A light-weight design aluminum-clad substrate and its production method

Abstract

The invention discloses a lightweight designed aluminum-coated base plate and a production method thereof. The components of the aluminum-coated base plate comprise, by weight, 0.04-0.08% of C, greater than zero and no more than 0.005% of Si, 0.9-1.8% 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, 0.05-0.06% of O, 0.002-0.004 of Ca, 0.01-0.03% of Ti, 0.01-0.03% of Nb, and the balance Fe and unavoidable impurities; and meanwhile the conditions that O+N is greater than or equal to 0.013%, and (O+N) / (P+S) is greater than or equal to 0.5 and less than or equal to 5 are met. The yield strength of the aluminum-coated base plate is 400 MPa or above, the tensile strength is 500-800 MPa, meanwhile, the elongation rate A50% is 18% or above, and the plasticity is excellent. The aluminum-coated base plate is mainly used for production of aluminum-coated plate strips and can be used for manufacturing automobile wheels and heat dissipation elements, corrosion-resistant boxes and the like, and lightweight design is achieved.

Description

technical field [0001] The invention relates to a light-weight designed aluminum-clad substrate and its production method, which can be used in the production of high-strength aluminum-clad strips, used to manufacture wheels, heat dissipation devices, corrosion-resistant boxes, etc., to achieve lightweight design, and belongs to the manufacture of low-alloy steel field. Background technique [0002] The wheel is one of the important parts of the car body. It bears periodic tension and compression loads during service. At the same time, the steel plate undergoes welding, stamping and other processing procedures during the production and processing of the wheel. Therefore, steel for wheels requires good welding, fatigue and cold working properties. Prior to the present invention, multiple patents have been declared for wheel steel and its manufacturing method at home and abroad. In view of the strict requirements on the composition and inclusions of steel for wheels, Chinese...

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Problems solved by technology

[0005] In addition, the "Aluminum-coated steel strip for cooler and its preparation method and the steel strip and aluminum alloy strip" disclosed in Chinese Patent Publication No. CN102019727A introduces the aluminum-coated steel strip used for the cooling fin of the cooler, the substrate and the aluminum film used composition, but the steel strip involved has relatively high Si and Al composition, and does not involve O and N composition, mainly focusing on aluminum-clad steel strip

[0006] Chinese Patent Publication No. CN101736194A discloses "a wheel steel and its preparation method and wheel", the wheel produced by this method still has the problem of poor heat dissipation

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