热处理对TA19钛合金组织和力学性能的影响  

Effects of heat treatment on microstructure and mechanical properties of TA19 titanium alloy

作　　者：朱雪峰[1] 余日成[1] 黄艳华[1] 杨胜[1] 

机构地区：[1]湖南金天钛业科技有限公司,湖南常德415001

出　　处：《金属热处理》2015年第2期103-106,共4页Heat Treatment of Metals

摘　　要：通过改变固溶温度、固溶后的冷却方式和时效温度,研究了热处理制度对TA19钛合金微观组织和力学性能的影响。研究表明,随着固溶温度的升高,初生α相含量减少,使得伸长率和断面收缩率减小;而升高固溶温度使得β相中析出的细小次生α相增多,从而使室温抗拉强度增大。固溶处理后采用水冷时,由于从β相中析出大量细小弥散的次生α相,室温抗拉强度较大,但伸长率和断面收缩率较小。时效温度对微观组织和力学性能影响较小。Effects of solution temperature, cooling rate and aging temperature on microstructure evolution and mechanical properties of TA19 titanium alloy were investigated. With increasing of solution temperature, the volume fraction of primary α phase decreases, making the elongation percentage and reduction of area decrease, but the more and fine secondary α phase precipitated from β phase makes the room temperature tensile strength increase. As the TA19 titanium alloy cooled in water after solution treatment, a large amount finer secondary α phase precipitated from 13 phase, so the tensile strength increases, but the elongation and reduction of area decreases. Additionally, the aging temperature slightly affects microstrueture and mechanical properties of the TA19 titanium alloy.

关 键 词：TA19钛合金 热处理 微观组织 力学性能 

分 类 号：TG166.5[金属学及工艺—热处理]