US4426426A
Expired / Lapsed
US
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Welding alloy and method
Assignee: Individual
•
Filing: 1982-07-22
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Granted: 1984-01-17
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Expires: 2002-07-22
Abstract
Abstract Spheroidal graphite cast iron body can be welded using a welding alloy whose carbon diffusion rate is sufficiently high that cementite formation is prevented. The alloy has essentially the following composition: less than 0.2% manganese, less than 2.0% carbon, 2.5 to 3.2% silicon, up to 1.0% copper, up to 0.5% molybdenum, up to 2% aluminum, up to 30% nickel, up to 0.1% tungsten, up to 0.1% chromium, up to 0.1% vanadium, magnesium and/or rare earth elements in an amount up to and sufficient to promote the formation of graphite spherolites upon cooling, and balance substantially iron.
Inventors
- 👤 Horst Muhlberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:49
CPC Classifications
C; C22; C22C; C22C37/00; C22C37/10; B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3053; B23K35/3066; B23K35/3093; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/925; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12951; Y10T428/12958
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
95 words
A welding member in a form for generating a weldment welding to a spheroidal graphite cast iron body, said member consisting by weight of an alloy of the following composition: less than 0.1% manganese, less than 1.0% carbon, 2.8 to 2.9% silicon, 0.6 to 0.8% copper, 0.1 to 0.25% molybdenum, 0.2 to 0.3% aluminum 1 to 3% nickel, up to 1% tungsten, up to 0.1% chromium, up to 0.1% vanadium, magnesium and/or rare earth elements in an amount up to and sufficient to promote the formation of graphite spherulites upon cooling, and balance substantially iron.
Claim 2
Dependent Claim
95 words
A welding member in a form for generating a weldment welding to a spheroidal graphite cast iron body, said member consisting by weight of an alloy of the following composition: less than 0.1% manganese, less than 1.0% carbon, 2.8 to 2.9% silicon, 0.6 to 0.8% copper, 0.1 to 0.25% molybdenum, 0.2 to 0.3% aluminum 1 to 3% nickel, up to 1% tungsten, up to 0.1% chromium, up to 0.1% vanadium, magnesium and/or rare earth elements in an amount up to and sufficient to promote the formation of graphite spherulites upon cooling, and balance substantially iron.
Claim 3
Dependent Claim
16 words
The autogenous welding or electric arc welding rod composed of the alloy defined in claim 1.
Claim 4
Dependent Claim
11 words
A welding wire composed of the alloy defined in claim 1.
Claim 5
Dependent Claim
47 words
A member consisting essentially of the body of spheroidal graphite cast iron as defined in claim 1 and a transition body of said alloy metallically bonded to said body of cast iron and connected therewith by casting the cast iron body against said body of said alloy.
Claim 6
Dependent Claim
39 words
The member defined in claim 4 wherein said alloy body has a wall thickness and dimension such that, upon the casting of said cast body thereagainst, a normal steel can be welded to said member at said alloy body.
Claim 7
Dependent Claim
66 words
A method of making a transition piece for the welding of normal steel to a cast body which comprises the steps of: preforming an alloy body of the alloy defined in claim 1; and casting a spherolitic cast iron body in a mold in contact with said alloy body to form a metallic bond between said alloy body and the resulting spheroidal graphite cast iron body.
Claim 8
Dependent Claim
31 words
A method of welding which comprises the steps of forming a pool of an alloy as defined in claim 1 adjacent a spheroidal graphite cast iron body and cooling said pool.
References Cited (Backward Citations)
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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) | 1987-01-16 | 1987-07-18 | 1988-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-16 | 1991-07-18 | 1992-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-16 | 1995-07-18 | 1996-01-17 | $7700.00 | Window Closed / Lapsed |