Method of making a polycrystalline cubic boron nitride cutting t

Details Method of making a polycrystalline cubic boron nitride cutting t Method of making a polycrystalline cubic boron nitride cutting t

1997-01-22

1998-11-03

Group, Karl

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501 961, 501 964, 264 65, 264 66, C04B 355831, C04B 355835

Patent

active

058308130

ABSTRACT:
A polycrystalline cubic boron nitride cutting tool is from 50 to 85% by weight cubic boron nitride crystals bonded together as a polycrystalline mass. A supporting phase commingled with the polycrystalline cubic boron nitride is made from 15 to 40% by weight of a refractory material which is preferably titanium carbonitride or titanium aluminum carbonitride. The starting composition also comprises from 4 to 10% by weight of Co.sub.2 Al.sub.9. Mixed powders of these ingredients are treated in ammonia at a temperature in the range of from 1000.degree. to 1250.degree. C., which significantly increases the nitrogen content and reduces carbon content of titanium carbonitride. Instead of mixed powders of the starting materials, coated particles may be used such as cubic boron nitride coated with titanium carbonitride, or titanium carbonitride coated with cobalt, aluminum or cobalt aluminide. Hexagonal boron nitride may be substituted as a starting material for a portion of the cubic boron nitride.

REFERENCES:
patent: 4311590 (1982-01-01), Bovenkerk et al.
patent: 4403015 (1983-09-01), Nakai et al.
patent: 4596693 (1986-06-01), Ishizuka et al.
patent: 4619698 (1986-10-01), Ueda et al.
patent: 4647546 (1987-03-01), Hall, Jr. et al.
patent: 4788166 (1988-11-01), Araki et al.
patent: 4807402 (1989-02-01), Rai
patent: 4915903 (1990-04-01), Brupbacher et al.
patent: 5037704 (1991-08-01), Nakai et al.
patent: 5092920 (1992-03-01), Nakai et al.
patent: 5200372 (1993-04-01), Kuroyama et al.
patent: 5271749 (1993-12-01), Rai et al.
patent: 5320988 (1994-06-01), Corrigan
patent: 5326380 (1994-07-01), Yao et al.
patent: 5328875 (1994-07-01), Ueda et al.
patent: 5441817 (1995-08-01), Rai
patent: 5569862 (1996-10-01), Kuroyama et al.

Affiliated with

Also associated with

Rating

Method of making a polycrystalline cubic boron nitride cutting t does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of making a polycrystalline cubic boron nitride cutting t, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making a polycrystalline cubic boron nitride cutting t will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-688827