{"id":2051,"date":"2023-03-28T13:06:39","date_gmt":"2023-03-28T13:06:39","guid":{"rendered":"https:\/\/waldunsteel.com\/?p=2051"},"modified":"2023-03-28T13:25:29","modified_gmt":"2023-03-28T13:25:29","slug":"how-to-choose-aisi-4140-steel-bar","status":"publish","type":"post","link":"https:\/\/waldunsteel.com\/fr\/comment-choisir-une-barre-en-acier-aisi-4140\/","title":{"rendered":"Comment choisir une barre en acier AISI 4140 ?"},"content":{"rendered":"<div  class='flex_column av-54vzs3-413a9ef1e56cd5c4ebb800e0aeffb402 av_two_third  avia-builder-el-0  el_before_av_one_third  avia-builder-el-first  first flex_column_div'     ><section  class='av_textblock_section av-lfs9tlx8-9767a17c821d036ba6f6b2b8509e9a05'  ><div class='avia_textblock' ><h1>Comment choisir une barre en acier AISI 4140 ?<\/h1>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-1278\" src=\"https:\/\/waldunsteel.com\/wp-content\/uploads\/2021\/03\/AISI-4140-Alloy-Steel-Round-Bars.jpg\" alt=\"barres rondes en acier alli\u00e9 aisi 4140\" width=\"495\" height=\"399\" srcset=\"https:\/\/waldunsteel.com\/wp-content\/uploads\/2021\/03\/AISI-4140-Alloy-Steel-Round-Bars.jpg 495w, https:\/\/waldunsteel.com\/wp-content\/uploads\/2021\/03\/AISI-4140-Alloy-Steel-Round-Bars-300x242.jpg 300w, https:\/\/waldunsteel.com\/wp-content\/uploads\/2021\/03\/AISI-4140-Alloy-Steel-Round-Bars-16x12.jpg 16w\" sizes=\"(max-width: 495px) 100vw, 495px\" \/><\/p>\n<p>Le choix d&#039;une barre en acier AISI 4140 implique de prendre en compte plusieurs facteurs, notamment l&#039;utilisation pr\u00e9vue, les propri\u00e9t\u00e9s m\u00e9caniques requises et le processus de fabrication.<\/p>\n<h2>Voici quelques facteurs cl\u00e9s \u00e0 prendre en compte lors de la s\u00e9lection d&#039;une barre en acier AISI 4140 :<\/h2>\n<h2>Utilisation pr\u00e9vue\u00a0:<\/h2>\n<p>D\u00e9terminer l&#039;application sp\u00e9cifique de la barre d&#039;acier. L&#039;AISI 4140 est un acier alli\u00e9 polyvalent qui est couramment utilis\u00e9 dans une vari\u00e9t\u00e9 d&#039;industries telles que l&#039;a\u00e9rospatiale, l&#039;automobile, la construction, le p\u00e9trole et le gaz. L&#039;utilisation pr\u00e9vue de la barre d&#039;acier d\u00e9terminera les propri\u00e9t\u00e9s m\u00e9caniques et la taille requises.<\/p>\n<h3>Applications pour la barre d&#039;acier AISI 4140<\/h3>\n<p>La barre en acier AISI 4140 est une barre en acier alli\u00e9 solide et polyvalente avec un rapport r\u00e9sistance\/poids \u00e9lev\u00e9, ce qui la rend id\u00e9ale pour une large gamme d&#039;applications. Il est couramment utilis\u00e9 dans les secteurs de l&#039;automobile, de l&#039;a\u00e9rospatiale, de la construction et de l&#039;agriculture. Voici quelques utilisations sp\u00e9cifiques de la barre en acier AISI 4140 :<\/p>\n<h3>Composants automobiles\u00a0:<\/h3>\n<ul>\n<li>La barre d&#039;acier AISI 4140 peut \u00eatre utilis\u00e9e pour produire des composants tels que des arbres \u00e0 cames, des fus\u00e9es d&#039;essieu, des tourillons d&#039;essieu, des vilebrequins et d&#039;autres pi\u00e8ces qui n\u00e9cessitent une r\u00e9sistance et une durabilit\u00e9 sup\u00e9rieures.<\/li>\n<\/ul>\n<h3>Composants a\u00e9rospatiaux\u00a0:<\/h3>\n<ul>\n<li>La barre d&#039;acier AISI 4140 est souvent utilis\u00e9e dans les pi\u00e8ces d&#039;avion en raison de sa capacit\u00e9 \u00e0 r\u00e9sister \u00e0 des temp\u00e9ratures et des pressions extr\u00eames. Des composants du train d&#039;atterrissage aux composants du moteur, l&#039;acier AISI 4140 est \u00e0 la hauteur de la t\u00e2che.<\/li>\n<\/ul>\n<h3>Composants de construction\u00a0:<\/h3>\n<ul>\n<li>Dans les projets de construction tels que les ponts ou les grands b\u00e2timents, les barres en acier AISI 4140 sont souvent sp\u00e9cifi\u00e9es en raison de leur excellente r\u00e9sistance structurelle et de leur r\u00e9sistance \u00e0 la corrosion.<\/li>\n<\/ul>\n<h3>Pi\u00e8ces agricoles\u00a0:<\/h3>\n<ul>\n<li>De nombreuses machines agricoles utilisent des pi\u00e8ces en barres d&#039;acier AISI 4140 en raison de leur r\u00e9sistance sup\u00e9rieure \u00e0 l&#039;usure dans les environnements difficiles. Ceux-ci incluent les go\u00fbts des moissonneuses, des semoirs, des tracteurs et des charrues.<\/li>\n<\/ul>\n<h2>Propri\u00e9t\u00e9s m\u00e9caniques:<\/h2>\n<p>La barre en acier AISI 4140 est un acier alli\u00e9 \u00e0 haute r\u00e9sistance qui offre une excellente t\u00e9nacit\u00e9 et ductilit\u00e9. Ses propri\u00e9t\u00e9s m\u00e9caniques comprennent :<\/p>\n<ul>\n<li>R\u00e9sistance \u00e0 la traction (ksi) : 135-155<\/li>\n<li>Limite d&#039;\u00e9lasticit\u00e9 (ksi): 95 min<\/li>\n<li>Allongement (% en 2\u2033) : 12 min<\/li>\n<li>Gamme de duret\u00e9 (Bhn): 288-321 max<\/li>\n<li>R\u00e9duction de surface (%) : 50 min<\/li>\n<li>Duret\u00e9 Brinell (Bhn): 293 max<\/li>\n<\/ul>\n<p>La barre en acier AISI 4140 offre une r\u00e9sistance, une t\u00e9nacit\u00e9 et une r\u00e9sistance \u00e0 l&#039;usure \u00e9lev\u00e9es. Les propri\u00e9t\u00e9s m\u00e9caniques de la barre d&#039;acier d\u00e9pendront du traitement thermique et du processus de fabrication. Le traitement thermique le plus courant pour les barres d&#039;acier AISI 4140 est la trempe et le revenu, qui consistent \u00e0 chauffer la barre d&#039;acier \u00e0 haute temp\u00e9rature, puis \u00e0 la refroidir rapidement dans de l&#039;huile ou de l&#039;eau, puis \u00e0 la tremper \u00e0 une temp\u00e9rature plus basse.<\/p>\n<h2>La taille et la forme:<\/h2>\n<p>La taille et la forme de la barre d&#039;acier d\u00e9pendront de l&#039;utilisation pr\u00e9vue et des propri\u00e9t\u00e9s m\u00e9caniques requises. La barre en acier AISI 4140 est disponible dans une vari\u00e9t\u00e9 de tailles et de formes, y compris des barres rondes, carr\u00e9es et hexagonales.<\/p>\n<h2>Qualit\u00e9 et certification :<\/h2>\n<p>Lors de la s\u00e9lection d&#039;une barre en acier AISI 4140, il est important de s&#039;assurer que l&#039;acier r\u00e9pond aux normes de qualit\u00e9 et aux certifications requises. Recherchez des barres d&#039;acier certifi\u00e9es par des organisations r\u00e9put\u00e9es telles que ASTM International ou SAE International.<\/p>\n<h2>R\u00e9putation du fournisseur :<\/h2>\n<p>Choisissez un fournisseur r\u00e9put\u00e9 qui peut fournir des barres d&#039;acier de qualit\u00e9 fiable et constante. Recherchez des fournisseurs ayant de bons ant\u00e9c\u00e9dents en mati\u00e8re de fourniture de barres en acier AISI 4140 de haute qualit\u00e9.<\/p>\n<p><strong>Dans l&#039;ensemble, la s\u00e9lection d&#039;une barre d&#039;acier AISI 4140 implique de prendre en compte l&#039;application sp\u00e9cifique, les propri\u00e9t\u00e9s m\u00e9caniques requises, la taille et la forme, la qualit\u00e9 et la certification, ainsi que la r\u00e9putation du fournisseur. En examinant attentivement ces facteurs, vous pouvez choisir la bonne barre en acier AISI 4140 pour votre application.<\/strong><\/p>\n<h2>Voici quelques questions fr\u00e9quemment pos\u00e9es (FAQ) pour les barres en acier AISI 4140 :<\/h2>\n<h2>Qu&#039;est-ce qu&#039;une barre en acier AISI 4140 ?<\/h2>\n<p>L&#039;AISI 4140 est un acier faiblement alli\u00e9 qui contient du chrome, du molybd\u00e8ne et du mangan\u00e8se. Il est couramment utilis\u00e9 dans les applications o\u00f9 une r\u00e9sistance \u00e9lev\u00e9e, une t\u00e9nacit\u00e9 et une r\u00e9sistance \u00e0 l&#039;usure et \u00e0 la fatigue sont requises, comme dans les industries automobile et a\u00e9rospatiale, le forage p\u00e9trolier et gazier et la fabrication d&#039;\u00e9quipements lourds.<\/p>\n<h2>Quelles sont les propri\u00e9t\u00e9s de la barre en acier AISI 4140 ?<\/h2>\n<p>La barre en acier AISI 4140 a une r\u00e9sistance \u00e0 la traction \u00e9lev\u00e9e, une bonne ductilit\u00e9 et une excellente t\u00e9nacit\u00e9. Il a \u00e9galement une r\u00e9sistance \u00e9lev\u00e9e \u00e0 la fatigue et une bonne r\u00e9sistance \u00e0 l&#039;usure. L&#039;acier est facilement usinable \u00e0 l&#039;\u00e9tat recuit et peut \u00eatre trait\u00e9 thermiquement pour obtenir une large gamme de propri\u00e9t\u00e9s m\u00e9caniques.<\/p>\n<h2>Quelles sont les applications de la barre en acier AISI 4140 ?<\/h2>\n<p>La barre en acier AISI 4140 est utilis\u00e9e dans une large gamme d&#039;applications, notamment\u00a0:<\/p>\n<ul>\n<li>Composants automobiles et a\u00e9rospatiaux<\/li>\n<li>\u00c9quipement de forage p\u00e9trolier et gazier<\/li>\n<li>Fabrication d&#039;\u00e9quipement lourd<\/li>\n<li>Machines agricoles<\/li>\n<li>\u00c9quipement de minage<\/li>\n<li>Machines de construction<\/li>\n<li>Outils et \u00e9quipements industriels<\/li>\n<\/ul>\n<h2>Quelles sont les tailles courantes de barres en acier AISI 4140\u00a0?<\/h2>\n<p>La barre en acier AISI 4140 est disponible dans une gamme de tailles, allant g\u00e9n\u00e9ralement de 12 mm \u00e0 100 mm de diam\u00e8tre. Il peut \u00e9galement \u00eatre fourni en diff\u00e9rentes longueurs et formes, notamment ronde, carr\u00e9e, plate et hexagonale.<\/p>\n<h2>Quels sont les diff\u00e9rents traitements thermiques pour les barres en acier AISI 4140 ?<\/h2>\n<p>La barre en acier AISI 4140 peut \u00eatre trait\u00e9e thermiquement pour obtenir une gamme de propri\u00e9t\u00e9s m\u00e9caniques, en fonction des exigences de l&#039;application. Certains des traitements thermiques courants comprennent\u00a0:<\/p>\n<p>Recuit : pour adoucir l&#039;acier et am\u00e9liorer l&#039;usinabilit\u00e9<br \/>\nNormalisation : pour am\u00e9liorer la t\u00e9nacit\u00e9 et la ductilit\u00e9<br \/>\nTrempe et revenu : pour am\u00e9liorer la r\u00e9sistance et la duret\u00e9<br \/>\nAustempering : pour am\u00e9liorer la t\u00e9nacit\u00e9 et r\u00e9duire la distorsion<br \/>\nD\u00e9tensionnement : pour r\u00e9duire les contraintes r\u00e9siduelles et am\u00e9liorer la stabilit\u00e9 dimensionnelle<\/p>\n<h2>Quels sont les avantages de l&#039;utilisation de barres en acier AISI 4140 ?<\/h2>\n<p>La barre en acier AISI 4140 offre plusieurs avantages, notamment\u00a0:<\/p>\n<ul>\n<li>Haute r\u00e9sistance et t\u00e9nacit\u00e9<\/li>\n<li>Excellente r\u00e9sistance \u00e0 l&#039;usure et \u00e0 la fatigue<\/li>\n<li>Bonne usinabilit\u00e9 et soudabilit\u00e9<\/li>\n<li>Large gamme d&#039;options de traitement thermique<\/li>\n<li>Rentable par rapport aux autres aciers \u00e0 haute r\u00e9sistance<\/li>\n<\/ul>\n<p>Voici quelques-unes des FAQ courantes li\u00e9es \u00e0 la barre d&#039;acier AISI 4140. Cependant, veuillez noter que les questions sp\u00e9cifiques peuvent varier en fonction de l&#039;application et des exigences de l&#039;industrie.<\/p>\n<\/div><\/section><\/div><div  class='flex_column av-4p95fn-71ef0673c60eaabc67ccc4ed5ad3f609 av_one_third  avia-builder-el-2  el_after_av_two_third  avia-builder-el-last  flex_column_div'     ><p><section  class='av_textblock_section av-lfs9u2xn-97d74b0435f1c7173aac81ba010a85b6'  ><div class='avia_textblock' >\n<\/div><\/section><br \/>\n<div  class='avia-builder-widget-area clearfix  avia-builder-el-4  el_after_av_textblock  avia-builder-el-last'><section id=\"portfoliobox-2\" class=\"widget clearfix avia-widget-container newsbox\"><h3 class=\"widgettitle\">derniers produits<\/h3><ul class=\"news-wrap image_size_widget\"><li class=\"news-content post-format-standard\"><div class=\"news-link\"><a class='news-thumb' title=\"Lire : Acier 60CrMoV18-5\" href=\"https:\/\/waldunsteel.com\/fr\/des-produits-2\/60crmov18-5-steel\/\"><img 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1.7006 Acier<\/a><span class=\"news-time\">24 octobre 2023 - 9h30<\/span><\/div><\/div><\/li><\/ul><span class=\"seperator extralight-border\"><\/span><\/section><section id=\"text-3\" class=\"widget clearfix widget_text\"><h3 class=\"widgettitle\">CONTACTER WALDUN STEEL<\/h3>\t\t\t<div class=\"textwidget\"><p><strong>Mobile: <\/strong><\/p>\n<p>+8618652469606<\/p>\n<p><strong>E-mail: <\/strong><\/p>\n<p>iguhongtao@gmail.com<\/p>\n<\/div>\n\t\t<span class=\"seperator extralight-border\"><\/span><\/section><section id=\"media_image-2\" class=\"widget clearfix widget_media_image\"><img decoding=\"async\" width=\"300\" height=\"158\" src=\"https:\/\/waldunsteel.com\/wp-content\/uploads\/2022\/05\/Waldun-Steel-ISO-9001-Logo-300x158-1.png\" class=\"image wp-image-1937  attachment-full size-full\" alt=\"acier waldun logo iso 9001 300x158\" style=\"max-width: 100%; height: auto;\" srcset=\"https:\/\/waldunsteel.com\/wp-content\/uploads\/2022\/05\/Waldun-Steel-ISO-9001-Logo-300x158-1.png 300w, 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