固溶和时效温度对IMI834钛合金板材组织和性能的影响

doi:10.13251/j.issn.0254-6051.2021.03.019

摘要/Abstract

摘要： 研究了不同固溶时效温度对IMI834合金显微组织和力学性能的影响。结果表明:IMI834合金板材经低温热处理的组织和轧态没有明显差别,室温强度也与轧态基本保持不变;合金在α+β两相区热处理后得到双态组织,随着固溶温度的升高,初生α相含量减少,室温强度略有增加,塑性的变化规律与强度相反,初生α相含量的减少对板材的室温强度没有明显的影响。随着时效温度的提高,板材的室温强度降低,塑性有所降低。板材的600 ℃高温力学性能变化规律与室温相似,但断面收缩率较室温好。本试验得到的较优的热处理制度为1035 ℃×1 h, AC+(700~750) ℃×4 h, AC。

关键词: IMI834钛合金, 显微组织, 力学性能

Abstract: Effects of different solution treatment and aging temperature on microstructure and mechanical properties of IMI834 alloy were studied. The results show that there is no significant difference between the microstructure of IMI834 alloy plate heat treated at low temperature and that of as-rolled, and the room temperature strength is also basically unchanged. The bimodal structure of the alloy is obtained after heat treatment in α+β two-phase region, and with the increase of solid solution treatment temperature, the content of primary α phase decreases, the room temperature strength increases slightly, and the change law of plasticity is opposite to that of the strength. The decrease of primary α phase content has no obvious effect on the room temperature strength of the alloy plate. With the increase of aging temperature, the strength of the alloy plate at room temperature decreases and the plasticity decreases to some extent. The high temperature mechanical properties of the plate at 600 ℃ are similar to those at room temperature, but the reduction of area is better than that at room temperature. The optimum heat treatment process obtained in this experiment is 1035 ℃×1 h (air cooling)+ (700-750) ℃×4 h (air cooling).

Key words: IMI834 titanium alloy, microstructure, mechanical properties

中图分类号:

TG166.5

王瑞琴, 葛鹏, 侯鹏, 廖强, 刘宇. 固溶和时效温度对IMI834钛合金板材组织和性能的影响[J]. 金属热处理, 2021, 46(3): 96-99.

Wang Ruiqin, Ge Peng, Hou Peng, Liao Qiang, Liu Yu. Effects of solution treatment and aging temperature on microstructure andmechanical properties of IMI834 titanium alloy plate[J]. Heat Treatment of Metals, 2021, 46(3): 96-99.

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