Effect of laser surface melting treatment on
properties of electric copper busbar joints
properties of electric copper busbar joints
(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)
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