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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 11    No. 6    December 2001

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Wear resistance and hot corrosion behaviour of|
laser cladding Co-based alloy
ZHANG Song(张  松)1,2, ZHANG Chun-hua (张春华)1
MAN Hau-chung(文效忠)3, WU Wei-tao(吴维tao)2, WANG Mao-cai(王茂才)2

1. School of Materials Science and Engineering,
Shenyang Polytechnic University, Shenyang 110023, P.R.China;
2. State Key Laboratory for Corrosion and Protection of Metals,
Chinese Academy of Science, Shenyang 110016, P.R.China;
3. Department of Manufacturing Engineering,
Hong Kong Polytechnic University, Hong Kong, P.R.China

Abstract: 2Cr13 stainless steel was surface cladded with Co-based alloy using a high power carbon dioxide laser. The microstructure, wear resistance and corrosion properties of the clad layer were investigated. It is found that the high temperature corrosion behavior and wearing resistant property of the clad layer are 3 and 2.5 times higher than those of the parent metal. Under the high temperature molten lead sulphate salt corrosion condition, the clad layer fails by spalling which is caused by intergrannular corrosion within the clad layer. The fine dendritic structure and the oxide help to retard the penetration of the sulphur ion that induces the intergrannular corrosion.

 

Key words:  laser cladding; Co-based alloy; wear resistance; hot corrosion

ISSN 1672-7029
CN 43-1423/U

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