搅拌摩擦焊温度场  

Temperature fields during friction stir welding

作　　者：史清宇[1] 王细波[1] 康旭[1] 孙延军[1] 

机构地区：[1]清华大学机械工程系,先进成形制造教育部重点实验室,北京100084

出　　处：《清华大学学报（自然科学版）》2010年第7期980-983,988,共5页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(50875146)

摘　　要：搅拌摩擦焊接过程中温度场的分布对焊缝成形质量具有重要的影响。该文结合数值模拟和实验方法,研究搅拌摩擦焊接过程的温度场。基于ALE(arbitrary Lagrangian-Eulerian)方法建立完全热-力耦合的有限元模型,对搅拌摩擦焊接过程开展数值仿真,同时在模型中考虑塑性变形产热。选取两组不同工艺参数(旋转速度分别为600 r/min和800 r/min)对温度场的分布进行计算,并在相同的工艺参数下测量焊接过程中距焊缝不同位置处的峰值温度。数值模拟和实验对比结果表明:该模型能准确地模拟搅拌摩擦焊接过程中的准稳态温度分布情况;搅拌摩擦焊峰值温度低于材料的固相线;焊缝前进侧温度稍高于后退侧。The temperature field during friction stir welding has an important impact on the weld quality.Numerical and experimental methods were used to study the temperature distributions during friction stir welding.A fully-coupled thermal-mechanical finite element model based on the arbitrary Lagrangian-Eulerian（ALE） method was used to numerically simulate the friction stir welding with the inelastic heat generation included in the model.The temperature fields during friction stir welding were simulated with rotational speeds of 600 r/min and 800 r/min.The peak temperatures were also measured at several different locations for the same speeds.The results show that the numerical model can accurately simulate the measured temperature distribution of this process during friction stir welding,with the peak temperature during friction stir welding somewhat lower than the solidus temperature,with the temperatures on the advancing side slightly higher than on the retreating side.

关 键 词：搅拌摩擦焊 有限元模拟 完全力-热耦合模型 温度场 

分 类 号：TG453.9[金属学及工艺—焊接]