Effects of Nb on microstructure and wear resistance of Fe-Cr-C-B surfacing alloy

被引：5
|
作者：
Gou, Jian [1 ]
Liu, Zheng-jun [1 ]
Jia, Hua [1 ]
机构：
[1] Shenyang Univ Technol, Dept Mat Sci & Engn, Shenyang 110870, Liaoning, Peoples R China
来源：
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL | 2018年 / 25卷 / 02期
关键词：
Flux-cored wire; Surfacing layer; Microhardness; Microstructure; Wear resistance; EXPERIMENTAL PARAMETERS; MECHANICAL-PROPERTIES; BEHAVIOR; STEEL; IRON;
D O I：
10.1007/s42243-018-0033-3
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The influence of Nb on the microstructure and wear resistance of the surfacing layer was investigated by using the Fe-based flux-cored wire in the Fe-Cr-C-B system. The microstructure, microhardness and wear resistance properties of the samples were investigated by X-ray diffraction, scanning electron microscopy, microhardness testing and abrasive wear testing, respectively. The results indicate that microstructures of the alloy are composed of martensite, retained austenite, M-23(C,B)(6) and NbC. Boride M-23(C,B)(6) is distributed along the grain boundaries, while NbC in shape-regular quadrilateral is distributed in martensite. The microhardness is distributed from the substrate to the surfacing layer gradiently. NbC significantly improved the wear resistance of surfacing layer.
引用
收藏
页码：243 / 251
页数：9
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