Patents Assigned to WUHAN IRON AND STEEL COMPANY LIMITED
  • 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