INFLUENCE OF CR AND AL ON THE PROPERTIES OF NITRIDED CASES OF STEELS

被引:3
|
作者
SUZUKI, N [1 ]
NAITO, K [1 ]
机构
[1] NIPPON STEEL CORP LTD,MURORAN WORKS,MURORAN,HOKKAIDO 050,JAPAN
关键词
SURFACE HARDENING; NITRIDING; STEELS FOR NITRIDING; RESIDUAL STRESS; LATTICE STRAIN;
D O I
10.2355/tetsutohagane1955.81.6_655
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
Influence of Al and Cr on the properties of nitrided cases was studied for JIS-SACM645, SCM440 and SKD61 steels under as-nitrided (793K-216ks) and reheated (773 to 973K-3.6ks) conditions, using hardness measurement and X-ray diffraction analysis. Hardness and residual stress distribusion in the nitrided case did not change under as-nitrided condition and reheated condioion at 873K for 3.6ks after nitriding for any of the three steels. SCM440 and SKD61 steels, containing Cr, showed good correlation between hardness of nitrided case and lattice strain induced by nitrogen atoms, while SACM645 steel, containing Al, showed no correlation. The hardening mechanism of nitrided case therefore differ between Cr containing steel and Al containing steel.
引用
收藏
页码:655 / 660
页数:6
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