US3988955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated steel product and process of producing the same
Assignee: Individual
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Filing: 1974-09-11
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Granted: 1976-11-02
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Expires: 1994-09-11
Abstract
Abstract A coated steel product, namely, a cutting instrument such as a band saw blade, in which the body of the blade is of steel, the tooth tip is of impulse hardened steel and the tip is covered with a coating of titanium carbide or refractory metal carbide, the coating metal or compound having been deposited by ion plating onto the surface of the tip. The process through which the cutting tool is produced includes preshaping and sharpening the tool, then ion cleaning the tips, bombarding the tips with ions of the titanium or refractory metal followed by reacting the titanium or refractory metal with a carbon containing chemical or their carbides and then simultaneously subjecting both the coating and the steel tip to a magnetic flux for impulse hardening primarily the steel tip. Other coatings of metal carbides, nitrides, borides and metal compounds are described.
Inventors
- 👤 Niels N. Engel
- 👤 Eugene A. Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:43
CPC Classifications
B; B23; B23D; B23D65/00; B23D61/00; C; C21; C21D; C21D9/00; C21D9/24; C23; C23C; C23C14/00; C23C14/22; C23C14/24; C23C14/32; C23C14/48; Y; Y10; Y10S; Y10S148/00; Y10S148/90; Y10S76/00; Y10S76/02; Y10S76/11; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12576; Y10T83/00; Y10T83/929; Y10T83/9317; Y10T83/9319
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
69 words
A process of producing a cutting tool providing a hardenable steel tool with a cutting edge comprising, ion implanting a coating of a second metal into said cutting edge, reacting said second metal with a chemical to make a compound which is harder than the second metal and subjecting both the cutting edge and its coating to a magnetic flux generated by electrical induction for impulse hardening the same.
Claim 2
Dependent Claim
69 words
A process of producing a cutting tool providing a hardenable steel tool with a cutting edge comprising, ion implanting a coating of a second metal into said cutting edge, reacting said second metal with a chemical to make a compound which is harder than the second metal and subjecting both the cutting edge and its coating to a magnetic flux generated by electrical induction for impulse hardening the same.
Claim 3
Dependent Claim
24 words
The process defined in claim 1 wherein said second metal is selected from the group consisting of refractory metals and said chemical is carbon.
Claim 4
Dependent Claim
13 words
The process defined in claim 2 wherein said steel after hardening is martensitic.
Claim 5
Dependent Claim
44 words
The process defined in claim 3 wherein the surface of the resulting coating after hardening has a hardness in excess of 3,000 H.V. on the Vickers scale and said impulse hardened steel has a hardness in excess of 1000 H.V. on the Vickers scale.
Claim 6
Dependent Claim
23 words
The process defined in claim 3 wherein the steel before receiving the coating has been ion bombarded in a vacuum chamber with argon.
Claim 7
Dependent Claim
73 words
A cutting tool comprising a tool body having a cutting edge, a metal coating implanted into said cutting edge to the extent that a surface plate is obtained, the surface of said metal coating containing a chemical reacted with said coating, said chemical forming a compound with said refractory metal harder than the metal itself, said cutting edge into which the refractory metal is embedded having a martensitic grain structure adjacent said coating.
Claim 8
Dependent Claim
73 words
A cutting tool comprising a tool body having a cutting edge, a metal coating implanted into said cutting edge to the extent that a surface plate is obtained, the surface of said metal coating containing a chemical reacted with said coating, said chemical forming a compound with said refractory metal harder than the metal itself, said cutting edge into which the refractory metal is embedded having a martensitic grain structure adjacent said coating.
Claim 9
Dependent Claim
66 words
The cutting tool defined in claim 6 wherein said refractory metal is selected from the group consisting of scandium, titanium, yttrium, zirconium, hafnium, vanadium, columbium, tantalum, chromium, molybdenum, tungsten, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, actinium, thorium, protactinium, uranium, neptunium, plutonium, americium, curium, berkelium, californium, einsteinium, fermium, mendelevium, nobelium, lawrencium, iron, cobalt, nickel, boron and alloys thereof.
Claim 10
Dependent Claim
14 words
The cutting tool defined in claim 6 wherein said martensitic grain structure is submicroscopic.
Claim 11
Dependent Claim
41 words
The cutting tool defined in claim 8 wherein said submicroscopic martensitic steel has a hardness in excess of about 1,000 H.V. on the Vickers scale and said coating is titanium carbide having a hardness of above 3,000 on the Vickers scale.
Claim 12
Dependent Claim
44 words
The cutting tool defined in claim 6 wherein said tool body is a saw blade, includes a plurality of spaced teeth, and said cutting edge is adjacent the tip of each tooth, said coating extending over the leading and trailing edge of each tooth.
Claim 13
Dependent Claim
25 words
The cutting tool defined in claim 10 wherein the surface of said coating is selected from the group consisting of tungsten carbide and titanium carbide.
Claim 14
Dependent Claim
36 words
The cutting tool defined in claim 10 wherein said coating extends from a position intermediate the gulley and tip of each tooth to said tip along both the cutting edge and trailing edge of each tooth.
Claim 15
Dependent Claim
40 words
The cutting tool defined in claim 11 wherein said submicroscopic steel has a hardness in excess of about 1000 H.V. on the Vickers scale and said surface of said coating has a hardness of above 3,000 on the Vickers scale.
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) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |