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Superhard magnetic abrasive particles and preparation method thereof

A technology of magnetic abrasive grains and ultra-hardness, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of easy shedding of abrasive grains, poor thermal stability, poor bonding, etc., and achieve good processing results

Inactive Publication Date: 2018-10-02
XIAN SIYUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the bonding method is simple in process, easy to implement, and low in cost, it has loose structure, poor bonding, low density, poor thermal stability, easy to fall off the abrasive grain phase, and short life. Abrasives make the processed surface dark black, and the original processed surface is easily polluted and damaged, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A superhard magnetic abrasive grain of this embodiment, the superhard magnetic abrasive grain is made of abrasive material, magnetic material and binder through stirring, bonding, solidification, crushing, and screening, and the magnetic material is Fe 3 o 4 Nanoparticles and SiO 2 mixture of particles, the abrasive material being Al 2 o 3 Particles, the binder is epoxy resin, and the diameter of the superhard magnetic abrasive particles obtained is 36nm.

[0020] In addition, the present invention also provides a preparation method of superhard magnetic abrasive grains, comprising the following steps:

[0021] Inorganic iron salt FeCl 3 ·6H 2 O, 0.2 grams, 1 mole dissolved in 20ml of water as a precursor, take 30ml of hydrazine as a surfactant liquid, put it in a stainless steel reaction kettle, and keep it for about 25 minutes under the condition of an alkaline solution below 200°C. Synthesis of liquid Fe 3 o 4 , then liquid Fe will be produced 3 o 4 Mix it ...

Embodiment 2

[0025] A superhard magnetic abrasive grain of this embodiment, the superhard magnetic abrasive grain is made of abrasive material, magnetic material and binder through stirring, bonding, solidification, crushing, and screening, and the magnetic material is Fe 3 o 4 Nanoparticles and SiO 2 mixture of particles, the abrasive material being Al 2 o 3 Mixed particles with SiC, the binder is epoxy resin, and the diameter of the superhard magnetic abrasive particles is 1000nm.

[0026] In addition, the present invention also provides a preparation method of superhard magnetic abrasive grains, comprising the following steps:

[0027] Step 1, take inorganic iron salt FeCl 2 4H 2O, 0.2 grams, 1 mole is dissolved in 20ml of water as a precursor, and one of hydrazine, polyethylene glycol, and PVP is used as a surfactant liquid 30ml, placed in a stainless steel reaction kettle, at a temperature lower than 200°C Under the condition of alkaline solution, keep it for about 25 minutes to...

Embodiment 3

[0031] A superhard magnetic abrasive grain of this embodiment, the superhard magnetic abrasive grain is made of abrasive material, magnetic material and binder through stirring, bonding, solidification, crushing, and screening, and the magnetic material is Fe 3 o 4 Nanoparticles and SiO 2 mixture of particles, the abrasive material being Al 2 o 3 Mixed particles with SiC, the binder is epoxy resin, and the diameter of the superhard magnetic abrasive particles obtained is 70nm.

[0032] In addition, the present invention also provides a preparation method of superhard magnetic abrasive grains, comprising the following steps:

[0033] Step 1, get organic iron salt pentapentyl iron (CH 5 Fe) 0.465 g, 2.5 moles dissolved in 30 ml of ammonia water as a precursor, take PVP as a surfactant liquid 30 ml, put it in a stainless steel reaction kettle, and keep it for about 25 minutes under the condition of an alkaline solution below 200 ° C, that is Synthetic Liquid Fe 3 o 4 , the...

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Abstract

The invention discloses superhard magnetic abrasive particles and a preparation method thereof. The superhard magnetic abrasive particles are prepared from abrasive materials, a magnetic material andan adhesive through stirring and bonding, solidifying, crushing and screening, wherein the magnetic material is a mixture of Fe3O4 nanoparticles and SiO2 particles; the abrasive materials are Al2O3 particles or mixed particles of Al2O3 and SiC; and the diameter of the prepared superhard magnetic abrasive particles is 36 nm or 1000 nm. Compared with the prior art, the superhard magnetic abrasive particles prepared by a bonding process method has high magnetic polishing processing performance and is applied to magnetic grinding of mold steel; the original surface Ra 1.87 um can be reduced to about Ra 0.4 um through processing for 4 minutes; and a good processing effect is achieved.

Description

technical field [0001] The invention relates to the field of magnetic abrasive materials, in particular to superhard magnetic abrasive grains and a preparation method thereof. Background technique [0002] Magnetic Abrasive Finishing (MAF for short) processing technology is a new process and new technology for finishing processing. It uses the external magnetic force acting between the abrasive tool and the workpiece to attract magnetic abrasive particles to form a "flexible magnetic brush" to improve the surface quality of the workpiece. [0003] In high-precision surface grinding, this method has better flexibility, self-adaptability, self-sharpening and controllability. It has the characteristics of small temperature rise, no metamorphic layer, high processing quality, high efficiency, and no need for wear compensation and modification of tools. It is widely used in manufacturing industries such as machinery, molds, automobiles, bearings, semiconductors, and aviation. Ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/14
CPCC09K3/1427
Inventor 杨宏伟杨燕赵辉王鹞张丽芝王晓银
Owner XIAN SIYUAN UNIV