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本文阐述在井式渗碳炉上,以甲醇—煤油作滴注剂,采用红外线CO_2法及红外线CO_2—CH_4二元法控制炉气碳势技术的实验研究。根据研究结果及工业应用情况,比较了两种控制方法的特点。论述了CO_2一元控制法除自动控制炉气中CO_2在一定范围內以外,还要求有熟练的操作技术,注意调节甲醇与煤油的滴量比例,以保证炉气成份CO、H_2、CH_4的稳定性。该方法碳势控制范围以0.7～0.9％C最佳。若在高碳势下渗碳,因CH_4值增加与不稳定,碳势波动较大。而CO_2—CH_4二元控制碳势法,由于控制了炉气中的CO_2与CH_4值,因此比一元控制法更为合理,可控范围较宽,提高了碳势控制精度,是一个很好的控制方法。
In this paper, the experimental research on carbon potential of furnace gas controlled by infrared CO_2 method and infrared CO_2-CH_4 binary method is described in pit type carburizing furnace with methanol-kerosene as instillation agent. According to the research results and industrial applications, the characteristics of the two control methods are compared. In addition to the CO 2 unitary control method in addition to automatic control of CO 2 within a certain range, but also requires skilled operation techniques, pay attention to adjust the proportion of methanol and kerosene drops in order to ensure the stability of the furnace gas components CO, H_2, CH_4 . The method of carbon potential control range of 0.7 to 0.9% C best. If carburizing at high carbon potential, due to CH_4 value increases and instability, carbon potential fluctuations. The carbon potential of CO_2-CH_4 binary control is more reasonable than the one-element control method due to the control of the CO_2 and CH_4 values in the furnace gas, so the controllable range is wide and the carbon potential control accuracy is improved. This is a good Control Method.