固溶时效温度对IMI834钛合金组织和性能的影响  

Influences of Solution and Aging Temperature on Microstructure and Mechanical Properties of the IMI834 Alloy

作　　者：史蒲英[1] 张永强 孙峰[1] 孙小平[1] 张晓园[1] 赖运金[1] 王凯旋[1] Shi Puying Zhang Yongqiang Sun Feng Sun Xiaoping Zhang Xiaoyuan Lai Yunjin Wang Kaixuan(NLEL for Special Titanium Alloy Material Manufacturing, Western Superconducting Technologies Co. , Ltd. AVIC Commercial Aircraft Engine Co. , Ltd.)

机构地区：[1]西部超导材料科技股份有限公司特种钛合金材料制备技术国家地方联合工程实验室 [2]中国航发商用航空发动机有限责任公司

出　　处：《特种铸造及有色合金》2017年第9期936-939,共4页Special Casting & Nonferrous Alloys

基　　金：国家重点研发计划资助项目(2016YFB0701305);陕西省科技统筹创新工程计划(2016KTCQ01-81)

摘　　要：研究了IMI834钛合金棒材经不同固溶和时效热处理后的显微组织和性能,以期获得固溶和时效与合金组织性能的对应关系以及最优热处理工艺。结果表明,抗拉强度和屈服强度随固溶温度的升高先升高后降低,最大强度和塑性值出现在1 005~~1 025℃之间;合金的室温和高温强度及高温断面收缩率随时效温度升高先降低后增加;伸长率及室温断面收缩率先略升高后略降低,合金组织随时效温度变化不明显;拉伸断裂过程中,裂纹在初生α相处萌生;锻态IMI834合金的最佳热处理工艺为(1 005~1 025℃)×2h+水淬+(750~800℃)×2h+空冷。Effects of different solid solution and aging treatment on microstructure and mechanical properties of IMI834 Ti alloy were investigated to understand the relation of solid solution and aging treatment with microstructure and properties of the alloy as well as the optimized heat treatment parameters.The results reveal that with increasing in solid solution temperature,tensile strength and yield strength of the alloy exhibit increased firstly and then decreased in form of parabolic.The maximum strength and elongation of the alloy can be observed in range of 1 005～1 025 ℃.The room and elevated strength as well as elevated contrac-tion of area are increased firstly and then decreased with increasing in aging temperature.Elongation and ambient contraction of area is increased slightly firstly and then decreased slightly.Microstructural evolution of alloy can be ignored with increasing in aging temperature.During tensile crack process,crack is generated at theαphase.The optimized heat treatment process for the asforged IMI834 alloy is presented as follows：solid solution at（1 005～1 025 ℃）×2 h＋ water quenching＋aging at（750～800 ℃）×2h ＋air cooling.

关 键 词：IMI834钛合金 固溶时效温度 组织演变 拉伸性能 

分 类 号：TG146.23[一般工业技术—材料科学与工程] TG166.5[金属学及工艺—金属材料]