Patents by Inventor Jan-Olof Nilsson

Jan-Olof Nilsson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for the manufacture of steel products of a precipitation hardened martensitic steel, steel products obtained with such method and use of said steel products
    Publication number: 20030094218
    Abstract: A method for the manufacture of steel products and products thus produced, wherein steel is subjected to precipitation hardening in a martensitic structure subsequent to soft annealing and thereafter shaping. The method steps include shaping followed by solution annealing between 1200° C. and 1050° C., quenching from the solution annealing temperature with a quenching speed of at least 5° C. per second to a temperature below 500° C., subjecting said steel to an isothermal martensitic transformation and subsequently hardening the steel at a temperature between 450° C. and 550° C. to precipitate particles out from solution into said martensitic structure.
    Type: Application
    Filed: December 23, 2002
    Publication date: May 22, 2003
    Inventors: Jan-Olof Nilsson, Soren Olsson, Hubert Sjoerd Blaauw, Adriaan Van der Grijn
  • Method for the manufacture of steel products of a precipitation hardened martensitic steel, steel products obtained with such method and use of said steel products
    Patent number: 6531007
    Abstract: A method for the manufacture of steel products and products thus produced, wherein steel is subjected to precipitation hardening in a martensitic structure subsequent to soft annealing and thereafter shaping. The method steps include shaping followed by solution annealing between 1200° C. and 1050° C., quenching from the solution annealing temperature with a quenching speed of at least 5° C. per second to a temperature below 500° C., subjecting said steel to an isothermal martensitic transformation and subsequently hardening the steel at a temperature between 450° C. and 550° C. to precipitate particles out from solution into said martensitic structure.
    Type: Grant
    Filed: August 23, 2000
    Date of Patent: March 11, 2003
    Assignees: Sandvik AB, Koninklijke Philips Electronics, N.V.
    Inventors: Jan-Olof Nilsson, Sören Olsson, Hubert Sjoerd Blaauw, Adriaan Van der Grijn
  • Method of precipitation hardening a metal alloy
    Patent number: 5759308
    Abstract: A precipitation hardened metallic alloy is provided in which the strengthening is based on the precipitation of particles. The strengthening particles have a quasicrystalline structure, said structure being essentially maintained at aging times up to 1000 h and tempering treatments up to 650.degree. C., the strengthening involving an increase in tensile strength of at least 200 MPa.
    Type: Grant
    Filed: January 3, 1997
    Date of Patent: June 2, 1998
    Assignee: Sandvik AB
    Inventors: Anna Hultin-Stigenberg, Jan-Olof Nilsson, Ping Liu
  • Quasicrystalline precipitation hardened metal alloy and method of making
    Patent number: 5632826
    Abstract: A precipitation hardened metallic alloy is provided in which the strengthening is based on the precipitation of particles. The strengthening particles have a quasicrystalline structure, said structure being essentially maintained at aging times up to 1000 h and tempering treatments up to 650.degree. C., the strengthening involving an increase in tensile strength of at least 200 MPa.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: May 27, 1997
    Assignee: Sandvik AB
    Inventors: Anna Hultin-Stigenberg, Jan-Olof Nilsson, Ping Liu