Low-cost and high-efficiency preparation method of steel/magnesium laminar composite plate strip

Abstract

The invention discloses a low-cost and high-efficiency preparation method of a steel/magnesium laminar composite plate strip, and belongs to the technical field of metal laminar composite material preparation. The method comprises the following steps of firstly, softening and annealing steel and magnesium plate strip blanks, mechanically grinding the surfaces to be compounded of the steel and magnesium plate strip blanks, carrying out steel/magnesium laminated assembly, heating at 150 DEG C-300 DEG C, carrying out pre-rolling compounding to obtain a steel/magnesium pre-compounded plate strip, carrying out stress relief annealing, mechanically grinding the surfaces to be compounded of the steel/magnesium pre-compounded plate strip and the magnesium plate strip blank, carrying out (steel/magnesium)/magnesium laminated assembly, heating at 310 DEG C-400 DEG C, carrying out final rolling compounding to obtain the steel/magnesium final composite plate strip, and finally, carrying out diffusion annealing to obtain the steel/magnesium laminar composite plate strip. According to the technical scheme, high-strength metallurgical bonding between magnesium and steel can be achieved, and the method is particularly suitable for preparing the steel/magnesium laminar composite plate strip with the large size and the large coil weight, and the magnesium layer of the steel/magnesium laminar composite plate strip is far thicker than the steel layer.

Description

technical field [0001] The invention belongs to the technical field of metal layered composite material preparation, and specifically relates to a low-cost and high-efficiency preparation method for steel / magnesium layered composite plate strips, which is especially suitable for preparing large-size and heavy coils with thick magnesium layers or far-reaching magnesium layers. Steel / magnesium laminated clad plate strip or steel / magnesium / steel laminated clad plate strip thicker than the steel layer. Background technique [0002] Steel / magnesium (including steel / magnesium / steel) layered composite plate strip has the advantages of low cost and excellent mechanical properties of steel and low density and high damping performance of magnesium. It is a low-cost lightweight, High-strength, vibration-absorbing structure-function integrated new materials have broad application prospects in the fields of automobiles, ships, rail transit, aerospace, and national defense. In the servic...

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Problems solved by technology

However, both aluminum or zinc can react with iron and magnesium to form intermetallic compounds, resulting in low interfacial bonding strength of the composite plate

In addition, this method also has the following disadvantages: (1) it is necessary to heat the magnesium / steel composite blank under vacuum or inert gas atmosphere conditions, the preparation process is long, and the equipment requirements are high, which increases the production cost of the composite plate; ( 2) The size of the vacuum heat treatment equipment limits the width and length of the composite plate, it is difficult to realize continuous production in the true sense, and it is also impossible to prepare large-size and heavy coils with thick magnesium layers (or the magnesium layer is much thicker than the steel layer) ) steel / magnesium layered composite plate strip

However, this method needs to vacuum-pack the blanks with a metal sheath before hot-rolling and cladding, which limits the width and length of the steel / magnesium layered clad strips that can be produced, making it difficult to prepare large-size and heavy-weight rolls. Steel / magnesium layered composite plate strip with thicker magnesium layer (or much thicker magnesium layer than steel layer)

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