{"id":68,"date":"2026-05-28T08:28:50","date_gmt":"2026-05-28T08:28:50","guid":{"rendered":"https:\/\/journals.utgjiu.ro\/JFD\/?post_type=articol&#038;p=68"},"modified":"2026-05-28T08:28:50","modified_gmt":"2026-05-28T08:28:50","slug":"study-of-the-carburization-of-a-hypoeutectoid-steel-0-20-c-and-its-influence-on-microstructure","status":"publish","type":"articol","link":"https:\/\/journals.utgjiu.ro\/JFD\/articol\/study-of-the-carburization-of-a-hypoeutectoid-steel-0-20-c-and-its-influence-on-microstructure\/","title":{"rendered":"Study Of the Carburization of a Hypoeutectoid Steel (~0.20% C) And Its Influence on Microstructure"},"content":{"rendered":"<p>The paper presents the study of the diffusion phenomenon in metallic materials and its application in the carburizing process of hypoeutectoid steels. The fundamental mechanisms of atomic diffusion are analyzed, namely vacancy diffusion and interstitial diffusion, as well as the influence of temperature on atomic mobility. Based on Fick\u2019s second law, non-steady-state diffusion is addressed, establishing the relationship between concentration, time, and the penetration depth of the diffusing element.<br \/>\nThe theoretical study is complemented by a calculation example of the time required for carburizing a steel with 0.25% C, in order to obtain a carbon concentration of 0.80% at a depth of 0.5 mm, at a temperature of 950\u00b0C. The obtained result indicates a treatment time of approximately 7 hours.<br \/>\nIn the experimental part, carburizing of a C22 steel in a methane atmosphere was carried out, followed by metallographic analysis. The microstructure shows the formation of a carburized surface layer consisting of high-carbon martensite, a transition zone with a mixed structure, and a ferrite-pearlite core. The high hardness of the surface layer confirms the effectiveness of the treatment.<br \/>\nThe results demonstrate that the carburizing process enables an optimal balance between surface hardness and core toughness.<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"class_list":["post-68","articol","type-articol","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/journals.utgjiu.ro\/JFD\/wp-json\/wp\/v2\/articol\/68","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/journals.utgjiu.ro\/JFD\/wp-json\/wp\/v2\/articol"}],"about":[{"href":"https:\/\/journals.utgjiu.ro\/JFD\/wp-json\/wp\/v2\/types\/articol"}],"wp:attachment":[{"href":"https:\/\/journals.utgjiu.ro\/JFD\/wp-json\/wp\/v2\/media?parent=68"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}