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Ceramic binder cubic boron nitride grinding wheel and preparation method thereof

A vitrified bond and cubic boron nitride technology, which is applied in manufacturing tools, metal processing equipment, grinding/polishing equipment, etc., can solve the problems of reducing the service life of grinding wheels and increasing production risks, achieving good results and improving service life Effect

Inactive Publication Date: 2017-09-22
福建瑞祺新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are the following disadvantages: First, the use of hydrogen in the sintering process will greatly increase the production risk
Second, cooling with the furnace will cause a certain internal stress inside the material, which will reduce the service life of the grinding wheel when grinding the workpiece

Method used

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Examples

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Effect test

preparation example Construction

[0043] A method for preparing a vitrified bond cubic boron nitride grinding wheel, comprising the steps of:

[0044] (1) Mix the raw materials evenly and put them into the pressing mold for cold pressing, and then put the cold-pressed grinding wheel into the vacuum sintering furnace;

[0045] (2) After the furnace door is sealed, vacuumize the vacuum sintering furnace through a vacuum pump, so that the vacuum degree in the vacuum sintering furnace is less than 10 -2 up to Pa;

[0046] (3) Set the sintering temperature and start the sintering furnace to raise the temperature of the grinding wheel in the sintering furnace to 850°C for sintering for 0.5 to 1.5 hours;

[0047] (4) After sintering, lower the furnace temperature to below 100°C, open the sintering furnace and take out the grinding wheel to complete the preparation of the vitrified bonded cubic boron nitride grinding wheel.

[0048] Preferably, in the step (1), first place the pressed grinding wheel in the graphite ...

Embodiment 1

[0051] A method for preparing a vitrified bond cubic boron nitride grinding wheel, comprising the steps of:

[0052] (1) According to the addition ratio of 65% of cubic boron nitride abrasive, 25% of vitrified bond, 6% of functional additive and 4% of auxiliary material mixed with wetting agent and binder, the raw materials are mixed evenly Put it into a pressing mold for cold-press forming, then place the cold-pressed grinding wheel in the graphite boat, then put the graphite boat and the grinding wheel into the vacuum sintering furnace together, and place the Carbon paper spaced apart;

[0053] (2) After the furnace door is sealed, vacuumize the vacuum sintering furnace through a vacuum pump, so that the vacuum degree in the vacuum sintering furnace is less than 10 -2 up to Pa;

[0054] (3) Set the sintering temperature and start the sintering furnace to raise the temperature of the grinding wheel in the sintering furnace. When the sintering furnace is heated from normal t...

Embodiment 2

[0057] A method for preparing a vitrified bond cubic boron nitride grinding wheel, comprising the steps of:

[0058] (1) According to the addition ratio of 65% of cubic boron nitride abrasive, 25% of vitrified bond, 6% of functional additive and 4% of auxiliary material mixed with wetting agent and binder, the raw materials are mixed evenly Put it into a pressing mold for cold-press forming, then place the cold-pressed grinding wheel in the graphite boat, then put the graphite boat and the grinding wheel into the vacuum sintering furnace together, and place the Carbon paper spaced apart;

[0059] (2) After the furnace door is sealed, vacuumize the vacuum sintering furnace through a vacuum pump, so that the vacuum degree in the vacuum sintering furnace is less than 10 -2 up to Pa;

[0060] (3) Set the sintering temperature and start the sintering furnace to raise the temperature of the grinding wheel in the sintering furnace. When the sintering furnace is heated from normal t...

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Abstract

The invention discloses a ceramic binder cubic boron nitride grinding wheel and a preparation method thereof. The ceramic binder cubic boron nitride grinding wheel is sintered in a vacuum atmosphere. The sintering process comprises the steps that the temperature is increased to 200 DEG C from the room temperature, and the temperature increasing rate is 4-5 DEG C / min; heat preservation is performed for 1-2 hours at the temperature of 200 DEG C; the temperature is increased to 300 DEG C at the temperature increasing rate of 3-4 DEG C / min, and heat preservation is performed for 1-2 hours; the temperature is increased to 500 DEG C at the temperature increasing rate of 3-4 DEG C / min, and heat preservation is performed for 1-2 hours; the temperature is increased to 850 DEG C at the temperature increasing rate of 1-2 DEG C / min, and heat preservation is performed for 0.5-1.5 hours; and the temperature is lowered to 700 DEG C at the temperature decreasing rate of 1-1.5 DEG C / min, and then the grinding wheel is cooled along with a furnace. Compared with a traditional sintering process, oxidation of non-oxidation substances in the grinding wheel can be effectively prevented through vacuum sintering, the high-temperature performance of the cubic boron nitride grinding wheel is protected against influences, compared with cubic boron nitride prepared through the traditional process, the service life of the grinding wheel is prolonged by about 20%, and the surface effect of workpiece machining is also good.

Description

technical field [0001] The invention relates to the technical field of ceramic products and production, in particular to a ceramic bonded cubic boron nitride grinding wheel and a preparation method thereof. Background technique [0002] As superhard materials, cubic boron nitride and diamond abrasives are widely used in the field of grinding and cutting due to their excellent performance. Compared with diamond, cubic boron nitride abrasives have good thermal conductivity and heat resistance and are resistant to iron The chemical inertness of group metals greatly expands its application fields. Among the various superhard products of cubic boron nitride, vitrified bonded grinding wheels not only have the advantages of sharp cutting, small grinding force, high production efficiency, long service life, easy shaping and sharpening, and high grinding accuracy, but also have The temperature of the workpiece is low during grinding, which can eliminate the residual tensile stress a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24D3/14B24D18/00
CPCB24D3/14B24D18/00
Inventor 阮秀仕吴鹏
Owner 福建瑞祺新材料有限公司
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