β钛合金环形管热推扩质量分析与控制  

Quality Analysis and Control of Ring Pipe Hot Push-Expanding of β Tianium

作　　者：赵恒章[1,2] 肖林[1] 赵彬[2] 毛小南[2] 孙军[1] 奚正平[2] 

机构地区：[1]西安交通大学金属材料强度国家重点实验室,陕西西安710049 [2]西北有色金属研究院,陕西西安710016

出　　处：《稀有金属材料与工程》2015年第4期995-999,共5页Rare Metal Materials and Engineering

摘　　要：为了研究β钛合金环形管热推的各种质量问题,进行了β钛合金环形管的热推制实验,并采用网格法和有限元法对成形过程进行了分析,研究了实验中诸多质量问题(如起皱、开裂、壁厚不均等)产生的原因,并提出了相应的控制措施。结果表明,羊角芯模、扩径比、温度场、速度等都是影响环形管质量的重要因素,各影响因素相互作用,需协调控制。协调控制原则:羊角芯模、扩径比为设定因素,温度场为关键因素,推制速度为协调因素。To study the forming quality during ring pipe hot push-expanding, the hot push-expanding experiments of β titanium alloy were carried out, and the process of hot push-expanding was analyzed by a mesh method and a finite element method. Moreover, the causes of quality defects, such as corrugate, cracking, wall unevenness, and ellipticity, were discussed. The results show that ram-horn mandrel, expanding radio, temperature and velocity are important parameters which influence the forming quality of ring pipe. They interact with each other and need a coordinated control. The coordinated control principle is that the ram-horn mandrel and the expanding ratio should be set, the temperature is a key factor, and the velocity is a coordination factor.

关 键 词：Β钛合金 环形管 热推扩 分析与控制 

分 类 号：TG306[金属学及工艺—金属压力加工]