(宝鸡钛业股份有限公司，宝鸡 721014)
摘 要: 研究了退火温度对BTi62钛合金棒材显微组织及室温、高温力学性能的影响。研究表明：BTi62钛合金棒材在700~870 ℃退火，显微组织均由βT+等轴α组成，随着退火温度的升高，室温强度降低，室温塑性略有提高，高温抗拉强度、断面收缩率略有升高，屈服强度、伸长率无明显变化。与目前国内使用的同规格TC4钛合金棒材相比，BTi62合金具有略优于TC4钛合金的室温、高温拉伸性能。
关键字: BTi62钛合金；热处理制度；显微组织；力学性能
microstructure and properties of BTi62 titanium alloy
（Baoji Titanium Industry Co., Ltd., Baoji 721014, China）
Abstract:The effects of annealing temperature on the microstructure, room temperature and high temperature mechanical properties of BTi62 titanium alloy bars were studied. The results show that the microstructure of the alloy is composed of transformed β-phase and equiaxed α phase when BTi62 titanium alloy rods are annealed in the temperature range of 700−870 ℃. With the increase of annealing temperature, its room temperature strength decreases, room temperature ductility increases little, high-temperature tensile strength and area shrinkage slightly increase, while yield strength and elongation have no clear change when it is annealed in the range of 780−870 ℃. Compared with TC4 titanium alloy bars of the same specifications in domestic at present, BTi62 alloy has slightly better tensile properties at room and high temperatures.
Key words: BTi62 titanium alloy; heat treatment; microstructure; mechanical properties
