US4268582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boride coated cemented carbide
Assignee: Carboloy Inc
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Filing: 1979-03-02
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Granted: 1981-05-19
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Expires: 1999-03-02
Abstract
Abstract A coated cemented carbide article comprises a cemented carbide substrate, the surface regions thereof having diffused therein an element such as boron, silicon or aluminum. The article further comprises a coating disposed on the diffused substrate, the coating being a boride such as titanium boride, hafnium boride, zirconium boride or tantalum boride. In another embodiment the coated cemented article further includes an interlayer sandwiched between the diffused substrate and the boride coating, the interlayer being one or more layers formed from the carbides, nitrides or carbonitrides of elements from groups IVb and Vb of the Periodic Table of Elements, and combinations thereof.
Inventors
- 👤 Thomas E. Hale
- 👤 Roy C. Lueth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:10
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C16/38; B; B23; B23B; B23B27/00; B23B27/14; B23B27/148; C23C30/00; C23C30/005; Y; Y10; Y10S; Y10S428/00; Y10S428/911; Y10S428/922; Y10S428/9265; Y10S428/932; Y10S428/9335; Y10S428/938; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12049; Y10T428/12056; Y10T428/12493; Y10T428/12535; Y10T428/12576
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
64 words
A coated cemented carbide article comprising: a cemented carbide substrate, the surface region of said substrate having diffused therein for predetermined a depth an element selected from the group consisting of boron, silicon, and aluminum; and a coating disposed on said diffused substrate surface said coating being a boride selected from the group consisting of titanium boride, hafnium boride, zirconium boride, and tantalum boride.
Claim 2
Dependent Claim
64 words
A coated cemented carbide article comprising: a cemented carbide substrate, the surface region of said substrate having diffused therein for predetermined a depth an element selected from the group consisting of boron, silicon, and aluminum; and a coating disposed on said diffused substrate surface said coating being a boride selected from the group consisting of titanium boride, hafnium boride, zirconium boride, and tantalum boride.
Claim 3
Dependent Claim
26 words
A coated cemented carbide article as recited in claim 1 in which the element diffused into the surface region of the cemented carbide substrate is boron.
Claim 4
Dependent Claim
26 words
A coated cemented carbide article as recited in claim 1 in which the element diffused into the surface region of the cemented carbide substrate is silicon.
Claim 5
Dependent Claim
26 words
A coated cemented carbide article as recited in claim 1 in which the element diffused into the surface region of the cemented carbide substrate is aluminum.
Claim 6
Dependent Claim
24 words
A coated cemented carbide article as recited in claim 1 wherein said cemented carbide substrate has a cobalt content greater than 10% by weight.
Claim 7
Dependent Claim
18 words
A coated cemented carbide article as recited in claim 5 in which said boride coating is titanium boride.
Claim 8
Dependent Claim
18 words
A coated cemented carbide article as recited in claim 5 in which said boride coating is hafnium boride.
Claim 9
Dependent Claim
18 words
A coated cemented carbide article as recited in claim 5 in which said boride coating is zirconium boride.
Claim 10
Dependent Claim
18 words
A coated cemented carbide article as recited in claim 5 in which said boride coating is tantalum boride.
Claim 11
Dependent Claim
44 words
A coated cemented carbide article having a cobalt content greater than 10% by weight comprising: a cemented carbide substrate, the surface region of said substrate having diffused therein boron for a predetermined depth; and a titanium boride coating disposed on said boron diffused substrate.
Claim 12
Dependent Claim
44 words
A coated cemented carbide article having a cobalt content greater than 10% by weight comprising: a cemented carbide substrate, the surface region of said substrate having diffused therein boron for a predetermined depth; and a titanium boride coating disposed on said boron diffused substrate.
Claim 13
Dependent Claim
95 words
A coated cemented carbide article comprising: a cemented carbide substrate; an interlayer disposed on said substrate, said interlayer including at least one layer selected from the group consisting of the carbides, nitrides and carbonitrides of elements from groups IVb and Vb of the Periodic Table of Elements, and combinations of said carbides, nitrides and carbonitrides of elements from groups IVb and Vb of the Periodic Table of Elements; and a coating disposed on said interlayer said coating being a boride selected from the group consisting of titanium boride, hafnium boride, zirconium boride and tantalum boride.
Claim 14
Dependent Claim
95 words
A coated cemented carbide article comprising: a cemented carbide substrate; an interlayer disposed on said substrate, said interlayer including at least one layer selected from the group consisting of the carbides, nitrides and carbonitrides of elements from groups IVb and Vb of the Periodic Table of Elements, and combinations of said carbides, nitrides and carbonitrides of elements from groups IVb and Vb of the Periodic Table of Elements; and a coating disposed on said interlayer said coating being a boride selected from the group consisting of titanium boride, hafnium boride, zirconium boride and tantalum boride.
Claim 15
Dependent Claim
17 words
A coated cemented carbide article as recited in claim 11 in which the coating is titanium boride.
Claim 16
Dependent Claim
17 words
A coated cemented carbide article as recited in claim 11 in which the coating is hafnium boride.
Claim 17
Dependent Claim
17 words
A coated cemented carbide article as recited in claim 11 in which the coating is zirconium boride.
Claim 18
Dependent Claim
17 words
A coated cemented carbide article as recited in claim 11 in which the coating is tantalum boride.
Claim 19
Dependent Claim
39 words
A coated cemented carbide article as recited in claim 11 in which the surface region of the substrate, upon which is disposed said interlayer, is diffused with an element selected from the group consisting of boron, silicon and aluminum.
Claim 20
Dependent Claim
24 words
A coated cemented carbide article as recited in claim 16 in which the element diffused into said surface region of the substrate is boron.
Claim 21
Dependent Claim
24 words
A coated cemented carbide article as recited in claim 16 in which the element diffused into said surface region of the substrate is silicon.
Claim 22
Dependent Claim
24 words
A coated cemented carbide article as recited in claim 16 in which the element diffused into said surface region of the substrate is aluminum.
Claim 23
Dependent Claim
119 words
A coated cemented carbide article comprising: a cemented carbide substrate, the surface region of said substrate having diffused therein an element selected from group consisting of boron, silicon and aluminum; an interlayer disposed on said diffused surface region of the substrate, said interlayer including at least one layer selected from the group consisting of the carbides, nitrides, carbonitrides of elements from groups IVb and Vb of the Periodic Table of Elements, and combinations of said carbides, nitrides and carbonitrides of elements from groups IVb and Vb of the Periodic Table of Elements; and a coating disposed on said interlayer, said coating being a boride selected from the group consisting of titanium boride, hafnium boride, zirconium boride and tantalum boride.
Claim 24
Dependent Claim
119 words
A coated cemented carbide article comprising: a cemented carbide substrate, the surface region of said substrate having diffused therein an element selected from group consisting of boron, silicon and aluminum; an interlayer disposed on said diffused surface region of the substrate, said interlayer including at least one layer selected from the group consisting of the carbides, nitrides, carbonitrides of elements from groups IVb and Vb of the Periodic Table of Elements, and combinations of said carbides, nitrides and carbonitrides of elements from groups IVb and Vb of the Periodic Table of Elements; and a coating disposed on said interlayer, said coating being a boride selected from the group consisting of titanium boride, hafnium boride, zirconium boride and tantalum boride.
Claim 25
Dependent Claim
92 words
A coated cemented carbide article comprising: a cemented carbide substrate, the surface region of said substrate having boron diffused therein a predetermined depth; an interlayer disposed on said boron diffused substrate, said interlayer including at least one layer selected from the group consisting of the carbides, nitrides and carbonitrides of elements from groups IVb and Vb of the Periodic Table of Elements, and combinations of said carbides, nitrides and carbonitrides of elements from groups IVb and Vb of the Periodic Table of Elements; and a titanium boride coating disposed on said interlayer.
Claim 26
Dependent Claim
92 words
A coated cemented carbide article comprising: a cemented carbide substrate, the surface region of said substrate having boron diffused therein a predetermined depth; an interlayer disposed on said boron diffused substrate, said interlayer including at least one layer selected from the group consisting of the carbides, nitrides and carbonitrides of elements from groups IVb and Vb of the Periodic Table of Elements, and combinations of said carbides, nitrides and carbonitrides of elements from groups IVb and Vb of the Periodic Table of Elements; and a titanium boride coating disposed on said interlayer.
Claim 27
Dependent Claim
45 words
A coated cemented carbide article as recited in claim 21 in which said interlayer comprises a first layer of titanium carbide disposed on said boron diffused surface region of said substrate and a second layer of titanium nitride overlying said first layer of titanium carbide.
Claim 28
Dependent Claim
54 words
A coated cemented carbide article as recited in claim 21 in which said interlayer comprises a first layer of titanium carbide disposed on said boron diffused surface region of said substrate; and a second layer overlying said first layer of titanium carbide said second layer being a mixture of titanium carbide and titanium nitride.
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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) | 1984-05-18 | 1984-11-17 | 1985-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-18 | 1988-11-17 | 1989-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-18 | 1992-11-17 | 1993-05-19 | $7700.00 | Window Closed / Lapsed |