JP2015520802A - 高強度成形性熱間圧延鋼シートから製造した自動車シャシ部品 - Google Patents
高強度成形性熱間圧延鋼シートから製造した自動車シャシ部品 Download PDFInfo
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- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
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- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
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- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- 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
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- 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
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- 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
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
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- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B2015/0057—Coiling the rolled product
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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
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- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
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- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
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- Y10T428/12792—Zn-base component
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Abstract
Description
・最大0.15%のC
・最大0.5%のSi
・0.5〜2.0%のMn
・最大0.06%のP
・最大0.008%のS
・最大0.1%のSol.Al
・最大0.02%のN
・0.02〜0.45%のV
・0.05〜0.7%のMo
・所望により0.01〜0.1%のNb
・残部Fe及び不可避な不純物
を含み、鋼シートが、析出強化され、実質的に単相フェライト系微細構造を有し、該微細構造におけるフェライト相の体積画分が97%以上であり、該微細構造における析出物が、Mo及びV及び所望によりNbを含む複合炭化物の微細析出物を含んでなる、高強度熱間圧延鋼シートを提供することにより達成される。
・少なくとも1.2%のMn及び/又は
・少なくとも0.02%のAl sol及び/又は
・少なくとも0.04%のV及び/又は
・少なくとも0.1%のMo及び/又は
・少なくとも0.02%のC及び/又は
・少なくとも0.002%のN
を含む。
・少なくとも750MPaの引張強度及び少なくとも60%の穴広げ率を有し、引張強度(TS)、総伸長(El)、及びシート厚さt(mm)が等式
・少なくとも980MPaの引張強度及び少なくとも30%の穴広げ率を有し、引張強度(TS)、総伸長(El)、及びシート厚さt(mm)が等式
・少なくとも760MPaの降伏強度、0.9の最小降伏比、及び少なくとも60%の穴広げ率、及び1000MPaの、破損までの100000サイクルに対する最小疲労強度(Δσ)を有し、及び引張強度(TS)、総伸長(El)、及びシート厚さt(mm)が等式
σ0=53.9MPa、及び固溶強化は、
表4に示す化学組成を有する鋼2A〜2Kを、表5及び6に示す条件下で熱間圧延し、鋼シート1〜66を製造し、熱間圧延は、最終厚さが約3.0〜3.5mmであった。ランアウトテーブル上の冷却速度は、表5及び6に挙げた全ての熱間圧延鋼シートに関して50℃/sであった。熱間圧延鋼シートは、酸洗してから試験(引張試験、穴広げ試験、曲げ性試験、及び疲労試験)した。場合により、鋼シートは、穏やかに研磨し、熱間圧延による表面粗さを除去してから試験した。
表8に化学組成を示す鋼3A及び3Bを、表9に示す条件下で熱間圧延し、鋼シート1〜8を熱間圧延で最終厚さ約3.0〜3.5mmに製造した。ランアウトテーブル上の2種類の冷却速度、即ち50および100℃/s、を使用した。熱間圧延鋼シートを酸洗してから、引張試験及び穴広げ試験にかけた。場合により、鋼シートは、穏やかに研磨し、熱間圧延による表面粗さを除去してから、試験した。
Claims (15)
- 少なくとも550MPaの引張強度及び成形性の優れた組合せを有する高強度熱間圧延鋼シートであって、重量%で
・最大0.15%のC
・最大0.5%のSi
・0.5〜2.0%のMn
・最大0.06%のP
・最大0.008%のS
・最大0.1%のAl sol
・最大0.02%のN
・0.02〜0.45%のV
・0.05〜0.7%のMo
・所望により0.01〜0.1%のNb
・残部Fe及び不可避な不純物
を含み、
・前記鋼シートが、析出強化され、実質的に単相フェライト系微細構造を有し、前記微細構造における前記フェライト相の体積画分が97%以上であり、前記微細構造における析出物が、Mo及びV及び所望によりNbを含む複合炭化物の微細析出物を含む、高強度熱間圧延鋼シート。 - 前記フェライト系微細構造中にある前記析出物が、Mo及びV及びNbを含む複合炭化物の微細析出物を含む、請求項1に記載の鋼シート。
- 前記フェライト系微細構造中にある前記析出物が、Mo及びVを含む複合炭化物の微細析出物を含み、複合炭化物の前記微細析出物がNbを含まない、請求項1に記載の鋼シート。
- 前記鋼が、
・少なくとも1.2%のMn及び/又は
・少なくとも0.02%のAl sol及び/又は
・少なくとも0.04%のV及び/又は
・少なくとも0.1%のMo及び/又は
・少なくとも0.02%のC及び/又は
・少なくとも0.002%のN
を含む、請求項1〜3のいずれか1項に記載の鋼シート。 - 前記微細構造が、炭素濃度が高い微細構造成分、例えばパーライト又はセメンタイトを含まない、及び/又はチタン系析出物又はチタン系介在物を含まない、請求項1〜4のいずれか1項に記載の鋼シート。
- 重量百分率で表したC、Nb、V及びMoの前記含有量が式
- 重量百分率で表したNb、V及びMoの前記含有量が式
- 重量百分率で表したC、N、Nb、V、Mo及びAlの前記含有量が式
- 重量百分率で表したAl及びNの前記含有量が式
- ・引張強度が少なくとも580MPaで、穴広げ率が90%以上、又は
・引張強度が少なくとも750MPaで、穴広げ率が60%以上、又は
・引張強度が少なくとも980MPaで、穴広げ率が30%以上
である、請求項1〜9のいずれか1項に記載の鋼シート。 - 前記鋼シートが、表面上に亜鉛系めっき被覆を有する、請求項1〜10のいずれか1項に記載の鋼シート。
- 少なくとも550MPaの引張強度及び成形性、又は少なくとも750MPaの引張強度及び少なくとも60%の穴広げ率、又は少なくとも980MPaの引張強度及び少なくとも30%の穴広げ率の優れた組合せを有する高強度鋼シートの製造方法であって、最大0.15%のC、最大0.5%のSi、0.5〜2.0%のMn、最大0.06%のP、最大0.008%のS、最大0.1%のSol.Al、最大0.02%のN、0.02〜0.45%のV、0.05〜0.7%のMo、所望により0.01〜0.1%のNb、及び残部Fe及び不可避な不純物を含む鋼スラブを熱間圧延し、前記熱間圧延をAr3変態点以上の仕上げ熱間圧延温度で仕上げ、前記熱間圧延した鋼シートを700〜585℃の温度範囲でコイル巻きする、方法。
- 前記熱間圧延鋼シートを約10℃/s〜約150℃/sの平均冷却速度でコイル巻き温度に冷却する、請求項12に記載の方法。
- 前記鋼シートの表面に亜鉛系のめっきを施すことをさらに含む、請求項12又は13に記載の方法。
- 請求項1〜11のいずれか1項に記載の高強度熱間圧延鋼シートを使用する自動車用シャシ部品であって、好ましくは前記鋼シートが、
・少なくとも750MPaの引張強度及び少なくとも60%の穴広げ率を有し、引張強度(TS)、総伸長(El)、及びシート厚さt(mm)が式
・少なくとも980MPaの引張強度及び少なくとも30%の穴広げ率を有し、引張強度(TS)、総伸長(El)、及びシート厚さt(mm)が式
・少なくとも760MPaの降伏強度、0.9の最小降伏比、及び少なくとも60%の穴広げ率、及び1000MPaの、破損までの100000サイクルに対する最小疲労強度(Δσ)を有し、及び引張強度(TS)、総伸長(El)、及びシート厚さt(mm)が式
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EP12167140 | 2012-05-08 | ||
EP12167140.8 | 2012-05-08 | ||
PCT/EP2013/059455 WO2013167572A1 (en) | 2012-05-08 | 2013-05-07 | Automotive chassis part made from high strength formable hot rolled steel sheet |
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KR (1) | KR102095071B1 (ja) |
CN (1) | CN104411851B (ja) |
BR (1) | BR112014027992B1 (ja) |
CA (1) | CA2872728C (ja) |
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JP2018532045A (ja) * | 2015-09-22 | 2018-11-01 | タタ、スティール、アイモイデン、ベスローテン、フェンノートシャップTata Steel Ijmuiden Bv | 優れた伸びフランジ成形性を有するロール成形可能な高強度熱間圧延鋼板、および該鋼の製造方法 |
KR20190015409A (ko) * | 2016-06-21 | 2019-02-13 | 바오샨 아이론 앤 스틸 유한공사 | 980MPa급 열연 이상조직강 및 그의 제조방법 |
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MX2017010753A (es) | 2015-03-11 | 2017-11-28 | Nippon Steel & Sumitomo Metal Corp | Metodo de embridado. |
US10465260B2 (en) | 2015-04-10 | 2019-11-05 | The Nanosteel Company, Inc. | Edge formability in metallic alloys |
KR20170134729A (ko) | 2015-04-10 | 2017-12-06 | 더 나노스틸 컴퍼니, 인코포레이티드 | 금속 합금에서의 에지 성형성의 개선 |
JP6098664B2 (ja) * | 2015-05-08 | 2017-03-22 | Jfeスチール株式会社 | せん断縁の成形可否評価方法 |
EP3162558A1 (en) * | 2015-10-30 | 2017-05-03 | Outokumpu Oyj | Component made of metallic composite material and method for the manufacture of the component by hot forming |
CN105734423B (zh) * | 2016-04-27 | 2018-08-10 | 宝山钢铁股份有限公司 | 一种1180MPa级析出强化型热轧超高强钢及其制造方法 |
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JP2016513174A (ja) * | 2013-02-11 | 2016-05-12 | タタ、スティール、アイモイデン、ベスローテン、フェンノートシャップTata Steel Ijmuiden Bv | 非常に優れた成形性および疲労性能を有する高強度熱間圧延鋼帯または鋼板、および前記鋼帯または鋼板の製造方法 |
JP2018532045A (ja) * | 2015-09-22 | 2018-11-01 | タタ、スティール、アイモイデン、ベスローテン、フェンノートシャップTata Steel Ijmuiden Bv | 優れた伸びフランジ成形性を有するロール成形可能な高強度熱間圧延鋼板、および該鋼の製造方法 |
US10870901B2 (en) | 2015-09-22 | 2020-12-22 | Tata Steel Ijmuiden B.V. | Hot-rolled high-strength roll-formable steel sheet with excellent stretch-flange formability and a method of producing said steel |
KR20190015409A (ko) * | 2016-06-21 | 2019-02-13 | 바오샨 아이론 앤 스틸 유한공사 | 980MPa급 열연 이상조직강 및 그의 제조방법 |
KR102236345B1 (ko) | 2016-06-21 | 2021-04-06 | 바오샨 아이론 앤 스틸 유한공사 | 980MPa급 열연 이상조직강 및 그의 제조방법 |
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EP2847362B1 (en) | 2016-11-23 |
JP6411330B2 (ja) | 2018-10-24 |
MX365792B (es) | 2019-06-14 |
ZA201408407B (en) | 2016-08-31 |
CN104411851B (zh) | 2016-08-24 |
CA2872728A1 (en) | 2013-11-14 |
WO2013167572A1 (en) | 2013-11-14 |
CN104411851A (zh) | 2015-03-11 |
ES2612184T3 (es) | 2017-05-12 |
KR20150023353A (ko) | 2015-03-05 |
BR112014027992A2 (pt) | 2017-06-27 |
BR112014027992B1 (pt) | 2019-09-17 |
US9908566B2 (en) | 2018-03-06 |
KR102095071B1 (ko) | 2020-03-31 |
EP2847362A1 (en) | 2015-03-18 |
MX2014013484A (es) | 2015-06-17 |
CA2872728C (en) | 2018-11-06 |
US20150099139A1 (en) | 2015-04-09 |
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