Investigation on Microstructure and Dry Sliding Wear Behavior of a Novel Fe-Cr-B-C-Al-Si-Mn Composite Coatings on 2Cr13 Steel by Laser Cladding

被引:0
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作者
Jian Gu
Dongqing Li
Shengchun Liu
Jiajun Si
Songlin Cai
Xuliang Liu
Peng Liu
Kaiming Wang
机构
[1] China Electric Power Research Institute,Hunan Provincial Key Laboratory of Intelligent Manufacturing Technology for High
[2] Changsha University of Science and Technology,performance Mechanical Equipment, College of Automobile and Mechanical Engineering
[3] Tsinghua University,State Key Laboratory of Tribology, Department of Mechanical Engineering
关键词
Fe-based composite coatings; laser cladding; microstructure; TEM; wear resistance;
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学科分类号
摘要
A novel Fe-Cr-B-C-Al-Si-Mn composite coating was designed and synthesized on 2Cr13 steel substrate using laser cladding technique in this study. The microstructure evolution, microhardness and wear resistance of the composite coating were investigated. The results showed that the microstructure of the coating was mainly composed of α-(Fe,Cr,Al) martensite, retained γ-Fe, and the eutectic comprised of CrFeB, M3(C,B)2, M2(B,C) and M23(C,B)6. The average microhardness of the coating (742.1 HV0.5) was 3.95 times compared with the 2Cr13 steel substrate, and the wear resistance was enhanced by 12.5 times compared with the 2Cr13 steel substrate. The wear mechanisms were dominated by abrasive wear and oxidative wear.
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页码:2381 / 2390
页数:9
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