| 摘要 |
The present invention relates to a manufacturing method of steel including a multi-layered coating layer and more specifically, to a manufacturing method of steel including a multi-layered coating layer where a first CrN layer laminated on the surface of steel; a TiAlN layer laminated on the first CrN layer; and a second CrN layer laminated on the TiAlN layer and forming the outer surface of a multi-layered coating layer; are laminated in order. The steel according to the present invention is able to prevent damage to a film due to external impacts by including a high-hardness multi-layered coating layer; maintain excellent surface properties such as heat-resisting limit, friction coefficient, and corrosion resistance; simplify the production process and reduce the production cost, thereby improving the production efficiency; and secure reliable quality. |
