Polycrystalline diamond composite sheet preparation process

A polycrystalline diamond and preparation process technology, which is applied in the field of preparation of polycrystalline diamond composite sheets, can solve the problems of low production efficiency, unsuitable for large-scale production, complicated production procedures, etc., so as to improve work efficiency, improve single-pass conversion rate and Product yield, overcoming the effect of many processes

Inactive Publication Date: 2016-06-08
吕艳
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Problems solved by technology

In the current preparation process of polycrystalline diamond compacts, the process is not easy to implement, the resulting diamond products have low hardness, low adaptability to the formation of reactants, complicated production procedures, low production efficiency and high cost, and are not suitable for large-scale production.

Method used

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Experimental program
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Embodiment

[0011] The preparation process of the polycrystalline diamond composite sheet of the present embodiment comprises the following steps:

[0012] (1) Ball mill the graphite-wrapped nano-cobalt powder and diamond micro-powder for 700 minutes, mix them evenly, and place them in a vacuum drying oven at 100°C for later use;

[0013] (2) Weigh 2.0g of the above-mentioned mixed diamond micropowder and cemented carbide substrate after compaction and assembly, place it in a pyrophyllite synthetic mold, and put it into a six-sided top diamond press;

[0014] (3) Synthesize for 9 minutes at a pressure of 5.9GPa and a temperature of 1650°C, take out the sample after decompression, and obtain a wear-resistant polycrystalline diamond composite sheet by mechanical polishing.

[0015] The preparation process of the polycrystalline diamond composite sheet does not require tedious post-reaction treatment, greatly improves the product performance, and is environmentally friendly and pollution-fre...

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PUM

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Abstract

The present invention discloses a polycrystalline diamond composite sheet preparation process. According to the present invention, a nanometer catalytic and high-temperature and high-pressure gradient synthesis technology is used; the particle size ratio of the raw material diamond and the catalysis and synthesis process are adjusted to regulate the microstructure and the composition of PDC so as to achieve the regulation and the optimization on the functions of the PDC composite sheet, such that the PDC is further subdivided into three types such as the anti-impact PDC, the wear-resistant PDC and the high-temperature-resistant PDC from the performance so as to obtain the three functional PDC, achieve the functional subdividing on the current market products, and meet the functional requirements of the drilling tool cutting teeth on different working conditions and geological microenvironments; and the stratum adaptability and the performance price ratio of the drilling bit can be significantly improved, the drilling efficiency and drilling bit service life can achieve rational balance, the performances of the PDC can be well provided, and the hard alloy resources can be saved.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a preparation process of a polycrystalline diamond composite sheet. Background technique [0002] Diamond is commonly known as "diamond diamond". Pure diamonds are also called diamonds. Diamond is a natural mineral and the original stone of diamonds. Diamond is a kind of elemental crystal composed of carbon element formed in the deep earth under high pressure and high temperature conditions. In diamond crystals, carbon atoms are connected to each other by tetrahedral bonding to form an infinite three-dimensional framework, which is a typical atomic crystal. In the current preparation process method of polycrystalline diamond composite sheet, the process flow is not easy to implement, the hardness of the resulting diamond product is low, the adaptability of the reactant formation is low, the production process is complicated, the production efficiency is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J3/06
Inventor 吕艳
Owner 吕艳
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