{"id":2009,"date":"2021-01-20T15:24:33","date_gmt":"2021-01-20T14:24:33","guid":{"rendered":"https:\/\/www.redhillballs.com\/?page_id=2009"},"modified":"2025-09-29T19:38:30","modified_gmt":"2025-09-29T17:38:30","slug":"billes-en-acier-rapide-m50","status":"publish","type":"page","link":"https:\/\/www.redhillballs.com\/fr\/produits\/billes-en-metaux-non-ferreux-et-alliages\/billes-en-acier-rapide-m50\/","title":{"rendered":"Billes en acier rapide M50"},"content":{"rendered":"<h2>\ud83d\udee0\ufe0f <a href=\"https:\/\/en.wikipedia.org\/wiki\/Tool_steel\">Billes en acier rapide M50 \u2013 duret\u00e9 \u00e0 chaud &amp; fiabilit\u00e9 des roulements<\/a><\/h2>\n<p>Les billes en acier rapide M50 sont con\u00e7ues pour des roulements \u00e0 tr\u00e8s grande vitesse et haute temp\u00e9rature. L\u2019alliage Cr\u2013Mo\u2013V d\u00e9veloppe une matrice de martensite revenue avec des carbures stables, offrant une duret\u00e9 \u00e0 chaud remarquable, une excellente r\u00e9sistance \u00e0 l\u2019usure et une longue dur\u00e9e de fatigue\u2014id\u00e9ales l\u00e0 o\u00f9 l\u2019AISI 52100 atteint ses limites (broches a\u00e9ronautiques, accessoires de turbines, machines-outils \u00e0 grande vitesse).<\/p>\n<h3>\ud83d\udd27 Sp\u00e9cifications techniques cl\u00e9s<\/h3>\n<ul>\n<li><strong>Composition<\/strong> : C 0,80\u20130,85 %, Cr 4,0\u20134,3 %, Mo 4,0\u20134,5 %, V 1,0\u20131,2 % (Si, Mn faibles ; reste Fe)<\/li>\n<li><strong>Structure<\/strong> : martensite revenue avec carbures d\u2019alliage finement dispers\u00e9s<\/li>\n<li><strong>Duret\u00e9<\/strong> : Rockwell C 60\u201366 (apr\u00e8s traitement thermique)<\/li>\n<li><strong>R\u00e9sistance \u00e0 la traction<\/strong> : jusqu\u2019\u00e0 \u2248 2 200\u20132 400 MPa (selon l\u2019\u00e9tat)<\/li>\n<li><strong>Densit\u00e9<\/strong> : ~7,80\u20137,85 g\/cm\u00b3<\/li>\n<li><strong>Capacit\u00e9 thermique<\/strong> : conserve duret\u00e9\/r\u00e9sistance \u00e0 haute temp\u00e9rature<\/li>\n<li><strong>Corrosion<\/strong> : limit\u00e9e ; utiliser lubrification\/rev\u00eatements en milieux corrosifs<\/li>\n<li><strong>Magn\u00e9tique<\/strong> : enti\u00e8rement magn\u00e9tiques<\/li>\n<\/ul>\n<h3>\u2705 Avantages des Billes en acier rapide M50<\/h3>\n<ul>\n<li><strong>Duret\u00e9 \u00e0 chaud &amp; r\u00e9sistance \u00e0 l\u2019usure<\/strong> pour service grande vitesse<\/li>\n<li><strong>Excellente dur\u00e9e de fatigue<\/strong> sous charges cycliques<\/li>\n<li><strong>Stabilit\u00e9 dimensionnelle<\/strong> apr\u00e8s traitement thermique<\/li>\n<li><strong>Faible friction<\/strong> avec bon \u00e9tat de surface et lubrification<\/li>\n<\/ul>\n<h3>\ud83d\udd04 Applications<\/h3>\n<ul>\n<li><strong>Roulements a\u00e9ronautiques<\/strong> : accessoires de turbines, broches grande vitesse<\/li>\n<li><strong>Machines-outils de pr\u00e9cision<\/strong> : broches de rectifieuses\/fraiseuses<\/li>\n<li><strong>M\u00e9canismes haute temp\u00e9rature<\/strong> et instrumentation<\/li>\n<\/ul>\n<h3>\ud83d\udce6 Qualit\u00e9s &amp; dimensions disponibles<\/h3>\n<ul>\n<li><a href=\"https:\/\/www.redhillballs.com\/company\/precision-grades\/\"><strong>Qualit\u00e9s<\/strong> : ISO 3290, DIN 5401, AFBMA (tol\u00e9rances \u00e9quivalentes)<\/a><\/li>\n<li><strong>Plage de diam\u00e8tres<\/strong> : imp\u00e9rial et m\u00e9trique standard ; hors standard\/sur mesure sur demande<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\ud83d\udee0\ufe0f Billes en acier rapide M50 \u2013 duret\u00e9 \u00e0 chaud &amp; fiabilit\u00e9 des roulements Les billes en acier rapide M50 sont con\u00e7ues pour des roulements \u00e0 tr\u00e8s grande vitesse et haute temp\u00e9rature. L\u2019alliage Cr\u2013Mo\u2013V d\u00e9veloppe une matrice de martensite revenue avec des carbures stables, offrant une duret\u00e9 \u00e0 chaud remarquable, une excellente r\u00e9sistance \u00e0 l\u2019usure [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":8772,"parent":1991,"menu_order":9,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2009","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.8 (Yoast SEO v28.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Billes en acier rapide M50 \u2013 Duret\u00e9, pr\u00e9cision et fiabilit\u00e9<\/title>\n<meta name=\"description\" content=\"Billes en acier rapide M50 : haute duret\u00e9, r\u00e9sistance \u00e0 l\u2019usure et pr\u00e9cision, id\u00e9ales pour roulements et applications m\u00e9caniques\" \/>\n<meta name=\"robots\" content=\"index, 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