TB6钛合金铸锭均匀化退火及锻造过程中的组织演变

doi:10.13251/j.issn.0254-6051.2025.11.011

摘要/Abstract

摘要： 利用金相显微镜和电子背散射衍射技术,系统分析了TB6钛合金均匀化退火和锻造过程中组织特征,以及β相的取向规律。结果表明,TB6钛合金铸锭在1200 ℃保温48 h均匀化退火过程中易形成尺寸大于20 mm的β晶粒,这些大尺寸β晶粒在后续反复镦拔锻造中表现出显著的组织和取向的继承性。由于β晶粒在锻造过程中变形协调能力强,均匀化退火形成的大尺寸β晶粒碎化过程缓慢,内部α相的等轴化程度低。另外,均匀化退火形成的大尺寸β晶粒具有较丰富的取向分布、无取向择优现象,但在反复镦拔锻造后,β晶粒主要呈<111>取向。

关键词: TB6钛合金, 均匀化退火, 锻造, β相, 取向

Abstract: Microstructure as well as the β phases orientation characteristics of TB6 titanium alloy during homogenizing and forging were investigated by means of metallographic microscope and electron backscatter diffraction (EBSD). The results show that during homogenizing at 1200 ℃ for 48 h, the TB6 titanium alloy ingots tends to form β phase with a grain size larger than 20 mm, these large-sized β phases exhibit significant inheritance of microstructure and orientation during subsequent repeated upsetting and drawing forging. Due to strong deformation coordination ability of β grains during forging process, the fragmentation process of the large-sized β grains formed after homogenizing is slow, and the degree of equiaxation of the internal α phase is low. Additionally, the large-sized β grains formed during homogenizing displays diverse orientations without a preferred texture, but after repeated upsetting and drawing forging, β grains exhibit a <111> orientation.

Key words: TB6 titanium alloy, homogenizing, forging, β phase, orientation

中图分类号:

TG146.4

颜孟奇, 郭鹏达, 佟健博, 李焕峰, 黄驿胜. TB6钛合金铸锭均匀化退火及锻造过程中的组织演变[J]. 金属热处理, 2025, 50(11): 71-75.

Yan Mengqi, Guo Pengda, Tong Jianbo, Li Huanfeng, Huang Yisheng. Microstructure evolution of TB6 titanium alloy ingots during homogenizing and forging[J]. Heat Treatment of Metals, 2025, 50(11): 71-75.

参考文献

[1] 黄旭, 朱知寿, 王红红. 先进航空钛合金材料与应用[M]. 北京: 国防工业出版社, 2012.
[2] 沙爱学, 王庆如, 李兴无. 航空用高强度结构钛合金的研究及应用[J]. 稀有金属, 2004, 28(1): 239-242.
Sha Aixue, Wang Qingru, Li Xingwu. Research and application of high-strength titanium alloys used in airplane structure[J]. Chinese Journal of Rare Metals, 2004, 28(1): 239-242.
[3] 钱九红. 航空航天用新型钛合金的研究发展及应用[J]. 稀有金属, 2000, 24(3): 218-223.
Qian Jiuhong. Application and development of new titanium alloys for aerospace[J]. Chinese Journal of Rare Metals, 2000, 24(3): 218-223.
[4] 艾剑波, 郭俊贤, 覃海鹰, 等. Ti1023主桨毂中央件的微动疲劳及其防护[J]. 直升机技术, 2011(2): 25-29.
Ai Jianbo, Guo Junxian, Qin Haiying, et al. Fretting fatigue of Ti1023 main rotor hub central part and protection[J]. Helicopter Technique, 2011(2): 25-29.
[5] Li Lintao, Wang Zhihua, Ma Wei. Experimental study on the high temperature impact torsional behavior of Ti-1023 alloy[J]. Materials, 2022, 15(11): 3847.
[6] Wang Qiang, Yang Chen, Wu Jie, et al. Phase transformation behavior of Ti-1023 under static heat treatment and dynamic thermo-mechanical coupling[J]. Materials Characterization, 2022, 192: 112248.
[7] 高平, 赵永庆, 于兰兰, 等. TB6钛合金铸锭中的偏析[J]. 热加工工艺, 2009, 38(17): 13-16.
Gao Ping, Zhao Yongqing, Yu Lanlan, et al. Segregation of TB6 alloy ingots[J]. Hot Working Technology, 2009, 38(17): 13-16.
[8] 何勇, 胡锐, 罗伟, 等. 搅拌磁场对 Ti-1023 合金铸锭宏观组织和 Fe 元素宏观偏析的影响[J]. 稀有金属材料与工程, 2017, 46(10): 3063-3067.
He Yong, Hu Rui, Luo Wei, et al. Effect of stirring magnetic field on the macrostructure and macrosegregation of Fe element of Ti-1023 alloy ingot[J]. Rare Metal Materials and Engineering, 2017, 46(10): 3063-3067.
[9] 杨志军, 寇宏超, 李金山, 等. 真空自耗电弧重熔过程中 Ti-10V-2Fe-3Al 合金的宏观偏析行为[J]. 材料工程与性能杂志, 2011, 20(1): 65-70.
Yang Zhijun, Kou Hongchao, Li Jinshan, et al. Macrosegregation behavior of Ti-10V-2Fe-3Al alloy during vacuum consumable arc remelting process[J]. Journal of Materials Engineering and Performance, 2011, 20(1): 65-70.
[10] 高平, 赵永庆, 于兰兰, 等. 热处理对TB6合金铸锭偏析的影响[J]. 热加工工艺, 2009, 38(24): 135-137.
Gao Ping, Zhao Yongqing, Yu Lanlan, et al. Influence of heat treatment on the segregation of TB6 alloy ingots[J]. Hot Working Technology, 2009, 38(24): 135-137.
[11] 范凯, 吴立成, 李建军, 等. VAR过程中浮力驱动流动引起的钛合金宏观偏析数值模拟[J]. 稀有金属材料与工程, 2020, 49(3): 871-877.
Fan Kai, Wu Licheng, Li Jianjun, et al. Numerical simulation of macrosegregation caused by buoyancy driven flow during VAR process for titanium alloys[J]. Rare Metal Materials and Engineering, 2020, 49(3): 871-877.
[12] 吕逸帆, 孟祥军, 李士凯, 等. TB6合金β斑研究概述[C]//第十三届全国钛及钛合金学术交流会论文集. 2008: 544-548.
[13] 史蒲英, 刘向宏, 李建伟, 等. β斑对TB6钛合金性能及拉伸变形行为的影响[J]. 稀有金属材料与工程, 2023, 52(5): 1925-1931.
Shi Puying, Liu Xianghong, Li Jianwei, et al. Influence of β flecks on the properties and tensile deformation behavior of TB6 titanium alloy[J]. Rare Metal Materials and Engineering, 2023, 52(5): 1925-1931.
[14] Tong Jianbo, Zhang Chaojie, Chen Junshu, et al. Effects of homogenization heat treatment on the Fe micro-segregation in Ti-1023 titanium alloy[J]. Materials, 2023, 16(14): 4911.
[15] 颜孟奇, 陈立全, 杨平, 等. 热变形参数对TC18钛合金β相组织及织构演变规律的影响[J]. 金属学报, 2021, 57(7): 880-890.
Yan Mengqi, Chen Liquan, Yang Ping, et al. Effect of hot deformation parameters on the evolution of microstructure and texture of β phase in TC18 titanium alloy[J]. Acta Metallurgica Sinica, 2021, 57(7): 880-890.