A kind of preparation method of high wear-resistant iron-based composite material

Abstract

The present invention relates to an iron-based composite material, AND specifically relates to a high wear-resistant iron-based composite material preparation method. Ceramic thin rods are closely arranged in a radial direction to form small units in a certain shape, both ends of the units are respectively tied by aluminum wires, the small units comprising the ceramic thin rods are closely arranged into a desired shape, the ceramic thin rods are perpendicular to a to-be-worn surface, the aluminum wires for tying of adjacent units are connected together by welding, so that ceramic thin rod preformed bodies are obtained; the ceramic thin rod surface is pretreated with an aqueous solution of potassium fluorozirconate, and dried; and before pouring, the pretreated ceramic thin rod preformed bodies are fixed on the position on the inner surface of the cavity, which needs to strengthen, then a mould is assembled, molten iron or steel is poured, the shedding possibility of a reinforcing phase in the wearing process can be reduced effectively.

Description

technical field [0001] The invention relates to iron-based composite materials, in particular to a method for preparing high wear-resistant iron-based composite materials using fine ceramic columns as reinforcement materials. Background technique [0002] Wear-resistant parts such as grinding rollers, liners, and blow bars are widely used in cement, electric power and other industries. Under harsh wear conditions such as high-hard abrasives and high impact, the currently used high-chromium castings fail quickly, and it is urgent to use them. Iron-based surface composite materials with better wear resistance. One of the most suitable processes for preparing iron-based surface composite materials is the melt infiltration method. Patent CN102310183A discloses a high-wear-resistant iron-based composite material and its preparation method. This method uses large-size fused zirconium corundum particles to prepare particle-reinforced iron-based composite materials through melt infi...

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Problems solved by technology

[0002] Wear-resistant parts such as grinding rollers, liners, and blow bars are widely used in cement, electric power and other industries. Under harsh wear conditions such as high-hard abrasives and high impact, the currently used high-chromium castings fail quickly, and it is urgent to use them. Iron-based surface composite materials with better wear resistance. One of the most suitable processes for preparing iron-based surface composite materials is the melt infiltration method. Patent CN102310183A discloses a high-wear-resistant iron-based composite material and its preparation method. This method uses large-size fused zirconium corundum particles to prepare particle-reinforced iron-based composite materials through melt infiltration technology. The process is simple, and the thickness of the composite layer can be adjusted in a wide range; (ZrO 2 Toughened Al 2 o 3 ) ceramic particles were made into a honeycomb porous ceramic prefabricated body, and then poured with high-chromium cast iron, and the high-chromium cast iron matrix composite was successfully prepared by casting infiltration technology (Casting, 2012, 61(2): 165.); However, the above method obtained The iron-based composite material is prone to the problem of ceramic particles falling off during the wear process, which affects the improvement of the wear resistance of the composite material; On the premise of effective effect and convenient preparation, it can effectively avoid the shedding of the reinforcing material during the wear process; the patent CN101623752A discloses a preparation process of a wear-resistant ceramic rod directional reinforcement steel or iron-based casting composite material, and the wear-resistant ceramic rod is 5 The spacing of ~10mm is arranged perpendicular to the wear surface and fixed in the mold, poured into the matrix metal liquid, and after solidification, a composite material wear-resistant casting is obtained, but the volume fraction of ceramic rods in the composite material obtained by this patent is low, and the arrangement of ceramic rods is troublesome. Interfacial bonding between ceramic rods and steel or iron substrates is difficult to ensure

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