Effect of carburization on microstructure and rolling contact fatigue property of 95W-3.4Ni-1.6Fe heavy alloy

被引：15

作者：

Wang, Guang-hong ^{[1
]}

Qu, Sheng-guan ^{[1
]}

He, Rui-liang ^{[1
]}

Hu, Ke ^{[1
]}

Li, Xiao-qiang ^{[1
]}

机构：

[1] South China Univ Technol, Natl Engn Res Ctr Near Net Shape Forming Technol, Guangzhou 510640, Guangdong, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2016年 / 26卷 / 12期

基金：

中国博士后科学基金;

关键词：

tungsten alloy; rolling contact fatigue; carburization; spalling; TEMPERATURE TENSILE PROPERTIES; NI-FE ALLOYS; LIQUID-PHASE; MECHANICAL-PROPERTIES; TUNGSTEN CONTENT; BEHAVIOR; PARTICLES; COMPOSITES; STEEL; SIZE;

D O I：

10.1016/S1003-6326(16)64448-5

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

95W-3.4Ni-1.6Fe heavy alloy was carburized by pack carburization. Microstructure and hardness of the carburized alloy were investigated by SEM, EDS XRD. Effect of carburization on the rolling contact fatigue (RCF) property of the alloy was studied. The results showed that the carburized layer was composed of the outer, porous WC layer and the modified subsurface layer with each W grain surrounded by a WC shell. Carburization not only decreased the RCF performance of the alloy but also aggravated the wear of the counter balls. The untreated alloy was damaged by two modes of spalling and delamination under RCF condition. The subsurface main crack of the untreated alloy initiated where the maximum shear stress existed and preferentially propagated along the W-W interfaces. Spalling was the main failure mode of the carburized alloys, and the crumbling WC particles intensified the abrasion of the carburized surface.

引用

页码：3161 / 3169

页数：9

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