Patents Assigned to PM Hochtemperatur-Metall GmbH
  • Process for producing a riveted joint by forming a rivet head onto a heated rivet pin using a riveting tool
    Patent number: 5414922
    Abstract: The invention relates to a process for producing a riveted joint using a riveting tool. The essential feature is that a pin-shaped blank of a recrystallized, coarse-grained iron-based or nickel-based ODS superalloy having a grain elongation in the longitudinal direction of 5:1 to 50:1 is used for the rivets. The production of the rivet heads is performed under defined process temperatures, at a pin temperature between 600.degree. and 1000.degree. C. and at a tool temperature between 50.degree. and 300.degree. C.
    Type: Grant
    Filed: September 21, 1993
    Date of Patent: May 16, 1995
    Assignee: PM Hochtemperatur-Metall GmbH
    Inventors: Georg Korb, Dieter Sporer
  • Nickel-base superalloy
    Patent number: 5294239
    Abstract: In section bars and shaped bodies made of nickel-base superalloys having a structure consisting of columnar grains, a complete recrystallization cannot be effected unless the heating-up rate is kept below a maximum heating-up rate T.sub.max, which depends on the ratio V of one or more of the metal carbide-forming elements hafnium, niobium, tantalum, titanium and zirconium to one or both of the metal carbide-forming elements tungsten and molybdenum.
    Type: Grant
    Filed: May 6, 1991
    Date of Patent: March 15, 1994
    Assignee: PM Hochtemperatur-Metall GmbH
    Inventors: Klaus Zoltzer, Klaus Lempenauer, Hellmut Fischmeister