Zirconium boride ceramics for cutting tools and preparation method thereof

Abstract

The invention discloses zirconium boride ceramic applied to cutters. The zirconium boride ceramic is prepared from the following raw materials in parts by weight: 80-90 parts of zirconium boride, 2-3 parts of bentonite, 3-4 parts of magnesium chloride, 3-4 parts of boric acid, 0.2-0.3 part of magnesium nitrate, 3-4 parts of brucite, 1.5-2 parts of pseudo-boehmite, 2-3 parts of bismuth oxide, a proper amount of ethyl alcohol, a proper amount of deionized water, 1-1.5 parts of polyacrylic acid, 1.2-1.6 parts of polyethylene glycol and 4-5 parts of abrasion-resistant additives. The ceramic is high in high-temperature resistance, high in strength at the normal temperature and the high temperature, excellent in resistance to heat shocks, small in resistance and oxidation-resistant at the high temperature, and is suitable for manufacturing cutters; the cutters can be used for cutting high-hardness materials; by virtue of the application of the abrasion-resistant additives, the abrasion resistance and the heat resistance of the ceramic can be improved.

Description

technical field [0001] The invention relates to the field of ceramic tool materials, in particular to a zirconium boride ceramic for cutting tools and a preparation method thereof. Background technique [0002] At present, carbide-based cemented carbide (WC-Co, WC-TiC-Co) is widely used in cutting steel, cast iron, alloy steel and stainless steel. For some special materials, diamond and cubic boron nitride (CBN) with the highest hardness are also used, but their strength is lower than that of cemented carbide, and diamond tools are not conducive to cutting steel materials, because diamonds with carbonaceous elements are easily combined with iron elements. The reaction produces iron carbide, which causes diamond loss. The ceramic tool does not react to many materials such as iron-based, and has better performance for processing chilled cast iron, Stellite alloy, heat-resistant nickel-based alloy, etc. [0003] At present, ceramic knives have many excellent properties, such ...

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Problems solved by technology

[0003] At present, ceramic knives have many excellent properties, such as high hardness, high density, high temperature resistance, anti-magnetization, anti-oxidation, strong corrosion resistance, good chemical stability, high wear resistance, etc., but the cost of these ceramics is relatively high. However, it is necessary to further study new ceramic materials to reduce costs and improve the performance of ceramic tools such as toughness, heat dissipation, bending resistance, and wear resistance.