高速线材轧制Ti-6Al-4V合金小规格棒材的热处理工艺

发布时间：2018-10-24 16:23

【摘要】：利用高速线材轧机制备Ti-6Al-4V合金小规格棒材(d10 mm),研究固溶与时效热处理工艺对棒材显微组织与力学性能的影响。结果表明:棒材组织主要由α相和β相组成,随着固溶温度从900℃升高到990℃,棒材中α相含量减少而β相含量逐渐增多,显微组织出现了由初生等轴α相向针状β相转变进而向全片层状β转变的过程,棒材拉伸强度逐渐升高,而伸长率明显降低;棒材在930℃固溶后进行时效处理,随着时效温度从450℃升高到650℃,β相转变组织分解析出α相,组织主要由(α+β)相和β相混合组成,α相不断集聚长大,使组织粗大,棒材抗拉强度降低,伸长率升高;经(930℃,30 min,水淬)+(550℃,4 h,空冷)热处理后,棒材强度和塑性达到最佳配合,抗拉强度为1031 MPa,伸长率为12.5%。
[Abstract]:The effect of solid solution and aging heat treatment on the microstructure and mechanical properties of Ti-6Al-4V alloy small size bar (d10 mm),) prepared by high speed wire mill was studied. The results show that the structure of the bar is mainly composed of 伪 phase and 尾 phase. With the increase of solution temperature from 900 鈩，

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