Patent US4980123A successfully refreshed from Google Patents.
US4980123A
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Process for obtaining a metallurgical bond between a metal material, or a composite material having a metal matrix, and a metal cast piece or a metal-alloy cast piece
Assignee: Temav SpA
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Filing: 1989-09-18
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Granted: 1990-12-25
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Expires: 2009-09-18
Abstract
Abstract Disclosed is a process for obtaining a metallurgical bond between a metal material, or a composite material having a metal matrix, and a metal casting, or a metal alloy casting, which comprises carrying out a surface treatment on said material by means of the deposition of a thin layer of a metal, generally different from the metals contained in the material and in the casting, which is capable of increasing the wettability between the metal of the casting and the material, as well as the heat transfer coefficient between said two partners; and a step of casting around the same material, positioned inside a mold, of the metal, or of the metal alloy the same casting is constituted by.
Inventors
- 👤 Steve A. Gedeon
- 👤 Renato Guerriero
- 👤 Ilario Tangerini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:28
CPC Classifications
B; B22; B22D; B22D19/00; B22D19/14; B22D19/0081
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
106 words
Process for obtaining a metallurgical bond between a metal material or a composite material having a metal matrix, and a metal casting or a metal-alloy casting, which comprises carrying out a surface treatment on said material by means of the deposition of a thin layer of a metal, generally different from the metals contained in the material and in the casting, which is capable of increasing the wettability and heat transfer coefficient between the metal of the casting and the material, and a step of casting around the same metal composite material, positioned inside a mold, using the metal or the metal alloy of the casting.
Claim 2
Dependent Claim
106 words
Process for obtaining a metallurgical bond between a metal material or a composite material having a metal matrix, and a metal casting or a metal-alloy casting, which comprises carrying out a surface treatment on said material by means of the deposition of a thin layer of a metal, generally different from the metals contained in the material and in the casting, which is capable of increasing the wettability and heat transfer coefficient between the metal of the casting and the material, and a step of casting around the same metal composite material, positioned inside a mold, using the metal or the metal alloy of the casting.
Claim 3
Dependent Claim
21 words
Process according to claim 1, wherein the material to be bonded to a casting is a metal or a metal alloy.
Claim 4
Dependent Claim
18 words
Process according to claim 1, wherein the material is an insert used in order to reinforce a casting.
Claim 5
Dependent Claim
19 words
Process according to claim 1, wherein the material is a cast piece to be coupled with another cast piece.
Claim 6
Dependent Claim
35 words
Process according to claim 1, wherein the metals of the material and of the casting are selected from the group consisting of Al, Zn, Pb, Mg, Cu, Sn, In, Ag, Au, Ti and their alloys.
Claim 7
Dependent Claim
41 words
Process according to claim 1, wherein the composite material with metal matrix is provided with a reinforcement constituted by long or short ceramic fibres selected from the group consisting of Al 2 O 3 , SiC, BN, SiO 2 or glass.
Claim 8
Dependent Claim
42 words
Process according to claim 1, wherein the composite material with metal matrix is provided with a reinforcement constituted by ceramic "whiskers" selected from the group consisting of SiC, Si 3 N 4 , B 4 C and Al 2 O 3 .
Claim 9
Dependent Claim
48 words
Process according to claim 1, wherein the composite material with metal matrix is provided with a reinforcement constituted by non-metal powders selected from the group consisting of SiC, BN, Si 3 N 4 , B 4 C, SiO 2 , Al 2 O 3 , glass or graphite.
Claim 10
Dependent Claim
34 words
Process according to claim 1, wherein the composite material with metal matrix is provided with a reinforcement constituted by metal fibres selected from among Be, W, SiC-coated W, B 4 C-coated W or steel.
Claim 11
Dependent Claim
47 words
Process according to claim 1, wherein the metal which constitutes the thin layer to be deposited on the surface of the material is selected from the group consisting of Au, Ag, Cu, Ni, Pt, Pd, Cr, W, Ir, Mo, Ta, Nb, Os, Re, Rh, Ru and Zr.
Claim 12
Dependent Claim
18 words
Process according to claim 1, wherein the deposition of a thin layer of metal takes place by sputtering.
Claim 13
Dependent Claim
19 words
Process according to claim 1, wherein the deposition of a thin layer of metal takes place by electrochemical deposition.
Claim 14
Dependent Claim
32 words
Process according to claim 1, wherein the deposition of a thin layer of metal takes place by "plasma-spraying" or laser-assisted deposition or thermal-evaporation deposition or magnetron-assisted deposition or CVD (Chemical Vapour Deposition).
Claim 15
Dependent Claim
19 words
Process according to claim 1, wherein the casting is produced by gravity casting or pressure casting, or "squeeze casting".
Claim 16
Dependent Claim
28 words
Process according to claim 1, wherein the metal material is produced by gravity casting or pressure casting or "squeeze casting" either directly or with a subsequent processing step.
Claim 17
Dependent Claim
55 words
Process according to claim 1, wherein the metal-matrix composite material is obtained by dispersing a reinforcing material throughout the matrix in the molten state, or by dispersing the reinforcing material throughout the matrix in a partially solid state, or by means of powder metallurgy, or by means of fibre metallization or layer compacting or infiltration.
Claim 18
Dependent Claim
29 words
Process according to claim 1, wherein the thin layer of metal to be deposited on the material has a thickness within the range of about 10 to 200 nm.
Claim 19
Dependent Claim
62 words
Process according to claim 1, wherein the metal-matrix composite material is obtained by dispersing a reinforcing material throughout the matrix in the molten state, or by dispersing the reinforcing material throughout the matrix in a partially solid state, or by means of powder metallurgy, or by means of fibre metallization or layer compacting or infiltration and is then submitted to mechanical machining.
References Cited (Backward Citations)
US4710235A
Cited
US4855101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-24 | 1994-06-25 | 1994-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-24 | 1998-06-25 | 1998-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-24 | 2002-06-25 | 2002-12-25 | $7700.00 | Window Closed / Lapsed |