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Diamond circular saw blade with rare earth modified tungsten-based binding agent and manufacturing method thereof

A tungsten-based binder and rare earth modification technology, which is applied to other manufacturing equipment/tools, turbines, engine components, etc., can solve the problems of graphitization of diamond particles, narrow application range, high sintering temperature, etc., and achieve stable particle size and high effect Good, high hardness effect

Active Publication Date: 2014-11-05
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the melting point of tungsten is as high as 3940°C. The temperature required for sintering with tungsten as a metal bond far exceeds the ability of diamond, which is likely to cause graphitization of diamond particles. Therefore, most of the sintering temperatures are relatively low at present. Tungsten carbide-based binder, pure metal tungsten-based binder has not been reported
However, on the one hand, tungsten carbide-based binders have formed carbides on the tungsten element itself, which weakens the effect of chemical metallurgical bonding with diamond; Diamond with better thermal performance is used together, the cost is higher, and the application range is narrow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Preparation of rare earth modified tungsten-based binder: based on the total mass of the rare earth modified tungsten-based binder, it contains the following components: 75% tungsten, 5% nickel, 4% iron, 8% tin, 7% copper, manganese 0.5%, lanthanum oxide 0.5%, the above components are fully mixed and then uniformly ground by high-energy ball mill; the artificial single crystal diamond powder with a particle size of 40 / 50 is fully mixed with the above-mentioned rare earth modified tungsten-based binder according to the diamond concentration of 75% ;

[0028] 2) According to the shape of the required diamond circular saw blade head, use the corresponding mold to cold press the above mixture, then carry out vacuum hot pressing sintering, the sintering temperature is 950°C, the sintering pressure is 150KN, and the sintering time is 30 minutes;

[0029] 3) After vacuum hot-pressing sintering, carry out hot isostatic pressing sintering at a sintering temperature of 850°C, ...

Embodiment 2

[0032] 1) Preparation of rare earth modified tungsten-based binder: based on the total mass of the rare earth modified tungsten-based binder, it contains the following components: 70% tungsten, 5% nickel, 4% iron, 11% tin, 9% copper, manganese 0.5%, lanthanum oxide 0.5%, the above components are fully mixed and then uniformly ground by high-energy ball mill; the artificial single crystal diamond powder with a particle size of 40 / 50 is fully mixed with the above-mentioned rare earth modified tungsten-based binder according to the diamond concentration of 75% ;

[0033] 2) According to the shape of the required diamond circular saw blade head, use the corresponding mold to cold press the above mixture, then carry out vacuum hot pressing sintering, the sintering temperature is 950°C, the sintering pressure is 150KN, and the sintering time is 30 minutes;

[0034] 3) After vacuum hot-pressing sintering, carry out hot isostatic pressing sintering at a sintering temperature of 850°C,...

Embodiment 3

[0037] 1) Preparation of rare earth modified tungsten-based binder: based on the total mass of the rare earth modified tungsten-based binder, it contains the following components: tungsten 60%, nickel 5%, iron 4%, tin 17%, copper 13%, manganese 0.5%, lanthanum oxide 0.5%, the above components are fully mixed and then uniformly ground by high-energy ball mill; the artificial single crystal diamond powder with a particle size of 40 / 50 is fully mixed with the above-mentioned rare earth modified tungsten-based binder according to the diamond concentration of 75% ;

[0038] 2) According to the shape of the required diamond circular saw blade head, use the corresponding mold to cold press the above mixture, then carry out vacuum hot pressing sintering, the sintering temperature is 950°C, the sintering pressure is 150KN, and the sintering time is 30 minutes;

[0039] 3) After vacuum hot-pressing sintering, carry out hot isostatic pressing sintering at a sintering temperature of 850°C...

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Abstract

The invention discloses a diamond circular saw blade with a rare earth modified tungsten-based binding agent and a manufacturing method of the diamond circular saw blade with the rare earth modified tungsten-based binding agent. Diamond powder and the rare earth modified tungsten-based binding agent are fully mixed, wherein the rare earth modified tungsten-based binding agent comprises 40-75 parts of tungsten, 2-6 parts of nickel, 2-5 parts of iron, 8-30 parts of tin, 7-20 parts of copper, 0.4-1 part of manganese and 0.1-1 part of rare earth elements; after a mixture is formed in a cold pressing mode, vacuum hot-pressing sintering is carried out for 25-35 minutes under 900-960 DEG C and 140-200 KN; then hot isostatic pressing sintering is carried out for 5-10 minutes under 840-900 DEG C and 80-120 MPa, and diamond circular saw blade segments are obtained; the diamond circular saw blade segments are installed and connected to a circular saw blade base body, and then the diamond circular saw blade is obtained. The hold force of diamond particles can be improved significantly, abrasion resistance of the diamond circular saw blade is increased, and therefore the machining performance of the diamond circular saw blade is improved, and the service life of the diamond circular saw blade is prolonged.

Description

technical field [0001] The invention relates to a rare earth modified tungsten-based bond diamond circular saw blade and a manufacturing method thereof. Background technique [0002] Diamond circular saw blades are widely used in the cutting of hard and brittle materials such as concrete, refractory materials, stone, and ceramics. Commonly used diamond circular saw blade carcasses include iron-based and cobalt-based. The iron-based matrix has high mechanical properties, good wettability to diamond, and low cost, but its self-sharpening is not good; while the cobalt-based matrix has good formability and sinterability, which is suitable for Diamond has good wettability, strong adhesion, good toughness, and good self-sharpening. It is the most widely used matrix in the field of diamond tools, but the diamond on the cobalt-based matrix is ​​mechanically held, resulting in diamond particles It cannot be fully exposed for effective cutting, and it will be seriously worn due to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/12B22F1/00B22F5/00
Inventor 黄国钦徐西鹏郭桦黄辉姜峰
Owner HUAQIAO UNIVERSITY
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