1.national energy-saving 2.electric furnace 3.auto control system Fuction Car-bottom furnace is the national energy-saving cycle homework electric furnace (30% energy),Car-bottom furnace adopts microcomputer auto control system, can control temperature exactly. It mainly used to do quenching, tempering and other heat treatment of hi-Cr castings, cast iron, roller, steel ball, 45 steel, stainless ...