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Super-strong and super-toughened ceramic cutter and manufacturing method thereof

A technology of ceramic cutting tools and manufacturing methods, which are applied in ceramic forming machines, cutting tools for lathes, manufacturing tools, etc., can solve the problems of insufficient fracture toughness, easy cracking, poor bending strength and thermal shock resistance, etc. The production process is easy to achieve, the friction force is small, and the production efficiency is high.

Active Publication Date: 2009-12-16
深圳市宏通新材料有限公司
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Problems solved by technology

Compared with other tool materials, the most obvious disadvantages of ceramic tools are insufficient fracture toughness, poor bending strength and thermal shock resistance, and cracks are prone to occur when the cutting temperature changes significantly

Method used

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  • Super-strong and super-toughened ceramic cutter and manufacturing method thereof

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Embodiment Construction

[0026] In order to further illustrate the technical means adopted by the present invention and its effects, the following describes in detail in conjunction with preferred embodiments of the present invention and accompanying drawings.

[0027] The invention provides a super-strength and super-tough ceramic cutting tool, which has the following components and contents: 89-92 parts of zirconia, 2-8 parts of yttrium oxide and 2-4 parts of rare earth oxide. The present invention breaks the routine that the traditional ceramic cutting tools generally use aluminum oxide base and silicon nitride as the base material, adopts zirconium oxide as the main base material, and is made with yttrium oxide and rare earth oxide in a certain proportion. As far as cutting tools are concerned, they have high hardness and good wear resistance, and have obvious advantages in thermal stability, thermal conductivity, corrosion resistance, oxidation resistance, high-temperature hardness, and high-tempe...

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Abstract

The invention relates to a super-strong and super-toughened ceramic cutter and a manufacturing method thereof. The ceramic cutter comprises the following components in portion by weight: 89 to 95 portions of zirconia, 2 to 8 portions of yttria, and 2 to 4 portions of rare earth oxide. The manufacturing method for the ceramic cutter comprises the following: step 1, mixing and granulating the zirconia, the yttria and the rare earth oxide; step 2, dry-pressing and molding the mixed and granulated raw materials by a press to obtain a blank; step 3, pre-sintering the blank obtained by the dry-pressing and molding at the low temperature to obtain a semi-finished cutter; step 4, thermally treating the semi-finished cutter obtained by the low-temperature pre-sintering at the low temperature; step 5, carrying out plasma high-temperature sintering for the semi-finished cutter which is thermally treated at the low temperature; and step 6, grinding and polishing the semi-finished cutter which is subjected to the plasma high-temperature sintering to obtain a finished cutter. The ceramic cutter has high hardness and good abrasion resistance, and has the remarkable advantages on thermal stability, heat conduction, corrosion resistance, oxidation resistance, high-temperature hardness, high-temperature strength, and the like. The method has the advantages of simple process and high production efficiency, and is favorable for mass mechanized production.

Description

technical field [0001] The invention relates to a cutting tool and a manufacturing method thereof, in particular to a super-strong and super-tough ceramic cutting tool and a manufacturing method thereof. Background technique [0002] Cutting is the most basic and reliable processing method in mechanical processing, and the performance of cutting tools is one of the decisive factors affecting the efficiency, precision and surface quality of cutting processing. Tool materials have gone through several development stages such as carbon tool steel, high-speed steel, cemented carbide, ceramics and superhard materials. According to CIRP data, due to the improvement of tool materials, the allowable cutting speed during processing doubles almost every 10 years. In the modern processing process, the most effective way to improve processing efficiency is still to adopt high-speed cutting processing technology. Due to its limitations, traditional cutting tools are no longer suitable ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B27/00B28B3/00B24B3/00
Inventor 邓湘凌
Owner 深圳市宏通新材料有限公司
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