CN107434415B - Polycrystalline cubic boron nitride composite sheet with high thermal stability and good thermal conductivity and production method thereof - Google Patents

Polycrystalline cubic boron nitride composite sheet with high thermal stability and good thermal conductivity and production method thereof Download PDF

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CN107434415B
CN107434415B CN201710437687.9A CN201710437687A CN107434415B CN 107434415 B CN107434415 B CN 107434415B CN 201710437687 A CN201710437687 A CN 201710437687A CN 107434415 B CN107434415 B CN 107434415B
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cubic boron
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thermal stability
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申建中
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Jinhua Zhongye Superhard Material Composite Co ltd
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Abstract

The invention belongs to the technical field of superhard materials, and particularly relates to a polycrystalline cubic boron nitride composite sheet with high thermal stability and good thermal conductivity and a production method thereof. The product is obtained by adopting high-content nickel-plated cubic boron nitride particles and a bonding agent such as tungsten, cobalt, aluminum or aluminum ceramic, the nickel-plated cubic boron nitride particles have large granularity, high thermal conductivity, high concentration, excellent fracture toughness and impact resistance and high chemical inertia, and have longer service life, heat resistance and thermal stability in high-speed finish machining of difficult-to-cut materials such as quenched steel, cast iron, carbon steel, die steel and the like.

Description

Polycrystalline cubic boron nitride composite sheet with high thermal stability and good thermal conductivity and production method thereof
Technical Field
The invention belongs to the technical field of superhard materials, and particularly relates to a polycrystalline cubic boron nitride composite sheet with high thermal stability and good thermal conductivity and a production method thereof.
Background
At present, in high-speed finish machining of materials which are difficult to cut, such as quenched steel, cast iron, carbon steel and the like, the cutter machining materials are required to have high thermal stability and good thermal conductivity, and the cutter composite sheet materials such as polycrystalline diamond and the like are easy to break due to overhigh temperature in the cutting process, so that the working efficiency is influenced. The hardness of the cubic boron nitride is second to that of diamond, has high thermal stability and strong chemical stability, and can effectively replace a polycrystalline diamond compact as a material of a ferrous metal machining cutter.
At present, polycrystalline cubic boron nitride cutter manufacturers produced in China basically rely on imported polycrystalline cubic boron nitride composite sheet materials in developed countries in the western world, and the price is high. The existing production process is basically as follows; the polycrystalline cubic boron nitride layer is prepared from the following raw materials in parts by weight: 70-85 parts of cubic boron nitride micro powder, 10-15 parts of metal bonding agent and 5-10 parts of ceramic additive. The production method is carried out according to the following steps: A. mixing uniformly; B. and (3) putting the mixture and the hard alloy matrix into a molybdenum cup isolated by a salt tube shielding layer, heating and synthesizing. However, the thermal stability and thermal conductivity of the polycrystalline cubic boron nitride composite sheet produced by the existing process are to be further improved, so that there is a need for further research on the production process of the polycrystalline cubic boron nitride composite sheet.
Disclosure of Invention
The invention aims to provide a polycrystalline cubic boron nitride composite sheet with high thermal stability and good thermal conductivity and a production method thereof, so as to improve the thermal stability and the thermal conductivity of the polycrystalline cubic boron nitride composite sheet.
In order to solve the technical problems, the invention adopts the following technical scheme:
the polycrystalline cubic boron nitride composite sheet with high thermal stability and good thermal conductivity is prepared from the following raw materials: 80-87% of nickel-plated cubic boron nitride particles, 1-3% of aluminum powder, 1-3% of metal niobium, 1-5% of vanadium carbide and the balance of silicon powder.
Preferably, the nickel plated cubic boron nitride particles have a particle size of 2 to 4 microns.
Preferably, the diameter of the aluminum powder is less than 5 microns.
The invention relates to a production method of a polycrystalline cubic boron nitride composite sheet with high thermal stability and good thermal conductivity, which comprises the following steps: preparing raw materials by using a formula of 80-87% of nickel-plated cubic boron nitride particles, 1-3% of aluminum powder, 1-3% of metal niobium, 1-5% of vanadium carbide and the balance of silicon powder, mixing the raw materials together for 8-15 hours, and synthesizing the polycrystalline cubic boron nitride composite sheet with high thermal stability and good thermal conductivity in a cubic hydraulic press with a cylinder diameter of 750 under the conditions of 90-100MPa and 1400-1600 ℃ after assembly for 30-50 minutes.
The invention has the following beneficial effects:
1. the product obtained by adopting high-content nickel-plated cubic boron nitride particles and a bonding agent such as tungsten, cobalt, aluminum or aluminum ceramic has the advantages of large granularity, high thermal conductivity, high concentration, excellent fracture toughness and impact resistance, high chemical inertness, longer service life, higher heat resistance and higher thermal stability in high-speed finish machining of difficult-to-cut materials such as quenched steel, cast iron, carbon steel, die steel and the like.
2. The invention adopts tungsten, cobalt, aluminum and other diversified catalyst systems to synthesize the cubic boron nitride crystal, which can increase the reaction activity of the system and promote the growth speed of the cubic boron nitride crystal.
3. The invention adopts a plurality of catalyst combinations to produce cubic boron nitride crystals with various colors (different grades).
4. The invention can effectively ensure the growth integrity of the cubic boron nitride crystal through high-temperature impurity removal.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The invention relates to a polycrystalline cubic boron nitride composite sheet with high thermal stability and good thermal conductivity, which comprises the following steps: preparing raw materials by using a formula of 80% of nickel-plated cubic boron nitride particles, 1% of aluminum powder, 3% of metal niobium, 5% of vanadium carbide and the balance of silicon powder, mixing the raw materials together for 8 hours, and synthesizing the polycrystalline cubic boron nitride composite sheet with high thermal stability and good thermal conductivity in a cubic hydraulic press with a cylinder diameter of 750 under the conditions of 100MPa and 1600 ℃ after assembly, wherein the synthesis time is 30 minutes.
Wherein the grain size of the cubic boron nitride grain of the cubic nickel plating is 2.5 microns; the diameter of the aluminum powder is 5 microns.
The production method adopts the product obtained by high-content nickel-plated cubic boron nitride particles and a bonding agent such as tungsten, cobalt, aluminum or aluminum ceramic, the nickel-plated cubic boron nitride particles have large granularity, high thermal conductivity, high concentration, excellent fracture toughness and impact resistance and high chemical inertness, and have longer service life, heat resistance and heat stability in the high-speed finish machining of difficult-to-cut materials such as quenched steel, cast iron, carbon steel, die steel and the like.
Example 2
The invention relates to a polycrystalline cubic boron nitride composite sheet with high thermal stability and good thermal conductivity, which comprises the following steps: preparing raw materials by using a formula of 82% of nickel-plated cubic boron nitride particles, 1.4% of aluminum powder, 1.8% of metal niobium, 2.5% of vanadium carbide and the balance of silicon powder, mixing the raw materials together for 0111 hour, and synthesizing the polycrystalline cubic boron nitride composite sheet with high thermal stability and good thermal conductivity in a cubic hydraulic press with a cylinder diameter of 750 under the conditions of 92MPa and 1450 ℃ after assembly, wherein the synthesis time is 40 minutes.
Wherein the grain size of the cubic boron nitride grain of the cubic nickel plating is 3.5 microns; the diameter of the aluminum powder is 4.9 microns.
The production method adopts the product obtained by high-content nickel-plated cubic boron nitride particles and a bonding agent such as tungsten, cobalt, aluminum or aluminum ceramic, the nickel-plated cubic boron nitride particles have large granularity, high thermal conductivity, high concentration, excellent fracture toughness and impact resistance and high chemical inertness, and have longer service life, heat resistance and heat stability in the high-speed finish machining of difficult-to-cut materials such as quenched steel, cast iron, carbon steel, die steel and the like.
Example 3
The invention relates to a polycrystalline cubic boron nitride composite sheet with high thermal stability and good thermal conductivity, which comprises the following steps: preparing raw materials by using a formula of 84% of nickel-plated cubic boron nitride particles, 1.8% of aluminum powder, 2.6% of metal niobium and 2% of vanadium carbide and the balance of silicon powder, mixing the raw materials together for 14 hours, and synthesizing the polycrystalline cubic boron nitride composite sheet with high thermal stability and good thermal conductivity in a cubic hydraulic press with a cylinder diameter of 750 under the conditions of 94MPa and 1540 ℃ after assembly, wherein the synthesis time is 50 minutes.
Wherein the grain size of the cubic boron nitride grain of the cubic nickel plating is 2 microns; the diameter of the aluminum powder is 3.9 microns.
The production method adopts the product obtained by high-content nickel-plated cubic boron nitride particles and a bonding agent such as tungsten, cobalt, aluminum or aluminum ceramic, the nickel-plated cubic boron nitride particles have large granularity, high thermal conductivity, high concentration, excellent fracture toughness and impact resistance and high chemical inertness, and have longer service life, heat resistance and heat stability in the high-speed finish machining of difficult-to-cut materials such as quenched steel, cast iron, carbon steel, die steel and the like.
Example 4
The invention relates to a polycrystalline cubic boron nitride composite sheet with high thermal stability and good thermal conductivity, which comprises the following steps: preparing raw materials according to a formula of 85% of nickel-plated cubic boron nitride particles, 2.2% of aluminum powder, 2% of metal niobium, 3% of vanadium carbide and the balance of silicon powder, mixing the raw materials together for 15 hours, and synthesizing the polycrystalline cubic boron nitride composite sheet with high thermal stability and good thermal conductivity in a cubic hydraulic press with a cylinder diameter of 750 under the conditions of 98MPa and 1400 ℃ after assembly, wherein the synthesis time is 35 minutes.
Wherein the grain size of the cubic boron nitride grain of the cubic nickel plating is 2.8 microns; the diameter of the aluminum powder is 4.5 microns.
The production method adopts the product obtained by high-content nickel-plated cubic boron nitride particles and a bonding agent such as tungsten, cobalt, aluminum or aluminum ceramic, the nickel-plated cubic boron nitride particles have large granularity, high thermal conductivity, high concentration, excellent fracture toughness and impact resistance and high chemical inertness, and have longer service life, heat resistance and heat stability in the high-speed finish machining of difficult-to-cut materials such as quenched steel, cast iron, carbon steel, die steel and the like.
Example 5
The invention relates to a polycrystalline cubic boron nitride composite sheet with high thermal stability and good thermal conductivity, which comprises the following steps: the preparation method comprises the steps of preparing raw materials according to a formula that 87% of nickel-plated cubic boron nitride particles, 3% of aluminum powder, 1% of niobium metal, 4% of vanadium carbide and the balance of silicon powder, mixing the raw materials together for 2111 hour, assembling, and synthesizing the polycrystalline cubic boron nitride composite sheet with high thermal stability and good thermal conductivity in a cubic hydraulic press with a cylinder diameter of 750 under the conditions of 90MPa and 1500 ℃ for 45 minutes.
Wherein the grain size of the cubic boron nitride grain of the cubic nickel plating is 3 microns; the diameter of the aluminum powder is 4 microns.
The production method adopts the product obtained by high-content nickel-plated cubic boron nitride particles and a bonding agent such as tungsten, cobalt, aluminum or aluminum ceramic, the nickel-plated cubic boron nitride particles have large granularity, high thermal conductivity, high concentration, excellent fracture toughness and impact resistance and high chemical inertness, and have longer service life, heat resistance and heat stability in the high-speed finish machining of difficult-to-cut materials such as quenched steel, cast iron, carbon steel, die steel and the like.
It is to be understood that the exemplary embodiments described herein are illustrative and not restrictive. While one or more embodiments of the present invention have been described, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.

Claims (1)

1. The polycrystalline cubic boron nitride composite sheet with high thermal stability and good thermal conductivity is characterized by being prepared from the following raw materials: the production method of the polycrystalline cubic boron nitride composite sheet comprises the following steps of 80-87% of nickel-plated cubic boron nitride particles, 1-3% of aluminum powder, 1-3% of metal niobium, l-5% of vanadium carbide and the balance of silicon powder, wherein the diameter of the nickel-plated cubic boron nitride particles is 2-4 microns, the diameter of the aluminum powder is less than 5 microns, and the production method of the polycrystalline cubic boron nitride composite sheet with high thermal stability and good thermal conductivity comprises the following steps: preparing raw materials by using a formula of 80-87% of nickel-plated cubic boron nitride particles, l-3% of aluminum powder, 1-3% of metal niobium, 1-5% of vanadium carbide and the balance of silicon powder, mixing the raw materials together for 8-15 hours, and synthesizing the polycrystalline cubic boron nitride composite sheet with high thermal stability and good thermal conductivity in a cubic hydraulic press with a cylinder diameter of 750 under the conditions of 90-100MP and 1400-1600 ℃ after assembly for 30-50 minutes.
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JP2005132654A (en) * 2003-10-29 2005-05-26 Sumitomo Electric Ind Ltd Ceramic composite material and its manufacturing process
US20100009839A1 (en) * 2006-06-09 2010-01-14 Antionette Can Ultrahard Composite Materials
WO2008072180A2 (en) * 2006-12-11 2008-06-19 Element Six (Production) (Pty) Ltd Cubic boron nitride compacts
CN101560624B (en) * 2009-05-18 2010-12-29 河南富耐克超硬材料有限公司 Method for preparing polycrystalline cubic boron nitride
JP6257896B2 (en) * 2009-08-04 2018-01-10 アロメット コーポレイション Consolidated high toughness coated hard particles in high toughness matrix materials.
CN102834210A (en) * 2010-04-08 2012-12-19 株式会社图格莱 Composite body
CN102050633B (en) * 2010-11-14 2013-02-13 河南工业大学 Polycrystalline cubic boron nitride compact toughened by Ni-plated Si3N4 whisker and preparation method thereof
WO2013069657A1 (en) * 2011-11-07 2013-05-16 株式会社タンガロイ Cubic boron nitride sintered body
JP6082650B2 (en) * 2013-04-26 2017-02-15 株式会社タンガロイ Cubic boron nitride sintered body and coated cubic boron nitride sintered body
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Denomination of invention: A polycrystalline cubic boron nitride composite sheet with high thermal stability and good thermal conductivity and its production method

Granted publication date: 20201002

Pledgee: Bank of Jinhua Limited by Share Ltd. science and Technology Branch

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