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Iron-based matrix powder for diamond composite block and its application

A carcass powder and diamond technology, which is applied in the field of powder metallurgy, can solve the problems of diamond performance degradation, low cleanliness, and extended cycle, so as to improve hardness and wear resistance, solve performance degradation, and enhance overall performance.

Active Publication Date: 2019-02-19
HANGZHOU HUAGUANG ADVANCED WELDING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is generally a problem of low cleanliness of metal powders sold in China. These powders have been oxidized and contain metal oxides during the manufacturing process, so it cannot fundamentally solve the problem of the decline in diamond performance after sintering
In order to obtain high-performance diamond products, some manufacturers have added reduction and deoxidation operations before sintering the powder, but this treatment cannot avoid the appearance of metal oxides during the sintering process, and adjusting the production process will increase costs and prolong the cycle. Great inconvenience to production

Method used

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  • Iron-based matrix powder for diamond composite block and its application
  • Iron-based matrix powder for diamond composite block and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The iron-based carcass powder for the diamond composite block is composed of the following components in mass percentage: 20% copper powder, 10% cobalt powder, 10% nickel powder, 5% tin powder, 1.5% aluminum powder, and the balance is iron powder. Among them, the aluminum powder is nano-scale aluminum powder, the particle size is 1000 mesh, the oxygen content is 950ppm, and no agglomeration phenomenon occurs.

[0018] The preparation of diamond composite block comprises the following steps:

[0019] 1) Mixing: put the above-mentioned iron-based matrix powder and diamond particles into the mixer according to the volume ratio of 7:3 and mix evenly;

[0020] 2) Hot-press sintering: use a vacuum hot-press sintering machine to sinter at a temperature of 820° C. for 2 minutes to obtain a diamond composite block.

[0021] The above-mentioned diamond composite block is brazed to a low-grade granite saw blade, and the service life of the granite saw blade is increased by 30% co...

Embodiment 2

[0023] The iron-based matrix powder for the diamond composite block consists of the following components in mass percentage: 18% copper powder, 11% cobalt powder, 9% nickel powder, 6% tin powder, 1.4% aluminum powder, and the balance is iron powder. Among them, the aluminum powder is nano-scale aluminum powder, the particle size is 1000 mesh, the oxygen content is 950ppm, and no agglomeration phenomenon occurs.

[0024] The preparation of the diamond composite block is the same as in Example 1. The diamond composite block is brazed to a low-grade granite saw blade, and the service life of the granite saw blade is increased by 27% compared with the diamond composite block without adding nano-aluminum powder in the same situation.

Embodiment 3

[0026] The iron-based matrix powder for the diamond composite block consists of the following components in mass percentage: 22% copper powder, 9% cobalt powder, 11% nickel powder, 4% tin powder, 1.6% aluminum powder, and the balance is iron powder. Among them, the aluminum powder is nano-scale aluminum powder, the particle size is 1000 mesh, the oxygen content is 950ppm, and no agglomeration phenomenon occurs.

[0027] The preparation of the diamond composite block is the same as in Example 1. The diamond composite block is brazed to a low-grade granite saw blade, and the service life of the granite saw blade is increased by 28% compared with the diamond composite block without adding nano-aluminum powder in the same situation.

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Abstract

The invention discloses an iron-based matrix powder for a diamond composite block and application and belongs to the technical field of powder metallurgy. The iron-based matrix powder is prepared from the following components in percentage by mass: 10-25 percent of copper powder, 8-15 percent of cobalt powder, 8-15 percent of nickel powder, 3-10 percent of tin powder, 0.5-2 percent of aluminum powder and the balance iron powder, wherein the particle size of the aluminum powder is 1000 meshes or below, and the oxygen content is 1000ppm or below. According to the iron-based matrix powder, the aluminum powder uniformly disperses in the iron-based matrix powder and has gaps with other metal powder to form numerous micro-areas; in the sintering process of a diamond, the nano aluminum powder simultaneously reacts with oxygen in the micro-areas and oxides on the surfaces of the metal powder, so that on one hand, the surface of the metal powder is prevented from being oxidized, on the other hand, the metal oxides existing on the surface of the metal powder are reduced, and finally, an alumina dispersed phase with high hardness is produced, and the alumina dispersed phase exerts the positive effect of improving the hardness and the wear resistance of the diamond composite block.

Description

technical field [0001] The invention relates to an iron-based matrix powder for a diamond composite block, and also relates to the application of the iron-based matrix powder in preparing a diamond composite block, belonging to the technical field of powder metallurgy. Background technique [0002] Diamond composite blocks have the advantages of high hardness, good wear resistance, and strong rigidity, and are widely used in oil drilling, geological exploration, coal field drilling, mechanical processing, construction, and medical treatment. Diamond composite blocks are processed by cold pressing-hot pressing sintering or direct hot pressing sintering by powder prepared in a certain proportion. The sintered powder generally contains diamond particles and metal powder (such as bronze-based, cobalt-based or iron-based matrix powder, etc.). However, the surface free energy of metal powder is high, and it is easy to be oxidized after being stored for a long time. Especially in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/04C22C30/02C22C38/16C22C38/10C22C38/08C22C38/06C22C26/00C22C33/02B22F3/14
CPCB22F3/14B22F2998/10B22F2999/00C22C26/00C22C30/02C22C30/04C22C33/0285C22C38/008C22C38/06C22C38/105C22C38/16B22F1/0003B22F3/1039B22F2201/20
Inventor 龙伟民钟素娟薛行雁张青科孙华为赵辰丰朱坤赵建昌黄成志王洋
Owner HANGZHOU HUAGUANG ADVANCED WELDING MATERIALS CO LTD