NiCrAlY high-temperature sintering ZTA particle reinforced steel-based composite material and preparation method thereof

Abstract

The invention discloses a NiCrAlY high-temperature sintering ZTA particle reinforced steel-based composite material and a preparation method of the NiCrAlY high-temperature sintering ZTA particle reinforced steel-based composite material. Surface microroughening is conducted on ZTA Particles. The thermal stability of a ceramic coating is improved by adding an active element Y. The adsorption capacity of the Cr and Al on the O element can greatly improve the wettability of Ni and the ceramic particles. The interface combination is caused to be converted into metallurgical bonding by combining mechanical combining. High combining and impact strength is realized. Working condition environment in a high-load state is realized. A self-made adhesive is then added for shaping. A preform with a honeycomb structure is obtained after drying treatment. Then the honeycomb preform is subjected to heat treatment to improve the bonding strength of the honeycomb preform. The honeycomb preform is put into a sand box, molten metal is cast, and the ZTA reinforced steel-based composite material with high wear resistance is obtained after cooling. The wear-resistant composite material prepared by the technology has high impact resistance and wear resistance, and guarantees service safety under severe working conditions.

Description

technical field [0001] The invention belongs to the technical field of preparation of wear-resistant materials, and in particular relates to a NiCrAlY high-temperature sintered ZTA particle-reinforced iron-based composite material and a preparation method thereof. Background technique [0002] Large-scale composite materials are necessary equipment for crushing materials such as minerals and building materials in mining, metallurgy, cement, electric power and other industries, and composite materials are the most consuming wear parts in these devices. Only in the cement and electric power industries, the annual consumption of large-scale composite materials in my country is as high as 800,000 tons, causing huge economic losses. At present, due to the poor performance stability, wear resistance and short service life of domestic large-scale composite materials, it has become a key factor restricting the crushing efficiency in mines, so most of the domestic large-scale composi...

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Problems solved by technology

At present, the research on WC particle-reinforced iron-based composite materials is relatively extensive, mainly because of the high hardness of WC particles, which can endow the composite material with excellent wear resistance, and its good wettability with high-temperature molten iron is helpful for the composite material. preparation, but the application of WC reinforced ceramics has the following fatal problems: firstly, the price of WC is expensive, and the linear expansion coefficient of WC (3.8×10 -6 K -1 ) and steel materials (9.2~16.9×10 -6 K -1 ) has a large difference, the interface between the particles and the iron matrix is ​​prone to cracks due to thermal stress during the preparation process and heat treatment of the composite material, and the thermal shock resistance of the composite material is poor

Due to the poor binding between ZTA particles and iron base, the high chromium cast iron prepared by casting infiltration method is simply mechanically combined with ZTA, and the bonding strength is low, which seriously affects the wear-resistant parts under harsh actual working conditions. Scale application

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