【摘要】 以氢共晶合金为对象,通过建立热力学数学模型,研究定向凝固工艺对氢共晶合金中气孔平均间距与直径的影响。结果表明,多孔Cu连铸试样中气孔的平均间距和直径随着下拉速率的增加而逐渐减小。下拉速率较小时,理论预测与实际测量结果存在明显差异。随着下拉速率的增加,两者的吻合度提高,预测效果较好。更多还原

【Abstract】 The pore characteristic of porous Cu and its mathematical modening were analyzed, and the effect of directinal freezing process on pore diametral and separation distance was studied. The results show that the average separation distance and pore diametral of the pore in the porous Cu samples decrease with the increasing of drop-down rate. The predicted results are obvious difference from the actual results when the drop-down rate is small. Both results are basically consistent with the increasing of the drop-down rate.更多还原