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Cubic boron nitride sintered body and coated cubic boron nitride sintered body

A technology of cubic boron nitride and sintered body is applied in the fields of cubic boron nitride sintered body and coated cubic boron nitride sintered body, which can solve the problems of low affinity of cubic boron nitride and achieve excellent resistance to Abrasion, extended tool life effect

Active Publication Date: 2017-09-26
TUNGALOY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, cubic boron nitride has the feature of low affinity with iron

Method used

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  • Cubic boron nitride sintered body and coated cubic boron nitride sintered body
  • Cubic boron nitride sintered body and coated cubic boron nitride sintered body
  • Cubic boron nitride sintered body and coated cubic boron nitride sintered body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Use relative to ZrO by 2 Overall 3mol% Y was added 2 o 3 The obtained ZrO with an average particle size of 40nm 2 ZrO with an average particle size of 0.6 μm formed by agglomeration of particles (primary particles) 2 (PSZ) powder, by relative to ZrO 2 Overall 10mol% Y was added 2 o 3 The obtained ZrO with an average particle size of 40nm 2 ZrO with an average particle size of 0.6 μm formed by agglomeration of particles (primary particles) 2 (FSZ) powder and Al powder with an average particle diameter of 4.0 μm were mixed according to the composition shown in Table 1. In addition, for Comparative Products 1 to 4, 8, and 10, composite powder was not prepared.

[0085] Table 1

[0086]

[0087] Combine the raw material powder with ZrO 2 The pellets and the hexane solvent were put together into a cylinder for a ball mill, and ball milling was performed for 24 hours. After compacting the mixed powder obtained by mixing with a ball mill, at 1.33×10 -3 Pre-sinteri...

Embodiment 2

[0123] The surfaces of Invention Products 1 to 15 of Example 1 were coated using a PVD apparatus. The samples in which the surface of the cubic boron nitride sintered bodies of Inventions 1 to 5 were coated with a TiN layer with an average layer thickness of 3 μm were set as Inventions 16 to 20, and the cubic boron nitride sintered bodies of Inventions 6 to 10 were The samples in which the surface of the boron sintered body was coated with a TiAlN layer having an average layer thickness of 3 μm were designated as Invention Products 21 to 25. On the surface of the cubic boron nitride sintered body of Invention Products 11 to 15, 500 layers of TiAlN with a thickness of 3 nm per layer and TiAlNbWN with a thickness of 3 nm per layer were alternately laminated 500 times, and the samples in which the alternate layered layers were thus coated Set as invention products 26-30. The same cutting test as in Example 1 was performed on Invention Products 16 to 30. The results are shown in...

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Abstract

Provided are a cubic boron nitride sintered body and a coated cubic boron nitride sintered body, which elongate the service life of a tool by having improved wear resistance. A cBN sintered body which is composed of from 40% by volume to 85% by volume (inclusive) of cBN, from 15% by volume to 60% by volume (inclusive) of a binder phase, and unavoidable impurities. The binder phase contains: an Al compound that is composed of elemental Al and at least one element selected from among N, O and B; and a Zr compound that is composed of elemental Zr and at least one element selected from among C, N, O and B. The Zr compound contains ZrO, or ZrO and ZrO2; and if I1 is the peak intensity of the (111) plane of ZrO, I2t is the peak intensity of the (101) plane of the tetragonal ZrO2 and I2c is the peak intensity of the (111) plane of the cubic ZrO2 in X-ray diffraction, the ratio of the intensity of I1 to the total intensity of I1, I2t and I2c is from 0.6 to 1.0 (inclusive). The average particle diameter of the Al compound is from 80 nm to 300 nm (inclusive).

Description

technical field [0001] The present invention relates to a cubic boron nitride sintered body and a coated cubic boron nitride sintered body. Specifically, it relates to a cubic boron nitride sintered body and a coated cubic boron nitride sintered body suitable for cutting tools and wear-resistant tools. Background technique [0002] Cubic boron nitride has hardness second only to diamond and excellent thermal conductivity. Also, cubic boron nitride has a feature of low affinity with iron. A cubic boron nitride sintered body comprising a binder phase of cubic boron nitride and metal and / or ceramics is applied to cutting tools, wear-resistant tools, and the like. [0003] For example, as a conventional technology of cubic boron nitride sintered body, there is cubic boron nitride and at least α-Al in the binder phase. 2 o 3 and a cubic boron nitride sintered body of a Zr compound (see Patent Document 1.). [0004] prior art literature [0005] patent documents [0006] Pa...

Claims

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Application Information

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IPC IPC(8): C04B35/583B23B27/14B23B27/20C04B41/87C04B41/89C23C14/18
CPCB23B27/14B23B27/20C04B41/87C23C14/18C04B41/009C04B41/5063C04B41/5068C04B35/119C04B35/6262C04B35/62685C04B35/645C04B2235/3225C04B2235/3246C04B2235/3813C04B2235/3826C04B2235/3839C04B2235/386C04B2235/3865C04B2235/3886C04B2235/402C04B2235/5436C04B2235/6581C04B2235/785C04B2235/786C04B2235/80C04B35/5831C04B35/6303C04B2235/3217C04B41/4529C04B41/5061C04B41/5066C04B41/5062C04B41/89B23B27/18C04B2235/3244
Inventor 平野雄亮城健太郎
Owner TUNGALOY CORP