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采用置氢钛合金粉末热等静压成形与钛合金热氢处理技术相结合的新工艺路线制备合金,研究了置氢量对置氢TC21合金粉末热等静压制件组织性能的影响规律。结果表明:随置氢量增加,置氢TC21合金粉末热等静压后制品密度逐渐增大;热等静压后制品的组织呈片层状、α/β集束状和网篮状组织,退火除氢后原始组织中片状和长条状的α/β集束得到破碎、细化;热等静压制件真空退火后抗拉强度呈逐渐升高的趋势,其拉伸端口形貌由长条状和片状组织沿晶韧窝断裂特征,向网篮组织穿晶和沿晶共存的断裂过渡,且两种组织的断裂都具有延性特征。
An alloy was prepared by a new process route of hot isostatic pressing of hydrogen - bonding titanium alloy powder and hydrothermal treatment of titanium alloy. The influence of hydrogen dosage on the microstructure and properties of hot isostatic pressing of hydrogenation TC21 alloy powder was investigated. The results showed that the density of products increased with the increase of the amount of hydrogen supplied and the hydrogen isothermal hydrogen pressure of TC21 alloy powder was gradually increased. The microstructure of the products was lamellar, α / β bundles and basket structure annealed After the hydrogen removal, the lamellar and elongated α / β bundles were broken and refined. The tensile strength of the hot isostatic pressing increased gradually after vacuum annealing, The fractures along the dimples of the lamellar and lamellar structures transition to the intergranular fractures of the baskets and the ductile characteristics of both types of fractures are observed.