Patents Examined by Nicole Loy
  • Process for the inhibition control in the production of grain-oriented electrical sheets
    Patent number: 6361620
    Abstract: In the production of grain-oriented electrical steel strip, the grain growth inhibition is controlled by balancing the copper, aluminum and carbonium content in order to control the type and quantity of precipitated second phases and obtain optimum grain dimensions during the decarburization annealing. This is done by using a continuous high-temperature thermal treatment in which nitrogen is diffused into the steel strip and aluminum is directly precipitated as aluminum nitride which controls the grain orientation of the final product.
    Type: Grant
    Filed: December 9, 1999
    Date of Patent: March 26, 2002
    Assignee: Acciai Speciali Terni S.p.A.
    Inventors: Stefano Cicale′, Stefano Fortunati, Giuseppe Abbruzzese