Iron-based composite material reinforced by in-situ titanium carbide grains and preparing method thereof

Abstract

The invention discloses an iron-based composite material reinforced by in-situ titanium carbide grains and a preparing method thereof. The preparing method is characterized in that: high-strength high-toughness spheroidal graphite cast iron is used as a matrix, in-situ grown submicron titanium carbide grains are used as reinforcing grains, and the titanium carbide grains are uniformly distributedon the spheroidal graphite cast iron matrix to obtain a high-strength high-toughness iron-based composite material; and iron powder, titanium powder and carbon powder are fully mixed by utilizing a mechanical alloying method to form composite powder, spheroidal graphite cast iron is molten and treated by a conventional method, the composite powder is added to molten iron during secondary inoculation in proportion, constant temperature is kept for 5-10min and casting is carried out to obtain a cast-state composite material, and the cast-state composite material is subjected to isothermal quenching heat treatment to obtain the iron-based composite material. According to the iron-based composite material prepared by the method disclosed by the invention, the in-situ titanium carbide grains are small in size and uniformly distributed on the matrix so as to ensure the characteristics of high strength and high toughness of the iron-based composite material.

Description

technical field

[0001] The invention relates to an iron-based composite material and a preparation method thereof, in particular to an in-situ titanium carbide particle reinforced iron-based composite material and a preparation method thereof. Background technique

[0002] By adding high-strength and high-hardness ceramic reinforcement particles to iron-based materials, iron-based composite materials can be obtained, which effectively improves the strength of iron-based materials, and has been widely used in service conditions such as heat resistance and wear resistance. According to the source of particle reinforcement, iron-based composites can be divided into external particle-reinforced iron-based composites and in-situ particle-reinforced iron-based composites. Since the reinforced particles generated in situ are often thermodynamically stable phases directly generated from the metal matrix through chemical reactions, the interface between the reinforced particles and t...

Images