Metal cup for conical or arc-shaped diamond composite sheet and preparation method thereof

A diamond composite sheet and metal cup technology, applied in the field of superhard material products, can solve the problems of easy adsorption of gas or impurities, low wear resistance, large specific surface area of ​​metal powder, etc., to improve product yield, improve stress distribution, Effect of improving wear resistance

Active Publication Date: 2019-01-29
河南亚龙金刚石制品股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Conical or arc-shaped PDC is mainly used for impact rock breaking, which requires it to have high impact resistance and is not easy to delaminate. In the current synthesis of conical or arc-shaped PDC, polycrystalline diamond parts generally adopt single-layer or multi-layer (transition layer added) powder filler and then pre-compressed and sintered. The PDC synthesized by this method has a large internal residual stress, poor impact resistance, and low wear resistance. At the same time, this method has the following problems: 1. Metal powder and diamond powder Segregation is easy to occur during mechanical mixing; 2. Density gradients are easy to occur when multi-layer powder is piled up and pre-pressed, and the uniformity of each layer of polycrystalline layer cannot be guaranteed; 3. Metal powder has a large specific surface area and is very easy to absorb gases or impurities
These problems greatly affect the catalytic effect of the catalyst

Method used

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  • Metal cup for conical or arc-shaped diamond composite sheet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A metal cup for a conical or arc-shaped diamond composite sheet, expressed in weight percentage, composed of the following alloy components: Ni: 15-20%, Cu: 5-10%, Al: 1-5%, Ti: 0.2 -1%, Si: 1-3%, W: 0.5-1.5%, and the balance is Co.

[0026] Expressed in weight percent, it consists of the following alloy components: Ni: 15%, Cu: 5%, Al: 1%, Ti: 1%, Si: 3%, W: 1.5%, and the balance is Co.

[0027] Expressed in weight percent, it consists of the following alloy components: Ni: 17.5%, Cu: 7.5%, Al: 3%, Ti: 0.6%, Si: 2%, W: 1%, and the balance is Co.

[0028] Expressed in weight percent, it consists of the following alloy components: Ni: 20%, Cu: 10%, Al: 5%, Ti: 1%, Si: 3%, W: 0.5%, and the balance is Co.

[0029] The alloy components are all powders with a mesh size of 600 or less.

[0030] Such as the preparation method of the metal cup for the above-mentioned conical or arc-shaped diamond composite sheet, the specific steps are as follows:

[0031] a. Weigh each allo...

Embodiment 2

[0040] A metal cup for conical or arc-shaped diamond composite sheet, expressed in weight percentage, composed of the following alloy components: Ni: 15%, Cu: 5%, Al: 1%, Ti: 0.2%, Si: 1% , W: 0.5%, the balance is Co.

[0041] The alloy components are all powders with a mesh size of 600 or less.

[0042] Such as the preparation method of the metal cup for the above-mentioned conical or arc-shaped diamond composite sheet, the specific steps are as follows:

[0043] a. Weigh each alloy component according to the weight percentage described in claim 1, place it in an intermediate frequency furnace for melting, the melting temperature is 1400°C, keep it for 15min after melting, and then cast it into an alloy ingot;

[0044] b, the alloy ingot obtained in step a is sent into a vacuum degree of 10 -3 Refining is carried out at 1450°C in a MPa high-vacuum melting furnace, during which argon gas is introduced for protection, and it is kept for 20 minutes after melting, and then cast...

Embodiment 3

[0052] A metal cup for conical or arc-shaped diamond composite sheet, expressed in weight percentage, composed of the following alloy components: Ni: 15.5%, Cu: 5.5%, Al: 1.4%, Ti: 0.25%, Si: 1.2% , W: 0.6%, the balance is Co.

[0053]The alloy components are all powders with a mesh size of 600 or less.

[0054] Such as the preparation method of the metal cup for the above-mentioned conical or arc-shaped diamond composite sheet, the specific steps are as follows:

[0055] a. Weigh each alloy component according to the weight percentage described in claim 1, place it in an intermediate frequency furnace for melting, the melting temperature is 1410°C, keep it for 16min after melting, and then cast it into an alloy ingot;

[0056] b. Sending the alloy ingot obtained in step a into a vacuum degree of 2×10 -3 Refining is carried out at 1460°C in a high vacuum melting furnace of MPa, during which argon gas is introduced for protection, and it is kept for 21 minutes after melting, ...

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Abstract

The invention discloses a metal cup for a tapered or arc-shaped diamond composite sheet. The metal cup consists of the following alloy components in percentage by weight: 15-20% of Ni, 5-10% of Cu, 1-5% of Al, 0.2-1% of Ti, 1-3% of Si, 0.5-1.5% of W and the balance of Co. Compared with the prior art, the metal cup has the advantages that: firstly, the metal cup replaces conventional powdered catalyst, purity and stability of the metal cup are higher than those of the powdered catalyst in aspect of a preparation process, and occurrence of a metal powder segregation condition is further avoided, so that performances of synthesized PDC are more uniform and stable, and the product yield also can be increased; secondly, the metal cup simultaneously realizes catalysis on diamond micro powder at the two sides or metal cups at the two sides simultaneously realize catalysis on diamond micro powder in the middle, so that each part of the tapered shape or the arc shape is catalyzed uniformly, stress distribution of tapered or arc-shaped PDC is also improved, and wear resistance, heat resistance and impact resistance of PDC are correspondingly improved.

Description

technical field [0001] The invention belongs to the technical field of superhard material products, and in particular relates to a metal cup for a conical or arc-shaped diamond composite sheet and a preparation method thereof. Background technique [0002] Diamond compact (referred to as PDC) is a kind of composite ultra-thin composite chip made of diamond micropowder and catalyst (such as Co powder, Ni powder, etc.) hard material. It not only has the hardness and wear resistance of diamond, but also has the impact resistance and weldability of cemented carbide. It has been widely used in geological exploration, oil (gas) drilling, engineering drilling, machining and other fields. [0003] Conical or arc-shaped PDC is mainly used for impact rock breaking, which requires it to have high impact resistance and is not easy to delaminate. In the current synthesis of conical or arc-shaped PDC, polycrystalline diamond parts generally adopt single-layer or multi-layer (transition ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/07C22C1/02C22F1/10
CPCC22C1/02C22C19/07C22F1/10
Inventor 花波波陈强王恒
Owner 河南亚龙金刚石制品股份有限公司
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