Friction stir processing of a D2 tool steel layer fabricated by laser cladding

被引：14

作者：

Nagaoka, Toru ^{[1
]}

Kimoto, Yoshihisa ^{[1
]}

Watanabe, Hiroyuki ^{[1
]}

Fukusumi, Masao ^{[1
]}

Morisada, Yoshiaki ^{[2
]}

Fujii, Hidetoshi ^{[2
]}

机构：

[1] Osaka Municipal Tech Res Inst, Joto Ku, Osaka 5368553, Japan

[2] Osaka Univ, Joining & Welding Res Inst, Osaka 5670047, Japan

来源：

MATERIALS & DESIGN | 2015年 / 83卷

基金：

日本科学技术振兴机构;

关键词：

Friction stir processing; Laser cladding; Tool steel; Hardness; BEHAVIOR;

D O I：

10.1016/j.matdes.2015.06.040

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Friction stir processing of a D2 tool steel layer fabricated by laser cladding was carried out to modify its as-cast microstructure. The microstructural evolution in the stir zone was observed and micro-Vickers hardness was measured. A maximum hardness of 857 HV was obtained by friction stir processing at 200 rpm. This value is higher than that of the clad layer when it is subjected to austenitizing heat treatment without friction stir processing. This superior property is attributed to the decrease of volume fraction of retained austenite after friction stir processing. The friction stir processing condition with low heat input led to high volume fractions of fine M7C3 carbide particles and martensite. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：224 / 229

页数：6

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