Study of protection from cracks in laser cladding of metal-ceramic composite coating

Changchi Zhou; Zhan Zhang; Tao Hong; Xinan Tang

doi:10.1117/12.253127

30 September 1996 Study of protection from cracks in laser cladding of metal-ceramic composite coating

Changchi Zhou, Zhan Zhang, Tao Hong, Xinan Tang

Proceedings Volume 2888, Laser Processing of Materials and Industrial Applications; (1996) https://doi.org/10.1117/12.253127
Event: Photonics China '96, 1996, Beijing, China

Abstract

It is the chief difficulty of laser cladding metal-ceramics layer that cracks are liable to emerge. The processing technology and coating materials are studied to resolve the problem. Firstly, according to the calculating of temperature field distribution and analysis of thermal stress in the cladding procedure, it is considered that the scanning velocity of laser beam and initial temperature are the main technological factors of crack emergence. On the other hand, the gradient distribution of ceramic hard phase is carried out and transition layer is put in between cladding layer and substrate. The results of SEM and microhardness test show, the hardness changed smoothly from surface to substrate, coating layer is dense and free of cracks.

Citation Download Citation

Changchi Zhou, Zhan Zhang, Tao Hong, and Xinan Tang "Study of protection from cracks in laser cladding of metal-ceramic composite coating", Proc. SPIE 2888, Laser Processing of Materials and Industrial Applications, (30 September 1996); https://doi.org/10.1117/12.253127

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