摘要
用高Nb的Ti-Al-Nb基合金作填充金属钨极氩弧焊TD3合金,探讨了焊后时效处理和焊后固溶+时效处理状态下母材及其接头显微结构和力学性能特点。结果表明:接头进行焊后固溶+时效处理相对较合理,热影响区、焊缝区分别为其室温、高温力学性能的薄弱区域;与焊后时效处理相比,焊后固溶+时效处理状态下母材力学性能较低,这主要归因于热处理过程中片状相粗化。
TD3 alloy was welded by Tungsten Inert Gas （TIG） welding with a Ti-Al-Nb based alloy filler. The microstructure and mechanical properties of the base metal and the joint under postweld aging treatment condition and postweld solution plus aging treatment condition were investigated. The results showed that postweld solution plus aging treatment was relatively suitable for the joint. Heat affect zone and weld had the lowest tensile strength at room temperature and at 650℃, respectively. Due to the coarsening of the plated phase, the mechanical properties of the base metal with postweld solution plus aging treatment were lower than those with postweld aging treatment.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2008年第1期68-72,共5页
Journal of Materials Engineering
关键词
TI3AL基合金
钨极氩弧焊
焊后热处理
显微结构
力学性能
Ti3Al based alloy
Tungsten Inert Gas （TIG） welding
postweld heat treatment
microstructure
mechanical property
作者简介
刘卫红（1969-），女，副教授，在职博士后，主要从事材料焊（连）接技术研究，联系地址：北京81信箱20分箱（100095）。E—mail：lwh2028@126．com.
