solidification shrinkage

The numerical simulation of3D temperature field of castings during solidification process was carried out and the shrinkage cavity and porosity of sample castings were predicted using G/ R method.

对铸件开展了凝固过程三维温度场数值模拟，并应用G／R法对铸件进行了缩孔缩松预测。

The results showed that the graphite deposited during the period of primary and eutectic crystal helped to reduce the contract of liquid state and solidification, to improve the tendency of shrinkage cavity and porosity.

实验结果表明，初晶、共晶期间析出的石墨有助于减少液态收缩与凝固收缩，改善耐热球墨可锻铸铁形成缩孔缩松的倾向。

These blow holes counteract the shrinkage which occurs during solidification and no pipe is formed.

这些气泡抵消了凝固时出现的收缩,因此不会形成缩孔.

The presentation of MTC solidification research idea provide an approach of solving shrinkage and other defects.

并将其应用于凝固成形,提出了进一步研究设想,可提供新的解决收缩缺陷及其他缺陷的有效途径.

The strength theory, dendritic bridging theory, solidification shrinkage reparing theory and CSC criterion, HCS criterion are stressed.

重点介绍了强度理论 、 晶间搭桥理论 、 凝固收缩补偿理论和CSC判据 、 HCS判据.

Secondly, the influence of solidification shrinkage was considered by increasing thermal expansion coefficients of elevated temperature.

其次, 通过加大材料的线膨胀系数,考虑了凝固收缩对熔池尾部应力应变场的影响,最终得到了各种条件下的焊接应力-应变场.