JP2022507340A - 高強度非磁性オーステナイト系ステンレス鋼及びその製造方法 - Google Patents
高強度非磁性オーステナイト系ステンレス鋼及びその製造方法 Download PDFInfo
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- 229910000963 austenitic stainless steel Inorganic materials 0.000 title claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 29
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 23
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 17
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 16
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 16
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 15
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 14
- 239000012535 impurity Substances 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 41
- 239000010959 steel Substances 0.000 claims description 41
- 230000035699 permeability Effects 0.000 claims description 39
- 239000010960 cold rolled steel Substances 0.000 claims description 21
- 229910052799 carbon Inorganic materials 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 15
- 238000000137 annealing Methods 0.000 claims description 8
- 238000005097 cold rolling Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000005098 hot rolling Methods 0.000 claims description 7
- 230000009467 reduction Effects 0.000 claims description 7
- 239000002244 precipitate Substances 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims 1
- 229910001566 austenite Inorganic materials 0.000 abstract description 16
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 13
- 239000010935 stainless steel Substances 0.000 abstract description 12
- 238000010586 diagram Methods 0.000 abstract 1
- 229910000859 α-Fe Inorganic materials 0.000 description 29
- 229910000734 martensite Inorganic materials 0.000 description 19
- 230000007797 corrosion Effects 0.000 description 12
- 238000005260 corrosion Methods 0.000 description 12
- 230000015572 biosynthetic process Effects 0.000 description 11
- 230000005389 magnetism Effects 0.000 description 11
- 238000007711 solidification Methods 0.000 description 11
- 230000008023 solidification Effects 0.000 description 11
- 229910045601 alloy Inorganic materials 0.000 description 7
- 239000000956 alloy Substances 0.000 description 7
- 230000000087 stabilizing effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 238000005482 strain hardening Methods 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- 238000005275 alloying Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000008570 general process Effects 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000000879 optical micrograph Methods 0.000 description 1
- 230000003389 potentiating effect Effects 0.000 description 1
- 238000004881 precipitation hardening Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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Abstract
Description
Claims (10)
- 重量%で、C:0.02~0.12%、Si:1.2%以下、Mn:0.5~2.0%、Cr:17.0~22.0%、Ni:11.0~15.0%、Mo:3.0%以下、N:0.25%以下、残りはFe及び不可避な不純物からなり、
下記式(1)を満足することを特徴とする高強度非磁性オーステナイト系ステンレス熱延焼鈍鋼板。
(1)[{Cr+Mo+1.5×Si+18}/{Ni+30×(C+N)+0.5×Mn+36}+0.262]×161-161-log(冷却速度)<0
(ここで、Cr、Mo、Si、Ni、C、N、Mnは、各元素の含量(重量%)を意味し、冷却速度は、溶鋼から凝固する鋳片の冷却速度(℃/s)を意味する。) - 透磁率(μ)1.01以下であることを特徴とする請求項1に記載の高強度非磁性オーステナイト系ステンレス熱延焼鈍鋼板。
- 重量%で、C+N:0.25%以上を満足することを特徴とする請求項1に記載の高強度非磁性オーステナイト系ステンレス熱延焼鈍鋼板。
- 重量%で、C:0.02~0.12%、Si:1.2%以下、Mn:0.5~2.0%、Cr:17.0~22.0%、Ni:11.0~15.0%、Mo:3.0%以下、N:0.25%以下、残りはFe及び不可避な不純物からなり、
C+N:0.25%以上を満足し、
下記式(1)及び(2)を満足することを特徴とする高強度非磁性オーステナイト系ステンレス冷延鋼板。
(1)[{Cr+Mo+1.5×Si+18}/{Ni+30×(C+N)+0.5×Mn+36}+0.262]×161-161-log(冷却速度)<0
(2)551-462×(C+N)-9.2×Si-8.1×Mn-13.7×Cr-29×Ni-18.5×Mo≦-200
(ここで、Cr、Mo、Si、Ni、C、N、Mnは、各元素の含量(重量%)を意味し、冷却速度は、溶鋼から凝固する鋳片の冷却速度(℃/s)を意味する。) - 前記冷延鋼板は、圧下率80%以上の冷間圧延材であり、
透磁率(μ)1.02以下であることを特徴とする請求項4に記載の高強度非磁性オーステナイト系ステンレス冷延鋼板。 - 前記冷延鋼板は、圧下率80%以上の冷間圧延材であり、
降伏強度1,280MPa以上であることを特徴とする請求項4に記載の高強度非磁性オーステナイト系ステンレス冷延鋼板。 - 平均直径20~200nmの炭窒化物の析出物数が40個/μm2以上であることを特徴とする請求項4に記載の高強度非磁性オーステナイト系ステンレス冷延鋼板。
- 重量%で、C:0.02~0.12%、Si:1.2%以下、Mn:0.5~2.0%、Cr:17.0~22.0%、Ni:11.0~15.0%、Mo:3.0%以下、N:0.25%以下、C+N:0.25%以上、残りはFe及び不可避な不純物からなるスラブを熱間圧延及び焼鈍熱処理して熱延焼鈍鋼板を製造するステップ、及び前記熱延焼鈍鋼板を80%以上の圧下率で冷間圧延して冷延鋼板を製造するステップ、を含み、
前記スラブは、下記式(1)及び(2)を満足し、
前記冷延鋼板の透磁率(μ)は、1.02以下であることを特徴とする高強度非磁性オーステナイト系ステンレス鋼の製造方法。
(1)[{Cr+Mo+1.5×Si+18}/{Ni+30×(C+N)+0.5×Mn+36}+0.262]×161-161-log(冷却速度)<0
(2)551-462×(C+N)-9.2×Si-8.1×Mn-13.7×Cr-29×Ni-18.5×Mo≦-200
(ここで、Cr、Mo、Si、Ni、C、N、Mnは、各元素の含量(重量%)を意味し、冷却速度は、溶鋼から凝固する鋳片の冷却速度(℃/s)を意味する。) - 前記熱延焼鈍鋼板の透磁率(μ)は、1.01以下であり、
前記冷間圧延による透磁率の増加分が0.01以下であることを特徴とする請求項8に記載の高強度非磁性オーステナイト系ステンレス鋼の製造方法。 - 前記冷延鋼板は、降伏強度が1,280MPa以上であり、
平均直径20~200nmの炭窒化物の析出物数が40個/μm2以上であることを特徴とする請求項8に記載の高強度非磁性オーステナイト系ステンレス鋼の製造方法。
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KR1020180139428A KR102173303B1 (ko) | 2018-11-13 | 2018-11-13 | 고강도 비자성 오스테나이트계 스테인리스강 및 그 제조방법 |
KR10-2018-0139428 | 2018-11-13 | ||
PCT/KR2019/014536 WO2020101226A1 (ko) | 2018-11-13 | 2019-10-31 | 고강도 비자성 오스테나이트계 스테인리스강 및 그 제조방법 |
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EP4050119A4 (en) * | 2020-12-30 | 2022-08-31 | Posco | NON-MAGNETIC AUSTENITIC STAINLESS STEEL |
CN113492153B (zh) * | 2021-07-16 | 2023-01-31 | 山西太钢不锈钢股份有限公司 | 一种奥氏体不锈钢的轧制方法和电子元件用奥氏体不锈钢 |
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EP3865600A4 (en) | 2022-03-02 |
KR20200055605A (ko) | 2020-05-21 |
CN113015818A (zh) | 2021-06-22 |
US20220018006A1 (en) | 2022-01-20 |
CN113015818B (zh) | 2023-07-04 |
JP7329594B2 (ja) | 2023-08-18 |
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