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Diamond grinding block and preparation thereof

A diamond and grinding block technology, which is applied in the field of diamond grinding block and preparation, can solve the problem of high cost and achieve the effects of low mold cost, good product consistency and cost reduction

Inactive Publication Date: 2009-04-15
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the cost of this grinding block is higher due to the use of a large amount of expensive metals such as cobalt and nickel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] To prepare 36# grinding blocks, proceed as follows:

[0024] 1. The matrix powder is ultra-fine pre-alloyed powder with a composition of Fe60Cu30Sn10, and diamond with a particle size of 100 / 120.

[0025] 2. Mix the carcass powder and diamond in proportion with a mixer, and the diamond content is 2.5%.

[0026] 3. Add 10g of starch, 15g of polyvinylpyrrolidone, 5g of polyacrylic acid, 3g of glycerin, and 3g of isooctyl alcohol into 1L of deionized water to prepare a non-toxic gel injection molding system premix. Then add 200ml of premix solution per kg of mixed material, and stir to make a slurry with suitable viscosity and good fluidity. Finally, inject the slurry into a plastic mold by using an injection molding machine, keep the temperature at 80° C. to 90° C. for 20 minutes, then cool to room temperature and dry for 48 hours to obtain the green block body.

[0027] 4. Keep the dried green body at 800°C for 60 minutes in a hydrogen atmosphere in a sintering furnace...

Embodiment 2

[0030] To prepare 60# grinding block, proceed as follows:

[0031] 1. The matrix powder is ultra-fine pre-alloyed powder with a composition of Fe50Cu35Sn15, and diamond with a particle size of 140 / 170.

[0032] 2. Mix the carcass powder and diamond single crystal in proportion with a mixer, and the diamond content is 4.0%.

[0033] 3. Add 20g of starch, 30g of polyvinylpyrrolidone, 10g of polyacrylic acid, 6g of glycerin, and 6g of isooctyl alcohol into 1L of deionized water to prepare a non-toxic gel injection molding system premix. Then add 150ml of premix solution per kg of metal powder and diamond mixture, and stir to make a slurry with suitable viscosity and good fluidity. Finally, use a pressure injection machine to inject the slurry into the plastic mold, keep it warm at 80°C to 90°C for 20 minutes, then cool to room temperature and dry for 36 hours to obtain the green block body

[0034] 4. Keep the dried green body at 750°C for 50 minutes in a hydrogen atmosphere ...

Embodiment 3

[0037] To prepare 120# grinding blocks, proceed as follows:

[0038] 1. The matrix powder is ultra-fine pre-alloyed powder with a composition of Fe35Cu40Sn25, and diamond with a particle size of 230 / 270.

[0039] 2. Mix the carcass powder and diamond in proportion with a mixer, and the diamond content is 4.5%.

[0040] 3. Add 20g of starch, 30g of polyvinylpyrrolidone, 10g of polyacrylic acid, 6g of glycerin, and 6g of isooctyl alcohol into 1L of deionized water to prepare a non-toxic gel injection molding system premix. Then add 150ml of premix solution per kg of metal powder and diamond mixture, and stir to make a slurry with suitable viscosity and good fluidity. Finally, use a pressure injection machine to inject the slurry into the plastic mold, keep it warm at 80°C to 90°C for 20 minutes, then cool to room temperature and dry for 36 hours to obtain the green block body

[0041] 4. Keep the dried green body at 720°C for 30 minutes in a hydrogen atmosphere in a sinterin...

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Abstract

The invention provides a method for preparing a diamond grinding block, which belongs to the technical field of powder metallurgy metal base composite material. The method comprises the following steps: using Fe-Cu-Sn superfine prealloyed powder and low grade diamond as raw materials, using a nontoxic gel injection mold forming technology and a low temperature pressureless sintering technology to prepare tool bits, and then adhering the tool bit by using epoxy resin to assemble the tool bits together so as to obtain a high performance diamond grinding block which is applied to the stone materials and ceramics polishing production line. The method has the advantages of no noble metals such as Co, Ni and the like, low cost, low sintering temperature for the tool bits, small thermal damage to the diamond, good grinding and polishing effect, long service life, and good product consistency, environmental protection and no pollution.

Description

technical field [0001] The invention relates to a diamond abrasive block and a preparation method thereof, belonging to the technical field of powder metallurgy metal-based composite materials. Background technique [0002] Grinding block is one of the main tools used in ceramic and stone polishing lines. Its function is to grind and polish polished tiles, which can be divided into rough grinding, fine grinding and fine grinding. At this stage, most of the ordinary grinding blocks used in ceramic and stone polishing lines are made of silicon carbide-magnesium chloride cement composite materials. The grinding efficiency and wear resistance are very poor, and the average life span is only 2 hours. Many, environmental pollution, weak cutting force and other shortcomings. [0003] At present, most of the diamond grinding blocks produced in my country are made of metal powder and diamond single crystal, which are sintered and compacted by high temperature hot pressing. For exam...

Claims

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Application Information

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IPC IPC(8): B24D3/10B24D18/00
Inventor 罗骥王振明邵慧平郭志猛赵文东王刚郝俊杰林涛杨薇薇
Owner UNIV OF SCI & TECH BEIJING
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