Metal gasket
AssigneeFederal-Mogul World Wide, Inc.
InventorThomas Zurfluh
Life of this patent
Estimating the term…
Abstract
A metal gasket formed from a suitable iron-nickel chromium alloy includes at least one embossment that exhibits essentially full functional recovery at temperatures exceeding 1000° F. and including in the range of 1100° F. to 1600° F. or more and which is made from sheet material that is work hardened and strengthened by cold rolling, or a combination of cold rolling and precipitation hardening, without any post embossment heat treating that would act to further harden the material. Suitable iron-nickel-chromium alloys include those comprising, by weight, greater than 18% nickel; greater than 14% chrome and 0.1-10% of at least one element selected from the group consisting of Mo, Ti, V, Al, Co, Nb, Ta and Cu, with the balance being substantially Fe, wherein the gasket sheet alloy has a deformed microstructure.
Claims11
A metal gasket, comprising:
- a gasket sheet having at least one embossed sealing bead made from an alloy comprising, by weight:
- 18-28% Ni;
- 18-23% Cr;
- up to 8% Mo;
- up to 1.5% Cu;
- up to 1% Si;
- up to 3% Mn;
- up to 0.6% Ti;
- up to 0.6% Al;
- up to 0.08% C;
- up to 0.015% S;
- up to 0.03% P;
- up to 0.4% N;
- and the balance substantially Fe, said sealing bead of said gasket sheet having a residual cold-worked microstructure as embossed.
A metal gasket comprising:
- a gasket sheet having at least one embossed sealing bead made from an alloy comprising, by weight wherein said alloy comprises, by weight:
- 24-27% Ni;
- 13.5-16% Cr;
- 1-1.5% Mo;
- up to 1% Si;
- up to 2% Mn;
- 1.90-2.30% Ti;
- up to 0.35% Al;
- 0.1-0.5% V;
- 0.003-0.01% B;
- 0-0.08% C;
- and the balance substantially Fe, said sealing bead of said gasket sheet having a residual cold-worked microstructure as embossed.
A metal gasket, comprising:
- a gasket sheet having at least one embossed sealing bead made from an iron-nickel-chromium alloy, said embossed sealing bead being sealably operable with substantially full functional recovery in a fully-clamped, sealed joint at a temperature of greater than 1100° F. and up to 1200° F., said sealing bead having a residual as-embossed cold-workedmicrostructure wherein said iron- nickel-chromium alloy comprises, by weight:
- 18-28% Ni;
- 18-23% Cr;
- up to 8% Mo;
- up to 1.5% Cu;
- up to 1% Si;
- up to 3% Mn;
- up to 0.6% Ti;
- up to 0.6% Al;
- up to 0.08% C;
- up to 0.015% S;
- up to 0.03% P;
- up to 0.4% N;
- and the balance substantially Fe.
Dependencies are inferred from the claim text.