实验与模拟计算相结合研究Ti-6Al-4V(TC4)合金在陶瓷壳型离心精铸条件下,铸件模数对凝固过程冷速的影响,以及铸件组织、性能随模数和冷速之间的统计关系.结果表明:当铸件模数较小时,模数大小对凝固过程冷速影响比较显著,而随着模数的进一步增加,当M＞7.00 mm时,铸件冷却速度随模数变化并不明显;晶粒尺寸、α/β片层厚度及二次枝晶间距均随铸件模数的增加及冷速的减小而增大,抗拉强度则呈现相反趋势.得出了TC4离心精铸件组织、性能与铸件模数和冷速之间定量关系的表达式.
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