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Rare earth modified tungsten-based bond diamond angle grinding disc and its manufacturing method

A tungsten-based binder and rare-earth modification technology, which is applied in the field of rare-earth modified tungsten-based binder diamond angle grinding discs and their manufacturing fields, can solve the problems of graphitization of diamond particles, high sintering temperature, and narrow application range, and achieve the goal of achieving the best performance in particle size. Stable diameter, high hardness, good effect

Active Publication Date: 2016-06-08
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 angle grinding disc carcass, use the corresponding mold to cold-press the above mixture, then carry out vacuum hot-press 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 angle grinding disc carcass, use the corresponding mold to cold-press the above mixture, then carry out vacuum hot-press 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 angle grinding disc carcass, use the corresponding mold to cold-press the above mixture, then carry out vacuum hot-press 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°...

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Abstract

The invention discloses a diamond angle-grinding wheel made of a rare-earth modified tungsten-base binding agent and a manufacturing method of the diamond angle-grinding wheel. The method includes: fully mixing diamond powder and the rare-earth modified tungsten-base binding agent; subjecting the mixture to cold press molding, and then performing vacuum hot-pressing sintering at the temperature of 900-960 DEG C under the force of 140-200KN for 25-35 minutes; then performing hot isostatic pressing sintering at the temperature of 840-900 DEG C under the pressure of 80-120 Mpa for 5-10 minutes to obtain a diamond angle-grinding wheel blank; mounting the diamond angle-grinding wheel blank on an angle-grinding wheel base body to obtain the diamond angle-grinding wheel. The rare-earth modified tungsten-base binding agent comprises 40-75 parts of tungsten, 2-6 parts of nickel, 2-5 parts of ferrum, 8-30 parts of stannum, 7-20 parts of copper, 0.4-1 part of manganese and 0.1-1 part of rare earth elements. Holding force of diamond particles can be enhanced remarkably, abrasion resistance of the diamond angle-grinding wheel is improved, and accordingly processability of the diamond angle-grinding wheel is improved while service life of the diamond angle-grinding wheel is prolonged.

Description

technical field [0001] The invention relates to a rare earth modified tungsten-based bond diamond angle grinding disc and a manufacturing method thereof. Background technique [0002] Diamond angle grinding discs are supporting tools for angle grinders, and are widely used in cutting and grinding of various stone, glass, and ceramics. Commonly used diamond angle grinding disc matrixes 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/14B22F1/00C22C26/00C22C27/04C22C30/00
Inventor 徐西鹏郭桦黄辉姜峰黄国钦
Owner HUAQIAO UNIVERSITY
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