Cubic boron nitride compact

A technology of tungsten carbide and titanium diboride, which is used in the manufacture of tools, accessories for tool holders, turning equipment, etc., can solve problems such as increased production costs, tool failure, and aggravation.

Active Publication Date: 2007-12-05
ELEMENT SIX ABRASIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem is that tools tend to fail catastrophically due to cracking or chipping, which is exacerbated by the increasing demand in the market for higher throughput through increased cutting speed
This often results in reduced tool life, necessitating frequent replacement of the tool
In turn, this usually leads to increased production costs, which is a disadvantage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Substoichiometric titanium carbonitride powder (Ti(C 0.7 N 0.3 ) 0.8 ) mixed with Al powder with an average particle size of 5 microns. Ti(C 0.7 N 0.3 ) 0.8 The mass ratio between Al and Al is 90:10. The powders were mixed and pressed into a titanium cup to form a briquette, and heated to 1025° C. for 30 minutes under vacuum and then crushed and ground into a powder. The powder mixture was then sand milled for 4 hours. A CBN powder mixture containing approximately 30 wt% CBN with an average particle size of 0.7 microns and other CBNs with an average particle size of 2 microns was added to the slurry in an amount to obtain an overall 65% by volume of CBN. The CBN-containing slurry was ground and mixed using a sand mill for 1 hour. The slurry was dried under vacuum and formed into a compact body, and sintered at 55 kbar (5.5 GPa) and about 1300° C. to produce a CBN compact.

[0039] According to X-ray diffraction analysis, in addition to CBN and titanium carbonit...

Embodiment 2

[0042] Substoichiometric titanium carbonitride powder (Ti(C 0.7 N 0.3 ) 0.8 ) mixed with Al powder with an average particle size of 5 microns. Ti(C 0.7 N 0.3 ) 0.8 The mass ratio between Al and Al is 90:10. The powders were mixed and pressed into a titanium cup to form a briquette, and heated to 1025° C. for 30 minutes under vacuum and then crushed and ground into a powder. The powder mixture was then sand milled for 4 hours. A CBN powder mixture containing approximately 30 wt% CBN with an average particle size of 0.7 microns and other CBNs with an average particle size of 2 microns was added to the slurry in an amount to obtain an overall 45% volume of CBN. The CBN-containing slurry was ground and mixed using a sand mill for 1 hour. The slurry was dried under vacuum and formed into a compact body, and sintered at 55 kbar (5.5 GPa) and about 1300° C. to produce a CBN compact.

[0043] According to X-ray diffraction analysis, in addition to CBN and titanium carbonitrid...

Embodiment 3

[0046] Substoichiometric titanium carbonitride powder (Ti(C 0.5 N 0.5 ) 0.8 ) mixed with Al powder with an average particle size of 5 microns. Ti(C 0.5 N 0.5 ) 0.8 The mass ratio between Al and Al is 90:10. The powders were mixed and pressed into a titanium cup to form a briquette, and heated to 1025° C. for 30 minutes under vacuum and then crushed and ground into a powder. The powder mixture was then sand milled for 4 hours. A CBN powder mixture containing approximately 30 wt% CBN with an average particle size of 0.7 microns and other CBN with an average particle size of 1.4 microns was added to the slurry in an amount to obtain an overall 55% by volume of CBN. The CBN-containing slurry was ground and mixed using a sand mill for 1 hour. The slurry was dried under vacuum and formed into a compact body, and sintered at 55 kbar (5.5 GPa) and about 1300° C. to produce a CBN compact.

[0047] According to X-ray diffraction analysis, in addition to CBN and titanium carboni...

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PUM

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Abstract

The present invention relates to CBN briquetting which contains CBN and matrix phase, the matrix phase combines with a second horniness phase and maximum titanium diboride, thereinto, the second horniness phase is selected from TiCN, TiC, TiN or its mixture and solid solution, the XRD peak height of thetitanium diboride peak (101)(after back ground emendation) is below 12 percent of the CBN peak (111) height.

Description

Background of the invention [0001] The present invention relates to cubic boron carbide (CBN) abrasive compacts. [0002] Boron nitride generally exists in three crystal forms, namely cubic boron nitride (CBN), hexagonal boron nitride (hBN) and wurtzitic cubic boron nitride (wBN). Cubic boron nitride is a hard sphalerite form of boron nitride that is structurally similar to diamond. In the CBN structure, the bonds formed between atoms are strong, mainly covalent tetrahedral bonds. [0003] CBN compacts comprise a sintered mass of CBN particles. When the CBN content is greater than 80% by volume of the compact, there is substantial CBN-CBN contact and bonding. When the CBN content is low, eg in the range of 40-60% by volume of the compact, then direct CBN-CBN contact is limited. [0004] CBN compacts typically also contain a binder phase, such as aluminum, silicon, cobalt, nickel, and titanium. [0005] When the CBN content of the compact is less than 70% by volume, the ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/5831B23B27/14
Inventor N・卡恩S・A・安德森
Owner ELEMENT SIX ABRASIVES
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