{"id":24984,"date":"2026-11-04T16:05:17","date_gmt":"2026-11-04T08:05:17","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=24984"},"modified":"2026-11-04T16:13:22","modified_gmt":"2026-11-04T08:13:22","slug":"aluminum-extrusion-temperature","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/aluminum-extrusion-temperature\/","title":{"rendered":"Temperatura de extrus\u00e3o de alum\u00ednio: a janela, as s\u00e9ries de liga e o custo para a matriz"},"content":{"rendered":"<h1 class=\"wp-block-heading\">Temperatura de extrus\u00e3o de alum\u00ednio: a janela, as s\u00e9ries de liga e o custo para a matriz<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Cada s\u00e9rie de liga tem uma faixa de temperatura de extrus\u00e3o, e a faixa \u00e9 estreita. Abaixo dela, a prensa fica sem press\u00e3o; acima dela, a superf\u00edcie falha ou o metal come\u00e7a a fundir nos contornos de gr\u00e3o. A janela \u00e9 definida pelo solidus, ajustada para baixo pelo tratamento de homogeneiza\u00e7\u00e3o, e varia com a s\u00e9rie de liga em mais de 100 &deg;C. Esta p\u00e1gina apresenta as faixas publicadas, a mudan\u00e7a de patamar que as ligas 6xxx apresentam no seu solvus, e o que um controle de temperatura deficiente custa de fato em produ\u00e7\u00e3o.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">As faixas, por s\u00e9rie de liga<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">As tr\u00eas temperaturas que importam s\u00e3o o solidus, a perman\u00eancia de homogeneiza\u00e7\u00e3o e a faixa de extrus\u00e3o. A homogeneiza\u00e7\u00e3o para ligas comerciais \u00e9 normalmente de 20 a 50 &deg;C abaixo do solidus e o mais pr\u00f3ximo poss\u00edvel da temperatura inicial de trabalho a quente, raz\u00e3o pela qual os n\u00fameros abaixo acompanham uns aos outros.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">S\u00e9rie de liga<\/th><th class=\"has-text-align-left\" data-align=\"left\">Solidus (&deg;C)<\/th><th class=\"has-text-align-left\" data-align=\"left\">Homogeneiza\u00e7\u00e3o (&deg;C)<\/th><th class=\"has-text-align-left\" data-align=\"left\">Extrus\u00e3o (&deg;C)<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">1XXX<\/td><td class=\"has-text-align-left\" data-align=\"left\">640 a 650<\/td><td class=\"has-text-align-left\" data-align=\"left\">560 a 605<\/td><td class=\"has-text-align-left\" data-align=\"left\">450 a 550<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">2XXX<\/td><td class=\"has-text-align-left\" data-align=\"left\">500 a 650<\/td><td class=\"has-text-align-left\" data-align=\"left\">480 a 530<\/td><td class=\"has-text-align-left\" data-align=\"left\">400 a 480<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3XXX<\/td><td class=\"has-text-align-left\" data-align=\"left\">630 a 645<\/td><td class=\"has-text-align-left\" data-align=\"left\">530 a 620<\/td><td class=\"has-text-align-left\" data-align=\"left\">480 a 520<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">5XXX<\/td><td class=\"has-text-align-left\" data-align=\"left\">570 a 630<\/td><td class=\"has-text-align-left\" data-align=\"left\">380 a 550<\/td><td class=\"has-text-align-left\" data-align=\"left\">400 a 480<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">6XXX<\/td><td class=\"has-text-align-left\" data-align=\"left\">580 a 620<\/td><td class=\"has-text-align-left\" data-align=\"left\">560 a 600<\/td><td class=\"has-text-align-left\" data-align=\"left\">430 a 500<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">7XXX<\/td><td class=\"has-text-align-left\" data-align=\"left\">acima de 500<\/td><td class=\"has-text-align-left\" data-align=\"left\">400 a 500<\/td><td class=\"has-text-align-left\" data-align=\"left\">390 a 450<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Temperaturas t\u00edpicas de solidus, homogeneiza\u00e7\u00e3o e extrus\u00e3o por s\u00e9rie de liga. A faixa de extrus\u00e3o \u00e9 a temperatura do tarugo no in\u00edcio do curso, n\u00e3o a temperatura na matriz.<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Duas coisas nessa tabela determinam como uma prensa \u00e9 operada. A faixa 7xxx, de 390 a 450 &deg;C, fica cerca de 60 &deg;C abaixo da faixa 6xxx e se sobrep\u00f5e \u00e0 regi\u00e3o em que a 6xxx ainda \u00e9 r\u00edgida demais para extrudar bem. E a largura da janela n\u00e3o \u00e9 proporcional \u00e0 temperatura: a 2xxx abrange 80 &deg;C, a 6xxx abrange 70 &deg;C e a 7xxx abrange 60 &deg;C, mas a janela 7xxx \u00e9 a que \u00e9 limitada pela fus\u00e3o incipiente no topo, porque seu solidus est\u00e1 apenas logo acima da faixa de trabalho.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">A 6xxx tem uma mudan\u00e7a de patamar no solvus<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Nas ligas 6xxx, o limite que importa n\u00e3o \u00e9 a temperatura do tarugo, mas a temperatura que o perfil atinge na sa\u00edda da matriz. Esse limite se desloca dependendo de o Mg e o Si estarem em solu\u00e7\u00e3o quando o tarugo entra na matriz. Se o tarugo \u00e9 aquecido diretamente at\u00e9 a faixa de trabalho e permanece abaixo do solvus, o Mg2Si ainda est\u00e1 presente como part\u00edculas e o perfil falha mais cedo. Se o tarugo passa acima do solvus, ou \u00e9 superaquecido e resfriado rapidamente, o Mg e o Si est\u00e3o em solu\u00e7\u00e3o e o perfil pode operar 20 a 30 &deg;C mais quente antes da fus\u00e3o incipiente.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Liga<\/th><th class=\"has-text-align-left\" data-align=\"left\">Limite do perfil com Mg2Si presente<\/th><th class=\"has-text-align-left\" data-align=\"left\">Limite do perfil com Mg e Si em solu\u00e7\u00e3o<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">6060<\/td><td class=\"has-text-align-left\" data-align=\"left\">590 &deg;C<\/td><td class=\"has-text-align-left\" data-align=\"left\">620 &deg;C<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">6063<\/td><td class=\"has-text-align-left\" data-align=\"left\">591 &deg;C<\/td><td class=\"has-text-align-left\" data-align=\"left\">612 &deg;C<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">6082<\/td><td class=\"has-text-align-left\" data-align=\"left\">570 &deg;C<\/td><td class=\"has-text-align-left\" data-align=\"left\">595 &deg;C<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Temperatura da superf\u00edcie do perfil na qual a superf\u00edcie falha, para tarugos aquecidos abaixo e acima do solvus. O solvus \u00e9 de cerca de 475 &deg;C para o 6060 e de cerca de 540 &deg;C para o 6082.<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Esse \u00e9 um ponto de pr\u00e1tica de prensa, n\u00e3o uma curiosidade metal\u00fargica. Uma oficina que pr\u00e9-aquece diretamente a 460 &deg;C no 6060 est\u00e1 processando a liga com part\u00edculas presentes e pagando por isso com um teto mais baixo, embora 460 &deg;C esteja confortavelmente dentro da faixa publicada de 430 a 500 &deg;C. O limite superior \u00e9 definido pelo que o metal carrega para dentro da matriz, n\u00e3o pelo gr\u00e1fico.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">O controle de temperatura \u00e9 resultado, n\u00e3o arruma\u00e7\u00e3o<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Como a janela \u00e9 estreita, a precis\u00e3o do controle define a velocidade. Os n\u00fameros publicados s\u00e3o diretos: controle dentro de mais ou menos 20 &deg;C, e a velocidade de prensa constante \u00f3tima cai cerca de 10 por cento em rela\u00e7\u00e3o a uma opera\u00e7\u00e3o perfeitamente isot\u00e9rmica. Deixe o controle derivar para mais ou menos 50 &deg;C, e o n\u00famero \u00e9 uma redu\u00e7\u00e3o de 50 por cento. A temperatura de sa\u00edda da matriz \u00e9 o que importa, e n\u00e3o \u00e9 a mesma que a temperatura do tarugo no forno, porque o trabalho de deforma\u00e7\u00e3o adiciona calor ao longo do curso.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c9 por isso que a extrus\u00e3o isot\u00e9rmica vale a instrumenta\u00e7\u00e3o. Para manter a temperatura de sa\u00edda constante enquanto o tarugo esfria contra o container e aquece sob deforma\u00e7\u00e3o, o pist\u00e3o precisa desacelerar ao longo do curso, e \u00e9 por isso que as rampas de velocidade s\u00e3o programadas em vez de fixadas. Uma prensa operando a uma velocidade de pist\u00e3o constante n\u00e3o \u00e9, por defini\u00e7\u00e3o, isot\u00e9rmica.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">A press\u00e3o de pico ocupa parte da janela<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O outro limite \u00e9 a capacidade da prensa, e n\u00e3o \u00e9 a carga em regime permanente. Uma press\u00e3o de pico ou de rompimento \u00e9 necess\u00e1ria para iniciar o movimento do tarugo, e ela fica acima do valor em regime permanente que os c\u00e1lculos usuais fornecem. Quando o pico \u00e9 inclu\u00eddo, a taxa de extrus\u00e3o m\u00e1xima dispon\u00edvel a uma dada press\u00e3o e velocidade de pist\u00e3o cai quase 40 por cento em rela\u00e7\u00e3o ao valor calculado apenas com a press\u00e3o em regime permanente. Uma prensa que parece adequada pelo n\u00famero em regime permanente pode, portanto, ficar sem capacidade no in\u00edcio de cada curso, o que se manifesta como um travamento em um tarugo longo ou uma liga dura, e n\u00e3o como um limite de press\u00e3o limpo.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">O que a janela faz com a matriz<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A matriz fica na extremidade quente de tudo isso. Em uma prensa de alum\u00ednio, a zona de trabalho opera a cerca de 1050 &deg;F (565 &deg;C) sem lubrifica\u00e7\u00e3o, contra um metal que adere ao a\u00e7o, e a temperatura de trabalho \u00e9 o que for\u00e7a a escolha do grau: o H13 e seu equivalente europeu 1.2344 s\u00e3o usados no mundo todo porque mant\u00eam dureza e resist\u00eancia ao revenido nessa temperatura, e porque respondem \u00e0 nitreta\u00e7\u00e3o. Um grau que seria adequado para uma matriz de trabalho a frio perde dureza na zona de trabalho e se deforma, e o perfil deriva antes que a matriz mostre desgaste vis\u00edvel.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A rela\u00e7\u00e3o tamb\u00e9m funciona no sentido inverso. Tudo o que eleva a temperatura de sa\u00edda encurta a vida da matriz: temperatura de tarugo mais alta, pist\u00e3o mais r\u00e1pido, zona de trabalho mais longa, matriz mais fria que precisa ser aquecida pelo trabalho. A p\u00e1gina de superf\u00edcie deste site descreve o que acontece quando a zona de trabalho fica quente demais; a p\u00e1gina de desgaste descreve o que a zona de trabalho perde.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">O que isso significa para um pedido de a\u00e7o para matrizes<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O grau para extrus\u00e3o \u00e9 um a\u00e7o cromo para trabalho a quente, AISI H13 e seu equivalente europeu 1.2344, fornecido recozido para que a oficina de matrizes possa usin\u00e1-lo, temper\u00e1-lo e reveni-lo, e nitretar a zona de trabalho. O programa 1.2344 ESR para ferramental de extrus\u00e3o est\u00e1 em <a href=\"https:\/\/aobosteel.com\/pt\/1-2344-esr-h13-aluminum-extrusion-distributors\/\">p\u00e1gina de fornecimento de extrus\u00e3o 1.2344 ESR H13<\/a>, o grau em <a href=\"https:\/\/aobosteel.com\/pt\/h13-tool-steel\/\">p\u00e1gina do a\u00e7o ferramenta H13<\/a>, e a camada no <a href=\"https:\/\/aobosteel.com\/pt\/tool-steel-nitriding-guide\/\">p\u00e1gina de nitreta\u00e7\u00e3o de a\u00e7o ferramenta<\/a>. O que sai da superf\u00edcie quando a matriz opera quente demais est\u00e1 em <a href=\"https:\/\/aobosteel.com\/pt\/aluminum-extrusion-pick-up-and-die-lines\/\">p\u00e1gina de linhas de pick-up e de molde<\/a>, a zona de trabalho que controla a entrada de calor em <a href=\"https:\/\/aobosteel.com\/pt\/aluminum-extrusion-die-bearing-length\/\">p\u00e1gina de comprimento de apoio da matriz<\/a>, o grau por componente no <a href=\"https:\/\/aobosteel.com\/pt\/best-tool-steels-for-aluminum-extrusion-dies\/\">p\u00e1gina de sele\u00e7\u00e3o de a\u00e7o para matriz de extrus\u00e3o<\/a>, e a corre\u00e7\u00e3o que segue um teste no <a href=\"https:\/\/aobosteel.com\/pt\/aluminum-extrusion-die-correction\/\">p\u00e1gina de corre\u00e7\u00e3o de matriz de extrus\u00e3o<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Antes de ajustar uma prensa com base nestas faixas<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Estas s\u00e3o faixas publicadas para ligas comerciais, n\u00e3o ajustes para uma prensa ou perfil espec\u00edfico. A temperatura de extrus\u00e3o que funciona em um dado trabalho depende da liga, da taxa de extrus\u00e3o, da forma, do container e da matriz, e a faixa publicada \u00e9 o envelope, n\u00e3o o alvo. Os limites de temperatura do perfil s\u00e3o para as ligas e condi\u00e7\u00f5es de pr\u00e9-aquecimento espec\u00edficas da fonte. Os ajustes finais s\u00e3o estabelecidos na prensa.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Fonte: Extrusion of Aluminium Alloys, T. Sheppard, Kluwer Academic Publishers, 1999, Tabela 5.1 e se\u00e7\u00f5es 5.1 a 5.10, com a temperatura de trabalho da zona de trabalho de Aluminum Extrusion Technology, P. K. Saha, ASM International, 2000.<\/p>","protected":false},"excerpt":{"rendered":"<p>Aluminum Extrusion Temperature: The Window, the Alloy Series, and What It Costs the Die Every alloy series has an extrusion temperature range, and the range is narrow. Below it the press runs out of pressure; above it the surface fails or the metal starts to melt at the grain boundaries. The window is set by [&hellip;]<\/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":"default","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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