Cubic crystal boron nitride sintered body cutting tool and manufacturing method thereof

A cubic boron nitride and cutting tool technology, applied in the field of cubic boron nitride sintered body cutting tools and their manufacturing, can solve the problems of low adhesion strength, shortened tool life, easy tool tip damage, etc., and improve wear resistance. sexual effect

Active Publication Date: 2018-11-23
MITSUBISHI MATERIALS CORP
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  • Summary
  • 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 on the tool tip, the tool tip will be easily chipped, and there is a problem that the tool life will be shortened.

Method used

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  • Cubic crystal boron nitride sintered body cutting tool and manufacturing method thereof
  • Cubic crystal boron nitride sintered body cutting tool and manufacturing method thereof
  • Cubic crystal boron nitride sintered body cutting tool and manufacturing method thereof

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 raw material by Ar and nitrogen) A method of forming a film by purging the compound, which 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 ) 2 ]...

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Abstract

PROBLEM TO BE SOLVED: To provide a cBN tool for exhibiting an excellent defect resistance and a chipping resistance even in an intermittent cutting work of high hardness steel and an excellent cutting performance over a long use.SOLUTION: A cubic crystal boron nitride sintered material cutting tool of having a tool base body containing cubic crystal boron nitride particles and a binder phase, wherein the ratio of nitride, boride, oxide and their solid solution of Ti, which are contained in the region of a range within 50nm from the surfaces of the cubic boron nitride particles, is 80vol % or more with respect to the whole volume of said region.

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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Patent Type & Authority Patents(China)
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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