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Self-sharpening diamond tool and preparation method thereof

A diamond tool, sharp technology, applied in the field of machinery, can solve the problems of high hardness of the metal adhesive layer, limited bonding strength between the hard phase coating and the substrate, and the limitation of the hard phase coating on the brazing of the steel substrate, so as to achieve simplification The effect of processing technology and getting rid of technical shackles

Active Publication Date: 2020-06-19
苏州昆腾威新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the hardness of the metal adhesive layer is too high, it is easy to peel off, and if the hardness is too low, it cannot meet the needs of cutting and cutting applications.
Harvesting / cutting knives currently used in the market are basically limited by the structure of the steel matrix brazed hard phase coating
Its main failure mode is fracture and wear, which is mainly limited by the bonding strength of the hard phase coating and the substrate.

Method used

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  • Self-sharpening diamond tool and preparation method thereof
  • Self-sharpening diamond tool and preparation method thereof

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preparation example Construction

[0022] Another aspect of the embodiments of the present invention provides a method for preparing a self-sharpening diamond tool, comprising:

[0023] (1) Provide the tool base;

[0024] (2) Apply nickel-iron brazing filler metal and diamond raw material to the surface of the cutter base to form a self-sharpening layer;

[0025] (3) In a protective atmosphere, the matrix / self-sharp layer composite structure finally obtained in step (2) is continuously brazed through an automatic mesh belt furnace with a controllable atmosphere, and then post-processed to obtain a self-sharp diamond tool ; Wherein, the brazing process is first raised to 900-1100°C at a heating rate of 6-10°C / min, and kept at a temperature of 900-1100°C for 20-30min, and then at a heating rate of 20-30°C / min The rate is raised to 1100-1300°C, and the temperature is kept at 1100-1300°C for 40-60 minutes.

[0026] In some preferred versions of the embodiments of the present invention, step (2) may include: apply...

Embodiment 1

[0040]A self-sharpening diamond tool, which is processed with 65Mn steel as the base material to have two opposite sides, and the side is provided with a first cutting surface, a second cutting surface and a blade formed by the intersection of the first cutting surface and the second cutting surface The structure of the part; the mixture of BNi2 and BNi7 with a mass ratio of 1:1 is used as the nickel-based solder, and 1000 mesh carbonyl iron powder with a mass content of 10% is added to form the nickel-iron solder; appropriate amount of pure water and yellow Raw gum; under the condition of heating and stirring, add xanthan gum into pure water to disperse; obtain a brazing solvent system; add nickel-iron solder into the solvent system for dispersion in three times to obtain the final paste nickel-iron solder; Mix the diamond with a particle size of 300 mesh and the paste nickel-iron solder at a mass ratio of 1: 12 to obtain a mixture; coat the side of the substrate with a mixtur...

Embodiment 2

[0044] A self-sharpening diamond tool, which is processed with 65Mn steel as the base material to have two opposite sides, and the side is provided with a first cutting surface, a second cutting surface and a blade formed by the intersection of the first cutting surface and the second cutting surface The structure of the part; adopt BNi2 as the nickel-based solder, add 1000 mesh carbonyl iron powder with a mass content of 5%, to form a nickel-iron solder; weigh an appropriate amount of pure water and xanthan gum; under heating and stirring conditions, the yellow The raw rubber is added into pure water to disperse; to obtain a brazing solvent system; the nickel-iron solder is added to the solvent system three times for dispersion to obtain the final paste nickel-iron solder; the particle size is 900 mesh diamond and paste nickel The iron solder is mixed according to the mass ratio of 1:16 to obtain the mixture; the mixture with a thickness of 0.7mm is coated on the side of the s...

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Abstract

The invention discloses a self-sharpening diamond tool and a preparation method thereof. The self-sharpening diamond tool comprises a tool substrate and a self-sharpening layer arranged on the tool substrate; the self-sharpening layer is formed by a nickel iron solder and a diamond raw material; and the nickel iron solder comprises a mixture of a standard nickel-based brazing alloy and iron in themass ratio of (10 to 20) to 1. The straw crushing tool disclosed by the invention is provided with the self-sharpening layer with a certain thickness; good metallurgical bonding is formed between thenickel iron solder and a substrate material in a welding manner; meanwhile, the nickel iron solder and the diamond raw material can interpenetrate each other in a welding process to form good chemical bond bonding, so that the tool is kept sharp all the time; a self-sharpening effect is achieved; and the service life of the self-sharpening diamond tool is greatly prolonged.

Description

technical field [0001] The invention belongs to the technical field of machinery, and in particular relates to a self-sharpening diamond tool and a preparation method thereof. Background technique [0002] Diamond is currently the hardest material found in the world and widely used in industry. It has excellent hardness, stiffness, wear resistance and thermal stability, so it is widely used in various cutting tools. The use of diamond as a reinforcing material to extend the service life of cutting tools is widely used. At present, the processing of diamond tools is mainly based on powder metallurgy and brazing; the powder metallurgy process is complex and requires high equipment, so the cost of the product is relatively high; the brazing method is affected by the characteristics of diamond itself, and only vacuum brazing can be used. welding, laser brazing, and induction brazing, but the efficiency of the above-mentioned brazing method is low, and a large-scale assembly-lin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B27/14B23K1/008B23K1/00
CPCB23B27/14B23B2226/31B23K1/0008B23K1/008
Inventor 盛洪超王蕾杨奇佳
Owner 苏州昆腾威新材料科技有限公司
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