Study on microstructure of laser-clad NiCrBSi-TiC coating on the surface of titanium alloy

被引：0
|
作者：
Sun, R.L. [1 ]
Guo, L.X. [1 ]
Dong, S.L. [1 ]
Yang, D.Z. [1 ]
机构：
[1] Sch. of Material Sci. and Eng., Harbin Inst. of Technol., Harbin 150001, China
来源：
Zhongguo Jiguang/Chinese Journal of Lasers | 2001年 / 28卷 / 03期
关键词：
Cermets - Cladding (coating) - Lasers - Microhardness - Titanium alloys;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The clad coating of NiCrBSi-TiC metal-ceramic powders on the surface of TC4 alloy was performed by CO2 laser. By means of SEM and XRD, microstructure of the coating was investigated, and microhardness was measured. The experimental results show that the clad coating is continuous, homogeneous, poreless and crackless by optimizing the technical parameters. The phases of coating are composed of TiC, γ-Ni, M23 (CB)6, CrB, Ni3B et al. The edges of TiC particles were dissolved during laser heating, and the tiny dendrites of TiC precipitated during cooling. The average hardness of coating is Hv980.
引用
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页码：275 / 278
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