采用水冷铜坩埚真空感应凝壳熔炼设备,制备离心力场下不同旋转时间的钛合金铸件,研究离心半径、补缩冒口以及旋转时间对钛合金铸件的抗拉强度、屈服强度、延伸率和显微硬度的影响规律.结果表明:离心旋转时间相同时,钛合金铸件的力学性能随着离心半径的增加而改善,有补缩冒口时可以获得力学性能优异的铸件.旋转时间15与1.5 min相比,获得的铸件力学性能更优异,这是由于铸件显微组织细化,导致晶界强化,位错滑移的阻力增大所造成的.
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