Nickel-based brazing material for brazed diamond tool and preparation method thereof

A technology of diamond tools and brazing material, which is applied in the field of nickel-based brazing material for brazing diamond tools and its preparation, and can solve problems such as degradation and thermal alteration of diamonds

Active Publication Date: 2010-11-24
ADVANCED TECH BAZHOU SPECIAL POWDER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

U.S. Patent Pat.No.4776862 mainly introduces Ni-Fe-B-Si brazing materials, as well as some U.S. patents in the 1960s and 1970s, such as U.S. Pat.No.3328189, 3378361, 3868235, 3615309, etc. Some Ni-based brazing materials, but the melting point basically exceeds 1000 ° C, and it is easy to cause thermal alteration and degradation of diamond when applied to brazing and brazing diamond tools

Method used

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  • Nickel-based brazing material for brazed diamond tool and preparation method thereof
  • Nickel-based brazing material for brazed diamond tool and preparation method thereof
  • Nickel-based brazing material for brazed diamond tool and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1: the formula of the present embodiment is by weight percentage, and concrete composition is as follows:

[0023] Si: 8.0%, Cr: 16.5%, C: 0.6%, Fe: 8.0%, B: 3.5%, and the balance is Ni.

[0024] (1) batching is carried out according to the proportioning ratio of above-mentioned composition design;

[0025] (2) In the medium frequency induction furnace, put C into the bottom of the furnace, put Ni, Fe and Cr blocks on it, when the above blocks are melted, put Si and B, and melt at 1520 ° C ~ 1560 ° C;

[0026] (3) Under the conditions of 850Kg pressure, 120L / min flow rate and 1560°C, the above-mentioned melt was atomized by high-pressure water. Laser particle size D of powder after atomization 50 It is about 30 microns (through a -200 mesh sieve), and the oxygen content is controlled within 450ppm.

[0027] The above-mentioned high-pressure water atomization equipment is a small-scale experimental equipment.

[0028] figure 1 It is the DSC curve of this ...

Embodiment 2

[0030] The formula of the present embodiment is by weight percentage, and concrete composition is as follows:

[0031] Si: 2.5%, Cr: 5.5%, C: 0.5%, Fe: 2.5%, P: 3.0%, and the balance is Ni.

[0032] Powder preparation method is with embodiment 1.

[0033] figure 2 It is the DSC curve of this composition Ni-Cr-P, and the test instrument is produced by the American NETZSCH company. The solid-liquid phase temperature ranges from 933.6°C to 1283.3°C, which obviously does not meet the design requirements.

Embodiment 3

[0035] The formula of the present embodiment is by weight percentage, and concrete composition is as follows:

[0036] Si: 2.5%, Cr: 4.5%, C: 0.5%, Fe: 2.5%, P: 2.5%, B: 1.5%, and the balance is Ni.

[0037] (1) batching is carried out according to the proportioning ratio of above-mentioned composition design;

[0038] (2) In the medium frequency induction furnace, put C into the bottom of the furnace, put Ni, Fe and Cr blocks on it, and when the above blocks are melted, put Si, B and P, and melt at 1520 ° C to 1560 ° C;

[0039] (3) Under the conditions of 500Kg pressure, 140L / min flow rate and 1560°C, the above-mentioned melt was atomized by high-pressure water. Laser particle size D of powder after atomization 50 The size is about 20 microns (through -200 mesh sieve), the oxygen content is controlled within 650ppm, and the bulk ratio is 2.47g / cm 3 , no mobility.

[0040] The above-mentioned high-pressure water atomization equipment is a small-scale experimental equipmen...

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Abstract

The invention discloses a nickel-based brazing material for a brazed diamond tool and a preparation method thereof, and belongs to the technical field of brazing. The brazing material is high-medium temperature Ni-Cr brazing material alloy powder used for the brazed diamond tool, and comprises the following chemical compositions in percentage by weight: 2.0 to 2.5 percent of Si, 4.0 to 4.5 percent of Cr, less than or equal to 0.7 percent of C, 2.0 to 20.0 percent of Fe, 2.0 to 2.5 percent of P, 1.0 to 1.5 percent of B, and the balance of Ni. By accurately controlling the content of B, Si, P and C on the basis of a Ni-Cr series and properly reducing the content of Cr, the brazing material has the advantages of good brazing performance, excellent holding force on the diamond and narrower sold-liquid phase range, namely the liquid phase temperature does not exceed 950 DEG C, the brazing temperature does not exceed 1,000 DEG C; and the diamond tool brazed by the brazing material has satisfied cutting efficiency and service life.

Description

technical field [0001] The invention belongs to the technical field of brazing, in particular to a nickel-based brazing material for brazing diamond tools and a preparation method thereof. technical background [0002] In electroplated diamond tools, the diamond particles are mechanically inlaid, easy to fall off, and arranged in disorder, with low protrusion and small chip space; in sintered diamond tools, the diamonds are arranged in disorder, and the diamond and matrix powder cannot be fully formed. Metallurgical combination, the problem of self-sharpening is also difficult to solve. On this basis, brazed diamond tools came into being, just to make up for the defects in the preparation of the above two kinds of diamond tools. There are many kinds of high-temperature nickel-based brazing materials, but not many are suitable for brazing diamond tools. Either the brazing temperature is too high (greater than 1000°C), or the performance of the brazing tools cannot meet the u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/40
Inventor 钟正刚王峻丁士安李斌麻洪秋金成海
Owner ADVANCED TECH BAZHOU SPECIAL POWDER CO LTD
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