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Preparation method of nano cutting element iron-based magnetic fine polishing powder

A nano-cutting and iron-based powder technology, which is applied in metal processing equipment, transportation and packaging, etc., can solve the problems of low encapsulation force and unreasonable array, so as to improve enveloping force, solve the problem of unreasonable array, The effect of low setting force

Active Publication Date: 2020-06-30
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the present situation in the research and development field of low enclosing force and unreasonable array of cutting elements on the surface of iron-based powders, and provides a preparation method of nano-cutting element iron-based magnetic fine polishing powder

Method used

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  • Preparation method of nano cutting element iron-based magnetic fine polishing powder
  • Preparation method of nano cutting element iron-based magnetic fine polishing powder

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preparation example Construction

[0022] A kind of preparation method of nano-cutting element iron-based magnetic polishing powder of the present invention, comprises the following steps:

[0023] 1) Using cold air driven impact technology, the atomized iron powder with an average particle size of 130-210 microns will be impacted at a high speed on a honeycomb micro-involute mold with an effective inner diameter of 120-190 microns. The working temperature is 20-30 ° C, and the gas medium is air. The air velocity is 210-340 m / s, and at the same time, the mold is periodically vibrated at a frequency of 5-9 Hz to obtain double involute dent iron-based powder;

[0024] 2) Put the zirconia powder with an average particle size of 40-70 nanometers and the dispersant into the ammonium hydrogen phosphate solution at a mass ratio of 12-19:1, and then add double involute dent iron powder at a ratio of 50-110 g / L , the nano-powder is evenly arranged on the dent of the iron-based powder with a water-bath heat-collecting st...

Embodiment 1

[0027] 1) The atomized iron powder with an average particle size of 130 microns is used to impact the honeycomb micro-involute mold with an effective inner diameter of 120 microns at a high speed by using cold air-driven impact technology. The working temperature is 20°C, the gas medium is air, and the airflow speed is 210 m / s , while periodically vibrating the mold at a frequency of 5 Hz to obtain a double involute dent iron-based powder;

[0028] 2) Put the zirconia powder with an average particle size of 40 nanometers and the dispersant into the ammonium hydrogen phosphate solution at a mass ratio of 12:1, then add double involute dent iron powder at a ratio of 50 g / l, and stir in a water bath The device evenly arranges the nano-powder on the dent of the iron-based powder, the spindle speed of the stirring device is 450 rpm, the temperature of the water bath is 56°C, and then it is filtered with a silicon carbide fiber filter, washed with absolute ethanol, and dried at 55°C ...

Embodiment 2

[0032] 1) The atomized iron powder with an average particle size of 150 microns is used to impact the honeycomb micro-involute mold with an effective inner diameter of 140 microns at a high speed by using cold air-driven impact technology. The working temperature is 22°C, the gas medium is air, and the airflow speed is 230 m / s , while periodically vibrating the mold at a frequency of 6 Hz to obtain a double involute dent iron-based powder;

[0033] 2) Put the zirconia powder with an average particle size of 50 nanometers and the dispersant into the ammonium hydrogen phosphate solution at a mass ratio of 13:1, then add double involute dent iron powder at a ratio of 60 g / l, and stir in a water bath The device evenly arranges the nano-powders on the dents of the iron-based powders, the spindle speed of the stirring device is 470 rpm, the temperature of the water bath is 58°C, and then it is filtered with a silicon carbide fiber filter, washed with absolute ethanol, and dried at 55...

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Abstract

The invention discloses a preparation method of nanometer cutting element iron-based magnetic fine throwing powder. First, the atomized iron powder is impacted into a honeycomb micro-involute mold at a high speed by using cold air-driven impact technology, and the mold is vibrated at the same time, and then the obtained double involute The open-line dent iron powder, nano-zirconia powder and dispersant are put into the ammonium hydrogen phosphate solution, and the nano-powder is evenly arranged on the dent of the iron-based powder by a water-bath heat collecting and stirring device, and then filtered, washed, dried, and finally The nano zirconium dioxide is adhered to the iron-based powder for quenching treatment, and finally the nano-cutting element iron-based magnetic fine polishing powder is obtained. This method has high control precision of cutting element array, strong process stability and repeatability, and can realize high performance and long life of iron-based magnetic fine polishing powder.

Description

technical field [0001] The invention relates to the technical field of magnetic precision polishing powder preparation, in particular to a preparation method of nano cutting element iron-based magnetic fine polishing powder. Background technique [0002] The surface fine polishing of high-end optical glass and ultra-high-strength glass for navigation and aerospace is a key machining problem that determines the development of science and technology in related fields. Commonly used polycrystalline diamond and polycrystalline cubic boron nitride tools have high glass polishing accuracy, but it is difficult to eliminate the stress concentration on the polishing surface, which changes the surface properties of the glass, and the low self-sharpening of polycrystalline tools makes the polishing efficiency relatively low. Low and short lifespan. The cutting medium of magnetic fine polishing technology has high self-sharpening property, which can effectively replace polycrystalline ...

Claims

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Application Information

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IPC IPC(8): B22F1/00
CPCB22F1/065B22F1/14B22F1/142B22F1/054
Inventor 李文生张辛健成波范祥娟张杰
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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