US5427987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Group IVB boride based cutting tools for machining group IVB based materials
Assignee: Kennametal Inc
•
Filing: 1993-05-10
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Granted: 1995-06-27
•
Expires: 2013-05-10
Abstract
Abstract A densified titanium diboride based ceramic composition is provided having W and Co therein and a fine grain size. The composition has particular usefulness as a cutting tool for the machining of titanium based alloys at high speeds.
Inventors
- 👤 Pankai K. Mehrotra
- 👤 Deepak P. Ahuja
- 👤 Holly S. Brooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:23
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/5805; C04B35/58064; C04B35/58071; B; B24; B24D; B24D3/00; B24D3/02; B24D3/04; B24D3/06; B24D3/34; B24D3/342; C04B35/58078; C04B35/622; C04B35/64; C04B35/645; Y; Y10; Y10S; Y10S264/00; Y10S264/36
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
79 words
A metalcutting tool for the chip forming machining of a group IVB metallic material comprising: a rake face over which said chips will flow during said machining of said group IVB metallic material; a flank face and a cutting edge, for cutting into said group IVB metallic material at high speeds, formed at a juncture of said rake and said flank face; wherein said metal cutting tool has a ceramic composition consisting essentially of a Group IVB boride phase.
Claim 2
Dependent Claim
79 words
A metalcutting tool for the chip forming machining of a group IVB metallic material comprising: a rake face over which said chips will flow during said machining of said group IVB metallic material; a flank face and a cutting edge, for cutting into said group IVB metallic material at high speeds, formed at a juncture of said rake and said flank face; wherein said metal cutting tool has a ceramic composition consisting essentially of a Group IVB boride phase.
Claim 3
Dependent Claim
20 words
The metalcutting tool according to claim 1 wherein the composition has an average grain size of 8 μm or less.
Claim 4
Dependent Claim
18 words
The metalcutting tool according to claim 1 wherein the Group IVB boride phase is a titanium boride phase.
Claim 5
Dependent Claim
18 words
The metalcutting tool according to claim 2 wherein the Group IVB boride phase is a titanium boride phase.
Claim 6
Dependent Claim
91 words
A cutting tool comprising: a rake face; a flank face; and a cutting edge formed at a juncture of said rake face and said flank face; wherein said cutting tool is characterized by: a microstructure consisting essentially of phases having a TiB 2 crystal structure; and wherein said phases include phases containing tungsten at differing concentration levels; a density of at least 97% of theoretical density; a hardness of 94.3 to 96.5 Rockwell A at room temperature; and wherein said microstructure has an average grain size of 8 μm or less.
Claim 7
Dependent Claim
91 words
A cutting tool comprising: a rake face; a flank face; and a cutting edge formed at a juncture of said rake face and said flank face; wherein said cutting tool is characterized by: a microstructure consisting essentially of phases having a TiB 2 crystal structure; and wherein said phases include phases containing tungsten at differing concentration levels; a density of at least 97% of theoretical density; a hardness of 94.3 to 96.5 Rockwell A at room temperature; and wherein said microstructure has an average grain size of 8 μm or less.
Claim 8
Dependent Claim
21 words
The metalcutting tool according to claim 1 wherein said ceramic composition is made from at least 75 weight percent titanium diboride.
Claim 9
Dependent Claim
21 words
The metalcutting tool according to claim 2 wherein said ceramic composition is made from at least 75 weight percent titanium diboride.
Claim 10
Dependent Claim
21 words
The metalcutting tool according to claim 1 wherein said ceramic composition is made from at least 85 weight percent titanium diboride.
Claim 11
Dependent Claim
21 words
The metalcutting tool according to claim 2 wherein said ceramic composition is made from at least 85 weight percent titanium diboride.
Claim 12
Dependent Claim
21 words
The metalcutting tool according to claim 1 wherein said ceramic composition is made from at least 90 weight percent titanium diboride.
Claim 13
Dependent Claim
21 words
The metalcutting tool according to claim 2 wherein said ceramic composition is made from at least 90 weight percent titanium diboride.
Claim 14
Dependent Claim
20 words
The metalcutting tool according to claim 1 wherein said composition has an average grain size of 6 μm or less.
Claim 15
Dependent Claim
20 words
The metalcutting tool according to claim 1 wherein said composition has an average grain size of 4 μm or less.
Claim 16
Dependent Claim
20 words
The metalcutting tool according to claim 6 wherein said composition has an average grain size of 6 μm or less.
Claim 17
Dependent Claim
20 words
The metalcutting tool according to claim 8 wherein said composition has an average grain size of 6 μm or less.
Claim 18
Dependent Claim
20 words
The metalcutting tool according to claim 10 wherein said composition has an average grain size of 6 μm or less.
Claim 19
Dependent Claim
23 words
The metalcutting tool according to claim 6 wherein said composition has a density of at least 98 percent of the theoretical calculated density.
Claim 20
Dependent Claim
23 words
The metalcutting tool according to claim 8 wherein said composition has a density of at least 98 percent of the theoretical calculated density.
Claim 21
Dependent Claim
23 words
The metalcutting tool according to claim 10 wherein said composition has a density of at least 98 percent of the theoretical calculated density.
Claim 22
Dependent Claim
23 words
The metalcutting tool according to claim 12 wherein said composition has a density of at least 98 percent of the theoretical calculated density.
Claim 23
Dependent Claim
23 words
The metalcutting tool according to claim 14 wherein said composition has a density of at least 98 percent of the theoretical calculated density.
Claim 24
Dependent Claim
23 words
The metalcutting tool according to claim 15 wherein said composition has a density of at least 98 percent of the theoretical calculated density.
Claim 25
Dependent Claim
23 words
The metalcutting tool according to claim 16 wherein said composition has a density of at least 98 percent of the theoretical calculated density.
Claim 26
Dependent Claim
15 words
The cutting tool according to claim 5 wherein said density is at least 98 percent.
Claim 27
Dependent Claim
20 words
The cutting tool according to claim 24 wherein said microstructure is made from at least 75 weight percent titanium diboride.
Claim 28
Dependent Claim
20 words
The cutting tool according to claim 24 wherein said microstructure is made from at least 85 weight percent titanium diboride.
Claim 29
Dependent Claim
20 words
The cutting tool according to claim 24 wherein said microstructure is made from at least 90 weight percent titanium diboride.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-06-26 | 1998-12-26 | 1999-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-06-26 | 2002-12-26 | 2003-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-06-26 | 2006-12-26 | 2007-06-27 | $7700.00 | Window Closed / Lapsed |