A kind of preparation method of metal multilayer board

Abstract

The embodiment of the invention relates to a preparation method of a multi-layer metal board. The method comprises the following steps: rolling a first multi-layer metal board to obtain a second multi-layer metal board, wherein the thickness ratio of each layer of the second multi-layer metal board is equal to that of each layer of the first multi-layer metal board; heating the second multi-layermetal board within preset time until an intermediate layer of the second multi-layer metal board is fully austenitized; and quenching the heated second multi-layer metal board until the intermediate phase layer of the second multi-layer metal board is subjected to phase change, and thus obtaining a third multi-layer metal board with high strength. Therefore, a new multi-layer board with high interface effecting area ratio can be obtained; the obtained product is high in strength and high in tensile plasticity on the premise that low production cost and corrosion resistance are kept; and moreover, the method is easy to realize missive industrial production.

Description

technical field [0001] The embodiments of the present invention relate to the field of metal composite materials, in particular to a method for preparing a metal multilayer board with high strength and certain plasticity. Background technique [0002] Low-carbon steel has the obvious advantage of low cost in industrial production, but it is not corrosion-resistant during application. In order to maintain a low production cost while improving its corrosion resistance during service, low-carbon steel is used as the base material to produce thinner 304SS layers on both sides and a low-carbon steel layer in the middle by hot rolling. Metal multilayer panels with a "sandwich" structure. [0003] Metal materials have two important mechanical properties, namely, yield strength and uniform tensile elongation (referred to as plasticity). A high yield strength allows the metal to bear a large load before plastic deformation occurs, and a large plasticity allows it to undergo a large...

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Problems solved by technology

The above-mentioned "sandwich" structure of the metal multilayer plate (304 SS (0.37mm) / Low C (2.60mm) / 304 SS (0.37mm)) has a low yield strength, and the low carbon steel in the middle can be quenched. Its yield strength is improved by the astenitic phase transformation, but the plasticity of the metal multi-layer plate after quenching is very poor. How to obtain greater plasticity while improving its yield strength through an effective technical means is a problem that the present invention aims to solve. The problem

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