固溶冷却方式和时效温度对TB8钛合金组织和拉伸性能的影响  

Effects of Solution Cooling Modes and Aging Temperature on Microstructure and Tensile Properties of TB8 Titanium Alloy

作　　者：赵聪 石晓辉[1] 曹聪 张新宇 郭瑞鹏 ZHAO Cong;SHI Xiaohui;CAO Cong;ZHANG Xinyu;GUO Ruipeng(School of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024

出　　处：《热加工工艺》2022年第14期126-130,共5页Hot Working Technology

基　　金：国家自然科学基金青年基金项目(51801132);太原理工大学校基金项目(2017QN02)。

摘　　要：研究了固溶后冷却方式和时效温度对TB8钛合金显微组织和拉伸性能的影响。结果表明,相同的时效温度下,固溶后水冷条件下所析出的次生α相的宽度略小于空冷。随着时效温度由530℃升高到590℃,固溶后空冷和水冷条件下析出的次生α相的宽度分别增加了0.32μm和0.27μm,长度变长并相互交叉成网状。时效温度的升高使合金的强度呈降低趋势,塑性则相反。合金经830℃水冷+530℃空冷处理后,获得最高的屈服强度,达到1087 MPa。The effects of solid solution cooling mode and aging temperature on the microstructure and tensile properties of TB8 titanium alloy were investigated. The results show that the width of the secondary α phase precipitated under water cooling after solution treatment is slightly smaller than that of air cooling at the same aging temperature. As the aging temperature increases from 530 ℃ to 590 ℃, the width of the secondary α phase precipitated by air cooling and water quenching increases by 0.32 μm and 0.27 μm, respectively. The length of the α phase becomes longer and crosses into a network. With the increase of aging temperature, the strength of the alloy decreases, and the plasticity of the alloy shows the opposite trend. The highest yield strength is obtained after the alloy is treated with water-cooled at 830 ℃ and air-cooled at530 ℃, and reaches 1087 MPa.

关 键 词：TB8钛合金 时效 次生α相 固溶冷却方式 

分 类 号：TG166.5[金属学及工艺—热处理]