A kind of wear-resistant special ceramics for cutting tools and its preparation method

Abstract

The invention relates to a special antiwear ceramic for cutting tools, which is prepared from the following raw materials in parts by weight: 8-12 parts of chrome oxide, 12-14 parts of tin oxide, 13-15 parts of riebeckite, 18-22 parts of Nb2O5, 5-7 parts of Ta2O5, 24-27 parts of vapor-phase aluminum oxide, 9-11 parts of dravite, 20-25 parts of porcelain clay, 0.7-1.2 parts of sodium dodecyl benzene sulfonate, 1-2 parts of magnesium oxide, 0.4-0.6 part of phosphate, a right amount of deionized water, a right amount of ethanol, 1.7-2 parts of polyethyleneglycol and 3-4 parts of wear-resistant assistant. The folding strength of the ceramic is greater than 50 MPa, the number of times of circulating quenching and anti-thermal-shock between 1000 DEG C and 25 DEG C is greater than 35, and the ceramic is suitable for cutting tools and has the advantages of long service life and low cost. The vapor-phase aluminum oxide, Nb2O5 and Ta2O5 are added to enhance the fineness, compactness and wear resistance of the ceramic. The wear-resistant assistant can enhance the surface smoothness, wear resistance and heat resistance of the ceramic.

Description

technical field [0001] The invention relates to the field of ceramic tool materials, in particular to a wear-resistant special ceramic for cutting tools and a preparation method thereof. Background technique [0002] With the development of high technology, the mechanical processing industry has put forward more stringent and demanding requirements for tool materials. Now it is necessary to process materials with higher hardness, higher cutting efficiency, and higher machining accuracy. This requires higher For the performance of cutting tools, traditional cutting materials such as high-speed steel are not hard enough, and scarce resources such as molybdenum and nickel are wasted, so ceramic cutting tools came into being. Ceramic cutting tools have the characteristics of high hardness, high density, high temperature resistance, anti-magnetization, anti-oxidation, strong corrosion resistance, good chemical stability, and high wear resistance, but they are still fragile, poor ...

AI Technical Summary

Problems solved by technology

[0002] With the development of high technology, the mechanical processing industry has put forward more stringent and demanding requirements for tool materials. Now it is necessary to process materials with higher hardness, higher cutting efficiency, and higher machining accuracy. This requires higher For the performance of cutting tools, the hardness of traditional high-speed steel and other cutting materials is not enough, and the scarce resources such as molybdenum and nickel are wasted, so ceramic cutting tools came into being

Ceramic cutting tools have the characteristics of high hardness, high density, high temperature resistance, anti-magnetization, anti-oxidation, strong corrosion resistance, good chemical stability, and high wear resistance, but they are still fragile, poor heat dissipation, and poor thermal shock resistance. , limited anti-wear performance and other shortcomings need to be improved, and at the same time need to continuously reduce production costs to achieve the maximum benefit of the enterprise and promote scientific and technological progress