Patents by Inventor Guoli Zhai

Guoli Zhai 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-toughness seamless steel tube for automobile safety airbag and manufacturing method therefor
    Patent number: 10494690
    Abstract: A high strength and toughness seamless steel tube for an automobile airbag, comprising the following elements, by wt %: C: 0.05-0.15%; Si: 0.1-0.45%; Mn: 1.0-1.9%; Ni: 0.1-0.6%; Cr: 0.05-1.0%; Mo: 0.05-0.2%; Cu: 0.05-0.50%; Al: 0.015-0.060%; Nb: 0.02-0.1%; V: 0.02-0.15%; and the balance being Fe and other inevitable impurities. A method for manufacturing the seamless steel tube comprises the steps: (1) heating a tube blank and then soaking; (2) hot piercing, reducing the diameter and the wall thickness of the tube blank with a stretch reducer and then cooling naturally; (3) annealing, pickling, phosphating and saponifying; (4) cold working to obtain a finished product size; and (5) carrying out stress relief annealing treatment.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: December 3, 2019
    Assignee: Boashan Iron & Steel Co., Ltd.
    Inventors: Guoli Zhai, Qingchao Tian, Qijiang Wang, Cailing Liu
  • HIGH-TOUGHNESS SEAMLESS STEEL TUBE FOR AUTOMOBILE SAFETY AIRBAG AND MANUFACTURING METHOD THEREFOR
    Publication number: 20180187277
    Abstract: A high strength and toughness seamless steel tube for an automobile airbag, comprising the following elements, by wt %: C: 0.05-0.15%; Si: 0.1-0.45%; Mn: 1.0-1.9%; Ni: 0.1-0.6%; Cr: 0.05-1.0%; Mo: 0.05-0.2%; Cu: 0.05-0.50%; Al: 0.015-0.060%; Nb: 0.02-0.1%; V: 0.02-0.15%; and the balance being Fe and other inevitable impurities. A method for manufacturing the seamless steel tube comprises the steps: (1) heating a tube blank and then soaking; (2) hot piercing, reducing the diameter and the wall thickness of the tube blank with a stretch reducer and then cooling naturally; (3) annealing, pickling, phosphating and saponifying; (4) cold working to obtain a finished product size; and (5) carrying out stress relief annealing treatment.
    Type: Application
    Filed: January 14, 2015
    Publication date: July 5, 2018
    Applicant: BAOSHAN IRON & STEEL CO.,LTD.
    Inventors: Guoli Zhai, Qingchao Tian, Qijiang Wang, Cailing Liu