对离心力场作用下液态金属充型流动过程中气体的溶解度、气泡的形核条件、形核功、临界形核半径以及形核率进行了定量研究. 结果表明,在离心力场作用下气体的溶解度是一个梯度量, 随着离心半径和离心角速度的增大而增大;气泡的形核功和临界形核半径也随着离心半径和离心角速度的增大而增大,而气泡的形核率相应地减小; 离心半径和离心角速度越大,对气体溶解度和气泡形核的影响越明显;因此, 在离心力场作用下可通过提高离心旋转角速度和离心半径减少气孔缺陷.
By means of quantitative analysis method, gas solubility, gas bubble nucleation condition, nucleation work, critical nucleation radius, and nucleation rate in centrifugal casting liquid metal filling and flow process are studied. The results show that with increasing the centrifugal radius and angular velocity, gas solubility as a gradient vector in centrifugal field, gas bubble nucleation work, and critical nucleation radius increase, but gas bubble nucleation rate decreases. Meanwhile, the effect of the centrifugal radius and angular velocity on gas solubility and gas bubble nucleation is more significant with their increasing. Therefore, porosity can be reduced through increasing the centrifugal radius and angular velocity in centrifugal field.
参考文献
| [1] |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%