Structural and Morphological Control Method of Magnetic Abrasives Prepared by Gas Atomization Rapid Solidification

A technology of magnetic abrasives and control methods, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of difficult to control the particle size of hard abrasives, low content of ceramic hard abrasives, and incomparable grinding ability. The effect of enhanced, high permeability, and improved processing efficiency

Inactive Publication Date: 2011-12-14
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current problem of the reaction casting method is that the content of ceramic hard abrasive in the magnetic abrasive is low and the particle size of the hard abrasive is difficult to control
Although this method solves the problem of poor compatibility between the iron-based phase and the abrasive phase, the magneti...

Method used

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  • Structural and Morphological Control Method of Magnetic Abrasives Prepared by Gas Atomization Rapid Solidification
  • Structural and Morphological Control Method of Magnetic Abrasives Prepared by Gas Atomization Rapid Solidification
  • Structural and Morphological Control Method of Magnetic Abrasives Prepared by Gas Atomization Rapid Solidification

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Experimental program
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Effect test

Embodiment 1

[0051] Embodiment 1: the magnetic abrasive material prepared by gas atomization fast setting method

[0052] The melting temperature of the metal body and the injection pressure of the mixed powder airflow are all within the parameter control range. The obtained magnetic abrasive has a regular spherical shape, and the hard abrasive is evenly distributed on the superficial layer of the metal body and firmly combined with the metal body. figure 2 , attached image 3 , attached Figure 4 , attached Figure 5 The structural morphology shown.

[0053] attached figure 2 , attached image 3 It shows that under the appropriate control parameters, the magnetic abrasive has a spherical structure, the hard abrasive is evenly distributed on the surface of the ferromagnetic metal body, the cutting edge protrudes outside, and the distance between the outermost cutting edge and the surface of the metal body is basically the same.

[0054] attached Figure 4 It is shown that the hard ...

Embodiment 2

[0057] The cross-sectional view of the morphology and structure of the magnetic abrasive prepared by the atomization quick-setting method under ideal process parameters is shown in the attached figure 1 shown. Embodiment 2: The impact of metal body melting temperature change on the morphology and structure of the prepared magnetic abrasive

[0058] (1) The injection pressure of the mixed powder airflow is moderate, and when the melting temperature of the metal body exceeds its melting point of 300°C, the shape of the magnetic abrasive is still a regular spherical shape, but due to the long cooling and solidification time, too much hard abrasive is free from the metal body And part of it falls off, making the combination of hard abrasive and metal body not firm enough, showing as attached Figure 6 The structural morphology shown.

[0059] (2) The injection pressure of the mixed powder airflow is moderate, and the melting temperature of the metal body is only 40°C higher than...

Embodiment 3

[0060] Example 3: The impact of the powder mixing air jet pressure change on the morphology and structure of the prepared magnetic abrasive

[0061] (1) The melting temperature of the metal body is moderate, and when the injection pressure of the powder-mixing airflow is as high as 4.0 MPa, the prepared magnetic abrasive is not only small, but also the combination of the hard abrasive and the metal body is not firm because the injection speed of the powder-mixing airflow is too high. Figure 8 The structural morphology shown.

[0062] (2) The melting temperature of the metal body is moderate, and when the injection pressure of the powder mixing airflow is only 0.5 MPa, the ferromagnetic metal cannot be atomized well because the injection speed of the powder mixing airflow is too low, and the formed magnetic abrasive is not only coarse, but not spherical , and the hard abrasive particles are only distributed on the surface of the metal body, and the combination with the metal b...

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Abstract

The invention relates to a method for controlling the structure and shape of magnetic abrasives prepared by a gas atomization quick-setting method. By controlling the melting temperature of the ferromagnetic metal at 50-280° C. above the melting point of the corresponding ferromagnetic metal and controlling the injection velocity of the powder-mixing airflow at 0.7-3.0 MPa, the obtained magnetic abrasive has a regular spherical structure. Its hard abrasive is evenly distributed on the superficial layer of the metal body and is firmly combined with the metal body for a longer service life. Hard abrasive particles are mainly distributed in the superficial layer of the ferromagnetic metal body, only a small amount is distributed in the center of the metal body, and almost not distributed in the middle layer between the superficial layer and the center. The cutting edge of the hard abrasive protrudes outside, and the outermost cutting edge is of equal height to the surface of the metal body; it has a strong ability to grind the workpiece to be processed, and can also significantly improve the processing quality of the surface of the workpiece to be processed; guide The high magnetic rate significantly enhances the grinding ability of the processed workpiece and improves the processing efficiency.

Description

technical field [0001] The invention relates to a magnetic abrasive used for magnetic grinding, in particular to a method for controlling the structure and shape of the magnetic abrasive prepared by a gas atomization quick-setting method. Background technique [0002] Magnetic grinding and finishing technology is a new finishing process developed by applying magnetic field to traditional grinding technology; it is an excellent finishing method; it is an effective technical means to improve the surface quality of products. This method has many technical advantages: flexibility, self-adaptability, self-sharpening, controllability, small temperature rise, no need for tool wear compensation, no need for shape modification, etc. Complicated requirements, it can realize the grinding and finishing of three-dimensional complex curved surfaces and solve automation problems; and it can reduce the manufacturing cost of parts, which has caused extensive research at home and abroad. The...

Claims

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Application Information

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IPC IPC(8): C09K3/14B22F9/08
Inventor 赵玉刚赵增典张桂香
Owner SHANDONG UNIV OF TECH
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