As a solid-state welding technique,friction stir welding (FSW) is different from the traditional fusion welding,and a-chieves the effect by causing great plastic deformation at the joint.In this paper,a numerical model for FSW was established based on the finite element method to obtain the temperature distribution during the welding process.The results showed that the temperature in the welding process is symmetrically distributed about the joint,and is lower with a large gradi-ent in front of the stirring head.The influence of process parameters including stirring head rotation velocity,nor-mal force and shoulder radius on the temperature distribution was quantitatively analyzed.The results showed that all those parameters are positively correlated with the maximum temperature,which is located within the shoulder coverage zone when the shoulder radius is large enough,and within the stirring needle when the shoulder radius is small.
关键词
搅拌摩擦焊/数值模型/温度分布
Key words
Friction stir welding/Numerical model/Temperature distribution
维普
万方数据