JP2010533791A - 高抵抗特性および延性特性を有する鋼板を製造する方法およびこのようにして得られた鋼板 - Google Patents
高抵抗特性および延性特性を有する鋼板を製造する方法およびこのようにして得られた鋼板 Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 134
- 239000010959 steel Substances 0.000 title claims abstract description 134
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 239000000203 mixture Substances 0.000 claims abstract description 33
- 229910001563 bainite Inorganic materials 0.000 claims abstract description 31
- 229910001566 austenite Inorganic materials 0.000 claims abstract description 17
- 229910000734 martensite Inorganic materials 0.000 claims abstract description 15
- 230000000717 retained effect Effects 0.000 claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 20
- 238000001816 cooling Methods 0.000 claims description 18
- 238000000576 coating method Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 13
- 239000011248 coating agent Substances 0.000 claims description 12
- 238000005096 rolling process Methods 0.000 claims description 11
- 239000011265 semifinished product Substances 0.000 claims description 10
- 239000011701 zinc Substances 0.000 claims description 9
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 8
- 229910052725 zinc Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 238000007670 refining Methods 0.000 claims description 4
- 239000013589 supplement Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000005098 hot rolling Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 229910001297 Zn alloy Inorganic materials 0.000 claims description 2
- 239000000047 product Substances 0.000 claims description 2
- 229910000838 Al alloy Inorganic materials 0.000 claims 1
- 229910000611 Zinc aluminium Inorganic materials 0.000 claims 1
- 229910052758 niobium Inorganic materials 0.000 abstract description 5
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 4
- 229910052717 sulfur Inorganic materials 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 12
- 229910052799 carbon Inorganic materials 0.000 description 12
- 230000015572 biosynthetic process Effects 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 229910000859 α-Fe Inorganic materials 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- 229910052720 vanadium Inorganic materials 0.000 description 9
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 9
- 238000001556 precipitation Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000011572 manganese Substances 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 6
- 230000009466 transformation Effects 0.000 description 6
- 239000010955 niobium Substances 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 238000004804 winding Methods 0.000 description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 4
- 238000005266 casting Methods 0.000 description 4
- 239000011651 chromium Substances 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 4
- 229910052750 molybdenum Inorganic materials 0.000 description 4
- 239000011733 molybdenum Substances 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 239000006104 solid solution Substances 0.000 description 4
- 238000007792 addition Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
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- 238000007654 immersion Methods 0.000 description 3
- 150000001247 metal acetylides Chemical class 0.000 description 3
- 229910001562 pearlite Inorganic materials 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 238000010622 cold drawing Methods 0.000 description 2
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- 239000008397 galvanized steel Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000010297 mechanical methods and process Methods 0.000 description 2
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 241000428199 Mustelinae Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910000794 TRIP steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000001687 destabilization Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- CADICXFYUNYKGD-UHFFFAOYSA-N sulfanylidenemanganese Chemical compound [Mn]=S CADICXFYUNYKGD-UHFFFAOYSA-N 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
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- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
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Abstract
Description
少なくとも80%の上部ベイナイト、この構造は、フェライト−ベイナイトラスおよびこれらのラス間に位置する炭化物からなり、析出はベイナイト変態中に起こる。このマトリックスは高い延性と相まって高い強度特性を有する。非常に優先的に、微構造は少なくとも90%の上部ベイナイトからなり、微構造はそのとき非常に均質であり、変形の局在性を防ぐ、
可能性のある補足物として、構造は、下部ベイナイトと、恐らくマルテンサイトとを含む:
下部ベイナイトから炭化物の析出がフェライトラス内で起こる。上部ベイナイトと比較して、下部ベイナイトはわずかに高い強度を有するが低い延性を有する、
マルテンサイトは頻繁にM−A(マルテンサイト−残留オーステナイト)化合物の形で残留オーステナイトと関連する。マルテンサイトおよび残留オーステナイトの全含有量は延性を低減しないために5%に制限されなければならない。
本発明による組成の鋼が準備され、それから鋳造されて半製品を形成する。この鋳造は、インゴットを形成する、または約200mmの厚みを有するスラブを連続的に形成するために実行されてもよい。数十ミリメートルの厚みの薄いスラブまたは反対方向に回転する鋼ロール間で薄いストリップを形成するために鋳造が実行されてもよい。
鋼の降伏応力は低減され、それによって、小さな力の延伸プレスを使用すること、および/または低温延伸によるよりも製造するのが困難な部品を製造することを可能にする、
温間延伸の温度範囲は、ブランクが炉から取り除かれ、延伸プレスに移動される場合、温度のわずかな低下を考慮し、T℃の加熱温度については、延伸は(T−20℃)の温度でスタートすることができる。しかしながら、延伸温度は、最終部品のスプリングバックおよび残留応力のレベルを制限するために、350℃より高くなければならない。低温延伸工程と比較して、このスプリングバックの低下は、部品がより良好な最終幾何公差で製造されることを可能にする。
以下の表に付与され、重量パーセントで表された組成を有する鋼が製造された。本発明による鋼板を製造する役目をする鋼I−1とは別に、表は、基準鋼板を製造するために使用される鋼R−1およびR−2の組成を比較によって示す。
鋼I−1の板が、この鋼のために表2で定義されたパラメーターを使用して製造され、ブランクを得るために切断された。400℃または690℃の温度Tに加熱し、これらの温度で7分または10分間浸漬し、350℃または640℃のそれぞれの温度で温間延伸した後、得られた部品は、周囲温度まで25℃/sまたは100℃/sの速度V’Cで冷却された。速度V’Cは、温度Tと周囲温度との間の平均冷却速度を示す。このように得られた部品の引張強度Rmは表4に示される。
Claims (20)
- 800MPaより大きい引張強度および10%より大きい破断点伸びを有する熱間圧延鋼板または部品であって、その組成が、含有量を重量で表して、
0.050%≦C≦0.090%
1%≦Mn≦2%
0.015%≦Al≦0.050%
0.1%≦Si≦0.3%
0.10%≦Mo≦0.40%
S≦0.010%
P≦0.025%
0.003%≦N≦0.009%
0.12%≦V≦0.22%
Ti≦0.005%
Nb≦0.020%
および、任意に、
Cr≦0.45%を含み、
組成の残部が、鉄および精錬に起因する不可避的不純物からなり、前記鋼板または前記部品の微構造が、表面比として少なくとも80%の上部ベイナイトを含み、可能性のある補足物が下部ベイナイトと、マルテンサイトと、残留オーステナイトとからなり、マルテンサイトおよび残留オーステナイト含有量の合計が5%未満である、熱間圧延鋼板または部品。 - 前記鋼の組成が、含有量を重量で表して、
0.050%≦C≦0.070%を含むことを特徴とする、請求項1に記載の鋼板または部品。 - 前記鋼の組成が、含有量を重量で表して、
0.070%<C≦0.090%を含むことを特徴とする、請求項1に記載の鋼板または部品。 - 前記鋼の組成が、含有量を重量で表して、
1.4%≦Mn≦1.8%を含むことを特徴とする、請求項1から3のいずれか一項に記載の鋼板または部品。 - 前記鋼の組成が、含有量を重量で表して、
0.020%≦Al≦0.040%を含むことを特徴とする、請求項1から4のいずれか一項に記載の鋼板または部品。 - 前記鋼の組成が、含有量を重量で表して、
0.12%≦V≦0.16%を含むことを特徴とする、請求項1から5のいずれか一項に記載の鋼板または部品。 - 前記鋼の組成が、含有量を重量で表して、
0.18%≦Mo≦0.30%を含むことを特徴とする、請求項1から6のいずれか一項に記載の鋼板または部品。 - 前記鋼の組成が、含有量を重量で表して、
Nb≦0.005%を含むことを特徴とする、請求項1から7のいずれか一項に記載の鋼板または部品。 - 前記鋼の組成が、含有量を重量で表して、
0.20%≦Cr≦0.45%を含むことを特徴とする、請求項1から8のいずれか一項に記載の鋼板または部品。 - 前記鋼板または前記部品が、亜鉛系コーティングまたはアルミニウム系コーティングで被覆されていることを特徴とする、請求項1から9のいずれか一項に記載の鋼板または部品。
- 400から690℃の温度Tで加熱すること、次いで350℃から(T−20℃)の温度範囲で温間延伸すること、次いで周囲温度に冷却することを含む方法に起因することを特徴とする、請求項1から9のいずれか一項に記載の組成および微構造を有する鋼部品。
- 少なくとも1つの鋼板または部品が高エネルギー密度ビームによって溶接されることを特徴とする、請求項1から11のいずれか一項に記載の少なくとも1つの鋼板または部品から製造された溶接アセンブリ。
- 800MPaより大きい引張強度および10%より大きい破断点伸びを有する熱間圧延鋼板を製造する方法であって、
請求項1から9のいずれか一項に記載の組成を有する鋼が準備され、
この鋼から半製品が鋳造され、
前記半製品が1150℃より高い温度に加熱され、
前記半製品が、鋼の微構造が完全オーステナイトである温度範囲の温度TERに熱間圧延されて鋼板を得て、
前記鋼板が、冷却速度VCが75から200℃/sであるように冷却され、
前記鋼板が、500から600℃の温度Tcoilで冷却される、方法。 - 最終圧延温度TERが870から930℃であることを特徴とする、請求項13に記載の熱間圧延鋼板を製造する方法。
- 冷却速度VCが80から150℃/sであることを特徴とする、請求項13または14に記載の熱間圧延鋼板を製造する方法。
- 請求項13から15のいずれか一項に従って製造された鋼板が酸洗され、次いで任意にスキンパスされ、次いで、亜鉛または亜鉛合金、あるいはアルミニウムまたはアルミニウム合金で被覆される、製造方法。
- 前記コーティングが溶融コーティングによって連続的に行なわれることを特徴とする、請求項16に記載の鋼板を製造する方法。
- 温間延伸された部品を製造する方法であって、
請求項1から10のいずれか一項に記載の、または請求項13から17のいずれか一項に記載の方法によって製造された鋼板が準備され、
前記鋼板が切断されてブランクを得て、
前記ブランクが、部分的にまたは完全に400から690℃の温度Tに加熱され、15分未満の時間維持されて加熱されたブランクを得て、
前記加熱されたブランクが、350からT−20℃の温度で延伸されて部品を得て、
前記部品が速度V’Cで周囲温度に冷却されることを特徴とする、方法。 - 速度V’Cが25から100℃/sであることを特徴とする、請求項18に記載の製造方法。
- 自動車分野で構造部品または補強部材を製造するための、請求項1から10のいずれか一項に記載の、または請求項13から19のいずれか一項に記載の方法によって製造された熱間圧延鋼板の使用。
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UA98798C2 (ru) | 2012-06-25 |
RU2010105699A (ru) | 2011-08-27 |
ZA201000290B (en) | 2010-10-27 |
PL2171112T3 (pl) | 2012-04-30 |
KR101892423B1 (ko) | 2018-08-27 |
WO2009034250A1 (fr) | 2009-03-19 |
US20180148806A1 (en) | 2018-05-31 |
EP2020451A1 (fr) | 2009-02-04 |
CN101784688A (zh) | 2010-07-21 |
BRPI0814514A2 (pt) | 2015-02-03 |
US10428400B2 (en) | 2019-10-01 |
US20100221573A1 (en) | 2010-09-02 |
CA2694069A1 (fr) | 2009-03-19 |
US20180163282A9 (en) | 2018-06-14 |
BRPI0814514B1 (pt) | 2019-09-03 |
EP2171112B1 (fr) | 2011-11-23 |
KR20130010030A (ko) | 2013-01-24 |
RU2451764C2 (ru) | 2012-05-27 |
US20150203932A1 (en) | 2015-07-23 |
CN101784688B (zh) | 2011-11-23 |
CA2694069C (fr) | 2013-05-21 |
EP2171112A1 (fr) | 2010-04-07 |
ATE534756T1 (de) | 2011-12-15 |
KR20150123957A (ko) | 2015-11-04 |
JP5298127B2 (ja) | 2013-09-25 |
KR20180014843A (ko) | 2018-02-09 |
KR20100037147A (ko) | 2010-04-08 |
KR20140044407A (ko) | 2014-04-14 |
AR067594A1 (es) | 2009-10-14 |
ES2375429T3 (es) | 2012-02-29 |
MA31525B1 (fr) | 2010-07-01 |
US10214792B2 (en) | 2019-02-26 |
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