Ti/Al双金属三通管件冷成形及热处理工艺

Cold de formation and heat treatment process of Ti/Al bimetallic tee pipe fitting

采用多道次液压胀形工艺制备了Ti/Al双金属三通管件。研究了内压力对Ti/Al双金属三通管件胀形性能的影响,建立了双金属三通管件液压胀形的内压力公式,对双金属管液压胀形有很好的指导作用。研究了Ti/Al双金属管爆炸焊接后和三通管件胀形过程中的热处理工艺,并制定相应的热处理工艺。检测了Ti/Al双金属三通管件的支管高度、壁厚分布以及界面结合情况。经过三次胀形成形,成功制备了内外层壁厚分布均匀,支管高度合格,高质量的Ti/Al双金属T型三通管件。

Multi-hydroforming process was adopted in preparing Ti/Al bimetallic tee pipe fitting.The effect of inner pressure on the forming performance was studied,and a internal pressure formula was created for bimetallic tee pipe fitting hydroforming.The experimental tests prove that the formula have a good guide action on practise hydroforming of bimetallic tee pipe fitting.Furthermore,the heat treatment process of explosive welded Ti/Al bimetallic pipe and tee pipe fitting were investigated,and the corresponding heat treatment process was put forward.Finally,the height of branch pipe,thickness distribution,and interfacial bonding of Ti/Al bimetallic tee pipe fitting were inspected.The results show that a highly qualified Ti/Al bimetallic tee pipe fitting with uniform thickness profile in both inside and outside layer and a qualified branch were obtained through three-step hydroforming process.