Nitrider Calculation (Available on Units Configured for Nitriding & FNC Applications)
When configured for nitriding and ferritic nitrocarburizing (FNC) applications, the PGA 3510 has the ability to provide a calculation of values essential those processes—specifically, nitriding potential (KN) and carburizing potential (KC). To access these values, open the Nitrider Calculation page. NOTE: If the PGA 3510 unit you are using does not have the Nitrider Calculation option, and you would like this feature added, please contact SSi at (513) 772-0060.
The Nitrider Calculation page displays data on current atmosphere parameters such as temperature and measured values for % CO, % CO2, % CH4, % O2, and % H2 (if the H2 sensor is installed). The calculated value for %C is also shown.
User-provided flow values for N2, NH3, DA, and CO2 are used by the PGA 3510 in performing calculations. The flow values are visible on the right side of the Nitrider Calculation page. To change a flow value, simply tap on the blue field for that value. A numeric entry page will appear, allowing you to change the value. For the purpose of KN and KC calculations, any valid gas flow unit (for example, cubic feet per minute, or cfm) may be used. The flow unit must be the same for all gases. NOTE: If one or more of the flow gases do not show up in the list, it is likely that the gas flow valve is not enabled in the Tools → Valve Setup menu. Refer to the Valve Setup section for more information.
KN provides a measurement of the amount of nitrogen that can be diffused into a metal (e.g., iron); it is a derived measurement based on the partial pressures of NH3 and H2. The PGA 3510 performs the calculation of KN using user-provided flow values and displays the calculated KN value on the Nitrider Calculation page.
KC provides a measurement of the amount of carbon that can be diffused into a metal; it is derived from a calculation involving the partial pressures of CO2, H2, CO, and H20. The PGA 3510 performs the required calculation using user-provided flow values and displays the calculated KC value on the Nitrider Calculation page.
NOTE: Calculation of KC may have inaccuracies in the presence of ammonia.