| 摘要 |
PROBLEM TO BE SOLVED: To provide a member for a vehicle using a steel plate which is easily manufactured by die rolling and makes sticking fingerprints and stains hardly conspicuous.SOLUTION: A steel plate is given a surface shape, which is a rugged shape having recessed parts formed through one-pass light rolling so that the steel plate to be rolled may not be reduced in plate thickness using a die roll given an arithmetic average roughness Ra of 4.0-9.0 μm and also having undeformed flat parts except the recessed parts left as projection parts, such that the ruggedness has an arithmetic average roughness Ra of 3.0-8.5 μm and a mean interval Sm of 150-600 μm and the flat parts (projection parts) have an area rate of 25-60%. A component in a desired shape is formed using the steel plate as a raw material and used as desired member for a vehicle. As the steel plate in use, a stainless steel plate and a plated steel plate with superior corrosion resistance are preferred. |
