Weld Characteristics and Properties of Laser Wire Filling Welding for Thin-Coated Hot-Formed Steel
Journal Title: Automobile Technology & Material - Year 2024, Vol 39, Issue 1
Abstract
To reduce the adverse effect of aluminum silicon coating layer on the surface of steel plate on laser joint, laser wire filler welding joint with aluminum mass fraction less than 1% in weld was obtained by using thin-coated hot-formed steel material and laser wire filler welding technology. The macro and microstructure of the welded joint were analyzed, it was found that the welded joint was replaced by the whole martensite structure after hot forming,which avoided the softening phenomenon. The mechanical property analysis shows that the tensile strength of the sample increases from about 570 MPa to about 1 500 MPa after hot forming, and the weak link of the joint is located in the base material. High speed tensile has no adverse effect on the tensile strength of the joint, but the elongation at break is affected greatly.
Authors and Affiliations
Jiang Zhigong, Yang Baofeng, Li Tian, Wang Rui, Xu Hong
Keywords
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- EP ID EP731927
- DOI 10.19710/J.cnki.1003-8817.20230026
- Views 78
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