如何保证冷却时易于产生裂纹的钢零件的淬火质量,是热处理实践中的一个重要问题。大家都知道,在低温转变范围内,冷却速度越低,淬火时零件产生裂纹的危险性越小。对于大多数的淬火剂来说,当减小低温转变范围内的冷却速度时也就会减小高温转变范围内的冷却速度。因此,目前选择工业上适用的淬火剂,主要是依靠往水中添加能够使溶液的沸腾温度向钢中珠光体转变区域靠移的物质,并保 How to ensure that the quenching quality of steel parts that are prone to cracking during cooling is an important issue in the heat treatment practice. We all know that in the low-temperature transition range, the lower the cooling rate, the risk of cracking parts of the less quenching. For most quenchants, the cooling rate in the high-temperature transition range is reduced when the cooling rate in the low-temperature transition range is reduced. Therefore, the current choice of industrially applicable quenching agent, mainly by adding to the water can make the solution boiling temperature shift to the pearlite transformation of steel material, and Paul