A high-strength aluminum-clad strip and its production method

Abstract

The invention discloses a high-strength aluminum-coated plate strip and a production method thereof. The high-strength aluminum-coated plate strip is of a structure composited by an aluminum strip anda steel strip. The steel strip comprises the chemical components of, by weight, 0.03%-0.06% of C, larger than 0% and smaller than or equal to 0.005% of Si, 0.4%-0.8% of Mn, no more than 0.015% of P,no more than 0.005% of S, no more than 0.005% of Al, 0.0062%-0.02% of N, 0.006%-0.05% of O, 0.002%-0.004% of Ca, 0.01%-0.03% of Ti and the balance Fe and inevitable impurities; and meanwhile, the sumof the contents of O and N is larger than or equal to 0.013%, and the relation of 0.5<=(O+N) / (P+S)<=5 is met. The aluminum-coated plate strip has high strength of steel; as for the aluminum-coated plate strip, the yield strength is 280-400 MPa, the tensile strength is 420 MPa or above, and the elongation rate is larger than 28%; and meanwhile the aluminum-coated plate strip has the characteristicsof good properties of plasticity, cold-bending, stamping and the like, corrosion resistance of aluminum, heat dissipation and attractiveness and can be used for production of heat dissipation devices, heat dissipation pieces, wheels and corrosion resistant boxes.

Description

technical field [0001] The invention relates to a high-strength aluminum-clad strip and a production method thereof. The aluminum-clad strip not only has the strength of steel, but also has a good heat dissipation effect, excellent cold stamping performance and corrosion resistance, and can be used for high-strength wheels, heat dissipation Production of device components and corrosion-resistant boxes. Background technique [0002] With the development of technology and economy, the performance requirements of metal materials are getting higher and higher, and it is often difficult for a single composition of metal materials to meet the performance requirements of multiple aspects in the actual use process at the same time. Selecting two or more metal materials and using various processes to make composite panels can meet special comprehensive performance requirements. Aluminum-clad steel is a composite strip with aluminum on the surface and steel on the core layer by rolli...

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Problems solved by technology

Chinese Patent No. CN104451401A discloses "a wheel steel for wheels and its preparation method", which is a steel plate for wheels with different strength levels, but it does not solve the heat dissipation problem of the wheels

Chinese Patent Publication No. CN101748853A discloses "a kind of aluminum-steel / aluminum-steel-aluminum composite metal sheet and its manufacturing method", which uses adhesives to realize the composite of steel and aluminum, and the composite strength is low

[0006] Chinese Patent Publication No. CN102019727 discloses "aluminum-coated steel strip for cooler and its preparation method, steel strip and aluminum alloy strip used therein", which mainly relates to aluminum-coated steel strip for heat dissipation and substrate used therein, but the strength is relatively high. Low, cannot be used for the production of structural parts that bear a certain load

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