Patent US3882581A successfully refreshed from Google Patents.
US3882581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated, partially laminated carbide cutting tool insert
Assignee: 3M Co
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Filing: 1974-03-13
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Granted: 1975-05-13
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Expires: 1994-03-13
Abstract
Abstract A coated, laminated, crater-resisting composite cemented carbide cutting tool insert having a cemented metal carbide body which has an edge wall shaped to define a flank and cutting edge. The body has a recess filled with a lamina to define the rake face. The edge wall comprises flank wear resistant material and the rake face comprises a crater-resistant material of cemented carbide containing tungsten carbide and at least one carbide of a metal contained in Groups IVb or Vb of the periodic table. The flank and rake faces are coated about the cutting edges of the cutting insert with a hard surface coating, e.g. titanium carbide, said hard surface coating being about 0.0025-to-0.025 millimeters thick.
Inventors
- 👤 Charles E Mereness
- 👤 Gerald R Abrahamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:56
CPC Classifications
B; B23; B23B; B23B27/00; B23B27/14; B23B27/148; B22; B22F; B22F7/00; B22F7/06; C; C23; C23C; C23C30/00; C23C30/005; Y; Y10; Y10T; Y10T407/00; Y10T407/27
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
120 words
A LAMINATED, CRATER-RESISTANT COMPOSITE METAL CUTTING TOOL INSERT FORMED OF SINTERED METAL CARBIDE COMPRISING: A BODY HAVING A CORE AND AN EDGE WALL SHAPED TO DEFINE BOTH A FLANK FACE AND A CUTTING EDGE, SAID BODY HAVING A RECESS FILLED WITH A LAMINA TO DEFINE THE RAKE FACE; WHEREIN SAID EDGE WALL COMPRISES A FLANK WEAR RESISTANT CARBIDE MATERIAL AND SAID LAMINA COMPRISES A CRATER-RESISTANT MATERIAL CONTAINING A MAJORITY OF TUNGSTEN CARBIDE, AN IRON GROUP BINDER AND AT LEAST ONE CARBIDE OF A METAL FROM GROUPS IVB AND VB OF THE PERIODIC TABLE, AND AT LEAST THE RAKE FACE AND FLANKS OF SAID INSERT ARE COATED WITH A HARDSURFACE COATING HAVING A THICKNESS OF NO MORE THAN ABOUT 0.001 INCH.
Claim 2
Dependent Claim
120 words
A LAMINATED, CRATER-RESISTANT COMPOSITE METAL CUTTING TOOL INSERT FORMED OF SINTERED METAL CARBIDE COMPRISING: A BODY HAVING A CORE AND AN EDGE WALL SHAPED TO DEFINE BOTH A FLANK FACE AND A CUTTING EDGE, SAID BODY HAVING A RECESS FILLED WITH A LAMINA TO DEFINE THE RAKE FACE; WHEREIN SAID EDGE WALL COMPRISES A FLANK WEAR RESISTANT CARBIDE MATERIAL AND SAID LAMINA COMPRISES A CRATER-RESISTANT MATERIAL CONTAINING A MAJORITY OF TUNGSTEN CARBIDE, AN IRON GROUP BINDER AND AT LEAST ONE CARBIDE OF A METAL FROM GROUPS IVB AND VB OF THE PERIODIC TABLE, AND AT LEAST THE RAKE FACE AND FLANKS OF SAID INSERT ARE COATED WITH A HARDSURFACE COATING HAVING A THICKNESS OF NO MORE THAN ABOUT 0.001 INCH.
Claim 3
Dependent Claim
43 words
The cutting tool insert of claim 1 wherein said core and said edge wall forming said cutting edge compose the same material composition, and said edge wall has a projecting portion forming said recess adjacent said cutting edge and opposite said flank face.
Claim 4
Dependent Claim
23 words
The cutting tool insert of claim 1 wherein said core and said edge wall shaped to define said cutting edge comprise different compositions.
Claim 5
Dependent Claim
32 words
The cutting tool insert of claim 1 wherein said hard-surface coating is a metal carbide formed from at least one of the metals of groups IVb and Vb of the periodic table.
Claim 6
Dependent Claim
13 words
The cutting tool insert of Claim 4 wherein said coating is titanium carbide.
Claim 7
Dependent Claim
32 words
The cutting tool insert of claim 1 wherein said hard-surface coating is a metal nitride formed from at least one of the metals of groups IVb and Vb of the periodic table.
Claim 8
Dependent Claim
33 words
The cutting tool insert of claim 2 wherein said hard surface coating is a metal carbide formed from at least one of the metals of groups IVb and Vb of the periodic table.
Claim 9
Dependent Claim
33 words
The cutting tool insert of claim 3 wherein said hard surface coating is a metal carbide formed from at least one of the metals of groups IVb and Vb of the periodic table.
Claim 10
Dependent Claim
13 words
The cutting tool insert of claim 7 wherein said coating is titanium carbide.
Claim 11
Dependent Claim
13 words
The cutting tool insert of claim 8 wherein said coating is titanium carbide.
Claim 12
Dependent Claim
33 words
The cutting tool insert of claim 2 wherein said hard surface coating is a metal nitride formed from at least one of the metals of groups IVb and Vb of the periodic table.
Claim 13
Dependent Claim
33 words
The cutting tool insert of claim 3 wherein said hard surface coating is a metal nitride formed from at least one of the metals of groups IVb and Vb of the periodic table.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |