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US3830644A Expired / Lapsed US ⏱️ 0.0 years remaining

Copper alloy for plastic-working molds

Assignee: Kanadevia Corp
•
Filing: 1972-04-03
•
Granted: 1974-08-20
•
Expires: 1992-04-03
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Abstract

Abstract Copper alloy for plastic-working molds, containing as other principal components aluminum, beryllium, silicon and cobalt, having a value of 9 to 18 weight percent, calculated by an aluminum conversion formula Al + 1.8 percent Be + 1.5 percent Si and 1.5 percent Co, all in weight percent, and containing 6 to 15 percent Al, 0.6 to 2 percent Be, 0.9 to 3.5 percent Si, 0.5 to 2.5 percent Co and the balance Cu, the alloy being characterized by readiness to be used in the as-cast state without being subjected to heat treatment, and having excellent wear resistance under load, as well as high toughness and other desirable mechanical properties. In some cases, the alloy may additionally contain as secondary elements at least one of the elements Sn, Zn, Mn, Fe and Zr. The alloys are particularly suitable for dies in deep drawing, which are required to have high mechanical strength and wear resistance.

Inventors

  • 👤 S Watanabe
  • 👤 M Maeda
  • 👤 M Yamaguchi

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 08:55
CPC Classifications
C; C22; C22C; C22C9/00; C22C9/01

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 52 words
A copper base alloy consisting of 7.3 weight % Al, 0.6 wt% Be, 1.5 wt% Si, 1 wt% Co, and 89.6 wt% Cu, the alloy being characterized by readiness to be used in the as-cast state without being subjected to heat treatment, and having excellent wear resistance under load, and high toughness.
Claim 2
Dependent Claim 87 words
A copper base alloy consisting of 8.2 weight % Al, 0.78 wt% Be, 2.2 wt% Si, 0.8 wt% Co, 2 wt% Sn, additionally containing as secondary elements at least one of the elements: up to 5 wt% Zn, up to 5 wt% Mn, up to 3 wt% Fe, and up to 0.3 wt% Zr, and the balance Cu the alloy being characterized by readiness to be used in the as-cast state without being subjected to heat treatment, and having excellent wear resistance under load, and high toughness.
Claim 3
Dependent Claim 87 words
A copper base alloy consisting of 8.1 weight % Al, 0.81 wt% Be, 2.25 wt% Si, 0.6 wt% Co, 2.5 wt% Zn, additionally containing as secondary elements at least one of the elements: up to 5 wt% Sn, up to 5 wt% Mn, up to 3 wt% Fe, and up to 0.3 wt% Zr, and the balance Cu the alloy being characterized by readiness to be used in the as-cast state without being subjected to heat treatment, and having excellent wear resistance under load, and high toughness.
Claim 4
Dependent Claim 86 words
A copper base alloy consisting of 8.2 wt% Al, 0.81 wt% Be, 2.2 wt% Si, 0.7 wt% Co, 2.5 wt% Mn, additionally containing as secondary elements at least one of the elements: up to 5 wt% Sn, up to 5 wt% Zn, up to 3 wt% Fe, and up to 0.3 wt% Zr, and the balance Cu the alloy being characterized by readiness to be used in the as-cast state without being subjected to heat treatment, and having excellent wear resistance under load, and high toughness.
Claim 5
Dependent Claim 83 words
A copper base alloy consisting of 7.8 weight % Al, 0.8 wt% Be, 2 wt% Si, 0.8 wt% Co, 1.5 wt% Sn, 3.2 wt% Zn, 2 wt% Mn, additionally containing as secondary elements at least one of the elements: up to 3 wt% Fe, and up to 0.3 wt% Zr, and the balance Cu the alloy being characterized by readiness to be used in the as-cast state without being subjected to heat treatment, and having excellent wear resistance under load, and high toughness.

References Cited (Backward Citations)

AT138568B Cited
US1920699A Cited
US1957214A Cited
US1959154A Cited
GB519902A Cited
US2400566A Cited
GB725679A Cited
US3201234A Cited
US3459544A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-08-19 1978-02-18 1978-08-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-08-19 1982-02-18 1982-08-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-08-19 1986-02-18 1986-08-20 $7700.00 Window Closed / Lapsed

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