Microstructures of laser cladding Co-based Cr-W alloy layer on stainless steel valve

Zhongke Wang; Qiguang Zheng; Qingyue Pan; Shihong Shi; Tao Wang; Jianhui Gu

doi:10.1117/12.361115

8 September 1999 Microstructures of laser cladding Co-based Cr-W alloy layer on stainless steel valve

Zhongke Wang, Qiguang Zheng, Qingyue Pan, Shihong Shi, Tao Wang, Jianhui Gu

Proceedings Volume 3862, 1999 International Conference on Industrial Lasers; (1999) https://doi.org/10.1117/12.361115
Event: International Symposium on Industrial Lasers, 1999, Wuhan, China

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.

Citation Download Citation

Zhongke Wang, Qiguang Zheng, Qingyue Pan, Shihong Shi, Tao Wang, and Jianhui Gu "Microstructures of laser cladding Co-based Cr-W alloy layer on stainless steel valve", Proc. SPIE 3862, 1999 International Conference on Industrial Lasers, (8 September 1999); https://doi.org/10.1117/12.361115

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