Preparation method of diamond segment

A diamond segment, diamond technology, applied in other manufacturing equipment/tools, turbines, engine components, etc., can solve the problems of unsuitable mass production, large consumption of molds, discontinuous production, etc. High quality and good stability

Active Publication Date: 2015-03-11
广东新劲刚金刚石工具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the preparation method of this invention is simple and efficient, there are still many defects, such as using a mold in the preparation process, and the consumption of the mold is large, the cost is high, and it is discontinuous production, so the production efficiency still needs to be improved. Not suitable for mass production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for preparing a diamond nodule, comprising the following steps in sequence:

[0041] (1) Weigh a certain amount of pre-alloyed powder, diamond, and additives, and put them into a ball mill and mix them evenly;

[0042] (2) Compressed diamond segments;

[0043] (3) Carry out high-temperature continuous sintering of the pressed diamond blocks;

[0044] (4) Grinding the sintered diamond segments.

[0045] The mass percentages of pre-alloyed powder, diamond, and additives are 85%, 10%, and 5% respectively, and the mixing time of the three raw materials is 15 hours. The mass percent of each component in the pre-alloyed powder is: 40% iron, 15% nickel, 30% copper, and 15% tin. The particle size of the pre-alloyed powder is 5 μm, and the particle size of the diamond is 30 / 40 mesh.

[0046] Additives consist of cold press lubricants and antioxidants. The cold press lubricant is zinc stearate, and the antioxidant is sodium sulfite. Two-way cold pressing of dia...

Embodiment 2

[0050] A method for preparing a diamond segment is the same as in Example 1, except that the mass percentages of pre-alloyed powder, diamond, and additives are 99%, 0.5%, and 0.5%, respectively, and the mixing time of the three raw materials is 24 hours. The mass percentage of each component in the pre-alloyed powder is: iron 35%, nickel 10%, copper 15%, tin 10%, phosphorus 5%, silicon 8%, titanium 10%, magnesium 7%. The particle size of the pre-alloyed powder is 25 μm, and the particle size of the diamond is 170 / 200 mesh.

[0051] Additives consist of cold press lubricants and antioxidants. The cold press lubricant is graphite, and the antioxidant is sodium bisulfite. Two-way cold pressing of the diamond segment is formed by an automatic press, and the pressure of the press is set to 1200MPa / m 2 . The pressing weight of a single diamond segment is 80g, and the pressed diamond segments are evenly placed in the sintering trays, with 50 pieces placed on each tray.

[005...

Embodiment 3

[0055] A method for preparing a diamond segment is the same as in Example 1, except that the mass percentages of pre-alloyed powder, diamond, and additives are 94.9%, 5%, and 0.1%, respectively, and the mixing time of the three raw materials is 1 hour. The mass percent of each component in the pre-alloyed powder is: 5% iron, 30% nickel, 20% copper, 10% tin, 10% manganese, 5% aluminum, and 20% magnesium. The particle size of the pre-alloyed powder is 15 μm, and the particle size of the diamond is 40 / 45 mesh.

[0056] Additives consist of cold press lubricants and antioxidants. The cold press lubricant is liquid paraffin, and the antioxidant is sodium thiosulfite. Two-way cold pressing of diamond segments is formed by an automatic press, and the pressure of the press is set at 800MPa / m 2 . The pressing weight of a single diamond segment is 50g, and the pressed diamond segments are evenly placed in the sintering tray, and one hundred pieces are placed on each tray.

[005...

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Abstract

The invention discloses a preparation method of a diamond segment. The preparation method comprises the following steps in sequence: a certain amount of prealloy powder or elemental metal powder, diamond and additives are weighed and mixed; the diamond segment is formed through pressing; the pressed diamond segment is sintered; and the sintered diamond segment is polished, wherein the sintering is high-temperature continuous sintering. The preparation method of the diamond segment is simple, wide in application range and low in processing cost, the sharpness of a product is good, the production efficiency is high, edge breakage is almost avoided, and automatic batch production can be realized. According to the diamond segment finishing high-temperature continuous sintering, the diamond can be firmly held by the prealloy powder or elemental metal powder matrix, so that the diamond segment has longer service life and higher sharpness, the relative density of the sintered diamond segment can be higher than 90%-98%, and the hardness can reach HRB 100-115.

Description

technical field [0001] The invention belongs to the technical field of preparation of grinding tools, and in particular relates to a preparation method of diamond nodules. Background technique [0002] In the field of processing and cutting technology for materials with high hardness such as ceramics and stone, diamond rollers and diamond edging wheels are widely used for their efficient grinding performance. At present, most of the diamond segments used for welding diamond rollers and diamond edging wheels on the market are made of metal element powder or alloy powder mixed with diamond, and then hot-pressed and sintered. There are many problems in its preparation process, such as high energy consumption, large consumption of graphite molds, poor working environment, high labor costs, poor product adaptability, and insufficient product sharpness, etc., which is not conducive to the country's vigorous promotion of energy conservation, emission reduction and environmental...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/16B22F1/00B22F5/00
Inventor 王振明张永奇
Owner 广东新劲刚金刚石工具有限公司
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