Method of improving surface wear qualities of metal components

Metal treatment – Compositions – Heat treating

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148 166, C21D 174

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047938714

ABSTRACT:
A method is disclosed for subjecting a steel component made of a non-alloy or fine grained steel to a hardening treatment. An epsilon iron nitride surface layer of high surface area resistance is formed on the steel component by gas nitriding or nitrocarburizing and includes the preliminary step of heating the component to the nitriding temperature in an atmosphere which is inert to the metal of the component.

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Dawes et al, "Nitriding Non-Alloy Steel Components", Heat Treatment Metals, 1980.1, pp. 1 through 4.

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