Patents by Inventor Hans-Joachim Kratz

Hans-Joachim Kratz 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).

  • High strength multi-phase steel, and method for producing a strip from said steel
    Patent number: 10519525
    Abstract: A high-strength multi-phase steel having tensile strengths of no less than 580 MPa, preferably with a dual-phase structure for a cold-rolled or hot-rolled steel strip having improved forming properties, in particular for lightweight vehicle construction is disclosed, containing the following elements (contents in % by mass): C 0.075 to ?0.105; Si 0.200 to ?0.300; Mn 1.000 to ?2.000; Cr 0.280 to ?0.480; Al 0.10 to ?0.060; P ?0.020; Nb ?0.005 to ?0.025; N ?0.0100; S ?0.0050; the remainder iron, including conventional steel-accompanying elements not mentioned above.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: December 31, 2019
    Assignee: SALZGITTER FLACHSTAHL GMBH
    Inventors: Thomas Schulz, Andreas Wedemeier, Michael Pohl, Hans-Joachim Kratz, Matthias Geler, Oliver Meyer
  • HIGH STRENGTH MULTI-PHASE STEEL, AND METHOD FOR PRODUCING A STRIP FROM SAID STEEL
    Publication number: 20150034215
    Abstract: A high-strength multi-phase steel having tensile strengths of no less than 580 MPa, preferably with a dual-phase structure for a cold-rolled or hot-rolled steel strip having improved forming properties, in particular for lightweight vehicle construction is disclosed, containing the following elements (contents in % by mass): C 0.075 to ?0.105; Si 0.200 to ?0.300; Mn 1.000 to ?2.000; Cr 0.280 to ?0.480; Al 0.10 to ?0.060; P ?0.020; Nb ?0.005 to ?0.025; N ?0.0100; S ?0.0050; the remainder iron, including conventional steel-accompanying elements not mentioned above.
    Type: Application
    Filed: February 27, 2013
    Publication date: February 5, 2015
    Inventors: Thomas Schulz, Andreas Wedemeier, Michael Pohl, Hans-Joachim Kratz, Matthias Geler, Oliver Meyer