Ti(C,N)-based metal ceramic and its application

Abstract

The invention discloses a Ti(C,N)-based metal ceramic and its application. The Ti(C,N)-based metal ceramic is formed by using a ceramic phase and a bonding phase, and concretely comprises 48.16-54.29% of Ti, 7.1-11.02% of Mo, 3.52-6.31% of W, 15.56-19.88% of Ni, 0.47-0.69% of Y, 1.53-2.43% of Al, 9.37-12.54% of C and 3.98-4.99% of N. A rare earth element Y and AlN are added in the preparation of metal ceramic, and the rare earth element Y has a cleaning effect on a phase interface, so the bonding strength of the phase interface is enhanced, and the strength and the toughness of a material are improved; and the added AlN enhances the bonding phase of Ti(C,N)-based metal ceramic, so the hardness and the strength of the metal ceramic are improved. Cutting tools made by using the Ti(C,N)-based metal ceramic prepared in the invention have the advantages of low density, high hardness, small steel friction coefficient, small bonding wear and diffusion wear during cutting, and good red hardness.

Description

technical field [0001] The invention relates to the technical field of alloy materials, in particular to a Ti(C,N)-based cermet with low density and high hardness and low production cost and its application. Background technique [0002] The development of cermets has mainly gone through three processes: 1. TiC-Ni-based cermets were invented in Germany in 1929. Although they have excellent high-temperature mechanical properties and low density, due to the poor wettability of Ni to TiC particles, TiC Particles are easy to aggregate and grow, and the material strength and toughness are poor; 2. In 1956, Ford Company of the United States invented TiC-Mo 2 C-Ni cermet, the strength of cermet is improved; 3. In 1971, the Vienna University of Technology discovered that TiC-Mo 2 Adding TiN to C-Ni cermet can further refine the hard phase particles, improve high temperature creep resistance, red hardness, and room temperature toughness. [0003] However, with the introduction of T...

AI Technical Summary

Problems solved by technology

[0004] In recent years, researchers have carried out a lot of research. Through the design of components in material preparation, the study of reaction mechanism, the optimization of manufacturing methods and processing technology, it is hoped that the hardness and flexural strength of the material can be improved at the same time, making it comprehensive The performance can meet the needs of industrial production. However, according to the scope and proportion of domestic cermet products, its industrial development is still in the initial stage, and the performance still needs to be improved.

With the gradual understanding of nanomaterials, there are more and more studies on the preparation of nano-Ti(C, N)-based cermets by using nano-powders, but so far it has not been possible to prepare very dense Ti(C, N)-based cermets. There are many problems to be solved in the preparation process. In addition, the preparation cost of nano-ceramic powder is very high, so the development of a new sintering method suitable for nano-Ti(C, N)-based cermets and the process of preparing nano-mixed powders will become a major issue. previous research focus

Images