TC4钛合金电子束自由成形/热轧加工组织演变规律研究  

Microstructure Evolution of TC4Titanium Alloy During Electron Beam Free Forming and Hot Rolling

作　　者：赵冰[1] 侯红亮[1] 李志强[1] 廖金华[1] 锁红波[1] 任学平[2] 吕政[2] 

机构地区：[1]北京航空制造工程研究所,北京100024 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《材料导报》2015年第8期1-6,共6页Materials Reports

基　　金：航空创新基金课题(KC371302116)

摘　　要：采用电子束自由成形的方法成形出TC4钛合金板材,然后进行热轧,通过分析不同轧制工艺条件下的微观组织,研究了轧制工艺参数对电子束自由成形板材微观组织的影响规律。研究表明,与电子束自由成形后的板材相比,经轧制或轧制后热处理的板材组织主要是热机械加工组织,原始组织中的孔洞也得到弥合。轧制变形是改善电子束自由成形后钛合金组织的一种有效手段。TC4 titanium alloy sheets were fabricated by electron beam free forming （EBFF） method, and subsequently hot rolled, in order to summarize the influences of hot rolling parameters on the microstructure of electron beam free formed sheets by analyzing microstructures under varying rolling conditions. Results showed that compared with the microstructure after EBFF, the microstructure of the sheets after rolling or rolling-heat treatment were mainly composed of thermo-mechanical microstructure, while the cavities in the EBFF sheets were also closed through rolling process. Thus, the rolling process can be ascertained as a valid method to improve the microstructure of EBFF parts.

关 键 词：电子束自由成形 热轧 微观组织 轧制温度 变形量 道次 

分 类 号：TB31[一般工业技术—材料科学与工程]