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上海交通大学研制的“微型计算机动态可控渗氮与动态碳势控制”课题于1992年3月31日在上海通过专家鉴定。该成果在以下三个方面取得了重大突破。 (1)实现了最优化工艺参数CAD软件与实时控制软件直接连接,可根据工艺过程中炉况的变化情况不断优选和修正工艺规范的控制设定值,正确控制渗层浓度分布并最大限度缩短工艺时间。 (2)率先采用一种新的控制方式,不仅能消除实测值与控制设定值之间的偏差,还可随时补偿偏差所造成的后果,这对具有大滞后特性的工艺过程的最优化控制具有重大意义,是碳势控制和可控渗氮技术的新发展。 (3)实现了不同形状表面碳浓度分布的精确控制,使渗碳齿轮的节圆、齿顶、齿根等不同部位均获得最佳的浓度
Shanghai Jiaotong University developed “micro-computer dynamic controllable nitriding and dynamic carbon potential control ” project on March 31, 1992 in Shanghai by experts. The result achieved a major breakthrough in the following three areas. (1) The CAD software of the optimized process parameters is directly connected with the real-time control software, the control set values of the process specifications can be continuously optimized and corrected according to the changes of the furnace conditions in the process, and the concentration distribution in the permeable layer can be controlled and minimized Craft time. (2) Take the lead in adopting a new control method, which can not only eliminate the deviation between the measured value and the control set value, but also compensate the consequences caused by the deviation at any time, which optimizes the control of the process with large hysteresis Is of great significance, is a new development of carbon potential control and controlled nitriding technology. (3) The accurate control of the carbon concentration distribution on the surface of different shapes is realized, and the optimum concentration of the pitch circle, addendum, tooth root and other parts of the carburized gear is obtained