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Method for processing drilling hexagonal polycrystalline diamond

A polycrystalline diamond and processing method technology, applied in the application of ultra-high pressure process, etc., can solve the problems of polycrystalline diamond that is difficult to process into various shapes, low pass rate, etc., and achieve significant economic benefits, high pass rate, The effect of good thermal stability

Inactive Publication Date: 2012-07-04
ZHENGZHOU SANHE DIAMOND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to process polycrystalline diamonds of various shapes using existing techniques for synthesizing polycrystalline diamonds.
Even if various shapes can be produced, the pass rate is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The present invention drills with the processing method of hexagonal polycrystalline diamond, and the detailed steps of described processing method are as follows:

[0022] a, raw material composition: expressed in weight percent, the raw material adopted is composed of diamond powder 80%, silicon Si 3% and nickel Ni 17%;

[0023] 80% of the raw diamond powder is composed of W40, W20 and W5-7 diamond powder, of which the weight percentages of W40, W20 and W5-7 in the composition of the raw diamond powder are 40%, 35%, respectively. % and 25%;

[0024] B, according to the raw material composition described in step a, take by weighing raw material diamond powder, silicon and nickel, add the catalyst boron that accounts for 0.30% of raw material total amount in addition after mixing uniformly ， The mixed raw material and catalyst boron are packed into a hexagonal carbon synthesis mold, and then the carbon synthesis mold with raw materials and catalyst is placed in a vacuu...

Embodiment 2

[0029] The present invention drills with the processing method of hexagonal polycrystalline diamond, and the detailed steps of described processing method are as follows:

[0030] a. Raw material composition: represented by weight percentage, the adopted raw material is composed of diamond powder 82%, silicon Si 2% and nickel Ni 16%;

[0031] 82% of the raw diamond powder is composed of W40, W20 and W5-7 diamond powder, of which the weight percentages of W40, W20 and W5-7 in the composition of the raw diamond powder are 40%, 35%, respectively. % and 25%;

[0032] B, according to the raw material composition described in step a, take by weighing raw material diamond powder, silicon and nickel, add the catalyst boron that accounts for 0.28% of raw material total amount in addition after mixing uniformly ， The mixed raw material and catalyst boron are packed into the hexagonal carbon synthesis mold, and then the carbon synthesis mold with raw material and catalyst is placed in a...

Embodiment 3

[0037] The present invention drills with the processing method of hexagonal polycrystalline diamond, and the detailed steps of described processing method are as follows:

[0038] a, raw material composition: expressed in weight percentage, the raw material adopted is composed of diamond powder 78%, silicon Si 4% and nickel Ni 18%;

[0039] 78% of the raw diamond powder is composed of three kinds of diamond powders W40, W20 and W5-7, of which the weight percentages of W40, W20 and W5-7 in the composition of the raw diamond powder are 40%, 35%, respectively. % and 25%;

[0040] B, according to the raw material composition described in step a, take by weighing raw material diamond powder, silicon and nickel, add the catalyst boron that accounts for 0.32% of raw material total amount in addition after mixing uniformly ， The mixed raw material and catalyst boron are packed into the hexagonal carbon synthesis mold, and then the carbon synthesis mold with raw material and catalyst ...

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PUM

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Abstract

The invention discloses a method for processing drilling hexagonal polycrystalline diamond. The processing method of the invention comprises the following steps of: adding a certain amount of boron into basic raw materials including diamond powder, silicon and metal nickel; blending the raw materials including the diamond powder, the silicon and the nickel with the boron and adding the mixed materials into a carbon synthesizing mold; putting the carbon synthesizing mold into a vacuum furnace for heating under vacuum; placing the semi-finished product after the vacuum heating into a diamond hexagonal heading press for high-temperature and high-pressure synthesizing; and relieving pressure after the high-temperature and high-pressure synthesizing to obtain the product of drilling hexagonal polycrystalline diamond TSP of the invention. The polycrystalline diamond TSP prepared by the technical scheme of the invention has relatively high thermal stability, relatively high impact resistanceand high wear resistance and can meet the requirements of complicated substrate drilling completely; and the qualification rate of the product is as high as over 88 percent.

Description

technical field [0001] The invention relates to a processing method of polycrystalline diamond, in particular to a processing method of hexagonal polycrystalline diamond for drilling. Background technique [0002] Diamond polycrystalline PCD (Polycrystalline diamond) is sintered with fine-grain diamond single crystal under high temperature and high pressure. This product has good wear resistance, thermal stability, compressive strength and impact toughness, and is widely used in geological Exploration, oil extraction, natural gemstone processing industry and machining and dressing tools and other fields. At present, there are two types of synthetic diamond polycrystalline PCD and synthetic diamond polycrystalline TSP. The main shapes are triangular, regular hexagonal, long hexagonal, cylindrical, and arc-shaped at both ends. The diversification of its products is suitable for various drilling tools and geological requirements. [0003] At present, polycrystalline diamonds ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J3/06
Inventor 刘小选苏振岭
Owner ZHENGZHOU SANHE DIAMOND
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