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Diamond multicrystal group, segment block made of multicrystal group and their manufacturing method

A manufacturing method and diamond technology, applied in the direction of manufacturing tools, metal processing equipment, abrasives, etc., can solve the problems such as the wear resistance and cutting efficiency will not be greatly improved, the manufacturing cost will be increased, and the cutting performance will be poor. Achieve the effect of improving cutting speed and cutting capacity, high cutting efficiency, and more angular edges

Inactive Publication Date: 2005-10-26
曲云霄 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also some problems in the above-mentioned combined cutting body: first, because these single crystal diamond particles rely on the ability of the metal matrix to hold the diamond, and the metal materials used to bond the diamond particles have high hardness and melting point, the hardness The higher the melting point, the greater the brittleness of the metal material, the poorer the ability to bond and hold diamond particles, and the smaller the cushioning and shock absorbing effect of the metal material. In addition, the sintering treatment of metals with high melting point is very troublesome, and it must be vacuum sintered at a high temperature of 900-1300°C to make it bond better with diamond particles. catch
Moreover, in this invention, the mixture of diamond particles and bonding materials can be sintered and formed by placing the mixture of diamond particles and bonding materials in a pre-fabricated mold. However, the production cycle of high-temperature vacuum sintering is long and the cost is high. In addition, the types of molds required by products of different specifications There are many, but when using molds, they need to be made by hand, and the manufacturing cost is high, which further increases the manufacturing cost; and these mainly metal bonding materials also contain some organic substances, which will occur with metal materials during high-temperature sintering. reaction, making some metal materials lose their original functions, which directly affects the ability of metal materials to bond and hold diamonds. Therefore, the mixture must be preheated first, and after these organic substances are volatilized, high-temperature vacuum Sintering process
This method not only increases the cost of production, but also further complicates the manufacturing process, so it cannot meet the requirements of rapid mass production
Secondly, the particle size of the single crystal diamond particles contained in the combined cutting body is 50 μm to 300 μm, which is similar to the size of the single crystal diamond particles distributed in the existing common grinding tools and knives, and because the combined cutting body relies on The parent metal material with higher hardness is used to protect the diamond particles. Since the holding capacity of the parent metal material is limited, especially the concentration of diamond is not high, it is meaningless to use this method to manufacture a combined cutting body with a large particle size, so only its Manufactured into a combined cutting body with a particle size of 400 μm to 1200 μm, so the particle size of the single crystal diamond used for cutting and the particle size of the entire combined cutting body are still small, and the increase in cutting speed is still very limited. And the efficiency of cutting can not be greatly improved, and the volume concentration of the diamond particles contained in the combined cutting body is only 20% to 80%, which is different from that of the diamond particles contained in the existing ordinary abrasive tools and cutters. The volume concentration is similar, so the content of diamond particles in the combined cutting body and the content and concentration of diamond particles in the entire segment are not high, so the cutting wear resistance and cutting efficiency will not be greatly affected. improve

Method used

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  • Diamond multicrystal group, segment block made of multicrystal group and their manufacturing method
  • Diamond multicrystal group, segment block made of multicrystal group and their manufacturing method
  • Diamond multicrystal group, segment block made of multicrystal group and their manufacturing method

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1: the making of diamond polycrystalline group

[0030] 1) The parent metal powder is selected, and its proportioning is calculated by weight percentage: 3% to 8% of tin, 2% to 20% of molybdenum, 1% to 3% of chromium, 10% to 30% of nickel, and 20% to 60% of cobalt , the balance is copper, a total of 500 grams, for spare;

[0031] 2) The adhesive formula is selected as follows: 100-300 grams of granulator powder of model WS-120, 100-300 grams of acetone, and 350-1200 grams of isopropanol are produced and sold by Nanjing Sishang Technology and Trade Center. Bonding agent; Get the mixed liquid prepared as 140 grams of bonding agent for subsequent use;

[0032] 3) Select 200 grams of diamond particles with a particle size of 250-300 μm, mix the above-mentioned metal powder, adhesive and diamond particles, and stir them evenly;

[0033] 4) then the resulting mixture is granulated by a granulator to make diamond polycrystalline groups;

[0034] 5) Sieve the obta...

Embodiment 2

[0035] Embodiment 2: the making of carcass metal powder group

[0036] 1) Select the carcass metal powder, and its proportioning is by weight percentage: 3% to 8% of tin, 10% to 30% of nickel, 20% to 60% of cobalt, and the balance is copper, and prepare 2200 grams for later use;

[0037] 2) The selected formula is: a solvent adhesive of 100-300 grams of WS-120 granulator powder, 100-300 grams of acetone, and 350-1200 grams of isopropanol produced and sold by Nanjing Sishang Technology and Trade Center; Take the prepared mixed liquid as 330 grams of adhesive for subsequent use;

[0038] 3) Mix the above-mentioned metal powder and binder, and stir it evenly, and obtain matrix metal powder with a particle size of 1.5-1.65 mm through a granulator,

[0039] 4) Sieving the obtained matrix metal powder and drying at 50° C. for 20 minutes to obtain matrix metal powder with a particle size of 1.5-1.65 mm.

Embodiment 3

[0040] Embodiment 3: the making of nodal block

[0041] Φ1600 disc saw; volume concentration 36%; diamond 96.1g / 108 teeth=4.45ct / tooth (1g=5ct)

[0042] The block size is 24mm×9mm×13mm=23.5g / tooth in the working layer

[0043] 1) Get 338g of diamond polycrystalline clusters produced in Example 1 (including 96.1g of diamond, 242g of diamond polycrystalline cluster metal powder)+2200g of matrix metal powder clusters produced in Example 2 and mix evenly, set aside;

[0044] 2) Mix the obtained diamond polycrystalline group containing diamond particles and matrix metal powder evenly, and put them into a mold for sintering under pressure at 700-1100°C;

[0045] 3) Remove the mold after the mold cools down to get figure 2 The finished segment 10 is shown.

[0046] The diamond particles 3 in the segment matrix 0 are distributed in the shape of agglomerates, columns or heaps, the particle size of the diamond particles is 160-850 μm, the particle size of the diamond group or diamon...

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Abstract

A polycrystalline diamond assembly is proportionally prepared from the diamond particles (160-850 microns in diameter), the metal material as mother body and adhesive through mxing. A block for cutting purpose is prepared from said polycrystalline diamond assemblies, which are distributed in group mode, column mode or stack mode (1.21-8 mm in granularity). Its advantage is high cutting efficiency and antiwear performance.

Description

(1) Technical field: [0001] The present invention relates to the material that is used for making the cutting tool of cutting hard and brittle material, and the cutting tool made with this material, specifically a kind of diamond polycrystal group containing diamond particle and the diamond polycrystal group made with this Nodules, and their method of manufacture. (two) background technology: [0002] In the field of stone processing and geological drilling, diamond particles are generally added to cutting tools to improve cutting performance, such as the nodes used on the circumference of circular saws for cutting marble, granite, and concrete and used for geological drilling. The nodules set at the front end of the hollow drill bit for drilling or concrete drilling. These nodules are composed of single crystal diamonds with a particle size of 250 μm to 600 μm embedded in a metal matrix, and the single crystal diamonds are relatively uniform and freely distributed in the me...

Claims

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Application Information

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IPC IPC(8): B22F3/00
Inventor 曲云霄曲应博
Owner 曲云霄
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