{"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\/it\/whats-18ni-maraging-steel\/","title":{"rendered":"Cos\u2019\u00e8 l\u2019acciaio 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\u2019acciaio maraging \u00e8 un tipo di acciaio ad altissima resistenza, basato sul ferro-nichel Martensite privo di carbonio o con un basso tenore di carbonio, che viene prodotto invecchiando i metalli per precipitarlo e indurirlo. I gradi di acciaio maraging 18Ni(200), 18Ni(250) e 18Ni(300) presentano una resistenza alla trazione di 1400, 1700 e 1900 MPa, ottenuti da INCO mediante l\u2019aggiunta di diversi contenuti di Co, Mo e Ti all\u2019alluminio-nichel Martensite tramite invecchiamento e indurimento. Gli acciai 18Ni(200) e 18Ni(250) <a href=\"https:\/\/wldstainless.com\/materials\/martensitic-stainless-steel\/15-5ph-stainless-steel\/\">Acciai<\/a> Sono state applicate per la prima volta alla carcassa del motore a razzo o a particolari requisiti in cui sono necessarie caratteristiche di resistenza ultra elevate. La resistenza dell\u2019acciaio Maraging non deriva dal carbonio, ma dalla precipitazione di composti intermetallici. L\u2019acciaio AISI 18Ni \u00e8 la qualit\u00e0 rappresentativa dell\u2019acciaio Maraging. La resistenza alla trazione dell\u2019acciaio pu\u00f2 essere suddivisa in:<\/p>\n<table style=\"height: 147px;\" width=\"498\">\n<tbody>\n<tr>\n<td><strong>AISI<\/strong><\/td>\n<td><strong>Valutazione<\/strong><\/td>\n<td><strong>UNS<\/strong><\/td>\n<td><strong>GB<\/strong><\/td>\n<\/tr>\n<tr>\n<td>18Ni(200)<\/td>\n<td>Maraging 200<\/td>\n<td>K92810<\/td>\n<td>00Ni18Co8Mo3TiAl<\/td>\n<\/tr>\n<tr>\n<td>18Ni(250)<\/td>\n<td>Maraging 250<\/td>\n<td>K92890<\/td>\n<td>00Ni18Co8Mo5TiAl<\/td>\n<\/tr>\n<tr>\n<td>18Ni(300)<\/td>\n<td>Maraging 300<\/td>\n<td>K93120<\/td>\n<td>00Ni18Co9Mo5TiAl<\/td>\n<\/tr>\n<tr>\n<td>18Ni(350)<\/td>\n<td>Maraging 350<\/td>\n<td>K93160<\/td>\n<td>00Ni18Co12Mo4Ti2Al<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>La composizione chimica dell'acciaio Maraging 18Ni (MIL-S-46850D)<\/h3>\n<table>\n<tbody>\n<tr>\n<td width=\"81\"><strong>Valutazioni<\/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\">Valutazione 200<\/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\">Valutazione 250<\/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\">Grado 300<\/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\">Grado 350<\/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>Dopo la soluzione solida, 18Ni<a href=\"https:\/\/wldstainless.com\/materials\/martensitic-stainless-steel\/15-5ph-stainless-steel\/\"> acciaio<\/a> forma un Martensite ultra-a basso tenore di carbonio con una durezza di 28~30HRC. Dopo il trattamento di invecchiamento, si indurisce per effetto della dissoluzione e della precipitazione di vari composti intermetallici. La durezza pu\u00f2 aumentare fino a 50HRC. La caratteristica eccellente dell\u2019acciaio 18Ni \u00e8 che mantiene ancora una buona resistenza alla trazione e una elevata resistenza alla frattura anche in presenza di una resistenza alla trazione e una durezza ultra elevate. Allo stesso tempo, non presenta indurimento a freddo, deformazioni da trattamento termico di invecchiamento ridotte e un buon comportamento di saldatura; la superficie dei metalli pu\u00f2 essere trattata con nitruro.<\/p>\n<p>L'acciaio maraging 18Ni \u00e8 una combinazione perfetta di alta resistenza e durezza, buona resistenza alla trazione e plasticit\u00e0. \u00c8 ampiamente utilizzato nell'aviazione, nell'aerospaziale, nella lavorazione di stampi di precisione e in altri campi industriali, come la scocca dei motori dei razzi, le scocche dei missili, i cilindri ad alta velocit\u00e0 rotanti per centrifughe isotopiche di uranio e altre parti di elevata precisione che devono sopportare carichi.<\/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":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"The Maraging steel grades18Ni(200), 18Ni(250) and 18Ni(300) steels with a yield strength of 1400, 1700 and 1900 MPa were obtained by INCO by adding different contents of Co, Mo and Ti into the Fe-Ni Martensitic alloy through aging hardening.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"WLD Stainless\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/wldstainless.com\/it\/whats-18ni-maraging-steel\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.1.1\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/wldstainless.com\\\/it\\\/whats-18ni-maraging-steel\\\/#article\",\"name\":\"What\\u2019s 18Ni Maraging steel? 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