Surface Characterization of a Nitrided Low Alloy Steel

被引：0

作者：

Keddam, M. ^{[1
]}

Kouba, R. ^{[1
]}

Chegroune, R. ^{[1
]}

Bouarour, B. ^{[1
]}

机构：

[1] USTHB, Dept Mat Sci, Fac Genie Mecan & Genie Proc, Bab Ezzouar 16111, Alger, Algeria

来源：

DIFFUSION IN SOLIDS AND LIQUIDS VI, PTS 1 AND 2 | 2011年 / 312-315卷

关键词：

Nitriding; CrN phase; Iron nitrides; GDOS analysis; Compound layer; Nitriding potential;

D O I：

10.4028/www.scientific.net/DDF.312-315.70

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The 32CrMoV13 low alloy steel was gas nitrided at 550 degrees C, for three time durations (6.5, 13 and 20 h) and under a variable nitriding potential (1, 2.2 and 6 atm(-0.5)). The generated nitride layers were characterized by SEM observations, XRD and GDOS analyses as well as microhardness testing. The XRD analysis indicates that the compound layer was composed of epsilon and gamma' iron nitrides and CrN phase. The surface hardness (inside the compound layer) was found to be dependent on the nitriding potential value, its value increases as K-N, rises. It was shown by GDOS analysis that the upper and lower nitrogen concentrations at the (compound layer / diffusion zone) interface are approximatively: 4 and 0.88 wt. % N, respectively.

引用

页码：70 / 75

页数：6