Method for coating of transport rail of billet with ceramic lubricant in induction furnace

摘要

The present invention is stainless steel or ceramic lubricants which when moving the steel tube billet for the special steel successively to heat treatment in a high frequency induction furnace to minimize friction between the contact surfaces that are billet sliding possible to prevent surface defects of the billet relates to a rail transfer coating method of the billet for steel pipes using,; That is, according to the billet along the steel rail to the refractory of a high-frequency induction in the heat treatment process for producing a steel pipe of thereby continuously transferred to, SiO₂ powder with a coating for imparting lubricity to the contact surface of the steel rail and the billet 40 Al ₂ O₃ component of about _{-80% 5-20%, B 2 O} 3 component 1-20%, CaO 3-25% of component mixing, and the oxygen pressure 20-30psi the mixed powder and acetylene 5-20psi of the rail under the spraying conditions, but heating to 1,000-1,200 ℃ coated with the coating thickness is about 2-3mm, and, heating to 20-30 hours and melted at about 1,200 ℃ the temperature of the coating material on the run.