Mechanical infiltration method for surface alloying of pure iron-based plate

Abstract

The invention relates to a mechanical infiltration method for surface alloying of a pure iron-based plate. The method comprises the following steps: realizing the method in an oscillatory type ball rolling machine; fixing the pure iron-based plate on the top of a ball rolling chamber, charging argon after vacuum-pumping, alloying the rolling ball by a bearing, and making nickel powder added in the ball rolling chamber mechanically infiltrated on the surface of the pure iron-based plate to form a iron-nickel alloying layer of which the depth is 0.12mm and the content of nickel is 60 percent; and annealing the alloying layer in a vacuum furnace at a high temperature to complete the further solid solution of the alloy. By the method, the strength, hardness, wear resistance and corrosion resistance of the surface of the pure iron-based plate are greatly improved, and the hardness reaches 1.2GPa; no new interface is generated between a substrate of the pure iron-based plate and the alloying layer, and no cracking and spalling phenomena occur; the metallurgical phase tissue of the alloying layer is good in compactness, and the crystal is thinned; moreover, the method has the advantages of less used equipment, simple process, no environmental pollution, good mechanical and physical performances of the pure iron-based plate after alloying the surface of the pure iron-based plate, and the application in various industrial fields, so that the method of the invention is a quite ideal mechanical infiltration method for the surface alloying of the pure iron-based plate.

Description

technical field [0001] The invention relates to a mechanical infiltration method for surface alloying of pure iron-based materials, which belongs to the technical field of alloy infiltration methods and applications on the surface of black metal pure-iron-based materials. Background technique [0002] Iron is one of the most important ferrous metals. Industrial pure iron is the one with the highest iron content among iron materials. The iron content is greater than 99.5%, the carbon content does not exceed 0.04%, and contains silicon, manganese, phosphorus, sulfur, A small amount of elements such as chromium, nickel, copper, aluminum, etc.; the crystal grains of pure iron are relatively large, the texture is particularly soft, its mechanical properties are low in hardness and strength, poor in wear resistance, and easy to damage, which greatly limits the application of pure iron, but Pure iron also has the advantages of stable chemical composition, high purity, good toughnes...

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Problems solved by technology

[0003] In order to improve and expand the application range and service life of iron and pure iron, hardening, strengthening, alloying or chemical heat treatment are carried out on the surface of iron or pure iron-based materials to improve the density, hardness, strength and toughness of the surface of pure iron-based materials ; There are many ways to improve the surface mechanical properties of pure iron-based materials, such as surface chemical metal infiltration method, surface alloying method, surface deposition modification method, etc., so that a compound layer is formed on the surface of pure iron-based materials, thereby improving surface properties; There are also laser surface alloying methods, electron beam alloying methods, ion implantation methods, etc., but most of them have complex processes, expensive equipment, low production efficiency, and industrial applications are limited. Therefore, the development of simple and feasible surface alloying methods is a very important research topic

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