中国激光, 2014, 41 (8): 0803002, 网络出版: 2014-08-15
GH99高温合金环形和C形激光焊接对比研究 下载: 534次
Comparison of Ring-Form and C-Form Laser Welding for GH99 Superalloy
摘要
发动机火焰筒主要材料为GH99高温合金,其传统焊接方法为电阻点焊。为提高焊接效率,减少机加工序以及焊接缺陷,对比研究了两种激光焊接方式(环形和C形焊),从焊缝成形、微观组织、力学性能等方面揭示激光焊接替代电阻焊的可行性。此外,利用有限元方式,对接头局部和整体构件的焊后应力分布及变形情况进行分析。结果表明,两种焊接方式均能获得良好的焊缝成形,接头性能较原有的电阻焊接头分别高出15.4%和22.1%。有限元计算结果显示C形焊后局部和整体的应力及变形较小。
Abstract
The material used in flame tube in an engine is mainly GH99 superalloy. The traditional welding method is resistance spot welding (RSW). In order to improve welding efficiency, reduce machining procedure and weld defect, comparative study of ring-form and C-form laser welding is carried out. The feasibility of laser welding replacing RSW is revealed from weld appearance, microstructure and mechanical properties. In addition, the residual stress and deformation of local and whole component after welding is analyzed by using finite element method (FEM). The results indicate that good appearances are obtained both using ring-form and C-form welding methods, and their tensile-shear strengths are 15.4% and 22.1% higher than that of RSW, respectively. FEM calculation results show that C-form welding can lead to smaller residual stress and deformation compared to ring-form.
刘春艳, 马瑞, 檀财旺, 郭伟, 李俐群. GH99高温合金环形和C形激光焊接对比研究[J]. 中国激光, 2014, 41(8): 0803002. Liu Chunyan, Ma Rui, Tan Caiwang, Guo Wei, Li Liqun. Comparison of Ring-Form and C-Form Laser Welding for GH99 Superalloy[J]. Chinese Journal of Lasers, 2014, 41(8): 0803002.