JP2018500460A - 抗菌性に優れた高硬度マルテンサイト系ステンレス鋼及びその製造方法 - Google Patents
抗菌性に優れた高硬度マルテンサイト系ステンレス鋼及びその製造方法 Download PDFInfo
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- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 73
- 229910001105 martensitic stainless steel Inorganic materials 0.000 title claims abstract description 52
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 claims abstract description 48
- 229910003470 tongbaite Inorganic materials 0.000 claims abstract description 48
- 230000007797 corrosion Effects 0.000 claims abstract description 33
- 238000005260 corrosion Methods 0.000 claims abstract description 33
- 238000000137 annealing Methods 0.000 claims abstract description 29
- 239000011651 chromium Substances 0.000 claims abstract description 20
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 16
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 12
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 9
- 229910052802 copper Inorganic materials 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 6
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 118
- 230000008569 process Effects 0.000 claims description 106
- 238000002791 soaking Methods 0.000 claims description 75
- 238000010438 heat treatment Methods 0.000 claims description 48
- 229910000831 Steel Inorganic materials 0.000 claims description 43
- 239000010959 steel Substances 0.000 claims description 43
- 239000002244 precipitate Substances 0.000 claims description 23
- 238000001816 cooling Methods 0.000 claims description 17
- 229910001220 stainless steel Inorganic materials 0.000 claims description 13
- 239000010935 stainless steel Substances 0.000 claims description 13
- 230000001965 increasing effect Effects 0.000 claims description 10
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- 229910000734 martensite Inorganic materials 0.000 claims description 9
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- 241000894006 Bacteria Species 0.000 claims description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- 238000010791 quenching Methods 0.000 claims description 6
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- -1 chromium carbides Chemical class 0.000 claims description 5
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- 238000011156 evaluation Methods 0.000 abstract description 18
- 229910052799 carbon Inorganic materials 0.000 abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 13
- 239000011248 coating agent Substances 0.000 abstract description 12
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- 230000015572 biosynthetic process Effects 0.000 description 6
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- 239000011572 manganese Substances 0.000 description 5
- 239000002344 surface layer Substances 0.000 description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 150000001247 metal acetylides Chemical class 0.000 description 4
- 241000588724 Escherichia coli Species 0.000 description 3
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910001130 Razor blade steel Inorganic materials 0.000 description 2
- 241000191967 Staphylococcus aureus Species 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
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- 102000004190 Enzymes Human genes 0.000 description 1
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- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
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- 238000005245 sintering Methods 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- 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
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous 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
- C22C38/18—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
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/32—Soft annealing, e.g. spheroidising
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- C21D6/00—Heat treatment of ferrous alloys
- C21D6/002—Heat treatment of ferrous alloys containing Cr
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- 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
- C21D6/02—Hardening by precipitation
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- 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
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- 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
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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- 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
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- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
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- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
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- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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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
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- 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
- C21D2211/004—Dispersions; Precipitations
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- 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
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Abstract
Description
従って、抗菌性を評価する時には、細菌培養の開始以降に発錆現象が観察されない程度の耐食性の確保が必須である。
PREN=Cr+3.0(Mo+1/2W)+16N
−第1均熱過程:500℃で10時間
−昇温過程:昇温速度100℃/hr
−第2均熱過程:850℃で20時間
−冷却過程:温度下降速度10℃/hr
−第3均熱過程:650℃で7時間
−Austenitizing:1100℃で5分
−Quenching:常温でオイルクエンチング
−Deep freezing:−70℃で5分
−Tempering/Sintering:500℃で30分
Claims (12)
- マルテンサイト系ステンレス鋼であって、
重量%で、C:0.45乃至0.65%、N:0.02乃至0.06%、Si:0.1乃至0.6%、Mn:0.3乃至1.0%、Ni:0.1乃至0.4%、Cr:13乃至14.5%、Mo:0.4乃至0.6%、W:0.8乃至1.2%、及びCu:1.5乃至2.0%を含有し、残りはFe及び不可避な不純物を含むことを特徴とする抗菌性に優れた高硬度マルテンサイト系ステンレス鋼。 - 前記マルテンサイト系ステンレス鋼は、延伸率が18%以上であることを特徴とする請求項1に記載の抗菌性に優れた高硬度マルテンサイト系ステンレス鋼。
- 前記マルテンサイト系ステンレス鋼の組織内に、90個/100μm2以上のクロム炭化物が分布されたことを特徴とする請求項2に記載の抗菌性に優れた高硬度マルテンサイト系ステンレス鋼。
- 前記マルテンサイト系ステンレス鋼は、下記の耐孔食指数(PREN)を満足し、NaClを含有した接種源を利用した抗菌性の評価時に、表面変質が起きず、99%以上の細菌減少率を示すことを特徴とする請求項3に記載の抗菌性に優れた高硬度マルテンサイト系ステンレス鋼。
耐孔食指数(PREN)Cr+3.0(Mo+1/2W)+16N≧17 - 前記マルテンサイト系ステンレス鋼の製造のためのバッチ焼鈍熱処理は、前記マルテンサイト系ステンレス鋼の組織内にCu析出物を均一に分布させる第1均熱過程、前記マルテンサイト系ステンレス鋼の組織内にクロム炭化物を均一に分布させる第2均熱過程及び前記クロム炭化物の微細粒子を球状化させる第3均熱過程を含むことを特徴とする請求項2乃至4のいずれか1項に記載の抗菌性に優れた高硬度マルテンサイト系ステンレス鋼。
- 前記第1均熱過程は、500乃至600℃で実施され、前記第2均熱過程は、800乃至900℃で実施され、前記第3均熱過程は、600乃至750℃で実施されることを特徴とする請求項5に記載の抗菌性に優れた高硬度マルテンサイト系ステンレス鋼。
- 前記第1均熱過程は、5乃至15時間の間持続され、前記第2均熱過程は、15乃至25時間の間持続され、前記第3均熱過程は、5乃至15時間の間持続されることを特徴とする請求項6に記載の抗菌性に優れた高硬度マルテンサイト系ステンレス鋼。
- 前記バッチ焼鈍熱処理は、前記第1均熱過程後に前記第2均熱過程に至るまで40乃至200℃/hの速度で昇温させる昇温過程、前記第2均熱過程後に前記第3均熱過程に至るまで10℃/h以上の速度で冷却させる冷却過程、前記第3均熱過程後に空冷過程をさらに含むことを特徴とする請求項7に記載の抗菌性に優れた高硬度マルテンサイト系ステンレス鋼。
- 抗菌性に優れた高硬度マルテンサイト系ステンレス鋼の製造方法であって、
主片を熱間圧延処理して熱延鋼板に製造する段階と、
前記熱延鋼板をバッチ焼鈍熱処理して軟質化作業を実行する段階と、
前記軟質化の完了した焼鈍鋼板を冷間圧延する冷延鋼板の製造段階と、を含み、
前記バッチ焼鈍熱処理は、前記熱延鋼板の組織内にCu析出物を均一に分布させる第1均熱過程、前記熱延鋼板の組織内にクロム炭化物を均一に分布させる第2均熱過程、及び前記クロム炭化物の微細粒子を球状化させる第3均熱過程を含むことを特徴とする抗菌性に優れた高硬度マルテンサイト系ステンレス鋼の製造方法。 - 前記第1均熱過程は、500乃至600℃で5乃至15時間の間実行され、前記第2均熱過程は、800乃至900℃で15乃至25時間の間実行され、前記第3均熱過程は、600乃至750℃で5乃至15時間の間実施行されることを特徴とする請求項9に記載の抗菌性に優れた高硬度マルテンサイト系ステンレス鋼の製造方法。
- 前記バッチ焼鈍熱処理は、前記第1均熱過程後に前記第2均熱過程に至るまで40乃至200℃/hの速度で昇温させる昇温過程、前記第2均熱過程後に前記第3均熱過程に至るまで10℃/h以上の速度で冷却させる冷却過程、前記第3均熱過程後に空冷過程をさらに含むことを特徴とする請求項10に記載の抗菌性に優れた高硬度マルテンサイト系ステンレス鋼の製造方法。
- 前記冷延鋼板に強化熱処理を実行する段階を更に含み、
前記強化熱処理は、均一に分布させた前記クロム炭化物を再固溶させるために1000℃乃至1150℃で10秒乃至5分間オーステナイジング処理する段階、常温でクエンチングする段階、残留オーステナイトをマルテンサイトに相変態させるために−70℃の温度で10秒乃至5分間サーブ剤で処理する段階、及び400乃至600℃で30分乃至2時間の間テンパーリングする段階を含むことを特徴とする請求項11に記載の抗菌性に優れた高硬度マルテンサイト系ステンレス鋼の製造方法。
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CN107699815B (zh) * | 2017-11-27 | 2019-08-30 | 上海大学 | 高硬度高韧性刀具用不锈钢及其制备方法 |
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KR102326693B1 (ko) * | 2020-03-20 | 2021-11-17 | 주식회사 포스코 | 고내식 마르텐사이트계 스테인리스강 및 그 제조방법 |
CN113846275B (zh) * | 2020-06-28 | 2023-06-13 | 中国科学院金属研究所 | 抗菌超高强度高韧性不锈钢材料及其制备方法 |
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