塑流摩擦焊技术

Fundamental technology of friction flow welding

在介绍塑流磨擦焊接方法和原理基础上,对塑流摩擦焊接工具进行了选型和优化,并且对该焊接技术针对不同铝合金材料的焊接性和不同零件结构的适应性进行了分析,同时对于这种焊接技术在飞机等薄壁结构零件中的应用进行了探讨.结果表明,塑流磨擦焊技术可以利用材料的局部磨擦产生的塑性流变在一定厚度范围内实现材料的可靠的固相连接,可以在类似于飞机薄壁结构的点焊、对接和搭接中得到应用,还可以应用于搅拌磨擦焊表面缺陷的修补、匙孔填充、以及材料表而改性处理等.

On the base of the introduction of the method and principle of the new concept of friction flow welding, one of the variant of friction stir welding, the fundamental research of this welding process was conducted by regarding to the weldability of the different aluminum alloys and the adaptability of various part structures. The testing results show that friction flow welding can get reliable solid state joint within limited thickness by diffusing of the heat plastic flow of the metal material generated by the purposed designed welding tool without central pin. This welding process can be used in joining the butt and lap joints of the thin gauge panel structures, repairing surface defect, filling keyhole and modifying surface performance.