Method for preparing steel-aluminum composite plate by using electromagnetic induction heating and rolling process

Abstract

The invention discloses a method for preparing a steel-aluminum composite board through an electromagnetic induction heating and rolling process. The method for preparing the steel-aluminum compositeboard through the electromagnetic induction heating and rolling process comprises the steps of S1, surface pre-treatment of a board; S2, blank assembling and fixing, specifically, after a steel plateand an aluminum plate are stacked, a gasket is placed between the steel plate and the aluminum plate to reserve a gap, and the steel plate and the aluminum plate are fixed with rivets; S3, induction heating of an assembled blank, specifically, the temperature of the steel plate can be rapidly increased to 750-1000 DEG C under the effect of vortex heating of a ferromagnetic material, the temperature of the aluminum plate is increased to 100-300 DEG C, and thus, a temperature difference over 500 DEG C is generated between the steel plate and the aluminum plate; S4, rolling, specifically, the heated blank is conveyed into a rolling machine; and S5, annealing and straightening. According to the method for preparing the steel-aluminum composite board through an electromagnetic induction heatingand rolling process, the requirement for the capacity of the rolling machine is greatly lowered, the deformation rate of a steel-aluminum rolling composite critical surface is greatly decreased, andcooperative deformation of steel and aluminum is achieved; and the obtained steel-aluminum composite board has good bending resistance and high bonding performance, the work hardening of the steel-aluminum composite board is greatly reduced, and the subsequent machinability is improved.

Description

technical field [0001] The invention belongs to the technical field of metal layered composite board preparation, and in particular relates to a method for preparing a high-performance steel-aluminum composite board by heating and rolling using electromagnetic induction technology. Background technique [0002] With the rapid development of science and technology and modern industry, it is difficult for a single component material to meet the increasing requirements for the comprehensive performance of materials. New composite materials that integrate the physical and chemical properties of different materials have emerged as the times require. As a new type of composite material, the metal layered composite material is a metal composite plate prepared by metallurgical combination of two or more metals with different properties through various composite technologies, which can obtain advantages that a single metal does not have Mechanical, physical and chemical properties. ...

AI Technical Summary

Problems solved by technology

However, in the composite process of cold rolling, the effective combination of steel and aluminum requires a reduction rate of more than 50% in the first pass. Such a huge single deformation often exceeds the bearing capacity of ordinary rolling mills. The wider the plate, the thinner the thickness , the greater the rolling load, the more difficult it is to combine cold rolling

Steel-aluminum hot rolling is generally carried out at 400°C-550°C, but the deformation of steel is very small, basically no change relative to the deformation of aluminum, and the bonding strength of the obtained composite plate is low

Regardless of whether the steel-aluminum composite plate is prepared under the cold rolling process or the hot rolling process, since the melting point of the aluminum material is lower than the recrystallization temperature of the steel material, the work hardening produced by the steel material in the large deformation rolling process is difficult to eliminate through later annealing , which directly affects the reprocessing performance of the steel-aluminum composite panel

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