High wear resisting iron-based composite material and preparation method thereof

Abstract

The invention relates to a high wear resisting iron-based composite material and a preparation method thereof. The method comprises the following steps: 1) large-size electric smelting zirconium corundum particles are used; 2) the electric smelting zirconium corundum particles are prepared into zirconium corundum particle ceramic blocks and cooled for standby application; 3) the obtained zirconium corundum particle ceramic blocks are arranged on the top of a resin sand mould cavity for an infiltration casting process, and a box is opened to take out pieces; and 4) heat treatment is carried out on the obtained zirconium corundum particle enhanced iron-based composite material. The method disclosed by the invention has the following advantages: 1, the process is simple and can be realized through an ordinary casting method, and the thickness of the composite layer can be adjusted in a wider range; 2, air holes and slag inclusion in the production process of the composite material can be effectively avoided; and 3, the production process is mechanized easily, the production cost is low, and the production efficiency is high.

Description

technical field [0001] The invention relates to an iron-based composite material and a preparation method thereof, in particular to a high wear-resistant iron-based composite material and a preparation method thereof. Background technique [0002] High chromium cast iron has high hardness and certain toughness, and is widely used in mining, metallurgy, building materials and chemical industries. Researchers have done a lot of work on improving the mechanical properties and wear resistance of high chromium cast iron and expanding its application, and achieved good results. However, when high-chromium cast iron is used in coal mill liners and other products, there are still shortcomings such as fast wear and short replacement cycles. The development of high wear-resistant iron-based surface composite materials is one of the important ways to make up for the above shortcomings. Iron-based surface composite materials usually use surface casting and infiltration composite techn...

AI Technical Summary

Problems solved by technology

Because the ordinary sand casting infiltration method needs to coat the inner wall of the cavity with a paste made of alloyed paint or adhering alloy powder, and the paste has problems such as complicated manufacturing process, difficulty in placing and fixing, and large position limitations, so the operation is extremely difficult. inconvenient

The outstanding problems of this method are as follows: First, it is difficult to remove pores and slag inclusions, which mainly come from the gasification and slagification of binder and flux when heated, and the adsorption of gas and powder in the voids of the powder coating or compact itself Another problem is that the preparation of the cast-infiltrated composite layer with poor wettability between the particles and the matrix is ​​powerless, which requires measures to improve the wettability between the particles and the matrix or apply external force to force the metal liquid to the powder layer. penetration

In addition to the above shortcomings, the ordinary sand casting infiltration method also has the disadvantages of small alloy layer thickness and high cost.

The existence of these problems makes this process mostly used in small batch process experiments, but it is difficult to realize large-scale industrial production