TC4钛合金β热处理的显微组织演变
Microstructure Evolution of TC4 Titanium Alloy β Heat Treatment
李昌 1任伟宁 2杨健 2李秀琼 1欧阳文博 2李倩 2程法嵩1
作者信息
- 1. 中国航发贵州黎阳航空动力有限公司,贵州 贵阳 550014
- 2. 西部钛业有限责任公司,陕西 西安 710201
- 折叠
摘要
采用β单相区热处理+α-β相区单重/双重热处理相结合的热处理制度对TC4 钛合金板材试样进行处理,获得α束域相互交错、条状α相长宽比适中的网篮组织.结果表明,β相区高温固溶热处理后,随着固溶冷却速率的增加,显微组织由魏氏组织变为针状马氏体.随后的α-β相区单重/双重热处理结果表明,1020℃/1 h,AC+960℃/1 h,FC+900℃/1 h,AC三重热处理可以获得α片层尺寸相对均匀,α束域相互交错的网篮组织;而 1020℃/1 h,WQ+960℃/1 h,FC+900℃/1 h,AC可以获得较高显微硬度的组织.
Abstract
TC4 titanium alloy plate sample was treated through β single phase zone heat treatment and α-β single/double heat treatment to obtain basket-weave microstructure with the staggered α beam domains and the strip α phase with moderate aspect ratio.The results show that the microstructure transforms from widmanstatten structure to acicular martensite structure with the increase of solution cooling rate after the high temperature solution heat treatment in β phase zone.Subsequent results of α-β single/double heat treatment demonstrate that the basket-weave microstructure with staggered α beam domains and relatively uniform α lamellar can be achieved via 1020℃/1 h,AC,960℃/1 h,FC and 900℃/1 h,AC triple heat treatment.And the high micro-hardness structure can be obtained by 1020℃/1 h,WQ,960℃/1 h,FC and 900℃/1 h,AC heat treatment.
关键词
TC4钛合金/魏氏组织/β转变组织/α片层组织/显微硬度Key words
TC4 titanium alloy/Widmanstatten structure/β transformation structure/α lamellar structure/microhardness引用本文复制引用
基金项目
陕西省关键核心技术产业化"揭榜挂帅"项目(2022)()
陕西省秦创原"科学家+工程师"队伍建设项目(2023KXJ-272)
出版年
2024
NETL
NSTL
万方数据