锻造工艺对BT25钛合金组织和性能影响  

Effect of Forging Process on Microstructure and Properties of BT25 Titanium Alloy

作　　者：朱红[1] 孙捷[2] 凌敏 ZHU Hong;SUN Jie;LING Ming(Guizhou College of Industrial Technology,Guiyang 550008,China;School of Materials and Metallurgy,Guizhou University,Guiyang 550025,China;School of Materials and Metallurgical Engineering,Guizhou Institute of Technology,Guiyang 550003,China)

机构地区：[1]贵州工业职业技术学院,贵州贵阳550008 [2]贵州大学材料与冶金学院,贵州贵阳550025 [3]贵州理工学院材料与冶金工程学院,贵州贵阳550003

出　　处：《热加工工艺》2019年第21期102-104,108,共4页Hot Working Technology

基　　金：贵州省科学技术基金项目(黔科合LH字[2016]7097);贵阳市工业攻关项目([2012101]2-8);贵州省工业攻关项目(GY(2012)3002)

摘　　要：研究了锻造温度、锻后冷却方式和变形量对BT25钛合金的显微组织和室温力学性能的影响。结果表明:随着锻造温度升高,BT25钛合金的显微组织从双态组织逐渐变成魏氏组织。锻后水冷抑制次生α相的析出,最终获得细片状的α相组织。变形量越大,合金的再结晶越充分。在空冷和水冷下,合金的室温力学性能变化趋势相似。随着锻造温度从975℃升高到1055℃,BT25合金的强度先升高后降低,而塑性一直降低。The effects of forging temperature, cooling mode after forging and amount of deformation on the microstructure and room temperature mechanical properties of BT25 titanium alloy were studied. The results show that with the increase of forging temperature, the microstructure of BT25 titanium alloy gradually changes from double state to Widmannstatten microstructure. Water cooling after forging inhibits the precipitation of secondary α phase and finally fine lamellar α phase microstructure is obtained. The larger the amount of deformation is, the more fully recrystallized the alloy is. Under air cooling and water cooling, the trends of mechanical properties of the alloy are similar. With the increase of forging temperature from975 ℃ to 1055 ℃, the strength of BT25 alloy firstly increases and then decreases, but the plasticity decreases.

关 键 词：锻造温度 锻后冷却 变形量 显微组织 力学性能 

分 类 号：TG319[金属学及工艺—金属压力加工]