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A polycrystalline cubic boron nitride composite sheet for high-end cutting tools and its production method

A technology of cubic boron nitride and polycrystalline cubic, which is applied in polycrystalline cubic boron nitride composite sheets for high-end cutting tools and its production field, can solve problems such as edge cracking, unsuitable processing of ferrous metal materials, and reduced durability, and achieve The effect of stabilizing the bonding strength, expanding the synthesis temperature range, and improving the bonding consistency

Active Publication Date: 2020-04-21
JINHUA ZHONGYE SUPERHARD MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cutting in and out from the end face of the workpiece, especially when there are slag inclusions, sand holes, and unevenness on the surface, impacts are most likely to occur, causing the cutting edge to break and resulting in reduced durability
Therefore, the existing PCBN tools are not suitable for processing softer ferrous metal materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A production method of polycrystalline cubic boron nitride composite sheets for high-end cutting tools of the present invention comprises the following steps: mixing 85% of cubic boron nitride particles and 5% of titanium carbonitride for 15 minutes, and then adding 5% of Mix urea for 25 minutes, then add 5% vanadium carbide and mix for 6 hours, after accurate weighing, assemble and press, at 1000°C and high vacuum for 10 -4 Annealed under the condition of Pa for 3.4 hours, under the conditions of 100MPa and 1600°C, synthesized polycrystalline cubic boron nitride composite sheets for high-end cutting tools in a six-sided hydraulic press with a cylinder diameter of 750, and the synthesis time was 50 minutes.

[0017] Among them, the average particle size of cubic boron nitride particles is 1 micron; the average particle size of titanium carbon nitrogen is 1 micron; the average particle size of vanadium carbide is 2 microns.

[0018] The above production method expands th...

Embodiment 2

[0020] A production method of polycrystalline cubic boron nitride composite sheets for high-end cutting tools of the present invention comprises the following steps: mixing 96% of cubic boron nitride particles and 2% of titanium carbonitride for 17 minutes, and then adding 1% of Mix urea for 15 minutes, then add 1% vanadium carbide and mix for 7 hours, after accurate weighing, assemble and press, at 800°C and high vacuum for 10 -4 Annealed under the condition of Pa for 3 hours, under the conditions of 96MPa and 1450°C, synthesized polycrystalline cubic boron nitride composite sheets for high-end cutting tools in a six-sided hydraulic press with a cylinder diameter of 750, and the synthesis time was 46 minutes.

[0021] Among them, the average particle size of cubic boron nitride particles is 1.2 microns; the average particle size of titanium carbon nitrogen is 0.9 microns; the average particle size of vanadium carbide is 2.5 microns.

[0022] The above production method expand...

Embodiment 3

[0024] A production method of polycrystalline cubic boron nitride composite sheets for high-end cutting tools of the present invention comprises the following steps: mixing 91% of cubic boron nitride particles and 4% of titanium carbonitride for 19 minutes and then adding 3% of Mix urea for 17 minutes, then add 2% vanadium carbide and mix for 8 hours, after accurate weighing, assemble and press, at 840°C and high vacuum for 10 -4 Annealed under the condition of Pa for 3.8 hours, under the conditions of 95MPa and 1540°C, synthesized polycrystalline cubic boron nitride composite sheets for high-end cutting tools in a six-sided hydraulic press with a cylinder diameter of 750, and the synthesis time was 42 minutes.

[0025] Among them, the average particle size of cubic boron nitride particles is 1.4 microns; the average particle size of titanium carbon nitrogen is 0.8 microns; the average particle size of vanadium carbide is 3 microns.

[0026] The above production method expands...

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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 for a high-end cutting tool and a production method of the polycrystalline cubic boron nitride composite sheet. The method comprises the following steps: firstly, mixing 85 to 96 percent of cubic boron nitride particles with 2 to 5 percent of titanium carbonitride for 15 to 25 minutes, and then adding 1 to 5 percent of urea and mixing for 15 to 25 minutes; secondly, adding 1 to 5 percent of vanadium carbide, mixing for 6 to 10 hours, carrying out precise weighing, and then assembling and pressing; annealing for 3 to 5 hours under the conditions that the temperature is 800 to 1000 DEG C and high vacuum is 10 to 4 Pa; thirdly, under the conditions that the pressure intensity is 95 to 100 MPa and the temperature is 1400 to 1600 DEG C, synthesizing the polycrystalline cubic boron nitride composite sheet for the high-end cutting tool in a cubic press with the cylinder diameter of 750, wherein the synthetic time is 30 to 50 minutes. According to the production method disclosed by the invention, the synthetic temperature range is extended, the bonding strength of a synthetic crystal is stabilized and the bonding uniformity between cubic boron nitride and an adhesive is improved.

Description

technical field [0001] The invention belongs to the technical field of superhard materials, and in particular relates to a polycrystalline cubic boron nitride composite sheet for high-end cutting tools and a production method thereof. Background technique [0002] Polycrystalline cubic boron nitride composite cutting tools can process hardened steel, die steel, tool steel, alloy steel, gray iron, white iron and other hard alloys, ceramics and other materials that are difficult to process with traditional tools with a hardness above HRC60, and It has its unique characteristics and application cases in interrupted cutting and rough machining. It is suitable for general machine tools, special machine tools, automatic lines and CNC machine tools, and is widely used in cutting processing in military industry, automobile, metallurgical rolls, bearings, molds and other industries. Its service life is 5 to 25 times that of cemented carbide tools, and its high wear resistance greatl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/5831C04B35/5835C04B35/645
CPCC04B35/5831C04B35/645C04B2235/3839C04B2235/3856C04B2235/5436C04B2235/5445
Inventor 申建中
Owner JINHUA ZHONGYE SUPERHARD MATERIALS CO LTD