Patents by Inventor Henry Wisell

Henry Wisell 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).

  • Steel and a heat treated tool thereof manufactured by an integrated powder metalurgical process and use of the steel for tools
    Patent number: 6162275
    Abstract: The invention relates to a steel having the following alloy composition in weight-%: 1.4-1.6 (C+N), max. 0.6 Mn, max. 1.2 Si, 3.5-4.3 Cr, 1.5-3 Mo, 1.5-3 W, wherein 6<W.sub.eq <9, and W.sub.eq =% W+2.times.% Mo, 3.5-4.5 V, max. 0.3 S, max. 0.3 Cu, max. 1 Co, a total amount of max. 1.0 of Nb+Ta+Ti+Zr+Al, a total amount of 0.5 of other elements, including impurities and accessory elements in normal amounts, balance iron, and with a microstructure substantially consisting of a martensitic matrix and in the matrix 2-15, preferably 5-10 volume-% undissolved hard products having the particle size 0.1-3 .mu.m, said hard products being of MX-type, where M is V and X is C and/or N, wherein 40-60% of the C and N content of the alloy is bound to vanadium as carbides and/or as carbo-nitrides, and a functional amount of hard products precipitated in the martensitic matrix after solution heat treatment of the steel at a temperature between 1000 and 1225.degree. C. and tempering at least twice for at least 0.
    Type: Grant
    Filed: June 17, 1999
    Date of Patent: December 19, 2000
    Assignee: Erasteel Kloster Aktiebolag
    Inventors: Karin Jonsson, Henry Wisell, Leif Westin
  • High-speed steel manufactured by powder metallurgy
    Patent number: 5578773
    Abstract: The invention relates to a high-speed steel which is manufactured powder-metallurgically and has the following chemical composition: 2.2-2.7 C, from traces to max 1.0 Si, from traces to max 1.0 Mn, 3.5-4.5 Cr, 2.5-4.5 Mo, 2.5-4.5 W, 7.5-9.5 V, with the balance being substantially iron and incidental impurities and accessory elements. The steel is suitable particularly for tools having a high wear resistance.
    Type: Grant
    Filed: February 4, 1994
    Date of Patent: November 26, 1996
    Assignee: Erasteel Kloster Aktiebolag
    Inventor: Henry Wisell
  • High speed steel manufactured by powder metallurgy
    Patent number: 5525140
    Abstract: The invention relates to a high-speed steel with good hardness and high wear resistance, which is manufactured powder-metallurgically and has the following alloy composition in weight-%: 1.0-2.5 C, max 1.0 Si, max 1.0 Mn, - 3-5 Cr, 2-8 Mo, 3-8 W, 1.3-7 V, 14-22 Co, 0-2 Nb, with the balance being substantially iron and incidental impurities and accessory elements. The steel has been designed particularly for tools, the use of which demands a good hot hardness and high wear strength.
    Type: Grant
    Filed: February 4, 1994
    Date of Patent: June 11, 1996
    Assignee: Erasteel Kloster Aktiebolag
    Inventor: Henry Wisell
  • High speed steel manufactured by power metallurgy
    Patent number: 5435827
    Abstract: A high speed steel which has been manufactured power metallurgically and has the following chemical composition in weight-%: 0.6-0.9 C, from traces to max 1.0 Si, from traces to max 1.0 Mn, 3-5 Cr, 0-5 Mo, 0-10 W, where (Mo+W/2) shall be at least 4, 0.7-2 V, max 14 Co, 0.7-1.5 Nb, with the balance being substantially iron, incidental impurities and accessory elements in normal amounts. The steel is suited for tools the use of which require a high toughness, a suitable hardness and strength.
    Type: Grant
    Filed: February 4, 1994
    Date of Patent: July 25, 1995
    Assignee: Erasteel Kloster Aktiebolag
    Inventor: Henry Wisell