中国激光, 2012, 39 (1): 0103008, 网络出版: 2012-01-06   

光纤激光入射角对高强钢对接焊焊接性能的影响

Effects of Incident Angle on Welding Performance of Fiber Laser Butt Welding of High-Strength Automobile Steel
作者单位
1 湖南大学汽车车身先进设计制造国家重点实验室, 湖南 长沙 410082
2 湖南大学激光研究所, 湖南 长沙 410082
摘要
研究了光纤激光入射角变化对车用高强钢(B340/590DP)对接焊焊接性能的影响\.采用前期试验得出的激光垂直入射状态下的最优焊接参数,在该最优参数条件下,利用4 kW光纤激光器进行了1.6 mm厚的双相B340/590DP不同入射角条件下的对接焊试验。分析入射角变化对焊接件外观形貌、焊缝截面、力学性能和微观组织的影响。试验结果表明:激光入射角小于40°时焊缝外观形貌良好,组织细密均匀,能承受较大的拉剪载荷且拉剪试验均断裂在母材区;入射角大于40°时,焊缝背面形成单边焊。
Abstract
The effects of incident angle on welding performance of fiber laser butt welding of high-strength automobile steel are researched. The ideal parameters obtained by the previous test is used. The 4 kW fiber laser is used to weld the dual-phase high-strength steel B340/590DP with the thickness of 1.6 mm at different incident angles with a butt joint. Then the effects of incident angle on the weld topography, cross section topography, tension and shearing property and micro-structure are analyzed. The results show that good weld topography, fine micro-structure and greater tension and shearing property can be obtained when the laser beam incident angle is less than 40°. When the incident angle is more than 40°, the single-sided weld is obtained on the back of the bead.

陈根余, 康斌, 张屹, 李时春, 谭力鹏. 光纤激光入射角对高强钢对接焊焊接性能的影响[J]. 中国激光, 2012, 39(1): 0103008. Chen Genyu, Kang Bin, Zhang Yi, Li Shichun, Tan Lipeng. Effects of Incident Angle on Welding Performance of Fiber Laser Butt Welding of High-Strength Automobile Steel[J]. Chinese Journal of Lasers, 2012, 39(1): 0103008.

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