高强韧TB8钛合金的热处理制度  

Heat treatment of TB8 titanium alloy with high strength and toughness

作　　者：李敏娜 马保飞[1] 郭金明[1] 吴晨 肖松涛[1] Li Minna;Ma Baofei;Guo Jinming;Wu Chen;Xiao Songtao(Northwest Institute for Nonferrous Metal Research,Xi'an Shaanxi 710016,China)

机构地区：[1]西北有色金属研究院,陕西西安710016

出　　处：《金属热处理》2021年第9期116-119,共4页Heat Treatment of Metals

摘　　要：研究了不同固溶时效热处理制度对TB8钛合金棒材组织及性能的影响规律。结果表明,TB8钛合金棒材在890℃固溶热处理后可以得到单一等轴β组织,随着保温时间的延长,强度逐渐降低。经520℃不同时间时效处理后,β晶粒中析出大量次生α相,使得棒材强度显著增加。当时效保温时间为8 h时,TB8钛合金棒材时效强度达1286 MPa,并保留较好的塑性。推荐TB8钛合金棒材的固溶时效热处理制度为:890℃×30 min,WQ+520℃×8 h,AC。Effects of solution treatment and aging process on microstructure and properties of TB8 titanium alloy bars were studied.The results show that single equiaxed β grain of the alloy is obtained after 890℃ solution treatment.With solution time increasing,the strength reduces gradually.After aging at 520℃ for different time,a large number of secondary α phases are precipitated in β grains,which increases the aging strength of the bar.When aging for 8 h,the strength of the alloy reaches 1286 MPa and good plasticity is retained.The recommended solution treatment and aging system of the TB8 titanium alloy bar is 890℃×30 min,WQ+520℃×8 h,AC.

关 键 词：TB8钛合金 高强韧 固溶时效 组织性能 

分 类 号：TG166.5[金属学及工艺—热处理]