在Gleeble-3800热模拟实验机上对BTi-62421S合金铸态材料,在温度850～1 050 ℃、应变速率0.01～30 s-1、变形程度70%条件下进行了等温恒应变速率压缩实验.通过金相分析,研究热变形参数(变形温度、应变速率)对BTi-62421S合金微观组织的影响.结果表明,变形温度和应变速率显著影响片层组织等轴化的程度,在β相变点以下,随着温度的升高,片层组织等轴化程度增大,组织更均匀.对变形后的试样做了硬度实验,结果表明合金的硬度开始随着温度的升高而升高,出现峰值后降低.
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