{"id":116508,"date":"2022-05-19T14:57:36","date_gmt":"2022-05-19T13:57:36","guid":{"rendered":"https:\/\/material-properties.org\/quelles-sont-les-proprietes-thermiques-de-la-fonte-definition\/"},"modified":"2022-05-20T17:25:37","modified_gmt":"2022-05-20T16:25:37","slug":"quelles-sont-les-proprietes-thermiques-de-la-fonte-definition","status":"publish","type":"post","link":"https:\/\/material-properties.org\/fr\/quelles-sont-les-proprietes-thermiques-de-la-fonte-definition\/","title":{"rendered":"Quelles sont les propri\u00e9t\u00e9s thermiques de la fonte &#8211; D\u00e9finition"},"content":{"rendered":"<p><span><div class=\"su-quote su-quote-style-default\"><div class=\"su-quote-inner su-u-clearfix su-u-trim\">Propri\u00e9t\u00e9s thermiques de la fonte &#8211; Point de fusion &#8211; Conductivit\u00e9 thermique.\u00a0En raison de sa grande fluidit\u00e9 lorsqu&rsquo;il est fondu, le fer liquide remplit facilement des moules complexes et peut former des formes complexes.<\/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<figure id=\"attachment_28878\" aria-describedby=\"caption-attachment-28878\" style=\"width: 290px\" class=\"wp-caption alignright\"><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/gray-cast-steel-exhaust.png\"><img decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-28878\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/gray-cast-steel-exhaust-300x182.png\" alt=\"fonte grise\" width=\"300\" height=\"182\" \/><\/a><figcaption id=\"caption-attachment-28878\" class=\"wp-caption-text\"><span>La fonte grise a \u00e9galement une excellente capacit\u00e9 d&rsquo;amortissement, qui est donn\u00e9e par le graphite car il absorbe l&rsquo;\u00e9nergie et la convertit en chaleur.\u00a0Une grande capacit\u00e9 d&rsquo;amortissement est souhaitable pour les mat\u00e9riaux utilis\u00e9s dans les structures o\u00f9 des vibrations ind\u00e9sirables sont induites pendant le fonctionnement, telles que les bases de machines-outils ou les vilebrequins.<\/span><\/figcaption><\/figure>\n<p><span>Dans l&rsquo;ing\u00e9nierie des mat\u00e9riaux, les\u00a0<\/span><strong><span>fontes<\/span><\/strong><span>\u00a0sont une classe d&rsquo;alliages ferreux avec une teneur en carbone\u00a0<\/span><strong><span>sup\u00e9rieure \u00e0 2,14 % en poids<\/span><\/strong><span>.\u00a0En r\u00e8gle g\u00e9n\u00e9rale, les fontes contiennent de\u00a0<\/span><strong><span>2,14 % en poids \u00e0 4,0 % en poids de carbone<\/span><\/strong><span>\u00a0et de 0,5 % en poids \u00e0 3 % en poids de\u00a0<\/span><strong><span>silicium<\/span><\/strong><span>.\u00a0Les alliages de fer \u00e0 faible teneur en carbone sont connus sous le nom d&rsquo;\u00a0<\/span><a href=\"https:\/\/material-properties.org\/what-are-steels-properties-of-steels-definition\/\"><span>acier<\/span><\/a><span>.\u00a0La diff\u00e9rence est que les fontes peuvent profiter de la\u00a0<\/span><strong><span>solidification eutectique<\/span><\/strong><span>\u00a0dans le syst\u00e8me binaire fer-carbone.\u00a0Le terme eutectique est grec pour \u00ab<\/span><strong><span>fusion facile ou bien<\/span><\/strong><span>\u00bb, et le point eutectique repr\u00e9sente la composition sur le diagramme de phase o\u00f9 la\u00a0<\/span><strong><span>temp\u00e9rature de fusion<\/span><\/strong><span>\u00a0la plus basse est atteinte.\u00a0Pour le syst\u00e8me fer-carbone, le\u00a0<\/span><strong><span>point eutectique<\/span><\/strong><span>se produit \u00e0 une composition de 4,26 % en poids C et \u00e0 une temp\u00e9rature de\u00a0<\/span><strong><span>1148 \u00b0C<\/span><\/strong><span>.<\/span><\/p>\n<p><strong><span>La fonte<\/span><\/strong><span> a donc un point de fusion plus bas (entre environ 1150 \u00b0C et 1300 \u00b0C) que l&rsquo;acier traditionnel, ce qui la rend plus facile \u00e0 couler que les aciers standards. En raison de sa grande fluidit\u00e9 lorsqu&rsquo;il est fondu, le fer liquide remplit facilement des moules complexes et peut former des formes complexes.<\/span><\/p>\n<h2><span id=\"Thermal_Properties_of_Gray_Cast_Iron_ASTM_A48_Class_40\"><span>Propri\u00e9t\u00e9s thermiques de la fonte<\/span><\/span><\/h2>\n<p><strong><span>Les propri\u00e9t\u00e9s thermiques<\/span><\/strong><span> des mat\u00e9riaux font r\u00e9f\u00e9rence \u00e0 la r\u00e9ponse des mat\u00e9riaux aux changements de leur\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\/\u00a0\u00bb><span>temp\u00e9rature<\/span><span>\u00a0et \u00e0 l&rsquo;application 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>chaleur<\/span><\/a><span>.\u00a0Lorsqu&rsquo;un solide absorbe de <\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/<a href=\"https:\/\/modern-physics.org\/thermodynamics\/\">thermodynamics<\/a>\/what-is-energy-physics\/\u00a0\u00bb><span>l&rsquo;\u00e9nergie<\/span><span> sous forme de chaleur, sa temp\u00e9rature augmente et ses dimensions augmentent.\u00a0Mais <\/span><strong><span>diff\u00e9rents mat\u00e9riaux r\u00e9agissent diff\u00e9remment\u00a0<\/span><\/strong><strong><span>\u00e0<\/span><\/strong><span>\u00a0l&rsquo;application de chaleur.<\/span><\/p>\n<h3><span id=\"Melting_Point_of_Gray_Cast_Iron_ASTM_A48_Class_40\"><span>Point de fusion des fontes<\/span><\/span><\/h3>\n<p><span>Le point de fusion de la fonte grise &#8211; Acier ASTM A48 est d&rsquo;environ 1260 \u00b0C.<\/span><\/p>\n<p><span>Le point de fusion de la fonte blanche martensitique (ASTM A532 Classe 1 Type A) est d&rsquo;environ 1260 \u00b0C.<\/span><\/p>\n<p><span>Le point de fusion de la fonte mall\u00e9able &#8211; ASTM A220 est d&rsquo;environ 1260 \u00b0C.<\/span><\/p>\n<p><span>Le point de fusion de la fonte ductile \u2013 Acier ASTM A536 \u2013 60-40-18 est d&rsquo;environ 1150 \u00b0C.<\/span><\/p>\n<p><span>En g\u00e9n\u00e9ral, la <\/span><strong><span>fusion<\/span><\/strong><span> est un\u00a0<\/span><strong><span>changement de phase<\/span><\/strong><span>\u00a0d&rsquo;une substance de la phase solide \u00e0 la phase liquide.\u00a0Le <\/span><a href=\"https:\/\/material-properties.org\/melting-point-of-chemical-elements\/\"><strong><span>point de fusion<\/span><\/strong><\/a><span>\u00a0d&rsquo;une substance est la temp\u00e9rature \u00e0 laquelle ce changement de phase se produit.\u00a0Le <\/span><strong><span>point de fusion<\/span><\/strong><span>\u00a0d\u00e9finit \u00e9galement une condition dans laquelle le solide et le liquide peuvent exister en \u00e9quilibre.<\/span><\/p>\n<h3><span id=\"Thermal_Conductivity_of_Gray_Cast_Iron_ASTM_A48_Class_40\"><span>Conductivit\u00e9 thermique des fontes<\/span><\/span><\/h3>\n<p><span>La conductivit\u00e9 thermique de la fonte grise \u2013 ASTM A48 est de 53 W\/(mK).<\/span><\/p>\n<p><span>La conductivit\u00e9 thermique de la fonte blanche martensitique (ASTM A532 Classe 1 Type A) est de 15 \u00e0 30 W\/(mK).<\/span><\/p>\n<p><span>La conductivit\u00e9 thermique de la fonte mall\u00e9able est d&rsquo;environ 40 W\/(mK).<\/span><\/p>\n<p><span>La conductivit\u00e9 thermique de la fonte ductile est de 36 W\/(mK).<\/span><\/p>\n<p><span>Les caract\u00e9ristiques de transfert de chaleur d&rsquo;un mat\u00e9riau solide sont mesur\u00e9es par une propri\u00e9t\u00e9 appel\u00e9e la <\/span><a href=\"https:\/\/www.thermal-engineering.org\/what-is-thermal-conductivity-definition\/\"><strong><span>conductivit\u00e9 thermique<\/span><\/strong><\/a><span>, k (ou \u03bb), mesur\u00e9e en <\/span><strong><span>W\/mK<\/span><\/strong><span>.\u00a0C&rsquo;est une mesure de la capacit\u00e9 d&rsquo;une substance \u00e0 transf\u00e9rer de la chaleur \u00e0 travers un mat\u00e9riau par\u00a0\u00a0<\/span><a href=\"https:\/\/www.thermal-engineering.org\/what-is-thermal-conduction-heat-conduction-definition\/\"><span>conduction<\/span><\/a><span>.\u00a0Notez que <\/span><a href=\"https:\/\/www.thermal-engineering.org\/what-is-fouriers-law-of-thermal-conduction-definition\/\"><strong><span>la loi de Fourier<\/span><\/strong><\/a><span>\u00a0s&rsquo;applique \u00e0 toute mati\u00e8re, quel que soit son \u00e9tat (solide, liquide ou gazeux), par cons\u00e9quent, elle est \u00e9galement d\u00e9finie pour les liquides et les gaz.<\/span><\/p>\n<h2><span>Solidification de la fonte<\/span><\/h2>\n<p><strong><span>La fonte<\/span><\/strong><span>\u00a0est l&rsquo;un des alliages les plus complexes utilis\u00e9s dans l&rsquo;industrie.\u00a0En raison de la teneur plus \u00e9lev\u00e9e en carbone, la structure de la fonte, contrairement \u00e0 celle de l&rsquo;acier, pr\u00e9sente une phase riche en carbone.\u00a0En fonction principalement de la composition, de la vitesse de refroidissement et du traitement \u00e0 l&rsquo;\u00e9tat fondu, la phase riche en carbone peut se solidifier avec formation d&rsquo;un eutectique stable (aust\u00e9nite-graphite) ou m\u00e9tastable (aust\u00e9nite-Fe<sub>3<\/sub>C)<\/span><span>.\u00a0<\/span><strong><span>La c\u00e9mentite (Fe<\/span><sub><span>3<\/span><\/sub><span>C)<\/span><\/strong><span>\u00a0est un compos\u00e9 m\u00e9tastable et, dans certaines circonstances, elle peut \u00eatre amen\u00e9e \u00e0 se dissocier ou \u00e0 se d\u00e9composer pour former de l&rsquo;\u03b1-ferrite et du graphite, selon la r\u00e9action :<\/span><\/p>\n<p style=\"text-align: center;\"><span>Fe<\/span><sub><span>3<\/span><\/sub><span>C \u2192 3Fe (\u03b1) + C (graphite)<\/span><\/p>\n<p><span>Ainsi, deux types de solidification eutectique peuvent se produire.\u00a0De plus, diff\u00e9rentes formes de graphite existent en fonction de la composition chimique et de la vitesse de refroidissement.\u00a0La formation de graphite est favoris\u00e9e par la pr\u00e9sence de silicium \u00e0 des concentrations sup\u00e9rieures \u00e0 environ 1 % en poids.\u00a0De plus, des vitesses de refroidissement plus lentes pendant la solidification favorisent la graphitisation (la formation de graphite).<\/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>R\u00e9f\u00e9rences :<\/div><div class=\"su-spoiler-content su-u-clearfix su-u-trim\">Science des mat\u00e9riaux:<\/div><\/div><\/div><\/span><\/p>\n<p><span>D\u00e9partement am\u00e9ricain de l&rsquo;\u00e9nergie, science des mat\u00e9riaux.\u00a0DOE Fundamentals Handbook, Volume 1 and 2. Janvier 1993.<\/span><br \/>\n<span>US Department of Energy, Material Science.\u00a0DOE Fundamentals Handbook, Volume 2 et 2. Janvier 1993.<\/span><br \/>\n<span>William D. Callister, David G. Rethwisch.\u00a0Science et g\u00e9nie des mat\u00e9riaux : une introduction 9e \u00e9dition, Wiley ;\u00a09 \u00e9dition (4 d\u00e9cembre 2013), ISBN-13\u00a0: 978-1118324578.<\/span><br \/>\n<span>En ligneEberhart, Mark (2003).\u00a0Pourquoi les choses se cassent\u00a0: Comprendre le monde par la mani\u00e8re dont il se d\u00e9compose.\u00a0Harmonie.\u00a0ISBN 978-1-4000-4760-4.<\/span><br \/>\n<span>Gaskell, David R. (1995).\u00a0Introduction \u00e0 la thermodynamique des mat\u00e9riaux (4e \u00e9d.).\u00a0\u00c9ditions Taylor et Francis.\u00a0ISBN 978-1-56032-992-3.<\/span><br \/>\n<span>Gonz\u00e1lez-Vi\u00f1as, W. &amp; Mancini, HL (2004).\u00a0Une introduction \u00e0 la science des mat\u00e9riaux.\u00a0Presse universitaire de Princeton.\u00a0ISBN 978-0-691-07097-1.<\/span><br \/>\n<span>Ashby, Michael;\u00a0Hugh Shercliff;\u00a0David Cebon (2007).\u00a0Mat\u00e9riaux: ing\u00e9nierie, science, traitement et conception (1\u00e8re \u00e9d.).\u00a0Butterworth-Heinemann.\u00a0ISBN 978-0-7506-8391-3.<\/span><br \/>\n<span>JR Lamarsh, AJ Baratta, Introduction au g\u00e9nie nucl\u00e9aire, 3e \u00e9d., 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>Voir ci-dessus:<\/span><br \/>\n<span>Fontes<a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/metals-what-are-metals\/cast-iron\/\" 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\"><img src=\"icon : lien\" alt=\"\" style=\"width:24px;height:24px\" \/> <\/span><\/a><\/span><\/p><\/div><\/div>[grille lgc_column =\u00a0\u00bb33&Prime; tablet_grid=\u00a0\u00bb33&Prime; mobile_grid=\u00a0\u00bb100&Prime; last=\u00a0\u00bbfalse\u00a0\u00bb][\/lgc_column]<\/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>Nous esp\u00e9rons que cet article,\u00a0<\/span><strong><span>Propri\u00e9t\u00e9s thermiques de la fonte<\/span><\/strong><span>, vous aidera.\u00a0Si oui,\u00a0<\/span><strong><span>donnez-nous un like<\/span><\/strong><span>\u00a0dans la barre lat\u00e9rale.\u00a0L&rsquo;objectif principal de ce site Web est d&rsquo;aider le public \u00e0 apprendre des informations int\u00e9ressantes et importantes sur les mat\u00e9riaux et leurs propri\u00e9t\u00e9s.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>[grille lgc_column =\u00a0\u00bb33&Prime; tablet_grid=\u00a0\u00bb33&Prime; mobile_grid=\u00a0\u00bb100&Prime; last=\u00a0\u00bbfalse\u00a0\u00bb][\/lgc_column] Nous esp\u00e9rons que cet article,\u00a0Propri\u00e9t\u00e9s thermiques de la fonte, vous aidera.\u00a0Si oui,\u00a0donnez-nous un like\u00a0dans la barre lat\u00e9rale.\u00a0L&rsquo;objectif principal de ce site Web est d&rsquo;aider le public \u00e0 apprendre des informations int\u00e9ressantes et importantes sur les mat\u00e9riaux et leurs propri\u00e9t\u00e9s.<\/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>Quelles sont les propri\u00e9t\u00e9s thermiques de la fonte - D\u00e9finition | Propri\u00e9t\u00e9s mat\u00e9rielles<\/title>\n<meta name=\"description\" content=\"Propri\u00e9t\u00e9s thermiques de la fonte - Point de fusion - Conductivit\u00e9 thermique. 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