A high-strength aluminum-coated strap and its production method

Abstract

The invention relates to a high-strength aluminum-plated strap which comprises the following components in percentage by weight: 0.10-0.20% of C, 0.50-1.20% of Mn, no more than 0.010% of Si, no more than 0.010% of P, no more than 0.010% of S, 0.020-0.050% of Ti, 0.020-0.050% of Nb, and 0.020-0.070% of Als. The production method comprises the steps of melting and performing continuous casting to form blanks, and heating the cast blanks; performing rough rolling; performing finish rolling; coiling; carrying out conventional acid pickling; performing cold rolling; performing conventional electrolytic degreasing; producing straps. The strap is 0.70mm thick, the tensile strength is not lower than 900MPa, the elongation rate is not lower than 10%, the number of repeated bending times is no less than 10 (R=5mm), and no layering and brittleness phenomena exist. A bright aluminum layer which is uniform and compact, is strong in adhesion force and is 3-5mu m thick is generated on the surface of the strap. Under acid and high-salt environments, no obvious rust exists in 360 days, so that the strap can completely meet the use requirement.

Description

technical field [0001] The invention relates to a strap and a production method thereof, in particular to a high-strength aluminized strap and a production method thereof, and is especially suitable for bundling and packaging of steel coils in a relatively high acidity or salinity environment. Background technique [0002] High-strength aluminum-plated strapping is a cold-rolled deep-processing product with broad market prospects. Because of its outstanding corrosion resistance, it is especially suitable for bundling and packaging of steel coils in environments with high acidity or salinity. [0003] The southeast coastal areas of our country are densely populated and economically developed. A large amount of industrial waste gas and automobile exhaust are discharged into the air, forming acid rain. At the same time, these areas have a marine climate, and the air has a high salinity. These factors lead to the iron and steel enterprises in the above-mentioned areas must impr...

AI Technical Summary

Problems solved by technology

Due to the low elongation of its products, there is a high possibility of breakage during packaging

In addition, the Si content in the raw material steel is relatively high, and the surface quality of the product is not good, which affects the adhesion of the zinc layer.

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