JP2020504237A - 耐腐食性及び表面品質に優れた合金めっき鋼材及びその製造方法 - Google Patents
耐腐食性及び表面品質に優れた合金めっき鋼材及びその製造方法 Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
Description
下記表1に示すように、0.5〜2.3mmの厚さを有する冷延素地鉄の試験片に対して、Mg:0.5〜2.0%、Al:0.5〜2.5%を含有したZnめっき浴に浸漬してめっきを行い、片面めっき量35〜100g/m2でめっき付着量を調節した。上記めっき付着量は、ガスノズルを用いてガスを噴射し、表面に圧力を加えて調節した。
[関係式1]
塗装剥離幅(mm)<−0.8×めっき層のMg含有量(wt%)+3
Claims (11)
- 素地鉄、及び前記素地鉄の少なくとも一面に形成された亜鉛合金めっき層を含む亜鉛合金めっき鋼材であって、
前記亜鉛合金めっき層は、重量%で、Mg:0.5〜2.0%、Al:0.5〜2.5%、残部Zn及び不可避不純物を含み、
前記亜鉛合金めっき層の表面は、面積分率で、Zn相の割合が15%以上であり、前記Zn相の平均直径が30μm以上である、耐腐食性及び表面品質に優れた合金めっき鋼材。 - 前記亜鉛合金めっき鋼材の表面粗さ(Ra)は0.4〜2.3である、請求項1に記載の耐腐食性及び表面品質に優れた合金めっき鋼材。
- 前記亜鉛合金めっき鋼材の面光沢度は、ISO 2813を基準に、表面測定角度20°で40〜120である、請求項1に記載の耐腐食性及び表面品質に優れた合金めっき鋼材。
- 前記亜鉛合金めっき鋼材は、塗装後の塗装剥離幅が下記関係式1を満たす、請求項1に記載の耐腐食性及び表面品質に優れた合金めっき鋼材。
[関係式1]
塗装剥離幅(mm)<−0.8×めっき層のMg含有量(wt%)+3 - 重量%で、Mg:0.5〜2.0%、Al:0.5〜2.5%、残部Zn及び不可避不純物を含む亜鉛合金めっき浴を設ける段階と、
前記亜鉛合金めっき浴に素地鉄を浸漬することで、めっきされた亜鉛合金めっき鋼材を得る段階と、
前記亜鉛合金めっき鋼材に対して、10体積%以下の酸素(O2)及び残りは不活性ガスを含む冷却ガスを400〜8000m3/Hrの流量で噴射することで430℃以下の温度まで冷却する段階と、
前記冷却された亜鉛合金めっき鋼材に対して仕上げ圧延を行う段階と、を含む、耐腐食性及び表面品質に優れた合金めっき鋼材の製造方法。 - 前記冷却ガスは、鋼板に対して垂直方向に上部30°以内、下部80°以内の角度で噴射する、請求項5に記載の耐腐食性及び表面品質に優れた合金めっき鋼材の製造方法。
- 前記冷却が行われる区間は、前記浸漬後のめっき量調節後の100cm以内である、請求項5に記載の耐腐食性及び表面品質に優れた合金めっき鋼材の製造方法。
- 前記亜鉛合金めっき浴の温度は440〜470℃であり、引込まれる素地鉄は、前記亜鉛合金めっき浴の温度よりも5〜30℃高い、請求項5に記載の耐腐食性及び表面品質に優れた合金めっき鋼材の製造方法。
- 前記素地鉄に対して前記浸漬前に600〜850℃の温度で熱処理を行う段階をさらに含む、請求項5に記載の耐腐食性及び表面品質に優れた合金めっき鋼材の製造方法。
- 前記冷却後に追加的に補助冷却する段階をさらに含む、請求項5に記載の耐腐食性及び表面品質に優れた合金めっき鋼材の製造方法。
- 前記補助冷却は、90体積%以上の窒素を含む冷却ガスを用いて行う、請求項10に記載の合金めっき鋼材の製造方法。
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PCT/KR2017/015331 WO2018117732A1 (ko) | 2016-12-22 | 2017-12-22 | 내부식성 및 표면 품질이 우수한 합금도금강재 및 그 제조방법 |
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JP2002285311A (ja) * | 2001-03-23 | 2002-10-03 | Sumitomo Metal Ind Ltd | 溶融Zn−Al−Mgめっき鋼板およびその製造方法 |
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US6465114B1 (en) * | 1999-05-24 | 2002-10-15 | Nippon Steel Corporation | -Zn coated steel material, ZN coated steel sheet and painted steel sheet excellent in corrosion resistance, and method of producing the same |
JP4683764B2 (ja) | 2001-05-14 | 2011-05-18 | 日新製鋼株式会社 | 耐食性に優れた溶融Zn−Al−Mg系合金めっき鋼材 |
JP2002348651A (ja) | 2001-05-22 | 2002-12-04 | Nisshin Steel Co Ltd | Mg含有溶融亜鉛基めっき鋼板の製造方法及び製造装置 |
KR100792746B1 (ko) * | 2001-09-27 | 2008-01-11 | 주식회사 포스코 | 용융아연도금강판 제조방법 |
US8785000B2 (en) | 2004-06-29 | 2014-07-22 | Tata Steel Ijmuiden B.V. | Steel sheet with hot dip galvanized zinc alloy coating and process to produce it |
JP5586007B2 (ja) | 2007-02-23 | 2014-09-10 | 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 | 冷間圧延されかつ連続的に焼きなましされた高強度鋼ストリップ及び該鋼の製造方法 |
WO2010130883A1 (fr) | 2009-05-14 | 2010-11-18 | Arcelormittal Investigacion Y Desarrollo Sl | Procede de fabrication d'une bande metallique revetue presentant un aspect ameliore |
JP2011157579A (ja) * | 2010-01-29 | 2011-08-18 | Nisshin Steel Co Ltd | 粗面化溶融Zn−Al−Mg合金めっき鋼板およびその製造方法、ならびに溶融Zn−Al−Mg合金めっき鋼板と熱可塑性樹脂成形体とが接合された複合体およびその製造方法 |
JP5649181B2 (ja) | 2011-08-09 | 2015-01-07 | Jfeスチール株式会社 | 耐食性に優れた溶融Zn−Al系合金めっき鋼板およびその製造方法 |
KR101528008B1 (ko) | 2012-10-23 | 2015-06-10 | 주식회사 포스코 | 표면품질 및 도금밀착성이 우수한 용융아연도금강판 및 이의 제조방법 |
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CN110100037A (zh) | 2019-08-06 |
KR20180073412A (ko) | 2018-07-02 |
WO2018117732A1 (ko) | 2018-06-28 |
MX2019007489A (es) | 2019-10-21 |
EP3561137A4 (en) | 2020-01-01 |
US11396691B2 (en) | 2022-07-26 |
KR101879093B1 (ko) | 2018-07-16 |
EP3561137A1 (en) | 2019-10-30 |
US20200377989A1 (en) | 2020-12-03 |
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