Research of Laser Cladding Ni-based Alloys on Stainless Steel

被引：0
作者：
Fei, Q. X. [1 ,2 ]
Cao, W. B. [1 ]
Bai, F. M. [2 ]
Zhang, Y. [2 ]
Tan, Y. S. [2 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Dept Inorgan Nonmetall Mat, Beijing 100083, Peoples R China
[2] Beijing Aeronaut Mfg Technol Res Inst, Beijing 100024, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2011年 / 40卷
关键词：
laser cladding; Ni-based alloys; microstructure; wear resistance properties; WEAR BEHAVIOR; COMPONENTS; COATINGS;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Laser cladding of NiCrBSi coatings on 1 Crl8Ni9Ti stainless steel substrate were obtained by high, power laser. Microstructure, composition distribution and wear properties of the as-cladded coatings by different laser power were investigated using SEM, EDS and M-2000 wear resistance machine. The results show that the coating can be characterized as two regions, cladding and bonding zones. The cladding zone consists of multiple phases such as gamma-(Ni,Fe) and CrB, which presenting several morphologies: dendritic, eutectic, irregular granulated and needle-like structures. The bonding zone was mixed by NiCrBSi and the melted substrate surface, mainly made up of columnar grains. Dilution rate increased with the increase of laser power. The wear test results show that the wear mechanism of the multi-track clad coatings is abrasive and adhesive wear. The wear rate is in the range of (2.2 similar to 2.6)X 10(-5)mm(3)/m-N and the average friction coefficient is 0.52. The wear resistance decreased when increasing laser power. EDS analysis indicates that the main constitutional compositions of Ni, Fe, Cr and Si homogeneously distribute in the coatings. Fe fraction was apparently improved in the higher laser power cladded coatings.
引用
收藏
页码：288 / 291
页数：4
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