Iron nickel aluminum base bonding agent diamond tool and preparation method thereof

A diamond tool and base bond technology, applied in other manufacturing equipment/tools, turbines, engine components, etc., can solve the problems of high diamond grinding tool production cost, poor self-sharpening of bronze bond, sintering temperature sensitivity, etc. Low creep strength characteristics, good dry-type high temperature aerobic environment adaptability, excellent effect of medium temperature strength

Active Publication Date: 2018-04-17
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In comparison, bronze binders have poor self-sharpening properties, are prone to clogging and heating, and are difficult to repair; the high price of cobalt makes the production cost of diamond abrasives high; When the content is greater than 40%, the iron-based binder is very sensitive to the sintering temperature, and it is easy to reduce the hardness of the abrasive tool due to under-burning and excessive erosion of diamond.

Method used

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Examples

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preparation example Construction

[0029] A preparation method of an iron-nickel-aluminum-based bond diamond tool, comprising the following steps:

[0030] 1) Weigh the metal bond, sintering aid and abrasive according to the above composition, and mix them in a ball mill to obtain a diamond tool preparation material;

[0031] 2) cold pressing the diamond tool preparation material to obtain a diamond tool blank;

[0032] 3) Sintering the diamond tool body to obtain a diamond tool.

[0033] Preferably, in step 1), the rotating speed of the ball mill is 150-250r / min, the ball milling time is 3-5h, and the ball-to-material ratio is (5-15): 1; further preferably, in step 1), the rotating speed of the ball mill is 150~250r / min, the ball milling time is 3~4.5h, and the ball-to-material ratio is (6~12):1.

[0034] Further, in step 1), the total volume of the balls and the materials does not exceed 2 / 3 of the volume of the ball mill jar.

[0035] Preferably, in step 2), the compact density of the diamond tool body is...

Embodiment 1

[0042] A kind of iron-nickel-aluminum base bond diamond tool, comprises the steps:

[0043] Fe 3 The mass fraction of Al is 40 parts, Ni 3 The mass fraction of Al is 40 parts, Fe 3 The particle size of Al powder is 8μm, Ni 3The particle size of the Al powder was 10 μm. The mass fraction of Cu-Sn pre-alloyed powder is 17 parts, and its particle diameter is 15 μm; the mass fraction of Si powder is 1 mass fraction, and its particle diameter is 3 μm; the mass fraction of B powder is 0.5 mass fraction, and its particle diameter is 2 μm; TiH 2 The mass fraction of the powder is 1.5 parts, and its particle diameter is 3 μm. Then add diamond abrasives so that the volume fraction of the grinding layer is 25%, and the particle size is 50 / 60 mesh. Put the metal bond, sintering aid and abrasive in the above ratio into a ball mill and mix thoroughly. The speed of the ball mill is 200r / min, the ball milling time is 3h, and the ball-to-material ratio is 6:1. Put the mixed abrasive too...

Embodiment 2

[0045] A kind of iron-nickel-aluminum base bond diamond tool, comprises the steps:

[0046] Fe 3 The mass fraction of Al is 42 parts, Ni 3 The mass fraction of Al is 42 parts, Fe 3 The particle size of Al powder is 15μm, Ni 3 The particle diameter of the Al powder is 20 μm. The mass fraction of Cu-Sn pre-alloyed powder is 12 parts, and its particle size is 20 μm; the mass fraction of Si powder is 2 parts, and its particle size is 10 μm; 5 μm; TiH 2 The mass part of the powder is 1 part, and its particle diameter is 10 μm. Then add diamond abrasives so that the volume fraction of the grinding layer is 18.75%, and the particle size is 40 / 50 mesh. Put the metal bond, sintering aid and abrasive in the above ratio into a ball mill and mix thoroughly. The speed of the ball mill is 150r / min, the ball milling time is 4h, and the ball-to-material ratio is 8:1. Put the mixed abrasive tool preparation material into a cemented carbide cold press mold for cold pressing, the pressure...

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Abstract

The invention discloses an iron nickel aluminum base bonding agent diamond tool and a preparation method thereof. The diamond tool comprises a metal bonding agent, a sintering aid and an abrasive; themetal bonding agent consists of 35-45 mass parts of Fe3Al powder and 35-45 mass parts of Ni3Al; the sintering aid consists of 5-20 mass parts of Cu-Sn prealloy powder, 0.5-2 mass parts of Si powder,0.5-2 mass parts of B powder and 0.5-2 mass parts of TiH2 powder; the abrasive is diamond; and the diamond abrasive is 5-25 volume% of a grinding layer. Meanwhile, the invention discloses the preparation method of the iron nickel aluminum base bonding agent diamond tool. Fe3Al and Ni3Al are fully mixed as a bonding agent of a dry machining diamond tool; the high-temperature creep strength and themedium-temperature strength can be fully used to obtain the performance of resisting microscale high-temperature creep in grinding; and Fe3Al and Ni3Al can be preferably bonded with a basal body to change the low-creep strength characteristic of a traditional metal bonding agent.

Description

technical field [0001] The invention relates to an iron-nickel-aluminum-based bond diamond tool and a preparation method thereof. Background technique [0002] Diamond tools are widely used in structural or material processing such as concrete, complex rock formations, ceramics and asphalt pavements, as well as on-site cutting and drilling. The metal binders used in the manufacturing process are mainly copper-based, cobalt-based, iron-based, nickel-based, tungsten-based and aluminum-based binders. Among them, the cost of non-ferrous metals such as cobalt and copper is high, and the diamond abrasive is easy to fall off in the early grinding process. In recent years, there have been many studies on substituting iron for cobalt. Diamond tools based on iron base and nickel-aluminum compound mixed as a binder system have been designed and synthesized through appropriate material structure. They have good affinity for diamond and high temperature creep strength. High, high diamo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F5/00B22F1/00C22C26/00C22C30/04
Inventor 张凤林陈家泓刘伟尹自强王素娟
Owner GUANGDONG UNIV OF TECH
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