固溶冷却速度对短时高温钛合金显微组织和力学性能的影响  

Effects of Solution Cooling Rate on Microstructure and Mechanical Properties of Short-time High-temperature Titanium Alloy

作　　者：周伟[1] 辛社伟[1] 洪权[1] 贾伟菊 李倩[1] 张思远[1] 李思兰[1] 毛成亮 ZHOU Wei;XIN She-wei;HONG Quan;JIA Wei-ju;LI Qian;ZHANG Si-yuan;LI Si-lan;MAO Cheng-liang(Northwest Institute for Non-ferrous Metal Research,Xi′an 710016,China)

机构地区：[1]西北有色金属研究院,陕西西安710016

出　　处：《稀有金属与硬质合金》2020年第4期49-52,共4页Rare Metals and Cemented Carbides

基　　金：国家重点研发计划项目(2016YFB0301201)。

摘　　要：研究了固溶冷却方式对一种新型短时高温钛合金热轧板材显微组织及力学性能的影响。结果表明,合金经近β区高温固溶及不同方式冷却后产生不同的相产物,空冷后的相产物为α+β相,油冷和水冷后的相产物均为α′+α″相。随着冷却速度的提高,合金强度提高而塑性降低。钛合金固溶处理后采用油冷方式可获得较好的综合力学性能,室温抗拉强度>1 150 MPa,延伸率>8%。The effect of cooling rate after solution on microstructure and mechanical properties of a new type of short-time high-temperature titanium alloy hot-rolled sheet was studied.The results show that the alloy has different phase products after high-temperature solid solution near the beta zone and cooling in diffe-rent ways.The α and β phases are obtained by air cooling,while α′ and α″ phases are produced by oil cooling and water cooling.With the increase of cooling rate,the strength of the alloy increases,while its plasticity decreases.The titanium alloy can obtain excellent comprehensive mechanical properties by oil cooling after solution treatment,and its room-temperature tensile strength and elongation exceed 1 150 MPa and 8%,respectively.

关 键 词：短时高温钛合金 固溶 冷却 显微组织 物相组成 室温力学性能 拉伸断口 

分 类 号：TG146.23[一般工业技术—材料科学与工程]