Cold rolled tin-plated steel plate for multiple printing and painting and manufacturing method thereof

Abstract

The invention relates to a cold rolled tin-plated steel plate for multiple printing and painting and a manufacturing method thereof, and aims to solve the technical problems that in the prior art, the coating on the conventional cold rolled tin-plated steel plates for multiple printing and painting can be easily peeled off, the adhesive force between the coating and the steel plate is weak, and the color developing effect is bad after printing. The manufacturing method comprises the following steps: washing a hot-rolled hard tin-plated steel plate with a thickness of 1.8 to 2.3 mm by acid, performing continuous cold rolling, carrying out continuous annealing, flattening, electroplating tin on the steel plate, passivating the steel plate, and finally rolling the steel plate to obtain a finished product; wherein the cold rolling reduction ratio is 85 to 90%, the annealing temperature is 550 to 620 DEG C, the temperature is maintained for 60 to 120 seconds, the steel plate is flattened by two machines, the work roller of the first machine is an electro-discharge texturing roller with a Ra of 1.2 to 1.6 um, the rolling force is 500 to 700 t; the work roller of the second machine is a grinding roller with a Ra of 0.3 to 0.5 um, the rolling force is 250 to 350 t; the flattening elongation rate is 1 to 2%, and the passivation is carried out through an electrochemical method and a chemical method. The provided steel plate is mainly used to produce food/beverage cans, which have requirements on multi-color printing.

Description

technical field [0001] The invention relates to a cold-rolled tinned steel plate and a manufacturing method thereof, in particular to a cold-rolled tinned steel plate for multiple printing and a manufacturing method thereof, and belongs to the technical field of iron-based alloys. Background technique [0002] The tin layer of cold-rolled tin-plated steel sheet can provide surface properties such as beautiful metallic luster and good corrosion resistance, and can protect the iron substrate from corrosion under acidic conditions. At the same time, tin compounds are non-toxic and have no effect on the color, taste, and Nutritional value and no adverse effects on human health, so cold-rolled tinned steel sheets are widely used in food cans, beverage cans and other containers. Cold-rolled tinned steel sheets need to be printed many times before being made into food cans and beverage cans and bake. [0003] The manufacturing process of the three-piece can of cold-rolled tin-plat...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a cold-rolled tin-plated steel sheet for multiple printing and its manufacturing method, which solves the problem of poor adhesion an

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