{"id":47904,"date":"2025-07-01T10:00:19","date_gmt":"2025-07-01T08:00:19","guid":{"rendered":"https:\/\/www.bonomiacciai.it\/?p=47904"},"modified":"2025-06-30T15:11:45","modified_gmt":"2025-06-30T13:11:45","slug":"heat-treatments-nitriding","status":"publish","type":"post","link":"https:\/\/www.bonomiacciai.it\/en\/heat-treatments-nitriding\/","title":{"rendered":"Heat Treatments: Nitriding"},"content":{"rendered":"<div class=\"wpb-content-wrapper\">[vc_row][vc_column][vc_column_text css=&#8221;&#8221;]Nitriding is a thermo-chemical surface hardening treatment applied to steels\u2014and other alloys as well\u2014aimed at combating abrasive, adhesive, and erosive wear, rolling\/sliding contact, and mechanical or thermomechanical fatigue.<br \/>\nThis process chemically alters the steel surface by diffusing atomic nitrogen into the iron matrix, leading to the formation of nitrides.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_single_image image=&#8221;47679&#8243; add_caption=&#8221;yes&#8221; alignment=&#8221;left&#8221; onclick=&#8221;img_link_large&#8221; css=&#8221;&#8221;][\/vc_column][\/vc_row][vc_row][vc_column]<div class=\"vcex-module vcex-divider vcex-divider-solid vcex-divider-center wpex-mx-auto wpex-block wpex-h-0 wpex-border-b wpex-border-solid wpex-border-main\" style=\"border-color:#ebebeb;\"><\/div>[\/vc_column][\/vc_row][vc_row][vc_column][vc_custom_heading text=&#8221;Steels and the Hardening Mechanism&#8221; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;][vc_empty_space height=&#8221;16px&#8221;][vc_column_text css=&#8221;&#8221;]Many steels can undergo nitriding, but the process is typically applied to quenched and tempered steels or nitriding steels containing nitride-forming alloying elements such as Al, Cr, Mo, V, and Nb.<br \/>\nThese elements are responsible for the post-treatment hardness of the material.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_single_image image=&#8221;47681&#8243; add_caption=&#8221;yes&#8221; alignment=&#8221;left&#8221; onclick=&#8221;img_link_large&#8221; css=&#8221;&#8221;][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text css=&#8221;&#8221;]The resulting case depths are typically in the range of tenths of a millimetre. For hot work steels, hardness levels between 1000 and 1100 HV can be achieved.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_single_image image=&#8221;47677&#8243; add_caption=&#8221;yes&#8221; alignment=&#8221;left&#8221; onclick=&#8221;img_link_large&#8221; css=&#8221;&#8221;][\/vc_column][\/vc_row][vc_row][vc_column]<div class=\"vcex-module vcex-divider vcex-divider-solid vcex-divider-center wpex-mx-auto wpex-block wpex-h-0 wpex-border-b wpex-border-solid wpex-border-main\" style=\"border-color:#ebebeb;\"><\/div>[\/vc_column][\/vc_row][vc_row][vc_column][vc_custom_heading text=&#8221;Types of Nitriding&#8221; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;][vc_empty_space height=&#8221;16px&#8221;][vc_column_text css=&#8221;&#8221;]Nitriding can be performed using different methods, each with specific characteristics:<\/p>\n<ul>\n<li data-start=\"1203\" data-end=\"1228\">Salt Bath Nitriding<\/li>\n<li data-start=\"1203\" data-end=\"1228\">Gas Nitriding (in dissociated ammonia)<\/li>\n<li data-start=\"1203\" data-end=\"1228\">Plasma Nitriding (also called Ionic Nitriding)<\/li>\n<\/ul>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_single_image image=&#8221;47675&#8243; add_caption=&#8221;yes&#8221; alignment=&#8221;left&#8221; onclick=&#8221;img_link_large&#8221; css=&#8221;&#8221;][\/vc_column][\/vc_row][vc_row][vc_column]<div class=\"vcex-module vcex-divider vcex-divider-solid vcex-divider-center wpex-mx-auto wpex-block wpex-h-0 wpex-border-b wpex-border-solid wpex-border-main\" style=\"border-color:#ebebeb;\"><\/div>[\/vc_column][\/vc_row][vc_row][vc_column][vc_custom_heading text=&#8221;Advantages and Critical Aspects&#8221; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;][vc_empty_space height=&#8221;16px&#8221;][vc_column_text css=&#8221;&#8221;]One of the main advantages of nitriding is the low process temperature (480\u2013550\u202f\u00b0C), which avoids changes to the microstructure.<br \/>\nThis allows near-net shape components to be treated without distortion or significant dimensional changes.<\/p>\n<p>However, the process must be precisely controlled to prevent the excessive formation of nitrides, which may accumulate along grain boundaries in a network structure and increase brittleness.<\/p>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_single_image image=&#8221;47673&#8243; add_caption=&#8221;yes&#8221; onclick=&#8221;img_link_large&#8221; css=&#8221;&#8221;][\/vc_column][\/vc_row][vc_row][vc_column]<div class=\"vcex-module vcex-divider vcex-divider-solid vcex-divider-center wpex-mx-auto wpex-block wpex-h-0 wpex-border-b wpex-border-solid wpex-border-main\" style=\"border-color:#ebebeb;\"><\/div>[\/vc_column][\/vc_row][vc_row][vc_column][vc_custom_heading text=&#8221;Conclusion&#8221; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;][vc_empty_space height=&#8221;16px&#8221;][vc_column_text css=&#8221;&#8221;]\n<div class=\"flex-shrink-0 flex flex-col relative items-end\">\n<div class=\"pt-0\">\n<div class=\"gizmo-bot-avatar flex h-8 w-8 items-center justify-center overflow-hidden rounded-full\">\n<div class=\"relative p-1 rounded-sm flex items-center justify-center bg-token-main-surface-primary text-token-text-primary h-8 w-8\">\n<div class=\"flex-shrink-0 flex flex-col relative items-end\">\n<div class=\"pt-0\">\n<div class=\"gizmo-bot-avatar flex h-8 w-8 items-center justify-center overflow-hidden rounded-full\">\n<div class=\"relative p-1 rounded-sm flex items-center justify-center bg-token-main-surface-primary text-token-text-primary h-8 w-8\">\n<p data-start=\"1840\" data-end=\"2160\">Nitriding is an effective heat treatment for increasing the surface strength of steels and other alloys, without introducing significant distortion.<br data-start=\"1996\" data-end=\"1999\" \/>Selecting the correct cycle and tightly controlling process parameters is essential to achieving the desired benefits without compromising mechanical properties.<\/p>\n<p data-start=\"2162\" data-end=\"2346\"><a href=\"https:\/\/www.bonomiacciai.it\/en\/\">Bonomi Acciai<\/a>, Italian representative of the <a href=\"https:\/\/swisssteel-group.com\/it\">Swiss Steel Group<\/a>, supports engineers and heat treaters in selecting the most suitable material and treatment for each application.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row full_width=&#8221;stretch_row_content&#8221; css=&#8221;.vc_custom_1750858056292{background-color: #ebebeb !important;}&#8221; visibility=&#8221;hidden-phone&#8221;][vc_column]<div class=\"vcex-spacing wpex-w-100 wpex-clear\" style=\"height:35px;\"><\/div>[vc_custom_heading text=&#8221;Would you like to learn more?&#8221; font_container=&#8221;tag:h2|font_size:46px|text_align:center|color:%23172028&#8243; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;]<div class=\"vcex-spacing wpex-w-100 wpex-clear\" 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This process chemically alters the steel surface by diffusing atomic nitrogen into the iron matrix, leading to the formation of nitrides.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_single_image image=&#8221;47679&#8243; add_caption=&#8221;yes&#8221; alignment=&#8221;left&#8221; onclick=&#8221;img_link_large&#8221; 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