CN101128614A - 镀层钢板或钢带 - Google Patents
镀层钢板或钢带 Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 94
- 239000010959 steel Substances 0.000 title claims abstract description 94
- 239000011248 coating agent Substances 0.000 claims abstract description 60
- 238000000576 coating method Methods 0.000 claims abstract description 60
- 238000012360 testing method Methods 0.000 claims abstract description 20
- 239000011701 zinc Substances 0.000 claims abstract description 15
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 14
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000155 melt Substances 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 17
- 239000007921 spray Substances 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 150000003839 salts Chemical class 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 abstract description 12
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000003618 dip coating Methods 0.000 abstract description 3
- 238000005507 spraying Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract 1
- 230000035515 penetration Effects 0.000 abstract 1
- 239000011148 porous material Substances 0.000 abstract 1
- 230000003628 erosive effect Effects 0.000 description 8
- 239000011777 magnesium Substances 0.000 description 7
- 229910001335 Galvanized steel Inorganic materials 0.000 description 5
- 238000000137 annealing Methods 0.000 description 5
- 239000008397 galvanized steel Substances 0.000 description 5
- 239000004575 stone Substances 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 238000005246 galvanizing Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000003287 bathing Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- VYQRBKCKQCRYEE-UHFFFAOYSA-N ctk1a7239 Chemical compound C12=CC=CC=C2N2CC=CC3=NC=CC1=C32 VYQRBKCKQCRYEE-UHFFFAOYSA-N 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000005244 galvannealing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
- C23C2/0222—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating in a reactive atmosphere, e.g. oxidising or reducing atmosphere
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
- C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
- C23C2/18—Removing excess of molten coatings from elongated material
- C23C2/20—Strips; Plates
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/30—Fluxes or coverings on molten baths
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/38—Wires; Tubes
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
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- Coating With Molten Metal (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
本发明涉及一种镀层钢板或钢带，该镀层钢板或钢带具有由钢构成的底层，并通过热浸镀法在所述底层的至少一个上表面施加有锌镀层。就这种钢板或钢带而言，锌镀层会确保使其具有高度的耐腐蚀性。镀层越厚，这种耐腐蚀性越强。从而，在使用常规的合金化锌镀层的情况下，在根据DIN 50021对光亮的、未涂敷的样品进行的喷雾试验中，当镀层重量为25g/m2时，仅仅在24小时后就已产生红色铁锈；而当镀层重量为70g/m2时，仅仅在120小时后就产生红色铁锈。然而，现有技术为达到足够的耐腐蚀性所需的镀层厚度会引起与可焊性相关的问题。当采用激光焊接技术以高焊接速度在没有任何接缝间隙的搭接接头处产生在车体制造领域或家用工程领域尤其需要的那种焊透效果时，该可焊性问题尤其突出。通过这种焊接所产生的焊缝应当没有通孔，并且应当基本上无凹陷，而且不应有任何开孔。
Description
本发明涉及一种镀层钢板或钢带，该镀层钢板或钢带的底层由钢制成，并通过热浸镀锌法在该底层的至少一个上表面施加有锌镀层。
就此种钢板或钢带而言，锌镀层会确保使其具有高度的耐腐蚀性。镀层越厚，耐腐蚀性越强。从而，在使用常规的合金化锌镀层的情况下，在根据DIN 50021对光亮的、未涂漆的样品所进行的喷雾试验中，当镀层重量为25g/m2时，24小时后就已产生红色铁锈；而当镀层重量为70g/m2时，到120小时后才产生红色铁锈。
然而，现有技术为达到足够的耐腐蚀性所需的镀层厚度会引起与可焊性相关的问题。如果旨在通过激光焊接以高焊接速度在没有任何接缝间隙的搭接接头处产生焊透的效果(如，在机动车底盘制造领域或家用工程领域需要的那样)，则该可焊性问题尤其突出。通过这种焊接产生的焊缝应当没有通孔，并且应当基本上无凹陷，而且不应有任何开孔。
专利文献EP0038904B1中描述了一种用于制造耐腐蚀性得到增强、同时镀层重量得到降低的热浸镀锌钢板的可能的方法。根据这种现有技术，通过热浸镀锌法将含有0.2重量％的Al和0.5重量％的Mg的锌镀层施加于钢基底上。由于含有镁成分，结果，由这种方法获得的热浸镀锌钢带(每一面的镀层重量均为44g/m2)在涂漆状态下进行盐水喷雾试验时，在喷雾持续时间达2,000小时以上才开始有铁锈形成，其中，在上述盐水喷雾试验中，各个样品是在日本工业标准JIS Z 2371所规定的条件下被喷以NaCl溶液的。这种经过长时间才生锈的结果可归因于锌镀层和涂漆层的联合防腐蚀作用。
尽管根据专利文献EP0038904B1的方法会使镀层重量降低，同时获得良好的耐腐蚀性，但用此方法制得的热浸镀锌钢板在可焊性方面仍然无法满足机动车制造领域所提出的要求。
因此，本发明的目的是制造一种具有高耐腐蚀性和优异可焊性的最佳结合的平型钢制品，并且该钢制品尤其适合用作制造机动车底盘的材料或用作制备家用器具的材料。
根据本发明，通过如下的镀层钢板或钢带来达到该目的，这种镀层钢板或钢带具有由钢制成的底层，并通过热浸镀锌法在该底层的至少一个上表面施加有镀层，所述镀层由这样的熔融物形成：该熔融物由0.05-0.30重量％的Al、0.2-2.0重量％的Mg、以及余量的锌和不可避免的杂质构成，所述钢板或钢带每一面的镀层厚度最大为3.5μm且每一面的镀层重量最大为25g/m2，从而保证这种钢板在根据DIN50021-SS进行的盐水喷雾试验中开始形成红色铁锈的时间最早为250小时之后。
根据本发明的经热浸镀锌的平型钢制品具有出人意料的优异的耐腐蚀性，并且相对于现有技术而言，其镀层重量也达到最低(每一面的镀层重量最大为25g/m2)。低的镀层重量和与之相关的薄的镀层厚度(每一面最厚为3.5μm)，再加上优异的耐腐蚀性，使得本发明的钢板或钢带特别适合用于生产通过焊接单个的钢板元件来制造的部件。因此，在使用根据本发明制造的钢板的情况下，尤其可制造适合用于机动车底盘技术或家用器具技术的元件，这是因为可通过激光束焊接技术、以高的焊接速度和最佳的效果把由本发明的钢板或钢带形成的单个钢板部件经济地相互焊接在一起。
根据本发明的耐腐蚀性是基于短期腐蚀试验方法中的盐水喷雾试验(根据DIN 50021-SS)在光亮的、未涂漆的钢板上进行测定的，其中，在试验箱内，将作为腐蚀剂的中性5％NaCl溶液在35±2℃的温度下连续地进行喷雾。以使得钢板样品与水平方向成60°到75°角的状态将钢板样品置于试验箱内。按此方式进行的实际试验已表明，根据本发明镀层的钢板和钢带通常直至试验持续时间达300小时之后才显示有红色铁锈形成。
用于镀层目的的熔融物中的镁含量在镀层中基本保持不变。相反，在本发明的成品钢带中，镀层中的Al含量通常比熔融物中的Al含量要高1.8到3.2倍，并且尤其是是高2到3倍。当镀层中的Mg含量为0.4-1.0重量％，尤其是至少0.5重量％时，会达到最佳的防腐蚀效果。
如果旨在用镀锌退火法(galvanealed process)对钢基材料进行镀层，则熔融物优选含有低于0.15重量％的铝。在这种情况下，适用于标准操作的熔融物的Al含量为0.12重量％-0.14重量％。
相反，如果提供根据本发明的常规热浸镀锌钢板，则熔融物的Al含量优选为至少0.15重量％。
当对本发明的钢板或钢带涂漆时，另一出人意料的特性变得显而易见，该特性使得这种平型制品尤其适合用于底盘制造。所述特性为：在室温和-20℃下，对本发明的钢板或钢带在基于DIN EN ISO6860进行轴弯曲试验时显示出优良的涂漆附着能力。具体而言，在温度为-20℃下，未显示有涂漆的剥落或镀层从基底材料上剥落的迹象。
为了进行用于测定涂漆附着能力的试验，在实施碱洗和磷化处理后，向钢板样品上施加完整的涂漆结构，该结构具有厚度为20μm的阴极浸涂漆层、施于浸涂漆层上的厚度为32μm的填充涂漆层、和厚度为40μm的底涂层。对锥形轴进行的弯曲试验在室温或-20℃下没有导致任何漆层脱落。
本发明的钢板或钢带除了具有高度的耐腐蚀性和优良的涂漆附着能力以外，还具有显著优异的抗石击性(resistance to stone impact)。从而，在(例如)根据DIN 65996-1B进行的抗石击试验中可以表明：对于本发明的钢板，石击不会使任何镀层从底层上剥落。
为了制造本发明的钢板，在通常以60至150米/分钟的带速下工作的镀锌设备中对优质钢带进行连续的热浸镀锌处理。为了进行这一步，首先把待镀锌的钢板或钢带在炉内(如DFF炉(直接火焰炉)或者优选为RTF炉(辐射炉)内)退火。从该炉中出来后，使钢板或钢带穿过还原炉区，在该还原炉内，钢板或钢带被保持在含3.5-75％氢气的保护气氛下。在退火过程中所达到的温度处于720-850℃范围内。
随后在排空空气的条件下把按此方法退火的钢板或钢带经由被称为管嘴的部分输送到锌浴中，其中锌浴由如下的熔融物形成：该熔融物分别含有0.05-0.30重量％的Al、0.2-2.0重量％(特别是0.4-1.0重量％、0.5-1.0重量％)的Mg、以及余量的锌和不可避免的杂质。
在上述钢板或钢带离开熔融物浴后，采用原来已知的方法、通过刮料管嘴(stripper nozzle)将镀层的厚度限定为每一面最大为3.5μm的值，由此，对于根据本发明所获得的平型制品，其镀层重量被限定为每一面最重为25g/m2。
为了预防在熔融物浴上形成高比例的镀渣和金属间相，向该熔融物浴的表面上输送惰性气流可能是有利的。该惰性气流可来源于用于调节镀层厚度的刮料管嘴，或者可由独立的管嘴提供，其中，所述管嘴以雾状形式将惰性气体散布到熔融物浴的表面上。另一种可供选用的方法是，可将整个熔融物浴用其内封有惰性气体的密封罩围住。为达到此目的，尤其适合用作惰性气体的是氮气。
也可通过将熔融物浴温度调节为380-450℃来减少镀渣的形成。为了同样的目的，可将钢带的浸入温度限定为360-500℃，以便使钢带在浸没区域内发生氧化的倾向最小化。
在镀层钢带从熔融物浴中离开后，将其以至少10K/秒的冷却速度进行冷却。
如果需要，随后可通过在线轧制(轧制度为0.3-1.5％)对表面进行所需的纹理化。
如果还对上述镀层钢带以300-600℃的温度进行在线式后续加热，那么在ZnMg镀层内会发生重新分布、或者会产生全合金化(through-alloying)而形成ZnFeMg镀层。用于产生这种镀层的熔融物中的铝含量优选低于0.15重量％，特别是0.12-0.14重量％。
为了扩大应用范围，此后也可以通过原来已知的方法将薄膜层施加到上述镀层上。
本发明所达到的效果已基于下面的实验得到证实，在该实验中，首先对厚度为0.82mm的、由常规IF钢得到的硬轧钢带进行碱液喷洗、刷洗和电解清洗。
随后对所得钢带进行退火，在退火过程中，经过清洗的钢带在保护气体(5％H2，其余为N2)中被退火至800℃。退火时间为60秒。
随后把按此方法退火后的钢带冷却，使得该钢带以465℃的熔融物浴浸入温度浸入该熔融物浴中，该熔融物浴被装在密封罩内，并处于氧气浓度最大为10ppm的保护气氛下。熔融物浴由其中含有0.2重量％的Al和0.8重量％的Mg的锌熔融物、以及不可避免的杂质(例如，由钢带带入熔融物浴中的Fe成分)构成。浸渍时间为2秒。
在钢带被传送出熔融物浴之后、但仍处于熔融物浴密封罩中的条件下，通过刮料管嘴(同样布置在密封罩内)将该钢带两面上的镀层厚度调整为每一面的镀层厚度均为3μm(相当于每一面的镀层重量均为21g/m2)。刮料操作同样也是在氮气条件下进行的。
最后，对钢带进行修整。所得到的经熔融物浴镀层的钢带的Ra值为1.8μm，根据StahlEisen测试数据表SEP 1940测定的Pc值为46cm-1。
为了测定钢带镀层的附着性和可成形性，根据StahlEisen测试数据表SEP 1931对从镀层钢带成品中选出的样品进行落球冲击硬度试验。所得结果可归为一级，该等级对应于优良的附着性和同样优良的成形能力。
在深冲试验中，使用合适的模具由圆形钢板毛坯冲压出帽形部件，结果表现出很低的摩擦力值，该值最高为0.45g/m2。
对激光束焊缝的可焊性的评估在各情况下均取得良好的结果。由此，在(例如)以高达5m/分钟的焊接速度、接缝间隙为“0”的条件下进行激光束焊接时，达到了无误差的效果。
根据DIN 50021SS对按上述方法镀层的未涂漆的光亮样品进行的盐水喷雾试验表明，在喷雾持续312小时后才开始形成红色铁锈。而在钢板上具有常规Zn镀层(每一面的镀层重量均为25g/m2)的情况下，24小时后就已产生红色铁锈。
在基于DIN EN ISO 6860的锥形轴弯曲试验中，根据本发明镀层的样品上的涂漆附着性在室温和-20℃下均为良好。根据DIN55996-1B进行的抗石击试验也没有导致任何镀层从钢底层上剥落。
Claims (5)
1.一种镀层钢板或钢带，该镀层钢板或钢带具有由钢制成的底层，并通过热浸镀锌法在所述底层的至少一个上表面施加有镀层，所述镀层由熔融物形成，该熔融物由0.05-0.30重量％的Al、0.2-2.0重量％的Mg、以及余量的锌和不可避免的杂质构成，所述钢板或钢带每一面的镀层厚度最大为3.5μm，且每一面的镀层重量最大为25g/m2，从而保证所述钢板在根据DIN 50021-SS进行的盐水喷雾试验中开始形成红色铁锈的时间最早为250小时之后。
2.根据权利要求1所述的钢带，其特征在于所述镀层包含0.4重量％-1.0重量％的Mg。
3.根据权利要求2所述的钢板或钢带，其特征在于所述镀层包含大于0.5重量％的Mg。
4.根据上述权利要求中的任何一项所述的钢板或钢带，其特征在于所述熔融物的Al含量为0.12重量％-0.14重量％。
5.根据权利要求1至3中的任何一项所述的钢板或钢带，其特征在于所述熔融物的Al含量为至少0.15重量％。
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| EP05003762A EP1693477A1 (de) | 2005-02-22 | 2005-02-22 | Beschichtetes Stahlblech oder -band |
| EP05003762.1 | 2005-02-22 | ||
| PCT/EP2006/050955 WO2006089854A1 (de) | 2005-02-22 | 2006-02-15 | Beschichtetes stahlblech oder -band |
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| US (1) | US20080142125A1 (zh) |
| EP (2) | EP1693477A1 (zh) |
| JP (1) | JP5270172B2 (zh) |
| KR (1) | KR101268570B1 (zh) |
| CN (1) | CN101128614B (zh) |
| AU (1) | AU2006218005B2 (zh) |
| CA (1) | CA2596825C (zh) |
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| CN105008087A (zh) * | 2012-10-24 | 2015-10-28 | 麦格纳国际公司 | 机动车部件中的焊缝的激光金属沉积熔覆 |
| CN108018513A (zh) * | 2016-10-28 | 2018-05-11 | 宝山钢铁股份有限公司 | 一种热浸镀锌铝镁镀层钢板及其制造方法 |
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| IT1036986B (it) * | 1975-06-13 | 1979-10-30 | Centro Speriment Metallurg | Lega di acciaio e prodotti contale lega rivestiti |
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-
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- 2006-02-15 EP EP06724846.8A patent/EP1851352B8/de not_active Not-in-force
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619643B (zh) * | 2008-07-04 | 2012-09-26 | 沃尔沃汽车公司 | 包含具有改进的耐腐蚀性的金属结构总成的车辆 |
| CN105008087A (zh) * | 2012-10-24 | 2015-10-28 | 麦格纳国际公司 | 机动车部件中的焊缝的激光金属沉积熔覆 |
| CN108018513A (zh) * | 2016-10-28 | 2018-05-11 | 宝山钢铁股份有限公司 | 一种热浸镀锌铝镁镀层钢板及其制造方法 |
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| Publication number | Publication date |
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| US20080142125A1 (en) | 2008-06-19 |
| EP1851352A1 (de) | 2007-11-07 |
| KR20070105371A (ko) | 2007-10-30 |
| EP1851352B1 (de) | 2017-09-06 |
| EP1693477A1 (de) | 2006-08-23 |
| WO2006089854A1 (de) | 2006-08-31 |
| CN101128614B (zh) | 2012-07-18 |
| KR101268570B1 (ko) | 2013-05-28 |
| AU2006218005B2 (en) | 2011-11-17 |
| JP5270172B2 (ja) | 2013-08-21 |
| AU2006218005A1 (en) | 2006-08-31 |
| JP2008531844A (ja) | 2008-08-14 |
| EP1851352B8 (de) | 2017-10-18 |
| ES2650741T3 (es) | 2018-01-22 |
| CA2596825A1 (en) | 2006-08-31 |
| CA2596825C (en) | 2013-03-19 |
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