US4681734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat spraying material and manufacturing process thereof
Assignee: ECG Immobilier SA
•
Filing: 1985-01-24
•
Granted: 1987-07-21
•
Expires: 2005-01-24
Abstract
Abstract A powdery material is prepared by atomization from a molten alloy having the following composition in weight percent: chromium: 10-30; aluminium: 1-25; carbon: less than 0.5; nickel: less than 10; iron: the balance, with a cooling speed at least equal to 400° C./sec., for heat spraying having a grain size comprised between -150 and +27 microns of which the specific area is higher than 500 cm 2 /g. Said material enables to form on a metal substrate a self-adhesive layer having a resistance to pulling by traction which is higher than 20 N/mm 2 .
Inventors
- 👤 Wolfgang Simm
- 👤 Hans-Theo Steine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:57
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/04; C23C4/06; C23C4/08; B; B22; B22F; B22F9/00; B22F9/02; B22F9/06; B22F9/08; B22F9/082; C22; C22C; C22C33/00; C22C33/02; C22C33/0207; C22C33/0257; C22C33/0278; C22C33/0285; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
91 words
A method of manufacture of a powdery material for thermal spraying, characterized in that a molten alloy of composition by weight: chromium: 10 to 30%; aluminium: 1 to 25%; carbon: less than 0.5%; nickel: less than 10%; iron: the remainder; is subjected to atomization from the liquid state with a cooling speed of at least 400° C./sec. and ranging up to 5000° C./sec., so as to produce a powder having a grain size of from -150 to +27 microns, the specific surface of which is higher than 500 cm 2 /g.
Claim 2
Independent Claim
91 words
A method of manufacture of a powdery material for thermal spraying, characterized in that a molten alloy of composition by weight: chromium: 10 to 30%; aluminium: 1 to 25%; carbon: less than 0.5%; nickel: less than 10%; iron: the remainder; is subjected to atomization from the liquid state with a cooling speed of at least 400° C./sec. and ranging up to 5000° C./sec., so as to produce a powder having a grain size of from -150 to +27 microns, the specific surface of which is higher than 500 cm 2 /g.
Claim 3
Dependent Claim
18 words
A method as in claim 1, characterized in that the cooling speed lies between 600° and 5000° C./sec.
Claim 4
Dependent Claim
25 words
A method as in claim 1 or claim 2, characterized in that the specific surface of the powder is higher than 750 cm 2 /g.
Claim 5
Independent Claim
35 words
A method as in one of the claims 1 to 3, characterized in that the alloy contains up to 2% by weight of one or more elements chosen from the following: Zr, Ce and Y.
Claim 6
Independent Claim
34 words
A method as in one of the claims 1 to 4, characterized in that the alloy contains from 0.5 to 5% by weight of molybdenum and/or from 0.5 to 5% by weight of titanium.
Claim 7
Dependent Claim
21 words
A material for thermal spraying, containing a powder manufactured by the method as in one of the claims 1 to 5.
Claim 8
Dependent Claim
40 words
A material as in claim 6, characterized in that it contains in the form of a mixture, at least 20% by weight of the said powder and up to 80% by weight of at least one hard material as powder.
Claim 9
Dependent Claim
21 words
A material as in claim 7, characterized in that the said hard material is chosen from the metallic oxides and carbides.
Claim 10
Dependent Claim
56 words
A material as in one of the claims 6 to 8, characterized in that it contains in the form of a mixture, at least 20% by weight of the said powder and up to 80% by weight of a metallic powder chosen from the group consisting of the following elements: W, Mo, Ta, Ti and Cr.
Claim 11
Dependent Claim
32 words
A material as in one of the claims 6 to 8, characterized in that it contains up to 80% by weight of an alloy having a base of iron, nickel or cobalt.
Claim 12
Dependent Claim
26 words
Employment of the material as in one of the claims 6 to 9 for the deposition by thermal spraying of a self-adhesive layer on a substrate.
Claim 13
Independent Claim
97 words
A method of producing a thermal sprayed self-adhesive layer of an alloy on a metal substrate which comprises thermal spraying a powdered alloy composition containing by weight 10 to 30% chromium, 1 to 25% aluminum, less than 0.5% carbon, less than 10% nickel and the remainder iron, said alloy powder having been formed by atomization from the liquid state with a cooling speed of at least 400° C./sec. and ranging up to 5000° C./sec., said powdered alloy having a grain size of from -150 to +27 microns and a specific surface higher than 500 Cm 2 /gram.
Claim 14
Independent Claim
97 words
A method of producing a thermal sprayed self-adhesive layer of an alloy on a metal substrate which comprises thermal spraying a powdered alloy composition containing by weight 10 to 30% chromium, 1 to 25% aluminum, less than 0.5% carbon, less than 10% nickel and the remainder iron, said alloy powder having been formed by atomization from the liquid state with a cooling speed of at least 400° C./sec. and ranging up to 5000° C./sec., said powdered alloy having a grain size of from -150 to +27 microns and a specific surface higher than 500 Cm 2 /gram.
References Cited (Backward Citations)
US4297135A
Cited
US4430115A
Cited
US4355057A
Cited
US4377375A
Cited
US4385929A
Cited
US4420336A
Cited
US4437883A
Cited
US4540546A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-20 | 1991-01-19 | 1991-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-20 | 1995-01-19 | 1995-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-20 | 1999-01-19 | 1999-07-21 | $7700.00 | Window Closed / Lapsed |