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US3753800A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of making nickel-chromium-beryllium alloy

Assignee: Duracell Inc USA
•
Filing: 1971-04-21
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Granted: 1973-08-21
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Expires: 1991-04-21
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Abstract

Abstract This invention relates to a method of making nickel-chromiumberyllium alloy having a microstructure which provides obstacles to plastic flow in the nickel rich matrix phase so that high strength properties are obtained at both room and elevated temperatures. The alloy may also contain other additives including aluminum and/or titanium together with hardeners including molybdenum and/or tungsten, with or without carbon. A method of processing the alloy comprises melting the alloying ingredients in a crucible while avoiding the presence of oxygen; raising the temperature to 1,450* to 1,550*C; casting the alloy in a mold. The alloy may be remelted and cast in an apparatus to effect abstraction of heat from the casting from one direction only to obtain a directionally orientated microstructure.

Inventors

  • 👤 L Griffiths
  • 👤 Y Shen

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 10:04
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/058

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 22 words
The method of claim 1 including the further step of treating the microstructure to elongate colonies of the rod-like Ni(Cr)Be phase uniaxially.
Claim 2
Dependent Claim 34 words
The method of claim 2, wherein the step of treating the microstructure includes the step of abstracting heat from the melt from one direction obtaining elongation of colonies of the rod-like Ni(Cr)Be phase uniaxially.
Claim 3
Dependent Claim 33 words
The method of claim 3, including the further steps of, prior to the step of abstracting heat from the melt, cooling the melt of Ni-Cr-Be type material and remelting the Ni-Cr-Be type material.
Claim 4
Dependent Claim 34 words
The method of claim 1, including the further step of adding to the melt up to about 5 atomic percent of a metal selected from the group consisting of Al, Ti or mixtures thereof.
Claim 5
Dependent Claim 42 words
The method of claim 1, including a further step of adding to the melt up to about 10 atomic percent of a metal selected from the group consisting of Mo, W, Nb, Zr, B, Va, Ta, Mn, Fe, Co or mixtures thereof.
Claim 6
Dependent Claim 67 words
The method of claim 1, including the further step of adding to the melt up to about 5 atomic percent of a metal selected from the group consisting of Al, Ti or mixures thereof, and adding to the melt up to about 10 atomic percent of a metal selected from the group consisting of Mo, W, Ta, Nb, Va, Zr, B, Mn, Fe, Co or mixtures thereof.
Claim 7
Dependent Claim 61 words
The method of claim 5, including the further steps of heating the Ni-Cr-Be type material containing the additive metal or mixtures of additive metals for a sufficient time to dissolve additive metal or mixtures of additive metals in solid solution, and strengthening the Ni-Cr-Be type material by holding the material below the solution temperature for a sufficient time to effect strengthening.

References Cited (Backward Citations)

US2089587A Cited
US2150255A Cited
US2469718A Cited
US3260505A Cited
US3464817A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-08-20 1977-02-19 1977-08-21 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-08-20 1981-02-19 1981-08-21 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-08-20 1985-02-19 1985-08-21 $7700.00 Window Closed / Lapsed

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