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US4515870A Expired / Lapsed US ⏱️ 0.0 years remaining

Homogeneous, ductile iron based hardfacing foils

Assignee: Honeywell International Inc
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Filing: 1984-09-19
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Granted: 1985-05-07
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Expires: 2004-09-19
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Abstract

Abstract Hardfacing of metal parts employing a thin, homogeneous ductile foil is disclosed. The hardfacing foil has a composition consisting essentially of about 0 to about 25 atom percent cobalt, 0 to about 30 atom percent nickel, 0 to about 30 atom percent chromium, 0 to about 5 atom percent tungsten, 0 to about 4 atom percent molybdenum, about 2 to about 25 atom percent boron, 0 to about 15 atom percent silicon, and 0 to about 5 atom percent carbon, the balance being iron and incidental impurities with the proviso that the total or iron, cobalt, nickel, chromium, tungsten and molybdenum ranges from about 70 to 88 atom percent and the total of boron, silicon and carbon ranges from about 12 to 30 atom percent. The ductile foil permits continuous hardfacing of soft matrix, like low carbon and low alloy steels, imparting superior resistance to wear and corrosion.

Inventors

  • 👤 Debasis Bose
  • 👤 Amitava Datta
  • 👤 Nicholas J. DeCristofaro
  • 👤 Claude Henschel

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 00:55
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/02; B23K35/0255; B23K35/0261; B23K35/0277; B23K35/22; B23K35/24; B23K35/30; B23K35/3033; B23K35/3046; B23K35/3053; B23K35/308; B23K35/3093; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12431; Y10T428/12493; Y10T428/12771; Y10T428/12778; Y10T428/12861; Y10T428/12931; Y10T428/12937; Y10T428/12944; Y10T428/12951; Y10T428/12958; Y10T428/12965; Y10T428/12972; Y10T428/12979

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 131 words
A hardfaced metal article, said article having been hardfaced with a homogeneous, ductile hardfacing foil composed of metastable material having at least 50 percent glassy structure and a composition consisting of 0 to about 25 atom percent cobalt, 0 to about 30 atom percent nickel, 0 to about 30 atom percent chromium, 0 to 5 atom percent tungsten, 0 to about 4 atom percent molybdenum, 4 to 17 atom percent boron, 0 to about 15 atom percent silicon, and 0 to about 5 atom percent carbon, the balance being iron plus incidental impurities with the proviso that the total of iron, cobalt, nickel, chromium, tungsten and molybdenum ranges from about 70 to 88 atom percent and the total of boron, silicon and carbon ranges from about 12 to 30 atom percent.
Claim 2
Dependent Claim 131 words
A hardfaced metal article, said article having been hardfaced with a homogeneous, ductile hardfacing foil composed of metastable material having at least 50 percent glassy structure and a composition consisting of 0 to about 25 atom percent cobalt, 0 to about 30 atom percent nickel, 0 to about 30 atom percent chromium, 0 to 5 atom percent tungsten, 0 to about 4 atom percent molybdenum, 4 to 17 atom percent boron, 0 to about 15 atom percent silicon, and 0 to about 5 atom percent carbon, the balance being iron plus incidental impurities with the proviso that the total of iron, cobalt, nickel, chromium, tungsten and molybdenum ranges from about 70 to 88 atom percent and the total of boron, silicon and carbon ranges from about 12 to 30 atom percent.

References Cited (Backward Citations)

US30106A Cited
US3150994A Cited
USRE30106E Cited
US4194900A Cited
US4250229A Cited
US4337886A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1988-05-06 1988-11-05 1989-05-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1992-05-06 1992-11-05 1993-05-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1996-05-06 1996-11-05 1997-05-07 $7700.00 Window Closed / Lapsed

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