Low-temperature high-strength devitrified glass ceramics wedding agent

A technology of ceramic bond and glass ceramics, which is applied in the field of diamond and cubic boron nitride superhard material grinding tools, can solve the problems that cannot be used as superhard materials, and achieve low thermal expansion coefficient, high strength and low sintering temperature Effect

Inactive Publication Date: 2008-06-11
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, general ceramic materials are difficult to sinter at such a temperature, so they cannot be used as a binder for superhard materials.

Method used

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with the inventive concept and specific embodiments of the present invention.

[0012] With the continuous progress of processing technology and numerical control technology and the continuous emergence of new materials, the requirements for processing tools are getting higher and higher, especially for the processing efficiency, use speed and service life of tools. Therefore, The abrasive sharpness, strength, and corrosion resistance of processing coolant are required to be higher and higher, and these factors are not only related to the performance of the abrasive itself, but also related to the performance of the bond itself in the tool. For glass-ceramic binders, glass-ceramic is not only much stronger than ordinary glass and mother glass, but also has much higher corrosion resistance than ordinary glass. Generally speaking, with the increase of crystal content in glass-ceramic, each indicators hav...

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PUM

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Abstract

The invention discloses a low-temperature high-strength microcrystalline glass vitrified bond used for preparing grinding tools made of superhard material diamond and cubic boron nitride. The components and the weight percentage are that SiO2 takes 40-70%, B2O3 takes 5-25%, Al2O3 takes 2-5%, Na2O takes 2-15%, K2O takes 2-5%, MgO takes 2-4%, CaO takes 2-4%, Li2O takes 1-10%, ZrO2 takes 2-5% and Sb2O3 takes 2-5%. The microcrystalline glass is abtaind by sintering the powder, the temperature of sintering-crystallization is 700-900 DEG C, the thermal expansion coefficient is 4-10*10-6 / DEG C and the bending strength can reach 160-200MPa. The grinding tool prepared by the combination of the microcrystalline glass and the powders of diamond and cubic boron nitride can satisfy the using speed of 160m / s or more. The invention has the advantages of low sintering temperature of the bond, low thermal expansion coefficient and high strength.

Description

technical field [0001] The invention relates to diamond and cubic boron nitride superhard material grinding tools, in particular to a bonding agent for preparing diamond and cubic boron nitride superhard material grinding tools. Background technique [0002] The shape and precision of any workpiece or product almost needs to be completed and guaranteed by processing, the difference is only the processing method. The hardness of any processing tool must be greater than the hardness of the workpiece to be processed in order to effectively complete its mission. Diamond and cubic boron nitride are two of the hardest materials in the world at present, collectively referred to as superhard materials, based on their superhard characteristics, as processing tools, the two can greatly improve the shape retention, durability and processing efficiency of processing tools , processing accuracy, processing tool life, etc., and thus reduce the processing c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/00C04B35/63
Inventor 朱玉梅李志宏
Owner TIANJIN UNIV
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