TC4钛合金的显微组织及其抗冲击韧性  

Microstructure and Impact Toughness Resistance of TC4 Titanium Alloy

作　　者：刘建强[1] 

机构地区：[1]西安航空学院航空工程系,陕西西安710077

出　　处：《热加工工艺》2013年第12期63-66,共4页Hot Working Technology

摘　　要：对TC4钛合金采用不同的热处理工艺,获得了马氏体组织、粗大网篮组织、针状组织、魏氏组织、蠕虫状组织和等轴状+块状双态组织的组织状态,采用夏比冲击试验,对其抗冲击韧性进行分析。结果表明:不同组织状态的TC4钛合金,其抗冲击韧性存在较大差异,原始态TC4钛合金为粗大的魏氏组织,抗冲击韧性很差,Akv2可达20 J;热处理后,等轴状+块状双态组织的冲击功最高,Akv2可达60 J,抗冲击韧性较好;马氏体组织、针状组织、粗大篮网状组织和魏氏组织的冲击功较低,Akv2可达40J,抗冲击韧性较差;蠕虫状组织冲击功最低,Akv2约为30 J,抗冲击韧性最差。TC4 titanium alloy was treated by different technics of heat treatment. The microstructure stater of martensite, basketweave, acicular, widmanstatten and vermicular were obtained. The toughness of resistance impact was analyzed by Charpy impact test. The results show that the toughness of resistance impact of TC4 alloy is different. The microstructure of original TC4 alloy is widmanstatten, which the resistance impact toughness is bad, that Akv2 is about 20 J. After heat treatment, the toughness impact of duplex microstructure of equal axis shape and block is better, that Akv2 is about 60 J. The resistance impact toughness is martensite, needle, basketry and widmanstatten, that Akv2 is about 40 J, the resistance impact toughness of the microstructure of vermicular is worst, that Akv2 is about 30 J.

关 键 词：TC4钛合金 热处理 显微组织 抗冲击韧性 

分 类 号：TG166.6[金属学及工艺—热处理]