加工工艺对Ti7Al4Mo合金棒材组织性能和超声声速的影响  

Effect of Processing Technologies on Microstructure,Properties and Ultrasonic Velocity of Ti7Al4Mo Alloy Bar

作　　者：李运 韩飞孝 秦立东 孙小平[2] 郑念庆[2] 刘广发[2] 王凯旋[2] Li Yun;Han Feixiao;Qin Lidong;Sun Xiaoping;Zheng Nianqing;Liu Guangfa;Wang Kaixuan(Guangzhou Bureau of Naval Equipment Department,Guiyang 550016,China;National&Local Joint Engineering Laboratory for Special Titanium Alloy Processing Technologies,Western Superconducting Technologies Co.,Ltd.,Xi’an 710018,China;Capital Aerospace Machinery Co.,Ltd.,Beijing 100076,China)

机构地区：[1]海装广州局,贵州贵阳550016 [2]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,陕西西安710018 [3]首都航天机械有限公司,北京100076

出　　处：《钛工业进展》2022年第6期18-23,共6页Titanium Industry Progress

基　　金：陕西省技术创新引导专项(2019CGHJ-21)。

摘　　要：为优化Ti7Al4Mo合金棒材制备工艺,对比研究了精锻工艺和热处理对棒材组织、力学性能和超声声速的影响。结果表明:相同精锻变形温度下,变形量大的?40 mm棒材超声声速低于变形量小的?60 mm棒材,但强度稍高。随着变形温度的提高,棒材初生α相含量逐渐降低,但超声声速逐渐提高,强度先提高后降低。固溶水冷棒材的超声声速低于固溶空冷棒材,且随着固溶温度和时效温度的升高,超声声速逐渐提高。随着固溶温度的升高和时效温度的降低,棒材的强度提高但塑性下降。当热处理制度选用(940~960)℃/1.5 h/WQ+(550~600)℃/8 h/AC时,Ti7Al4Mo合金棒材的强度和塑性匹配较好,且超声声速较高。In order to optimize the preparation process of Ti7 Al4 Mo alloy bars,the effects of precision forging process and heat treatment on microstructure,properties and ultrasonic velocity of the bars were comparative studied.The results show that under the same precision deformation temperature,the ultrasonic velocity of?40 mm bar which has large deformation is lower than that of?60 mm bar which has small deformation,but the strength is slightly higher.With the increase of deformation temperature,the volume fraction ofαphase decreases gradually,but the ultrasonic velocity increases gradually,and the strength increases first and then decreases.The ultrasonic velocity of the bar water-quenched after solution treatment is lower than that of the bar air-cooled after solution treatment,and with the increase of solution temperature and aging temperature,the ultrasonic velocity increases gradually.With the increase of solution temperature and decrease of aging temperature,the strength of the bar increases but the plasticity decreases.When the heat treatment is(940~960)℃/1.5 h/WQ+(550~600)℃/8 h/AC,the strength and plasticity of Ti7 Al4 Mo bars match well,and the ultrasonic velocity is higher.

关 键 词：Ti7Al4Mo合金 精锻 热处理 超声声速 

分 类 号：TG316[金属学及工艺—金属压力加工] TG146.23[一般工业技术—材料科学与工程]