摘要
本文根据约250组实测数据证明在实际生产条件下气体渗碳反应常常不能完全达到平衡,但在很大程度上仍然受平衡条件制约。气体渗碳是一种在多组份体系中几个反应同时进行的复杂过程,但在计算实际炉气的碳势时可以把一氧化碳反应(2CO=CO2+[C])作为主要反应。在不同渗碳条件下,实测含碳量与2CO=CO_2+[C]反应的平衡含碳量之间的偏差各不相同,并且有一定的规律,可用数学回归法求得各自的修正因子,使精度明显提高。多因素碳势控制方法具有很强的适应性,是一种值得推广的碳势控制技术。单因素法则必须符合其它气体成分稳定不变的条件,局限性较大。
In the paper,about 250 groups experimental data have provedthat the gas carburizing reactions always can not reach their equilibriumstates,but they are still controlled by the equilibrium condition to a largeexte(?) Gas carburizing is a kind of complicated process which involvesseveralreactions simultaneously in a polycomposition system.However,whilethe caebon potential of the practical furnace gas is calculated,it is reasonableto consider carbon monoxide reaction as the main reaction.Under variouscarburizing conditions,the errors between the experimental results of carboncontent and calculated ones are different from one to another.But still thereare some rules existing.By means of statistics,correction factor can beobtained respectively so as to improve the accuracy.Multi-factor controlof carbon potential has widely applications and it is a kind of carbonpotential control methods porpulized while mono-factor one,which requirs thecondition of constant composition of other gases during the process,has limitedthe applications.
关键词
碳势控制
平衡
气体渗碳
controlling carbon otential
equilibrium
gas carburizing
