Microstructure, hardness, and thermal fatigue behavior of H21 steel processed by laser surface remelting

被引：35

作者：

Zhang, Zhihui ^{[1
,2
]}

Lin, Pengyu ^{[1
,2
]}

Zhou, Hong ^{[3
]}

Ren, Luquan ^{[1
,2
]}

机构：

[1] Jilin Univ, Key Lab Engn Bion, Minist Educ, Changchun 130025, Peoples R China

[2] Jilin Univ, Coll Biol & Agr Engn, Changchun 130025, Peoples R China

[3] Jilin Univ, Sch Mat Sci & Engn, Key Lab Automobile Mat, China Minist Educ, Changchun 130025, Jilin Province, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2013年 / 276卷

关键词：

Steel; SEM; Laser; Microstructure; Microhardness; MEDIUM-CARBON STEEL; GLASS PULSED-LASER; NONSMOOTH SURFACE; 3CR2W8V STEEL; TOOL STEELS; WEAR-RESISTANCE; DIE STEEL; PARAMETERS; MORPHOLOGY; OXIDATION;

D O I：

10.1016/j.apsusc.2013.03.009

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：

We investigate the effects of laser surface remelting on the resistance to thermal fatigue of a hot working die steel H21 in this work. Laser treatment was engineered to process samples with several treated morphologies. A dominantly martensitic microstructure, nano-sized carbide and high dislocation density in the treated area, were resulted. The average microhardness of the treated area is similar to 780 HV. The thermal fatigue resistance of laser-treated samples is notably higher than their as-received counterpart. As the thermal fatigue cycle increases, the microhardness of treated area is reduced and then flatted. Crack initiation and propagation both are hampered by it. (C) 2013 Elsevier B. V. All rights reserved.

引用

页码：62 / 67

页数：6

共 25 条

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