(1. 有研亿金新材料股份有限公司，北京 102200；
2. 北京有色金属研究总院，有色金属材料制备加工国家重点实验室，北京 100088)
摘 要: 本文采用光学显微镜(OM)、X射线衍射(XRD)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)等对Ti-2.3Cr-1.3Fe低成本钛合金固溶后的组织和力学性能进行观察、分析和研究。固溶条件为：温度930 ℃，保温时间分别为0.5 h、1.0 h、1.5 h和2.0 h，水淬(WQ)。研究结果表明：固溶后该合金的组织由β相、马氏体和ω相组成，合金强度随固溶时间延长而缓慢降低，抗拉强度最高为1 165 MPa，此时合金的延伸率最低仅为2.5%，主要是该合金固溶后的组织中含有ω相所致。
关键字: 钛合金；Ti-2.3Cr-1.3Fe；显微组织；力学性能
（1. Grikin Advanced Materials Co., Ltd., Beijing 102200, China;
2. State Key Laboratory of Nonferrous Metals and Processes,
General Research Institute for Nonferrous Metals, Beijing 100088, China）
Abstract:After solution treatment, microstructure and tensile properties of Ti-2.3Cr-1.3Fe low cost alloy were studied through the methods of XRD, OM, SEM and TEM. The results indicate that the microstructure of alloy includes β phase, martensite and ω phase after solution treatment; the strength decreases with increasing solution time. Under the β phase heat treatment condition of 930 ℃ for 0.5 h, 1.0 h, 1.5 h and 2.0 h, WQ, the tensile strength is 1 165 MPa with 2.5% in elongation. As a result of the ω phase exists; the plasticity of alloy is low after solution treatment.
Key words: titanium alloys; Ti-2.3Cr-1.3Fe; microstructure; mechanical property
