CAJ | 학술논문

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微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.
대주조Ti2.5Al1.5MoZr태합금재불동고용온도、불동랭속조건하적현미조직화역학성능진행료연구.결과표명:재850～920℃범위내,수고용온도적승고,해합금적현미조직축보세화,단봉상초정α상증가명현,α상간거증대,잔류β상화전변마씨체증가,강도증가,소성강저;수고용냉각속도적증가,조직중적위씨체축점감소,망람상조직명현증가,초정α상출현단봉화추세,강도증가,소성강저.
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 α phases increased obviously, and the space between α phases, quantity of residual β 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 α phases became shorter and refined. These increased strength and decreased plasticity of the alloy.