JP2023507960A - 表面品質と電気抵抗スポット溶接性に優れた高強度溶融亜鉛めっき鋼板及びその製造方法 - Google Patents
表面品質と電気抵抗スポット溶接性に優れた高強度溶融亜鉛めっき鋼板及びその製造方法 Download PDFInfo
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- galvanized steel
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Abstract
Description
スラブ加熱は、熱間圧延前に素材を加熱して圧延性を確保するために実施する。スラブ再加熱中、スラブ表層部は、炉内の酸素と結合して酸化物であるスケールを形成する。スケールを形成するとき、鋼中の炭素とも反応して一酸化炭素ガスを形成する脱炭反応を起こし、スラブ再加熱温度が高いほど脱炭量は増加する。スラブ再加熱温度が過度に高いと、脱炭層が過度に形成され、最終製品の材質が軟化する問題点があり、過度に低いと、熱間圧延性が確保できず、エッジクラックが発生する可能性があり、表層部の硬度を充分低くすることができないことから、LME改善が不十分になる。
仕上げ圧延開始温度が過度に高いと、表面熱延スケールが過度に発達し、最終製品のスケールに起因した表面欠陥の発生量が増加する可能性があるため、その上限を1,150℃に制限する。また、仕上げ圧延開始温度が900℃未満の場合、温度減少でバーの剛性が増加し、熱間圧延性が大きく減少する可能性があるため、上述した範囲に仕上げ圧延開始温度を制限することができる。
仕上げ圧延終了温度が1,050℃を超えると、仕上げ圧延中、デスケーリングで除去したスケールが再度表面に過度に形成され、表面欠陥の発生量が増加し、仕上げ圧延終了温度が850℃未満であると、熱間圧延性が低下するため、仕上げ圧延終了温度は、上述した範囲に制限することができる。
熱間圧延された鋼板は、以降、コイル形態に巻き取られて保管されるが、巻き取られた鋼板は徐冷過程を経るようになる。このような過程により鋼板の表層部に含まれた硬化性元素が除去されるが、熱延鋼板の巻き取り温度が過度に低い場合には、これらの元素の酸化除去に必要な温度よりも低い温度でコイルが徐冷されるため、十分な効果が得られ難い。
本発明の一実施形態では、エッジ部の表層部の硬度(a)と内部の硬度(b)の比率(a/b)値を調節するために、熱延コイルのエッジ部を加熱することもできる。熱延コイルのエッジ部の加熱とは、巻き取られたコイルの幅方向の両端部、すなわち、エッジ部を加熱することを意味するものであって、エッジ部の加熱により、エッジ部が酸化に適合した温度に先に加熱される。すなわち、本発明の一実施形態では、鋼板の表層の炭素や他の固溶された硬化能元素(Si、Mn、Al)を除去することで、表層部の硬度を減少させることができるが、このような過程は、鋼板表面を内部酸化させることにより行うことができる。ところが、巻き取られたコイルは、内部は高温に維持されるものの、エッジ部は相対的に速かに冷却され、これにより、内部酸化に適合した温度で維持される時間がエッジ部よりも短くなる。従って、幅方向の中心部に比べて、エッジ部での脱炭又は硬化能元素の除去が活発に行われなくなる。エッジ部の加熱は、エッジ部の硬化能元素を除去するための一つの方案として用いることができる。
上述した過程を経た熱延鋼板に対し、熱延スケールを除去するために、塩酸浴に投入して酸洗処理を実施する。酸洗の際、塩酸浴の塩酸濃度は10~30%の範囲で実施し、酸洗通板速度は180~250mpmで実施する。酸洗速度が250mpmを超える場合は、熱延鋼板表面のscaleが完全に除去されない可能性があり、酸洗速度が180mpmよりも低い場合、素地鉄の表層部が塩酸により腐食する可能性があるため、180mpm以上で実施する。
酸洗を実施した後、冷間圧延を実施する。冷間圧延の際、冷間圧下率は35~60%範囲で実施する。冷間圧下率が35%未満であると、特別な問題はないものの、焼鈍時に再結晶駆動力が足りないことから、微細組織を十分制御し難いことが発生する可能性がある。冷間圧下率が60%を超えると、熱延時に確保した軟質層の厚さが薄くなり、焼鈍後、鋼板表面20μm以内の領域内の硬度を十分低くし難い。
十分な生産性を確保するために、上記冷延鋼板の通板速度は40mpm以上である必要がある。ただし、通板速度が過度に速い場合には、材質確保の側面で不利になる可能性があるため、本発明の一実施形態では、上記通板速度の上限を130mpmに定めることができる。
適切な範囲の表層部の硬度値を得るために、焼鈍炉内の露点を制御することが有利である。露点が過度に低い場合には、内部酸化ではなく表面酸化が発生し、表面にSiやMnなどの酸化物が生成するおそれがある。これらの酸化物は、めっきに悪影響を及ぼす。従って、露点は-10℃以上に制御する必要がある。逆に、露点が過度に高い場合には、Feの酸化が発生するおそれがあるため、露点は30℃以下に制御する必要がある。このように露点制御のための温度は、十分な内部酸化の効果が現れる温度の650℃以上であることができる。ただし、温度が過度に高い場合には、Siなどの表面酸化物が形成されて、酸素が内部へ拡散することを妨害するだけでなく、亀裂帯加熱中にオーステナイトが過度に生じて炭素の拡散速度が低下し、それにより、内部酸化水準が減少する可能性があり、亀裂帯のオーステナイトの大きさが過度に成長して材質軟化を発生させる。また、焼鈍炉の負荷を発生させて設備の寿命を短縮させ、工程コストを増加させる問題点を引き起こす可能性があるため、上記露点を制御する温度は900℃以下であることができる。
焼鈍炉内の雰囲気は、窒素ガスに5~10Vol%の水素を投入して還元雰囲気を維持する。焼鈍炉内の水素濃度が5Vol%未満である場合、還元能力の低下により表面酸化物が過度に形成され、表面品質及びめっき密着性が劣位になり、表面酸化物が酸素と鋼中炭素との反応を抑制させて、脱炭量が低下し、LME改善水準が低くなる問題点が生じる。水素濃度が高い場合は特に問題点が生じないが、水素ガス使用量の増加による原価上昇、及び水素濃度の増加による炉内爆発危険性のため、水素濃度を制限する。
徐冷帯とは、冷却速度が3~5℃/sの区間をいうものであって、徐冷帯の温度が750℃を超えると、徐冷中に軟質のフェライトが過多に形成されて、引張強度が低下し、逆に、徐冷帯の温度が550℃未満であると、ベイナイトが過多に形成されるか又はマルテンサイトが形成されて、引張強度が過度に増加し、延伸率が減少する可能性がある。従って、徐冷帯の温度は、上述した範囲に制限することができる。
急冷帯とは、冷却速度が12~20℃/sの区間をいうものであって、急冷帯の温度が550℃を超えると、急冷中に適正水準以下のマルテンサイトが形成されて、引張強度が足りず、急冷帯の温度が270℃未満であると、マルテンサイトの形成が多すぎて延伸率が足りない可能性がある。
めっき浴中の鋼板の引込温度が低いと、鋼板と液相亜鉛との接触界面内の濡れ性が十分確保されないため、420℃以上を維持しなければならない。過度に高い場合、鋼板と液相亜鉛との反応が過度であることから界面にFe-Zn合金相であるゼタ(Zetta)相が生じて、めっき層の密着性が低下し、めっき浴中の鋼板のFe元素の溶出量が過度になり、めっき浴中にドロスが発生する問題点がある。従って、上記鋼板の引込温度は500℃以下に制限することもできる。
めっき浴中のAl濃度は、めっき層の濡れ性とめっき浴の流動性を確保するために、適正濃度が維持されなければならない。GAの場合は0.10~0.15%、GIは0.2~0.25%に制御することで、めっき浴中のドロス(dross)の形成を適正水準に維持し、めっき表面の品質と性能を確保することができる。
480℃未満では、Fe拡散量が少なく、合金化度が充分でないことからめっき物性が良好でない可能性があり、560℃を超える場合、過度な合金化によるパウダーリング(powdering)の問題が発生する可能性があり、残留オーステナイトのフェライト変態で材質が劣化する可能性があるため、合金化温度を上述した範囲に定める。
下記表1に記載された組成を有する鋼スラブ(表に記載されていない残りの成分は、Fe及び不可避不純物である。また、表において、BとNはppm単位で表示しており、残りの成分は重量%の単位で表示している)を1230℃に加熱し、仕上げ圧延開始温度と終了温度をそれぞれ980℃及び895℃にして熱間圧延した後、熱延コイルに対してエッジ部の加熱を実施し、その後、冷間圧延し、19.2体積%の塩酸溶液で酸洗した後に冷間圧延し、得られた冷延鋼板を焼鈍炉で焼鈍し、620℃の徐冷帯で4.2℃/sで徐冷し、315℃の急冷帯で17℃/sで急冷して、焼鈍された鋼板を得た。以降、得られた鋼板を470℃に加熱し、GAはAl0.13%のめっき浴に、GIはAlを0.24重量%含む456℃の亜鉛系めっき浴に浸漬して、溶融亜鉛めっきを実施した。得られた溶融亜鉛めっき鋼板に、必要に応じて、合金化(GA)熱処理を520℃で実施して、最終的に合金化溶融亜鉛めっき鋼板を得た。
Claims (11)
- 素地鋼板及び
前記素地鋼板の表面に形成された亜鉛系めっき層を含む亜鉛めっき鋼板であって、
前記素地鋼板の表層部の硬度(a)と内部の硬度(b)の比率(a/b)が0.95未満である、亜鉛めっき鋼板。 - 前記亜鉛系めっき層のめっき付着量は、30~70g/m2である、請求項1に記載の亜鉛めっき鋼板。
- 前記素地鋼板が、C:0.05~1.5%、Si:2.0%以下、Mn:1.0~30%、S-Al(酸可溶性アルミニウム):3%以下、Cr:2.5%以下、Mo:1%以下、B:0.005%以下、Nb:0.2%以下、Ti:0.2%以下、V:0.2%以下、Sb+Sn+Bi:0.1%以下、N:0.01%以下を含む組成を有する、請求項1又は請求項2に記載の亜鉛めっき鋼板。
- 前記素地鋼板の厚さは、1.0~2.0mmである、請求項3に記載の亜鉛めっき鋼板。
- 表層部が、Si、Mn、Al及びFeのうち少なくとも1種以上を含有する内部酸化物を含む、請求項1又は請求項2に記載の亜鉛めっき鋼板。
- 鋼スラブを950~1350℃の温度に加熱する段階;
前記鋼スラブを仕上げ圧延開始温度:900~1,150℃並びに仕上げ圧延終了温度:850~1,050℃の条件で熱間圧延して熱延鋼板を得る段階;
前記熱延鋼板を590~750℃の温度で巻き取る段階;
前記熱延鋼板を180~250mpmの通板速度で酸洗する段階;
前記熱延鋼板を35~60%の圧下率で冷間圧延して冷延鋼板を得る段階;
650~900℃で-10~30℃の露点の雰囲気で前記冷延鋼板を再結晶焼鈍する段階;及び
前記焼鈍された冷延鋼板を溶融亜鉛めっきする段階、
を含む、亜鉛めっき鋼板の製造方法。 - 前記再結晶焼鈍する段階は、水素(H2)を5~10体積%含む湿窒素ガス雰囲気で行われる、請求項6に記載の亜鉛めっき鋼板の製造方法。
- 前記再結晶焼鈍時の通板速度は、40~130mpmである、請求項6に記載の亜鉛めっき鋼板の製造方法。
- 前記焼鈍後の鋼板を550~750℃の温度まで3~5℃/sの冷却速度で徐冷する段階をさらに含む、請求項6に記載の亜鉛めっき鋼板の製造方法。
- 前記徐冷後の鋼板を270~550℃まで12~20℃/sの冷却速度で急冷する段階をさらに含む、請求項9に記載の亜鉛めっき鋼板の製造方法。
- めっき鋼板を480~560℃の温度で合金化する段階をさらに含む、請求項6~請求項9のいずれか一項に記載の亜鉛めっき鋼板の製造方法。
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Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61279311A (ja) * | 1985-06-05 | 1986-12-10 | Sumitomo Metal Ind Ltd | 熱延鋼板の酸洗方法 |
JPS6263687A (ja) * | 1985-09-12 | 1987-03-20 | Sumitomo Metal Ind Ltd | 熱延鋼鈑の酸洗方法 |
JP2014009399A (ja) * | 2012-07-03 | 2014-01-20 | Jfe Steel Corp | 高強度溶融亜鉛めっき鋼板およびその製造方法 |
JP2014122379A (ja) * | 2012-12-20 | 2014-07-03 | Nippon Steel & Sumitomo Metal | 耐酸性に優れた高強度鋼板及びその製造方法 |
WO2017145329A1 (ja) * | 2016-02-25 | 2017-08-31 | 新日鐵住金株式会社 | 耐衝撃剥離性および加工部耐食性に優れた高強度溶融亜鉛めっき鋼板 |
JP2019521257A (ja) * | 2016-06-28 | 2019-07-25 | 宝山鋼鉄股▲ふん▼有限公司Baoshan Iron & Steel Co.,Ltd. | 低密度溶融亜鉛めっき鋼及びその製造方法 |
JP2019532172A (ja) * | 2016-09-20 | 2019-11-07 | ティッセンクルップ スチール ヨーロッパ アクチェンゲゼルシャフトThyssenKrupp Steel Europe AG | 平鋼製品の製造方法および平鋼製品 |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2610948B2 (ja) | 1988-06-29 | 1997-05-14 | 川崎製鉄 株式会社 | スポット溶接性に優れた合金化溶融亜鉛めっき鋼板の製造方法 |
US5019460A (en) * | 1988-06-29 | 1991-05-28 | Kawasaki Steel Corporation | Galvannealed steel sheet having improved spot-weldability |
JP4486334B2 (ja) | 2003-09-30 | 2010-06-23 | 新日本製鐵株式会社 | 溶接性と延性に優れた高降伏比高強度熱延鋼板及び高降伏比高強度溶融亜鉛めっき鋼板、並びに、高降伏比高強度合金化溶融亜鉛めっき鋼板とその製造方法 |
JP4306497B2 (ja) | 2004-03-10 | 2009-08-05 | Jfeスチール株式会社 | 加工性および塗装後耐食性に優れる高強度冷延鋼板およびその製造方法 |
JP4781836B2 (ja) | 2006-02-08 | 2011-09-28 | 新日本製鐵株式会社 | 耐水素脆性に優れた超高強度鋼板とその製造方法及び超高強度溶融亜鉛めっき鋼板の製造方法並びに超高強度合金化溶融亜鉛めっき鋼板の製造方法 |
US7608155B2 (en) | 2006-09-27 | 2009-10-27 | Nucor Corporation | High strength, hot dip coated, dual phase, steel sheet and method of manufacturing same |
JP5223360B2 (ja) * | 2007-03-22 | 2013-06-26 | Jfeスチール株式会社 | 成形性に優れた高強度溶融亜鉛めっき鋼板およびその製造方法 |
US20130327452A1 (en) | 2010-09-30 | 2013-12-12 | Jfe Steel Corporation | High strength steel sheet and method for manufacturing the same |
JP5699860B2 (ja) | 2011-08-24 | 2015-04-15 | 新日鐵住金株式会社 | 溶融亜鉛めっき鋼板およびその製造方法 |
JP5862651B2 (ja) | 2013-12-18 | 2016-02-16 | Jfeスチール株式会社 | 耐衝撃性および曲げ加工性に優れた高強度溶融亜鉛めっき鋼板およびその製造方法 |
WO2015093043A1 (ja) | 2013-12-18 | 2015-06-25 | Jfeスチール株式会社 | 高強度溶融亜鉛めっき鋼板及びその製造方法 |
JP2015193907A (ja) * | 2014-03-28 | 2015-11-05 | 株式会社神戸製鋼所 | 加工性、および耐遅れ破壊特性に優れた高強度合金化溶融亜鉛めっき鋼板、並びにその製造方法 |
KR101923327B1 (ko) * | 2014-07-25 | 2018-11-28 | 제이에프이 스틸 가부시키가이샤 | 고강도 용융 아연 도금 강판 및 그 제조 방법 |
JP6524810B2 (ja) | 2015-06-15 | 2019-06-05 | 日本製鉄株式会社 | 耐スポット溶接部破断特性に優れた鋼板及びその製造方法 |
JP2017008367A (ja) | 2015-06-22 | 2017-01-12 | 株式会社神戸製鋼所 | 溶接性と成形性に優れた高強度溶融亜鉛めっき鋼板 |
KR101758485B1 (ko) | 2015-12-15 | 2017-07-17 | 주식회사 포스코 | 표면품질 및 점 용접성이 우수한 고강도 용융아연도금강판 및 그 제조방법 |
EP3584348A4 (en) | 2017-02-20 | 2020-08-05 | Nippon Steel Corporation | HIGH STRENGTH STEEL PLATE |
KR102065230B1 (ko) * | 2017-12-26 | 2020-01-10 | 주식회사 포스코 | 점 용접성이 우수한 초고강도 고망간 아연도금강판 및 그의 제조방법 |
-
2019
- 2019-12-20 KR KR1020190171690A patent/KR20210080670A/ko not_active Application Discontinuation
-
2020
- 2020-12-18 WO PCT/KR2020/018680 patent/WO2021125885A1/ko unknown
- 2020-12-18 US US17/787,174 patent/US12000008B2/en active Active
- 2020-12-18 EP EP20901647.6A patent/EP4079921A1/en active Pending
- 2020-12-18 CN CN202080088990.2A patent/CN114867886A/zh active Pending
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-
2022
- 2022-11-18 KR KR1020220155650A patent/KR20220163308A/ko active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61279311A (ja) * | 1985-06-05 | 1986-12-10 | Sumitomo Metal Ind Ltd | 熱延鋼板の酸洗方法 |
JPS6263687A (ja) * | 1985-09-12 | 1987-03-20 | Sumitomo Metal Ind Ltd | 熱延鋼鈑の酸洗方法 |
JP2014009399A (ja) * | 2012-07-03 | 2014-01-20 | Jfe Steel Corp | 高強度溶融亜鉛めっき鋼板およびその製造方法 |
JP2014122379A (ja) * | 2012-12-20 | 2014-07-03 | Nippon Steel & Sumitomo Metal | 耐酸性に優れた高強度鋼板及びその製造方法 |
WO2017145329A1 (ja) * | 2016-02-25 | 2017-08-31 | 新日鐵住金株式会社 | 耐衝撃剥離性および加工部耐食性に優れた高強度溶融亜鉛めっき鋼板 |
JP2019521257A (ja) * | 2016-06-28 | 2019-07-25 | 宝山鋼鉄股▲ふん▼有限公司Baoshan Iron & Steel Co.,Ltd. | 低密度溶融亜鉛めっき鋼及びその製造方法 |
JP2019532172A (ja) * | 2016-09-20 | 2019-11-07 | ティッセンクルップ スチール ヨーロッパ アクチェンゲゼルシャフトThyssenKrupp Steel Europe AG | 平鋼製品の製造方法および平鋼製品 |
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