JP2014511944A - フェライト・オーステナイト系ステンレス鋼の製造および利用方法 - Google Patents
フェライト・オーステナイト系ステンレス鋼の製造および利用方法 Download PDFInfo
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 229910001566 austenite Inorganic materials 0.000 claims abstract description 70
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- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 31
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- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical compound Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 description 1
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- 238000001887 electron backscatter diffraction Methods 0.000 description 1
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- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
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- 239000011573 trace mineral Substances 0.000 description 1
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
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- C21—METALLURGY OF IRON
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Abstract
【選択図】図1
Description
Claims (20)
- 良好な成形性、良好な溶接性および高い伸び性を有するフェライト・オーステナイト系ステンレス鋼の製造方法であって、溶接時の鋭敏化を回避するための低炭素含有量が成形性を維持するための高窒素含有量で補償されており、重量%で0.17〜0.295の範囲内にある炭素および窒素の合計量C+Nを含有するステンレス鋼を熱処理して、該ステンレス鋼の微細構造が熱処理条件によって45〜75%のオーステナイトを含有し、残留する微細構造がフェライトであるようにし、該ステンレス鋼の測定されたMd30温度を0℃と50℃の間に調整して変態誘起塑性(TRIP)を利用し、該ステンレス鋼の成形性を改善することを特徴とするフェライト・オーステナイト系ステンレス鋼の製造方法。
- 請求項1に記載の方法において、前記ステンレス鋼のMd30温度は、該ステンレス鋼にひずみを与えて変態マルテンサイトの比率を計測することにより測定することを特徴とする方法。
- 請求項1または2に記載の方法において、前記熱処理を溶体化焼鈍で行うことを特徴とする方法。
- 請求項1または2に記載の方法において、前記熱処理を高周波誘導焼鈍で行うことを特徴とする方法。
- 請求項1または2に記載の方法において、前記熱処理を局部焼鈍で行うことを特徴とする方法。
- 前記請求項のいずれかに記載の方法において、前記焼鈍は900〜1200℃、好ましくは1000〜1150℃の温度範囲で行うことを特徴とする方法。
- 前記請求項のいずれかに記載の方法において、測定されたMd30温度を10℃と45℃の間、好ましくは20℃と35℃の間に調整することを特徴とする方法。
- 前記請求項のいずれかに記載の方法において、前記ステンレス鋼は、0.2〜0.29重量%の合計量C+Nを含有することを特徴とする方法。
- 前記請求項のいずれかに記載の方法において、前記ステンレス鋼は、0.23〜0.27重量%の合計量C+Nを含有することを特徴とする方法。
- 前記請求項のいずれかに記載の方法において、前記ステンレス鋼は、重量%で、0.05%未満のC、0.2〜0.7%のSi、2〜5%のMn、19〜20.5%のCr、0.8〜1.5%のNi、0.6%未満のMo、1%未満のCu、0.16〜0.26%のN、残量となるFeおよび不可避不純物を含有することを特徴とする方法。
- 請求項10に記載の方法において、前記ステンレス鋼は、必要に応じて1種類以上の添加元素である0〜0.5重量%のW、0〜0.2重量%のNb、0〜0.1重量%のTi、0〜0.2重量%のV、0〜0.5重量%のCo、0〜50ppmのBおよび0〜0.04重量%のAlを含有することを特徴とする方法。
- 請求項10または11に記載の方法において、前記ステンレス鋼は、不可避不純物として、0.010重量%未満、好ましくは0.005重量%未満のSと、0.040重量%未満のPを含有し、合計量(S+P)を0.04重量%未満とし、総酸素含有量を100ppm未満とすることを特徴とする方法。
- 請求項10ないし12のいずれかに記載の方法において、前記ステンレス鋼は、重量%で0.035%未満のCを含有することを特徴とする方法。
- 請求項10ないし13のいずれかに記載の方法において、前記ステンレス鋼は、重量%で1.0〜1.35%のNiを含有することを特徴とする方法。
- 請求項10ないし13のいずれかに記載の方法において、前記ステンレス鋼は、重量%で0.18〜0.24%のNを含有することを特徴とする方法。
- 良好な成形性、良好な溶接性および高い伸び性を有するフェライト・オーステナイト系ステンレス鋼を解決用途に利用する方法であって、溶接時の鋭敏化を回避するための低炭素含有量が成形性を維持するための高窒素含有量で補償されており、重量%で0.17〜0.295の範囲内にある炭素および窒素の合計量C+Nを含有するフェライト・オーステナイト系ステンレス鋼を、測定されたMd30温度およびオーステナイト比率に基づいて熱処理し、所望の解決用途に向けて変態誘起塑性(TRIP)効果を調整することを特徴とするフェライト・オーステナイト系ステンレス鋼の利用方法。
- 請求項16に記載の方法において、前記熱処理を溶体化焼鈍で行うことを特徴とする方法。
- 請求項16に記載の方法において、前記熱処理を高周波誘導焼鈍で行うことを特徴とする方法。
- 請求項16に記載の方法において、前記熱処理を局部焼鈍で行うことを特徴とする方法。
- 前記請求項のいずれかに記載の方法において、前記ステンレス鋼を、鋳物、インゴット、スラブ、ブルーム、ビレット、プレート、シート、細片、コイル、棒状体、ロッド、ワイヤ、種々の輪郭および形状を有する製品、継ぎ目なしや溶接された管および/またはパイプ、金属粉体、成形した形状物および金型として生産することを特徴とする方法。
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FI20110375A FI123558B (fi) | 2011-04-18 | 2011-10-28 | Menetelmä ferriittis-austeniittisen ruostumattoman teräksen valmistamiseksi ja hyödyntämiseksi |
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PCT/FI2012/050379 WO2012143610A1 (en) | 2011-04-18 | 2012-04-18 | Method for manufacturing and utilizing ferritic-austenitic stainless steel |
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EA201391330A1 (ru) | 2014-03-31 |
FI20110375L (fi) | 2012-10-19 |
TWI609971B (zh) | 2018-01-01 |
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CA2832921A1 (en) | 2012-10-26 |
ZA201307742B (en) | 2015-01-28 |
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AU2012246194A1 (en) | 2013-10-31 |
ES2713998T3 (es) | 2019-05-24 |
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CN103547695A (zh) | 2014-01-29 |
FI20110375A0 (fi) | 2011-10-28 |
EP2699704A4 (en) | 2015-03-11 |
EP2699704A1 (en) | 2014-02-26 |
WO2012143610A1 (en) | 2012-10-26 |
KR20130140180A (ko) | 2013-12-23 |
KR20120132691A (ko) | 2012-12-07 |
BR112013026911B1 (pt) | 2023-09-26 |
EP2699704B1 (en) | 2018-11-28 |
MX2013012101A (es) | 2014-05-27 |
CA2832921C (en) | 2020-03-31 |
FI123558B (fi) | 2013-07-15 |
AU2012246194B2 (en) | 2017-10-05 |
BR112013026911A2 (pt) | 2018-01-30 |
MY185071A (en) | 2021-04-30 |
US10407746B2 (en) | 2019-09-10 |
US20140041766A1 (en) | 2014-02-13 |
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