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气体渗氮的全新方法已被应用于渗氮过程,其前提是由氮势Np来控制渗层厚度和成分从而控制白亮层的性能。 氮势的表达式为;Np=P_(NH)_3/(P_H_2)3/2 其中:P_(NH)_3和P_H_2分别为氨与氢的分压。 渗氮工艺利用一个带有独特软件的计算机控制系统,这个系统可以连续地自动修正并实行完全的自动控制。每种钢所设计的工艺被输入计算机后即用于控制系统,从而保证了随后的批量生产的重现性。目前,氮势可控渗氮工艺已被用于各种特殊钢的渗氮。
A new method of gas nitriding has been applied to the nitriding process on the premise that the thickness and composition of the layer are controlled by the nitrogen potential Np to control the performance of the white layer. The N potential is Np = P_ (NH) _3 / (P_H_2) 3/2 where P_ (NH) __3 and P_H_2 are the partial pressure of ammonia and hydrogen, respectively. The nitriding process utilizes a computerized control system with unique software that automatically corrects and implements complete automatic control continuously. Each type of steel is designed to be used in the control system after being fed into the computer, thus ensuring the reproducibility of subsequent mass production. At present, nitrogen potential controlled nitriding process has been used for various special steel nitriding.