Improvement of resistance spot weldability of Al-Fe-alloy-coated HPF steel sheets
SCIE
- Title
- Improvement of resistance spot weldability of Al-Fe-alloy-coated HPF steel sheets
- Authors
- Yun Sang-Man; Gwon Hojun; Oh Jin-Keun; Kim Sung-Joon
- Date Issued
- 2022-08
- Publisher
- TAYLOR & FRANCIS LTD
- Abstract
- The resistance spot weldability of Al-Fe-alloy-coated (AlFe-c) HPF steels manufactured by heat-treating Al-Si coated (AlSi-c) steel at 650 degrees C for 10 h was investigated. Since AlFe-c steel had thick oxides in surface layer, the transition resistance was higher and weldability was poorer than the conventional AlSi-c steels. During spot welding of AlFe-c steels, expulsion occurred at low current, so the weld could not grow sufficiently. For this reason, AlFe-c steels had no weldable current range. To improve the weldability, pre-pulse current pattern was applied. By removing the oxides in the coating layer during the pre-pulse step, the resistance of the weld part was reduced, and the expulsion was delayed, so the weldable current range of AlFe-c steel was improved.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/112824
- DOI
- 10.1080/13621718.2022.2061693
- ISSN
- 1362-1718
- Article Type
- Article
- Citation
- SCIENCE AND TECHNOLOGY OF WELDING AND JOINING, vol. 27, no. 6, page. 429 - 436, 2022-08
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- There are no files associated with this item.
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