A kind of preparation method of in-situ particle reinforced metal matrix composite material

Abstract

A preparation method of an in-situ particle reinforced metal matrix composite material belongs to the field of powder metallurgy. In the present invention, titanium powder, reinforcing body X and binder M are mixed uniformly in a certain proportion, and after pressing and forming, a two-step sintering process of nitrogen sintering and high-temperature sintering is used to obtain high-performance in-situ particle reinforced metal matrix composite material. In the present invention, using titanium powder and nitrogen, C, B or B 4 The in-situ reaction between C generates fine and uniform TiC, TiB, TiN or Ti(C,N) strengthening phase particles. At the same time, Fe, Ni, and Co are used as binders to increase the wettability between the strengthening phase and the binding phase, so as to realize the metallurgical bonding between the strengthening particles and the metal matrix, so as to improve the toughness of the metal matrix composite material, and achieve full densification, eliminating the need for residual pores. The metal matrix composite material is prepared by powder metallurgy process, which can realize in-situ particle strengthening, and has the advantages of simple process, high utilization rate of raw materials, complex and changeable material shape, and high production efficiency, which is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of powder metallurgy and provides a preparation method of an in-situ particle reinforced metal matrix composite material. Background technique [0002] In recent years, with the rapid development of modern manufacturing industry, metal matrix composites have become an indispensable new material. In metal matrix composites, the metal matrix is ​​used as the matrix, TiB, TiB 2 , Ti(C,N), B 4 C, TiN and Si 3 N 4 and other ceramic particles as the strengthening phase. Among them, ceramic particles such as TiN, TiC, TiB and Ti(C,N) have the advantages of high melting point, high hardness, good corrosion resistance and oxidation resistance, and have good thermal conductivity, electrical conductivity and chemical stability, suitable for Tool, mold making and aerospace and many other fields. Generally, TiN, TiC, TiB and Ti(C,N) ceramic particles are prepared by high temperature solid solution method, high temperature ni...

AI Technical Summary

Problems solved by technology

Generally, TiN, TiC, TiB and Ti(C,N) ceramic particles are prepared by high-temperature solid solution method, high-temperature nitriding method, sol-gel method, ammonolysis method, high-temperature self-propagating reaction method, high-energy ball milling method and in-situ synthesis method. Among them, the in-situ synthesis method can effectively solve the interface reaction between the reinforcement material and the matrix, thereby improving the hardness, strength, wear resistance, creep resistance and high cycle fatigue resistance of the material, while maintaining the surface of the reinforcement without pollution, but in the preparation process, there is still a high melting point, and a high sintering temperature is required to provide the driving force for sintering, resulting in problems such as coarse grains, uneven structure, non-dense sintering, or component segregation.