Wolfram carbide particle reinforcement base steel composite material and preparation method

Abstract

The invention discloses a wolfram carbide particle reinforcement base steel composite material and a preparation method, and belongs to the technical field of wear-resistant material preparation. Thecomposite material comprises a reinforcement body and a base body. The reinforcement body is of mixed powders of wolfram carbide particles and 45 steel metal powders, the base body is of coarse-grain45 steel metal powders, wherein the volume fraction of the 45 steel metal powders in the reinforcement body is 10-30%, and the volume fraction of the wolfram carbide particles in the reinforcement body is 70-90%. The preparation method comprises the steps that firstly, ball-milling is conducted to the mixed powders of wolfram carbide particles and 45 steel metal powders, the mixed powders after the ball-milling and the coarse-grain 45 steel metal powders are further mixed, and then the ball-milling is further performed, and then compression is performed, finally vacuum sintering is performed,and the wolfram carbide particle reinforcement base steel composite material is obtained. The preparation method is easy, the structure effect of the composite material is fully considered, the volumefraction of the reinforcement particles to the composite material is larger, the reinforcement particles are evenly distributed, breaking tenacity of the composite material is improved, strength is almost no loss, and shock resistance and oxidation resistance are better.

Description

technical field [0001] The invention relates to a tungsten carbide particle-reinforced steel-based composite material and a preparation method thereof, belonging to the field of preparation of wear-resistant composite materials. Background technique [0002] my country is a big country in the equipment manufacturing industry, and it is also a big country in the production and application of wear-resistant materials in the world. It has huge consumption in the fields of mining, metallurgy, building materials, machinery, national defense, electric power, railways and petrochemicals every year. Traditional wear-resistant cast iron and wear-resistant cast steel have low toughness and poor wear resistance in engineering applications. In response to these technical problems, researchers have developed wear-resistant materials with higher strength and hardness than traditional wear-resistant materials. A new generation of wear-resistant composite materials. However, with the slowd...

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Problems solved by technology

[0003] Chinese invention patent CN103667851A discloses a preparation method of particle-reinforced metal matrix composites. Firstly, the particles and matrix powder are mixed by ball milling, and then the mixed powder is sintered into a preform by spark plasma sintering (SPS). Finally, the preform is put into The advantage of the composite material prepared by this method is that the reinforcing particles can be evenly distributed inside the composite material, but the disadvantage is that due to the poor wettability between the particles and the matrix, the reinforcing particles and the matrix cannot be fully formed. The resulting metallurgical reaction has a low width of the interface, and does not take into account the configuration of the composite material. In the end, the mechanical properties of the composite material are rarely improved, and the cost performance of this process is also very low, which limits its industrial application. use

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