Methods for oxidation treatment of CBN abrasive particle and for preparation of ceramic binder CBN grinding tool by using CBN abrasive particle

A vitrified bond and oxidation treatment technology, used in the preparation of abrasive tools and abrasives, can solve the problems of low bending strength of grinding wheels, achieve uniform microstructure, avoid burns, and reduce friction coefficient.

Active Publication Date: 2014-01-08
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of low flexural strength of grinding wheels prepared with traditional vitrified bond and untreated CBN abrasive grains, the present invention provides a surface treatment process for CBN abrasive grains with simple process and uniform oxidation, and provides a The processed CBN abrasive grain adopts porous ceramic bond to obtain a CBN abrasive tool preparation method with high bending strength, uniform structure, good sharpness and sufficient wear resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 4

[0020] Taking embodiment 4 as an example, the specific implementation process of the CBN abrasive grain surface oxidation process of the present invention is:

[0021] Put 120μm CBN abrasive grains in a corundum crucible, and shake the crucible to make it evenly distributed and loosely piled up. The specific requirement is that the piled up area should be large (greater than 100cm 2 ), the accumulation height is low (less than 5mm), so that the abrasive grains are heated evenly and the surface of the abrasive grains is fully oxidized. Place the crucible in a high-temperature air furnace, raise the temperature to 950°C at a rate of 3°C / min and keep it warm for 60 minutes, then cool down to room temperature with the furnace; pour the heat-treated CBN abrasive into a mortar and grind it carefully to make it The surface adhesion of CBN abrasive grains caused by oxidation is opened to obtain fully oxidized CBN abrasive grains.

[0022] Mix 80% of oxidized abrasive grains with 20% ...

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Abstract

The invention discloses methods for oxidation treatment of a CBN abrasive particle and for preparation of a ceramic binder CBN grinding tool by using the CBN abrasive particle. The methods are characterized in that a uniform and compact film is formed on the surface of the CBN abrasive particle with granularity of 70 to 150 mu m through oxidation treatment of the CBN abrasive particle at a temperature of 850 to 1050 DEG C, thereby improving bonding strength of glass powder on the CBN abrasive particle and enhancing bending strength and wear resistance of the ceramic binder CBN grinding tool. Compared with a CBN grinding tool prepared from an unoxidized CBN abrasive particle, the CBN grinding tool prepared from the CBN abrasive particle having undergone oxidation treatment has the following characteristics: a structure is uniform, bonding strength between a binder and the CBN abrasive particle is high, bending strength of the grinding tool is great, and high speed grinding requirements of the CBN grinding tool are met.

Description

technical field [0001] The invention relates to abrasive material and abrasive tool preparation technology, in particular to a CBN (cubic boron nitride) abrasive grain surface treatment process and a method for preparing vitrified bond CBN abrasive tools from the treated abrasive grain. Background technique [0002] As a vitrified bond CBN grinding wheel for grinding and grinding, it has the advantages of good rigidity, good sharpness, wear resistance and easy dressing, because it does not react with iron, aluminum and other metals, so in the field of metal material processing, such as various steel materials , Metal titanium, aluminum and various alloys and other metal materials such as form grinding, finishing and surface polishing have been widely used, but because the chemical properties of CBN abrasives are inert, the vitrified bond has no effect on its surface. Wetness is low, usually the bonding force between vitrified bond and its surface is mainly mechanical bonding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/5831C04B35/622C04B35/63C03C8/24
Inventor 杨建锋杨兴化林光王波鲍崇高李春芳
Owner XI AN JIAOTONG UNIV
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