结果：所有标本都有不同程度的凝固收缩。
Results: All the luting cements had different extent curing shrinkage.
为提高预测铸件凝固收缩缺陷的准确度，提出了频率因子的概念。
A conception of "frequency factor" is suggested for improving the accuracy to forecast the shrinkage defects.
实践证明采用均衡凝固收缩模数法设计液压试验平台浇冒口系统是可行的。
The practice shows that it is feasible to design kiss gating-feeder of hydraulic test platform by applying moduli calculation method.
最后分别讨论了钢种、结晶器长度、拉坯速度、铸坯断面尺寸与结晶器锥度、凝固收缩系数的关系。
In the end the relationship of steel grades, mould length, drawing speed and sectional dimensions of the billet with mould taper and solidification and contraction coefficient has been discussed.
得到有益于认识铸件中此类接头凝固特性和热节位置的变化规律，对工艺设计者认识和防止成型过程中产生凝固收缩缺陷是很必要的。
The results are very important to understand the solidification characters of steel castings with T conjunction and to estimate the position of the hot-spot in the castings to avoid shrinkage defects.
主要是明显的尺寸效应和凝固、收缩、应力等问题，避免或减少铸铁井盖的成分偏析、变形、开裂等缺陷的产生。
Is mainly the size effect and solidification, shrinkage, stress and other issues clearly, to avoid or reduce the segregation, iron manhole cover deformation and crack defects.
其目的是当熔化金属凝固和收缩时往型腔里补充熔化金属，从而防止在主铸件中产生孔隙。
The purpose of this is to feed the molten metal to the mold cavity as the molten metal solidifies and shrinks, and thereby prevents voids in the main casting.
同时调整碳硅含量，可有效地改变灰铸铁凝固转变过程的体积收缩和膨胀特性。
By changing the carbon and silicon in a proper way at the same time, the volume expansion or shrinkage feature in the cast iron solidification can be significantly changed.
研究表明：轮毂的工艺缺陷主要为缩孔、缩松以及凝固过程中收缩导致的裂纹缺陷，主要分布在轮辋、辐条交汇的热节部位。
The results indicate that the casting defects are mainly shrinkage porosity and cracks caused by solidification shrink, which mainly presents in the hot spot between the spoke and the rim.
聚丙烯纤维在各个方向上对抗着水泥收缩的应力，因此提高了防水砂浆凝固后的强度，同时具有提高耐火极限的作用。
The polyacrylic fiber resists the stresses of cement shrinking in different directions to raise the strength of solidified waterproof mortar and raise the fireproof limit.
当这种钢液凝固时，在钢锭头部中央会形成收缩孔。
When such a steel solidifies, a shrinkage cavity know as a "pipe" is formed in the top central part of the ingots.
当这种钢液凝固时，在钢锭头部中央会形成收缩孔。
When such a steel solidifies, a shrinkage cavity know as a "pipe" is formed in the top central part of the ingots.
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