Method of preventing surface of ultra-thin specification hot galvanized plate from being scratched

Abstract

The invention discloses a method of preventing a surface of an ultra-thin specification hot galvanized plate from being scratched. The method comprises the following steps: first, spraying a roll surface of a sink roll by means of a hypersonic flame spraying technique; then measuring roughness of the roll surface of the sprayed sink roll; then comparing the measured actual roughness with target roughness; if the actual roughness is smaller than the target roughness, roughening the roll surface of the sink roll continuously to guarantee that the roughness of the roll surface of the sprayed sinkroll is maintained at a relatively high level of the sink roll, so that the frictional torque of strip steel and the roll surface is increased, and the driving force of the sink roll is further increased, that is, the peripheral force of the sink roll is increased. After the peripheral force is increased, as far as the sink roll of same mass, a roller is easier to rotate, so that the rotating speed difference between the sink roll and the strip steel is reduced, and therefore, scratches caused by speed difference are reduced. The surface quality of the strip steel in a region of a galvanizingprocess section is guaranteed effectively, so that the through plate stability of a region section of a zinc pot is further improved effectively.

Description

technical field [0001] The invention relates to the technical field of hot-dip galvanizing, in particular to a method for preventing surface scratches of ultra-thin hot-dip galvanized sheets. Background technique [0002] With the sluggishness of the domestic iron and steel industry market, product structure adjustment, specification development and expansion, and quality and quality upgrading have become the main research directions of iron and steel enterprises. The Cold Rolling Department of Shougang Jingtang Company, as a practitioner of Shougang’s cold-rolled high-quality plate products, vigorously develops high-end, high-demand, high-yield high-end leading strategic products, and strives to realize the differentiation of production capacity optimization, cost reduction and quality improvement, and market expansion Development path. Ultra-thin products with a thickness of less than 0.35mm for hot-dip galvanizing units are mainly used in back panels, side panels and pan...

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the technical problem that the surface of ultra-thin hot-dip galvanized products will be scratched by sinking rollers in the prior art by providing a method for preventing the surface of ultra-thin hot-dip galvanized sheets from being scratched, and realizes the improvement of ultra-thin hot-dip galvanized sheets. Technical effects on surface quality of thin-gauge hot-dip galvanized products

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