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一、高频氮化——国营长虹机器厂该厂1963年参考兄弟厂的经验,采用了高频氮化,效果显著,沿用至今。氮化装置示意如下图。对38CrMoAlA钢进行高频氮化的工艺参数是:氮化温度 520～580℃;保温时间,80～120分;热源,260型高频发生器;停止加热后,在风扇气流冷却下炉冷15～30分后出炉。此项工艺的特点是:1.操作方便,系统简单,由于炉膛是透明的,对零件的氮化全过程是直观的,温度高低,均匀程度,零件的质量情况都看得见,情况如有变化可以随时调整各个参数;2.生产效率高,氮化80～122分钟后,层深可达0.12～0.25毫米,比一般气体氮化的速度快5倍以上;3.渗层抗蚀性好;4.
First, the high-frequency nitriding - State-owned Changhong Machine Factory The plant in 1963 reference brothers plant experience, the use of high-frequency nitriding, the effect is significant, still in use. Nitride device shown below. The technological parameters of high-frequency nitridation of 38CrMoAlA steel are as follows: the nitriding temperature is 520-580 ℃; the holding time is 80-120; the heat source and type 260 are high-frequency generator; after the heating is stopped, ~ 30 minutes after the release. The process is characterized by: 1. Easy to operate, the system is simple, because the furnace is transparent, the entire process of the part of the nitriding is intuitive, the temperature level, the degree of uniformity, the quality of the parts are visible, if any 2. The production efficiency is high, the layer depth can reach 0.12-0.25 mm after 80-122 minutes of nitriding, which is more than 5 times faster than that of the general gas nitriding; 3. The corrosion resistance of the coating is good 4.