Metal ceramic cutting tool material and preparation method thereof

Abstract

The invention discloses a metal ceramic cutting tool material and a preparation method thereof. The material is prepared from the following powdery raw materials in percentage by weight: 13 to 22 percent of Ni, 10 to 16 percent of Mo, less than or equal to 1.0 percent of Cr2C3, 0.8 to 1.5 percent of C, 5 to 12 percent of WC and the balance of Ti(C,N). The particle sizes of particles of the powdery raw materials for the metal ceramic cutting tool material are matched in an optimal combination way. High-vacuum sintering is adopted in early stages of a preparation process, and low-pressure sintering is adopted within a sintering temperature range. The obtained metal ceramic cutting tool material is high in yield, stable in quality and high in comprehensive performance.

Description

technical field [0001] The invention belongs to the fields of mechanical processing and powder metallurgy, and in particular relates to a cermet cutting tool material and a preparation method thereof based on an optimized combination of particle sizes. Background technique [0002] Ti(C,N)-based cermet tools have attracted widespread attention at home and abroad because of their high hardness, wear resistance, red hardness, excellent chemical stability and extremely low friction coefficient. They are mainly used in steel and cast iron. High-speed finishing. Ti(C,N)-based cermets have shown great potential as an upgraded alternative to traditional WC-Co cemented carbides. Its high-temperature hardness is better than that of high-speed steel and WC-based cemented carbide, and its toughness is better than that of ceramic and superhard material tools. It also just fills the gap between WC-based cemented carbide tools and ceramic tools in the processing range. [0003] In recen...

AI Technical Summary

Problems solved by technology

However, the production status of domestic cemented carbide and cermet knives is not optimistic. The characteristic shown is that the production quality is unstable and cannot be compared with imported blades.

The overall performance of the metal-ceramic knives being tested in the Chinese market is obviously lower than that of the commonly used metal-ceramic knives in the Japanese market, and the product performance is unstable, especially the strength and toughness is poor, so the metal-ceramic knives are basically not used in practice

At present, most of the high-end cutting tools in China's cutting tool market rely on imports, and the cost of imported cutting tools is quite expensive, and they even have to be equipped with imported machine tools, which greatly increases the cost of workpiece processing

[0004] The existing published patent technologies in China have announced the preparation technology of cermet cutting tool materials with surface hardness ≥ 92.0HRA and bending strength ≥ 2000Mpa, but most of the preparation technologies are too complicated, the process control is difficult, and it is difficult to prepare stable high-performance sintered body, the uniformity of the actually prepared sintered body is poor

And at present, there is no stable high-performance domestically produced Ti(C,N)-based cermet industrialized product in the domestic market.

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