Patents by Inventor Akihiro Matsuzawa

Akihiro Matsuzawa 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).

  • Environmentally friendly flux for molten steel desulfurization
    Patent number: 9127327
    Abstract: An environmentally friendly flux for molten steel desulfurization includes CaO and Al2O3 so that [CaO]/[Al2O3] is within a range of 1.6 to 3.0, and includes one or more alkali metal oxides of Na2O, K2O, and Li2O, and SiO2 so that [SiO2]/[R2O] is within a range of 0.1 to 3, [R2O] is within a range of 0.5 mass % to 5 mass %, and [SiO2] is within a range of 0.05 mass % to 15 mass % in a case in which the [CaO], the [Al2O3], the [SiO2], and the [R2O] represent the mass % of CaO, the mass % of Al2O3, the mass % of SiO2, and the total amount of the mass % of Na2O, the mass % of K2O, and the mass % of Li2O respectively.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: September 8, 2015
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Masamitsu Wakoh, Akihiro Matsuzawa, Katsuhiro Fuchigami, Kohsuke Kume, Yuji Ogawa
  • ENVIRONMENTALLY FRIENDLY FLUX FOR MOLTEN STEEL DESULFURIZATION
    Publication number: 20130333518
    Abstract: An environmentally friendly flux for molten steel desulfurization includes CaO and Al2O3 so that [CaO]/[Al2O3] is within a range of 1.6 to 3.0, and includes one or more alkali metal oxides of Na2O, K2O, and Li2O, and SiO2 so that [SiO2]/[R2O] is within a range of 0.1 to 3, [R2O] is within a range of 0.5 mass % to 5 mass %, and [SiO2] is within a range of 0.05 mass % to 15 mass % in a case in which the [CaO], the [Al2O3], the [SiO2], and the [R2O] represent the mass % of CaO, the mass % of Al2O3, the mass % of SiO2, and the total amount of the mass % of Na2O, the mass % of K2O, and the mass % of Li2O respectively.
    Type: Application
    Filed: March 30, 2012
    Publication date: December 19, 2013
    Inventors: Masamitsu Wakoh, Akihiro Matsuzawa, Katsuhiro Fuchigami, Kohsuke Kume, Yuji Ogawa
  • Method of Production of Ultralow Carbon Cast Slab
    Publication number: 20090288799
    Abstract: A method of production of an ultralow carbon cast slab characterized by adding Ti to molten steel decarburized to a carbon concentration of 0.01 mass % or less, further adding at least one of Ce, La, and Nd, and using an immersion nozzle to inject the above molten steel from a tundish to a casting mold for continuous casting while maintaining a flow rate of Ar gas blown from any location in a range from a tundish upper nozzle to discharge ports of said immersion nozzle at 3 Nl (normal liter)/min or less.
    Type: Application
    Filed: October 27, 2006
    Publication date: November 26, 2009
    Inventors: Masafumi Miyazaki, Akihiro Matsuzawa, Katsuhiro Sasai, Wataru Ohashi, Yasuhiko Ohtani, Katsunori Yamada, Masahiro Doki, Go Hirata, Yoshiaki Kimura, Hajime Hasegawa