固溶时效处理对Ti-15-3合金显微组织及力学性能的影响  

Effects of Solution and Ageing on Microstructure and Mechanical Properties of Ti-15-3 Alloy

作　　者：侯世耀[1] 王平[1] 雷家峰[2] 刘羽寅[2] 刘建荣[2] 

机构地区：[1]东北大学材料电磁过程研究教育部重点实验室,辽宁沈阳110004 [2]中国科学院金属研究所,辽宁沈阳110016

出　　处：《金属热处理》2007年第4期23-26,共4页Heat Treatment of Metals

摘　　要：用金相显微镜、透射电镜和电子拉伸机研究了固溶时效处理对Ti—15—3合金组织和力学性能的影响。结果表明，Ti-15-3合金经固溶与时效处理后，析出的针状α相随原始β相晶粒尺寸的增大而变得细小、均匀，合金的强度增大，塑性降低；在仅相析出形式一致的前提下，强度的高低取决于α相的尺寸和α相所占体积分数；在650～710℃高温时效状态下，温度越高析出的α相越少且尺寸细小。因此，合金的强度和塑性受α相的数量、大小、均匀性等综合因素的影响。Effects of solution and ageing treatments on the microstructure and mechanical properties of Ti-15-3 alloy were studied by metalloscope,TEM and electron tensile testing machine. The results show that along with β phase grain size increasing the acicular α phase precipitated becomes fine and even, the strength of the alloy increases and the plasticity decreases after the solution and ageing treatments. Under the prerequisite for identical forms of α precipitation, the strength of the alloy depends on α phase size and α phase proportion in volume. In the condition of ageing with high temperature from 650℃ to 710℃ ,the α phase precipitated becomes less in volume and fine in size with the temperature rising. Therefore, the strength Kev words,Ti-15-3 titani and plasticity are influenced by synthetical factors of α phase＇s quantity,size and homogeneity.

关 键 词：TI-15-3合金 Α相 高温时效 组织与性能 

分 类 号：TB331[一般工业技术—材料科学与工程] TG156.93[金属学及工艺—热处理]