Cubic boron nitride sintering body cutting tool and manufacturing method of the same

A technology of cubic boron nitride and cutting tools, which is applied in the field of cubic boron nitride sintered cutting tools and its manufacturing, can solve the problems of low adhesion strength, easy chipping of the tool tip, shortened tool life, etc., and achieve improved wear resistance sexual effect

Active Publication Date: 2015-03-18
MITSUBISHI MATERIALS CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

AlB 2 Since the adhesion strength of AlN and cBN is low, if it is used in interrupted cutting with a large load

Method used

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  • Cubic boron nitride sintering body cutting tool and manufacturing method of the same
  • Cubic boron nitride sintering body cutting tool and manufacturing method of the same
  • Cubic boron nitride sintering body cutting tool and manufacturing method of the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0059] Production of cBN particles as raw material powder:

[0060] Using cBN particles with an average particle size of 0.5 to 8.0 μm as the substrate, the ALD method (Atomic Layer Deposition: which is to make the molecules of the raw material compound react layer by layer on the substrate in the vacuum chamber and repeat the process by Ar and nitrogen) The method of forming a film by purging the raw material compound is a kind of CVD method) It is coated with TiO to form a thin layer 2 Floor. More specifically, cBN particles with an average particle size of 0.5 to 8.0 μm are loaded into the furnace, and the temperature in the furnace is raised to 350° C., and Ti[N(CH 3 ) 2 ] 4 , and using H as the reactive gas 2 O, the following (1) to (4) is regarded as one cycle, and this cycle is repeated until the target layer thickness is reached, so that the surface of the cBN particle is coated with TiO with a predetermined layer thickness. 2 Floor.

[0061] (1)Ar+Ti[N(CH 3 ) ...

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Abstract

The invention provides a cubic boron nitride sintering body cutting tool that exhibits excellent defect resistance, and a manufacturing method of the same. The cutting tool is a cBN tool that still exhibits excellent defect resistance and breaking resistance even if continuously cutting and machining high-hardness steel, and that has an excellent cutting property even if being used for a long time. A sintering body comprising cubic boron nitride particles and a bonding phase serves as a tool base body of the cubic boron nitride sintering body cutting tool. Nitride, boride and oxide containing Ti and a solid solution of the nitride, boride and oxide, in an area within 50nm from the surfaces of the cubic boron nitride particles, account for more than 80vol% of the total volume of the area. In this way, the aim of the invention is achieved.

Description

technical field [0001] The present invention relates to a cBN sintered body cutting tool which takes cubic boron nitride (hereinafter referred to as cBN) as the main component and sinters it under ultra-high pressure and high temperature. A cBN sintered body cutting tool capable of suppressing the occurrence of chipping and chipping and maintaining excellent cutting performance over a long period of use in interrupted cutting of high-hardness steel made of hardened materials such as bearing steel and a method for manufacturing the same. Background technique [0002] Conventionally, cBN sintered body cutting tools using a cBN sintered body as a tool base are known as high-hardness steel cutting tools, and various proposals have been made for the purpose of improving tool life. [0003] For example, Patent Document 1 discloses a technique in which when a cBN sintered body is produced by ultra-high pressure sintering, a coating is formed on the surface of the cBN particles as h...

Claims

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Application Information

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IPC IPC(8): C04B35/583C04B35/622
Inventor 矢野雅大宫下庸介大桥忠一
Owner MITSUBISHI MATERIALS CORP
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