{"id":119667,"date":"2023-02-07T23:28:21","date_gmt":"2023-02-07T22:28:21","guid":{"rendered":"https:\/\/material-properties.org\/quais-sao-as-propriedades-termicas-das-ligas-de-zinco-definicao\/"},"modified":"2023-02-14T12:44:58","modified_gmt":"2023-02-14T11:44:58","slug":"quais-sao-as-propriedades-termicas-das-ligas-de-zinco-definicao","status":"publish","type":"post","link":"https:\/\/material-properties.org\/pt-br\/quais-sao-as-propriedades-termicas-das-ligas-de-zinco-definicao\/","title":{"rendered":"Quais s\u00e3o as propriedades t\u00e9rmicas das ligas de zinco &#8211; Defini\u00e7\u00e3o"},"content":{"rendered":"<p><span><div class=\"su-quote su-quote-style-default\"><div class=\"su-quote-inner su-u-clearfix su-u-trim\">Propriedades T\u00e9rmicas de Ligas de Zinco.\u00a0O ponto de fus\u00e3o da liga de zinco \u2013 Zamak 3 \u00e9 em torno de 385\u00b0C.\u00a0A condutividade t\u00e9rmica da liga de zinco \u2013 Zamak 3 \u00e9 de 113 W\/(mK).<\/div><\/div><\/span><\/p>\n<p><span><div class=\"su-divider su-divider-style-dotted\" style=\"margin:15px 0;border-width:2px;border-color:#999999\"><\/div><\/span><\/p>\n<p><span><div  class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\">\n<p><strong><span>O zinco<\/span><\/strong><span>\u00a0\u00e9 um metal fr\u00e1gil e tem um\u00a0<\/span><strong><span>ponto de fus\u00e3o relativamente baixo<\/span><\/strong><span> de 419\u00b0C (787\u00b0F), resiste \u00e0 corros\u00e3o, \u00e9 d\u00factil e male\u00e1vel e \u00e9 altamente sol\u00favel em cobre. Zinco e ligas de zinco s\u00e3o usados \u200b\u200bna forma de revestimentos, pe\u00e7as fundidas, chapas laminadas, fios trefilados, pe\u00e7as forjadas e extrus\u00f5es.\u00a0Outros usos do zinco s\u00e3o como constituinte principal em ligas de n\u00edquel-prata de lat\u00e3o, metal de m\u00e1quina de escrever, solda macia e de alum\u00ednio e bronze comercial.<\/span><\/p>\n<p><span>As ligas de zinco com pequenas quantidades de cobre, alum\u00ednio e magn\u00e9sio s\u00e3o \u00fateis na\u00a0<\/span><strong><span>fundi\u00e7\u00e3o sob press\u00e3o<\/span><\/strong><span>, bem como na fundi\u00e7\u00e3o por rota\u00e7\u00e3o, especialmente nas ind\u00fastrias automotiva, el\u00e9trica e de hardware.\u00a0As ligas de zinco t\u00eam pontos de fus\u00e3o baixos, requerem entrada de calor relativamente baixa, n\u00e3o requerem fluxo ou atmosferas protetoras.\u00a0Devido \u00e0 sua\u00a0<\/span><strong><span>alta fluidez<\/span><\/strong><span>, as ligas de zinco podem ser fundidas em paredes muito mais finas do que outras ligas fundidas sob press\u00e3o e podem ser fundidas sob press\u00e3o com toler\u00e2ncias dimensionais mais r\u00edgidas.\u00a0Estas\u00a0<\/span><strong><span>ligas de zinco<\/span><\/strong><span>\u00a0s\u00e3o comercializadas sob o nome\u00a0<\/span><strong><span>Zamak<\/span><\/strong><span>.\u00a0O nome zamak \u00e9 um acr\u00f4nimo dos nomes alem\u00e3es dos metais que comp\u00f5em as ligas: Zink (zinco), Aluminium, Magnesium e Kupfer (cobre).\u00a0O baixo ponto de fus\u00e3o junto com a baixa viscosidade da liga possibilita a produ\u00e7\u00e3o de formas pequenas e intrincadas.<\/span><\/p>\n<h2><span>Zamac &#8211; Zamac 3<\/span><\/h2>\n<p><strong><span>Os fardos <\/span><\/strong><span>\u00e9 uma fam\u00edlia de ligas com um metal base de zinco e elementos de liga de alum\u00ednio, magn\u00e9sio e cobre.\u00a0As ligas de zinco com pequenas quantidades de cobre, alum\u00ednio e magn\u00e9sio s\u00e3o \u00fateis na fundi\u00e7\u00e3o sob press\u00e3o, bem como na fundi\u00e7\u00e3o por rota\u00e7\u00e3o, especialmente nas ind\u00fastrias automotiva, el\u00e9trica e de hardware.\u00a0As ligas de zinco t\u00eam pontos de fus\u00e3o baixos, requerem entrada de calor relativamente baixa, n\u00e3o requerem fluxo ou atmosferas protetoras.\u00a0Devido \u00e0 sua alta fluidez, as ligas de zinco podem ser fundidas em paredes muito mais finas do que outras ligas fundidas sob press\u00e3o e podem ser fundidas sob press\u00e3o com toler\u00e2ncias dimensionais mais r\u00edgidas.\u00a0Estas ligas de zinco s\u00e3o comercializadas sob o nome Zamak.\u00a0O nome zamak \u00e9 um acr\u00f4nimo dos nomes alem\u00e3es dos metais que comp\u00f5em as ligas: Zink (zinco), Aluminium, Magnesium e Kupfer (cobre).<\/span><\/p>\n<p><span>Por exemplo,\u00a0<\/span><strong><span>Zamak 3 (ASTM AG40A)<\/span><\/strong><span>, ou Liga de Zinco 3, \u00e9 a liga de zinco mais amplamente utilizada na ind\u00fastria de fundi\u00e7\u00e3o sob press\u00e3o de zinco e geralmente \u00e9 a primeira escolha quando se considera o zinco para fundi\u00e7\u00e3o sob press\u00e3o por v\u00e1rios motivos.\u00a0Ele fornece a melhor combina\u00e7\u00e3o geral de resist\u00eancia, fundibilidade, estabilidade dimensional, facilidade de acabamento e custo.<\/span><\/p>\n<ul>\n<li><span>Excelentes propriedades f\u00edsicas e mec\u00e2nicas<\/span><\/li>\n<li><span>Excelente fundibilidade e estabilidade dimensional a longo prazo<\/span><\/li>\n<li><span>Excelentes caracter\u00edsticas de acabamento para revestimento, pintura e tratamentos de cromagem<\/span><\/li>\n<li><span>Excelente capacidade de amortecimento e atenua\u00e7\u00e3o de vibra\u00e7\u00e3o em compara\u00e7\u00e3o com ligas de alum\u00ednio fundido<\/span><\/li>\n<\/ul>\n<p><span>As aplica\u00e7\u00f5es t\u00edpicas incluem fundi\u00e7\u00e3o sob press\u00e3o, como pe\u00e7as automotivas, eletrodom\u00e9sticos e acess\u00f3rios, equipamentos de escrit\u00f3rio e de inform\u00e1tica, hardware de constru\u00e7\u00e3o.<\/span><\/p>\n<p><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/Zamak-3-zinc-alloy-composition.png\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-29890\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/Zamak-3-zinc-alloy-composition.png\" alt=\"Cargas 3 - liga de zinco\" width=\"723\" height=\"82\" \/><\/a><\/p>\n<h2><span>Propriedades T\u00e9rmicas das Ligas de Zinco \u2013 Zamak 3<\/span><\/h2>\n<p><strong><span>As propriedades t\u00e9rmicas<\/span><\/strong><span> dos materiais referem-se \u00e0 resposta dos materiais \u00e0s mudan\u00e7as de\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/<a href=\"https:\/\/modern-physics.org\/thermodynamics\/\">thermodynamics<\/a>\/thermodynamic-properties\/what-is-temperature-physics\/&#8221;><span>temperatura<\/span><span>\u00a0e \u00e0 aplica\u00e7\u00e3o de\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/heat-transfer\/introduction-to-heat-transfer\/heat-in-physics-definition-of-heat\/\"><span>calor<\/span><\/a><span>.\u00a0\u00c0 medida que um s\u00f3lido absorve\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/<a href=\"https:\/\/modern-physics.org\/thermodynamics\/\">thermodynamics<\/a>\/what-is-energy-physics\/&#8221;><span>energia<\/span><span>\u00a0na forma de calor, sua temperatura aumenta e suas dimens\u00f5es aumentam.\u00a0Mas\u00a0<\/span><strong><span>diferentes materiais reagem<\/span><\/strong><span>\u00a0\u00e0 aplica\u00e7\u00e3o de calor\u00a0<\/span><strong><span>de forma diferente<\/span><\/strong><span>.<\/span><\/p>\n<p><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-science\/material-properties\/thermal-properties-of-materials\/specific-heat-capacity-of-materials\/\"><span>A capacidade t\u00e9rmica<\/span><\/a><span>,\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-science\/material-properties\/thermal-properties-of-materials\/coefficient-of-thermal-expansion-of-materials\/\"><span>a expans\u00e3o t\u00e9rmica<\/span><\/a><span>\u00a0e\u00a0<\/span><a href=\"https:\/\/www.thermal-engineering.org\/what-is-thermal-conductivity-definition\/\"><span>a condutividade t\u00e9rmica<\/span><\/a><span>\u00a0s\u00e3o propriedades frequentemente cr\u00edticas no uso pr\u00e1tico de s\u00f3lidos.<\/span><\/p>\n<h3><span>Ponto de Fus\u00e3o das Ligas de Zinco \u2013 Zamak 3<\/span><\/h3>\n<p><span>O ponto de fus\u00e3o da\u00a0<\/span><strong><span>liga de zinco \u2013 Zamak 3<\/span><\/strong><span>\u00a0\u00e9 em torno de 385\u00b0C.<\/span><\/p>\n<p><span>Em geral, <\/span><strong><span>a fus\u00e3o<\/span><\/strong><span> \u00e9 uma\u00a0<\/span><strong><span>mudan\u00e7a de fase<\/span><\/strong><span> de uma subst\u00e2ncia da fase s\u00f3lida para a fase l\u00edquida. O\u00a0<\/span><a href=\"https:\/\/material-properties.org\/melting-point-of-chemical-elements\/\"><strong><span>ponto de fus\u00e3o<\/span><\/strong><\/a><span> de uma subst\u00e2ncia \u00e9 a temperatura na qual ocorre essa mudan\u00e7a de fase. O\u00a0<\/span><strong><span>ponto de fus\u00e3o <\/span><\/strong><span>tamb\u00e9m define uma condi\u00e7\u00e3o na qual o s\u00f3lido e o l\u00edquido podem existir em equil\u00edbrio.<\/span><\/p>\n<h3><span>Condutividade T\u00e9rmica de Ligas de Zinco \u2013 Zamak 3<\/span><\/h3>\n<p><span>A condutividade t\u00e9rmica da\u00a0<\/span><strong><span>liga de zinco \u2013 Zamak 3<\/span><\/strong><span>\u00a0\u00e9 de 113 W\/(mK).<\/span><\/p>\n<p><span>As caracter\u00edsticas de transfer\u00eancia de calor de um material s\u00f3lido s\u00e3o medidas por uma propriedade chamada <\/span><a href=\"https:\/\/www.thermal-engineering.org\/what-is-thermal-conductivity-definition\/\"><strong><span>condutividade t\u00e9rmica<\/span><\/strong><\/a><span>, k (ou \u03bb), medida em <\/span><strong><span>W\/mK<\/span><\/strong><span>. \u00c9 uma medida da capacidade de uma subst\u00e2ncia de transferir calor atrav\u00e9s de um material por\u00a0<\/span><a href=\"https:\/\/www.thermal-engineering.org\/what-is-thermal-conduction-heat-conduction-definition\/\"><span>condu\u00e7\u00e3o<\/span><\/a><span>. Observe que\u00a0<\/span><a href=\"https:\/\/www.thermal-engineering.org\/what-is-fouriers-law-of-thermal-conduction-definition\/\"><strong><span>a lei de Fourier<\/span><\/strong><\/a><span> se aplica a toda mat\u00e9ria, independentemente de seu estado (s\u00f3lido, l\u00edquido ou gasoso), portanto, tamb\u00e9m \u00e9 definida para l\u00edquidos e gases.<\/span><\/p>\n<p><span>A <\/span><a href=\"https:\/\/www.thermal-engineering.org\/what-is-thermal-conductivity-definition\/\"><strong><span>condutividade t\u00e9rmica<\/span><\/strong><\/a><span> da maioria dos l\u00edquidos e s\u00f3lidos varia com a temperatura.\u00a0Para vapores, tamb\u00e9m depende da press\u00e3o.\u00a0Em geral:<\/span><\/p>\n<p><a href=\"https:\/\/www.nuclear-power.com\/wp-content\/uploads\/2017\/10\/thermal-conductivity-definition.png\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-20041\" src=\"https:\/\/www.nuclear-power.com\/wp-content\/uploads\/2017\/10\/thermal-conductivity-definition.png\" alt=\"condutividade t\u00e9rmica - defini\u00e7\u00e3o\" width=\"225\" height=\"75\" \/><\/a><\/p>\n<p><span>A maioria dos materiais s\u00e3o quase homog\u00eaneos, portanto podemos geralmente escrever <\/span><strong><span>k = k (T)<\/span><\/strong><span>.\u00a0Defini\u00e7\u00f5es semelhantes est\u00e3o associadas \u00e0s condutividades t\u00e9rmicas nas dire\u00e7\u00f5es y e z (ky, kz), mas para um material isotr\u00f3pico a condutividade t\u00e9rmica \u00e9 independente da dire\u00e7\u00e3o de transfer\u00eancia, kx = ky = kz = k.<\/span><\/p>\n<p><span><\/span><\/p><\/div><\/div><\/span><\/p>\n<p><span><div  class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\">\n<p><span><div class=\"su-accordion su-u-trim\"><div class=\"su-spoiler su-spoiler-style-default su-spoiler-icon-plus\" data-scroll-offset=\"0\" data-anchor-in-url=\"no\"><div class=\"su-spoiler-title\" tabindex=\"0\" role=\"button\"><span class=\"su-spoiler-icon\"><\/span>Refer\u00eancias:<\/div><div class=\"su-spoiler-content su-u-clearfix su-u-trim\">Ci\u00eancia dos Materiais:<\/div><\/div><\/div><\/span><\/p>\n<p><span>Departamento de Energia dos EUA, Ci\u00eancia de Materiais.\u00a0DOE Fundamentals Handbook, Volume 1 e 2. Janeiro de 1993.<\/span><br \/>\n<span>Departamento de Energia dos EUA, Ci\u00eancia de Materiais.\u00a0DOE Fundamentals Handbook, Volume 2 e 2. Janeiro de 1993.<\/span><br \/>\n<span>William D. Callister, David G. Rethwisch.\u00a0Ci\u00eancia e Engenharia de Materiais: Uma Introdu\u00e7\u00e3o 9\u00aa Edi\u00e7\u00e3o, Wiley;\u00a09 edi\u00e7\u00e3o (4 de dezembro de 2013), ISBN-13: 978-1118324578.<\/span><br \/>\n<span>Eberhart, Mark (2003).\u00a0Por que as coisas quebram: entendendo o mundo pela maneira como ele se desfaz.\u00a0Harmonia.\u00a0ISBN 978-1-4000-4760-4.<\/span><br \/>\n<span>Gaskell, David R. (1995).\u00a0Introdu\u00e7\u00e3o \u00e0 Termodin\u00e2mica dos Materiais (4\u00aa ed.).\u00a0Editora Taylor e Francis.\u00a0ISBN 978-1-56032-992-3.<\/span><br \/>\n<span>Gonz\u00e1lez-Vi\u00f1as, W. &amp; Mancini, HL (2004).\u00a0Uma Introdu\u00e7\u00e3o \u00e0 Ci\u00eancia dos Materiais.\u00a0Princeton University Press.\u00a0ISBN 978-0-691-07097-1.<\/span><br \/>\n<span>Ashby, Michael;\u00a0Hugh Shercliff;\u00a0David Cebon (2007).\u00a0Materiais: engenharia, ci\u00eancia, processamento e design (1\u00aa ed.).\u00a0Butterworth-Heinemann.\u00a0ISBN 978-0-7506-8391-3.<\/span><br \/>\n<span>JR Lamarsh, AJ Baratta, Introdu\u00e7\u00e3o \u00e0 Engenharia Nuclear, 3\u00aa ed., Prentice-Hall, 2001, ISBN: 0-201-82498-1.<\/span><br \/>\n<span><\/span><\/p><\/div><\/div><div class=\"su-divider su-divider-style-dotted\" style=\"margin:15px 0;border-width:2px;border-color:#999999\"><\/div><div class=\"su-divider su-divider-style-default\" style=\"margin:15px 0;border-width:2px;border-color:#999999\"><\/div><div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\"><\/div><\/div><div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\">\n<p><span>Veja acima:<\/span><br \/>\n<span>Ligas de zinco<a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/metals-what-are-metals\/alloys-composition-properties-of-metal-alloys\/zinc-alloys\/ \" class=\"su-button su-button-style-flat\" style=\"color:#606060;background-color:#ffffff;border-color:#cccccc;border-radius:10px;-moz-border-radius:10px;-webkit-border-radius:10px\" target=\"_self\"><span style=\"color:#606060;padding:7px 20px;font-size:16px;line-height:24px;border-color:#ffffff;border-radius:10px;-moz-border-radius:10px;-webkit-border-radius:10px;text-shadow:0px 0px 0px #000000;-moz-text-shadow:0px 0px 0px #000000;-webkit-text-shadow:0px 0px 0px #000000\"><i class=\"sui sui-link\" style=\"font-size:16px;color:#5d5d5d\"><\/i> <\/span><\/a><\/span><\/p><\/div><\/div><div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\"><\/div><\/div><\/span><\/p>\n<p><span><div class=\"su-divider su-divider-style-dotted\" style=\"margin:15px 0;border-width:2px;border-color:#999999\"><\/div><\/span><\/p>\n<p><span>Esperamos que este artigo,\u00a0<\/span><strong><span>Propriedades T\u00e9rmicas das Ligas de Zinco<\/span><\/strong><span>, o ajude.\u00a0Se sim,\u00a0<\/span><strong><span>d\u00ea um like<\/span><\/strong><span>\u00a0na barra lateral.\u00a0O objetivo principal deste site \u00e9 ajudar o p\u00fablico a aprender algumas informa\u00e7\u00f5es interessantes e importantes sobre materiais e suas propriedades.<\/span><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Esperamos que este artigo,\u00a0Propriedades T\u00e9rmicas das Ligas de Zinco, o ajude.\u00a0Se sim,\u00a0d\u00ea um like\u00a0na barra lateral.\u00a0O objetivo principal deste site \u00e9 ajudar o p\u00fablico a aprender algumas informa\u00e7\u00f5es interessantes e importantes sobre materiais e suas propriedades. &nbsp;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[53],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Quais s\u00e3o as propriedades t\u00e9rmicas das ligas de zinco - Defini\u00e7\u00e3o | Propriedades do material<\/title>\n<meta name=\"description\" content=\"Propriedades T\u00e9rmicas das Ligas de Zinco. 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O ponto de fus\u00e3o da liga de zinco \u2013 Zamak 3 \u00e9 em torno de 385\u00b0C. 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