Preparation method of low-cost non-vacuum metal layered composite material

Abstract

The invention discloses a method for preparing a low-cost non-vacuum metal layered composite material. By controlling the morphology and distribution of interface oxides, the interface bonding strength is improved, and the cost of blank making is reduced. Before forming a blank, the base material to be composited and Surface treatment of cladding materials, by controlling the surface roughness, a layer of uniform and dispersed free metal is formed on the surface to be compounded, so that the metal oxides formed during the heating process are uniform and dispersed; the base material and the cladding material are assembled, The four sides are sealed and welded, and an exhaust port is left at the end of the billet; the billet is heated, kept warm, and then hot-rolled and compounded, so that the compression ratio of the compound rolling process is not less than the minimum critical compression ratio, and the unit is reduced by virtue of the extension of the compound interface. The number of intermetallic inclusions on the area. The method has the advantages of low cost, good composite effect and stable quality.

Description

technical field [0001] The invention belongs to the field of metal material preparation, and in particular relates to a low-cost non-vacuum metal layered composite material preparation method. Background technique [0002] Heterogeneous metal layered composites are new layered composites that have both the performance and cost advantages of base materials and cladding materials, and are widely used in the fields of energy, transportation, marine, and aerospace. The hot-rolling composite method is the main method for preparing large-scale heterogeneous metal layered composite materials such as steel / stainless steel, titanium / steel, titanium / stainless steel, corrosion-resistant alloy / steel, etc. In order to avoid the oxidation reaction between the air and the metals between different metals during the hot rolling process, and form inclusions to reduce the bonding strength between the metals, Japan JFE first used the method of vacuum electron beam welding and hot rolling to pre...

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Problems solved by technology

Since vacuum electron beam welding requires the use of a huge vacuum chamber to reduce the vacuum between layered metals, the production cost is high, and the average cost of steel billets per ton is as high as 2,000 yuan / ton

[0003] In order to reduce the above-mentioned vacuum cost, some small and medium-sized enterprises adopt the brazing method to prepare heterogeneous metal composite materials. Although the vacuum cost is saved, the brazing material is still expensive and the product quality is unstable.

In addition, there are also enterprises that use non-vacuum billet assembly, and then use mechanical pump and molecular pump to vacuumize the billet to realize vacuum rolling, which reduces the preparation cost of layered metal composite materials, but the production efficiency is low. Unstable binding strength

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