Salt Bath Nitriding
Melonite QPQ Process The Melonite QPQ process is a multi step process that provides a very uniform consistent nitride layer on your components. The first step of the process is a preheat to raise the components surface temperature to about 700 - 800°F in air. The product is then transferred to the MEL 1/TF1 tank containing the liquid Melonite salt to begin the Nitrocarburizing process. The salt melt mainly consists of alkali cyanate and alkali carbonate. It is operated in a pot made from special material, and the pot is fitted with an aeration device. The active constituent in the MEL 1 / TF 1 bath is the alkali cyanate. The Nitrocarburizing process step is conducted in the MEL 1 / TF 1 bath at 896-1166°F, the standard temperature is usually 1076°F.
This complete process sequence is shown above and is in fact the QPQ®-process. QPQ® comprises MELONITE®-treatment with mechanical processing and oxidative post treatment in a salt melt.
NCT’s Melonite QPQ line is one of the cleanest most advanced lines in the United States. We continue to adhere to our commitment to offering our customers advanced surface treatments with the most up to date technology available. NCT’s production Melonite line is capable of processing large production lots or small individual lots. Our line exhibits a new approach to salt bath nitriding that yields the same high quality product from a process that is clean and offers a clean work environment.