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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 9    No. 3    September 1999

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Cu+ Al2O3 composite coating on AISI1045 steel surface by laser cladding
Wang Maoqiu(王毛球), Xie Changsheng(谢长生), Zeng Dawen(曾大文)

School of Materials Science and Engineering,Huazhong University of Science and Technology, Wuhan 430074, P. R. China

Abstract:Perfect composite coatings have been successfully produced with preplaced mixture of Cu+Al2O3(2%~20%) on AISI 1045 steel substrate by using a 2kW COlaser. A suitable amount of Al2O3 in Cu as additive can improve the processing conditions of laser cladding. Fe-rich particles were observed in the clad layer during microstructural observation with SEM and chemical composition analysis by EDAX. The experimental results showed that microhardnesses of the coatings were over 150HV0.05 and the electric resistivities were about 4.0×10-8~4.5×10-8 Ω·m.

 

Key words: laser; cladding; conductive coating; microhardness tests; resistance

ISSN 1672-7029
CN 43-1423/U

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