Microstructure and Wear Resistance Enhancement of Semi-Steel Rolls by Laser Surface Alloying of NiCr-Cr3C2

被引：2

作者：

Sun, G. ^{[1
]}

Zhang, Y. ^{[1
]}

Liu, C. ^{[2
]}

Li, P. ^{[1
]}

Tao, X. ^{[3
]}

机构：

[1] Jiangsu Univ, Sch Mech Engn, Zhenjiang 212013, Peoples R China

[2] Northeastern Univ, Minist Educ, Key Lab Anisotropy & Texture Mat, Shenyang 110004, Peoples R China

[3] Shenyang Dalu Laser Whole Set Equipment Ltd Co, Shenyang 110136, Peoples R China

来源：

LASERS IN ENGINEERING | 2010年 / 19卷 / 5-6期

基金：

中国国家自然科学基金;

关键词：

laser surface alloying; semi-steel roll; carbide; microstructure; microhardness; wear; SLIDING WEAR; TRIBOLOGICAL BEHAVIOR; SPRAYED CR3C2-NICR; IMPROVEMENT; OXIDATION; IRON; TOOL;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Laser surface alloying was used to form wear resistant layers on semi-steel rolls with NiCr-Cr3C2 powders. Microstructure, element distribution, phases, microhardness distribution and wear behaviour of the layers were investigated. Observed dendrites and eutectics in the layers were found to be composed of austenite, martensite and carbides, austenite, martensite, respectively. The microhardness of the alloyed layers was lower than that of the substrate owing to the large fraction of the retained austenite. Wear results at ambient and 500 degrees C indicate that the wear mass loss of the substrate was 2.2 and 4.9 times that of specimens with pre-layers of 30 and 18 mm in thickness, respectively. The improvement in wear resistance is believed to be the effect of the high toughness of the retained austenite, austenite-martensitc transformation and the oxide films which can offer better tribological enhancement at high temperatures.

引用

页码：347 / 361

页数：15

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