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Diamond with intermetallic compound plating layer and preparing method of diamond

A technology of intermetallic compounds and diamonds, which is applied in the coating process and coating of metal materials, can solve the problems of limited bonding strength, high diamond shedding rate, and limited improvement of diamond holding effect, so as to enhance holding force and reduce shedding Effect

Inactive Publication Date: 2019-11-05
佛山市佛晶金属工具制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] But above-mentioned these prior art all have certain shortcoming to diamond treatment method, and diamond surface Ni, Cu coating and diamond just form mechanical cladding, and the existence of coating is limited to the raising of diamond holding effect; etc. Although chemical bonds are formed between the coating and the diamond, the bonding strength is limited, and the surface of the formed metal titanium coating is smooth. After long-term production practice, it is found that the diamond shedding rate is still high during use.

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  • Diamond with intermetallic compound plating layer and preparing method of diamond

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preparation example Construction

[0020] figure 1 A diamond preparation method with an intermetallic compound coating is shown, and a vacuum infiltration process is carried out on the basis of titanium plating on the diamond surface, comprising the following steps:

[0021] (1) The titanium powder and the diamond coated with a titanium metal layer are uniformly mixed according to the mass ratio to obtain a mixed powder layer, and are laid at intervals between multi-layer aluminum foil or aluminum plate layers to form a first assembly;

[0022] (2) Place the first assembly flat in a vacuum infiltration furnace, set process parameters, and obtain a second assembly with a spongy porous structure through vacuum infiltration. After the process is completed, cool to room temperature and take out the second assembly ;

[0023] (3) Crushing, sieving and grading, cleaning, and drying the second assembly to obtain a diamond coated with a TiAl-based intermetallic compound, which has an irregular icicle-like shape.

[0...

Embodiment 1

[0029] A method for preparing diamond with an intermetallic compound coating, comprising the following steps:

[0030] (1) Take 800 mesh titanium powder and 40 / 45 particle size diamond coated with a titanium metal layer on the surface, mix the titanium powder and diamond evenly at a mass ratio of 2:7, the thickness of the mixed powder is not less than the thickness of the aluminum foil, and the distance between the mixed powder Lay it between multiple layers of aluminum foil with a thickness of 1 mm to form the first combination of "aluminum foil-mixed powder-aluminum foil·······-mixed powder-aluminum foil".

[0031] (2) Place the first assembly flat in the vacuum infiltration furnace, set the vacuum infiltration process parameters as follows: temperature 700°C, holding time 60min, vacuum degree not less than 10×10 -1 Pa. The second assembly with a spongy porous structure is obtained through vacuum infiltration treatment, and the second assembly is taken out after cooling to ...

Embodiment 2

[0034] A method for preparing an intermetallic compound coating layer on a diamond surface, comprising the following steps:

[0035] (1) Take 400 mesh titanium powder and 70 / 80 particle size diamond coated with a titanium metal layer on the surface, mix the titanium powder and diamond evenly at a mass ratio of 3:5, the thickness of the mixed powder is not less than the thickness of the aluminum foil, and the distance between the mixed powder Lay it between multiple layers of aluminum foil with a thickness of 5mm to form the first combination of "aluminum foil-mixed powder-aluminum foil·······-mixed powder-aluminum foil".

[0036] (2) Place the first assembly flat in the vacuum infiltration furnace, set the vacuum infiltration process parameters as follows: temperature 780°C, holding time 120min, vacuum degree not less than 10×10 -1 Pa. The second assembly with a spongy porous structure is obtained through vacuum infiltration treatment, and the second assembly is taken out aft...

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Abstract

The invention discloses diamond with an intermetallic compound plating layer and a preparing method of the diamond. The preparing method comprises the steps of (1) mixing titanium powder and diamond of which the surface is plated with a titanium metal layer according to the mass ratio, and laying the mixture between multiple layers of aluminum foil layers or aluminum plate layers at intervals to form a first combination; (2) horizontally putting the first combination in a vacuum infiltration furnace, setting process parameters, and obtain a second combination of a sponge-shaped porous body structure through vacuum infiltration treatment; (3) conducting crushing, sieving grading, cleaning and drying on the second combination to obtain the diamond of which the surface is plated with a TiAl-series intermetallic compound. The surface of the diamond and the TiAl intermetallic compound are bonded through the formation of chemical bonds, and the diamond is in a shape of irregular ice thorns,and is provided with aluminum foil layers or aluminum plate layers and mixed powder layers, wherein the aluminum foil layers or aluminum plate layers and mixed powder layers are arranged at intervalsaccording to the sequence of the aluminum foil layers or aluminum plate layers, the mixed powder layers and the aluminum foil layers or aluminum plate layers. By means of the diamond, the holding capacity of the surface of the diamond can be increased, thus the holding capacity of a diamond abrasive tool binder on the diamond is increased, and the phenomenon that the diamond sheds during work is reduced.

Description

technical field [0001] The invention relates to the technical field of industrial diamond applications, in particular to a diamond with an intermetallic compound coating layer and a preparation method thereof. Background technique [0002] The surface energy of diamond is high, and there is a large difference in performance between the interface with most metals and non-metals. Therefore, in the manufacture of diamond tools, it is difficult to form effective wetting between diamond and the binder, and it is mostly in the form of mechanical inlays and coatings. A bond is formed with a low bond strength. During the use of diamond tools, diamonds often fall off prematurely due to insufficient holding force of diamonds, which seriously affects the utilization efficiency of diamonds and shortens the service life of diamond tools. [0003] In order to improve the utilization efficiency of diamond and prolong the service life of diamond tools, the most commonly used method is to m...

Claims

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Application Information

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IPC IPC(8): C23C26/02
CPCC23C26/02
Inventor 赵永骞罗雪赵伟涛李鹏程
Owner 佛山市佛晶金属工具制造有限公司