钛合金粉末冶金β相区热加工组织行为
Microstructure behavior of hot working in β phase zone of titanium alloy by powder metallurgy
黄志涛 1杨毅2
作者信息
- 1. 中国航空制造技术研究院,北京 100024
- 2. 陕西飞机工业有限责任公司,陕西 汉中 723200
- 折叠
摘要
针对钛合金粉末冶金锻造技术,开展了粉末TC4钛合金单相区锻造及热处理对组织及性能影响的研究.结果表明:粉末烧结态TC4钛合金的晶粒组织相对细小,存在较多孔洞及大角度晶界;单火次锻造条件下,无论变形速度快慢,TC4钛合金锻造后晶粒均未出现异常长大现象,晶粒尺寸可控性较好.粉末态TC4钛合金经两火次β锻造后,晶粒尺寸明显增长,晶粒尺寸控制不佳.单相区一火次、两火次锻造的TC4钛合金的力学性能均可满足标准要求;TC4钛合金粉末锻件经β相区热处理后,未发现异常长大现象,晶粒尺寸可控性更强.
Abstract
For titanium alloy powder metallurgy forging technology,the influences of single-phase forging and heat treatment on the micro-structure and properties of powder metallurgy TC4 titanium alloy were studied.The results show that the grain structure of powder sintered TC4 titanium alloy is relatively small,with many pores and large angle grain boundaries.Under the condition of single-fire forging,there is no abnormal growth phenomenon in grain of TC4 titanium alloy after forging,and the deformation speed,whether fast or slow,indicating good controllability of grain size.After two-fire β forging of TC4 titanium alloy in powder state,the grain size increases significantly,and the grain size control is not obvious.The mechanical properties of single-fire and two-fire forging in single-phase zone meet the standard requirements.After heat treatment in β phase zone of TC4 titanium alloy powder forgings,no abnormal growth phenomenon is found,and the controllability of grain size is stronger.
关键词
TC4钛合金/粉末冶金/β相区/热加工/晶粒尺寸Key words
TC4 titanium alloy/powder metallurgy/β phase zone/hot working/grain size引用本文复制引用
出版年
2025
NETL
NSTL
万方数据