固溶处理对铸造Ti2.5Al1.5MoZr钛合金组织和性能的影响  

Effects of Solution Treatment on Microstructure and Mechanical Properties of Cast Ti2.5Al1.5MoZr Alloy

作　　者：谢华生[1,2] 娄延春[1] 赵军[1] 刘时兵[1] 汪志华[1] 刘宏宇[1] 史昆[1] 

机构地区：[1]沈阳铸造研究所,辽宁沈阳110022 [2]沈阳工业大学,辽宁沈阳110023

出　　处：《铸造》2010年第2期138-140,共3页Foundry

摘　　要：对铸造Ti2．5Al1．5MoZr钛合金在不同固溶温度、不同冷速条件下的显徽组织和力学性能进行了研究。结果表明：在850～920℃范围内，随固溶温度的升高，该合金的显微组织逐步细化，短棒状初晶α相增加明显，α相间距增大，残留β相和转变马氏体增加，强度增加，塑性降低；随固溶冷却速度的增加，组织中的魏氏体逐渐减少，网篮状组织明显增加，初晶α相出现短棒化趋势，强度增加，塑性降低。Microstructure and mechanical properties of cast Ti2.5Al1.5MoZr alloy at different solution temperatures and different cooling rates were investigated. The results show that in the range of 850-920 ℃, with the increase of solution temperature, the microstructures of alloy were refined, quantity of short-rod primary a phases increased obviously, and the space between a phases, quantity of residual 15 phases and martensite also increased. Those resulted in the increase of strength and decrease of plasticity of the alloy. With the increase of cooling rate after solution treatment, quantity of the Widmanstaten structure decreased gradually, and the network structure increased obviously; primary a phases became shorter and refined. These increased strength and decreased plasticity of the alloy.

关 键 词：固溶 钛合金 显微组织 Ti2.5Al1.5MoZr 性能 

分 类 号：TG156.94[金属学及工艺—热处理]