Patents by Inventor Xinping MAO

Xinping MAO 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: 11124851
    Abstract: A press hardening steel by a thin slab and having a tensile strength of 1900 MPa or more includes following components by weight: C: 0.31-0.40%, Si: 0.36-0.44%, Mn: 1.6-2.0%, P?0.006%, S?0.004%, Als: 0.015-0.060%, Cr: 0.36-0.49%, Ti: 0.036-0.045% or Nb: 0.036-0.045% or V: 0.036-0.045% or a mixture of any two or more of the above in any proportion, B: 0.004-0.005%, Mo: 0.26-0.35%, and N?0.005%. A method for producing the press hardening steel includes following steps: molten iron desulphurization; smelting and refining by an electric furnace or converter; continuous casting; descaling treatment before entering a soaking furnace; heating and soaking; high pressure water descaling before entering a rolling mill; hot rolling; cooling; coiling; austenitizing; die deforming and quenching.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: September 21, 2021
    Assignee: WUHAN IRON AND STEEL COMPANY LIMITED
    Inventors: Xinping Mao, Libo Pan, Kuanhui Hu, Shuize Wang, Rui Ge, Lijun Li, Tao Peng, Xiaoping Duan, Fang Fang
  • Patent number: 10995380
    Abstract: A press hardening steel by a thin slab casting and direct rolling has a tensile strength of 1500 MPa or more. The press hardening steel has a components by weight percent: C: 0.21-0.25%, Si: 0.26-0.30%, Mn: 1.0-1.3%, P?0.01%, S?0.005%, Als: 0.015-0.060%, Cr: 0.25-0.30%, Ti: 0.026-0.030% or Nb: 0.026-0.030% or V: 0.026-0.030%, or a mixture of two or more of the above in any proportion; B: 0.003-0.004%, and N?0.005%. A method for producing the press hardening steel includes following steps: hot metal desulphurization; electric-furnace or converter smelting and refining; continuous casting; descaling, then entering a soaking furnace; heating and soaking; high-pressure water descaling, then entering a rolling mill; hot rolling; cooling; coiling; austenitizing; die deforming and quenching.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: May 4, 2021
    Assignee: WUHAN IRON AND STEEL COMPANY LIMITED
    Inventors: Xinping Mao, Kuanhui Hu, Shuize Wang, Libo Pan, Rui Ge, Lijun Li, Tao Peng, Xiaofeng Du, Wenqiang Zhou
  • Patent number: 10988820
    Abstract: A press hardening steel by a medium thin slab and having a tensile strength of 1500 MPa or more, includes following components by weight percent: C: 0.21%-0.25%, Si: 0.26%-0.30%, Mn: 1.0%-1.3%, P?0.01%, S?0.005%, Als: 0.015%-0.060%, Cr: 0.25%-0.30%, Ti: 0.026%-0.030% or Nb: 0.026%-0.030% or V: 0.026%-0.030% or a mixture of any two or more of the above in any proportion, B: 0.003%-0.004%, Mo: 0.17-0.19% and N?0.005%. A method for producing the press hardening steel includes following steps: molten iron desulphurization; smelting and refining by an electric furnace or converter; continuous casting; descaling treatment before entering a soaking furnace; hating and soaking; high pressure water descaling before entering a rolling mill; hot rolling; cooling; coiling; austenitizing; die deforming and quenching.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: April 27, 2021
    Assignee: WUHAN IRON AND STEEL COMPANY LIMITED
    Inventors: Xinping Mao, Kuanhui Hu, Shuize Wang, Libo Pan, Rui Ge, Lijun Li, Tao Peng, Xiaofeng Du, Fang Fang
  • Publication number: 20190185953
    Abstract: A press hardening steel by a thin slab and having a tensile strength of 1900 MPa or more includes following components by weight: C: 0.31-0.40%, Si: 0.36-0.44%, Mn: 1.6-2.0%, P?0.006%, S?0.004%, Als: 0.015-0.060%, Cr: 0.36-0.49%, Ti: 0.036-0.045% or Nb: 0.036-0.045% or V: 0.036-0.045% or a mixture of any two or more of the above in any proportion, B: 0.004-0.005%, Mo: 0.26-0.35%, and N?0.005%. A method for producing the press hardening steel includes following steps: molten iron desulphurization; smelting and refining by an electric furnace or converter; continuous casting; descaling treatment before entering a soaking furnace; heating and soaking; high pressure water descaling before entering a rolling mill; hot rolling; cooling; coiling; austenitizing; die deforming and quenching.
    Type: Application
    Filed: August 1, 2017
    Publication date: June 20, 2019
    Applicant: WUHAN IRON AND STEEL COMPANY LIMITED
    Inventors: Xinping MAO, Libo PAN, Kuanhui HU, Shuize WANG, Rui GE, Lijun LI, Tao PENG, Xiaoping DUAN, Fang FANG
  • Publication number: 20190185952
    Abstract: A press hardening steel by a thin slab casting and direct rolling has a tensile strength of 1500 MPa or more. The press hardening steel has a components by weight percent: C: 0.21-0.25%, Si: 0.26-0.30%, Mn: 1.0-1.3%, P?0.01%, S?0.005%, Als: 0.015-0.060%, Cr: 0.25-0.30%, Ti: 0.026-0.030% or Nb: 0.026-0.030% or V: 0.026-0.030%, or a mixture of two or more of the above in any proportion; B: 0.003-0.004%, and N?0.005%. A method for producing the press hardening steel includes following steps: hot metal desulphurization; electric-furnace or converter smelting and refining; continuous casting; descaling, then entering a soaking furnace; heating and soaking; high-pressure water descaling, then entering a rolling mill; hot rolling; cooling; coiling; austenitizing; die deforming and quenching.
    Type: Application
    Filed: August 1, 2017
    Publication date: June 20, 2019
    Applicant: WUHAN IRON AND STEEL COMPANY LIMITED
    Inventors: Xinping MAO, Kuanhui HU, Shuize WANG, Libo PAN, Rui GE, Lijun LI, Tao PENG, Xiaofeng DU, Wenqiang ZHOU
  • Publication number: 20190177811
    Abstract: A press hardening steel by a medium thin slab and having a tensile strength of 1500 MPa or more, includes following components by weight percent: C: 0.21%-0.25%, Si: 0.26%-0.30%, Mn: 1.0%-1.3%, P?0.01%, S?0.005%, Als: 0.015%-0.060%, Cr: 0.25%-0.30%, Ti: 0.026%-0.030% or Nb: 0.026%-0.030% or V: 0.026%-0.030% or a mixture of any two or more of the above in any proportion, B: 0.003%-0.004%, Mo: 0.17-0.19% and N?0.005%. A method for producing the press hardening steel includes following steps: molten iron desulphurization; smelting and refining by an electric furnace or converter; continuous casting; descaling treatment before entering a soaking furnace; hating and soaking; high pressure water descaling before entering a rolling mill; hot rolling; cooling; coiling; austenitizing; die deforming and quenching.
    Type: Application
    Filed: August 1, 2017
    Publication date: June 13, 2019
    Applicant: Wuhan Iron and Steel Company Limited
    Inventors: Xinping MAO, Kuanhui HU, Shuize WANG, Libo PAN, Rui GE, Lijun LI, Tao PENG, Xiaofeng DU, Fang FANG
  • Publication number: 20190169708
    Abstract: A press hardening steel by a medium and thin slab casting and direct rolling has a tensile strength 1900 MPa or more. The press hardening steel includes following chemical components by weight percent: C: 0.31-0.40%, Si: 0.36-0.44%, Mn: 1.6-2.0%, P?0.006%, S?0.004%, Als: 0.015-0.060%, Cr: 0.36-0.49%, Ti: 0.036-0.045% or Nb: 0.036-0.045% or V: 0.036-0.045%, or a mixture of the above two or more in any ratio, B: 0.004-0.005%, Mo: 0.26-0.35%, Ni: 0.11-0.20%, and N?0.005%. A method for producing the press hardening steel includes following steps: desulphurizing molten iron; electric furnace or converter smelting and refining; continuous casting; descaling treatment before entering a soaking furnace; heating and soaking; high-pressure water descaling before entering a rolling mill; hot rolling; cooling; coiling; austenitizing; die deforming and quenching.
    Type: Application
    Filed: August 1, 2017
    Publication date: June 6, 2019
    Applicant: WUHAN IRON AND STEEL COMPANY LIMITED
    Inventors: Xinping MAO, Shuize WANG, Kuanhui HU, Libo PAN, Rui GE, Lijun LI, Tao PENG, Xiaoping DUAN, Xiaofeng DU
  • Publication number: 20080279713
    Abstract: A weathering steel consisting essentially of C in the range of from 0.03 to 0.07 percent by weight; Si in the range of from 0.15 to 0.29 percent by weight; Mn in the range of from 1.21 to 1.5 percent by weight; P in the range of from 0.006 to 0.04 percent by weight; S in the range of from 0.001 to 0.01 percent by weight; Cu in the range of from 0.2 to 0.5 percent by weight; Cr in the range of from 0.3 to 0.7 percent by weight; Ni in the range of from 0.15 to 0.35 percent by weight; Ti in the range of from 0.08 to 0.14 percent by weight; and the balance is essentially iron; and methods for producing the same.
    Type: Application
    Filed: July 23, 2008
    Publication date: November 13, 2008
    Applicant: GUANGZHOU ZHUJIANG STEEL CO., LTD
    Inventors: Xinping MAO, Zhenyuan LIN, Kexin LI, Jixiang GAO, Yijun LIU, Qilin CHEN, Jinsong XIE
  • Publication number: 20080110592
    Abstract: Taught is a method for producing 700 MPa high strength weathering steel, comprising employing a thin slab casting and rolling technology, comprising (a) smelting at a charging temperature to produce molten steel, (b) refining said molten steel at a tapping temperature, (c) thin slab continuous casting of a casting billet, (d) soaking of said casting billet, (e) hot continuous rolling of said casting billet at a finishing temperature, (f) laminar cooling of said casting billet, and (g) coiling of said casting billet at a coiling temperature, wherein C is present in the molten steel in the range of from 0.03 to 0.07 percent by weight; Si is present in the molten steel in the range of from 0.3 to 0.5 percent by weight; Mn is present in the molten steel in the range of from 0.6 to 1.6 percent by weight; P is present in the molten steel in the range of less or equal to 0.04 percent by weight; S is present in the molten steel in the range of less or equal to 0.
    Type: Application
    Filed: November 12, 2007
    Publication date: May 15, 2008
    Applicant: GUANGZHOU ZHUJIANG STEEL CO., LTD.
    Inventors: Xinping MAO, Zhenyuan LIN, Kexin LI, Jixiang GAO, Yijun LIU, Qilin CHEN, Jinsong XIE