Effect of deep cryogenic treatment on electrode life and microstructure for spot welding hot dip galvanized steel

In this article, the deep cryogenic treatment technology is first applied in the treatment of electrodes, for spot welding hot dip galvanized steel plate and electrode, life experiment is carried out. The microstructure and elements distribution of the deep cryogenic treatment electrodes, and non-cryogenic treatment of electrodes for spot welding hot dip galvanized steel is observed by, scanning electrical microscope and X-ray diffraction. The experimental results shows that deep cryogenic treatment makes Cr, Zr, in deep cryogenic treatment of electrodes, emanate disperseadly and makes the grain of deep cryogenic treatment of electrodes, smaller than non-cryogenic treatment ones, so that the electrical conductivity and the thermal conductivity of deep cryogenic treatment electrodes are improved very much, which makes electrode life for spot welding hot dip galvanized steel that improves obviously.