Effect of deep cryogenic treatment on electrode life and microstructure for spot welding hot dip galvanized steel
✍ Scribed by Wu Zhisheng; Shan Ping; Lian Jinrui; Hu Shengsun
- Publisher
- Elsevier Science
- Year
- 2003
- Weight
- 908 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0261-3069
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✦ Synopsis
In this article, deep cryogenic treatment technology is first applied for the treatment of electrodes for spot welding hot dip galvanized steel plates and electrode life experiments. The microstructure and element 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 microscopy and X-ray diffraction. The experimental results show that deep cryogenic treatment of electrodes causes Cr and Zr to disperse and makes the grain smaller than in non-cryogenic treatment electrodes. Therefore the electrical conductivity and the thermal conductivity of deep cryogenic treated electrodes are greatly improved, which results in electrode life for spot welding hot dip galvanized steel which is clearly improved.