Preparation method of iron-based magnetic grinding powder

A magnetic grinding and powder technology, which is applied in metal processing equipment, transportation and packaging, etc., can solve the problems of low grinding efficiency, low sphericity, weak magnetic force, etc., and achieve high processing performance, high efficiency and long life, and high control precision.

Active Publication Date: 2019-11-15
LANZHOU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0003] The present invention aims at the present situation in the field of research and development where common means are difficult to effectively solve the problems of weak magnetic force, low sphericity, low grinding efficiency and short service life of existing iron-based magnetic grinding powders, and provides a preparation method for iron-based magnetic grinding powders

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  • Preparation method of iron-based magnetic grinding powder
  • Preparation method of iron-based magnetic grinding powder

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preparation example Construction

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

[0023] 1) The reduced atomized iron powder with an average particle size of 140-270 microns is subjected to high-temperature oxygen spray pitting treatment, using argon-oxygen mixed gas as the high-temperature jet flow, the volume ratio of argon to oxygen is 3-6:1, and the air flow temperature is 350- 560°C, the air velocity and flow rate are 110-160 m / s and 330-520 ml / s respectively, and then placed in a slow cooling vibration device to remove iron oxide impurities, the vibration frequency is 5-9 Hz, and the cooling rate is 320-430 Cool the grate bed at ℃ per meter to obtain high-density surface pitting iron powder;

[0024] 2) Immerse the pentagonal and hexagonal carbon fiber screens with apertures of 425-500 microns, 375-455 microns, respectively, in 23% SBS-methanol mixed solution, and evenly adhere α-alumina powder with an average particle ...

Embodiment 1

[0027] 1) The reduced atomized iron powder with an average particle size of 140 microns is subjected to high-temperature oxygen spray pitting treatment, using argon-oxygen mixed gas as the high-temperature jet airflow, the volume ratio of argon to oxygen is 3:1, the airflow temperature is 350°C, and the airflow velocity is the same as The flow rates are 110 m / s and 330 ml / s respectively, and then placed in a slow cooling vibration device to remove iron oxide impurities, the vibration frequency is 5 Hz, and the cooling rate is 320 ° C per meter cooling grate bed to obtain high-density surface pitting iron pink;

[0028] 2) Immerse regular five- and hexagonal carbon fiber screens with pore diameters of 425 microns and 375 microns in 23% SBS-methanol mixed solution, and evenly adhere α-alumina powder with an average particle size of 375 microns on both sides, and then use a powder seeding device to make the dots The iron corrosion powder is evenly dispersed on the surface of the ...

Embodiment 2

[0031] 1) The reduced atomized iron powder with an average particle size of 160 microns is subjected to high-temperature oxygen spray pitting treatment, using argon-oxygen mixed gas as the high-temperature jet air flow, the volume ratio of argon to oxygen is 4:1, the air flow temperature is 400°C, and the air flow speed The flow rates are 120 m / s and 350 ml / s, respectively, and then placed in a slow cooling vibration device to remove iron oxide impurities. The vibration frequency is 6 Hz, and the cooling rate is 330 ° C per meter cooling grate bed to obtain high-density surface pitting iron pink;

[0032] 2) Immerse regular five- and hexagonal carbon fiber screens with pore diameters of 460 microns and 385 microns in 23% SBS-methanol mixed solution, and evenly adhere α-alumina powder with an average particle size of 385 microns on both sides, and then use a powder seeding device to make the dots Iron corrosion powder is evenly dispersed on the surface of the screen, the on-dem...

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Abstract

The invention discloses a preparation method of iron-based magnetic grinding powder. Firstly, high temperature oxygen injection pitting treatment is carried out on atomized iron powder; then annealingvibration is carried out to remove oxide impurities; a powder seeding device is used for uniformly dispersing iron powder on the surface of an alphas aluminum oxide lattice carbon fiber screen, and the screen is subjected to reciprocating vibrating to make the alumina adhere to the surface of the iron powder; and finally the powder is degreased, and finally the iron-based magnetic grinding powderimitating a C60 surface structure is obtained. The method has the advantages of being high in control precision of surface cutting element arrays and strong in process stability and repeatability, and being capable of achieving high-efficiency processing performance and long life of the iron-based magnetic grinding powder.

Description

technical field [0001] The invention relates to the technical field of magnetic grinding powder preparation, in particular to a preparation method of iron-based magnetic grinding powder. Background technique [0002] The precise grinding and polishing of non-axisymmetric or non-centrosymmetric industrial parts is one of the key problems in the field of machining, especially the deburring and grinding operation of the corners or inner surfaces of special-shaped parts is more difficult. Magnetic grinding method is an effective means to solve the above problems. However, the existing iron-based magnetic grinding powder has problems such as weak magnetic force, low sphericity, low grinding efficiency and short service life. Therefore, it is very important to find a new method to efficiently prepare iron-based magnetic grinding powder according to the design concept of surface lattice arrangement, and to improve its processing performance. Contents of the invention [0003] T...

Claims

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Application Information

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IPC IPC(8): B22F1/02
CPCB22F1/14B22F1/142B22F1/145B22F1/16
Inventor 李文生安国升冯力成波
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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