线性摩擦焊接头形成过程及机理

发布时间：2018-04-21 20:57

本文选题：线性摩擦焊 + 界面　；参考：《材料工程》2015年11期

【摘要】：分析了异质钛合金线性摩擦焊接头焊合线近域组织结构,结合飞边形貌及组织特点,探讨了线性摩擦焊接头的形成机理。结果表明,在线性摩擦焊接过程中摩擦界面温度超过钛合金基体材料相变点,焊后摩擦界面两侧均有高温塑性层残留并发生再结晶,焊缝区为完全再结晶组织,TC11侧焊缝区为细小针状组织,TC17侧焊缝区为亚稳态β组织。异质钛合金线性摩擦接头形成机理研究表明,在线性摩擦焊接过程中以及焊后摩擦界面始终存在,界面两侧的高温黏塑性金属没有发生机械混合,界面两侧原子发生了扩散迁移现象,在接头结合界面处形成扩散过渡区。摩擦焊通过扩散与再结晶的共同作用形成焊接接头。
[Abstract]:The near region structure of the welding joint of heterogeneous titanium alloy linear friction welding joint is analyzed. The forming mechanism of the linear friction welding joint is discussed according to the morphology and microstructure of the flange. The results show that the temperature of friction interface is higher than that of titanium alloy matrix during linear friction welding, and there is high temperature plastic layer residue and recrystallization on both sides of friction interface after welding. The weld zone is completely recrystallized and the weld zone of TC11 side is fine needle-like microstructure TC17 side weld zone is metastable 尾 structure. The formation mechanism of heterogeneous titanium alloy linear friction joint shows that the friction interface always exists during and after the welding process, and there is no mechanical mixing between the high temperature viscoplastic metals on both sides of the interface. The diffusion and migration of atoms occurred at both sides of the interface, and a diffusion transition zone was formed at the interface of the joint. Friction welding forms welded joints through the interaction of diffusion and recrystallization.
【作者单位】：北京航空制造工程研究所航空焊接与连接技术航空科技重点实验室;北京科技大学材料科学与工程学院;
【分类号】：TG453.9;TG407

【参考文献】