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Silicon carbide high-speed binder grinding wheel

A technology of bonding agent and silicon carbide, which is applied in the direction of abrasive materials, metal processing equipment, grinding devices, etc., can solve the problems of sintered bond fluidity, poor reaction ability at high temperature and wettability, poor grinding efficiency of sintered bond, and silicon carbide grinding wheel line. Low speed and other problems, to achieve the effect of good high-temperature wet performance, improved grinding efficiency, and increased abrasive particle rate

Inactive Publication Date: 2010-06-16
沈阳科锐特砂轮有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the poor fluidity, reaction ability and high temperature wettability of the sintered bond, the bond strength of the grinding wheel formed by it is low, resulting in a low linear speed of the silicon carbide grinding wheel.
[0006] The hardness of the existing silicon carbide sintered bond grinding wheel is not easy to stabilize, and the fluctuation of raw material quality and firing temperature can have a significant impact on the quality of the grinding wheel. When it is low, the hardness of the grinding wheel may be softer by 1-2 grades, or more, resulting in inconsistent hardness and becoming a substandard product
[0007] The grinding efficiency of sintered bond is poor and it is easy to burn the workpiece, and the grinding with high processing technology requirements can no longer meet the requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Accurately weigh 100 parts of abrasive black silicon carbide (C60), 20 parts of high-speed binder, 3 parts of dextrin, and 2.5 parts of water according to the formula. Then mix it into a molding material according to the mixing process, and mix the prepared raw materials in the order of abrasive + water + (binder + dextrin). Then, the mixture made in the raw material mixing process is pressed with a press to form grinding wheel blanks of various shapes required. After the grinding wheel blank is pressed, it is pushed into the drying room for drying at a drying temperature of 90-100°C. After drying, it is placed in a kiln for roasting at a temperature of 1200-1300°C, and then cooled to room temperature for processing. Then go to the inspection station, conduct a full inspection according to the inspection requirements, and leave the factory only after meeting the current national standards.

Embodiment 2

[0032] 100 parts of abrasive green silicon carbide (GC80), 16 parts of high-speed binder, 3 parts of dextrin, and 2.8 parts of water are accurately weighed according to the formula, and then mixed according to the mixing process of abrasive + water + (bonding agent + dextrin) to form a mold material. Use a press to press the rough grinding wheel according to the specifications and sizes required by the user; after the grinding wheel blank is pressed, it is pushed into the drying room for drying at a drying temperature of 90-100°C. After drying, it is placed in a kiln for roasting at a temperature of 1200-1300°C . After firing, cool to room temperature for processing. Then transfer to the inspection station, conduct a full inspection according to the inspection requirements, and leave the factory only after meeting the current national standards.

Embodiment 3

[0034] Accurately weigh 100 parts of abrasive green silicon carbide (GC150), 28 parts of high-speed binder, 2 parts of dextrin, and 5 parts of water according to the formula. Then mix it into a molding material according to the mixing process of abrasive + water + (bonding agent + dextrin), and press it into a rough size with a press according to the size required by the user. After the grinding wheel blank is pressed, it is pushed into the drying room for drying at a temperature of 90-100°C. After drying, it is placed in a kiln for roasting at a temperature of 1200-1300°C. After firing, cool to room temperature for processing. Then transfer to the inspection station, conduct a full inspection according to the inspection requirements, and leave the factory only after meeting the current national standards.

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Abstract

The invention provides a silicon carbide high-speed binder grinding wheel, which comprises a grinding wheel binder and an abrasive, wherein the abrasive is black silicon carbide (C) or green silicon carbide (GC) at least. The grinding wheel is characterized in that the grinding wheel binder is a high-speed binder, and the weight percentages of chemical components of the high-speed binder are: 15 to 23 percent of Al2O3, 58 to 68 percent of SiO2, 3 to 6 percent of K2O, less than 2 percent of Na2O, less than 2 percent of MgO, less than 0.6 percent of CaO, less than 1 percent of Fe2O3 and less than 2 percent of B2O3. The invention changes the type of the binder from a sintered type binder into a semi-fused type binder and particularly introduces low-melting boron glass into the binder, thereby reducing the refractoriness of the binder, improving the strength of the grinding wheel, achieving the aim of raising the linear velocity of the grinding wheel and not causing the silicon carbide grinding wheel to produce black-heart foamed waste in the sintering process.

Description

technical field [0001] The invention relates to a silicon carbide grinding wheel, in particular to a silicon carbide high-speed bond grinding wheel, which belongs to the grinding wheel manufacturing technology. Background technique [0002] The linear speed of the existing silicon carbide grinding wheel is generally 35m / s, which can meet the grinding requirements when used on domestic grinding machines. The bonding agent used in the existing silicon carbide grinding wheel is a sintered bonding agent. The main feature of the sintered binder is that the liquid phase formed during firing only accounts for a part, and there are many crystals in the microstructure, which belongs to the multi-phase system. [0003] Commonly used raw materials for sintered binders are clay, feldspar, quartz, and sometimes a small amount of talc is added. The approximate fluctuation range of its chemical composition is: SiO 2 55-71%, Al 2 o 3 17-22%, Fe 2 o 3 0.2-1.5%, MgO 0.5-2.5%, K 2 O+Na ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24D3/04B24D18/00
Inventor 叶桂英王统洲战世信王爱民周岩张继勇杨朝斌
Owner 沈阳科锐特砂轮有限责任公司
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