基于FGH96合金双锥体试样及圆柱试样等温压缩变形实验,研究了变形温度、应变速率及应变对晶粒异常长大的影响规律,并对双锥体试样的等温压缩进行了数值模拟计算.结果表明:通过双锥体试样等温压缩,总结出FGH96合金在变形温度960～ 1060℃,应变速率0.0032～ 0.032s-1范围内,异常晶粒长大的敏感工艺参数组合.当变形温度1040℃,压头速率0.1mm/s时,在应变0.03～0.2范围内,FGH96合金晶粒组织均匀,无异常晶粒组织出现.建立了FGH96合金的有限元模型,模拟了双锥体试样的等温压缩,得到了与试样截面晶粒分布特征相对应的应变分布.
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