MANUFACTURING METHOD OF A COMPOSITE ROLL OF CEMENTED CARBIDE FOR ROLLING CAPABLE OF PERFORMING A MORE RIGID AND SPREADING BONDING OF AN OUTER LAYER PART WITH A BONDING LAYER

摘要

PURPOSE: A manufacturing method of a composite roll of cemented carbide for rolling is provided to manufacture a composite roll of cemented carbide for rolling with strength strong against heat crack and damage, and to improve the rolling productivity.;CONSTITUTION: A manufacturing method of a composite roll of cemented carbide for a rolling comprises the followings of: the step(S110) of preparing cemented carbide powder, the step of(S120) of forming a hollow sleeve molding of an outer layer of cemented carbide with the cemented carbide powder, the step(S130) of forming a hollow sleeve body of the outer layer of cemented carbide by sintering the hollow sleeve molding of the outer layer of cemented carbide, the step(S200) forming the composite sleeve by inserting an steel inner layer hollow sleeve into the inner bore of the hollow sleeve body of the outer layer of cemented carbide, the step of coating(S300) an mold releasing agent on the outer surface of the steel inner layer hollow sleeve or the inner surface of the hollow sleeve body of the outer layer of cemented carbide and inserting the composite sleeve into the inner bore of a cylindrical steel jig to form a cylindrical triple composition, the step(400) of heating the composite slab and the cylindrical triple combination of the cylindrical steel jig in a vacuum furnace to perform the spread bonding on a bonding layer including the interface of the outer layer hollow sleeve sinister of the cemented carbide and the steel inner layer hollow sleeve, and the step(S500) of separating the composite role of cemented carbide for rolling from the cylindrical combination by breaking away the cylindrical steel jig.;COPYRIGHT KIPO 2013;[Reference numerals] (AA) Start; (BB) End; (S110) Preparing cemented carbide powder; (S120) Molding a hollow outer layer sleeve molding of cemented carbide; (S130) Forming a hollow sintered outer layer sleeve body of the cemented carbide by sintering the hollow sleeve molding; (S150) Preparing an iron-based hollow inner layer sleeve; (S200) Forming a composite sleeve by inserting the hollow inner layer sleeve to the interior of the hollow sintered outer layer sleeve body; (S300) Coating a mold releasing agent and inserting the composite sleeve to the interior of a cylindrical steel jig to form a cylindrical triple composite body; (S400) Heating the cylindrical triple composite body in a vacuum furnace to perform spread bonding on the interface of the hollow sintered outer layer sleeve and the hollow inner layer sleeve; (S500) Removing the cylindrical steel jig from the triple composite body and separating a composite roll