| 摘要 |
PURPOSE:To improve the adhesive property of a hard film of a WC-Co system to the base material of the cold rolling roll on which a high load and high face pressure are applied by providing specific relations among the film thickness and Shore hardness of the above-mentioned hard film and the Shore hardness of the base metal of the roll at the time of forming the hard film having excellent wear resistance on the surface of the roll. CONSTITUTION:The hard film of the WC-Co system is formed on the surface of the roll for cold rolling of steel products, etc., in such a manner as to satisfy the relations expressed by equation among the thickness thetamum of the hard film of the WC-Co system, the Shore hardness HS1 of the film and the Shore hardness HS2 of the base material of the rolling roll in order to prevent the peeling of the hard film of the WC-Co system during the operation at the time of forming the hard film of the WC-Co system on the surface of the rolling roll by an explosive thermal spraying, etc., to improve the wear resistance of the roll. The adhesive property of the hard film to the base material of the roll is thereby improved and the service life of the cold rolling roll is prolonged. |
