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Proceedings Paper

Microstructures of laser cladding Co-based Cr-W alloy layer on stainless steel valve
Author(s): Zhongke Wang; Qiguang Zheng; Qingyue Pan; Shihong Shi; Tao Wang; Jianhui Gu
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Paper Abstract

Investigation has been carried out into the solidification features and formation law of microstructure for laser cladding Co-base Cr-W Alloy Laser on Stainless Steel Valve. It is shown that the microstructure at the cladding layer bottom belongs to typical epitaxial growth on basis of plane, and the dendrite crystal is coarser. The microstructure at the top is the regular pine-tree eutectic crystal, and at the middle is small cell crystal and columnar crystal. The crystalline anisotropy influences the crystal growth form. Grain nucleation has obvious features of heterogeneous nucleation in microstructure of cladding. The results also show that the compositions in microzone of cladding layer are non-uniform, different elements segregate along crystalline axis or interdendritic, and these have resulted in the non-uniform microstructure.

Paper Details

Date Published: 8 September 1999
PDF: 4 pages
Proc. SPIE 3862, 1999 International Conference on Industrial Lasers, (8 September 1999); doi: 10.1117/12.361115
Show Author Affiliations
Zhongke Wang, Huazhong Univ. of Science and Technology (China)
Qiguang Zheng, Huazhong Univ. of Science and Technology (China)
Qingyue Pan, Northwestern Polytechnical Univ. (China)
Shihong Shi, South Central Institute of Technology (China)
Tao Wang, Huazhong Univ. of Science and Technology (China)
Jianhui Gu, Huazhong Univ. of Science and Technology (China)

Published in SPIE Proceedings Vol. 3862:
1999 International Conference on Industrial Lasers
Fuxi Gan; Horst Weber; Zaiguang Li; Qingming Chen, Editor(s)

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