【摘要】 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CO₂法及红外线CO₂—CH₄二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CO₂一元控制法除自动控制炉气中CO₂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、H₂、CH₄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CH₄值增加与不稳定,碳势波动较大。而CO₂—CH₄二元控制碳势法,由于控制了炉气中的CO₂与CH₄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。更多还原

【Abstract】 This Paper describes the test and study on the technique of controlling the carbon potential of furnace atmosphere by the ultra-red ray CO₂ method and ultra-red rey CO₂-CH₄ binary method on the shaft type carburizing furnace with methanol and kerosene as drip feed agents.According to the research result and the state of industrial application, the characteristics of these two control methods are compared. It is pointed out that the CO₂ men.control method, aside from the automatic control of CO₂ in the furnace atmosphere within a fixed limit, also requires skilled operation technique. In order to ensure the stability of the CO, H₂, CH₄ composition of furnace atmosphere, attention shoutd be paid to regulate the drip quantity proportion between methanol and keros.ene. It is best to set the controlling range of carbon potential of this method at 0.7-0.9% C.If the earburization is carried out under high carbon potential, due to increase of CH₄ value and its unstability, the fluctuation of carbon potential will be quite large. Whereas the CO₂-CH₄ binary carbon potential control method,owlng to the fact that it can control the CO₂ and CH₄ values in the furnace atmosphere, is more rational than the moncontrol method and provides wider controllable range. It also improves the precision of carbon potential control, hence may be regarded as arather fine control method.更多还原