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借助光学显微镜和室温拉伸试验,研究了固溶处理对Ti-26合金显微组织和拉伸性能的影响。研究表明:Ti-26合金理想固溶处理工艺为790℃处理40 min,经该工艺处理后晶粒尺寸适度,强度、塑性匹配良好。固溶温度越高,β晶粒尺寸越大,温度超过790℃时,抗拉强度和塑性参数呈恶化趋势。水冷、油冷和空冷所得合金显微组织差异不明显,但炉冷速度较慢时,β→α相转变相对完全,β晶界和晶粒内析出球状次生α相,直接导致合金抗拉强度大幅提升,塑性明显下降。
The effects of solution treatment on the microstructure and tensile properties of Ti-26 alloy were studied by means of optical microscope and room temperature tensile test. The results show that the ideal solution treatment of Ti-26 alloy is at 790 ℃ for 40 min, and the grain size is moderate and the strength and plasticity are well matched after the treatment. The higher the solution temperature is, the larger the β grain size is. When the temperature exceeds 790 ℃, the tensile strength and plasticity parameters show a deteriorating trend. The microstructure of the alloy obtained by water cooling, oil cooling and air cooling is not obvious. However, when the furnace cooling speed is slow, the transformation of β → α phase is relatively complete, and the spherical secondary α phase precipitates in β grain boundaries and grains, Strength increased dramatically, ductility decreased significantly.