Steel-based composite and preparation method and preparation device thereof

Abstract

The invention relates to a steel-based composite and a preparation method and a preparation device thereof, and belongs to the technical field of steel-based composites. The steel-based composite comprises a steel base and reinforced composite columns parallelly arranged in the steel base, and is prepared by processes of pressing, sintering, pouring, condensing and the like. The preparation device of the steel-based composite comprises a mould base, a composite mould casing and a pressing head, wherein the composite mould casing is in the shape of a hollow cylinder with the lower end connected with the mould base and consists of a low-heat-conduction ceramic layer and hot-work die steel, the low-heat-conduction ceramic layer is packaged by the hot-work die steel on the periphery, the pressing head is disposed inside the composite mould casing and capable of moving freely along the inner wall, and the size of the pressing head is matched with the inner diameter of the composite mould casing. The steel-based composite has excellent bearing capacity and wear resistance. The preparation method is easy in processing, short in production cycle and facilitates mechanical batch production. The preparation device is reusable, and accordingly production cost is reduced.

Description

technical field [0001] The invention relates to a steel-based composite material, a preparation method and a device thereof, and belongs to the technical field of steel-based composite materials. Background technique [0002] Ceramic / metal composite materials are often used in the anti-wear field because of their advantages such as good wear resistance, strong oxidation and corrosion resistance, high specific strength and specific modulus, and relatively low cost. At present, ceramic units in ceramic reinforced metal matrix composites are often ceramic particles, whiskers, fibers, three-dimensional porous preforms, columnar preforms, etc. Ceramic particles, whiskers, and fiber-reinforced metal matrix composites are the most common materials, which perform well under steady-state or low-load conditions; however, poor plasticity and toughness and weak impact resistance are fatal shortcomings. Under normal circumstances, it often presents a brittle fracture and the reinforceme...

AI Technical Summary

Problems solved by technology

Ceramic particles, whiskers, and fiber-reinforced metal matrix composites are the most common materials, which perform well under steady-state or low-load conditions; however, poor plasticity and toughness and weak impact resistance are fatal shortcomings. Under normal circumstances, it often presents a brittle fracture and the reinforcement phase falls off, which makes it difficult to exert the wear resistance of the composite material and poor reliability when used as an engineering component.

Three-dimensional porous preforms reinforced metal matrix composites can improve the load-carrying capacity to a certain extent, but the preparation process of preforms is complicated and difficult to popularize

[0003] The ceramic columns in CN101463182A "A Composite Material with Ultrafine Piezoelectric Ceramic Array Structure and Its Preparation Method" belong to the microscopic category and can only be used as functional materials

In CN101530905A "a crusher composite hammer and its casting method" and CN101530904A "a crusher composite hammer and its negative pressure casting method", the reinforcing phase can only be WC material with high cost and the metal liquid can only be It can penetrate into WC particles with large particle size, so it is difficult to prepare composite materials with high volume fraction

CN102581259A "ceramic column array reinforced metal matrix composite material or part and its preparation method" said ceramic columnar surface pretreatment needs to be carried out by one of surface metallization, ceramicization or metallization+ceramization method, the pretreatment process process cumbersome, high cost, and long preparation cycle

This method solves the problem of rapid solidification of high melting point metals such as molten steel, but the preparation of the ceramic insulation layer in the metal mold requires a special mold, a certain period of curing is required, and the insulation layer is scrapped after one-time use, resulting in waste of materials and increased costs.

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