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本文通过直接向炉内滴注甲醇、丙酮渗碳及在滴液同时通氨进行碳氮共渗的工艺研究,指出控制炉气碳势、氮势的理论依据。介绍了气体渗碳炉通过改装,并利用红外线CO_2分析仪可实现对炉气碳势、氮势的测量和控制。研究了几种因素对气体渗碳和碳氮共渗的影响规律及生产中的工艺规程。通过对共渗层碳氮浓度的分布、硬度的分布、金相组织的分析和接触疲劳强度的试验,指出红外仪测控滴液通氨碳氮共渗的工艺是可行的,并指出气体碳氮共渗较之渗碳有较多的优越性。
In this paper, the direct carbonation of methanol and acetone in the furnace and carburizing during the simultaneous dripping of ammonia were studied, and the theoretical basis for controlling the carbon and nitrogen potential in the furnace gas was pointed out. The introduction of gas carburizing furnace through conversion, and the use of infrared CO_2 analyzer can be realized on the carbon gas potential, nitrogen potential measurement and control. The influence of several factors on gas carburizing and carbonitriding and the process rules in production were studied. Through the distribution of carbon and nitrogen concentration, the distribution of hardness, the microstructure and the contact fatigue strength of the co-permeable layer, it is pointed out that it is feasible to measure the dripping ammonia-carbonitriding by infra-red instrument. It is pointed out that the carbon and nitrogen Permeation than carburizing have more advantages.