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51312-01324-INTERSTITIAL HARDENING WITH NITROGEN FOR IMPROVED CORROSION RESISTANCE OF A286 AND 2205 STAINLESS ST

Picture for INTERSTITIAL HARDENING WITH NITROGEN FOR IMPROVED CORROSION RESISTANCE OF A286 AND 2205 STAINLESS ST
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Product Number: 51312-01324-SG
ISBN: 01324 2012 CP
Author: Nicole Tailleart
Publication Date: 2012
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Case hardening by carburization has long been recognized to produce wear resistant surfaces in steels. Historically when case hardening was applied to Cr containing alloys such as stainless steel corrosion performance was degraded because of chromium carbide formation. More recently it was shown that the interstitial hardening (IH) surface modification treatment of stainless steels (SS) enhanced surface hardness and fatigue resistance without compromising ductility. Carbon penetrates into the alloy at a depth of up to 25µm from all surfaces accessible to the treatment atmosphere. These statements are also true for IH surface modification with nitrogen and the nitriding process. The industrial implementation of IH surface modification process is extremely simple can be used in non-line of sight configurations maintains sample dimensions and is relatively inexpensive. A growing body of work performed at NRL on IH-treated stainless steel alloys shows that IH improved corrosion fatigue galling and wear resistance of the treated materials compared to the untreated alloys. This communication will discuss recent work on the interstitial hardening of stainless steels.
Case hardening by carburization has long been recognized to produce wear resistant surfaces in steels. Historically when case hardening was applied to Cr containing alloys such as stainless steel corrosion performance was degraded because of chromium carbide formation. More recently it was shown that the interstitial hardening (IH) surface modification treatment of stainless steels (SS) enhanced surface hardness and fatigue resistance without compromising ductility. Carbon penetrates into the alloy at a depth of up to 25µm from all surfaces accessible to the treatment atmosphere. These statements are also true for IH surface modification with nitrogen and the nitriding process. The industrial implementation of IH surface modification process is extremely simple can be used in non-line of sight configurations maintains sample dimensions and is relatively inexpensive. A growing body of work performed at NRL on IH-treated stainless steel alloys shows that IH improved corrosion fatigue galling and wear resistance of the treated materials compared to the untreated alloys. This communication will discuss recent work on the interstitial hardening of stainless steels.
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