Liquid nitriding is a subcritical surface enhancement process with one of the longest track records of success of any case hardening technology.
PVD coatings involve the deposition of thin (2-10 microns; 0.0001" – 0.0004") films on the surface of tools and components.
Only ferrous materials (materials whose major ingredient is the element iron), i.e. all steels, including stainless steels and cast irons, are considered candidates for Liquid Nitriding. However, other materials containing minor percentages of iron may also produce some benefit from Liquid Nitriding.
Liquid Nitriding is intended for use on ferrous materials only; that is, materials whose largest constituent is iron. But, if the material contains even a small amount of iron, some nitriding may occur – as is the case with some grades of high-nickel alloys such as Inconel 600.
Ferrous materials manufactured using a Powder Metallurgy (PM) processing route can be effectively treated by ARCOR® Liquid Nitriding, provided the density of the part the part is above a certain minimum threshold. For details, please contact TS USA.
Masking to prohibit nitriding in specific areas is technically possible using plating, or, certain masking compounds; however, this typically not done due to cost, and/or marginal effectiveness in the liquid bath environment.
Heat-treated parts are often Liquid Nitrided. However, if a reduction in the heat-treated hardness and strength is to be avoided, the temperature of the nitriding treatment must be set below that of the prior heat treatments.
No nitriding or nitrocarburizing process can nitride small holes and deep cavities with complete uniformity. However, Liquid Nitriding is by far the most capable of generating a uniform compound layer in these regions of a component.
Liquid Nitriding is used across a vast and diverse range of industries - the largest segment is the Automotive. Other prominent application industries/applications are: Oil & Gas; Firearms; Construction & Material Handling equipment; Power Generation; Hydraulic & Pneumatic equipment; Transportation and general industrial equipment. For more application details, please refer to the HEF USA web-site at: www.hefusa.net or contact TS USA.
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