MOLTEN SALT (NT-1) BATH NITROCARBURIZING
Salt bath nitrocarburizing is used for decades in a wide range of industries. It is used to improve wear resistance and fatique strength of cast iron, sintered iron and steel. In combination with oxidation bath it improves corrosion resistance and reduces surface roughness.
Nitrocarburizing is an alternative to case hardening, chrome plating and many other coating processes. It is also an alternative to plasma or gas nitrocarburizing with equally good or improved quality and a better economy.
Because of low processing temperature (just below 600oC ) it has the advantage of inducing little shape distortion during the hardening process.
Molten Salt Bath Process Using NT-1 Salt:
Our company’s production NT-1 is the base salt for the nitrocarburizing molten salt baths. NT-1 is in molten state at operating temperature of 580oC . It is generally melted in titanium or some other special pots.
The reactive components in NT-1 are alkali cyanates and during nitrocarburizing operation they are converted to carbonates with little changes in the overall composition of the bath. The amount of cyanates is kept stable in certain limits by a polymer regenerator; NT-Reg. Usage of NT-Reg converts the carbonates to cyanates without any volume change in the pot.