摘要
利用接触熔化理论建立了搅拌摩擦焊的物理模型,并进行了分析计算,探讨了搅拌摩擦焊焊缝的形成机制。指出搅拌摩擦焊过程中,能量沉积引起搅拌头前方摩擦界面处被焊材料的微结构发生改变,形成粘性类液层。研究结果表明,形成稳定厚度的类液层是实现焊接的必要条件。类液态金属在搅拌头的旋转作用下向后高速喷射,最终在搅拌头后方沉积形成弧形层状焊缝组织。
The theory of contact melting was introduced to the study of friction stir welding （FSW） to set up the physical model for quasi-liquid layer and the related calculations were carried out, the formation mechanism of weld was discussed as well. The research indicates that during the process, the microstructure of welding materials at the friction interfaces change due to energy concentration, and viscous quasi-liquid layer forms. The results show that it is necessary for welding to form certain thickness quasi-liquid layers. The micro quasi-liquid metals are sprayed backwards to solidify to form final weld.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2005年第18期1688-1691,共4页
China Mechanical Engineering
关键词
搅拌摩擦焊
接触熔化
类液态薄层
物理模型
friction stir welding
contact melting
quasi-liquid layer
physical model
