Gradient composite cubic boron nitride material and preparation technology and application thereof

A cubic boron nitride, gradient technology, used in other manufacturing equipment/tools, turbines, engine components, etc., can solve problems such as unsatisfactory overall performance, reduce residual tensile stress, improve toughness and wear resistance, and excellent mechanical properties. performance effect

Active Publication Date: 2019-11-19
四川英诺航空科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventors have found that the overall performance of the current homogeneous cubic boron nitride material is still not ideal, especially the mechanical properties of the material such as flexural strength, wear resistance and toughness

Method used

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  • Gradient composite cubic boron nitride material and preparation technology and application thereof
  • Gradient composite cubic boron nitride material and preparation technology and application thereof
  • Gradient composite cubic boron nitride material and preparation technology and application thereof

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preparation example Construction

[0034] The gradient cubic boron nitride tool material of the present invention has a 3-layer symmetrical gradient structure (such as figure 2 shown) as an example, the present invention provides some embodiments, the volume percentage of each component raw material is: CBN 70-80vol.%, TiC10vol.%, Al 5-10vol.% and Co 5-10vol.%. The layer thickness ratio is selected as 0.2-0.6, and the composition gradient between layers is 2vol.%-10vol.%. For example, the gradient of cubic boron nitride is 4vol.%-10vol.%, and the gradient of aluminum and cobalt is 2vol.%- 5vol.%. The powder is loaded into the molybdenum cup by layering and filling, and the cubic boron nitride tool material is synthesized by high temperature and high pressure. The specific preparation methods include:

[0035] Put TiC, Al and Co into ball mill jars respectively, with cemented carbide balls as grinding balls and absolute ethanol as medium, the mass ratio of grinding balls to powder is 20:1, and the ball millin...

Embodiment 1

[0037] Prepare a gradient cubic boron nitride cutter with a layer thickness ratio of 0.3, a number of layers of 3, an interlayer CBN composition gradient of 6vol.%, and an Al and Co composition gradient of 3vol.%. The ingredients are shown in Table 1, given The volume percentage (vol.%) of the components of the C1 (surface layer) and C2 (middle layer) two groups of mixed powders is shown.

[0038] Table 1

[0039]

[0040] Put TiC, Al and Co into ball mill jars respectively, with cemented carbide balls as grinding balls and absolute ethanol as medium, the mass ratio of grinding balls to powder is 20:1, and the ball milling time is 48h; The suspension is dried in a vacuum drying oven at 110°C, passed through a 200-mesh sieve after drying, and packaged for later use; mix all the powders according to the volume ratio, pass the quality control layer thickness, and put the weighed powder into the molybdenum cup layer by layer According to the order of C1 / C2 / C1, each layer of po...

Embodiment 2

[0042] Prepare a gradient cubic boron nitride tool with a layer thickness ratio of 0.3, a number of layers of 3, an interlayer CBN composition gradient of 4vol.%, and an Al and Co composition gradient of 2vol.%. The ingredients are shown in Table 2, given The volume percentage (vol.%) of the three groups of mixed powders of C1 (surface layer) and C3 (middle layer) are shown

[0043] Table 2

[0044]

[0045] Put TiC, Al and Co into ball mill jars respectively, with cemented carbide balls as grinding balls and absolute ethanol as medium, the mass ratio of grinding balls to powder is 20:1, and the ball milling time is 48h; The suspension is dried in a vacuum drying oven at 110°C, passed through a 200-mesh sieve after drying, and packaged for later use; mix all the powders according to the volume ratio, pass the quality control layer thickness, and put the weighed powder into the molybdenum cup layer by layer According to the order of C1 / C3 / C1, each layer of powder needs to b...

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Abstract

The invention provides a gradient composite cubic boron nitride material and a preparation technology and application thereof. The material is manufactured by sintering cubic boron nitride, titanium carbide, aluminum and cobalt as raw materials, and material is of three layers of symmetric gradient structures symmetric about the middle layer, wherein the material is prepared from, by volume, 70-80% of cubic boron nitride, 10% of titanium carbide, 5-10% of aluminum and 5-10% of cobalt, wherein the cubic boron nitride is adopted as a matrix, the titanium carbide is adopted as a ceramic binding agent, and aluminum and cobalt are adopted as metal binding agents. The raw material component contents of symmetric layers symmetric about the middle layer are the same, and the thickness is symmetrically distributed. The material has the high tenacity and corrosion resistance, a tool better adapts to high-speed cutting and wear-resisting part machining, and the wider application prospect is achieved.

Description

technical field [0001] The invention relates to the technical field of mechanical cutting tool manufacturing, in particular to a gradient composite cubic boron nitride material and its preparation process and application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the development of science and technology, wear-resistant materials and high-hardness and difficult-to-machine alloys are widely used, and it is difficult for ordinary tools to process such materials. The application of superhard cutting tools can not only achieve high processing efficiency and high stability, but also greatly reduce the processing cost of workpieces. Superhard cutting tools have becom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/02B22F3/14B22F5/00C22C29/16
CPCB22F3/14B22F5/00B22F7/02B22F2005/001B22F2999/00C22C26/00C22C2026/006B22F2207/03
Inventor 邹斌云昊邢宏宇王鹏丁守岭王军黄传真
Owner 四川英诺航空科技有限公司
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