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Proceedings Paper

Study of protection from cracks in laser cladding of metal-ceramic composite coating
Author(s): Changchi Zhou; Zhan Zhang; Tao Hong; Xinan Tang
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Paper 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.

Paper Details

Date Published: 30 September 1996
PDF: 6 pages
Proc. SPIE 2888, Laser Processing of Materials and Industrial Applications, (30 September 1996); doi: 10.1117/12.253127
Show Author Affiliations
Changchi Zhou, Tsinghua Univ. (China)
Zhan Zhang, Tsinghua Univ. (China)
Tao Hong, Tsinghua Univ. (China)
Xinan Tang, Tsinghua Univ. (China)


Published in SPIE Proceedings Vol. 2888:
Laser Processing of Materials and Industrial Applications
Shu-Sen Deng; S. C. Wang, Editor(s)

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