固溶温度对TA19钛合金显微组织和力学性能的影响  

Effect of Solution Temperature on Microstructure and Mechanical Properties of TA19 Titanium Alloy

作　　者：徐建伟[1] 边丽虹[2] 薛强 曾卫东[1] 

机构地区：[1]西北工业大学凝固技术国家重点实验室,陕西西安710072 [2]沈阳黎明航空发动机(集团)有限责任公司,辽宁沈阳110043 [3]陕西宏远航空锻造有限责任公司,陕西咸阳713801

出　　处：《钛工业进展》2015年第6期27-30,共4页Titanium Industry Progress

基　　金：教育部"新世纪优秀人才支持计划"项目(NCET-07-0696)

摘　　要：研究了固溶温度对TA19钛合金棒材显微组织和力学性能的影响规律。结果表明:随着固溶温度的升高,等轴α相含量下降较快,大致呈先快后慢的双线性下降变化趋势,而等轴α相尺寸变化较小,大致呈线性下降;β相在固溶过程中发生再结晶,且再结晶晶粒随固溶温度升高而长大。TA19钛合金棒材的抗拉强度和屈服强度随固溶温度的升高而降低,延伸率和断面收缩率基本保持在同一水平上,其强度的变化主要受滑移长度的影响,合金元素分配作用所引起的基体弱化对强度也有一定的作用。The effects of solution temperature on microstructure and mechanical properties of TA19 titanium alloy bar were investigated in this paper. The results show that the volume of equiaxied α phase decreases rapidly and appears first quick back slow trend. In contrast to the volume of equiaxied α phase, the size of equiaxied α phase decreases slowly with solution temperature, and exhibits a similar linear relationship. In addition, recrystallization of β phase occurs during solution treatment. The recrystallized grain size increases with the increasing temperature. Ultimate tensile strength and yield strength of TA19 titanium alloy bar decrease with the increasing solution temperature. However, the elongation and reduction of area hold a stable state with the changes in solution temperature. Such changes of strength are mainly influenced by slip length. Furthermore, the weakening of matrix caused by distribution of elements also plays a certain role.

关 键 词：TA19钛合金 固溶温度 显微组织 力学性能 

分 类 号：TG166.5[金属学及工艺—热处理]