Production method of light-metal composite plating steel strip for top-grade doors and windows

Abstract

The invention relates to a production method of a light-metal composite plating steel strip for top-grade doors and windows. The production method comprises a cold-rolling procedure and a strip manufacturing procedure, wherein the cold-rolling procedure comprises the following steps of using an ordinary Q215 hot rolled and acid pickled coil as a raw material, performing cold rolling, performing regular degreasing, and performing annealing. The strip manufacturing procedure comprises the following steps of performing uncoiling, performing stripping and removing burrs; and performing physical vapor deposition on metal Al, performing physical vapor deposition on Ti-Mg, performing chemical tinting, performing natural cooling to the room temperature after water scrubbing and stoving are completed, and performing coiling. According to the steel strip produced by the production method disclosed by the invention, the Rel is 480-530MPa; the elongation percentage is 39-43%; the strain hardening exponent n is 0.37-0.47; the plastic strain ratio r is 2.5-3.0; the surface hardness of the plating on the surface of the product is 58-62 HRC; the color of the surface of the plating is bright blue or bright green. After being repeatedly wiped for 10000 times, the changing rate of the hardness valve is less than or equal to 0.1%. According to a comparing test between the light-metal composite plating steel strip disclosed by the invention and a hot-dipped zinc ordinary plate based on routine, when the hot-dipped zinc ordinary plate is exposed for 5400 d under atmospheric environment, the light loss rate is less than or equal to 0.2%, the corrosion area is less than or equal to 0.5%, the surface performance is good and the corrosion resistance performance is good.

Description

technical field [0001] The invention relates to a production method of a steel strip, in particular to a production method of a light metal composite coated steel strip for high-grade doors and windows. Background technique [0002] In recent years, with the gradual increase of national income, people's requirements for home environment are also increasing. Therefore, a large number of high-end doors and windows have begun to be used in house decoration to enhance the cultural heritage and commercial value of houses. In the past, the production of high-grade doors and windows usually used light metal Al-Mg alloy as the main material, which has the advantages of light weight, strong corrosion resistance, high gloss, easy to paint, and moderate cost. However, Al-Mg alloys also have some disadvantages: low strength, poor wear resistance, and difficult to form. After long-term use, the zippers, frames, slides, shafts and other parts of the doors and windows are prone to perman...

AI Technical Summary

Problems solved by technology

However, Al-Mg alloys also have some disadvantages: low strength, poor wear resistance, difficult to form

Although the surface performance, electrical conductivity and thermal conductivity of the product are good, because the Au-Sn binary alloy is composed of many brittle and hard intermediate phases, the processing and forming performance and welding performance of the product are insufficient.

In addition, the coated steel strip uses the precious metal Au, which is more costly and expensive for the production of high-end doors and windows, and it cannot be popularized.

In addition, the coated steel strip has thin thickness, insufficient mechanical properties, and low hardness. Once used in doors and windows, it will be seriously deformed and collapsed after a short period of use.

Therefore, the coated steel strip has no possibility of application at all

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