中国激光, 2018, 45 (6): 0602001, 网络出版: 2018-07-05   

不锈钢薄板激光搭接焊接头的力学性能 下载: 940次

Mechanical Properties of Laser Overlap Welded Joints of Stainless Steel Sheets
作者单位
1 中国科学院金属研究所材料特种制备与加工研究部, 辽宁 沈阳 110016
2 中国科学技术大学材料科学与工程学院, 辽宁 沈阳 110016
摘要
通过激光搭接焊试验,研究了不同接头试样的拉伸剪切性能和疲劳性能,结合焊缝横截面及断口形貌,对试验结果进行了分析。结果表明,对于宽度为80 mm的非熔透型接头,残余应力导致接头拉剪强度减小4.1%,疲劳极限值减小26.4%;0.2 mm搭接间隙使得接头的拉剪强度减小8.8%,疲劳极限值减小6.25%;20°激光斜入射使得接头的拉剪强度增大3.8%, 疲劳极限值增大18.7%。对于相同板厚组合,母材的冷轧状态对接头的力学性能会有一定的影响。
Abstract
By the laser overlap welding experiments, the tensile-shear and fatigue properties of different joint specimens are investigated and the experimental results are analyzed by combining the weld cross-sections and fracture morphologies. The results show that, as for the non-penetrating joint with a width of 80 mm, the residual stress makes the tensile-shear strength decrease by 4.1% and the fatigue limit value decrease by 26.4%. The 0.2 mm overlap gap makes the tensile-shear strength of the joint decrease by 8.8% and the fatigue limit value decrease by 6.25%. The incidence angle of 20° makes the tensile-shear strength of the joint increase by 3.8% and the fatigue limit value increase by 18.7%. As for the same thickness combination, the cold rolling state of base metals has a certain impact on the mechanical properties of joints.

梁行, 阚盈, 姜云禄, 陈怀宁. 不锈钢薄板激光搭接焊接头的力学性能[J]. 中国激光, 2018, 45(6): 0602001. Hang Liang, Ying Kan, Yunlu Jiang, Huaining Chen. Mechanical Properties of Laser Overlap Welded Joints of Stainless Steel Sheets[J]. Chinese Journal of Lasers, 2018, 45(6): 0602001.

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