Patents by Inventor Shoichi KOUTANI

Shoichi KOUTANI 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).

  • Patent number: 11261935
    Abstract: Manufacturing a steel sheet for a steel belt includes hot rolling a steel slab containing, in mass %, 0.60 to 0.80% of C, 1.0% or less of Si, 0.10 to 1.0% of Mn, 0.020% or less P, 0.010% or less S, 0.1 to 1.0% of Cr, 0 to 0.5% of V, 0 to 0.1% of Ti, 0 to 0.1% of Nb, and 0 to 0.01% of B, the balance Fe and unavoidable impurities, under a finish hot rolling temperature of 800 to 900° C. An average cooling rate from finish rolling to coiling is 20° C. per second or more. A coiling temperature is 450 to 650° C. The hot-rolled slab is cold rolled with a total rolling reduction ratio of 40% or more and a reduction ratio per one pass of less than 12%, without performing a heat treatment. The cold-rolled slab is aged at 200 to 500° C. for 0.5 to 30 hours.
    Type: Grant
    Filed: January 10, 2019
    Date of Patent: March 1, 2022
    Assignee: NIPPON STEEL NISSHIN CO., LTD.
    Inventors: Satoshi Tagashira, Shoichi Koutani, Koji Omosako
  • Publication number: 20190154111
    Abstract: Manufacturing a steel sheet for a steel belt includes hot rolling a steel slab containing, in mass %, 0.60 to 0.80% of C, 1.0% or less of Si, 0.10 to 1.0% of Mn, 0.020% or less P, 0.010% or less S, 0.1 to 1.0% of Cr, 0 to 0.5% of V, 0 to 0.1% of Ti, 0 to 0.1% of Nb, and 0 to 0.01% of B, the balance Fe and unavoidable impurities, under a finish hot rolling temperature of 800 to 900° C. An average cooling rate from finish rolling to coiling is 20° C. per second or more. A coiling temperature is 450 to 650° C. The hot-rolled slab is cold rolled with a total rolling reduction ratio of 40% or more and a reduction ratio per one pass of less than 12%, without performing a heat treatment. The cold-rolled slab is aged at 200 to 500° C. for 0.5 to 30 hours.
    Type: Application
    Filed: January 10, 2019
    Publication date: May 23, 2019
    Inventors: Satoshi TAGASHIRA, Shoichi KOUTANI, Koji OMOSAKO
  • Publication number: 20160131222
    Abstract: Manufacturing a steel sheet for a steel belt includes hot rolling a steel slab containing, in mass %, 0.60 to 0.80% of C, 1.0% or less of Si, 0.10 to 1.0% of Mn, 0.020% or less P, 0.010% or less S, 0.1 to 1.0% of Cr, 0 to 0.5% of V, 0 to 0.1% of Ti, 0 to 0.1% of Nb, and 0 to 0.01% of B, the balance Fe and unavoidable impurities, under a finish hot rolling temperature of 800 to 900° C. An average cooling rate from finish rolling to coiling is 20° C. per second or more. A coiling temperature is 450 to 650° C. The hot-rolled slab is cold rolled with a total rolling reduction ratio of 40% or more and a reduction ratio per one pass of less than 12%, without performing a heat treatment. The cold-rolled slab is aged at 200 to 500° C. for 0.5 to 30 hours.
    Type: Application
    Filed: June 5, 2014
    Publication date: May 12, 2016
    Inventors: Satoshi TAGASHIRA, Shoichi KOUTANI, Koji OMOSAKO