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Martensitic high‐nitrogen steels
Author(s) -
Berns Hans
Publication year - 1992
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.199200531
Subject(s) - materials science , metallurgy , creep , martensitic stainless steel , toughness , corrosion , nitride , martensite , case hardening , hardening (computing) , layer (electronics) , composite material , hardness , microstructure
Interstitial nitrogen considerably improves the corrosion resistance of low‐tempered martensitic stainless steels. It may be introduced into the bulk by pressure melting or powder metallurgy and into a surface layer by case hardening. The new high‐nitrogen steels (HNS) are suitable for stainless tools and bearings. High‐tempered HNS are outstanding due to a fine dispersion of stable nitrides, which improve the hot and short time creep strength as well as the toughness. This may be used in hot‐work tooling. Long time testing will have to prove whether HNS offer advantages in fossile power plants.