| 摘要 |
PURPOSE:To develop a high-damping composite steel sheet excellent in press workability as well as rust-preventing property and causing no blister at baking finish by phosphating both sides of steel sheets, removing water of crystallization, putting a viscoelastic substance between the two of the above steel sheets and then carrying out cladding. CONSTITUTION:Phosphating films are formed on the surfaces of galvanized sheets, hot-rolled steel plates, cold-rolled steel sheets, etc., of 0.2-1.6mm thick by >=0.5g/m<2> plating quantity per one side. These steel sheets are heated to 160-220 deg.C to remove water of crystallization in the phosphating films. Then, between the two of the above surface-treated steel sheets, the viscoelastic substance such as ethyleneacrylic acid copolymer resin, modified polyethylene resin, modified polypropylene resin, vinyl acetate resin, etc., is provided as vibration-damping material in 0.03-0.6mm thickness, which is subjected to forced cladding to form the high-damping composite steel sheet having superior characteristics. |
