US4421570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Making molds for continuous casting
Assignee: KM Kabelmetal AG
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Filing: 1982-03-12
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Granted: 1983-12-20
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Expires: 2002-03-12
Abstract
Abstract An age-hardening copper alloy is used, alloy components being zirconium, nickel, chromium, cobalt, phosphorus, and beryllium, to make a tubular blank and solution heat-treating same; after a cold-working step, the pre-sized blank is age-hardened at from 400° C. to 600° C. for at least 15 minutes and explosion-formed in order to obtain the desired size, shape, and dimensions.
Inventors
- 👤 Horst Gravemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:20
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/04; B22D11/057; C; C22; C22F; C22F1/00; C22F1/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
74 words
A method of making tubular, curved or straight molds for continuous casting, comprising the steps of providing an age-hardening copper alloy; making a tube from the alloy; solution heat-treating the tube material; subsequently age-hardening the tube at from 400° C. to 600° C. for at least 15 minutes for obtaining internal precipitation; and cold-working the tube by explosion-forming in order to obtain its final size as to its interior serving as a mold cavity.
Claim 2
Independent Claim
74 words
A method of making tubular, curved or straight molds for continuous casting, comprising the steps of providing an age-hardening copper alloy; making a tube from the alloy; solution heat-treating the tube material; subsequently age-hardening the tube at from 400° C. to 600° C. for at least 15 minutes for obtaining internal precipitation; and cold-working the tube by explosion-forming in order to obtain its final size as to its interior serving as a mold cavity.
Claim 3
Dependent Claim
21 words
The method as in claim 1, including the step of cold-working the tube after the heat treatment prior to the age-hardening.
Claim 4
Dependent Claim
13 words
The method as in claim 2, the cold-working step being another explosion-forming step.
Claim 5
Dependent Claim
23 words
The method as in claim 2, the cold-working step including placing a mandrel into the tube and drawing the tube through a die.
Claim 6
Dependent Claim
27 words
The method as in claim 1, using a copper alloy of 0.3% to 1.2% chromium and 0.05% to 0.2% zirconium, the remainder being copper and spurious impurities.
Claim 7
Dependent Claim
17 words
The method as in claim 1, using a copper alloy of copper with 0.05% to 0.3% zirconium.
Claim 8
Dependent Claim
20 words
The method as in claim 1, using a copper alloy with 0.6% to 1.5% Ni and 0.1% to 0.3% P.
Claim 9
Dependent Claim
33 words
The method as in claim 1, using a copper alloy with 1% to 5% Co or 1% to 2.5% Ni or 0.5% to 1.5% Ni and 1.5% Co; and 0.3% to 0.6% Be.
Claim 10
Dependent Claim
20 words
The method as in claim 1, using a copper alloy with 0.2% to 1.1% Si and 1.2% to 3.5% Ni.
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) | 1986-12-19 | 1987-06-20 | 1987-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-19 | 1991-06-20 | 1991-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-19 | 1995-06-20 | 1995-12-20 | $7700.00 | Window Closed / Lapsed |