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Method for cubic boron nitride micro-powder particle surface metallization modifying

A technology of cubic boron nitride micropowder and boron nitride micropowder, which is applied in metal material coating technology, ion implantation plating, coating, etc., can solve problems limited to surface metallization modification by chemical methods, and achieve Improve thermal stability and chemical stability, environmental friendliness, good effect

Active Publication Date: 2017-03-22
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There have been some studies on the surface metallization modification of superhard powder at home and abroad, but they are all aimed at relatively coarse-grained superhard powder: the particle size of the existing surface metallization modified cubic boron nitride particles is generally above 10 μm , mainly used in stone processing tools, drilling tools for oil and gas exploration and extraction, mining and construction engineering tools, polycrystalline cubic boron nitride cutting tools and other fields, and the modification method is limited to surface metallization modification by chemical methods; The particle size of the cubic boron nitride micropowder used to prepare cubic boron nitride and cemented carbide composite cutting tools is less than 3.0 μm. The research, development and application of metallization modification have not been reported

Method used

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Embodiment 1

[0033] The surface metallization modification method and process flow of cubic boron nitride micropowder particles in the embodiment of the present invention are as follows:

[0034] 1. Coating Mo film on the surface of cubic boron nitride micropowder particles by magnetron sputtering method: 600 grams such as figure 1 The cubic boron nitride micropowder with a particle size of ≤3.0μm is cleaned first, and then put into the drum deposition table of the coating machine, and the Mo target is loaded on the cathode target, because the metal Mo is a weak magnetic conductor, so Select DC power. Pre-pump the background vacuum to 3.0×10 -3 Below Pa, enter the working gas Ar gas, and set the coating parameters: the sputtering pressure is maintained at 0.3-0.8Pa, the sample heating temperature is 100°C, and the target power density is 20W / cm 2 , the rotational speed of the drum-type deposition table is set at 15-20r / min, the vibration frequency of the vibration system is 35Hz, and the...

Embodiment 2

[0039] The surface metallization modification method and process flow of cubic boron nitride micropowder particles in the embodiment of the present invention are as follows:

[0040] 1. Coating W film on the surface of cubic boron nitride micropowder particles by magnetron sputtering method: 1500 grams of purchased cubic boron nitride micropowder with a particle size of ≤3.0 μm is firstly cleaned on the surface of the particles, and then put into the drum deposition table of the coating machine , Put the W target on the cathode target, because the metal W is a weak magnetic conductor, so choose a DC power supply. Pre-pump the background vacuum to 3.0×10 -3 Below Pa, enter the working gas Ar gas, and set the coating parameters: the sputtering pressure is maintained at 0.1-0.5Pa, the sample heating temperature is 400°C, and the target power density is 30W / cm 2 , the rotational speed of the drum-type deposition table is set at 40-50r / min, the vibration frequency of the vibration...

Embodiment 3

[0045] The surface metallization modification method and process flow of cubic boron nitride micropowder particles in the embodiment of the present invention are as follows:

[0046] 1. Coating Mo-Co alloy film on the surface of cubic boron nitride micropowder particles by magnetron sputtering method: 1500 grams of purchased cubic boron nitride micropowder with a particle size of ≤3.0 μm is firstly cleaned on the surface of the particles, and then put into the drum of the coating machine In the type deposition table, the Mo target and the Co target are respectively installed on two opposite cathode targets. Since Mo and Co are both magnetic conductors, DC magnetron sputtering is selected for coating. Pre-pump the background vacuum to 3.0×10 -3 Below Pa, enter the working gas Ar gas, and set the magnetron sputtering coating parameters: the air pressure is maintained at 6-10Pa, the sample heating temperature is 300°C, and the Mo target power density is 22W / cm 2 , Co target powe...

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Abstract

The invention relates to a method for cubic boron nitride micro-powder particle surface metallization modifying and belongs to the application field of superhard materials. The method comprises the following steps that film coating is conducted on the cubic boron nitride micro-powder particle surface through a physical vapor deposition method; metal or alloy cathode target materials are put into a target material chamber of physical vapor deosition equipment, and then cubic boron nitride micro-powder is put into a roller type deposition table; a door of a film coating chamber is closed, a vapor deposition parameter is set, and physical vapor deposition film coating is conducted; and a heat treatment is conducted on the cubic boron nitride micro-powder after film coating in a vacuum heat treatment furnace, and then cubic boron nitride particle powder with surface metallization modifying is obtained. According to the method, the applicable material range is wide, operation is simple, environment friendliness is achieved, and energy consumption is low; the plated coating is uniform and integrated and not liable to fall off, and large-scale production is realized; and the thermostability and chemical stability of cBN micro-powder particles after surface metallization modifying are improved.

Description

technical field [0001] The invention relates to a method for metallizing and modifying the surface of cubic boron nitride micropowder particles, belonging to the application field of superhard materials. Background technique [0002] Diamond and cubic boron nitride are two of the hardest materials known in nature, and they are classified as superhard materials. Cubic boron nitride is a material second only to diamond in hardness. Its wear resistance, thermal stability, and chemical inertness to ferrous metals are all superior to diamond, so it is more and more widely used in industries. [0003] In recent years, the development of modern processing and manufacturing industry has put forward higher requirements for cutting tools, especially the high-efficiency and high-precision machining of some difficult-to-machine materials (such as nickel-based alloys, titanium alloys, hardened steel, high-silicon aluminum alloys, etc.) has exceeded Therefore, cutting tools with superhar...

Claims

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Application Information

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IPC IPC(8): C23C14/34C23C14/06C23C14/58
Inventor 林晨光左冬华曹瑞军林中坤谢兴铖
Owner GRIMAT ENG INST CO LTD
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