枝晶间距是重要的铸态组织参数。
Dendrite arm spacings is one of the important as-cast structural parameters.
研究了差压铸造不同工艺参数对A357合金二次枝晶间距的影响。
The effect of counter-pressure casting parameters on secondary dendrite arm spacing (SDAS)of A357 alloy was studied.
结果表明，提高冷却速率使合金二次枝晶间距及碳化物的尺寸减小。
The results indicate that both the length of secondary dendrite spacing and the size of carbides reduce with the increasing of cooling rate.
通过确定凝固速度的表达式，定量计算了连铸过程中一次枝晶间距。
Based on the conformation of the solidification rate expression, the quantitative calculation of the primary dendritic spacing in the continuous casting was done.
并且随着对流强度的加大，一次枝晶间距降低，二次枝晶的生长被抑制。
Meanwhile, the primary dendrite spacing is decreased and the secondary dendrite branches are restrained.
探讨了铸坯中一次枝晶间距的变化规律及其“鼓肚”量对枝晶间距的影响。
The variation rule of the primary dendritic spacing in the casting blanks and the effect of the bulge size on dendritic spacing were studied.
用数学回归的方法得到了AZ91镁合金的凝固冷却速度与二次枝晶间距的定量关系式。
The quantitative relationship between secondary dendrite arm spacing and solidification cooling rate of AZ91 was obtained by regressive analysis.
通过数学模拟计算凝固过程的温度场，进而计算二次枝晶间距是获得合理凝固组织的有效手段。
It's an effective method to obtain reasonable solidification structure by computing temperature field and the secondary dendrite arm spacing using mathematical model.
通过测定二次枝晶间距来预测铸件的抗拉性能是可行的，但是孔洞率对抗拉强度的影响不可忽视。
It is feasible to forecast the casting UTS by measuring DAS, but the effect of hole ratio on UTS should not be neglected.
当试样铜含量从1.77%增加到3.00%时，一次枝晶间距逐步增大，但枝晶间距增加幅度较小；
When the content of copper increases from 1.77% to 3.00%, the primary dendritic spacing gradually presents enlarging tendency, but the adding argument is not great.
结合实验和模拟结果，得出该合金的晶粒尺寸、一次枝晶间距、二次枝晶臂间距随冷却速率增大而明显减小。
The results show that the grain average size and the primary and secondary dendrite arm space were obviously reduced with the increase of cooling rate.
对具有不同枝晶间距的CMSX-2单晶高温合金的凝固组织特征及其对热处理组 织和持久性能的影响进行了研究。
The effect of solidified structure characteristics on heat-treated structures and rupture properties was studied in CMSX-2 single crystals with different arm spacing.
研究枝晶二次臂间距对于提高铸件力学性能有重要意义。
Research on secondary arm spacing has important significance for improving the mechanical properties of castings.
二次枝晶臂间距变化不明显。
However, the second dendrite arm spacing (SDAS) changes little.
二次枝晶臂间距变化不明显。
However, the second dendrite arm spacing (SDAS) changes little.
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