A Practical Approach to Control Nitriding and FNC Processes

In Nitriding and FNC the critical components are Temperature, Ammonia and Carbon.  The control variables are defined as Kn (nitriding potential) along with Kc (carbon activity).  Using readily available technology, both Kn and Kc can be measured and controlled.   Sensor technology, along with automated programmable control, eliminates variability in process and provides repeatable quality results.

This session will cover the basic principles of controlling  Kn and Kc by utilizing and understanding  sensor and control technology.  Analysis of the input variables will be discussed as associated with nitriding and FNC applications.  Also, the effects of the gas ratios, temperature and time has on actual results will be discussed.  Review of processes using hydrogen sensors, CO/CO2 and oxygen probes will be provided.  Discussion of technical challenges and maintenance requirements for these sensors and processes.