STEEL STRIP COATED WITH METAL

摘要

PROBLEM TO BE SOLVED: To provide a hot-dipping method capable of reducing top dross on a strip.SOLUTION: A method for forming an Al-Zn-Si-Mg alloy coating on a strip comprises: unwinding a cold-rolled steel strip coil in an unwinding station 1; welding ends of a plurality of unwound strips by a welding machine 2 to form a long strip; continuously passing the strip through an accumulator 3, a strip cleaning part 4 and a furnace assembly 5; entering the heated strip into a coating pot 6 via the outlet; passing the strip downward through a molten bath including Al-Zn-Si-Mg alloy maintained in a molten state in the coating pot using a heating coil to coat the strip with the Al-Zn-Si-Mg alloy; passing the strip around a sink roll in the bath to extract it upward from the bath; and passing the strip through the bath to coat both surfaces of the strip with the Al-Zn-Si-Mg alloy.SELECTED DRAWING: Figure 1