Mr. Yu Wang Profile

Yu Wang

at Tianjin Univ

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Proceedings Article | 4 January 2008 Paper

Laser welding of automobile double-linked gears

Yu Wang, Xichen Yang, Jianbo Lei, Chunping Zhao, Hongxin Bi

Proceedings Volume 6825, 68250B (2008) https://doi.org/10.1117/12.765628

KEYWORDS: Laser welding, Crystals, Distortion, Gas lasers, Metals, Carbon monoxide, Solids, Laser processing, Manufacturing, Photography

Read Abstract +

In this paper, 5Kw CO₂ laser and a special CNC table were used to weld automobile double-linked gears with 20CrMnTi material and Y gap. A lot of evaluations on microstructure, defects and mechanical properties for welding seam were examined by OM, SEM and X-ray diffraction. It was shown that deep penetration welding in the double-linked gear could be achieved at optimum parameters of 2.6~2.8KW and 2M/min. Laser welding had a small distortion of 0.0408mm in gear diameter. Microstructure of fine martensite and austenite was observed in the welding seam. Mechanical tests of hardness of HV400 and tordional strength of 1512Nm were measured. The welding seam had a comprehensive intensity and toughness. The defects of blowhole and crack could be reduced or avoided by adjusting parameter and preheating before welding. The allowable standard of laser welding of automobile double-linked gears was recommended.

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