Solid solution type (Ti, Mo, Ta, Me) (C, N) nanopowder and preparing method thereof

Abstract

The invention provides solid solution type (Ti, Mo, Ta, Me) (C, N) nanopowder and a preparing method thereof, and relates to the technical field of composite materials. The preparing method comprises the following steps that oxide of each element serves as a raw material, and carbon black serves as a reducing agent and a carbonization agent; then water or alcohol serve as a ball-milling medium, and a slurry is obtained after ball-milling for 1-4h under the condition of 200-300 r / min; a mixture is obtained after the slurry is dried and granulated; finally, the mixture is transferred to a vacuum reaction device, and the final reaction temperature is raised to 1350-1500 DEG C by a programmed temperature raising system; and the solid solution type nanopowder is obtained after reacting in an N2 atmosphere for 2.5-4h. The obtained solid solution type nanopowder is a single phase with the particle size of 150-300 nm. Through regulating for various parameters and controlling for the process, solid solution of an obtained product is complete, the particle size reaches the nano level, the production cost is low, the process is simple, and the solid solution type (Ti, Mo, Ta, Me) (C, N) nanopowder and the preparing method thereof are suitable for industrialized scale production.

Description

technical field [0001] The invention relates to the field of composite materials, and in particular to a solid-solution type (Ti, Mo, Ta, Me) (C, N) nanopowder and a preparation method thereof. Background technique [0002] Ti(C,N)-based cermets have high hardness, wear resistance and red hardness, as well as excellent high temperature performance and chemical stability. As a tool base material, cermets are widely used in the finishing of steel and other materials due to their good processing properties. Compared with traditional carbide tools, their higher hardness and chemical stability enable high-speed machining and improve machining Efficiency, and the processed workpiece has a good surface finish. However, the relatively low strength and fracture toughness of cermets greatly limit their applications. [0003] In recent years, researchers have conducted a lot of research on the performance improvement of Ti(C,N)-based cermets. Refinement of powder particle size and pr...

AI Technical Summary

Problems solved by technology

[0004] The inventors have found that in the existing solid solution powder method, it still cannot overcome the thermodynamically difficult solid solution status of some metal carbides such as TaC, and there is still a single phase of TaC or NbC in the solid solution powder, causing the product phase Impure ingredients

However, the method of increasing the solid solution reaction temperature will inevitably lead to the coarse particle size of the product, which is difficult to refine, and it is difficult to achieve nano-scale solid solution powder, which greatly affects the performance of the product.

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