \u00e9 dif\u00edcil de conformar.<\/td>\n<\/tr>\n<tr>\n<td>Dureza (Brinell)<\/td>\n<td>60 HB<\/td>\n<td>150 HB<\/td>\n<td>135 HB<\/td>\n<td>Muito duro; n\u00e3o se desgasta nem amassa facilmente.<\/td>\n<\/tr>\n<tr>\n<td>Resist\u00eancia \u00e0 fratura<\/td>\n<td>Alto<\/td>\n<td>Baixo<\/td>\n<td>Moderado<\/td>\n<td>O T73 \u00e9 mais tenaz que o T6.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3 class=\"heading-3 ace-line old-record-id-KZZrdQKZUoCePjxxTIOcZUmOnCe\">Propriedades F\u00edsicas Importantes para Projetos de Alta Carga<\/h3>\n<ul class=\"list-bullet1\">\n<li class=\"ace-line ace-line old-record-id-EmPtdMmrLoH9yDxFrohc354rnug\" data-list=\"bullet\">\n<div><strong>Densidade:<\/strong> 2,81 g\/cm\u00b3 (um pouco mais pesado que o 6061 porque cont\u00e9m zinco e cobre).<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-IkiBdwLWGo4fCSxVO64cSzTuntf\" data-list=\"bullet\">\n<div><strong>M\u00f3dulo de elasticidade:<\/strong> 71,7 GPa (10,4 msi).<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-RmD0djNp8orhSsxdQGRcPYDZnpg\" data-list=\"bullet\">\n<div><strong>Condutividade t\u00e9rmica:<\/strong> ~130 W\/m-K (menos que o 6061; o calor se acumula mais r\u00e1pido durante a usinagem).<\/div>\n<\/li>\n<\/ul>\n<div class=\"ace-line ace-line old-record-id-UIl0dQbTtoR1p7xyGA3ciiwOnXd\"><strong>Nota de Projeto Importante:<\/strong> O 7075 \u00e9 80% mais resistente que o 6061, mas n\u00e3o \u00e9 muito mais r\u00edgido. Se o seu projeto \u00e9 limitado por deflex\u00e3o (flex\u00e3o), mudar para o 7075 n\u00e3o ajudar\u00e1 a menos que voc\u00ea altere a forma. A resist\u00eancia impede que as coisas mudem de forma permanentemente, e a rigidez impede que as coisas se dobrem elasticamente.<\/div>\n<h2 class=\"heading-2 ace-line old-record-id-Eu4cdAmiXoIVqLxT7KAcSApZnhb\">Alum\u00ednio 7075-T6: Tratamento T\u00e9rmico, Resist\u00eancia e Risco de Corros\u00e3o sob Tens\u00e3o<\/h2>\n<div class=\"ace-line ace-line old-record-id-IFPLdTXnjos1qQxmupScAeKGnKf\">O estado 7075-T6 \u00e9 o ponto em que esta liga \u00e9 mais resistente na vida real. Mas trabalhar neste n\u00edvel de pico tem riscos para os metais.<\/div>\n<h3 class=\"heading-3 ace-line old-record-id-OCesdtsp6omR2SxYlAfct12LnGT\">O Trade-off: Resist\u00eancia vs. SCC<\/h3>\n<div class=\"ace-line ace-line old-record-id-D4oFdEYKeod3zVxWcytcJs7ynlc\">O T6 torna o limite de escoamento o mais alto poss\u00edvel, mas tamb\u00e9m torna a microestrutura mais propensa a trincas sob tens\u00e3o (SCC).<\/div>\n<ul class=\"list-bullet1\">\n<li class=\"ace-line ace-line old-record-id-NpJKdgkZEooZbWx6hEpckS3pn76\" data-list=\"bullet\">\n<div><strong>O Mecanismo:<\/strong> Quando h\u00e1 um ambiente corrosivo (como \u00e1gua salgada) e uma carga de tra\u00e7\u00e3o constante (como um parafuso pr\u00e9-carregado), as trincas podem come\u00e7ar ao longo dos contornos de gr\u00e3o e se propagar rapidamente, causando uma falha catastr\u00f3fica s\u00fabita.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-GYIQda2uUoP409x8D7dchQyDn2l\" data-list=\"bullet\">\n<div><strong>A Solu\u00e7\u00e3o (T\u00eampera T73):<\/strong> Os engenheiros frequentemente usam o 7075-T73 para pe\u00e7as aeroespaciais importantes que ficar\u00e3o expostas ao tempo. Esta t\u00eampera \u201csuperenvelhecida\u201d perde cerca de 10\u201315% de sua resist\u00eancia (ver Tabela 2), mas torna o SCC e a corros\u00e3o exfoliativa muito menos propensos a ocorrer.<\/div>\n<\/li>\n<\/ul>\n<h3 class=\"heading-3 ace-line old-record-id-HjXzddRF2o8VkUxp9xdc5vqhnJf\">T651 e Tens\u00e3o Residual<\/h3>\n<div class=\"ace-line ace-line old-record-id-IFSEdIkRoot7sjxgd8jcWSvPnBf\">A t\u00eampera r\u00e1pida faz com que placas espessas tenham muita tens\u00e3o interna. Essas tens\u00f5es se liberam quando a pe\u00e7a \u00e9 usinada, o que faz com que ela empena.<\/div>\n<div class=\"ace-line ace-line old-record-id-IBdKdlzLxo8HVZxVrZ8ceQE8nUg\"><strong>Dica:<\/strong> Sempre solicite 7075-T651 para usinagem. O \u201c51\u201d significa que o material foi esticado mecanicamente para aliviar a tens\u00e3o interna, o que mant\u00e9m sua forma.<\/div>\n<h2 class=\"heading-2 ace-line old-record-id-U90md0yIyo8JN1x8VJvcweBunPg\">Qu\u00e3o f\u00e1cil \u00e9 usinar o alum\u00ednio 7075 na fabrica\u00e7\u00e3o CNC<\/h2>\n<div class=\"ace-line ace-line old-record-id-NCA7dTtZNoYUVCxSKqQceIEnn6b\">As pessoas frequentemente chamam o alum\u00ednio 7075 de \u201cusin\u00e1vel\u201d na fabrica\u00e7\u00e3o CNC, mas este termo precisa de mais informa\u00e7\u00f5es para ser compreendido. Ele corta de forma limpa, mas \u00e9 preciso ter cuidado com ele.<\/div>\n<h3 class=\"heading-3 ace-line old-record-id-NPdzdxO1Io4Xp4xwdmHcrOKLn4b\">Por que o 7075 Funciona Bem (Mas N\u00e3o \u00c9 F\u00e1cil)<\/h3>\n<div class=\"ace-line ace-line old-record-id-QVv3dy6Geohr2hxXGECcZvyznLd\">O 7075 \u00e9 duro e quebradi\u00e7o para o alum\u00ednio, o que o torna bom para a forma\u00e7\u00e3o de cavacos. Ele produz cavacos curtos e quebr\u00e1veis que s\u00e3o f\u00e1ceis de remover. Isso \u00e9 diferente dos cavacos \u201cpegajosos\u201d produzidos por ligas macias como 3003 ou 5052. Isso proporciona \u00f3timos acabamentos na superf\u00edcie.<\/div>\n<div class=\"ace-line ace-line old-record-id-MChhd8pgFoBcxCxkR0UcrcXdnUf\">O problema \u00e9 que a alta resist\u00eancia ao cisalhamento significa que as for\u00e7as de corte s\u00e3o muito mais fortes. Isso faz o fuso e a fixa\u00e7\u00e3o da pe\u00e7a trabalharem mais.<\/div>\n<h3 class=\"heading-3 ace-line old-record-id-XDXTdXRfSoMnUCxJc1Fck4Xinv1\">Guia de estrat\u00e9gia de usinagem<\/h3>\n<ul class=\"list-bullet1\">\n<li class=\"ace-line ace-line old-record-id-IFDrdUnAqowGPKxio3ociGBun7R\" data-list=\"bullet\">\n<div><strong>Ferramentas:<\/strong> Use ferramentas de metal duro afiadas e polidas para o ferramental. O 7075 \u00e9 duro para o alum\u00ednio, mas \u00e9 macio comparado ao a\u00e7o. Revestimentos como TiB2 ou DLC ajudam a evitar a aresta posti\u00e7a de corte (BUE).<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-KXabdgdQiovwHvx5mYAcSFAbnAd\" data-list=\"bullet\">\n<div><strong>Controle de Calor:<\/strong> A ponta da ferramenta fica mais quente porque o material n\u00e3o conduz calor t\u00e3o bem quanto o 6061. Para evitar erros causados pela expans\u00e3o t\u00e9rmica, \u00e9 necess\u00e1rio refrigerante de alta press\u00e3o.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-WdG8dHZjZosBAjxuPdDcH59lnYc\" data-list=\"bullet\">\n<div><strong>Desgaste da Ferramenta:<\/strong> A vida da ferramenta ser\u00e1 mais curta do que com o 6061. Os elementos de liga, como Zn e Cu, s\u00e3o mais abrasivos.<\/div>\n<\/li>\n<\/ul>\n<div class=\"ace-line ace-line old-record-id-Rc09dEGV9o86sYxB8RKc1fZknNI\"><strong>Tabela 3: Compara\u00e7\u00e3o de Usinabilidade<\/strong><\/div>\n<div class=\"old-record-id-Bt1bdcZhaoN8n0xwzdRcVqJwnfo\" data-type=\"sheet\">\n<table>\n<colgroup>\n<col width=\"175\" \/>\n<col width=\"175\" \/>\n<col width=\"175\" \/><\/colgroup>\n<tbody>\n<tr>\n<td>Recurso<\/td>\n<td>7075-T6<\/td>\n<td>6061-T6<\/td>\n<\/tr>\n<tr>\n<td>Acabamento da superf\u00edcie<\/td>\n<td>\u00d3timo (N\u00edtido)<\/td>\n<td>Muito bom<\/td>\n<\/tr>\n<tr>\n<td>Controle de Cavacos<\/td>\n<td>\u00d3timo (Quebra bem)<\/td>\n<td>Bom<\/td>\n<\/tr>\n<tr>\n<td>For\u00e7a de Corte<\/td>\n<td>Alto<\/td>\n<td>Moderado<\/td>\n<\/tr>\n<tr>\n<td>Vida da Ferramenta<\/td>\n<td>Bom<\/td>\n<td>Excelente<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2 class=\"heading-2 ace-line old-record-id-LB0hdr4tEoh8RVx83qscaeJUnEc\">Limita\u00e7\u00f5es do Alum\u00ednio 7075 em Jun\u00e7\u00e3o e Soldagem<\/h2>\n<div class=\"ace-line ace-line old-record-id-WJ9ldqCFxoUYGNxp1eNc1jxUnjT\">O 7075 \u00e9 muito resistente, mas tem um grande problema: n\u00e3o pode ser soldado.<\/div>\n<h3 class=\"heading-3 ace-line old-record-id-IJiOd7Qi9o8zoyxXue2ciPVNnKh\">Por que voc\u00ea n\u00e3o deve soldar o 7075<\/h3>\n<div class=\"ace-line ace-line old-record-id-Qrs4d8qivokjJaxn9WKcqzQMnHg\">A soldagem por fus\u00e3o (TIG\/MIG) tem muito Zinco e Cobre em sua composi\u00e7\u00e3o, o que causa:<\/div>\n<ol class=\"list-number1\" start=\"1\">\n<li class=\"ace-line ace-line old-record-id-BzPLdmtNsoWhSOxJt5TcnQnwnif\" data-list=\"number\">\n<div><strong>Trincas a Quente:<\/strong> \u00c0 medida que a liga esfria, ela forma microtrincas no cord\u00e3o de solda.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-GTHydLWUpoTNU7xLSxUcOeJinnf\" data-list=\"number\">\n<div><strong>Destrui\u00e7\u00e3o da Microestrutura:<\/strong> O calor destr\u00f3i a t\u00eampera T6. A Zona Afetada pelo Calor (ZAC) perde quase toda a sua resist\u00eancia e volta a um estado macio e recozido que n\u00e3o pode ser corrigido apenas por envelhecimento.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-ZfI6dACcdoR7zExt4facC0dtn6g\" data-list=\"number\">\n<div><strong>Corros\u00e3o:<\/strong> A zona de solda torna-se muito an\u00f3dica, o que faz com que a corros\u00e3o galv\u00e2nica ocorra rapidamente.<\/div>\n<\/li>\n<\/ol>\n<h3 class=\"heading-3 ace-line old-record-id-DvWyd5f9OoicPwxl39TckL89nhe\">Op\u00e7\u00f5es de Jun\u00e7\u00e3o<\/h3>\n<ul class=\"list-bullet1\">\n<li class=\"ace-line ace-line old-record-id-EBcIdaSmAo7WobxqboUcEw62nNf\" data-list=\"bullet\">\n<div><strong>Parafusamento e rebitagem<\/strong><strong>:<\/strong> s\u00e3o os padr\u00f5es na ind\u00fastria aeroespacial. O uso de fixadores resistentes evita que o metal base se quebre.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-Cthed7defou18rxYSW9cx1sNnqh\" data-list=\"bullet\">\n<div><strong>Colagem de adesivos:<\/strong> Ep\u00f3xis estruturais s\u00e3o bons para distribuir cargas.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-HGaadNJwPouHrIx4qIScUqZsnCb\" data-list=\"bullet\">\n<div><strong>Soldagem por Fric\u00e7\u00e3o e Agita\u00e7\u00e3o (FSW):<\/strong> Um processo de uni\u00e3o no estado s\u00f3lido usado em aplica\u00e7\u00f5es aeroespaciais especializadas para unir o 7075 sem fundi-lo.<\/div>\n<\/li>\n<\/ul>\n<h2 class=\"heading-2 ace-line old-record-id-SRtodb9eiowh12xFiQwcRz6Gn1g\">Como Tratar a Superf\u00edcie e Como Parar a Corros\u00e3o<\/h2>\n<div class=\"ace-line ace-line old-record-id-Mn5CdNPqqoSiloxXWCcclTsNnMf\">O 7075 n\u00e3o resiste \u00e0 corros\u00e3o t\u00e3o bem quanto as s\u00e9ries 5xxx ou 6xxx. O teor de cobre facilita a ocorr\u00eancia de corros\u00e3o galv\u00e2nica.<\/div>\n<h3 class=\"heading-3 ace-line old-record-id-WexEdtB4gohq0Xxa3WicL0qknkc\">Formas de Prote\u00e7\u00e3o<\/h3>\n<div class=\"ace-line ace-line old-record-id-WRAwdFgfnogqMAxJcNocJaQRnQh\">O 7075 anodiza bem.<\/div>\n<ul class=\"list-bullet1\">\n<li class=\"ace-line ace-line old-record-id-XoHxddTyroNFvaxhdnlcaITtnUg\" data-list=\"bullet\">\n<div><strong>Hardcoat (Tipo III):<\/strong> Melhor para proteger contra desgaste e ferrugem.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-IG4cdzObko0MqTxLg23c3JVknpd\" data-list=\"bullet\">\n<div><strong>Nota sobre Cor:<\/strong> Devido \u00e0 mistura de ligas, a anodiza\u00e7\u00e3o transparente pode ter um tom amarelado ou dourado, e as cores tingidas podem n\u00e3o corresponder exatamente \u00e0s pe\u00e7as em 6061.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-NWEXd94obob4vUxLVhTc2BSsnxh\" data-list=\"bullet\">\n<div><strong>Alclad 7075:<\/strong> O 7075 \u00e9 frequentemente vendido como \u201cAlclad\u201d para chapas met\u00e1licas. Trata-se de um n\u00facleo de 7075 resistente sanduichado entre camadas finas de alum\u00ednio puro. A camada de alum\u00ednio puro impede que o n\u00facleo enferruje.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-B2OUdb4cRoNvrMxNo9pcdp9Kn3b\" data-list=\"bullet\">\n<div><strong>Chem-Film (Alodine):<\/strong> Necess\u00e1rio para condutividade el\u00e9trica e como base para pintura.<\/div>\n<\/li>\n<\/ul>\n<h2 class=\"heading-2 ace-line old-record-id-C23CdjBg0o5PvBxj2fTc8a5Vntf\">7075 vs Alum\u00ednio 6061: Pr\u00f3s e Contras de Resist\u00eancia, Usinabilidade e Custo<\/h2>\n<div class=\"ace-line ace-line old-record-id-GFpjdxC7AopUTRxLOHHcSjRrnjh\">Uma das escolhas mais comuns de materiais \u00e9 comparar o alum\u00ednio 6061 e o 7075.<\/div>\n<div class=\"ace-line ace-line old-record-id-PedNdtEAmolVHxxiUlXcmgPwnnb\"><strong>Tabela 4: Uma Compara\u00e7\u00e3o da Engenharia do 7075 e do 6061<\/strong><\/div>\n<div class=\"old-record-id-Pv9XdIsY5ofNhmx2tZbcrN1Bnnd\" data-type=\"sheet\">\n<table>\n<colgroup>\n<col width=\"148\" \/>\n<col width=\"148\" \/>\n<col width=\"148\" \/>\n<col width=\"331\" \/><\/colgroup>\n<tbody>\n<tr>\n<td>Recurso<\/td>\n<td>7075-T6<\/td>\n<td>6061-T6<\/td>\n<td>L\u00f3gica de Sele\u00e7\u00e3o<\/td>\n<\/tr>\n<tr>\n<td>Resist\u00eancia ao escoamento<\/td>\n<td>~503 MPa<\/td>\n<td>~276 MPa<\/td>\n<td>Use o 7075 para a melhor rela\u00e7\u00e3o resist\u00eancia-peso.<\/td>\n<\/tr>\n<tr>\n<td>Soldabilidade<\/td>\n<td>Ruim (N\u00e3o use)<\/td>\n<td>Bom<\/td>\n<td>Use o 6061 para estruturas soldadas.<\/td>\n<\/tr>\n<tr>\n<td>Corros\u00e3o<\/td>\n<td>Justo<\/td>\n<td>Muito bom<\/td>\n<td>O 6061 \u00e9 bom para uso externo geral.<\/td>\n<\/tr>\n<tr>\n<td>Custo<\/td>\n<td>Alto<\/td>\n<td>Baixa\/M\u00e9dia<\/td>\n<td>O 7075 custa 2\u20133 vezes mais que o 6061.<\/td>\n<\/tr>\n<tr>\n<td>Fabrica\u00e7\u00e3o<\/td>\n<td>Somente Usinagem<\/td>\n<td>Universal<\/td>\n<td>Use o 6061 para extrus\u00f5es e conforma\u00e7\u00e3o.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<div class=\"ace-line ace-line old-record-id-I28idxidlo94dBxijLocd6Munwb\"><strong>Regra para Escolha:<\/strong><\/div>\n<ul class=\"list-bullet1\">\n<li class=\"ace-line ace-line old-record-id-TIE3d1RC3oWyM1xV1GUcg1F5nUd\" data-list=\"bullet\">\n<div>Se a resist\u00eancia for o mais importante e voc\u00ea tiver o dinheiro, opte pelo 7075. (ex.: mosquet\u00f5es para escalada e nervuras para asas de avi\u00e3o).<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-VooWd5CpwoN3wuxJ7OBcjH9Wnig\" data-list=\"bullet\">\n<div>Para fabrica\u00e7\u00e3o geral, soldagem e custo-benef\u00edcio, escolha o 6061. (ex.: chassis de carro, carca\u00e7as eletr\u00f4nicas).<\/div>\n<\/li>\n<\/ul>\n<h3 class=\"heading-3 ace-line old-record-id-HmizdlZ0DoHTIYxk3MRcVdFmnub\">7075 e Alum\u00ednio 2024: Rivais na Ind\u00fastria Aeroespacial<\/h3>\n<div class=\"ace-line ace-line old-record-id-AYUUdQXeyo4Bh1xNsMLceWWBnQc\">O 7075 e o 2024 s\u00e3o as duas escolhas mais comuns na aeroespacial.<\/div>\n<ul class=\"list-bullet1\">\n<li class=\"ace-line ace-line old-record-id-RJnLdNhuuoJlH2xKpwmcEBpInTb\" data-list=\"bullet\">\n<div><strong>7075 (Al-Zn):<\/strong> Mais resistente quando n\u00e3o est\u00e1 em movimento. Usado para conex\u00f5es que est\u00e3o sob muita tens\u00e3o e pe\u00e7as que est\u00e3o sob muita press\u00e3o (como revestimentos superiores de asas).<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-RWAaddhDioCArdxWREVcbMCanQg\" data-list=\"bullet\">\n<div><strong>2024 (Al-Cu):<\/strong> Melhor para suportar fadiga e ruptura. Usado para pe\u00e7as que est\u00e3o sob tra\u00e7\u00e3o (como os revestimentos inferiores das asas) onde as trincas precisam crescer lentamente.<\/div>\n<\/li>\n<\/ul>\n<h2 class=\"heading-2 ace-line old-record-id-H2PQdHcaNojYQsxpvglcBItvnng\">Usos Comuns do Alum\u00ednio 7075 na Engenharia<\/h2>\n<div class=\"ace-line ace-line old-record-id-KMf0dh9FVoSodhxSlXycGjybndf\">O 7075 \u00e9 usado quando a falha n\u00e3o \u00e9 uma op\u00e7\u00e3o e o peso \u00e9 um problema.<\/div>\n<ul class=\"list-bullet1\">\n<li class=\"ace-line ace-line old-record-id-U7bzdWtsrovB2lxDmwkcowmEnQc\" data-list=\"bullet\">\n<div><strong>Aeroespacial:<\/strong> Estruturas de fuselagem, anteparas, longarinas de asas e pe\u00e7as de trem de pouso.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-JHPSdz5rHofhggxuIQacap9Jnkh\" data-list=\"bullet\">\n<div><strong>Defesa:<\/strong> Extens\u00f5es de receptor para armas (como tubos de buffer M16\/AR15) e carca\u00e7as de \u00f3ptica de precis\u00e3o.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-MekHdZXhaoGzU8xZP2mc0YAYnQb\" data-list=\"bullet\">\n<div><strong>Autom\u00f3vel:<\/strong> Pe\u00e7as de suspens\u00e3o, placas de chassis de corrida e engrenagens para carros e corridas.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-CIGadV813oPM3dx7WyAcDSfwn21\" data-list=\"bullet\">\n<div><strong>Equipamentos Esportivos:<\/strong> Quadros de bicicleta de alto padr\u00e3o, equipamentos de escalada e hastes de lacrosse.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-Q8DRdEEJUo9RehxCDYOcAMsPnQl\" data-list=\"bullet\">\n<div><strong>Fabrica\u00e7\u00e3o de Moldes:<\/strong> usado para moldes de inje\u00e7\u00e3o de curta dura\u00e7\u00e3o (placa 7075-T651) porque pode ser usinado mais r\u00e1pido que o a\u00e7o e mant\u00e9m bem os detalhes.<\/div>\n<\/li>\n<\/ul>\n<h2 class=\"heading-2 ace-line old-record-id-VpC9daVZkopP8LxuNToczkX9nSx\">Limites de Engenharia do Alum\u00ednio 7075<\/h2>\n<div class=\"ace-line ace-line old-record-id-AxJBd2k7PoWkAqxvaTac59GGnpb\">O 7075 \u00e9 uma \u201csuperliga\u201d, mas tem limites:<\/div>\n<ul class=\"list-bullet1\">\n<li class=\"ace-line ace-line old-record-id-TpHkdTkoSox0zzxwkiZcpQcdnOg\" data-list=\"bullet\">\n<div><strong>Sem soldagem:<\/strong> Se o seu projeto precisa de juntas soldadas, voc\u00ea precisa usar uma liga diferente.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-KmrTd2NYMoNkOpxPqYecQnbTnmf\" data-list=\"bullet\">\n<div><strong>Risco de Corros\u00e3o:<\/strong> Ele ir\u00e1 corroer e se deteriorar em locais \u00famidos se n\u00e3o tiver um revestimento protetor (anodiza\u00e7\u00e3o\/pintura).<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-Et2Rd2GbvoJezextlc5cH6wMnah\" data-list=\"bullet\">\n<div><strong>Custo:<\/strong> Custa muito mais do que o 6061. \u00c9 um desperd\u00edcio de dinheiro us\u00e1-lo para pe\u00e7as cosm\u00e9ticas de baixa tens\u00e3o.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-F4X3dvhD8opoT2xDnqwclK45nkb\" data-list=\"bullet\">\n<div><strong>Baixa Conformabilidade:<\/strong> Voc\u00ea n\u00e3o pode dobrar o 7075-T6 sem quebr\u00e1-lo. Ele precisa ser moldado enquanto est\u00e1 no estado recozido (condi\u00e7\u00e3o O) e depois aquecido, o que o torna dobr\u00e1vel.<\/div>\n<\/li>\n<\/ul>\n<h2 class=\"heading-2 ace-line old-record-id-DZPWdTCMvoQEjDxk4Q2cURt4nFc\">Resumo: Li\u00e7\u00f5es Importantes de Engenharia<\/h2>\n<div class=\"ace-line ace-line old-record-id-QwMMd3M3ro3m9exvhvkcq1uLnSe\">A liga de alum\u00ednio 7075 \u00e9 como um muscle car no mundo do alum\u00ednio: funciona bem, custa caro e precisa ser manuseada com cuidado. Ela ultrapassa os limites do que o alum\u00ednio pode fazer, sendo t\u00e3o resistente quanto o a\u00e7o, mas mais leve.<\/div>\n<div class=\"ace-line ace-line old-record-id-ZDQhd6cb5oFOpxxrr9XcG2XHnzg\"><strong>Pontos importantes:<\/strong><\/div>\n<ul class=\"list-bullet1\">\n<li class=\"ace-line ace-line old-record-id-AWkvdiObYoGsYBxLTZRcHQpxnbe\" data-list=\"bullet\">\n<div><strong>Use 7075-T6<\/strong> quando a resist\u00eancia ao escoamento e a rela\u00e7\u00e3o resist\u00eancia-peso s\u00e3o os fatores mais importantes no projeto.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-A1ieddvBmo7HRJxFo0gcSCMNnye\" data-list=\"bullet\">\n<div><strong>Controle o T\u00eampera:<\/strong> Use T651 para pe\u00e7as usinadas para garantir que sejam planas. Se a pe\u00e7a estiver em ambientes corrosivos e sob cargas pesadas por um longo per\u00edodo, use T73.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-ViW9dtfAxodZmIxfHoKcINVgnjc\" data-list=\"bullet\">\n<div><strong>Projete para Montagem:<\/strong> Planeje juntas parafusadas ou coladas, n\u00e3o soldas.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-RwzGd0PCDols2Rxd84scU4RrnKb\" data-list=\"bullet\">\n<div><strong>Sempre solicite anodiza\u00e7\u00e3o<\/strong> ou revestimento de convers\u00e3o para proteger a superf\u00edcie contra ferrugem.<\/div>\n<\/li>\n<\/ul>\n<div class=\"ace-line ace-line old-record-id-S9DwdadgpouJ96x2v9ccRBtLndd\">Os engenheiros podem criar estruturas seguras, duradouras e f\u00e1ceis de fabricar, que sejam leves e de alto desempenho, sabendo o que o 7075 pode e n\u00e3o pode fazer.<\/div>\n<h2 class=\"heading-2 ace-line old-record-id-AF6wdLhVQocmD7xGInCcR1gWnLs\">Perguntas frequentes<\/h2>\n<div class=\"ace-line ace-line old-record-id-Hw82dideaoNjjoxD12ecEFMxnZb\"><strong>P: O alum\u00ednio 7075 \u00e9 mais resistente que o a\u00e7o?<\/strong><\/div>\n<div class=\"ace-line ace-line old-record-id-Hw82dideaoNjjoxD12ecEFMxnZb\">R: Sim, o 7075-T6 \u00e9 mais resistente que muitos a\u00e7os estruturais, como o A36, quando se trata de resist\u00eancia espec\u00edfica (rela\u00e7\u00e3o resist\u00eancia-peso). \u00c9 t\u00e3o resistente quanto a\u00e7os de baixo teor, mas n\u00e3o t\u00e3o resistente quanto a\u00e7os ligados de alta resist\u00eancia como o 4140 ou o a\u00e7o inoxid\u00e1vel.<\/div>\n<div><\/div>\n<div class=\"ace-line ace-line old-record-id-NVxwdkDl6oNRK3xRoJ0chaguntk\"><strong>P: \u00c9 poss\u00edvel soldar o alum\u00ednio 7075?<\/strong><\/div>\n<div class=\"ace-line ace-line old-record-id-NVxwdkDl6oNRK3xRoJ0chaguntk\">R: N\u00e3o. A soldagem por fus\u00e3o cria microfissuras e enfraquece o material. Voc\u00ea deve usar fixadores ou cola para mont\u00e1-lo.<\/div>\n<div><\/div>\n<div class=\"ace-line ace-line old-record-id-PRoadaF7Ho2WeCxF8WzclDOinOh\"><strong>P: O 7075 enferruja?<\/strong><\/div>\n<div class=\"ace-line ace-line old-record-id-PRoadaF7Ho2WeCxF8WzclDOinOh\">R: Ele n\u00e3o \u201cenferruja\u201d (\u00f3xido de ferro vermelho), mas corr\u00f3i mais facilmente do que outros tipos de alum\u00ednio. Ele forma um p\u00f3 branco chamado \u00f3xido de alum\u00ednio e \u00e9 prov\u00e1vel que desenvolva picadas. Precisa ser anodizado ou pintado para se manter seguro.<\/div>\n<div><\/div>\n<div class=\"ace-line ace-line old-record-id-YymsdtJemoaiGNxDckFcEcVgn6c\"><strong>P: O que torna o 7075 t\u00e3o caro?<\/strong><\/div>\n<div class=\"ace-line ace-line old-record-id-YymsdtJemoaiGNxDckFcEcVgn6c\">R: Ele possui elementos de liga caros como zinco e cobre, e precisa de um processo complicado de tratamento t\u00e9rmico em v\u00e1rias etapas (Tratamento por solu\u00e7\u00e3o -&gt; T\u00eampera -&gt; Estiramento -&gt; Envelhecimento). Leva mais tempo e usa mais energia para ser produzido do que o 6061.<\/div>\n<div><\/div>\n<div class=\"ace-line ace-line old-record-id-LtSjdMrXQoOlwkxikqwc9RJonJc\"><strong>P: Qual \u00e9 a diferen\u00e7a entre 7075-T6 e 7075-T651?<\/strong><\/div>\n<div class=\"ace-line ace-line old-record-id-LtSjdMrXQoOlwkxikqwc9RJonJc\">R: O T6 \u00e9 apenas tratado termicamente. O T651 \u00e9 aquecido e depois estirado em 1\u20133% usando m\u00e1quinas. Esse estiramento elimina as tens\u00f5es residuais internas, de modo que a placa T651 n\u00e3o empena tanto quando voc\u00ea remove material.<\/div>\n<\/div>\n<\/div><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>A liga de alum\u00ednio 7075 tem um lugar \u00fanico e frequentemente mal compreendido no grande sistema de ligas de alum\u00ednio forjado.<\/p>","protected":false},"author":1,"featured_media":9568,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[103],"tags":[],"class_list":["post-9413","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-materials-guide"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.5 (Yoast SEO v28.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>7075 Aluminum Alloy: Properties, T6 Heat Treatment &amp; Uses<\/title>\n<meta name=\"description\" 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