超薄不锈钢板激光焊接局部变形预测研究

Analytic Prediction on Welding Deformation for Ultra-thin Stainless Steel Laser Welding

目前,对焊接变形的预测大都基于有限元仿真,不仅需要高性能的计算机,计算时间也非常长。文中基于固有应变法,分析了焊接变形产生机理,提出了角变形解析预测模型。采用光纤激光焊接器,在不同焊接功率条件下,对厚度分别为0.2、0.5 mm的316L超薄不锈钢板进行搭接焊接,通过试验结果对模型进行修正并验正。研究表明,该解析预测模型可有效预测316L超薄不锈钢板焊接变形。

Most of the methods used for predicting welding distortion are Fem Analysis-based, which can not only posegreat challenge to computer performance, but also cost time. Based on Inherent stain method and welding mechanism, theanalytic models were built to predict the angular deformation. The experiment was conducted to modify and validate themodels by welding 316L stainless steels with 0.2 mm and 0.5 mm thickness using fiber Laser. The results show that theanalytic model can highly prove the welding deformation of 316L stainless steels.