摘要
针对钛合金薄壁结构的钎焊制造技术,通过研究在钎料作用和不同钎焊温度下基体材料的微观组织、相变点、刚度和屈服强度的变化发现,钎料元素扩散导致TC1材料相变点降低,在875℃发生α＋β→β相转变,而TC4钛合金直至905℃尚未发生α＋β→β相转变。在875℃下,随着保温时间延长,TC4材料的晶粒尺寸有所长大,导致刚度和屈服强度明显下降。当钎焊温度为875℃,保温时间不大于60min时,TC4钛合金板材的刚度和屈服强度不低于原始材料的86%。确定出TC4/TC1钛合金异质钎焊工艺范围为865~875℃、保温30~60min。研究结果为钛合金蜂窝结构的钎焊制造技术提供理论依据和参考。
In view of brazing manufacturing technology of titanium alloy with thin walled structure, the effects of brazing process on microstructure, phase transformation point, rigidity and yield strength of titanium alloy are analyzed. It is found that the diffusion of the filler metal leads to a decrease of the phase transition point of TC1 alloy, which is changed at 875℃. However, it is not changed until 905℃ for TC4 alloy. At 875℃, the grain size of TC4 material is grown, which leads to the decrease of the stiffness and yield strength. When the brazing temperature is 875℃ and the holding time is no more than 60 min, the rigidity and the yield strength of titanium alloy sheet are not less than 86% of the raw material. The TC4/TC1 titanium alloy brazing process is determined as 865-875℃ with bolding time as 30-60 min. The research results provide theoretical basis and reference for the brazing of titanium alloy honeycomb structure.
出处
《航空制造技术》
2016年第11期47-50,共4页
Aeronautical Manufacturing Technology
基金
中航工业创新基金项目(2013E62534R)
关键词
钎焊
钛合金
微观组织
相变
Brazing
Titanium alloy
Microstructure
Phase transformation
作者简介
博士．高工．主要从事金属材料钎焊和扩散焊技术研究和产品研发，相继承担了创新基金、航空基金项目和多项预研课题，参与钛合金蜂窝夹层结构的钎焊工艺开发，以第一发明人申请钎料成分设计方面专利两项，发表SCI和EI检索论文10余篇。
