为了深入研究钛合金离心铸造缩孔缺陷,采用微晶蜡作为物理模拟介质,按照相似准则,模拟了离心力场下钛合金凝固成形过程中缩孔缺陷,研究了旋转速度和离心保持时间对离心铸造缩孔缺陷的影响规律.实验结果表明:随着旋转速度的增加,微晶蜡凝固件冒口处缩孔缺陷体积增大;与离心保持时间900 s时相比,保持时间30 s时冒口处的缩孔缺陷体积相应减小,冒口补缩效果减弱.同时实际浇注了钛合金铸件,试验结果和物理模拟结果相吻合,验证了物理模拟试验结果的正确性.
In order to investigate the shrinkage cavity of titanium alloy castings in centrifugal field,the effects of rotation speed and centrifugal holding time on the shrinkage cavity are studied.The results show that with the in crease of the rotation speed,the volume of shrinkage cavity of microcrystalline wax castings when riser increases.As the centrifugal holding time decreases from 900s to 30s,the volume of shrinkage cavity greatly decreases,and the feeding effect of the riser decreases.Physical simulation of...