选择有效结晶温度范围小的铝合金、采用金属型铸型以及逐层凝固的冷却方式可以有效消除裂纹。
To prevent from heat crack, the choose of aluminum alloy with small crystal temperature range and the use of metal cast model, as well as adoption of gradual solidification style will be effective.
通过实际生产从工艺角度分析了底注法生产窄结晶温度范围高强度黄铜时夹杂、缩孔缺陷的产生机理。
The mechanism of the inclusion and shrinkage cavity in high-strength brasses produced by bottom running method was analyzed from the point of view of production technology.
采用＂中断法＂研究了取向硅钢二次再结晶过程中的异常长大行为，确定了二次再结晶发生的温度范围。
The secondary recrystallization and its temperature range of grain oriented silicon steel have been studied by the method of interrupting secondary recrystallization annealing.
同时，讨论了添加剂的添加量范围和适宜的结晶温度。
Meanwhile, the range of additive contents and crystal temperature were discussed.
结果表明，奥氏体的再结晶发生在钢的正常淬火温度以上的一个温度范围，并在该范围内存在晶粒细化效果最佳的温度区域；
The results showed that the austenite recrystallization occurs in a temperature range biger than thenormal quenching temperature and there is an optimum temperature range for the grain refining.
结果表明，奥氏体的再结晶发生在钢的正常淬火温度以上的一个温度范围，并在该范围内存在晶粒细化效果最佳的温度区域；
The results showed that the austenite recrystallization occurs in a temperature range biger than thenormal quenching temperature and there is an optimum temperature range for the grain refining.
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