Hikichi H, Nasu T, Matsumoto N, Noguchi H
Shika Rikogaku Zasshi. 1977 Apr;18(42):103-9.
A alloy has its constant coefficient of casting shrinkage, but its value is changed by casting conditions. This time, we studied with effect of core which exist inside the cast. The results obtained were as follows: 1. The more the strength of core material increases, the smaller the coefficient of casting shrinkage becomes. 2. The smaller the thermal expansion coefficient of core material in solid state, the smaller the casting shrinkage. 3. In case of Silver-Palladium-Gold casting alloy, its actual casting shrinkage (y) has a multiple correlation with the compressive strength (x1) of core material in high temperature, and with the difference (x2) of the original casting shrinkage of the alloy from the casting shrinkage of core material, that is, y = -0.0023x1 + 0.0087x2 + 1.4927 4. Silver-Indium casting alloy is hard to be influenced by the quality of core material, for the alloy has a small shrinkage force.
合金具有其恒定的铸造收缩系数，但其值会因铸造条件而改变。此次，我们研究了铸件内部型芯的影响。得到的结果如下：1. 型芯材料的强度越高，铸造收缩系数越小。2. 固态型芯材料的热膨胀系数越小，铸造收缩越小。3. 对于银钯金铸造合金，其实际铸造收缩率（y）与高温下型芯材料的抗压强度（x1）以及合金原始铸造收缩率与型芯材料铸造收缩率之差（x2）存在多重相关性，即y = -0.0023x1 + 0.0087x2 + 1.4927 4. 银铟铸造合金因收缩力小，难以受到型芯材料质量的影响。
