热工艺对ZT4(Ti6-Al-4V)钛合金铸件残余应力的影响  

Effect of Heat Processing on Titanium Alloy (Ti-6Al-4V Ti) Castings Residual Stress

作　　者：冯芝华[1] 王红红[1] 谢成木[1] 闫渊林[1] 

机构地区：[1]北京航空材料研究院精密铸造工程事业部,北京100095

出　　处：《航空材料学报》2005年第3期25-27,共3页Journal of Aeronautical Materials

摘　　要：对两相钛合金ZT4(Ti-6Al-4V)铸件在不同的后处理工艺条件下表面的残余应力分布进行了研究。试验发现:热等静压处理后铸件表面的残余应力处于较低的应力水平状态,补焊后铸件表面的热应力呈现分散的大数值拉-压应力状态,退火可有效降低铸件表面的热应力,退火后残余应力水平与退火出炉温度有关。Surface residual stress distribution of duplex phases titanium alloy (ZT4) castings in the case of different successive processing are investigated. The experiment results indicate that surface residual stress of castings after hot isostatic pressing is in lower stress level, surface residual stress of welded castings appears scatter and larger numeral value tensile-compressive stress, Annealing treatment can effectively relieve surface residual stress of castings to certain stress level. The final surface residual stress of annealed castings is related to the off-furnace temperature.

关 键 词：钛合金铸件 热工艺 残余应力分布 铸件表面 热等静压处理 两相钛合金 工艺条件 水平状态 应力状态 出炉温度 应力水平 热应力 后处理 退火 

分 类 号：V261.31[航空宇航科学与技术—航空宇航制造工程] TG174.442[金属学及工艺—金属表面处理]