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A kind of metal bond grinding tool and preparation method thereof

A metal bond and abrasive tool technology, applied in the field of grinding, can solve problems such as high melting point, low abrasive tool hardness, and large diamond damage, and achieve the effects of good high-temperature holding performance, increased strength, and long service life

Active Publication Date: 2019-01-15
GUANGDONG NANOGRIND TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

but you 3 Al has a high melting point (1390°C), and at this temperature, it will damage the diamond during solid-state densification and sintering with diamond, resulting in a low hardness of the final abrasive tool.

Method used

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  • A kind of metal bond grinding tool and preparation method thereof
  • A kind of metal bond grinding tool and preparation method thereof
  • A kind of metal bond grinding tool and preparation method thereof

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preparation example Construction

[0038] The present invention also provides a kind of preparation method of metal bond grinding tool, comprises the following steps:

[0039] A) Ni 3 The Al powder is immersed in the plating solution for electroless plating to obtain a metal bond, which includes Ni ions and Co ions in the plating solution;

[0040] B) ball milling the metal bond and the abrasive to obtain the ball milling mixture;

[0041] C) cold-pressing the ball mill mixture to obtain a green body;

[0042] D) Sintering the green body to obtain a metal bond abrasive tool.

[0043] In the present invention, Ni 3 The Al powder is immersed in the plating solution for electroless plating to obtain a metal bond. In the present invention, the Ni 3 The particle size of the Al powder is preferably 10-50 μm, more preferably 15-45 μm, most preferably 20-40 μm; the plating solution includes Ni ions and Co ions, more preferably nickel sulfate, cobalt sulfate, hypophosphorous acid Sodium, Lactic Acid, Anhydrous Sodi...

Embodiment 1

[0055] Ni with a particle size of 20 μm 3 Al powder is put into the chemical plating solution containing Ni and Co ion that prepares (nickel sulfate 30g / L, cobalt sulfate 31.5g / L, sodium hypophosphite 34g / L, lactic acid 20ml / L, anhydrous sodium acetate 8g / L, Propionic acid 10ml / L, succinic acid 10g / L, glycine 0.01g / L, sodium lauryl sulfate 50mg / L) were fully reacted, and the metal binder was obtained after taking out and drying. The obtained metal bond Ni-Co alloy coating has a thickness of 1 μm.

[0056] Ball mill the metal bond with diamond abrasives with a particle size of 40-50 meshes and mix them uniformly. The ball mill speed is 200r / min, the ball milling time is 30min, and the ball-to-material ratio is 10:1 to obtain abrasive preparation materials.

[0057] The abrasive preparation material is put into a cold-pressing mold for cold-pressing to obtain an abrasive body.

[0058] Hot pressing and sintering the green body of the abrasive tool to obtain superhard abrasive ...

Embodiment 2

[0061] 20μm Ni 3 Al powder is put into the chemical plating solution containing Ni and Co ion that prepares (nickel sulfate 31g / L, cobalt sulfate 32.5g / L, sodium hypophosphite 34g / L, lactic acid 21ml / L, anhydrous sodium acetate 9g / L, Propionic acid 10ml / L, succinic acid 10g / L, glycine 0.01g / L, sodium lauryl sulfate 50mg / L) were fully reacted, and the metal binder was obtained after taking out and drying. The obtained metal bond Ni-Co alloy coating has a thickness of 2 μm.

[0062] The metal bond and the CBN abrasive with a particle size of 125-130 mesh were ball milled and mixed uniformly. The ball mill speed was 150r / min, the ball milling time was 60min, and the ball-to-material ratio was 15:1 to obtain the abrasive preparation material.

[0063] The abrasive preparation material is put into a cold-pressing mold for cold-pressing to obtain an abrasive body.

[0064] Hot pressing and sintering the green body of the abrasive tool to obtain superhard abrasive tools. The maxim...

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Abstract

The invention provides a metallic bond abrasive product. The metallic bond abrasive product comprises the raw materials of a metallic bond and an abrasive product, wherein the metallic bond is Ni3Al powder of which the surface is coated with a Ni-Co alloy layer. According to the metallic bond abrasive product, the Ni3Al powder is coated with the Ni-Co alloy layer, so that the sintering property of Ni3Al can be improved, the strength and toughness of the abrasive product can be improved after sintering, and the room temperature brittleness of Ni3Al can be reduced; besides, the metallic bond has relatively good high temperature control property for the abrasive product, the early falling-off behavior of the abrasive product can be effectively controlled, a relatively long service life is obtained, and excellent grinding capacity is achieved; and experimental results show that the Rockwell hardness of the metallic bond abrasive product is 113HRB. The invention further provides a preparation method of the metallic bond abrasive product.

Description

technical field [0001] The invention belongs to the technical field of grinding processing, and in particular relates to a metal bond abrasive tool and a preparation method thereof. Background technique [0002] Diamond grinding tools are widely used in the grinding of engineering ceramic materials, crystal materials, semiconductor materials, hard alloy materials and composite materials. At present, in the field of high-precision grinding, metal-bonded diamond abrasive tools are mainly used in China, that is, diamond abrasive particles are bonded into a whole with a metal bond to form an abrasive tool. This type of grinding tool has the characteristics of strong bonding force, long grinding life and good shape retention. [0003] Intermetallic Ni 3 Al has excellent anomalous yield characteristics in a wide temperature range and adaptability to dry high-temperature aerobic environments, so the use of Ni 3 Al intermetallic compounds can make full use of their high-temperatu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24D3/10
CPCB24D3/10
Inventor 张凤林卢家锋王健周玉梅伍尚华邓欣
Owner GUANGDONG NANOGRIND TECH CO LTD