Patents by Inventor Donghe SONG

Donghe SONG 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).

  • Publication number: 20220364197
    Abstract: A preparation method of glassless grain-oriented silicon steel includes the following operations. During a decarburization annealing, a thickness of an oxide film on a surface of strip is 1.5-2.5 ?m; an atomic weight ratio of Si element and Fe element in the oxide film satisfies: Si/(Si+Fe)?0.76; during a high-temperature annealing, a cooling stage includes sequentially: cooling with an inner cover when a temperature drops from 1200° C. to 500° C.; wherein a protective gas is a mixed gas containing nitrogen and hydrogen, and a volume percentage of the hydrogen in the mixed gas is >3%; cooling with the inner cover when the temperature drops from 500° C. to 200° C.; wherein the protective gas is nitrogen; and cooling in air by removing the inner cover when the temperature is <200° C.
    Type: Application
    Filed: August 1, 2022
    Publication date: November 17, 2022
    Applicants: SHOUGANG ZHIXIN QIAN'AN ELECTROMAGNETIC MATERIAL CO., LTD., BEIJING SHOUGANG CO., LTD.
    Inventors: Xianhui WANG, Qian GAO, Maolin SUN, Jian GONG, Huiming XIAO, Zhaoyue LIU, Renhao TENG, Songshan ZHAO, Zhiyuan HU, Jiebin QI, Xuechang YOU, Ruifeng LI, Donghe SONG, Aixing WANG