{"id":102,"date":"2017-12-28T15:27:16","date_gmt":"2017-12-28T12:27:16","guid":{"rendered":"https:\/\/metallsmaster.ru\/?p=102"},"modified":"2021-08-21T12:40:58","modified_gmt":"2021-08-21T09:40:58","slug":"alyuminij-i-splavy","status":"publish","type":"post","link":"https:\/\/metallsmaster.pro\/pt\/alyuminij-e-splavy\/","title":{"rendered":"Alum\u00ednio e ligas"},"content":{"rendered":"<p><strong>Alum\u00ednio <\/strong>\u00c9 usado para fabricar diversas pe\u00e7as e ligas \u00e0 base dele. Durante o estudo e a aplica\u00e7\u00e3o deste metal, foi desenvolvida uma tecnologia para seu processamento. A liga \u00e9 usada para conferir as propriedades necess\u00e1rias ao material. Este processo envolve o estado fundido, <strong>alum\u00ednio <\/strong>misturado com derretimentos de elementos adicionais.<\/p>\n<blockquote><p>A Citylom oferece os melhores pre\u00e7os para reciclagem de lat\u00e3o em Moscou e na regi\u00e3o de Moscou:\u00a0<a href=\"https:\/\/citylom.ru\/priem-alyuminiya\" target=\"_blank\" rel=\"noopener\" data-saferedirecturl=\"https:\/\/www.google.com\/url?q=https:\/\/citylom.ru\/priem-alyuminiya&amp;source=gmail&amp;ust=1629624898245000&amp;usg=AFQjCNEGddns1_KUA5mnf5y_ICXvVs3ULg\">https:\/\/citylom.ru\/priem-<wbr \/>alum\u00ednio<\/a><\/p><\/blockquote>\n<p>Este processo melhora a qualidade dos produtos metal\u00fargicos. Dependendo das propor\u00e7\u00f5es escolhidas e dos elementos complementares, as propriedades qu\u00edmicas, mec\u00e2nicas e f\u00edsicas do metal mudam. Hoje, o metal puro <strong>alum\u00ednio<\/strong> Praticamente n\u00e3o \u00e9 utilizado na ind\u00fastria devido \u00e0 sua baixa resist\u00eancia. As ligas, no entanto, t\u00eam encontrado ampla utiliza\u00e7\u00e3o, e suas propor\u00e7\u00f5es e tecnologias de processamento est\u00e3o em constante aprimoramento. <strong>Soldagem de alum\u00ednio<\/strong> \u00c9 realizada utilizando uma m\u00e1quina de arco pontual ou de arg\u00f4nio; tamb\u00e9m \u00e9 utilizada soldagem a arco el\u00e9trico.<\/p>\n<h2>\n\t<!--<div class='top-banner-pages'>\t\n\n\t<\/div>--->\n\t<\/h2>\n<h2>Propriedades b\u00e1sicas do alum\u00ednio<\/h2>\n<p>Os principais fatores que determinam a ampla gama de utiliza\u00e7\u00e3o de qualquer material s\u00e3o suas propriedades e indicadores de desempenho. <strong>Ligas \u00e0 base de alum\u00ednio<\/strong> s\u00e3o usados em quase todas as \u00e1reas de atividade. A raz\u00e3o simples para tal preval\u00eancia \u00e9 <strong>Propriedades b\u00e1sicas do alum\u00ednio<\/strong>, que est\u00e3o listados.<\/p>\n<p>&nbsp;<\/p>\n<ul>\n<li>densidade - 2,7 g\/cm\u00b3<\/li>\n<li>o ponto de fus\u00e3o do alum\u00ednio t\u00e9cnico \u00e9 658 \u00b0C;<\/li>\n<li>o ponto de fus\u00e3o do alum\u00ednio puro \u00e9 660 \u00b0C;<\/li>\n<li>calor espec\u00edfico de fus\u00e3o \u2014 390 kJ\/kg;<\/li>\n<li>ponto de ebuli\u00e7\u00e3o - 2500 \u00b0C;<\/li>\n<li>calor espec\u00edfico de evapora\u00e7\u00e3o \u2014 10,53 MJ\/kg;<\/li>\n<li>capacidade t\u00e9rmica espec\u00edfica \u2014 880 J\/kg\u00b7K;<\/li>\n<li>a resist\u00eancia \u00e0 tra\u00e7\u00e3o do alum\u00ednio fundido \u00e9 de 10-12 kg\/mm\u00b2, a resist\u00eancia \u00e0 tra\u00e7\u00e3o do alum\u00ednio deformado \u00e9 de 18-25 kg\/mm\u00b2, a resist\u00eancia \u00e0 tra\u00e7\u00e3o das ligas \u00e9 de 38-42 kg\/mm\u00b2;<\/li>\n<li>Dureza Brinell: 24...32 kgf\/mm\u00b2;<\/li>\n<li>plasticidade de grau t\u00e9cnico - 35 %;<\/li>\n<li>plasticidade do puro - 50 %;<\/li>\n<li>M\u00f3dulo de Young\u201470 GPa;<\/li>\n<li>O alum\u00ednio tem alta condutividade el\u00e9trica (37 10<sup>6<\/sup>\u00a0Cm\/m) e condutividade t\u00e9rmica (203,5 W\/(m K)), 65 % da condutividade el\u00e9trica do cobre, tem alta refletividade de luz;<\/li>\n<li>Paramagn\u00e9tico fraco;<\/li>\n<li>Coeficiente t\u00e9rmico de expans\u00e3o linear 24,58\u00b710<sup>-6<\/sup>PARA<sup>-1<\/sup>\u00a0(20\u2026200 \u00b0C);<\/li>\n<li>Resist\u00eancia espec\u00edfica 0,0262..0,0295 Ohm mm\u00b2\/m;<\/li>\n<li>Coeficiente de temperatura da resist\u00eancia el\u00e9trica 4,3 x 10<sup>-3<\/sup>K<sup>-1<\/sup>O alum\u00ednio se torna supercondutor a 1,2 Kelvin.<\/li>\n<\/ul>\n<p>Uma propriedade importante que distingue <strong>ligas \u00e0 base de alum\u00ednio<\/strong> \u2014 alta ductilidade. Pode ser facilmente laminado em folhas, o que \u00e9 especialmente importante para uso em eletr\u00f4nica e engenharia el\u00e9trica. O material pode ser facilmente processado com baixas for\u00e7as mec\u00e2nicas. Seu baixo ponto de fus\u00e3o permite a refundi\u00e7\u00e3o e a fabrica\u00e7\u00e3o de pe\u00e7as de liga de alum\u00ednio com consumo m\u00ednimo de energia, reduzindo os custos de produ\u00e7\u00e3o e o custo do pr\u00f3prio produto.<\/p>\n<h3>\n<!---<div class='top-banner-pages'>\n\n<\/div>-->\n\n\t<\/h3>\n<h3>Graus de alum\u00ednio de acordo com GOST<\/h3>\n<p><strong>Alum\u00ednio<\/strong> e suas ligas, assim como outros metais, s\u00e3o rotulados de acordo com padr\u00f5es estabelecidos. Assim, existem <strong>graus de alum\u00ednio de acordo com GOST, <\/strong>que s\u00e3o fornecidos nas listas.<\/p>\n<p><strong>Ligas de alum\u00ednio forjado:<\/strong><\/p>\n<p>Endurecimento tratado termicamente:<\/p>\n<ul>\n<li><strong>Duralum\u00ednio <\/strong>D1, D16, D20*, ligas de alum\u00ednio-cobre-mangan\u00eas [Al-Cu-Mg];<\/li>\n<li>Liga avial (AV);<\/li>\n<li>Liga de alta resist\u00eancia (B95);<\/li>\n<li>Ligas para forjamento e estampagem (AK6, AK8, AK4-1 [resistentes ao calor]).<\/li>\n<\/ul>\n<p>N\u00e3o endurec\u00edvel por tratamento t\u00e9rmico:<\/p>\n<ul>\n<li>Ligas de alum\u00ednio-mangan\u00eas (AMts);<\/li>\n<li>Ligas de alum\u00ednio com magn\u00e9sio (AMg2, AMg3, AMg5, AMg6).<\/li>\n<\/ul>\n<p><strong>Fundi\u00e7\u00e3o de ligas de alum\u00ednio para fundi\u00e7\u00e3o moldada:<\/strong><\/p>\n<ul>\n<li>Ligas de alum\u00ednio-sil\u00edcio (<strong>silumin \/<\/strong>) Al-Si (AL2, AL4, AL9) - alta densidade de pe\u00e7as fundidas, f\u00e1cil de cortar, caracterizada por alto desempenho linear;<\/li>\n<li>Ligas de alum\u00ednio-cobre Al-Cu (AL7, AL19) - altas propriedades mec\u00e2nicas ap\u00f3s tratamento t\u00e9rmico, f\u00e1ceis de usinar;<\/li>\n<li>Ligas de alum\u00ednio-magn\u00e9sio Al-Mg (AL8, AL27) - maior resist\u00eancia \u00e0 corros\u00e3o, propriedades mec\u00e2nicas melhoradas, f\u00e1cil usinagem;<\/li>\n<li>Ligas de alum\u00ednio resistentes ao calor (AL1, AL21, AL33) - f\u00e1ceis de cortar, maior resist\u00eancia ao calor.<\/li>\n<\/ul>\n<p><strong>Classifica\u00e7\u00e3o em termos de facilidade de processamento mec\u00e2nico <\/strong>(Macio e d\u00factil, dif\u00edcil de usinar):<\/p>\n<ul>\n<li>Recozido - D16, AB;<\/li>\n<li>N\u00e3o endurecido por tratamento t\u00e9rmico - AMts, AMg2, AMg3, AMg5, AMg6.<\/li>\n<\/ul>\n<p>Ligas de alum\u00ednio relativamente fortes e duras, que s\u00e3o relativamente f\u00e1ceis de usinar:<\/p>\n<ul>\n<li>Endurecido e envelhecido artificialmente: D16T, D16N, AVT;<\/li>\n<li>Forjamento: AK6, AK8, AK4-1;<\/li>\n<li>Fundi\u00e7\u00e3o: AL2, AL4, AL9, AL8, AL27, AL1, AL21, AL33.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-103 size-full aligncenter\" src=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2017\/12\/alluminii_3.webp\" alt=\"Alum\u00ednio\" width=\"275\" height=\"275\" srcset=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2017\/12\/alluminii_3.webp 275w, https:\/\/metallsmaster.pro\/wp-content\/uploads\/2017\/12\/alluminii_3-150x150.webp 150w, https:\/\/metallsmaster.pro\/wp-content\/uploads\/2017\/12\/alluminii_3-190x190.webp 190w\" sizes=\"auto, (max-width: 275px) 100vw, 275px\" \/><\/p>","protected":false},"excerpt":{"rendered":"<p>O alum\u00ednio \u00e9 usado na fabrica\u00e7\u00e3o de diversos componentes e ligas \u00e0 base dele. No processo de estudo\u2026<\/p>","protected":false},"author":1,"featured_media":103,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-102","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cvetnye-metally"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0410\u043b\u044e\u043c\u0438\u043d\u0438\u0439, \u043e\u0441\u043d\u043e\u0432\u043d\u044b\u0435 \u0441\u0432\u043e\u0439\u0441\u0442\u0432\u0430 \u043c\u0435\u0442\u0430\u043b\u043b\u0430 \u0438 \u0435\u0433\u043e \u0441\u043f\u043b\u0430\u0432\u043e\u0432, \u043a\u043b\u0430\u0441\u0441\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f \u0438 \u043c\u0430\u0440\u043a\u0438\u0440\u043e\u0432\u043a\u0430\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" 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