EP2871254A4 - HOT ROLLED STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME - Google Patents

HOT ROLLED STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME

Info

Publication number
EP2871254A4
EP2871254A4 EP13837646.2A EP13837646A EP2871254A4 EP 2871254 A4 EP2871254 A4 EP 2871254A4 EP 13837646 A EP13837646 A EP 13837646A EP 2871254 A4 EP2871254 A4 EP 2871254A4
Authority
EP
European Patent Office
Prior art keywords
manufacturing
same
steel sheet
rolled steel
hot rolled
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP13837646.2A
Other languages
German (de)
French (fr)
Other versions
EP2871254A1 (en
EP2871254B1 (en
Inventor
Chikara Kami
Sota Goto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
JFE Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JFE Steel Corp filed Critical JFE Steel Corp
Publication of EP2871254A1 publication Critical patent/EP2871254A1/en
Publication of EP2871254A4 publication Critical patent/EP2871254A4/en
Application granted granted Critical
Publication of EP2871254B1 publication Critical patent/EP2871254B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1216—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties characterised by the working steps
    • C21D8/1222—Hot rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B3/02—Rolling special iron alloys, e.g. stainless steel
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0263—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1244—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties characterised by the heat treatment
    • C21D8/1261—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties characterised by the heat treatment following hot rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/002—Bainite
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/008—Martensite

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Heat Treatment Of Steel (AREA)
EP13837646.2A 2012-09-13 2013-09-11 Hot-rolled steel sheet and method for manufacturing same Active EP2871254B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012201266 2012-09-13
PCT/JP2013/005388 WO2014041802A1 (en) 2012-09-13 2013-09-11 Hot-rolled steel sheet and method for manufacturing same

Publications (3)

Publication Number Publication Date
EP2871254A1 EP2871254A1 (en) 2015-05-13
EP2871254A4 true EP2871254A4 (en) 2015-11-18
EP2871254B1 EP2871254B1 (en) 2020-06-24

Family

ID=50277943

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13837646.2A Active EP2871254B1 (en) 2012-09-13 2013-09-11 Hot-rolled steel sheet and method for manufacturing same

Country Status (7)

Country Link
US (1) US20150232970A1 (en)
EP (1) EP2871254B1 (en)
JP (1) JP5605527B2 (en)
KR (1) KR101702794B1 (en)
CN (1) CN104619876B (en)
IN (1) IN2015DN00772A (en)
WO (1) WO2014041802A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108495945A (en) * 2016-01-27 2018-09-04 杰富意钢铁株式会社 Electric-resistance-welded steel pipe high tensile hot rolled steel sheet and its manufacturing method

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104619877B (en) 2012-09-13 2017-06-09 杰富意钢铁株式会社 Hot-rolled steel sheet and manufacturing method thereof
CN108350542B (en) * 2015-09-22 2020-03-10 塔塔钢铁艾默伊登有限责任公司 Hot-rolled high-strength roll-formable steel sheet having excellent stretch flange formability and method of making the same
KR101830437B1 (en) * 2016-04-25 2018-02-20 현대자동차주식회사 High toughness, heat-treated steel pipe having a three-layer structure and manufacturing method thereof
JP6624103B2 (en) * 2017-02-06 2019-12-25 Ｊｆｅスチール株式会社 High strength hot rolled steel sheet and method for producing the same
US11603571B2 (en) * 2017-02-17 2023-03-14 Jfe Steel Corporation High-strength hot-rolled steel sheet and method for producing the same
US20200071801A1 (en) * 2017-04-28 2020-03-05 Nippon Steel Corporation High strength steel sheet and method of producing same
KR101999015B1 (en) 2017-12-24 2019-07-10 주식회사 포스코 Steel for structure having superior resistibility of brittle crack arrestability and manufacturing method thereof
KR102031450B1 (en) * 2017-12-24 2019-10-11 주식회사 포스코 High strength steel sheet and manufacturing method for the same
KR102200224B1 (en) * 2018-12-19 2021-01-08 주식회사 포스코 Steel for a structure having excellent resistance to brittle fracture and manufacturing method for the same
JP6690787B1 (en) * 2019-03-29 2020-04-28 Ｊｆｅスチール株式会社 ERW steel pipe, its manufacturing method, and steel pipe pile
KR102691589B1 (en) * 2019-11-27 2024-08-05 제이에프이 스틸 가부시키가이샤 Steel plate and method for producing same
WO2021123877A1 (en) 2019-12-17 2021-06-24 Arcelormittal Hot rolled steel sheet and method of manufacturing thereof
JP7373576B2 (en) 2019-12-18 2023-11-02 ポスコ カンパニー リミテッド High-strength hot-rolled steel sheet with excellent punchability and material uniformity and its manufacturing method
KR102391651B1 (en) 2020-09-22 2022-04-29 주식회사 포스코 Hot rolled steel sheet having excellent crashworthness, and method for manufacturing the same
WO2022269742A1 (en) * 2021-06-22 2022-12-29 日本製鉄株式会社 Hot-rolled steel sheet and method for manufacturing same
CN114107612B (en) * 2021-11-30 2023-04-18 马鞍山钢铁股份有限公司 Tempering heat treatment design method for H-shaped steel, hot-rolled H-shaped steel for anti-seismic and fireproof building structure and tempering heat treatment method for hot-rolled H-shaped steel
AU2023226269B9 (en) * 2022-02-24 2025-10-16 Jfe Steel Corporation Steel plate and method of producing same
KR20240098492A (en) * 2022-12-21 2024-06-28 주식회사 포스코 High strenth hot-rolled steel sheet having excellent formability and method for manufacturing the same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5830293A (en) * 1996-03-30 1998-11-03 Sms Schloemann-Siemag Aktiengesellschaft Method of cooling steel sections which are hot from rolling
US20110073222A1 (en) * 2007-10-04 2011-03-31 Ingemar Strandell Heat-Treatment Process for a Steel
US20110284137A1 (en) * 2009-01-30 2011-11-24 Jfe Steel Corporation Thick high-tensile-strength hot-rolled steel sheet having excellent low-temperature toughness and manufacturing method thereof
EP2392681A1 (en) * 2009-01-30 2011-12-07 JFE Steel Corporation Heavy gauge, high tensile strength, hot rolled steel sheet with excellent hic resistance and manufacturing method therefor

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JP2510187B2 (en) 1987-03-17 1996-06-26 川崎製鉄株式会社 Method for producing hot-rolled steel sheet for low-yield ratio high-strength line pipe with excellent low temperature toughness
JPH10176239A (en) 1996-10-17 1998-06-30 Kobe Steel Ltd Hot-rolled steel sheet for high-strength low-yield-ratio pipe and method for producing the same
JP5011773B2 (en) 2005-03-24 2012-08-29 Ｊｆｅスチール株式会社 Manufacturing method of low yield ratio ERW steel pipe with excellent low temperature toughness
JP5223379B2 (en) * 2007-03-08 2013-06-26 新日鐵住金株式会社 High strength hot rolled steel sheet for spiral pipe with excellent low temperature toughness and method for producing the same
WO2009014238A1 (en) * 2007-07-23 2009-01-29 Nippon Steel Corporation Steel pipes excellent in deformation characteristics and process for manufacturing the same
JP5162382B2 (en) 2008-09-03 2013-03-13 株式会社神戸製鋼所 Low yield ratio high toughness steel plate
JP5499731B2 (en) 2009-01-30 2014-05-21 Ｊｆｅスチール株式会社 Thick high-tensile hot-rolled steel sheet with excellent HIC resistance and method for producing the same
JP5679114B2 (en) * 2011-02-24 2015-03-04 Ｊｆｅスチール株式会社 Low yield ratio high strength hot rolled steel sheet with excellent low temperature toughness and method for producing the same
JP6006477B2 (en) * 2011-06-24 2016-10-12 株式会社神戸製鋼所 Method for producing high-strength steel sheet excellent in balance between low-temperature toughness and strength, and control method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5830293A (en) * 1996-03-30 1998-11-03 Sms Schloemann-Siemag Aktiengesellschaft Method of cooling steel sections which are hot from rolling
US20110073222A1 (en) * 2007-10-04 2011-03-31 Ingemar Strandell Heat-Treatment Process for a Steel
US20110284137A1 (en) * 2009-01-30 2011-11-24 Jfe Steel Corporation Thick high-tensile-strength hot-rolled steel sheet having excellent low-temperature toughness and manufacturing method thereof
EP2392681A1 (en) * 2009-01-30 2011-12-07 JFE Steel Corporation Heavy gauge, high tensile strength, hot rolled steel sheet with excellent hic resistance and manufacturing method therefor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2014041802A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108495945A (en) * 2016-01-27 2018-09-04 杰富意钢铁株式会社 Electric-resistance-welded steel pipe high tensile hot rolled steel sheet and its manufacturing method

Also Published As

Publication number Publication date
JP5605527B2 (en) 2014-10-15
KR20150038747A (en) 2015-04-08
JPWO2014041802A1 (en) 2016-08-12
WO2014041802A1 (en) 2014-03-20
EP2871254A1 (en) 2015-05-13
EP2871254B1 (en) 2020-06-24
BR112015005419A2 (en) 2017-07-04
KR101702794B1 (en) 2017-02-03
US20150232970A1 (en) 2015-08-20
CN104619876A (en) 2015-05-13
IN2015DN00772A (en) 2015-07-03
CN104619876B (en) 2016-12-21

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