WO2020202334A1 - 電縫鋼管およびその製造方法、並びに鋼管杭 - Google Patents

電縫鋼管およびその製造方法、並びに鋼管杭 Download PDF

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Publication number
WO2020202334A1
WO2020202334A1 PCT/JP2019/014232 JP2019014232W WO2020202334A1 WO 2020202334 A1 WO2020202334 A1 WO 2020202334A1 JP 2019014232 W JP2019014232 W JP 2019014232W WO 2020202334 A1 WO2020202334 A1 WO 2020202334A1
Authority
WO
WIPO (PCT)
Prior art keywords
steel pipe
less
steel
bainite
hot
Prior art date
Application number
PCT/JP2019/014232
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
井手　信介
昌士 松本
晃英 松本
Original Assignee
Ｊｆｅスチール株式会社
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スチール株式会社 filed Critical Ｊｆｅスチール株式会社
Priority to JP2019548355A priority Critical patent/JP6690788B1/ja
Priority to PCT/JP2019/014232 priority patent/WO2020202334A1/ja
Priority to KR1020217031054A priority patent/KR102551615B1/ko
Priority to CN201980094635.3A priority patent/CN113614268B/zh
Priority to TW109108314A priority patent/TWI762881B/zh
Publication of WO2020202334A1 publication Critical patent/WO2020202334A1/ja

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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
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/14—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling without mandrel, e.g. stretch-reducing mills
    • 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
    • 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 by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties 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 by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—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 by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236—Cold 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
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • 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
    • C22C38/02—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
    • C22C38/06—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
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing 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
    • C22C38/42—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
    • C22C38/58—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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/002—Bainite
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • the present invention has been made in view of the above-mentioned problems, and is an electrosewn steel pipe having an optimum yield ratio and high buckling resistance, and further having high strength and high toughness, a method for manufacturing the same, and a steel pipe pile.
  • the purpose is to provide.
  • C 0.12 to 0.20%
  • C is an element that increases the strength of steel pipes (electrically sewn steel pipes) by solid solution strengthening and is involved in the formation of steel structures such as bainite. Further, C is an element effective for optimizing the yield ratio.
  • a steel pipe having a relatively large plate thickness (for example, a steel pipe having a plate thickness of 16 mm or more) has a large difference between the outer diameter and the inner diameter, so that the degree of processing when manufacturing the steel pipe is large and the yield ratio tends to increase. Therefore, it is necessary to contain a large amount of C. Therefore, in order to obtain the above-mentioned effect, the content of C of 0.12% or more is required.
  • the rest is Fe and unavoidable impurities. As long as the effect of the present invention is not impaired, the content of O: 0.0050% or less can be allowed as an unavoidable impurity.
  • Cu 0.01-0.50%
  • Cu is an element that increases the strength of steel pipes by solid solution strengthening, and can be contained as needed. In order to obtain such an effect, it is preferable to contain 0.01% or more of Cu. On the other hand, if Cu is contained in excess of 0.50%, the toughness may be lowered, so the content is preferably 0.50% or less. Therefore, when Cu is contained, it is preferable that Cu is 0.01 to 0.50%. Cu is more preferably 0.02% or more, and even more preferably 0.03% or more. Cu is more preferably 0.45% or less, and even more preferably 0.40% or less.
  • Total rolling reduction at 930 ° C or lower in rough rolling and finish rolling 65% or more
  • austenite in the hot rolling process by refining austenite in the hot rolling process, bainite and the residual structure generated in the subsequent cooling process and winding process are produced. It is possible to obtain a hot-rolled steel sheet that is miniaturized and has the strength and toughness desired in the present invention and is suitable as a material for bainite pipes.
  • the total reduction rate in the temperature range up to the finish rolling end temperature of 930 ° C. or lower is set to 65% or more.
  • the total rolling reduction rate refers to the total rolling reduction rate of each rolling path in the temperature range up to the finish rolling end temperature of 930 ° C. or lower.
  • hot rolling when hot rolling a steel material, hot rolling may be performed in which the total rolling reduction ratio up to the finish rolling end temperature of 930 ° C. or lower is 65% or more in both the rough rolling and the finish rolling described above. Hot rolling may be performed in which the total rolling reduction up to the finish rolling end temperature of 930 ° C. or lower is 65% or more only by finish rolling. In the latter case, if the total rolling reduction to the finish rolling end temperature cannot be 65% or more only by finish rolling, the slab is cooled during rough rolling to bring the temperature to 930 ° C or less. The total reduction rate up to the finish rolling end temperature of 930 ° C. or lower in both rough rolling and finish rolling may be 65% or more.
  • Molten steel having the composition shown in Table 1 was melted in a converter and made into a slab (steel material: wall thickness 250 mm) by a continuous casting method.
  • the obtained slab was subjected to a hot rolling step, a cooling step, a winding step, and a cold roll forming step under the manufacturing conditions shown in Tables 2-1 and 2-2, and then subjected to a hot rolling step, a cooling step, and a cold roll forming step.
  • An electro-sewn steel pipe having an outer diameter and a plate thickness shown in the above was manufactured. Further, in the cold roll forming step, the butt portion of the open pipe was welded by electric stitching.

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)
  • Heat Treatment Of Steel (AREA)
PCT/JP2019/014232 2019-03-29 2019-03-29 電縫鋼管およびその製造方法、並びに鋼管杭 WO2020202334A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2019548355A JP6690788B1 (ja) 2019-03-29 2019-03-29 電縫鋼管およびその製造方法、並びに鋼管杭
PCT/JP2019/014232 WO2020202334A1 (ja) 2019-03-29 2019-03-29 電縫鋼管およびその製造方法、並びに鋼管杭
KR1020217031054A KR102551615B1 (ko) 2019-03-29 2019-03-29 전봉 강관 및 그의 제조 방법, 그리고 강관 말뚝
CN201980094635.3A CN113614268B (zh) 2019-03-29 2019-03-29 电阻焊钢管及其制造方法、以及钢管桩
TW109108314A TWI762881B (zh) 2019-03-29 2020-03-13 電焊鋼管及其製造方法以及鋼管樁

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2019/014232 WO2020202334A1 (ja) 2019-03-29 2019-03-29 電縫鋼管およびその製造方法、並びに鋼管杭

Publications (1)

Publication Number Publication Date
WO2020202334A1 true WO2020202334A1 (ja) 2020-10-08

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PCT/JP2019/014232 WO2020202334A1 (ja) 2019-03-29 2019-03-29 電縫鋼管およびその製造方法、並びに鋼管杭

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Country Link
JP (1) JP6690788B1 (zh)
KR (1) KR102551615B1 (zh)
CN (1) CN113614268B (zh)
TW (1) TWI762881B (zh)
WO (1) WO2020202334A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116018417A (zh) * 2020-10-22 2023-04-25 日本制铁株式会社 机械结构部件用电焊钢管及其制造方法
JP7346770B1 (ja) * 2022-08-05 2023-09-19 Ｊｆｅシビル株式会社 人工地盤構造物

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021085036A1 (ja) * 2019-10-31 2021-05-06 Ｊｆｅスチール株式会社 電縫鋼管およびその製造方法ならびにラインパイプおよび建築構造物
WO2022075027A1 (ja) * 2020-10-05 2022-04-14 Ｊｆｅスチール株式会社 電縫鋼管およびその製造方法
TWI768987B (zh) * 2021-06-28 2022-06-21 中國鋼鐵股份有限公司 具低溫韌性之鋼材與其製作方法

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WO2017130875A1 (ja) * 2016-01-27 2017-08-03 Ｊｆｅスチール株式会社 電縫鋼管用高強度熱延鋼板およびその製造方法
WO2017221690A1 (ja) * 2016-06-22 2017-12-28 Ｊｆｅスチール株式会社 厚肉高強度ラインパイプ用熱延鋼板、ならびに、厚肉高強度ラインパイプ用溶接鋼管およびその製造方法
WO2018139095A1 (ja) * 2017-01-25 2018-08-02 Ｊｆｅスチール株式会社 コイルドチュービング用熱延鋼板

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JPH116032A (ja) 1997-06-18 1999-01-12 Nkk Corp 耐局部座屈性に優れた耐震性溶接鋼管およびその製造方 法
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WO2016103623A1 (ja) * 2014-12-25 2016-06-30 Ｊｆｅスチール株式会社 深井戸向けコンダクターケーシング用高強度厚肉電縫鋼管およびその製造方法ならびに深井戸向け高強度厚肉コンダクターケーシング
WO2017130875A1 (ja) * 2016-01-27 2017-08-03 Ｊｆｅスチール株式会社 電縫鋼管用高強度熱延鋼板およびその製造方法
WO2017221690A1 (ja) * 2016-06-22 2017-12-28 Ｊｆｅスチール株式会社 厚肉高強度ラインパイプ用熱延鋼板、ならびに、厚肉高強度ラインパイプ用溶接鋼管およびその製造方法
WO2018139095A1 (ja) * 2017-01-25 2018-08-02 Ｊｆｅスチール株式会社 コイルドチュービング用熱延鋼板

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116018417A (zh) * 2020-10-22 2023-04-25 日本制铁株式会社 机械结构部件用电焊钢管及其制造方法
JP7346770B1 (ja) * 2022-08-05 2023-09-19 Ｊｆｅシビル株式会社 人工地盤構造物
WO2024029070A1 (ja) * 2022-08-05 2024-02-08 Ｊｆｅシビル株式会社 人工地盤構造物
JP7430842B1 (ja) 2022-08-05 2024-02-13 Ｊｆｅシビル株式会社 人工地盤構造物

Also Published As

Publication number Publication date
TW202039884A (zh) 2020-11-01
JPWO2020202334A1 (ja) 2021-04-30
CN113614268B (zh) 2022-12-02
TWI762881B (zh) 2022-05-01
CN113614268A (zh) 2021-11-05
KR102551615B1 (ko) 2023-07-05
JP6690788B1 (ja) 2020-04-28
KR20210132698A (ko) 2021-11-04

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