【摘要】 通过分析传统调质热处理工艺在对螺栓进行热处理时存在的不足，提出了双介质冷却正火新工艺，采用该工艺可控制不同直径螺栓的冷却速度，从而保证零件热处理后的力学性能。该工艺还可用于其它轴杆类零件的热处理。更多还原

【Abstract】 This article introduces a new normolizing process in which two phase cooling medium are used, which basies on a great number of analysing on traditional quenching and tempering. The use of this process can easily control the cooling speed in different sizes of bolts.更多还原