(1. 西北工业大学 材料学院，西安 710012；
2. 西北有色金属研究院 钛合金研究所，西安 710016)
摘 要:
关键字: Ti40阻燃钛合金；V；Cr；热稳定性；蠕变行为；力学性能
Ti40 burn resistant titanium alloy
（1. School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710012, China;
2. Titanium Alloy Research Center, Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China）
Abstract:Four alloys with different contents of V and Cr were prepared on the base of Ti40 alloy. Their properties and microstructures after forging, heat treatment, thermal exposure and creep treatment were tested. The results indicate that the effect of alloying elements V and Cr on mechanical properties at room-temperature, creep behavior and microstructures are similar. With increasing contents of V and Cr, their mechanical properties produce little change, the creep resistant property decreases and microstructure grows, which is mainly due to their characteristics of β-stability element and smaller atomic radius compared with Ti. On the contrary, the effects of V and Cr on the thermal stability are quite different. With increasing V content or decreasing Cr content the thermal stability for the alloy becomes better, which may be due to the different solution characteristics of V and Cr element in titanium alloy that V belongs to isomorphous β-stability element and Cr belongs to eutectoid β-stability element.
Key words: Ti40 burn resistant titanium alloy; V; Cr; thermal stability; creep behavior; mechanical properties
