超塑成形及热处理对TC21合金组织演变的影响  

Effect of Superplastic Deformation and Heat Treatment on Microstructure Evolution of TC21 Alloy

作　　者：凌志伟[1] 董洪波[1] 王志录 

机构地区：[1]南昌航空大学航空制造工程学院 [2]中航工业江西景航航空锻铸有限公司

出　　处：《特种铸造及有色合金》2013年第4期381-383,共3页Special Casting & Nonferrous Alloys

基　　金：航空科学基金项目(2010ZE56016);国家自然科学基金资助项目(51164029)

摘　　要：TC21钛合金在不同条件下超塑拉伸变形后,进行双重退火热处理,研究热加工工艺对TC21合金显微组织演变的影响。结果表明,当变形温度在890～960℃时,TC21合金的伸长率随变形温度的增加先增加后减少,最佳超塑性变形温度为910℃;TC21合金在α+β相区超塑变形,然后在α+β相区双重退火处理后得到双态组织;在准β区进行超塑变形、α+β相区双重退火处理后得到网篮组织。After superplastic tensile deformation and double annealing heat treatment at different conditions, the effects of hot working technology on microstructure evolution of TC21 titanium alloy were investigated. The results show that at 890 ℃～960 ℃, the elongation of TC21 alloy is increased firstly and then decreased with the increase of deformation temperature. The optimal superplastic deformation temperature is 910 ℃. After superplastic deformation and double annealing treatment in α+β phase zone,the microstructure of TC21 alloy exhibits duplex structure. After superplastic deformation in quasi-β phase zone and double annealing treatment in α+β phase zone, basketweave structure can be observed in the microstructure of TC21 alloy.

关 键 词：TC21合金 超塑变形 双重退火 组织 

分 类 号：TG146.23[一般工业技术—材料科学与工程]