Preparation technology of metal ceramic bonding agent diamond/ cubic boron nitride (CBN) grinding wheel

A ceramic bond and preparation technology, which is applied in metal processing equipment, manufacturing tools, grinding/polishing equipment, etc., can solve problems such as loss of function, long sintering time, metal oxidation, etc., and achieve simple preparation process and improved performance Effect

Inactive Publication Date: 2012-02-29
广东奔朗新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the long sintering time of the existing sintering method, the metal is easily oxidized during sintering and loses its proper function

Method used

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  • Preparation technology of metal ceramic bonding agent diamond/ cubic boron nitride (CBN) grinding wheel
  • Preparation technology of metal ceramic bonding agent diamond/ cubic boron nitride (CBN) grinding wheel
  • Preparation technology of metal ceramic bonding agent diamond/ cubic boron nitride (CBN) grinding wheel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The cermet bonded diamond CBN grinding wheel buried in sand was placed in a reducing atmosphere furnace. Check that the equipment is in good condition, the gas passage is unobstructed, and hydrogen gas is introduced. Set the heating curve: from room temperature to 300°C, the heating rate is 2°C / min; at 300°C for 1.5h; from 300°C to 750°C, the heating rate is 1.5°C / min; at 750°C for 2h; from 750°C Raise the temperature to 900°C with a heating rate of 1°C / min; hold at 900°C for 1.5h; then cool with the furnace.

Embodiment 2

[0020] The cermet bonded CBN grinding wheel buried in sand was placed in a reducing atmosphere furnace. Check that the equipment is in good condition, the gas passage is unobstructed, and hydrogen gas is introduced. Set the heating curve: from room temperature to 300°C, the heating rate is 2.2°C / min; at 300°C for 1.2h; from 300°C to 750°C, the heating rate is 1.8°C / min; at 750°C for 1.8h; from 750°C ℃ to 900℃, the heating rate is 1.2℃ / min; hold at 900℃ for 1.4h; cool with the furnace.

[0021] The formula of two embodiment emery wheels, mixing and cold pressing process are all the same:

[0022] Its formula and weight ratio are: CBN abrasive (100 / 120) 60%.

[0023] Metal ceramic bond 30%

[0024] Wetting agent and binder 5%

[0025] Auxiliary material (SIC or Al 2 o 3 ) 5%

[0026] The raw materials are mixed evenly, then cold-pressed, and finally sintered. After sintering, the matrix is ​​matched, and then the product performance is tested.

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Abstract

The invention discloses a preparation technology of a metal ceramic bonding agent diamond / cubic boron nitride (CBN) grinding wheel. The metal ceramic bonding agent diamond / CBN grinding wheel is sintered by adopting a reducing atmosphere furnace. The technology comprises the following steps of: checking whether the equipment is complete before sintering, and introducing hydrogen if the gas passage is smooth; setting a heating curve, wherein the heating rate is 2 to 3 DEG C per minute from room temperature to 300 DEG C, the heat is preserved for 1 to 1.5 hours at the temperature of 300 DEG C, the heating rate is 1.5 to 2 DEG C per minute from 300 to 750 DEG C, the heat is preserved for 1.5 to 2 hours at the temperature of 750 DEG C, the heating rate is 1 to 1.5 DEG C per minute from 750 to 900 DEG C, and the heat is preserved for 1 to 1.5 hours at the temperature of 900 DEG C; and performing furnace cooling. Compared with the traditional preparation technology, the preparation technology has the advantages that: metal components in the bonding agent can be effectively protected from being oxidized in reducing atmosphere sintering, and the performance of the CBN abrasive particles is protected from being affected at a high temperature. Compared with air atmosphere sintering, the preparation technology has the advantages that: the service life of the grinding wheel is prolonged by about 15 percent, the grinding wheel has good self-sharpening property, and the effect of a machined product is obviously improved.

Description

technical field [0001] The invention relates to a preparation process of a cermet bonded diamond / CBN grinding wheel, belonging to the technical field of preparation processes of superhard material products. Background technique [0002] Metal-ceramic bonded diamond / CBN grinding wheels are mainly used in the processing of metal materials, with broad application prospects and huge market capacity. Compared with ordinary corundum grinding wheels, metal-ceramic bonded diamond / CBN grinding wheels have many advantages in processing metal materials: the service life is increased by about 100 times, the waste water and slag is reduced to 1 / 100, which can reduce the replacement times and time of grinding wheels, and save the cost of grinding wheels. The dressing time can be doubled, the processing efficiency can be doubled, the grinding wheel expansion is small, it is not easy to burn, it is easy to control the machining accuracy of the workpiece, no dressing is required, and the wor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24D18/00
Inventor 刘泓陶洪亮刘仲武宋鹏涛刘跃华
Owner 广东奔朗新材料股份有限公司
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