| 摘要 |
PURPOSE:To prepare an article having high hardness and high wear resistance by dipping an article contg. Cr, V, etc., on its surface in a dipping bath contg. molten chloride contg. fluoride admixed with an oxide of boron and a boron- contg. alloy. CONSTITUTION:A dipping bath is prepd. by adding an oxide of boron and a boron-contg. alloy(ferroalloy, etc.,) to molten chloride contg. fluoride (KCl-BaCl2- NaF, etc.,). The amt. of the oxide of boron to be added is ca. 2-7% basing on the total weight of the bath, and the amt. of the boron-contg. alloy to be added is ca. 2-20%. The surface to be treated of an article contg. a metal selected from Cr, V, W, Mo, Zr, Hf, Nb, Ta, Ni, and alloy thereof, in the surface is dipped in the dipping bath prepd. by the above-described method. The dipping time and the dipping temp. are arranged to be ca. 700-1,000 deg.C for 1-several hour. By this method, superior surface film is obtd. by a convenient dipping treatment. |
