一种解决垂直线铸件缩松的工艺方法

Method for Resolving the Shrinkage of Vertical Molding Line Casting

利用MAGMA凝固模拟软件预测垂直造型线铸件热节部位和缩松缺陷,模拟结果表明凝固后期形成的孤立热节是产生缩松的主要原因。采用顺序凝固原则可以解决部分缩松问题,但不能解决所有补缩问题。通过优化铸造工艺,改变内浇口位置并重新模拟,发现孤立热节得到了消除,试验结果与模拟吻合,缩松问题得到了彻底解决,利用凝固模拟优化冒口成功提高了铸件质量和成品率。

The MAGMA solidification simulation software was used to predict the hot spot positions and the shrinkage defects of the vertical molding line castings.The simulation results show that the isolated hot spot formed in the late solidification stage is the main cause of shrinkage defects.The sequential solidification principle can partially solve the shrinkage problem,but it cannot solve all the feeding problems.By optimizing the casting process,changing the position of the inner gate and resimulating,it is found that the isolated hot spot is eliminated,the test results are in good agreement with the simulation results,and the shrinkage problems are completely solved.The casting quality and yield are successfully improved by using the solidification simulation.