{"id":115960,"date":"2022-05-08T12:23:59","date_gmt":"2022-05-08T11:23:59","guid":{"rendered":"https:\/\/material-properties.org\/quest-ce-que-la-martensite-trempee-definition\/"},"modified":"2022-05-11T07:28:53","modified_gmt":"2022-05-11T06:28:53","slug":"quest-ce-que-la-martensite-trempee-definition","status":"publish","type":"post","link":"https:\/\/material-properties.org\/fr\/quest-ce-que-la-martensite-trempee-definition\/","title":{"rendered":"Qu&rsquo;est-ce que la martensite tremp\u00e9e &#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\">La martensite tremp\u00e9e est constitu\u00e9e des phases stables de ferrite et de c\u00e9mentite.\u00a0La martensite tremp\u00e9e peut \u00eatre presque aussi dure et r\u00e9sistante que la martensite, mais avec une ductilit\u00e9 et une t\u00e9nacit\u00e9 consid\u00e9rablement am\u00e9lior\u00e9es.<\/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><a href=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/martensite-microstructure-quenching-1024x594.png\"><img decoding=\"async\" loading=\"lazy\" class=\"alignright wp-image-30200\" src=\"https:\/\/material-properties.org\/wp-content\/uploads\/2020\/07\/martensite-microstructure-quenching-1024x594.png\" alt=\"Martensite\" width=\"480\" height=\"279\" \/><\/a><span>La martensite<\/span><\/strong><span>\u00a0est une structure m\u00e9tastable tr\u00e8s dure avec une structure cristalline t\u00e9tragonale centr\u00e9e sur le corps (BCT).\u00a0La martensite se forme dans les aciers lorsque la vitesse de refroidissement de l&rsquo;aust\u00e9nite est si \u00e9lev\u00e9e que les atomes de carbone n&rsquo;ont pas le temps de se diffuser hors de la structure cristalline en quantit\u00e9 suffisante pour former de la c\u00e9mentite (Fe<\/span><sub><span>3<\/span><\/sub><span>C).\u00a0C&rsquo;est donc un produit de\u00a0<\/span><strong><span>transformation sans diffusion<\/span><\/strong><span>.\u00a0Toute diffusion, quelle qu&rsquo;elle soit, entra\u00eene la formation de phases de ferrite et de c\u00e9mentite.\u00a0Il porte le nom du m\u00e9tallurgiste allemand\u00a0<\/span><strong><span>Adolf Martens<\/span><\/strong><span>\u00a0(1850-1914).<\/span><\/p>\n<h2><span>Martensite tremp\u00e9e<\/span><\/h2>\n<p><span>La capacit\u00e9 relative d&rsquo;un alliage ferreux \u00e0 former de la martensite est appel\u00e9e trempabilit\u00e9.\u00a0La trempabilit\u00e9 est couramment mesur\u00e9e comme la distance sous une surface tremp\u00e9e \u00e0 laquelle le m\u00e9tal pr\u00e9sente une duret\u00e9 sp\u00e9cifique de 50 HRC, par exemple, ou un pourcentage sp\u00e9cifique de martensite dans la microstructure.\u00a0La duret\u00e9 la plus \u00e9lev\u00e9e d&rsquo;un acier perlitique est de 43 HRC alors que la martensite peut atteindre 72 HRC.\u00a0<\/span><strong><span>Martensite fra\u00eeche <\/span><\/strong><span>est tr\u00e8s fragile si la teneur en carbone est sup\u00e9rieure \u00e0 environ 0,2 \u00e0 0,3 %.\u00a0Il est si fragile qu&rsquo;il ne peut pas \u00eatre utilis\u00e9 pour la plupart des applications.\u00a0Cette fragilit\u00e9 peut \u00eatre supprim\u00e9e (avec une certaine perte de duret\u00e9) si l&rsquo;acier tremp\u00e9 est l\u00e9g\u00e8rement chauff\u00e9 dans un processus connu sous le nom de revenu.\u00a0La trempe est r\u00e9alis\u00e9e en chauffant un acier martensitique \u00e0 une temp\u00e9rature inf\u00e9rieure \u00e0 l&rsquo;eutecto\u00efde pendant une p\u00e9riode de temps sp\u00e9cifi\u00e9e (par exemple entre 250 \u00b0C et 650 \u00b0C).<\/span><\/p>\n<p><span>Ce traitement thermique de revenu permet, par des proc\u00e9d\u00e9s diffusionnels, la formation de martensite revenue, selon la r\u00e9action:<\/span><\/p>\n<p><span>martensite (BCT, monophas\u00e9) \u2192 martensite revenu (ferrite + phases Fe<\/span><sub><span>3<\/span><\/sub><span>C)<\/span><\/p>\n<p><span>o\u00f9 la martensite monophasique BCT, sursatur\u00e9e en carbone, se transforme en\u00a0<\/span><strong><span>martensite tremp\u00e9e<\/span><\/strong><span>, compos\u00e9e des phases stables de ferrite et de c\u00e9mentite.\u00a0Sa microstructure est similaire \u00e0 la microstructure de la sph\u00e9ro\u00efdite, mais dans ce cas, la martensite tremp\u00e9e contient des particules de c\u00e9mentite extr\u00eamement petites et uniform\u00e9ment dispers\u00e9es int\u00e9gr\u00e9es dans une matrice de ferrite continue.\u00a0La martensite tremp\u00e9e peut \u00eatre presque aussi dure et r\u00e9sistante que la martensite, mais avec une ductilit\u00e9 et une t\u00e9nacit\u00e9 sensiblement am\u00e9lior\u00e9es.<\/span><\/p>\n<p><span>La r\u00e9sistance \u00e0 la traction ultime de\u00a0 l&rsquo;acier\u00a0<strong>inoxydable\u00a0<\/strong><\/span><strong><span>martensitique\u00a0<\/span><\/strong><span>\u00a0&#8211; le grade 440C \u00a0est de 760 MPa.<\/span><\/p>\n<h3><span id=\"Hardness_of_Martensitic_Stainless_Steel\"><span>Duret\u00e9\u00a0<\/span><\/span><\/h3>\n<p><span>La duret\u00e9 Brinell de l&rsquo;acier <strong>inoxydable\u00a0<\/strong><\/span><strong><span>martensitique <\/span><\/strong><span>&#8211; Grade 440C est d&rsquo;environ 270 MPa.<\/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>Martensite<a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-science\/phase-diagrams-of-iron-carbon-system\/martensite\/\" class=\"su-button su-button-style-fond plat\" style=\"color:#606060;background-color:#2D89EF;border-color:#246ec0;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:#6cadf4;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><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>Nous esp\u00e9rons que cet article,\u00a0<\/span><strong><span>Tremp\u00e9 Martensite<\/span><\/strong><span>, vous aide.\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>Nous esp\u00e9rons que cet article,\u00a0Tremp\u00e9 Martensite, vous aide.\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>Qu&#039;est-ce que la martensite tremp\u00e9e - D\u00e9finition | Propri\u00e9t\u00e9s mat\u00e9rielles<\/title>\n<meta name=\"description\" content=\"La martensite tremp\u00e9e se compose des phases stables de ferrite et de c\u00e9mentite. 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