Gradient alloying granulation method of diamond abrasive grain surface binding agent

A gradient alloy and binder technology, applied in chemical instruments and methods, abrasives, manufacturing tools, etc., can solve the problems of inability to granulate pellets, reduce product quality, different specific gravity, etc., achieve good performance, improve efficiency, high The effect of bonding

Active Publication Date: 2015-05-06
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional granulation method and process, due to the different specific gravity of metal powders of different elements and the technical problems of one-time molding, cannot meet our requirements for the content of metal elements at different levels of granulated pellets, resulting in unnecessary waste and reduced product quality.

Method used

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  • Gradient alloying granulation method of diamond abrasive grain surface binding agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] The gradient alloying granulation method of diamond abrasive surface binder, the steps are:

[0070] 1) Take 80 / 100 diamond, wash and dry it, put it into the drum of the first device of the present invention, turn on the ultrasonic agitator and drum, and start spraying after 30 seconds, and the spraying adhesive is 30% liquid phenolic resin. Close the spray nozzle, open the powder supply nozzle, and supply the powder as a cobalt-based alloy containing 5wt% Ti (that is, the mass percentage of Ti in the cobalt-based alloy containing Ti is 5%). After the powder supply is complete, turn off the powder supply nozzle, stop the ultrasonic agitator and the drum after 1 minute, take out the granulated particles, and sieve to remove the excess powder.

[0071] 2) Transfer the sieved particles into the drum of the second set of equipment, repeat the previous step, the difference is that the spray slurry is liquid paraffin, and the powder supply is 85-15 bronze powder containing 2w...

Embodiment 2

[0076] The gradient alloying granulation method of diamond abrasive surface binder, the steps are:

[0077] 1) Take 80 / 100 mesh diamond, wash and dry it, put it into the drum of the first device of the present invention, turn on the ultrasonic mixer and drum, and start spraying after 30s, the spraying adhesive is 30% liquid phenolic resin , close the spray nozzle, open the powder supply nozzle, the supply powder is cobalt-based alloy containing 5wt%Ti. After the powder supply is complete, turn off the powder supply nozzle, stop the ultrasonic agitator and the drum after 1 minute, take out the granulated particles, and sieve to remove the excess powder.

[0078] 2) Transfer the sieved particles into the drum of the second set of equipment, and repeat the previous step, the difference is that the spraying is liquid paraffin, the powder supply is a cobalt-based alloy with a Ti content of 2wt%, and the powder is removed by sieving.

[0079] 3) Transfer the sieved particles into t...

Embodiment 3

[0083] The gradient alloying granulation method of diamond abrasive surface binder, the steps are:

[0084] 1) Take 35 / 40 (or 40 / 50) mesh diamonds, wash and dry them, put them into the drum of the first device of the present invention, turn on the ultrasonic mixer and drum, and start spraying after 30s, and spray the adhesive It is 30% liquid phenolic resin. Close the spray nozzle, open the powder supply nozzle, and supply the powder as a cobalt-based alloy containing 5wt%Ti. After the powder supply is complete, turn off the powder supply nozzle, stop the ultrasonic agitator and the drum after 1 minute, take out the granulated particles, and sieve to remove the excess powder.

[0085] 2) Transfer the sieved particles into the drum of the second set of equipment, and repeat the previous step, the difference is that the spraying is liquid paraffin, and the powder supply is cobalt-based alloy powder containing 2wt% Ti, and the powder is removed by sieving.

[0086] 3) Transfer ...

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Abstract

The invention discloses a gradient alloying granulation method of a diamond abrasive grain surface binding agent. The diamond abrasive grains with a gradient alloying binding agent layer comprise diamond grains; an inner binding agent, a middle binding agent and an outer binding agent are arranged on the surfaces of the diamond grains in sequence; and the content of carbide forming elements in the binding agent is gradually decreased layer by layer. A gradient alloying granulation device of the diamond abrasive grain surface binding agent is used for preparing the diamond abrasive grains and comprises a roller, a slurry feeding sprayer, a power feeding sprayer and an ultrasonic stirrer. The gradient alloying granulation method of the diamond abrasive grain surface binding agent uses at least three sets of above devices, and comprises the following steps: a, wrapping the inner binding agent on the surfaces of the diamond grains; b, wrapping the middle binding agent on the surfaces of the diamond grains; and c, wrapping the outer binding agent on the surfaces of the diamond grains. The prepared abrasive grains have relatively good performance and the preparation method is high in efficiency.

Description

technical field [0001] The invention relates to a method for gradient alloying and granulation of diamond abrasive grain surface binders. Background technique [0002] In the production process of diamond tools in recent years, the emergence of granulation technology has improved the fluidity of powder, reduced the segregation and enrichment of diamond and powder, ensured the precision and efficiency of the manufacturing process, and the granulation of different formulations and requirements Technology is being used more and more. [0003] In the requirements of diamond products, we hope to improve the holding force of diamond abrasive grains and have better toughness space. In the prior art, the surface treatment technology of diamond abrasive grains, such as titanium plating, nickel plating, etc., is often used to improve the abrasive holding force, but the combination between the treated diamond and the metal matrix is ​​ignored, and the effect is not obvious. Due to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/14B24D3/06B22F7/00
Inventor 张凤林牛亮周玉梅黄惠平卢家锋
Owner GUANGDONG UNIV OF TECH
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