固溶与固溶时效热处理对Ti-6Al-4V合金微观组织及力学性能的影响
Effects of Solution and Solution Aging Heat Treatment on Microstructure and Mechanical Properties of Ti-6Al-4V Alloy
王锴 1张晓斌 1刘恕骞 2刘畅 3张先泽 3王梓超3
作者信息
- 1. 航天精工股份有限公司,天津 300300
- 2. 航空工业集团公司成都飞机设计研究所,四川 成都 610000
- 3. 天津工业大学 机械工程学院 天津市现代化机电装备技术重点实验室,天津 300387
- 折叠
摘要
通过对Ti-6A1-4V钛合金螺栓紧固件的热处理实验,比较分析了固溶及固溶时效热处理对Ti-6A1-4V紧固件的微观组织分布的影响,并通过显微硬度计得到了螺栓紧固件各个位置的显微硬度分布.实验结果表明:Ti-6A1-4V螺栓经过固溶处理后,初生α组织的数量与尺寸减少而针状α组织的数量增多,并且初生α组织出现了即将溶解的状态.经过固溶时效热处理后,等轴状的初生α相组织变成了大晶粒β相的片层组织,组织分布较为均匀.固溶时效件试样的硬度分布更为均匀,固溶时效可以有效地提高螺栓的硬度,从而达到材料的使用要求.
Abstract
Through the heat treatment experiment of Ti-6A1-4V titanium alloy bolt fasteners,the effects of solution and solution aging heat treatments on the microstructure distribution of Ti-6A1-4V fasteners were compared and analyzed,and the microhardness distribution of the bolt fastener was obtained by the microhardness meter.The results show that the number and size of primary α structure decreases after the Ti-6A1-4V bolt is solid-solution treated,while the number of needle-like α structure increases,and the primary α structure is dissolved.After the bolts are treated with solution and aging,the equiaxed primary α-phase structure becomes a lamellar structure of large-grain β-phase,and the distribution of the structure is relatively uniform.The hardness distribution of the sample of solution-aged parts is more uniform,and the solution aging can effectively increase the hardness of the bolt to meet the requirements of the material.
关键词
Ti-6A1-4V合金/固溶/固溶时效/螺栓Key words
Ti-6A1-4V alloy/solution/solution aging/bolt引用本文复制引用
基金项目
天津市教委自然科学基金一般项目(2017KJ081)
出版年
2024
NETL
NSTL
万方数据