BORONIZING POWDER COMPOSITIONS FOR IMPROVED BORIDE LAYER QUALITY IN OIL COUNTRY TUBULAR GOODS AND OTHER METAL ARTICLES

摘要

A powder boronizing composition comprising:a. 0.5 to 4.5 wt % of a boron source selected from B₄C, amorphous boron, calcium hexaboride, borax or mixtures thereof;b. 45.5 to 88.5 wt % of a diluent selected from SiC, alumina or mixtures thereof;c. 1.0 to 20.0 wt % of an activator selected from KBF₄, ammonia chloride, cryolite or mixtures thereof; andd. 10.0 to 30.0 wt % of a sintering reduction agent selected from carbon black, graphite or mixtures thereof.