JP2020537716A - 低降伏比・超高強度コイルドチュービング用鋼及びその製造方法 - Google Patents
低降伏比・超高強度コイルドチュービング用鋼及びその製造方法 Download PDFInfo
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- 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
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
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Abstract
Description
1)上記化学成分を、電気炉又は転炉による製錬、炉外精錬、連続鋳造を行い、前記炉外精錬においてLF脱硫+5min以上のRH真空脱気を行い、前記連続鋳造過程において過熱度を15〜30℃に制御し、溶鋼滞留時間(キリング時間)を8〜17minとする製錬・鋳造工程、
2)加熱温度が1200〜1260℃、仕上げ圧延温度が840〜920℃、巻取り温度が450〜550℃である熱間圧延工程、及び
3)巻出し温度が70℃以下、酸洗温度が65〜80℃、酸洗時間が45〜100sである酸洗・オイル塗布工程、を含む製造方法。
Claims (6)
- 化学成分として、質量%にて、C:0.05〜0.16%、Si:0.1〜0.9%、Mn:1.25〜2.5%、P≦0.015%、S≦0.005%、Cr:0.51〜1.30%、Nb:0.005〜0.019%、V:0.010〜0.079%、Ti:0.01〜0.03%、Mo:0.10〜0.55%、Cu:0.31〜0.60%、Ni:0.31〜0.60%、Ca:0.0010〜0.0040%、Al:0.01〜0.05%、N≦0.008%を含有し、残部がFe及び不可避的不純物元素からなる、低降伏比・超高強度コイルドチュービング用鋼。
- 前記低降伏比・超高強度コイルドチュービング用鋼のミクロ組織が、島状マルテンサイト+ベイナイト+フェライトの多相組織であることを特徴とする、請求項1に記載の低降伏比・超高強度コイルドチュービング用鋼。
- 前記低降伏比・超高強度コイルドチュービング用鋼の降伏強度Rp0.2が620MPa以上、引張強度Rmが750MPa以上、伸びA50が11%以上、降伏比Rp0.2/Rmが0.83以下であることを特徴とする、請求項1又は2に記載の低降伏比・超高強度コイルドチュービング用鋼。
- 1)請求項1に記載の化学成分を、電気炉又は転炉による製錬、炉外精錬、連続鋳造を行い、前記炉外精錬においてLF脱硫+5min以上のRH真空脱気を行い、前記連続鋳造過程において過熱度を15〜30℃に制御し、溶鋼滞留時間(キリング時間)を8〜17minとする製錬・鋳造工程、
2)加熱温度が1200〜1260℃、仕上げ圧延温度が840〜920℃、巻取り温度が450〜550℃である熱間圧延工程、及び
3)巻出し温度が70℃以下、酸洗温度が65〜80℃、酸洗時間が45〜100sである酸洗・オイル塗布工程、
を含む、請求項1〜3のいずれか1項に記載の低降伏比・超高強度コイルドチュービング用鋼の製造方法。 - 前記低降伏比・超高強度コイルドチュービング用鋼のミクロ組織が、島状マルテンサイト+ベイナイト+フェライトの多相組織であることを特徴とする、請求項4に記載の低降伏比・超高強度コイルドチュービング用鋼の製造方法。
- 前記低降伏比・超高強度コイルドチュービング用鋼の降伏強度Rp0.2が620MPa以上、引張強度Rmが750MPa以上、伸びA50が11%以上、降伏比Rp0.2/Rmが0.83以下であることを特徴とする、請求項4又は5に記載の低降伏比・超高強度コイルドチュービング用鋼の製造方法。
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PCT/CN2018/111845 WO2019080893A1 (zh) | 2017-10-27 | 2018-10-25 | 一种低屈强比超高强度连续油管用钢及其制造方法 |
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CN110541117B (zh) * | 2019-10-16 | 2020-12-15 | 宝武集团鄂城钢铁有限公司 | 一种低预热温度焊接的620MPa级高性能桥梁钢及其制备方法 |
CN113637925B (zh) * | 2020-04-27 | 2022-07-19 | 宝山钢铁股份有限公司 | 一种调质型连续油管用钢、热轧钢带、钢管及其制造方法 |
US11802327B1 (en) * | 2020-10-02 | 2023-10-31 | Big River Steel, LLC | Ultra-high strength hot-rolled steel with toughness and method of making same |
CN112538594A (zh) * | 2020-11-10 | 2021-03-23 | 江苏省沙钢钢铁研究院有限公司 | 一种屈服强度500MPa级低成本热轧卷板及其制备方法 |
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JP2003247047A (ja) * | 2002-02-25 | 2003-09-05 | Sumitomo Metal Ind Ltd | 電縫鋼管およびその製造方法 |
JP2007277585A (ja) * | 2005-03-30 | 2007-10-25 | Kobe Steel Ltd | 化成処理性に優れた高強度熱延鋼板 |
JP2010116611A (ja) * | 2008-11-13 | 2010-05-27 | Kobe Steel Ltd | 大入熱時でのhaz靱性に優れた低硫厚板鋼板の製造方法 |
JP2012017522A (ja) * | 2010-06-08 | 2012-01-26 | Sumitomo Metal Ind Ltd | ラインパイプ用鋼材 |
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 |
Cited By (1)
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RU2786281C1 (ru) * | 2022-02-10 | 2022-12-19 | Публичное акционерное общество "Северсталь" (ПАО "Северсталь") | Способ производства стального проката для изготовления гибких труб для колтюбинга (варианты) |
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US20200255917A1 (en) | 2020-08-13 |
RU2744590C1 (ru) | 2021-03-11 |
WO2019080893A1 (zh) | 2019-05-02 |
JP7134230B2 (ja) | 2022-09-09 |
CA3078406C (en) | 2021-09-14 |
CN109722611A (zh) | 2019-05-07 |
CA3078406A1 (en) | 2019-05-02 |
US11396680B2 (en) | 2022-07-26 |
CN109722611B (zh) | 2020-08-25 |
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