论文部分内容阅读
研究了不同固溶温度与冷却方式对Ti-4.5Al-2.5V-1.5Fe-0.25O热轧板材显微组织及力学性能的影响。结果表明:热轧合金板材组织主要由α相和β相组成,随着固溶温度从910℃升高到1000℃,板材中α相含量减少而β相含量逐渐增多,初生等轴α相向针状β相转变进而向全片层状β相转变;空冷冷却速度较慢,高温组织有很大一部分发生分解,而水冷冷却抑制高温析出相析出及分解,形成片层状β转变组织;随着固溶温度的升高,合金板材抗拉强度先增加后减小,伸长率降低;940℃固溶后水冷处理的合金板材力学性能最优:抗拉强度1264 MPa,伸长率11.4%。
The effects of different solution temperature and cooling method on the microstructure and mechanical properties of Ti-4.5Al-2.5V-1.5Fe-0.25O hot-rolled sheet were studied. The results show that the microstructure of hot-rolled alloy sheet mainly consists of α-phase and β-phase. With the increase of solution temperature from 910 ℃ to 1000 ℃, the content of α-phase decreases and the content of β-phase increases gradually. Phase β phase transition to the whole lamellar β phase transition; air cooling slow, high temperature tissue a large part of the decomposition, and water cooling to inhibit precipitation and precipitation of high temperature precipitation, the formation of lamellar β transformation; With the Tensile strength of the alloy sheet first increases then decreases and elongation decreases; the mechanical properties of the alloy sheet after solution heat treatment at 940 ℃ are the best: tensile strength of 1264 MPa and elongation of 11.4%.