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,calciumhexaboride, borax or mixtures thereof;b. 45.5 to 88.5 wt% of a diluent selected from SiC, alumina or mixturesthereof;c. 1.0 to 20.0 wt% of an activator selected from KBF4, ammonia chloride,cryolite ormixtures thereof; andd. 10.0 to 30.0 wt% of a sintering reduction agent selected from carbonblack,graphite or mixtures thereof.