Importance

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Abstract

The present invention provides a method for enhancing adhesion of low-temperature ceramic coating in which a ceramic film with high adhesion strength can be formed on a metal product with the low-temperature ceramic coating. The method comprises: a blasting step comprising mixing substantially spherical shot having three or more approximate but different particle sizes, the shot having hardness equal to or higher than hardness of a base material of the metal product, and intermittently ejecting the shot with compressed air onto the metal product; a smoothing step comprising polishing a surface to be treated of the metal product to form smooth portions; and a low-temperature ceramic coating step comprising forming the ceramic film on the surface of the metal product at equal to or lower than tempering temperature of the base material, wherein the blasting and smoothing steps are carried out before the low-temperature ceramic coating step.

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First Claim