Method for manufacturing boron-containing diamond compact

A technology of boron diamond and composite sheet, which is applied in the field of preparation of superhard materials, can solve the problems of difficult to stabilize the quality of boron-containing diamond composite sheet, different degree of uniformity, and poor stability of boron-containing diamond, so as to improve comprehensive performance and anti-oxidation Sexual improvement, high density effect

Active Publication Date: 2017-05-31
CR GEMS SUPERABRASIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the different uniformity of the boron-containing binder mixture in this method, or the poor stability of the added boron-containing diamond itself, it is easy to cause the quality of the boron-containing diamond composite sheet to be difficult to stabilize, making the final boron-containing diamond composite sheet. The strength, Wear resistance, impact resistance and stability are only about 50% of ordinary synthetic diamond composite sheets, which restricts its application in some fields with high performance requirements

Method used

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  • Method for manufacturing boron-containing diamond compact

Examples

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Effect test

Embodiment 1

[0041] The binding agent that adopts in the present embodiment comprises following raw material components and parts by weight:

[0042] Co powder 97 parts by weight

[0043] TiC powder 2 parts by weight

[0044] 1 part by weight of Ni powder.

[0045] In this example:

[0046] In step 1), the concentration of the boric acid aqueous solution is 3%.

[0047] In step 1), the mass volume ratio of the diamond powder and the boric acid aqueous solution is 500g / L.

[0048] In step 2), the drying temperature is 200°C.

[0049] The mass ratio of diamond micropowder and binding agent is 1 in step 3).

[0050] In step 4), the cemented carbide substrate is WC-Co cemented carbide.

[0051] In step 4), the high temperature is 1400° C., and the high pressure is 7.5 MPa.

[0052] In this embodiment, the thickness of the boron-containing diamond layer is 0.5-1.5 mm; the thickness of the cemented carbide matrix layer is 5-10 mm.

Embodiment 2

[0054] The binding agent that adopts in the present embodiment comprises following raw material components and parts by weight:

[0055] Co powder 98 parts by weight

[0056] TiC powder 0.5 parts by weight

[0057] Ni powder 1.5 parts by weight.

[0058] In this example:

[0059] In step 1), the concentration of the boric acid aqueous solution is 10%.

[0060] In step 1), the mass volume ratio of the diamond powder to the boric acid aqueous solution is 600g / L.

[0061] In step 2), the drying temperature is 300°C.

[0062] The mass ratio of diamond micropowder and bonding agent is 2 in step 3).

[0063]In step 4), the cemented carbide substrate is WC-Co cemented carbide.

[0064] In step 4), the high temperature is 1500° C., and the high pressure is 6 MPa.

[0065] In this embodiment, the thickness of the boron-containing diamond layer is 0.5-2.5 mm; the thickness of the cemented carbide matrix layer is 5-10 mm.

Embodiment 3

[0067] The binding agent that adopts in the present embodiment comprises following raw material components and parts by weight:

[0068] Co powder 99 parts by weight

[0069] TiC powder 0.5 parts by weight

[0070] Ni powder 0.5 parts by weight.

[0071] In this example:

[0072] In step 1), the concentration of the boric acid aqueous solution is 15%.

[0073] In step 1), the mass volume ratio of the diamond powder to the boric acid aqueous solution is 700g / L.

[0074] In step 2), the drying temperature is 400°C.

[0075] The mass ratio of diamond micropowder and bonding agent is 3 in step 3).

[0076] In step 4), the cemented carbide substrate is WC-Co cemented carbide.

[0077] In step 4), the high temperature is 1600° C., and the high pressure is 7 MPa.

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Abstract

The invention discloses a method for manufacturing a boron-containing diamond compact. The method comprises the steps as follows: (1) diamond powder is soaked in a boric acid aqueous solution; (2) soaked diamond micro-powder is dried; (3) dried diamond micro-powder is evenly mixed with a binding agent; (4) the diamond micro-powder mixed with the binding agent is combined with a hard alloy matrix to form a synthetic block; (5) the synthetic block is placed in a special press for diamond for high-temperature and high-pressure treatment at the high temperature of 1,400-1,650 DEG C and under the high pressure of 5-7.5 MPa. With the method, the phenomenon of uneven boron containing or local accumulation in mixtures due to other methods is avoided, and more sufficient crystallization is realized through pretreatment, so that the strength, the wear resistance, the impact resistance, the heat resistance and the oxidation resistance of a diamond layer are further improved.

Description

technical field [0001] The invention relates to a method for preparing a superhard material, in particular to a method for manufacturing a boron-containing diamond composite sheet. Background technique [0002] Although diamond material has high hardness, it is difficult to process and has poor heat resistance during welding. Compared with ordinary diamond composite sheets, boron-containing diamond composite sheets have great advantages in wear resistance, heat resistance, impact resistance, and electrical conductivity. [0003] In the prior art, boron-containing diamond compacts mostly use a variety of additives including boron powder to mix with ordinary artificial diamond powder, or use boron-containing diamond powder to mix with ordinary artificial diamond powder and then add a small amount of other binders. It is sintered with cemented carbide substrate by high temperature and high pressure. For example, the invention patent with application number 200910048492.0 disc...

Claims

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Application Information

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IPC IPC(8): B22F7/04B22F5/00B22F7/08B22F1/00C22C19/07C22C26/00C22C29/08
CPCB22F1/0003B22F5/00B22F7/04B22F7/08B22F2005/001B22F2007/042C22C19/07C22C26/00C22C29/067C22C29/08
Inventor 温简杰崔祥仁方啸虎
Owner CR GEMS SUPERABRASIVES
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