The major reason of the formation of quench cracks is the contamination of oxygen in the early processing or unsuitable quench cooling rate during heat treatment.
基于两种机制的提出，可以较好地说明影响淬火裂纹形成的主要原因是氧的污染和不适宜的淬火冷却速度。
A tendency to harden by rapid cooling necessitates the use of preheat to remove the quench effect of cold metal, and to reduce the cooling rate.
强化的趋势迅速冷却，有必要制定预热来消除冷金属淬火效果，并减少冷却速率。
Combined with measured cooling curves, the TTP curve was used to predict the influence of quenching rate on the hardness of 7055 aluminum alloy by quench factor analysis method.
采用分级淬火的方法测定了7055铝合金的温度—时间—性能(ttp)曲线，并结合合金实际淬火冷却曲线通过淬火因子分析方法预测了合金的硬度。
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