JP6743133B2 - 降伏強度500MPa級高伸び率アルミニウム亜鉛溶融メッキの鋼板及びカラーメッキの鋼板の製造方法 - Google Patents
降伏強度500MPa級高伸び率アルミニウム亜鉛溶融メッキの鋼板及びカラーメッキの鋼板の製造方法 Download PDFInfo
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- JP6743133B2 JP6743133B2 JP2018511023A JP2018511023A JP6743133B2 JP 6743133 B2 JP6743133 B2 JP 6743133B2 JP 2018511023 A JP2018511023 A JP 2018511023A JP 2018511023 A JP2018511023 A JP 2018511023A JP 6743133 B2 JP6743133 B2 JP 6743133B2
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Description
本発明は、冷間圧延板生産技術領域に属され、降伏強度500MPa以上級高伸び率アルミニウム亜鉛溶融メッキ・カラーメッキ鋼板及びその製造方法に関する。
我が国のカラーメッキ板は主に建築領域に応用されている。壁面プレッシャープレートに高強度、良好な靱性及び優れる耐食性を有することが要求されている。多くの国内ユーザー(特に建築業界のユーザー)は、伸び率を損失しない前提で、構造用カラーメッキ板に対して構造材強度の向上と軽量化によって高強度化・薄肉化及びコストの低下を実現することを需要している。
本発明の目的は、降伏強度500MPa級高伸び率アルミニウム亜鉛溶融メッキ・カラーメッキの鋼板及びその製造方法を提供することである。鋼板は降伏強度が≧500MPaであり、引張強度が≧550MPaであり、伸び率が≧15%である優良な力学性能を有し、そのメッキ層が均一且つ緻密である。製品は、良好な強靱性を有しながら、優良な耐食性をも有するため、建築、自動車などの高降伏強度と高伸び率の要求を満足できる。尚、家電、エレベーターなどの電気機器にも用いられ、高強度化・薄肉化を実現できる。
降伏強度500MPa級高伸び率アルミニウム亜鉛溶融メッキ・カラーメッキの鋼板であって、基板化学成分の重量百分率表示で、C:0.07%〜0.15%、Si:0.02%〜0.15%、Mn:1.3%〜1.8%、S≦0.01%、N≦0.004%、Ti≦0.15%、Nb≦0.050%、残部がFeおよび他の不可避不純物であり、且つ下の条件を同時に満足する鋼板:
(C+Mn/6)≧0.3%;
Mn/S≧150;
Tiを含有しない時に、Nbが0.01%≦(Nb-0.22C-1.1N)≦0.05%を満足する;
Nbを含有しない時に、Tiが0.5≦Ti/C≦1.5を満足する;
TiとNbを複合添加する時に、0.04%≦(Ti+Nb)≦0.2%。
本発明は微量合金元素Nbを添加することを使用する。Nbは鋼中でNb(C、N)等の析出物を形成する。Nbを単独で添加するときに、成分設計が式0.01%≦(Nb-0.22C-1.1N)≦0.05%を満足すると、NbはC、Nと中間相を十分的に且つ細小に形成して、材質を強化する作用を発揮する。
2)熱間圧延、酸洗い:加熱出炉温度が1150〜1280℃であり、熱間圧延最終圧延温度が830〜890℃であり、熱間圧延巻取温度が500〜650℃であり、熱間圧延後の冷却方式が水冷である;
3)冷間圧延:冷間圧延圧下量を70〜80%にコントロールし、鋼帯を形成する;
4)連続焼なまし:無酸化連続焼なましアルミニウム亜鉛メッキ炉で行い、直燃加熱段、輻射管加熱段、均熱段、メッキ前冷却段、熱張力ロール区域と溶融メッキ段、メッキ後冷却を備えており、直燃加熱段時間が20〜60sであり、加熱温度が650〜710℃であり、輻射管加熱段が30〜60sであり、加熱温度が750〜840℃であり、均熱温度が750〜840℃であり、保温段が1〜10sであり、メッキ後冷却段が8〜15sであり、熱張力ロール区域と溶融メッキ段の時間が8〜12sであり、メッキ後冷却の冷却速度が≧20℃/sである;
5)溶融メッキ:鋼帯を亜鉛ポットに浸入して溶融メッキ処理を行い、メッキ液成分が重量百分率表示で、Al:48〜58%、Zn:40〜50%、Si:1.0〜2.0%、Ti:0.005〜0.050%であり、残部が不可避不純物であり、亜鉛ポット温度が550〜610℃であり、高強度低合金アルミニウム亜鉛溶融メッキ鋼帯を得る;
6)平滑矯正、くせ取り:平滑矯正率が0.25%±0.2であり、くせ取り率が0.2%±0.2である。
以下、実施例と図面と結合しながら、本発明についてさらに説明する。
降伏強度500MPa級高伸び率アルミニウム亜鉛溶融メッキ・カラーメッキの鋼板(カラーメッキ後の鋼板の厚みが0.5mmだった)の製造方法は下のステップを有した。
2)熱間圧延、酸洗い:熱間圧延出炉温度が1230℃であり、熱間圧延最終圧延温度が860℃であり、熱間圧延巻取温度が550℃であり、巻曲前に水焼入れ冷却して、熱間圧延板の(厚みが2.3mmだった;
3)冷間圧延:累計圧下率を80%にコントロールして、冷間圧延板の厚みが0.46mmだった;
4)連続焼なまし:無酸化連続焼なまし炉で行い、直火加熱段、輻射管加熱段、輻射管均熱及び冷却処理を備えており、直火加熱段が28sであり、加熱温度が680℃であり、輻射管加熱時間が38sであり、均熱温度が790℃であり、均熱時間が3sであり、冷却温度が600℃であり、冷却時間が11sだった;
5)アルミニウム亜鉛溶融メッキ:両面アルミニウム亜鉛溶融メッキ金属層の重量を150g/m2にコントロールした。そのメッキ層組成は重量百分比表示で、Al:489%、Zn:50%、Si:1.1%、Ti:0.01%であり、残部が不純物だった。帯鋼を亜鉛ポットに進入した温度を600℃にコントロールして、アルミニウム亜鉛液の温度を600℃にコントロールした。溶融メッキ後の冷却方式はガスミストジェット冷却だった。
7)選択的にカラーメッキをした。最終製品の厚みが0.5mmだった。
降伏強度500MPa級高伸び率アルミニウム亜鉛溶融メッキ・カラーメッキの鋼板(カラーメッキ後の鋼板の厚みが0.45mmだった)の製造方法は下のステップを有した。
2)熱間圧延、酸洗い:熱間圧延出炉温度が1230℃であり、熱間圧延最終圧延温度が860℃であり、熱間圧延巻取温度が550℃であり、巻曲前に水焼入れ冷却して、熱間圧延板の厚みが2.1mmだった;
3)冷間圧延:累計圧下率を80%にコントロールして、冷間圧延板の厚みが0.41mmだった;
4)連続焼なまし:無酸化連続焼なまし炉で行い、直火加熱段、輻射管加熱段、輻射管均熱及び冷却処理を備えており、直火加熱段が28sであり、加熱温度が680℃であり、誘導加熱時間が38sであり、均熱温度が785℃であり、均熱時間が4sであり、冷却温度が600℃であり、冷却時間が11sだった;
5)アルミニウム亜鉛溶融メッキ:両面アルミニウム亜鉛溶融メッキ金属層の重量を150g/m2にコントロールした。そのメッキ層組成は重量百分比表示で、Al:49%、Zn:49%、Si:1.1%、Ti:0.02%だった。帯鋼を亜鉛ポットに進入した温度を600℃にコントロールして、アルミニウム亜鉛液の温度を590℃にコントロールした。溶融メッキ後の冷却方式がガスミストジェット冷却だった。
7)選択的にカラーメッキをした。最終製品の厚みが0.45mmだった。
降伏強度500MPa級高伸び率アルミニウム亜鉛溶融メッキ・カラーメッキの鋼板(カラーメッキ後の鋼板の厚みが0.5mmだった)の製造方法は下のステップを有した。
2)熱間圧延、酸洗い:熱間圧延出炉温度が1200℃であり、熱間圧延最終圧延温度が880℃であり、熱間圧延巻取温度が630℃であり、巻曲前に水焼入れ冷却して、熱間圧延板の厚みが1.93mmだった;
3)冷間圧延:累計圧下率を71%にコントロールして、冷間圧延板の厚みが0.56mmだった;
4)連続焼なまし:無酸化連続焼なまし炉で行い、直火加熱段、輻射管加熱段、輻射管均熱及び冷却処理を備えており、直火加熱段が31sであり、加熱温度が690℃であり、輻射管加熱時間が42sであり、均熱温度が835℃であり、均熱時間が4sであり、冷却温度が600℃であり、冷却時間が11sだった;
5)アルミニウム亜鉛溶融メッキ:両面アルミニウム亜鉛溶融メッキ金属層の重量を150g/m2にコントロールした。そのメッキ層組成は重量百分比表示で、Al:52%、Zn:45%、Si:2%、Ti:0.05%、残部が不純物だった。帯鋼を亜鉛ポットに進入した温度を600℃にコントロールして、アルミニウム亜鉛液の温度を560℃にコントロールした。溶融メッキ後の冷却方式がガスミストジェット冷却だった。
7)選択的にカラーメッキをした。最終製品の厚みが0.6mmだった。
降伏強度500MPa級高伸び率アルミニウム亜鉛溶融メッキ・カラーメッキの鋼板(カラーメッキ後の鋼板の厚みが0.45mmだった)の製造方法は下のステップを有した。
2)熱間圧延、酸洗い:熱間圧延出炉温度が1170℃であり、熱間圧延最終圧延温度が810℃であり、熱間圧延巻取温度が510℃であり、巻曲前に水焼入れ冷却して、熱間圧延板の厚みが2.3mmだった;
3)冷間圧延:累計圧下率を76%にコントロールして、冷間圧延板の厚みが0.56mmだった;
4)連続焼なまし:無酸化連続焼なまし炉で行い、直火加熱段、輻射管加熱段、輻射管均熱及び冷却処理を備えており、直火加熱段が31sであり、加熱温度が680℃であり、誘導加熱時間が38sであり、均熱温度が785℃であり、均熱時間が4sであり、冷却温度が600℃であり、冷却時間が11sだった;
5)アルミニウム亜鉛溶融メッキ:両面アルミニウム亜鉛溶融メッキ金属層の重量を150g/m2にコントロールした。そのメッキ層組成は重量百分比表示で、Al:52%、Zn:45%、Si:2%、Ti:0.05%だった。帯鋼を亜鉛ポットに進入した温度を600℃にコントロールして、アルミニウム亜鉛液の温度を605℃にコントロールした。溶融メッキ後の冷却方式がガスミストジェット冷却だった。
7)選択的にカラーメッキをした。最終製品の厚みが0.6mmだった。
降伏強度500MPa級高伸び率アルミニウム亜鉛溶融メッキ・カラーメッキの鋼板(カラーメッキ後の鋼板の厚みが0.5mmだった)の製造方法は下のステップを有した。
2)熱間圧延、酸洗い:熱間圧延出炉温度が1250℃であり、熱間圧延最終圧延温度が890℃であり、熱間圧延巻取温度が640℃であり、巻曲前に水焼入れ冷却して、熱間圧延板の厚みが2.3mmだった;
3)冷間圧延:累計圧下率を80%にコントロールして、冷間圧延板の厚みが0.46mmだった;
4)連続焼なまし:無酸化連続焼なまし炉で行い、直火加熱段、輻射管加熱段、輻射管均熱及び冷却処理を備えており、直火加熱段が44sであり、加熱温度が680℃であり、輻射管加熱時間が43sであり、均熱温度が755℃であり、均熱時間が8sであり、冷却温度が600℃であり、冷却時間が11sだった;
5)アルミニウム亜鉛溶融メッキ:両面アルミニウム亜鉛溶融メッキ金属層の重量を150g/m2にコントロールした。そのメッキ層組成は重量百分比表示で、Al:53%、Zn:44%、Si:2%、Ti:0.05%、残部が不純物だった。帯鋼を亜鉛ポットに進入した温度を600℃にコントロールして、アルミニウム亜鉛液の温度を600℃にコントロールした。溶融メッキ後の冷却方式がガスミストジェット冷却だった。
7)選択的にカラーメッキをした。最終製品の厚みが0.5mmだった。
降伏強度500MPa級高伸び率アルミニウム亜鉛溶融メッキ・カラーメッキの鋼板(カラーメッキ後の鋼板の厚みが0.45mmだった)の製造方法は下のステップを有した。
2)熱間圧延、酸洗い:熱間圧延出炉温度が1250℃であり、熱間圧延最終圧延温度が860℃であり、熱間圧延巻取温度が620℃であり、巻曲前に水焼入れ冷却して、熱間圧延板の厚みが2.3mmだった;
3)冷間圧延:累計圧下率を80%にコントロールして、冷間圧延板の厚みが0.46mmだった;
4)連続焼なまし:無酸化連続焼なまし炉で行い、直火加熱段、輻射管加熱段、輻射管均熱及び冷却処理を備えており、直火加熱段が28sであり、加熱温度が680℃であり、誘導加熱時間が38sであり、均熱温度が790℃であり、均熱時間が4sであり、冷却温度が600℃であり、冷却時間が11sだった;
5)アルミニウム亜鉛溶融メッキ:両面アルミニウム亜鉛溶融メッキ金属層の重量を150g/m2にコントロールした。そのメッキ層組成は重量百分比表示で、Al:53%、Zn:44%、Si:2%、Ti:0.05%だった。帯鋼を亜鉛ポットに進入した温度を600℃にコントロールして、アルミニウム亜鉛液の温度を560℃にコントロールした。溶融メッキ後の冷却方式がガスミストジェット冷却だった。
7)選択的にカラーメッキをした。最終製品の厚みが0.5mmだった。
78MPaであり、破断伸び率A80mmが15.6%だった。
帯状結晶粒+細小析出物の多相組織だった。
Claims (11)
- 基板化学成分の質量百分率表示で、C:0.07%〜0.15%、Si:0.02%〜0.5%、Mn:1.3%〜1.8%、N≦0.004%、S≦0.01%、Ti≦0.15%、Nb≦0.050%、残部がFeおよび他の不可避不純物であり、且つ下の条件を同時に満足する降伏強度500MPa級高伸び率アルミニウム亜鉛溶融メッキの鋼板。
(C+Mn/6)≧0.3%;
Mn/S≧150;
Tiを添加しない時に、Nbが0.01%≦(Nb-0.22C-1.1N)≦0.05%を満足する;
Nbを添加しない時に、Tiが0.5≦Ti/C≦1.5を満足する;
TiとNbを複合添加する時に、0.04%≦(Ti+Nb)≦0.2%;
前記鋼板のメッキ層の化学成分の質量百分率は、48〜58%のAl、40〜50%のZn、1.0〜2.0%のSi、0.005〜0.050%のTiであり、残部が不可避不純物であり、
前記鋼板の降伏強度が≧500MPaであり、引張強度が≧550MPaであり、破断伸び率が≧15%である。 - 前記鋼板の微細組織が、フェライト+セメンタイト+析出物+ベイナイト+マルテンサイト+変形帯状結晶粒を含む多相組織であることを特徴とする請求項1に記載の降伏強度500MPa級高伸び率アルミニウム亜鉛溶融メッキの鋼板。
- アルミニウム亜鉛溶融メッキ後の鋼板表面が銀白スパンコールであり、スパンコール結晶粒の直径が10mmよりも小さいことを特徴とする請求項1または請求項2に記載の降伏強度500MPa級高伸び率アルミニウム亜鉛溶融メッキの鋼板。
- スパンコール結晶粒の直径が5mmよりも小さいことを特徴とする請求項3に記載の降伏強度500MPa級高伸び率アルミニウム亜鉛溶融メッキの鋼板。
- 表面に被覆される被覆層を備え、前記被覆層が、フッ化炭素被覆層、ポリエステル被覆層、シリコン変性ポリエステル被覆層、高耐候性ポリエステル被覆層およびポリフッ化ビニリデン被覆層からなる群から選択される、請求項1、請求項2、請求項3または請求項4に記載の降伏強度500MPa級高伸び率アルミニウム亜鉛溶融メッキの鋼板。
- 下のステップを備えることを特徴とする請求項1に記載の降伏強度500MPa級高伸び率アルミニウム亜鉛溶融メッキの鋼板の製造方法。
1)製錬、鋳造:製錬し、鋳造し、請求項1の鋼板の基板の化学成分を有する鋳造スラブを得る;
2)熱間圧延、酸洗い:加熱出炉温度が1150〜1280℃であり、熱間圧延最終圧延温度が800〜900℃であり、熱間圧延巻取温度が500〜650℃であり、熱間圧延後の冷却方式が水冷である;
3)冷間圧延:冷間圧延圧下量が70〜80%であり、鋼帯を形成する;
4)連続焼なまし:無酸化連続焼なましアルミニウム亜鉛メッキ炉で行い、直燃加熱段、輻射管加熱段、均熱段、メッキ前冷却段、熱張力ロール区域と溶融メッキ段、メッキ後冷却を備えており、直燃加熱段時間が20〜60sであり、加熱温度が650〜710℃であり、輻射管加熱段が30〜60sであり、加熱温度が750〜840℃であり、均熱温度が750〜840℃であり、均熱段が1〜10sであり、メッキ前冷却段が8〜15sであり、熱張力ロール区域と溶融メッキ段の時間が8〜12sであり、鋼帯を亜鉛ポットに浸入して溶融メッキ処理を行い、メッキ液成分が重量百分率表示で、Al:48〜58%、Zn:40〜50%、Si:1.0〜2.0%、Ti:0.005〜0.050%であり、残部が不可避不純物であり、亜鉛ポット温度が550〜610℃であり、メッキ後冷却の冷却速度が≧20℃/sであり、高強度低合金アルミニウム亜鉛溶融メッキ鋼帯を得る;
5)平滑矯正、くせ取り:平滑矯正率が0.25%±0.2%であり、くせ取り率が0.2%±0.2%である。 - ステップ4)のメッキ後冷却が、噴冷気またはガスミストジェット冷却を使用することを特徴とする請求項6に記載の降伏強度500MPa級高伸び率アルミニウム亜鉛溶融メッキの鋼板の製造方法。
- 前記鋼板の微細組織が、フェライト+セメンタイト+析出物+ベイナイト+マルテンサイト+変形帯状結晶粒を含む多相組織であることを特徴とする請求項6または7に記載の降伏強度500MPa級高伸び率アルミニウム亜鉛溶融メッキの鋼板の製造方法。
- アルミニウム亜鉛溶融メッキ後の鋼板表面が銀白スパンコールであり、スパンコール結晶粒の直径が10mmよりも小さいことを特徴とする請求項6に記載の降伏強度500MPa級高伸び率アルミニウム亜鉛溶融メッキの鋼板の製造方法。
- スパンコール結晶粒の直径が5mmよりも小さいことを特徴とする請求項9に記載の降伏強度500MPa級高伸び率アルミニウム亜鉛溶融メッキの鋼板の製造方法。
- 方法が、請求項6、請求項7、請求項8、請求項9または請求項10に記載の方法によって製造される降伏強度500MPa級高伸び率アルミニウム亜鉛溶融メッキの鋼板を、フッ化炭素被覆層、ポリエステル被覆層、シリコン変性ポリエステル被覆層、高耐候性ポリエステル被覆層およびポリフッ化ビニリデン被覆層からなる群から選択される被覆層で被覆することによってカラーメッキの鋼板を得ることを特徴とするカラーメッキの鋼板の製造方法。
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JP6694663B2 (ja) * | 2017-12-26 | 2020-05-20 | 日鉄日新製鋼株式会社 | 溶融Al系めっき鋼帯およびその製造方法 |
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CN109295283A (zh) * | 2018-11-14 | 2019-02-01 | 东北大学 | 一种快速退火制备1000MPa级高延性钢的方法 |
JP6704669B1 (ja) * | 2019-08-29 | 2020-06-03 | Jfe鋼板株式会社 | 加工部耐食性に優れた溶融Al−Zn系合金めっき鋼板およびその製造方法 |
KR102305753B1 (ko) * | 2019-12-18 | 2021-09-27 | 주식회사 포스코 | 가공부 내식성이 우수한 Zn-Al-Mg계 용융합금도금 강재 및 그 제조방법 |
CN112126881A (zh) * | 2020-10-12 | 2020-12-25 | 马鞍山钢铁股份有限公司 | 一种短时间退火生产深冲级热浸镀层钢板及其生产方法 |
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CN115181888A (zh) * | 2021-04-02 | 2022-10-14 | 宝山钢铁股份有限公司 | 屈服强度450MPa级低碳低合金热镀铝锌或锌铝镁复相钢及其制造方法 |
CN115161542B (zh) * | 2021-04-02 | 2024-02-13 | 宝山钢铁股份有限公司 | 屈服强度550MPa级热镀铝锌或锌铝镁复相钢及其制造方法 |
KR20230164130A (ko) | 2021-04-02 | 2023-12-01 | 바오샨 아이론 앤 스틸 유한공사 | 항복강도가 450MPa 이상인 용융 알루미늄-아연 도금 또는 용융 아연-알루미늄-마그네슘 도금 복합조직강 및 이의 급속 열처리 용융 도금 제조 방법 |
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CN113403541A (zh) * | 2021-06-22 | 2021-09-17 | 攀钢集团攀枝花钢铁研究院有限公司 | 550MPa级低合金高强冷轧钢板及其生产方法 |
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CN114703426B (zh) * | 2022-04-08 | 2023-04-28 | 马鞍山钢铁股份有限公司 | 一种锌铝镁镀层高强钢板及高效生产不同强度级别高强钢板的方法 |
CN114921728A (zh) * | 2022-07-21 | 2022-08-19 | 北京科技大学 | 高强钢及其制备方法和应用 |
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CN105063484B (zh) | 2015-08-28 | 2017-10-31 | 宝山钢铁股份有限公司 | 屈服强度500MPa级高延伸率热镀铝锌及彩涂钢板及其制造方法 |
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US20180245175A1 (en) | 2018-08-30 |
AU2016314895B2 (en) | 2022-08-04 |
DE112016003935T8 (de) | 2018-06-07 |
US10982296B2 (en) | 2021-04-20 |
RU2018112072A3 (ja) | 2020-01-23 |
RU2018112072A (ru) | 2020-01-10 |
RU2736476C2 (ru) | 2020-11-17 |
MY186913A (en) | 2021-08-26 |
DE112016003935T5 (de) | 2018-05-24 |
CA2995290C (en) | 2023-07-25 |
CN105063484B (zh) | 2017-10-31 |
CN105063484A (zh) | 2015-11-18 |
KR20180048614A (ko) | 2018-05-10 |
CA2995290A1 (en) | 2017-03-09 |
AU2016314895A1 (en) | 2018-04-05 |
JP2018532043A (ja) | 2018-11-01 |
WO2017036260A1 (zh) | 2017-03-09 |
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