Method for preparing lightweight special-shaped steel by sandwich sintering method

Abstract

The invention provides a method for preparing lightweight special-shaped steel by a sandwich sintering method. The method comprises the following steps that prepared special-shaped steel powder, a binding agent, a pore-forming agent and a steel plate serving as the middle layer are adopted for rolling and forming, then drying and removing the drying agent, sintering and forming by adopting an electromagnetic field sintering method, and then the pore-forming agent is dissolved in the water solution so as to obtain a required foam steel. According to the method, the steel plate is adopted as themiddle layer of the sandwich rolling method so that the overall strength and toughness of the foam steel product can be remarkably improved; the strength of the foam steel finished product can be remarkably improved by applying rare earth elements such as Ce in the powder; in the sintering process, an additional magnetic field and an electric field are applied so that the diffusion effect of theelements in the powder can be remarkably improved, the density of the foam steel can be increased, strength is improved, and therefore the light-weight special-shaped steel with excellent mechanical properties is obtained; the method has the advantages of being simple to operate, low in cost, capable of continuously preparing the light special-shaped steel, high in yield and capable of preparing the light special-shaped steel with the excellent mechanical properties. The invention belongs to the field of metallurgy technology and material science.

Description

technical field [0001] The invention relates to a method for preparing lightweight special-shaped steel. It belongs to the field of metallurgical technology and material science. Background technique [0002] Special-shaped steel is widely used in construction, tunnels, bridges and other fields, and the market application prospect is very good. At present, the special-shaped steel used in the fields of construction, tunnels, bridges, etc. is all made of solid steel materials. However, the high density of steel itself makes it relatively heavy, which significantly reduces its load. Foam steel is a new type of material integrating structure and function. It has many characteristics such as low density, good permeability, large specific surface area, high mechanical strength, and excellent impact energy absorption efficiency, making foam steel ideal for manufacturing lightweight bearings, Ideal material for filter elements, energy-absorbing shock absorbers, etc., and is ther...

AI Technical Summary

Problems solved by technology

At present, the foamed steel obtained by traditional preparation methods such as solution foaming, sintering, electroplating, etc. often has defects such as low strength, high cost, and non-continuous production, which limit the wide application of foamed steel.

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