The present invention, it is easy to productivity is excellent, and the side surface state and flatness of the control member of the damper, providing a hard clad material production method and equipment to generate adhesion failure. The core material, and in one surface or how a combined superimposed on both sides or a clad material produced comprising a plurality of cheukjae of the core, in the core material preparation step was dissolved simjaeyong metal, molded the simjaeyong in simjaeyong ingot, and cheukjae preparation step produced by metal component and has a composition of the ingot side damper clad material preparation step of preparing each prepared by dissolving the other side of re-dissolving the metal, the cast; Stacking process for preparing a material as said stacking cheukjae the ingot side damper on one side or both sides of the ingot together simjaeyong superimposed in a predetermined arrangement; And a cladding hot rolling step for producing a clad material by hot rolling the re-stacking.