CN110249069A - 镀敷密合性优异的高强度熔融镀敷钢板及其制造方法 - Google Patents

镀敷密合性优异的高强度熔融镀敷钢板及其制造方法 Download PDF

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Publication number
CN110249069A
CN110249069A CN201880008066.1A CN201880008066A CN110249069A CN 110249069 A CN110249069 A CN 110249069A CN 201880008066 A CN201880008066 A CN 201880008066A CN 110249069 A CN110249069 A CN 110249069A
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China
Prior art keywords
plating
less
melting
steel sheet
intensitive
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CN201880008066.1A
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Inventor
木庭正贵
伏胁祐介
长滝康伸
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JFE Steel Corp
JFE Engineering Corp
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NKK Corp
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Publication of CN110249069A publication Critical patent/CN110249069A/zh
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B32B15/013—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium
    • 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
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    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
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Abstract

本发明提供一种镀敷密合性优异的高强度熔融镀敷钢板及其制造方法。该镀敷密合性优异的高强度熔融镀敷钢板在钢板上具有镀敷层，且每一面的镀敷附着量为30～90g/m2，在镀敷层中含有0.3～1.5g/m2的剥离基础钢板，以质量％计，所述钢板的成分组成含有C：0.02％以上且0.30％以下、Si：0.01％以上且2.0％以下、Mn：0.2％以上且3.0％以下、P：0.08％以下、S：0.02％以下、Al：0.001％以上且0.40％以下，余量由Fe及不可避免的杂质构成。

Description

镀敷密合性优异的高强度熔融镀敷钢板及其制造方法
技术领域
本发明涉及以含有Si、Mn的高强度钢板为母材的镀敷密合性优异的高强度熔融镀敷钢板及其制造方法。
背景技术
目前，以汽车用钢板领域为中心，开始使用了对原材料钢板赋予了防锈性的表面处理钢板，其中，使用了防锈性优异的熔融镀锌钢板、合金化熔融镀锌钢板。但是，近年来，为了改善油耗、提高耐冲击特性，正在进行钢板的薄壁化、高强度化。
通常，将对钢坯进行了热轧、冷轧而成的钢板用作母材，将母材钢板在CGL的退火炉中进行再结晶退火，然后，进行熔融镀敷处理，制造熔融镀敷钢板。另外，可以在熔融镀敷后进一步进行合金化处理，制造合金化熔融镀敷钢板。
对于用于上述用途的熔融镀敷钢板而言，除了表面外观良好以外，能够耐受以扩孔加工为代表的严苛加工的镀敷密合性也是极为重要的。但是，含有作为易氧化元素的Si、Mn的熔融镀敷钢板在再结晶退火中会在钢表面形成Si及Mn氧化物，因此，不仅容易产生未镀敷、未进行合金化处理等的缺陷，而且镀敷密合性也会受损。
为了解决上述问题而提出了若干解决方案。例如，专利文献1中提出了一种通过在对钢板进行加热之前实施镀Ni，接着进行熔融镀敷处理，从而改善耐粉化性的方法。
在专利文献2中提出了一种改善镀敷被膜的密合性的方法，该方法包括：在磨削母材表面后，在还原性气体氛围中加热至600℃以上，将其冷却，进行熔融镀敷处理，接着进行合金化处理。
专利文献3中提出了一种合金化熔融镀锌钢板的制造方法，该方法包括：对热轧钢板或完成退火的冷轧钢板实施压下率为1.0～20％的轻压下，实施在520～650℃保持5秒钟以上的低温加热处理，浸渍于以质量％计含有Al：0.01～0.18％的熔融镀锌浴，接着进行合金化处理。
但是，专利文献1中提出的方法需要在加热前对母材表面实施镀Ni的工序。专利文献2中提出的方法需要进行磨削处理。由此，专利文献1、专利文献2均需要进行耗费成本和时间的处理，因此，存在导致生产性降低的问题。
另外，对于专利文献3中提出的方法而言，无法在目前的高强度钢板中获得与要求的高强度、加工性对应的足够高水平的镀敷密合性，未必有助于加工部的耐腐蚀性。
现有技术文献
专利文献
专利文献1：日本特开2010－196146号公报
专利文献2：日本特开平10－81948号公报
专利文献3：日本特开2002－317257号公报
发明内容
发明要解决的课题
本发明是鉴于上述情况而完成的，其目的在于提供一种镀敷密合性优异的高强度熔融镀敷钢板及其制造方法。
用于解决问题的方法
本发明人等为了解决上述课题而进行了深入研究。其结果发现，通过使镀敷层中含有剥离基础钢板，可以得到镀敷密合性优异的高强度熔融镀敷钢板。
本发明基于上述的见解，其特征如下。
[1]一种镀敷密合性优异的高强度熔融镀敷钢板，其在钢板上具有镀敷层，且每一面的镀敷附着量为30～90g/m2，在该镀敷层中含有0.3～1.5g/m2的剥离基础钢板，
以质量％计，所述钢板的成分组成含有C：0.02％以上且0.30％以下、Si：0.01％以上且2.0％以下、Mn：0.2％以上且3.0％以下、P：0.08％以下、S：0.02％以下、Al：0.001％以上且0.40％以下，余量由Fe及不可避免的杂质构成。
[2]根据上述[1]所述的镀敷密合性优异的高强度熔融镀敷钢板，其中，作为成分组成，以质量％计，进一步含有以下元素中的一种或两种以上：
Ti：0.01％以上且0.40％以下、Nb：0.001％以上且0.200％以下、V：0.001％以上且0.500％以下、Mo：0.01％以上且0.50％以下、W：0.001％以上且0.200％以下、B：0.0003％以上且0.01％以下。
[3]一种镀敷密合性优异的高强度熔融镀敷钢板的制造方法，该方法包括：对具有上述[1]或[2]所述的成分组成的钢坯进行热轧，以1～10％的压下率轧制，进行酸洗，接着以0.3～5％的压下率轧制，进行熔融镀敷处理。
[4]根据上述[3]所述的镀敷密合性优异的高强度熔融镀敷钢板的制造方法，其中，在所述热轧中，在粗轧后以820℃以上的精轧温度结束了轧制，然后，以450～650℃的卷取温度进行卷取。
[5]根据上述[3]或[4]所述的镀敷密合性优异的高强度熔融镀敷钢板的制造方法，其中，在以0.3～5％的压下率进行所述轧制之后、且在所述熔融镀敷处理之前，在氢浓度为2～30体积％且露点为-60～-10℃的炉内气体氛围中、以钢板到达温度为600～950℃进行连续退火。
[6]根据上述[3]～[5]中任一项所述的镀敷密合性优异的高强度熔融镀敷钢板的制造方法，其中，在所述熔融镀敷处理后进一步进行合金化处理。
需要说明的是，本发明的高强度熔融镀敷钢板是拉伸强度(TS)为590MPa以上的钢板，包括以热轧钢板或冷轧钢板为母材进行熔融镀敷处理的钢板、和在进行了熔融镀敷处理后进一步进行合金化处理的钢板中的任意钢板。另外，作为镀敷，以镀Zn、镀Zn-Al、镀Al等镀敷作为对象。
发明的效果
根据本发明，可以得到镀敷密合性优异的高强度熔融镀敷钢板。由于在加工后也具有高耐腐蚀性，因此对具有复杂成型的部件的制造是有效的，通过本发明获得的工业上的效果很大。
附图说明
图1是表示合金化熔融镀锌钢板中的剥离基础钢板的状态的图。
具体实施方式
以下，对本发明进行具体说明。
需要说明的是，在以下的说明中，钢成分组成的各元素含量的单位及镀敷的成分组成的各元素含量的单位均为“质量％”，在没有特别说明时，仅以“％”表示。另外，氢浓度的单位均为“体积％”，在没有特别说明时，仅以“％”表示。
本发明的镀敷密合性优异的高强度熔融镀敷钢板的特征在于，在钢板上具有每一面的镀敷附着量为30～90g/m2的镀敷层，且在镀敷层中含有0.3～1.5g/m2的剥离基础钢板，以质量％计，所述钢板含有C：0.02％以上且0.30％以下、Si：0.01％以上且2.0％以下、Mn：0.2％以上且3.0％以下、P：0.08％以下、S：0.02％以下、Al：0.001％以上且0.40％以下，余量由Fe及不可避免的杂质构成。即，本发明的特征在于，通过在镀敷层中导入剥离基础钢板，防止加工中产生的镀敷层内的裂纹的进展，提高镀敷密合性。根据以上的结果，可得到镀敷密合性优异的高强度熔融镀敷钢板。
首先，对本发明的作为对象的镀敷密合性优异的高强度熔融镀敷钢板的成分组成的限定原因进行说明。
C：0.02％以上且0.30％以下
C(碳)越少母材的成型性越好，但通过含有C，可廉价地提高钢板的强度。因此，将C含量设为0.02％以上，优选为0.04％以上。另一方面，如果使其过量地含有C，则钢板的韧性、焊接性降低，因此将C含量设为0.30％以下，优选为0.20％以下。
Si：0.01％以上且2.0％以下
Si(硅)作为固溶强化元素是有效的，为了提高钢板的强度，需要为0.01％以上。然而，由于在过量含有Si时，熔融镀敷时的润湿性受损，合金化反应性受损，因此合金化的调整变得困难，导致镀敷外观、镀敷密合性的降低。由此，将Si含量设为0.01％以上且2.0％以下。
Mn：0.2％以上且3.0％以下
Mn(锰)是对提高钢的强度有用的元素。为了获得该效果，需要含有0.2％以上的Mn。然而，由于在过量含有Mn时，熔融镀敷时的润湿性受损，合金化反应性受损，因此合金化的调整变得困难，导致镀敷外观、镀敷密合性的降低。由此，将Mn含量设为0.2％以上且3.0％以下，优选为0.3％以上且2.6％以下。
P：0.08％以下
当含有超过0.08％的P(磷)时，焊接性变差，并且表面品质变差。另外，在合金化处理时，如果不较高地设定合金化处理温度，则无法得到希望的合金化度，但在使合金化处理温度升高时，母材钢板的延展性变差，同时合金化熔融镀敷层的密合性变差。因此，P含量设为0.08％以下。
S：0.02％以下
对于S(硫)而言，在于晶界发生偏析或大量生成MnS的情况下，会使韧性降低，因此需要将含量设为0.02％以下。因此，将S含量设为0.02％以下。S含量的下限没有特别限定，可以为杂质的程度。
Al：0.001％以上且0.40％以下
Al(铝)是为了钢液的脱氧而添加的，但在其含量低于0.001％的情况下，无法实现该目的。另一方面，如果含量超过0.40％，则大量生成夹杂物，成为钢板缺陷的原因。因此，Al含量为0.001％以上且0.40％以下。
余量为Fe及不可避免的杂质。
在本发明中，为了下述为目的，以质量％计，可以含有进一步含有以下元素中的一种或两种以上：Ti：0.01％以上且0.40％以下、Nb：0.001％以上且0.200％以下、V：0.001％以上且0.500％以下、Mo：0.01％以上且0.50％以下、W：0.001％以上且0.200％以下、B：0.0003％以上且0.01％以下。
Ti(钛)、Nb(铌)、V(钒)、Mo(钼)、W(钨)及B(硼)是用于使析出物(特别是碳化物)在母材钢板中析出的必要元素，优选添加选自这些元素中的一种或两种以上。通常，这些元素在母材钢板中多以包含这些元素的析出物的形式含有。
在这些元素中，特别是从析出强化能力强、成本的观点考虑，Ti是有效的元素。然而，在添加量低于0.01％的情况下，为了使合金化熔融镀敷层中含有析出物(特别是碳化物)所需要的母材钢板中的析出物量有时不足。另一方面，如果超过0.40％，则其效果饱和，成本增高。因此，在含有Ti的情况下，Ti含量为0.01％以上且0.40％以下。
需要说明的是，对于Nb、V、Mo、W及B而言，基于与上述Ti的含有范围的上限及下限相关的相同理由，在含有的情况下，Nb含量为0.001％以上且0.200％以下，V含量为0.001％以上且0.500％以下，Mo含量为0.01％以上且0.50％以下，W含量为0.001％以上且0.200％以下，B含量为0.0003％以上且0.01％以下。
接下来，对镀敷层进行说明。
镀敷层的每一面镀敷附着量为30～90g/m2。如果附着量低于30g/m2，则难以确保耐腐蚀性。另一方面，如果超过90g/m2，则耐镀敷剥离性变差。
另外，使镀敷层中含有剥离基础钢板在本发明中是重要的要件。通过使镀敷层中含有剥离基础钢板，能够防止加工中产生的镀敷层内裂纹的进展。在熔融镀敷的情况下，基础钢板发生剥离，由此，镀敷层与基础钢板的界面变得不平滑。可以认为其结果是，在镀敷层与基础钢板的界面裂缝不容易发展，密合性提高。另外，在合金化镀敷层的情况下，例如，对于合金化熔融镀锌而言，一般认为裂缝在Γ相与δ相的界面或其相内发展，但通过含有剥离的基础钢板、即通过在脆性的合金镀敷层中存在软质的基础钢板，可以抑制裂缝。
镀敷层中含有的剥离基础钢板为0.3～1.5g/m2。如果剥离基础钢板含量比0.3g/m2少，则不能期待提高镀敷密合性的效果。另一方面，如果含量超过1.5g/m2，则导致镀敷附着量的波动，外观变差。
需要说明的是，剥离基础钢板(剥离的基础钢板)是指，相当于图1所示的实线包围的部分，从基础钢板剥离而完全分离，且被导入至镀敷层内的部分。
剥离基础钢板可以通过后述的实施例的方法对含量进行测定。
接下来，对本发明的镀敷密合性优异的高强度熔融镀敷钢板的制造方法进行说明。
对具有上述成分组成的钢坯进行热轧，以1～10％的压下率轧制，进行酸洗，接着以0.3～5％的压下率轧制，进行熔融镀敷处理。优选在热轧中，在粗轧后以820℃以上的精轧温度结束了轧制，然后以450～650℃的卷取温度进行卷取。另外，优选在以0.3～5％的压下率轧制之后、且在熔融镀敷处理之前，在氢浓度为2～30体积％且露点为-60～-10℃的炉内气体氛围中、以600～950℃的钢板到达温度进行连续退火。另外，在熔融镀敷处理后，可以进一步进行合金化处理。在本发明中，在酸洗前后进行轧制是重要的要件。对于在酸洗前后进行酸洗时的具体条件，在后面说明。
热轧
热轧开始温度(钢坯加热温度)(优选条件)
为了进行Ti、Nb等的微细析出的分散，需要在进行热轧前使Ti、Nb等暂时溶解于钢板中。因此，热轧前的加热温度(钢坯加热温度)优选为1100℃以上。另一方面，在加热到超过1300℃的情况下，促进钢表层的内部氧化，存在表面性状变差的隐患。因此，热轧前的钢坯加热温度优选为1100℃以上且1300℃以下。
精轧温度(优选条件)
为了减小热轧时的变形阻力，使操作容易，优选将精轧温度设为820℃以上。另一方面，在超过1000℃进行精轧时，容易产生氧化皮缺陷，有时表面性状变差。因此，将精轧温度设为820℃以上，更优选设为820℃以上且1000℃以下，更优选为850℃以上且950℃以下。
热轧卷取温度(优选条件)
本发明的钢板含有以Si、Mn、Ti为代表的易氧化元素。因此，为了抑制钢板的过度氧化、确保良好的表面性状，卷取温度优选为650℃以下。另一方面，在卷取温度低于450℃的情况下，容易产生因冷却不均导致的卷材性状不良，因此，可能损害生产性。因此，热轧卷取温度优选为450℃以上且650℃以下，优选为450℃以上且600℃以下。
热轧卷取之后、酸洗之前进行1～10％的压下率的轧制
由热轧/热轧卷取工序得到的热轧钢板通过酸洗实施脱氧化皮，然后，实施轧制。酸洗没有特别限定，可以使用通常的方法。这里，在本发明中，在酸洗的前一阶段实施轧制。在酸洗的前一阶段实施轧制是本发明中重要的要件。通过在酸洗的前一阶段实施轧制，利用氧化皮按压进行对钢板表面赋予适度的凹凸，促进向镀敷层内导入剥离的基础钢板。压下率为1～10％。在压下率低于1％的情况下，未能充分进行对钢板表面赋予凹凸，无法获得足够的改善镀敷密合性的效果。另一方面，在压下率超过10％的情况下，氧化皮咬入基础钢板，脱氧化皮性显著降低。
酸洗后进行0.3～5％的压下率的轧制
在本发明中，在酸洗后实施0.3～5％的压下率的轧制。在酸洗后实施0.3～5％的压下率的轧制在本发明中是重要的要件。通过施加压下了进行表面形状的控制及对母材表面导入残余应力。通过将压下率设为0.3％以上，残余应力的导入变得充分，可以改善钢板表面的镀敷反应性。压下率超过5％时，不仅应变导入带来的镀敷反应性的改善效果饱和，而且钢板表面平滑化，难以在镀敷层内导入剥离基础钢板。
退火(优选条件)
优选在0.3～5％的压下率的轧制之后、且熔融镀敷处理之前进行退火。优选条件为氢浓度2～30体积％且露点-60～-10℃的炉内气体氛围、600～950℃的钢板到达温度。在退火到达温度低于600℃的情况下，酸洗后的氧化膜未被完全还原，有时无法获得希望的镀敷特性。另外，在高于950℃的温度下，Si、Mn等发生表面富集，存在镀敷性变差的隐患。更优选钢板到达温度为650℃以上且850℃以下。
优选将炉内气体氛围设为氢浓度2～30％且露点-60～-10℃。炉内气体氛围只要为还原性即可，优选为露点-60～-10℃、氢浓度2～30％、并且余量非活性气体构成的气体氛围。如果露点高于-10℃，则在钢板表面生成的Si氧化物的形态容易成为膜状。更优选露点为-20℃以下。另一方面，低于-60℃的露点在工业上难以实现。在氢浓度低于2％的情况下，还原性弱。在30％以下时，可得到足够的还原能力。更优选氢浓度为5％以上且20％以下。
熔融镀敷处理
在连续熔融镀敷线上，优选在对钢板进行还原退火之后，使用熔融镀敷浴实施熔融镀敷处理。
对于熔融镀敷浴的组成而言，例如，在熔融镀锌处理的情况下，设为Al浓度0.01～0.25％的范围，使余量为Zn及不可避免的杂质。在Al浓度低于0.01％的情况下，镀敷处理时发生Zn-Fe合金化反应，在镀敷与钢板(母材)的界面生成脆的合金层，镀敷密合性变差。在Al浓度超过0.25％时，Fe-Al合金层的生长变得明显，损害镀敷密合性。镀敷浴温度不需要特别限定，可以为通常操作范围的440℃以上且480℃以下。
合金化处理(优选条件)
如果合金化处理温度超过550℃，则在合金化处理时，在钢板(母材)与镀敷被膜的界面明显生成硬质且脆的Γ相，表面粗糙度增大，并且耐粉化性变差，因此，合金化处理温度优选为550℃以下，更优选为530℃以下。另一方面，在合金化处理温度低于480℃时，未能充分进行合金化，无法获得足够的镀敷特性。因此，合金化处理温度优选为480℃以上。
从成本、控制上的问题考虑，优选将合金化处理时间设为10秒钟以上且60秒钟以下，更优选为40秒钟以下。
合金化处理的加热方法不需要特别限定，可以为辐射加热、通电加热、高频感应加热等公知的任意方法。在实施合金化处理后，冷却至常温。镀敷后的后处理不需要特别限定，可以实施基于调质轧制的材质调整、基于矫平等的平坦形状调整、以及根据需要实施的铬酸盐处理等通常进行的后处理。
实施例
以下，基于实施例对本发明进行具体说明，但本发明并不限定于本实施例。
使用具有表1所示的成分组成的钢坯，在通常的铸造后，在表2所示的条件下进行热轧、轧制、酸洗、轧制、退火、熔融镀锌处理，并进一步对一部分进行合金化处理。
在实施熔融镀锌处理时，在镀锌浴温度为460℃下进行，通过擦拭将附着量调整为50g/m2。在合金化温度为520℃下实施合金化处理。
镀锌层中的剥离基础钢板的量
对于镀锌层中的剥离基础钢板的量，使用ICP发射光谱分析法按照以下步骤进行了测定。首先，通过用添加了缓蚀剂的稀盐酸溶解镀锌层，仅将镀敷钢板中的镀锌层剥离/溶解。缓蚀剂是为了防止基础钢板的过度溶解而使用的添加剂，可以是市售的缓蚀剂。在本发明中，将朝日化学工业株式会社制造的盐酸酸洗用腐蚀抑制剂“IBIT No.700BK”添加至稀释至10～100倍的盐酸中，使其为0.6g/L的浓度。在稀盐酸中溶解镀敷钢板之后，对包含未溶解的剥离基础钢板的溶液进行提取，将其分成两份溶液。其中，对一份溶液在剥离基础钢板未溶解的状态下进行组成分析，对另一份溶液用未添加缓蚀剂的盐酸进行再溶解，然后进行组成分析。将这样得到的结果的差值作为剥离基础钢板的量。
对以上得到的熔融镀锌钢板进行下述所示的试验，测定拉伸强度，对镀敷表面外观及镀敷密合性进行了评价。测定方法及评价基准如下。
拉伸强度(TS)
从熔融镀锌钢板(GI)或合金化熔融镀锌钢板(GA)上沿相对于轧制方向为直角的方向采集JIS5号拉伸试验片(JISZ2201)，进行应变速度为10-3/s的JIS Z2241所规定的拉伸试验，求出了TS。
外观性
对熔融镀敷后及合金化处理后的外观进行肉眼观察，将没有未镀敷、合金不均的情况评价为○，将有未镀敷、合金不均的情况评价为×。
镀敷密合性
通过钢球碰撞试验对熔融镀锌钢板的镀敷密合性进行了评价。在球重量2.8kg、落下高度1m的条件下，进行钢球碰撞试验，对加工部进行胶带剥离，对镀敷层有无剥离进行肉眼观察判定。
○镀敷层无剥离
×镀敷层剥离
耐粉化性
通过对耐粉化性进行试验，对合金化熔融镀锌钢板的镀敷密合性进行了评价。将透明胶带贴于合金化熔融镀敷钢板，对胶带面实施90度弯曲、弯曲复原，将胶带剥离。以利用荧光X射线测定的Zn计数的形式，对于从附着于剥离后的胶带的钢板上每10mm×40mm弯曲复原部剥离下的镀敷量进行了测定，按照下述基准进行了评价。
根据表2，本发明例的表面外观、镀敷密合性(耐粉化性)均良好。另一方面，在比较例中，表面外观、镀敷密合性(耐粉化性)中的任意一者以上差。
工业实用性
本发明的高强度熔融镀敷钢板可以优选用作近年来高强度化、薄壁化快速发展的汽车构件。

Claims (6)

1.一种镀敷密合性优异的高强度熔融镀敷钢板，其在钢板上具有镀敷层，且每一面的镀敷附着量为30～90g/m2，在该镀敷层中含有0.3～1.5g/m2的剥离基础钢板，
以质量％计，所述钢板的成分组成含有：
C：0.02％以上且0.30％以下、
Si：0.01％以上且2.0％以下、
Mn：0.2％以上且3.0％以下、
P：0.08％以下、
S：0.02％以下、
Al：0.001％以上且0.40％以下，
余量由Fe及不可避免的杂质构成。
2.根据权利要求1所述的镀敷密合性优异的高强度熔融镀敷钢板，其中，作为成分组成，以质量％计，进一步含有以下元素中的一种或两种以上：
Ti：0.01％以上且0.40％以下、
Nb：0.001％以上且0.200％以下、
V：0.001％以上且0.500％以下、
Mo：0.01％以上且0.50％以下、
W：0.001％以上且0.200％以下、
B：0.0003％以上且0.01％以下。
3.一种镀敷密合性优异的高强度熔融镀敷钢板的制造方法，该方法包括：
对具有权利要求1或2所述的成分组成的钢坯进行热轧，以1～10％的压下率轧制，进行酸洗，接着以0.3～5％的压下率轧制，进行熔融镀敷处理。
4.根据权利要求3所述的镀敷密合性优异的高强度熔融镀敷钢板的制造方法，其中，在所述热轧中，在粗轧后以820℃以上的精轧温度结束了轧制，然后，以450～650℃的卷取温度进行卷取。
5.根据权利要求3或4所述的镀敷密合性优异的高强度熔融镀敷钢板的制造方法，其中，在以0.3～5％的压下率进行所述轧制之后、且在所述熔融镀敷处理之前，在氢浓度为2～30体积％且露点为-60～-10℃的炉内气体氛围中、以钢板到达温度为600～950℃进行连续退火。
6.根据权利要求3～5中任一项所述的镀敷密合性优异的高强度熔融镀敷钢板的制造方法，其中，在所述熔融镀敷处理后进一步进行合金化处理。
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6309762B1 (en) * 1997-05-08 2001-10-30 Conforma Clad Replaceable wear resistant surfaces
CN102341521A (zh) * 2009-05-27 2012-02-01 新日本制铁株式会社 疲劳特性、延伸率以及碰撞特性优良的高强度钢板、热浸镀钢板、合金化热浸镀钢板以及它们的制造方法
CN104411857A (zh) * 2012-06-25 2015-03-11 杰富意钢铁株式会社 抗粉化性优良的合金化热镀锌钢板
WO2016013145A1 (ja) * 2014-07-25 2016-01-28 Ｊｆｅスチール株式会社 高強度溶融亜鉛めっき鋼板およびその製造方法
CN108474092A (zh) * 2015-12-25 2018-08-31 杰富意钢铁株式会社 高强度熔融镀敷热轧钢板及其制造方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3132406B2 (ja) 1996-02-22 2001-02-05 住友金属工業株式会社 合金化溶融亜鉛めっき鋼板とその製造方法
JP4313912B2 (ja) * 1999-11-08 2009-08-12 Ｊｆｅスチール株式会社 深絞り性に優れた高強度溶融亜鉛めっき鋼板の製造方法
JP2002317257A (ja) 2001-04-19 2002-10-31 Sumitomo Metal Ind Ltd 合金化溶融亜鉛めっき鋼板およびその製造方法
JP2003003216A (ja) * 2001-06-21 2003-01-08 Kawasaki Steel Corp 深絞り性および耐２次加工脆性に優れた高強度溶融亜鉛めっき鋼板の製造方法
JP2009013488A (ja) * 2007-07-09 2009-01-22 Jfe Steel Kk 高張力冷延鋼板およびその製造方法
JP5245914B2 (ja) 2009-02-27 2013-07-24 新日鐵住金株式会社 加工性に優れた合金化溶融亜鉛めっき鋼板の製造方法
JP5434375B2 (ja) * 2009-08-27 2014-03-05 Ｊｆｅスチール株式会社 加工性に優れる高強度溶融亜鉛めっき鋼板およびその製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6309762B1 (en) * 1997-05-08 2001-10-30 Conforma Clad Replaceable wear resistant surfaces
CN102341521A (zh) * 2009-05-27 2012-02-01 新日本制铁株式会社 疲劳特性、延伸率以及碰撞特性优良的高强度钢板、热浸镀钢板、合金化热浸镀钢板以及它们的制造方法
CN104411857A (zh) * 2012-06-25 2015-03-11 杰富意钢铁株式会社 抗粉化性优良的合金化热镀锌钢板
WO2016013145A1 (ja) * 2014-07-25 2016-01-28 Ｊｆｅスチール株式会社 高強度溶融亜鉛めっき鋼板およびその製造方法
CN108474092A (zh) * 2015-12-25 2018-08-31 杰富意钢铁株式会社 高强度熔融镀敷热轧钢板及其制造方法

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