Surface hardening method of cobalt-chromium-tungsten main alloy

摘要

The present invention relates to a method of hardening the surface of a cobalt-chromium-tungsten-based main alloy, and its object is to form a surface hardened layer by using a plasma of a DC pulse control method, so that there is no distortion of the material, and environmental problems It is an object of the present invention to provide a surface hardening method of a Co-Cr-W based main alloy in which a surface hardening layer having a uniform thickness can be obtained even in a complicated shape.;The present invention for achieving the above object in the method for curing the surface of the Co-Cr-W-based main alloy, using a pulse-controlled direct current, the treatment temperature is set to 550 ~ 700 ℃, the treatment gas 100% N ₂ gas and the H ₂ or by a gas containing N ₂ gas of 75% or less of the surface hardening method of the Co-Cr-W-based cast alloy, characterized in that to perform a plasma nitriding treatment in the invention.