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氮化是提高机器零件硬度、耐磨性、疲劳强度及耐蚀性的重要热处理工艺。近年来,随着机械设备运转速度的加快和精度要求的提高,这种工艺日益显示其重要性。但是,在一般氮化和软氮化法中,有的处理周期很长,有的采用或生成剧毒的氰化物,有的要消耗大量氨和吸热型气氛或乙醇等热能资源,有的还有爆炸危险。1974年西德赫里公司提出了在氨中加入CO_2或放热型气氛的氮化法,可有效缩短处理时间,节约热能,而且无公害、无爆炸危险,引起了人们的注意。国内有的单位也进行了研究。为了进一步探讨CO_2氮化过程特点与效果,我们在自制小型贯通式氮化炉中进行了一系列实
Nitriding is to improve the mechanical parts hardness, wear resistance, fatigue strength and corrosion resistance of the important heat treatment process. In recent years, with the accelerated operation of machinery and equipment and precision requirements increased, this process has increasingly shown its importance. However, in the general nitriding and nitrocarburizing methods, some treatment cycles are long, some use or generate highly toxic cyanide, some consume a large amount of ammonia and endothermic atmosphere or thermal energy resources such as ethanol, and some There is also a danger of explosion. In 1974, the company introduced the nitridation method of adding CO 2 or exothermic atmosphere into ammonia, which can effectively shorten the processing time and save the heat energy, and it is pollution-free and non-explosive, attracting people’s attention. Some domestic units also conducted a study. In order to further explore the characteristics and effects of CO_2 nitriding process, we made a series of experiments in self-made small through-type nitriding furnace