HOT ROLLING METHOD OF DOUBLE-LAYERED CLAD MATERIAL

PURPOSE:To hot roll a double-layered clad material after preventing the front end of a rolling material from causing camber by hot rolling the double-layered clad material in a state of joining a single metallic piece to the front end of material. CONSTITUTION:A single metallic piece 2 is welded and joined to the front end of a double-layered clad material 1. In case of hot rolling the material 1; the piece 2 after passing the upper and lower rolls 5a, 5b of the 1st stand 4, is bitten the upper and lower rolls 7a, 7b of the 2nd stand 6 without causing any troubles in biting due to the generating of a front-end camber. As a result, when the material 1 is rolled by the rolls 5a, 5b of stand 4 while applying a tension to it between the 1st and 2nd stands 4 and 5, the neutral points are moved. That is, the neutral points a1, b1 are symmetrically positioned in case of the piece 2 at the front end, but the neutral points a2, b2 and a3, b3 are moved to the nonsymmetrical positions in accordance with the constituent materials in case of the clad material 1; then the material is rolled in a stable condition, and the camber is not produced at the front end of material.