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Method for preparing diamond blade by using special metal bond

A metal bond, diamond cutting technology, used in manufacturing tools, stone processing tools, stone processing equipment, etc., can solve the problems of incomplete densification of sintering, insufficient element alloying, and inability to be widely used, and achieve excellent composition. The effect of uniformity, lower sintering temperature, and shorter sintering time

Active Publication Date: 2011-09-21
南通江海港建设工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the carcass uses the mixed powder of single element powder, there are the following disadvantages: high sintering temperature, insufficient alloying of elements, and incomplete densification of sintering, etc.
This pre-alloyed powder can make the diamond turning tool have high hardness, but the content of noble metals cobalt and nickel in this pre-alloyed powder is high, and the cost is high, so it cannot be widely used

Method used

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  • Method for preparing diamond blade by using special metal bond

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) According to the mass percentage of pre-alloyed powder 15%, TFe (carbonyl iron powder) 10%, Cu 22%, Fe 40%, Sn 3%, Zn 3%, Mn 1.9%, W 5%, PFe 0.1% Take the raw materials, and then fully mix and ball-mill the above raw materials in a mechanical mixer to obtain a special metal bond; the mass percentage composition of the pre-alloyed powder is: Fe 45%, Ni 10%, Cu 35%, Co 10 %;

[0023] (2) Mix the special metal bond obtained in step (1) with diamond in a weight ratio of 1:0.125;

[0024] (3) Add the rubber molding agent whose mass is 8% of the mass of the special metal bond and diamond mixed powder obtained in step (2), mix evenly, and air dry;

[0025] (4) Put the air-dried powder in step (3) into the steel mold prepared in advance, and cold press at a pressure of 11Mpa;

[0026] (5) Sintering at high temperature for 5 hours at 765°C;

[0027] (6) Grinding the sheet to make a cutting sheet.

[0028] The sharpness and service life of the cutting disc of this embodim...

Embodiment 2

[0030] Except that the following parameters were changed, other steps were the same as in Example 1. In step (1), the mass percentage of raw materials is: pre-alloyed powder 17%, TFe 10%, Cu 30%, Fe 25%, Sn 3%, Zn 6%, Mn 3.8%, W 5%, PFe 0.2%; The mass percent composition of the pre-alloyed powder is: Fe 55%, Ni 10%, Cu 30%, Co 5%;

[0031] The ratio of the weight ratio of the special metal bond to the diamond in step (2) is 1: 0.175;

[0032] In step (5), the sintering temperature is 795°C, and the sintering time is 6 hours;

[0033] The molding agent in step (3) is a polyethylene glycol molding agent.

[0034] The sharpness and service life of the cutting disc of this embodiment were tested, and the test results are shown in Table 1.

Embodiment 3

[0036] Except that the following parameters were changed, other steps were the same as in Example 1. In step (1), the mass percentage of raw materials is: pre-alloyed powder 20%, TFe 15%, Cu 22%, Fe 25%, Sn 3%, Zn 3.8%, Mn 1%, W 10%, PFe 0.2%; The mass percent composition of the pre-alloyed powder is: Fe 55%, Ni 10%, Cu 25%, Co 10%;

[0037] In step (2), the weight ratio of the special metal bond to the diamond is 1:0.20;

[0038] In step (5), the sintering temperature is 780°C, and the sintering time is 5.5 hours;

[0039] The molding agent in step (3) is a polyethylene glycol molding agent.

[0040] The sharpness and service life of the cutting disc of this embodiment were tested, and the test results are shown in Table 1.

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Abstract

The invention discloses a method for preparing a diamond blade by using a special metal bond. The method comprises the following steps of: (1) weighing the following raw materials in percentage by mass: 10-15% of pre-alloying powder, 22-30% of Cu, 3-12% of Sn, 25-40% of Fe, 10-15% of TFe, 3-6% of Zn, 5-10% of W, 1-3% of Mn and 0.1-0.2% of PFe, fully mixing and ball-milling the raw materials in a mechanical mixer, wherein the pre-alloying powder comprises the following materials in percentage by mass: 45-55% of Fe, 5-10% of Ni, 25-35% of Cu and 5-10% of Co; (2) mixing the metal powder prepared in the step (1) with diamond; (3) adding a forming agent, mixing uniformly and air drying; (4) cold pressing; (5) performing hot pressed sintering to obtain a high-density thin sheet; and (6) grinding the thin sheet to finally obtain the blade. The method for preparing the blade by using the special metal bond has the advantages of low sintering temperature and short sintering time, and the prepared blade has long service life and good sharpness, therefore, the use cost of the blade is greatly reduced.

Description

technical field [0001] The invention relates to a method for preparing a diamond cutting sheet, a method for preparing a diamond cutting sheet by using a special metal bond. Background technique [0002] The high hardness and excellent physical and mechanical properties of diamond make diamond cutting discs an indispensable material for processing various hard materials. Diamond tools are made by mixing metal powder and artificial diamond particles, pressing and sintering. When the carcass uses a mixed powder of single element powder, there are the following disadvantages: high sintering temperature, insufficient alloying of elements, and incomplete densification of sintering. Therefore, pre-alloyed powders are widely used. [0003] Currently, electrolytic copper powder, reduced iron powder, and reduced cobalt powder are the most widely used metal powders. Cobalt powder has many advantages when used as a carcass, but it is expensive and its use is limited. Patent documen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/16B22F7/00B28D1/22
Inventor 王晨兰杜建国
Owner 南通江海港建设工程有限公司
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