Characteristics of dilution and microstructure in laser cladding Ni-Cr-B-Si coating assisted by electromagnetic compound field

被引：41
|
作者：
Zhai, Lulu [1 ,2 ]
Ban, Chunyan [1 ]
Zhang, Junwei [2 ]
Yao, Xiaoyan [2 ]
机构：
[1] Northeastern Univ, Minist Educ, Key Lab Electromagnet Proc Mat, Shenyang 110819, Liaoning, Peoples R China
[2] Univ Sci & Technol Liaoning, Laser Adv Mfg Technol Ctr, Anshan 114051, Peoples R China
来源：
MATERIALS LETTERS | 2019年 / 243卷
基金：
中国国家自然科学基金;
关键词：
Laser cladding; Electromagnetic field; Dilution; Microstructure; Solidification; MAGNETIC-FIELD; GRAIN-BOUNDARIES;
D O I：
10.1016/j.matlet.2019.01.133
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ni-Cr-B-Si coatings were prepared on the surface of pure iron using an electromagnetic field assisted laser cladding technique. The effect of electromagnetic field on the cross-sectional morphology, the microstructure and the element distribution was investigated. The results showed that the dilution rate of coatings reduced and the grain size of Cr borides was refined under the electromagnetic field. The volume fraction of Cr borides in the coatings increased and the distribution morphology of phases is related to grain boundary wettability. The length of columnar dendrite crystals at the bottom of the coatings decreased with the increase of the electromagnetic force. (C) 2019 Elsevier B.V. All rights reserved.
引用
收藏
页码：195 / 198
页数：4
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