Self-sharpening polycrystalline diamond compact and preparation method thereof

A technology of polycrystalline diamond and composite sheet, which is applied in the application of ultra-high pressure process, etc., can solve problems such as delamination and easy cracking of diamond composite sheet, and achieve the effects of improving uniformity, self-sharpening and high efficiency

Inactive Publication Date: 2014-04-16
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a diamond composite sheet with good self-sharpening and uniform

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The self-sharpening polycrystalline diamond compact of the present embodiment: comprises a tungsten-cobalt cemented carbide cylinder and a polycrystalline diamond polycrystalline layer, and the polycrystalline diamond polycrystalline layer includes 60% of diamond micropowder with a particle size of 0.5 μm and 40% of the binder, the binder is metal cobalt and titanium nitride composite binder, wherein metal cobalt accounts for 11% of the polycrystalline diamond polycrystalline layer, and titanium nitride accounts for 29% of the polycrystalline diamond polycrystalline layer.

[0024] The preparation method of the self-sharpening polycrystalline diamond composite sheet of the present embodiment:

[0025] (1) The self-sharpening diamond powder is treated with chemical acid and alkali, neutralized in deionized water, and then dried; the tungsten-cobalt cemented carbide cylinder is cleaned and dried with acetone after sandblasting to remove surface passivation, pollutants and ...

Embodiment 2

[0031] The self-sharpening polycrystalline diamond compact of the present embodiment: comprises tungsten-cobalt cemented carbide triangles and a polycrystalline diamond polycrystalline layer, and the polycrystalline diamond polycrystalline layer includes 95% of diamond micropowder with a particle size of 30 μm and 5 % binder, the binder is a composite binder of metal nickel and aluminum nitride, wherein metal nickel accounts for 7% of the polycrystalline diamond polycrystalline layer, and aluminum nitride accounts for 3% of the polycrystalline diamond polycrystalline layer.

[0032] The preparation method of the self-sharpening polycrystalline diamond composite sheet of the present embodiment:

[0033] (1) The self-sharpening diamond powder is treated with chemical acid and alkali, neutralized in deionized water, and then dried; the tungsten-cobalt cemented carbide triangle is cleaned and dried with acetone after sandblasting to remove surface passivation, pollutants and oxides...

Embodiment 3

[0039] The self-sharpening polycrystalline diamond compact of the present embodiment: comprises tungsten-cobalt cemented carbide triangles and a polycrystalline diamond polycrystalline layer, and the polycrystalline diamond polycrystalline layer includes 70% of diamond micropowder with a particle size of 10 μm and 30 % binder, the binder is a composite binder of metal molybdenum and titanium carbide, wherein metal molybdenum accounts for 11% of the polycrystalline diamond polycrystalline layer, and titanium carbide accounts for 19% of the polycrystalline diamond polycrystalline layer.

[0040] The preparation method of the self-sharpening polycrystalline diamond composite sheet of the present embodiment:

[0041] (1) The self-sharpening diamond powder is treated with chemical acid and alkali, neutralized in deionized water, and then dried; the tungsten-cobalt cemented carbide hexagon is cleaned and dried with acetone after sandblasting to remove surface passivation, pollutants ...

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Abstract

The invention discloses a self-sharpening polycrystalline diamond compact and a preparation method thereof. The self-sharpening polycrystalline diamond compact comprises a hard alloy base body and a polycrystalline diamond polycrystalline layer, wherein the polycrystalline diamond polycrystalline layer comprises 60-95% of diamond micro-powder and 5%-40% of binding agents, the binding agents are composite binding agents of metal and ceramics, the metal accounts for 1%-11% of the polycrystalline diamond polycrystalline layer, and the ceramics accounts for 1%-40% of the polycrystalline diamond polycrystalline layer, and the diamond micro-powder and the binding agents form the diamond compact respectively through chemical acid-base processing, physical vacuum processing, ball mill mixing, compression moulding and final high-temperature and high-pressure sintering. The diamond compact is good in self-sharpening, even in abrasive ratio and suitable for high-speed cutting machining and precise machining of non-black metal and geological prospecting.

Description

technical field [0001] The invention relates to the technical field of preparation of superhard composite cutting tools for cutting and milling, in particular to a self-sharpening polycrystalline diamond composite sheet and a preparation method thereof. Background technique [0002] If a worker wants to do good, he must first sharpen his tools. In metal cutting technology, improving cutting tool materials has more potential to improve cutting efficiency and reduce cutting costs than any other process changes. Therefore, in order to continuously improve production efficiency, reduce product costs, and enhance product competitiveness, industrially developed countries have We are vigorously carrying out the research and development of new cutting tool materials. Driven by this understanding, foreign new tool materials, new high-efficiency tool products and new tool manufacturing processes are constantly emerging. At present, the variety of superhard material cutting tools is ...

Claims

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Application Information

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IPC IPC(8): B22F7/04B01J3/06
Inventor 李启泉张旺玺蔡森刘磊
Owner ZHONGYUAN ENGINEERING COLLEGE
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