{"id":2114,"date":"2021-03-09T09:03:34","date_gmt":"2021-03-09T09:03:34","guid":{"rendered":"https:\/\/wldstainless.com\/?p=2114"},"modified":"2021-03-09T12:46:29","modified_gmt":"2021-03-09T12:46:29","slug":"whats-18ni-maraging-steel","status":"publish","type":"post","link":"https:\/\/wldstainless.com\/fr\/whats-18ni-maraging-steel\/","title":{"rendered":"Qu&#039;est-ce que l&#039;acier Maraging 18Ni ?"},"content":{"rendered":"<section class=\"av_textblock_section\"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'   itemprop=\"text\" ><p>L&#039;acier Maraging est un type d&#039;acier \u00e0 ultra-haute r\u00e9sistance, il est \u00e0 base de martensite Fe-Ni sans carbone ou \u00e0 tr\u00e8s faible teneur en carbone comme matrice et fait vieillir les compos\u00e9s m\u00e9talliques pour pr\u00e9cipiter et durcir. Les nuances d&#039;acier Maraging 18Ni(200), 18Ni(250) et 18Ni(300) avec une limite d&#039;\u00e9lasticit\u00e9 de 1400, 1700 et 1900 MPa ont \u00e9t\u00e9 obtenues par INCO en ajoutant diff\u00e9rentes teneurs en Co, Mo et Ti dans le mat\u00e9riau martensitique Fe-Ni. alliage par vieillissement durcissement. Le 18Ni(200) et le 18Ni(250) <a href=\"https:\/\/wldstainless.com\/materials\/martensitic-stainless-steel\/15-5ph-stainless-steel\/\">aciers<\/a> ont \u00e9t\u00e9 appliqu\u00e9s pour la premi\u00e8re fois \u00e0 la coque du moteur-fus\u00e9e ou \u00e0 certaines exigences particuli\u00e8res n\u00e9cessitant une r\u00e9sistance ultra-\u00e9lev\u00e9e. La r\u00e9sistance de l\u2019acier Maraging ne vient pas du carbone mais de la pr\u00e9cipitation de compos\u00e9s interm\u00e9talliques. L&#039;acier AISI 18Ni est la nuance repr\u00e9sentative de l&#039;acier Maraging. La r\u00e9sistance \u00e0 la traction de l\u2019acier peut \u00eatre divis\u00e9e en :<\/p>\n<table style=\"height: 147px;\" width=\"498\">\n<tbody>\n<tr>\n<td><strong>AISI<\/strong><\/td>\n<td><strong>Grade<\/strong><\/td>\n<td><strong>UNS<\/strong><\/td>\n<td><strong>FR<\/strong><\/td>\n<\/tr>\n<tr>\n<td>18Ni(200)<\/td>\n<td>Marage 200<\/td>\n<td>K92810<\/td>\n<td>00Ni18Co8Mo3TiAl<\/td>\n<\/tr>\n<tr>\n<td>18Ni(250)<\/td>\n<td>Marage 250<\/td>\n<td>K92890<\/td>\n<td>00Ni18Co8Mo5TiAl<\/td>\n<\/tr>\n<tr>\n<td>18Ni(300)<\/td>\n<td>Marage 300<\/td>\n<td>K93120<\/td>\n<td>00Ni18Co9Mo5TiAl<\/td>\n<\/tr>\n<tr>\n<td>18Ni(350)<\/td>\n<td>Marage 350<\/td>\n<td>K93160<\/td>\n<td>00Ni18Co12Mo4Ti2Al<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>La composition chimique de l&#039;acier Maraging 18Ni (MIL-S-46850D)<\/h3>\n<table>\n<tbody>\n<tr>\n<td width=\"81\"><strong>Notes<\/strong><\/td>\n<td width=\"77\"><strong>C<\/strong><\/td>\n<td width=\"77\"><strong>Si<\/strong><\/td>\n<td width=\"77\"><strong>Mn<\/strong><\/td>\n<td width=\"77\"><strong>P.<\/strong><\/td>\n<td width=\"77\"><strong>S<\/strong><\/td>\n<td width=\"77\"><strong>Ni<\/strong><\/td>\n<td width=\"77\"><strong>Co<\/strong><\/td>\n<td width=\"77\"><strong>Mo<\/strong><\/td>\n<td width=\"77\"><strong>Ti<\/strong><\/td>\n<td width=\"77\"><strong>Al<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"81\">200e ann\u00e9e<\/td>\n<td width=\"77\">\u22640,03<\/td>\n<td width=\"77\">\u22640,10<\/td>\n<td width=\"77\">\u22640,10<\/td>\n<td width=\"77\">\u22640,01<\/td>\n<td width=\"77\">\u22640,01<\/td>\n<td width=\"77\">17.0~19.0<\/td>\n<td width=\"77\">8.0~9.0<\/td>\n<td width=\"77\">3.0~3.5<\/td>\n<td width=\"77\">0.15~0.25<\/td>\n<td width=\"77\">0.05~0.15<\/td>\n<\/tr>\n<tr>\n<td width=\"81\">250e ann\u00e9e<\/td>\n<td width=\"77\">\u22640,03<\/td>\n<td width=\"77\">\u22640,10<\/td>\n<td width=\"77\">\u22640,10<\/td>\n<td width=\"77\">\u22640,01<\/td>\n<td width=\"77\">\u22640,01<\/td>\n<td width=\"77\">17.0~19.0<\/td>\n<td width=\"77\">7.0~8.5<\/td>\n<td width=\"77\">4.6~5.2<\/td>\n<td width=\"77\">0.3~0.5<\/td>\n<td width=\"77\">0.05~0.15<\/td>\n<\/tr>\n<tr>\n<td width=\"81\">300e ann\u00e9e<\/p>\n<p>&amp;300A<\/td>\n<td width=\"77\">\u22640,03<\/td>\n<td width=\"77\">\u22640,10<\/td>\n<td width=\"77\">\u22640,10<\/td>\n<td width=\"77\">\u22640,01<\/td>\n<td width=\"77\">\u22640,01<\/td>\n<td width=\"77\">18.0~19.0<\/td>\n<td width=\"77\">8.5~9.5<\/td>\n<td width=\"77\">4.6~5.2<\/td>\n<td width=\"77\">0.5~0.8<\/td>\n<td width=\"77\">0.05~0.15<\/td>\n<\/tr>\n<tr>\n<td width=\"81\">350e ann\u00e9e<\/td>\n<td width=\"77\">\u22640,03<\/td>\n<td width=\"77\">\u22640,10<\/td>\n<td width=\"77\">\u22640,10<\/td>\n<td width=\"77\">\u22640,01<\/td>\n<td width=\"77\">\u22640,01<\/td>\n<td width=\"77\">18.0~19.0<\/td>\n<td width=\"77\">11.5~12.5<\/td>\n<td width=\"77\">4.6~5.2<\/td>\n<td width=\"77\">1.3~1.6<\/td>\n<td width=\"77\">0.05~0.15<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Apr\u00e8s solution solide, 18Ni<a href=\"https:\/\/wldstainless.com\/materials\/martensitic-stainless-steel\/15-5ph-stainless-steel\/\"> acier<\/a> forme de la martensite \u00e0 tr\u00e8s faible teneur en carbone avec une duret\u00e9 de 28 ~ 30HRC. Apr\u00e8s traitement de vieillissement, il subit un durcissement d\u00fb au vieillissement en raison de la dissolution et de la pr\u00e9cipitation de divers compos\u00e9s interm\u00e9talliques. La duret\u00e9 peut augmenter jusqu&#039;\u00e0 50HRC. L&#039;excellente caract\u00e9ristique de l&#039;acier 18Ni est qu&#039;il pr\u00e9sente toujours une bonne t\u00e9nacit\u00e9 et une t\u00e9nacit\u00e9 \u00e9lev\u00e9e \u00e0 la rupture dans des conditions de tr\u00e8s haute r\u00e9sistance et de duret\u00e9 \u00e9lev\u00e9e. En m\u00eame temps, c&#039;est sans durcissement \u00e0 froid, petite d\u00e9formation de traitement thermique de vieillissement, bonnes performances de soudage, la surface des m\u00e9taux peut \u00eatre un traitement de nitruration.<\/p>\n<p>L&#039;acier maraging 18Ni est une combinaison parfaite de haute r\u00e9sistance et duret\u00e9, d&#039;une bonne t\u00e9nacit\u00e9 et d&#039;une bonne plasticit\u00e9. Il a \u00e9t\u00e9 largement utilis\u00e9 dans l&#039;aviation, l&#039;a\u00e9rospatiale, les moules de pr\u00e9cision et d&#039;autres domaines industriels, tels que la coque de moteur de fus\u00e9e, la coque de missile, le cylindre rotatif \u00e0 grande vitesse de centrifugeuse isotopique d&#039;uranium et d&#039;autres pi\u00e8ces porteuses de haute pr\u00e9cision du mat\u00e9riau.<\/p>\n<\/div><\/section>","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":2080,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[],"class_list":["post-2114","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/wldstainless.com\/fr\/wp-json\/wp\/v2\/posts\/2114","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wldstainless.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wldstainless.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wldstainless.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wldstainless.com\/fr\/wp-json\/wp\/v2\/comments?post=2114"}],"version-history":[{"count":1,"href":"https:\/\/wldstainless.com\/fr\/wp-json\/wp\/v2\/posts\/2114\/revisions"}],"predecessor-version":[{"id":2115,"href":"https:\/\/wldstainless.com\/fr\/wp-json\/wp\/v2\/posts\/2114\/revisions\/2115"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wldstainless.com\/fr\/wp-json\/wp\/v2\/media\/2080"}],"wp:attachment":[{"href":"https:\/\/wldstainless.com\/fr\/wp-json\/wp\/v2\/media?parent=2114"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wldstainless.com\/fr\/wp-json\/wp\/v2\/categories?post=2114"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wldstainless.com\/fr\/wp-json\/wp\/v2\/tags?post=2114"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}