Study of residual austenite in the surface layer of (M2) high speed steel hardened by laser

被引：0

作者：

Lui, JL ^{[1
]}

Shi, GQ ^{[1
]}

Ding, PD ^{[1
]}

机构：

[1] Chongqing Univ, Dept Met & Mat Engn, Chongqing 400044, Peoples R China

来源：

LASERS IN ENGINEERING | 1999年 / 9卷 / 02期

关键词：

residual austenite; laser hardening; microstructure;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The amount and distribution of the residual austenite in surface layer of M2 high speed steel hardened by laser were investigated by transmission electron microscope and X-ray diffraction, It was shown that less residual austenite exists in laser treated M2 high speed steel compared with the traditionally quenched M2 high speed steel. The amount of residual austenite was decreased by an increase of the laser energy density, Numerous disperse carbide precipitates and larger amount of crystal defects existed in primary austenite grains. The residual austenite distributed heterogenously in the laser treated zone, The more residual austenite existed in the surface zone than that in the subsurface zone.

引用

页码：77 / 83

页数：7