JP2015500925A - 極低温接合性に優れた溶融亜鉛めっき鋼板及びその製造方法 - Google Patents
極低温接合性に優れた溶融亜鉛めっき鋼板及びその製造方法 Download PDFInfo
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- JP2015500925A JP2015500925A JP2014548664A JP2014548664A JP2015500925A JP 2015500925 A JP2015500925 A JP 2015500925A JP 2014548664 A JP2014548664 A JP 2014548664A JP 2014548664 A JP2014548664 A JP 2014548664A JP 2015500925 A JP2015500925 A JP 2015500925A
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- 229910001335 Galvanized steel Inorganic materials 0.000 title claims abstract description 50
- 239000008397 galvanized steel Substances 0.000 title claims abstract description 50
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 78
- 239000010959 steel Substances 0.000 claims abstract description 78
- 239000002131 composite material Substances 0.000 claims abstract description 33
- 229910052723 transition metal Inorganic materials 0.000 claims abstract description 30
- 150000003624 transition metals Chemical class 0.000 claims abstract description 30
- 239000013078 crystal Substances 0.000 claims abstract description 21
- 229910000765 intermetallic Inorganic materials 0.000 claims abstract description 4
- 238000007747 plating Methods 0.000 claims description 56
- 230000001629 suppression Effects 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 17
- 238000005246 galvanizing Methods 0.000 claims description 16
- 239000011701 zinc Substances 0.000 claims description 14
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 8
- 229910052725 zinc Inorganic materials 0.000 claims description 8
- 238000009713 electroplating Methods 0.000 claims description 5
- 230000005764 inhibitory process Effects 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 238000005238 degreasing Methods 0.000 claims description 4
- 238000005554 pickling Methods 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 238000011282 treatment Methods 0.000 claims description 3
- 239000008151 electrolyte solution Substances 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 238000005304 joining Methods 0.000 claims 1
- 239000000155 melt Substances 0.000 claims 1
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 23
- 239000002585 base Substances 0.000 description 23
- 230000000052 comparative effect Effects 0.000 description 12
- 238000012360 testing method Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical group N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
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- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
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- Y10T428/12431—Foil or filament smaller than 6 mils
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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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Abstract
Description
通常のIF鋼を冷延し、アルカリ脱脂及び酸洗い処理により清浄化した後、60℃、pH5の条件で20Aの電流を印加して、鋼板の表面に遷移金属の一つであるFe電気めっきを行った。このときの、Feめっき量は、下表1の通りである。上記Feめっき後、5%H2−N2、−40℃露点雰囲気下で、焼鈍熱処理して保持した後、500℃まで冷却した。
Claims (16)
- 素地鋼板と、
前記素地鋼板上に形成され、遷移金属を含む複合層と、
前記複合層上に形成され、Fe−Al系金属間化合物を含む抑制層(inhibition layer)と、
前記抑制層上に形成されている亜鉛めっき層と、を含み、
前記亜鉛めっき層の結晶粒(spangle)の平均直径が150μm以下である、極低温接合性に優れた溶融亜鉛めっき鋼板。 - 前記複合層は、Feと遷移金属の和が50〜90重量%、Alが10〜30重量%、残りは不可避な不純物を含む、請求項1に記載の極低温接合性に優れた溶融亜鉛めっき鋼板。
- 前記複合層は、前記抑制層及び素地鋼板と整合関係を有する、請求項1に記載の極低温接合性に優れた溶融亜鉛めっき鋼板。
- 前記複合層は、立方(cubic)構造である、請求項1に記載の極低温接合性に優れた溶融亜鉛めっき鋼板。
- 前記複合層の厚さは、80nm以上である、請求項1に記載の極低温接合性に優れた溶融亜鉛めっき鋼板。
- 鋼板を用意する段階と、
前記鋼板に遷移金属をめっきする段階と、
前記遷移金属がめっきされた鋼板を熱処理して熱処理された鋼板を製造する段階と、
前記熱処理した鋼板を冷却する段階と、
前記冷却した鋼板を溶融亜鉛めっき浴に浸漬して亜鉛めっき鋼板を製造する段階と、
前記亜鉛めっき鋼板を冷却する段階と、
を含む、極低温接合性に優れた溶融亜鉛めっき鋼板の製造方法。 - 前記鋼板を用意する段階は、脱脂及び酸洗い処理を行うことを含む、請求項6に記載の極低温接合性に優れた溶融亜鉛めっき鋼板の製造方法。
- 前記遷移金属は、Fe、Co及びNiのうちの1種以上である、請求項6に記載の極低温接合性に優れた溶融亜鉛めっき鋼板の製造方法。
- 前記遷移金属としてFeがめっきされ、FeSO4・7H2O及び(NH4)2SO4が含まれた電解液で電気めっきを行う、請求項8に記載の極低温接合性に優れた溶融亜鉛めっき鋼板の製造方法。
- 前記遷移金属めっきは、350mg/m2以上のめっき量で行う、請求項6に記載の極低温接合性に優れた溶融亜鉛めっき鋼板の製造方法。
- 前記熱処理は、還元性雰囲気下、1.5〜6℃/sの昇温速度で、750〜900℃まで加熱し、20秒以上保持する、請求項6に記載の極低温接合性に優れた溶融亜鉛めっき鋼板の製造方法。
- 前記熱処理した鋼板の冷却は、450〜500℃まで行う、請求項6に記載の極低温接合性に優れた溶融亜鉛めっき鋼板の製造方法。
- 前記溶融亜鉛めっきは、Alが0.1〜0.3wt%含まれた430〜480℃のめっき浴に、2.5〜8秒間、鋼板を浸漬して行う、請求項6に記載の極低温接合性に優れた溶融亜鉛めっき鋼板の製造方法。
- 前記溶融亜鉛めっきされた鋼板の冷却は、−20℃/s以下の冷却速度で行う、請求項6に記載の極低温接合性に優れた溶融亜鉛めっき鋼板の製造方法。
- 前記溶融亜鉛めっき鋼板の素地鋼板及び抑制層の間に優れた界面密着力を有する複合層を形成するために、前記遷移金属をめっきする、請求項6に記載の極低温接合性に優れた溶融亜鉛めっき鋼板の製造方法。
- 前記溶融亜鉛めっき鋼板のめっき層の結晶粒(spangle)の平均直径が150μm以下となるように前記溶融亜鉛めっきされた鋼板を冷却する、請求項6に記載の極低温接合性に優れた溶融亜鉛めっき鋼板の製造方法。
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WO2022097732A1 (ja) * | 2020-11-06 | 2022-05-12 | Jfeスチール株式会社 | Fe系電気めっき鋼板,電着塗装鋼板,自動車部品,電着塗装鋼板の製造方法,及びFe系電気めっき鋼板の製造方法 |
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WO2022097733A1 (ja) * | 2020-11-06 | 2022-05-12 | Jfeスチール株式会社 | 合金化亜鉛めっき鋼板,電着塗装鋼板,自動車部品,電着塗装鋼板の製造方法,及び合金化亜鉛めっき鋼板の製造方法 |
JP7323063B2 (ja) | 2020-11-06 | 2023-08-08 | Jfeスチール株式会社 | 合金化亜鉛めっき鋼板,電着塗装鋼板,自動車部品,電着塗装鋼板の製造方法,及び合金化亜鉛めっき鋼板の製造方法 |
JP7323062B2 (ja) | 2020-11-06 | 2023-08-08 | Jfeスチール株式会社 | Fe系電気めっき鋼板,電着塗装鋼板,自動車部品,電着塗装鋼板の製造方法,及びFe系電気めっき鋼板の製造方法 |
JP7323064B2 (ja) | 2020-11-06 | 2023-08-08 | Jfeスチール株式会社 | 亜鉛めっき鋼板,電着塗装鋼板,自動車部品,電着塗装鋼板の製造方法,及び亜鉛めっき鋼板の製造方法 |
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