研究了卡套薄壁的薄层气体氰化工艺,使用三乙醇胺、滴入改装的井式炉中。炉子温度为800℃,氰化时间为5分钟,在180℃回火一小时后,卡套表面的硬度可大于Hv680,由于氰化的温度比较低,淬火速率低,所以卡套变形很小,其直径的变化不大于0.3mm。处理后卡套具有良好的韧性,这与它表面具有较多的残余奥氏体及心部具有较少的马氏体有关 The thin-walled, thin-walled, gas cyanidation process was studied using triethanolamine and dropped into a modified pit furnace. Furnace temperature is 800 ℃, cyanidation time is 5 minutes, after tempering at 180 ℃ for an hour, the hardness of the ferrule surface can be greater than Hv680. Because the temperature of cyanidation is lower and the quenching rate is lower, the ferrule deformation is very small, Its diameter change of not more than 0.3mm. After handling the sleeve has good toughness, which has more surface with retained austenite and the heart has less martensite