Ceramic applied to high-bending-resistance cutter and preparation method of ceramic

Abstract

The invention discloses a ceramic applied to a high-bending-resistance cutter. The ceramic is prepared from the following raw materials in parts by weight: 3-4 parts of Bi(NO3)3.5H2O, 2 parts of CS(NH2), 1-2 parts of LiOH, 10-13 parts of titanium diboride crystal whiskers, 3-5 parts of barite, 3-4 parts of vermiculite, 2-3 parts of graphite, 4-5 parts of high-alumina fly ash, 12-14 parts of quartz crucible waste, 4-6 parts of zirconium oxychloride, 70-76 parts of zirconium 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 an abrasion-resistant additive. The titanium diboride crystal whiskers are added into the ceramic, so that the toughness of the ceramic is improved; the graphite is added into the ceramic, the lubrication property of the ceramic is improved; the quartz crucible waste is added into the ceramic, the heat resistance of the ceramic is improved; the cost is saved; the cutter prepared by the ceramic is high in breaking toughness, high in bending resistance, high in hardness and high in abrasion resistant performance, long in service life and reasonable in cost performance; by using the abrasion-resistant additive, 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 ceramics for cutting tools with high bending strength 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 properti...

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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.