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Brazing mixture and method for preparing diamond brazing string beads from brazing mixture

A mixture of materials and diamond technology, applied in welding equipment, welding/cutting media/materials, manufacturing tools, etc., can solve the problems of low production efficiency, difficulty in mass production, difficulty in mass production, and high production costs, and achieve affinity Good, the effect of improving wear resistance and improving stability

Pending Publication Date: 2022-01-04
CHANGSHA BAICHUAN SUPERHARD MATERIAL TOOLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing brazing diamond beads use brazing powder or brazing paste as the raw material of the carcass, which is generally prepared by dusting powder or paste, and feeding multiple times. The production efficiency is low and it is difficult to produce in large quantities, and the production cost is high.
[0005] CN 111687509 A discloses a vacuum brazing diamond compounding abrasive and its application in the manufacture of multi-layer diamond vacuum welding tools. The compounding abrasive is composed of Cu-Sn-Cr-Ti-Fe-Ni mixed metal powder, It is made of a mixture of skeleton material and diamond, and the compounded abrasive has good formability and is suitable for diamond brazing and sintering by filling and coating. It is not suitable for pressing and forming. Its production efficiency is low and it is difficult to meet mass production. requirements

Method used

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  • Brazing mixture and method for preparing diamond brazing string beads from brazing mixture
  • Brazing mixture and method for preparing diamond brazing string beads from brazing mixture
  • Brazing mixture and method for preparing diamond brazing string beads from brazing mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A kind of brazing mixture of the present embodiment includes: brazing powder, modifier and forming agent, and the modifier is high hardness powder composed of tungsten carbide and molybdenum carbide in a mass ratio of 1:1, which The dosage is 10% (W / W) of the mass of the brazing powder; the forming agent is 4.0% of the mass of the brazing powder and a paraffin gasoline solution with a concentration of 15%.

[0040] The brazing powder is BNi 2 Nickel alloy brazing powder.

[0041] refer to figure 1 , a method for preparing diamond brazing beads of the present implementation The method for preparing diamond brazing beads comprises the following steps:

[0042] One, the preparation of brazing mixture, comprises the following steps:

[0043] 1) 200 mesh BNi 2 Nickel alloy brazing powder was ball-milled for 10 minutes in a planetary ball mill under the protection of argon, the ball-to-material ratio was 6:1, the milling speed was 400r / min, the balls were made of silicon ...

Embodiment 2

[0051] A brazing mixture in this embodiment includes: brazing powder, a modifier and a forming agent, the modifier is a high-hardness powder composed of titanium diboride and molybdenum carbide in a mass ratio of 2:1 , its dosage is 15% (W / W) of the mass of the solder powder; the forming agent is 3.5% of the mass of the solder powder and a 20% concentration of acrylic acid-methyl methacrylate solution.

[0052] The brazing powder is CuSnTi10 copper alloy brazing powder.

[0053] refer to figure 1 , a method for preparing diamond brazing beads of the present implementation The method for preparing diamond brazing beads comprises the following steps:

[0054] One, the preparation of brazing mixture, comprises the following steps:

[0055] 1) Ball mill 200-mesh CuSnTi10 copper alloy brazing powder in a planetary ball mill for 20 minutes under argon protection, the ball-to-material ratio is 5:1, the milling speed is 450r / min, the balls are made of silicon nitride, and pass 325 m...

Embodiment 3

[0064] A kind of brazing mixture of the present embodiment comprises: fine-grained alloy powder, modifier and forming agent, and described modifier is 15:1 by mass ratio by titanium diboride, chromium carbide and dimolybdenum carbide: 1 composition of high-hardness powder, the amount of which is 17% (W / W) of the mass of the fine-grained alloy powder; the forming agent is 3.8% of the mass of the fine-grained alloy powder and a PVA aqueous solution with a concentration of 20%.

[0065] The fine particle alloy powder is an alloy powder mixed with 300-mesh electrolytic copper powder, 200-mesh tin powder, and 200-mesh titanium dihydride powder at a mass ratio of 72:18:10.

[0066] refer to figure 1 , a method for preparing diamond brazing beads of the present implementation The method for preparing diamond brazing beads comprises the following steps:

[0067] One, the preparation of brazing mixture, comprises the following steps:

[0068] 1) Mix 300-mesh electrolytic copper powde...

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Abstract

The invention discloses a brazing mixture which comprises brazing powder and / or fine-particle alloy powder, a modifier and a forming agent, wherein the modifier is high-hardness powder composed of dimolybdenum carbide and one or two of tungsten carbide, titanium diboride, titanium carbide or chromium carbide, and the use amount of the modifier is 5-20% (W / W) of the mass of the brazing powder or the fine-particle alloy powder; and the forming agent is one or two solutions of paraffin, PEG, PVA and acrylic resin which account for 2.5-4.5% of the mass of the brazing powder or the fine-particle alloy powder. Molybdenum carbide, tungsten carbide, titanium diboride, titanium carbide or chromium carbide and the like are added into the brazing mixture, so that the wear resistance of a matrix is adjusted, and meanwhile, the sintering effect can be improved; and the diamond concentration in the matrix can be conveniently and rapidly adjusted, and efficient cutting can be achieved. The invention further discloses a method for preparing the diamond brazing string beads, through efficient ball milling, destressing, deoxidizing, pelleting and the like, the granularity and morphology of brazing powder are changed, the pressing performance of the mixture is improved, and the brazing string beads are rapidly prepared in a cold pressing forming mode.

Description

technical field [0001] The invention relates to the field of brazing diamond tool manufacturing, in particular to a brazing mixture and a method for preparing diamond brazing beads from the same. Background technique [0002] At present, the commonly used diamond beads mainly include sintered diamond beads and brazed diamond beads. Among them, sintered diamond beads have a long service life but low cutting efficiency, and brazed diamond beads have high cutting efficiency but their actual service life is relatively short. The performance of service life and cutting efficiency are different. In some aspects, the service life of beads and cutting efficiency are opposite; to some extent, sintered diamond beads and brazed diamond beads are complementary in use. [0003] Diamond has a covalent bond structure and has a high interfacial energy with general metals, making it difficult to form a high-strength interfacial bond between the two. Therefore, how to improve the bonding for...

Claims

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Application Information

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IPC IPC(8): C04B35/52C04B35/622C04B35/638C04B35/64B23K35/36B23K35/40
CPCC04B35/52C04B35/622C04B35/638C04B35/64B23K35/3601B23K35/40C04B2235/6562C04B2235/6567C04B2235/6581C04B2235/661
Inventor 佘直昌周斌杨跃飞唐汇德甄春刚覃光明
Owner CHANGSHA BAICHUAN SUPERHARD MATERIAL TOOLS
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