中国激光, 2002, 29 (s1): 558, 网络出版: 2013-02-23
激光深熔焊接热模型及温度场计算
Heat Source Model and Thermal Field Calculation of Laser Deep Penetration Welding
激光深熔焊 热循环 热源模型 分层处理 温度检测 laser deep penetration welding thermal cycle heat source model delamination method temperature measuring
摘要
激光焊接热循环对焊接接头的性能影响至关重要。考虑等离子体对工件表面的作用以及小孔内等离子体对激光能量的吸收,建立了点热源和逐渐衰减的线热源相叠加的数学模型, 其中对线热源采用了分层处理技术。利用模型对低碳钢的激光焊接进行了求解,并将计算与实测的结果进行了对比。计算与实测结果显示二者有较好的近似性。
Abstract
Thermal cycle greatly influences the microstructures and mechanical properties of laser welded joint. Taking account of the heating effect of plasma on the workpiece and the absorption of heat in the keyhole, a mathematical model, consisted of a point heat source and a line heat source which weakens with the depth, is put forward, and a delamination method is applied for the analysis. The model is used to calculate the thermal field of laser welding of mild steel. The results are compared with that of experiment. The calculation results coincide well with the experiment results.
张永强, 王成, 彭云, 陈武柱, 张旭东, 田志凌. 激光深熔焊接热模型及温度场计算[J]. 中国激光, 2002, 29(s1): 558. ZHANG Yong-qiang, WANG Cheng, PENG Yun, CHEN Wu-zhu, ZHANG Xu-dong, TIAN Zhi-ling. Heat Source Model and Thermal Field Calculation of Laser Deep Penetration Welding[J]. Chinese Journal of Lasers, 2002, 29(s1): 558.
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