Patent ID: 8871036
Filing Date: 2014-10-28
Classification: B22F,C23C

Abstract:
1. A process for carburizing a metal article comprising: (1) heating the metal article to an elevated temperature, (2) coating the heated metal article with a graphite suspension to produce a graphite coated metal article, wherein the graphite suspension is comprised of graphite and an organic or inorganic liquid having a boiling point which is 50° F. to 200° F. less than the elevated temperature to which the metal article is heated, wherein the graphite suspension is void of hydrochloric acid, sodium silicate, resins, and xanthan gum, (3) heat treating the graphite coated metal article under a non-oxidizing environment at a temperature which is sufficient to promote the diffusion of carbon into the metal structure of the article to produce a carburized metal article, and (4) cooling the carburized metal article to ambient temperature.