JP6185084B2 - 特定の微細構造を有するZnAlMgコーティングの金属シート、および対応する生産方法 - Google Patents
特定の微細構造を有するZnAlMgコーティングの金属シート、および対応する生産方法 Download PDFInfo
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- JP6185084B2 JP6185084B2 JP2015556580A JP2015556580A JP6185084B2 JP 6185084 B2 JP6185084 B2 JP 6185084B2 JP 2015556580 A JP2015556580 A JP 2015556580A JP 2015556580 A JP2015556580 A JP 2015556580A JP 6185084 B2 JP6185084 B2 JP 6185084B2
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- 229910052751 metal Inorganic materials 0.000 title claims description 39
- 239000002184 metal Substances 0.000 title claims description 39
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 238000000576 coating method Methods 0.000 claims description 65
- 239000011248 coating agent Substances 0.000 claims description 57
- 239000011777 magnesium Substances 0.000 claims description 22
- 230000005496 eutectics Effects 0.000 claims description 21
- 239000000758 substrate Substances 0.000 claims description 20
- 230000001186 cumulative effect Effects 0.000 claims description 18
- 229910017706 MgZn Inorganic materials 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- 239000011159 matrix material Substances 0.000 claims description 13
- 210000001787 dendrite Anatomy 0.000 claims description 11
- 229910052749 magnesium Inorganic materials 0.000 claims description 11
- 239000003973 paint Substances 0.000 claims description 10
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 9
- 238000007711 solidification Methods 0.000 claims description 8
- 230000008023 solidification Effects 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 238000007654 immersion Methods 0.000 claims description 4
- 229910052684 Cerium Inorganic materials 0.000 claims description 3
- 229910052797 bismuth Inorganic materials 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000013078 crystal Substances 0.000 claims description 3
- 229910052746 lanthanum Inorganic materials 0.000 claims description 3
- 229910052745 lead Inorganic materials 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 229910052718 tin Inorganic materials 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000010791 quenching Methods 0.000 claims 1
- 230000000171 quenching effect Effects 0.000 claims 1
- 239000011701 zinc Substances 0.000 description 20
- 238000005260 corrosion Methods 0.000 description 14
- 230000007797 corrosion Effects 0.000 description 14
- 239000010410 layer Substances 0.000 description 9
- 230000032798 delamination Effects 0.000 description 8
- 238000000151 deposition Methods 0.000 description 6
- 238000004040 coloring Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- -1 aluminum-zinc-magnesium Chemical compound 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 1
- 229920001944 Plastisol Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229940075397 calomel Drugs 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical compound Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910052742 iron 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
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000005555 metalworking Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000004999 plastisol Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- C22C18/04—Alloys based on zinc with aluminium as the next major constituent
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Description
ここで、Tiは、ケルビン温度で表される。
Ti浸漬温度と、サンプルのtAlおよびtMgを変えることによって、本発明のサンプルシート1と、本発明ではないシートのサンプルを調製する。対応する微細構造を分析し、存在する構造および存在する構造の累積的な表面含有量を決定する。
本発明のシート1のサンプルおよび本発明ではないシートに層間剥離試験を行い、着色した状態で耐腐食性を測定する。
Claims (15)
- 金属シート(1)であって、AlおよびMgを含む金属コーティング(7)によってコーティングされる少なくとも1つの面(5)を有する基材(3)を備え、
金属コーティング(7)の残りの部分が、Zn、避けられない不純物、および場合によって含まれるSi、Sb、Pb、Ti、Ca、Mn、Sn、La、Ce、CrもしくはBiから選択される1つ以上のさらなる元素であり、金属コーティング(7)中のさらなる成分のそれぞれの重量基準での含有量は、0.3%未満であり、金属コーティング(7)は、重量基準でのアルミニウム含有量tAlが3.6%から3.8%であり、重量基準でのマグネシウム含有量tMgが2.7%から3.3%であり、
金属コーティング(7)は、Zn/Al/MgZn2の三元共晶の層状マトリックス(13)を含む微細構造を有し、
未加工の状態でコーティング(7)の外側表面(21)での累積的な表面含有量が無いかもしくは5.0%以下のZn樹枝状結晶(15)、
未加工の状態でコーティング(7)の外側表面(21)での累積的な表面含有量が無いかもしくは15.0%以下の二元共晶Zn/MgZn2花状部(17)、
未加工の状態でコーティング(7)の外側表面(21)での累積的な表面含有量が無いかもしくは1.0%未満の二元共晶Zn/Al樹枝状結晶、
未加工の状態でコーティング(7)の外側表面(21)での累積的な表面含有量が無いかもしくは1.0%未満のMgZn2島部を含む、金属シート。 - マグネシウム含有量tMgが、2.9%から3.1%である、請求項1に記載の金属シート。
- 重量比Al/(Al+Mg)が、0.45以上である、請求項1または2に記載の金属シート。
- 微細構造が、二元共晶Zn/Alの樹枝状結晶を含まない、請求項1から3のいずれか一項に記載の金属シート。
- 微細構造が、MgZn2の島部を含まない、請求項1から4のいずれか一項に記載の金属シート。
- 未加工の状態でコーティング(7)の外側表面(21)にある二元共晶Zn/MgZn2花状部(17)の累積的な表面含有量が、10.0%未満である、請求項1から5のいずれか一項に記載の金属シート。
- 未加工の状態でコーティング(7)の外側表面(21)にある二元共晶Zn/MgZn2花状部(17)の累積的な表面含有量が、5.0%未満である、請求項6に記載の金属シート。
- 未加工の状態でコーティング(7)の外側表面(21)にある二元共晶Zn/MgZn2花状部(17)の累積的な表面含有量が、3.0%未満である、請求項1から7のいずれか一項に記載の金属シート。
- 未加工の状態でコーティング(7)の外側表面(21)にあるZn樹枝状結晶(15)の累積的な表面含有量が、2.0%未満である、請求項8に記載の金属シート。
- 未加工の状態でコーティング(7)の外側表面(21)にあるZn樹枝状結晶(15)の累積的な表面含有量が、1.0%未満である、請求項9に記載の金属シート。
- 微細構造が、三元共晶(13)のみからなる、請求項10に記載の金属シート。
- 金属コーティング(7)が、少なくとも塗料層および/または油層で覆われている、請求項1から11のいずれか一項に記載の金属シート。
- 請求項1から12のいずれか一項に記載の金属シート(1)を製造する方法であって、
この方法が、少なくとも、
鋼鉄の基材(3)を与える工程と、
浴中で基材(3)を焼入れすることによって、少なくとも1つの面(5)に金属コーティング(7)を堆積させ、基材は、浴の入口での浸漬入口温度Tiが、
(2.34×tAl+0.655×tMg−10.1)×10−6≦exp(−10584/Ti)
であり、Tiがケルビン温度である工程と、
金属コーティング(7)を固化する工程とを含む、方法。 - 固化の開始と固化の終了の間のコーティング(7)の冷却速度が、15℃/s以上である、請求項13に記載の生産方法。
- 固化の開始と固化の終了の間のコーティング(7)の冷却速度が、20℃/s以上である、請求項14に記載の生産方法。
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