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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 11    No. 4    August 2001

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Effect of laser surface melting treatment on
properties of electric copper busbar joints
LIANG Gong-ying(梁工英)1, SONG Xiao-ping(宋晓平)1, GU Lin-yu(顾林喻)2

1. Department of Materials Physics, Science School, Xi′an Jiaotong University,
Xi′an 710049, P.R.China;
2. Department of Materials Engineering, Xi′an Institute of Technology,
Xi′an 710032, P.R.China

Abstract:Electrical conductance and temperature of electric copper busbar joints were measured under different torque moments. Experimental results show that laser surface melting can increase hardness and refine structure of the copper, and it does not deteriorate electric resistance. Meanwhile, the temperature of laser treated joints under electric current is slightly lower than that of original sample. Salt spray test shows that laser treated sample has better salt spray corrosion resistance than the original sample does. The electric resistance of both laser-treated and original samples are increased with salt spray time. For the same salt spray time, the electric resistance of busbar joint is decreased with increasing torque moment.

 

Key words: laser melting; electrical copper busbar; electric conductance; corrosion

ISSN 1672-7029
CN 43-1423/U

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