Patent ID: 7617583
Filing Date: 2009-11-17
Classification: C21D,C23C,Y10T

Abstract:
1. A method for producing a hot-dip plated metal strip comprising the steps of: annealing a metal strip; imparting a surface plastic strain to the metal strip using plural rolls, by bending; drawing the metal strip into a molten metal bath for plating; turning around the metal strip upward with adhered molten metal on the metal strip, and then drawing up the metal strip out of the molten metal bath without contacting the metal strip with a roll in the molten metal bath; and controlling a coating weight of the molten metal adhered on the metal strip using a wiper; wherein the step of imparting surface plastic strain comprises imparting the surface plastic strain such that an amount of surface residual plastic strain is 0.1% or more which remains on a surface of the metal strip at a point when the metal strip arrives at a sink roll.