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Preparation method of boron carbide powder for grinding liquid

A technology of boron carbide powder and grinding liquid, which is applied in the field of materials, can solve the problems of poor quality of boron carbide powder, and achieve the effects of reducing grinding costs, fast grinding speed, and high flatness

Active Publication Date: 2016-07-20
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a brand-new and efficient preparation method of boron carbide powder for grinding liquid. First, select a specific boron carbide raw material, and after crushing, go through secondary or tertiary grading to obtain multiple powders for grinding liquid. Different types of high-quality boron carbide powder to solve the problem of poor quality boron carbide powder used in existing grinding liquids and improve the grinding effect

Method used

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  • Preparation method of boron carbide powder for grinding liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The boron carbide raw material is crushed with a Raymond mill to a particle size of 30-120mm to obtain boron carbide scraps;

[0051] The boron carbide scraps were pickled until the weight content of Fe was less than or equal to 1%, dried to remove moisture, and then the first-level wind classification and the second-level vibratory screening were carried out. A total of four groups of experiments were carried out; among them, the speed of the classification wheel during the first-level wind classification It is 300~1000r / min. After the first-level wind classification, four groups of first-level wind-classified materials with particle sizes of 50-90mm, 60-100mm, 70-110mm and 80-130mm are obtained. After the second-level vibratory screening, the particle size is 58~ Four groups of secondary vibration grading materials of 72mm, 68~83mm, 76~104mm and 94~122mm, the secondary vibration grading materials are used as low-grade abrasives of boron carbide powder for grinding liqu...

Embodiment 2

[0060] (1) The weight purity of boron carbide raw material is 96%, according to the atomic ratio B:C=4.2;

[0061] (2) Use a ball mill to crush the boron carbide raw material to a particle size of 30-120 mm to obtain boron carbide scraps; when the ball mill is crushed, the boron carbide raw material: water: steel ball = 1:2:1, and the ball milling time is 6 hours;

[0062] (3) Pickling boron carbide scraps until the weight content of Fe is ≤1%, drying to remove water, and then performing primary vibration screening, secondary sedimentation water separation and secondary drying, a total of four sets of experiments were carried out; primary vibration After sieving, four groups of primary vibration grading materials with particle sizes of 50~90mm, 60~100mm, 70~110mm and 80~130mm are obtained. And 100~120mm four groups of secondary sedimentation water separation materials, the secondary sedimentation water separation materials are dried to remove water after secondary drying, and ...

Embodiment 3

[0073] (1) The weight purity of boron carbide raw material is 97%, according to the atomic ratio B:C=4.3;

[0074] (2) When the ball mill is crushed, the boron carbide raw material: water: steel ball = 1:0.2:0.1 by weight, and the ball milling time is 10h;

[0075] (3) The primary vibration screening time is 3 hours;

[0076] (4) Among them, microwave pickling is used for pickling, the boron carbide scraps are placed in the acid solution, the temperature is controlled at 150°C, and the microwave frequency is 2000MHz; the acid solution used is hydrochloric acid solution, and the acid solution and boron carbide scraps The solid-to-liquid ratio is 1:10g / L, the weight concentration of hydrochloric acid is 20%, and the pickling time is 3h;

[0077] (5) The drying temperature of normal pressure drying is 300°C, and the drying time is 6 hours;

[0078] (6) In the secondary sedimentation water separation, first prepare a slurry with a weight concentration of 10%, then add a dispersa...

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Abstract

The invention provides a preparation method of boron carbide powder for grinding liquid. The preparation method comprises the following steps: (1) preparing a boron carbide raw material with the weight purity of 95 percent to 99 percent, wherein the volume percent ratio of needle-shaped crystals to flat crystals is smaller than or equal to 1 percent; (2) crushing the boron carbide raw material to obtain crushed boron carbide materials; (3) carrying out first-grade wind power grading and second-grade vibration sieving or carrying out primary vibration sieving, second-grade sedimentation and water selection, and second-grade drying to obtain a low-grade grinding material of the boron carbide powder for the grinding liquid; or carrying out multi-grade sieving and water selection to obtain high-grade micro-powder of the boron carbide powder for the grinding liquid. When the product prepared by the method is prepared into the grinding liquid for grinding, the grinding speed is rapid, and the flatness of a ground surface is high, so that the grinding cost of the product is greatly reduced.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a preparation method of boron carbide powder for grinding liquid. Background technique [0002] With the advancement of science and technology, grinding and polishing, as an important means of ultra-precision machining, are more and more widely used in engineering ceramics, optical glass, optoelectronic crystals, precision optics and other devices. Grinding and polishing have become an influence and even determine the product The key process of quality; grinding is the previous process of polishing, which directly affects the subsequent polishing efficiency and the surface quality of the workpiece; there are two main methods of grinding: (1) fixed abrasive grinding; (2) free abrasive grinding. [0003] As a kind of free abrasive grinding, the abrasive liquid has been widely used for its high efficiency and cleanness; according to different abrasives, the abrasive liquid can be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/36C09K3/14
CPCC01P2004/60C09K3/1409
Inventor 邢鹏飞李欣高帅波王帅李盼都兴红付念新李大纲曹宝胜
Owner NORTHEASTERN UNIV
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