JP5505132B2 - 溶接性に優れたAl−Zn系合金めっき鋼材 - Google Patents
溶接性に優れたAl−Zn系合金めっき鋼材 Download PDFInfo
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- JP5505132B2 JP5505132B2 JP2010149155A JP2010149155A JP5505132B2 JP 5505132 B2 JP5505132 B2 JP 5505132B2 JP 2010149155 A JP2010149155 A JP 2010149155A JP 2010149155 A JP2010149155 A JP 2010149155A JP 5505132 B2 JP5505132 B2 JP 5505132B2
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- 229910000831 Steel Inorganic materials 0.000 title claims description 58
- 239000010959 steel Substances 0.000 title claims description 58
- 229910045601 alloy Inorganic materials 0.000 title claims description 15
- 239000000956 alloy Substances 0.000 title claims description 15
- 229910018137 Al-Zn Inorganic materials 0.000 title description 9
- 229910018573 Al—Zn Inorganic materials 0.000 title description 9
- 238000007747 plating Methods 0.000 claims description 152
- 239000000463 material Substances 0.000 claims description 43
- 229910052782 aluminium Inorganic materials 0.000 claims description 31
- 229910052742 iron Inorganic materials 0.000 claims description 28
- 229910052725 zinc Inorganic materials 0.000 claims description 27
- 229910052710 silicon Inorganic materials 0.000 claims description 21
- 238000001816 cooling Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000007598 dipping method Methods 0.000 claims description 5
- 229910017082 Fe-Si Inorganic materials 0.000 claims description 4
- 229910017133 Fe—Si Inorganic materials 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 160
- 239000011701 zinc Substances 0.000 description 58
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 52
- 238000005260 corrosion Methods 0.000 description 29
- 230000007797 corrosion Effects 0.000 description 29
- 238000003466 welding Methods 0.000 description 24
- 238000006243 chemical reaction Methods 0.000 description 15
- 239000002344 surface layer Substances 0.000 description 15
- 230000000694 effects Effects 0.000 description 10
- 239000011248 coating agent Substances 0.000 description 9
- 238000000576 coating method Methods 0.000 description 9
- 241001016380 Reseda luteola Species 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 8
- 238000007654 immersion Methods 0.000 description 8
- 238000009826 distribution Methods 0.000 description 7
- 238000001704 evaporation Methods 0.000 description 7
- 230000008020 evaporation Effects 0.000 description 7
- 229910001335 Galvanized steel Inorganic materials 0.000 description 6
- 239000008397 galvanized steel Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 238000005275 alloying Methods 0.000 description 4
- 238000009835 boiling Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
- 238000004070 electrodeposition Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000010422 painting Methods 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000008034 disappearance Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 229910000655 Killed steel Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- 229910007609 Zn—S Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000921 elemental analysis Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000007716 flux method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 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
- 230000026731 phosphorylation Effects 0.000 description 1
- 238000006366 phosphorylation reaction Methods 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 229910002059 quaternary alloy Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000550 scanning electron microscopy energy dispersive X-ray spectroscopy Methods 0.000 description 1
- 239000005413 snowmelt Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- -1 steel making method Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 1
- 229910000165 zinc phosphate Inorganic materials 0.000 description 1
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Description
(1)めっき層を有する鋼材であって、該めっき層が、質量%で、Zn:10〜30%、Si:0.5〜5%、Fe:20〜40%、残部はAlと不可避的不純物からなるAl−Zn−Fe−Si合金めっきであって、該めっき層が表面側にZn、Siが濃化した上層、鋼材側にFe、Alが濃化した下層を有する2層構造を有することを特徴とする合金めっき鋼材。
(2)前記上層のZn濃度が前記下層のZn濃度の3〜8倍であり、前記上層のSi濃度が前記下層のSi濃度の3〜8倍であり、前記下層のFe濃度が前記上層のFe濃度の3〜15倍であり、前記下層のAl濃度が前記上層のAl濃度の2〜80倍であることを特徴とする(1)に記載の合金めっき鋼材。
(3)前記めっき層中Siの50質量%以上が前記上層に含まれることを特徴とする(1)または(2)のいずれか一つに記載の合金めっき鋼材。
(4)(1)〜(3)いずれか1つに記載の合金めっき鋼材の製造方法であって、Al:30〜60質量%、Zn:40〜60質量%、Si:0.5〜5質量%及び不可避不純物からなる溶融めっき浴に鋼材を浸漬して前記鋼材の表面にAl−Zn−Fe−Si合金めっき層を形成し、その後前記鋼材を冷却する過程において、めっき浴温度から480℃までを5℃/秒未満の冷却速度で行うことを特徴とする合金めっき鋼材の製造方法。
Claims (4)
- めっき層を有する鋼材であって、該めっき層が、質量%で、Zn:10〜30%、Si:0.5〜5%、Fe:20〜40%、残部はAlと不可避的不純物からなるAl−Zn−Fe−Si合金めっきであって、該めっき層が、表面側にZn、Siが濃化した上層、鋼材側にFe、Alが濃化した下層を有する2層構造を有することを特徴とする合金めっき鋼材。
- 前記上層のZn濃度が前記下層のZn濃度の3〜8倍であり、前記上層のSi濃度が前記下層のSi濃度の3〜8倍であり、前記下層のFe濃度が前記上層のFe濃度の3〜15倍であり、前記下層のAl濃度が前記上層のAl濃度の2〜80倍であることを特徴とする請求項1記載の合金めっき鋼材。
- 前記めっき層中Siの50質量%以上が前記上層に含まれることを特徴とする請求項1または2に記載の合金めっき鋼材。
- 請求項1〜3のいずれか1項に記載の合金めっき鋼材の製造方法であって、Al:30〜60質量%、Zn:40〜60質量%、Si:0.5〜5質量%及び不可避不純物からなる溶融めっき浴に鋼材を浸漬して前記鋼材の表面にAl−Zn−Fe−Si合金めっき層を形成し、その後前記鋼材を冷却する過程において、めっき浴温度から480℃までを5℃/秒未満の冷却速度で行うことを特徴とする合金めっき鋼材の製造方法。
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KR102153164B1 (ko) | 2017-12-26 | 2020-09-07 | 주식회사 포스코 | 열간 프레스 성형용 도금강판 및 이를 이용한 성형부재 |
KR102153172B1 (ko) * | 2018-08-30 | 2020-09-07 | 주식회사 포스코 | 열간 성형성 및 내식성이 우수한 알루미늄-아연 합금 도금강판 및 그 제조방법 |
KR102307954B1 (ko) * | 2019-12-20 | 2021-09-30 | 주식회사 포스코 | 가공성 및 내식성이 우수한 알루미늄계 합금 도금강판 및 이의 제조방법 |
KR102311503B1 (ko) * | 2019-12-20 | 2021-10-13 | 주식회사 포스코 | 가공성 및 내식성이 우수한 알루미늄계 합금 도금강판 및 이의 제조방법 |
KR102311502B1 (ko) * | 2019-12-20 | 2021-10-13 | 주식회사 포스코 | 가공성 및 내식성이 우수한 알루미늄계 합금 도금강판 및 이의 제조방법 |
WO2023149586A1 (ko) * | 2022-02-03 | 2023-08-10 | 주식회사 포스코 | 표면 품질이 우수한 열간 프레스 성형용 도금 강판 및 이의 제조방법 |
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JPH0660376B2 (ja) * | 1990-07-03 | 1994-08-10 | 新日本製鐵株式会社 | 加工性に優れた溶融合金化亜鉛めっき鋼板及びその製造方法 |
JP2777571B2 (ja) * | 1991-11-29 | 1998-07-16 | 大同鋼板株式会社 | アルミニウム−亜鉛−シリコン合金めっき被覆物及びその製造方法 |
JPH11350164A (ja) * | 1998-06-11 | 1999-12-21 | Sumitomo Metal Ind Ltd | 溶融Zn−Al系合金めっき鋼板及びその製造方法 |
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