SURFACE TREATMENT OF CEMENTED CARBIDE ARTICLE

摘要

A method for forming a carbide layer of a IV-b group element of the periodic table on the surface of a cemented carbide article in a treating molten bath, comprising preparing a treating molten bath composed of molten boric acid or borate and a IV-b group element dissolved therein and immersing the article in the treating molten bath to deposit the IV-b group element on the surface of the article and to form a carbide layer of the IV-b group element on the surface of the article with the carbon contained in the article. The method of this invention can form easily a smooth and hard carbide layer on the surface of the article. And the formed layer improves greatly the hardness and wear resistance of the cemented carbide article.