CN111511954B - 低温附着性和加工性优异的热浸镀锌钢板及其制造方法 - Google Patents

低温附着性和加工性优异的热浸镀锌钢板及其制造方法 Download PDF

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CN111511954B
CN111511954B CN201880083658.XA CN201880083658A CN111511954B CN 111511954 B CN111511954 B CN 111511954B CN 201880083658 A CN201880083658 A CN 201880083658A CN 111511954 B CN111511954 B CN 111511954B
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hot
steel sheet
layer
dip galvanized
galvanized steel
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CN111511954A (zh
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黄铉锡
金相宪
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Posco Holdings Inc
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Posco Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
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    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • 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
    • B32B15/012—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 aluminium or an aluminium alloy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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    • B32B15/043—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
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    • B32B15/18—Layered products comprising a layer of metal comprising iron or steel
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    • 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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Abstract

本发明的优选方面提供一种低温附着性和加工性优异的热浸镀锌钢板及其制造方法，所述热浸镀锌钢板包括：抑制层(inhibition layer)，形成在基础钢板上且包括Fe‑Al系金属间合金相；热浸镀锌层，形成在所述抑制层上；以及Al‑Mn系合金相，非连续地形成在所述抑制层与所述热浸镀锌层之间。

Description

低温附着性和加工性优异的热浸镀锌钢板及其制造方法
技术领域
本发明涉及一种用于家电产品和车辆用钢板等的热浸镀锌钢板及其制造方法，更具体地，涉及一种低温附着性和加工性优异的热浸镀锌钢板及其制造方法。
背景技术
热浸镀锌钢板作为在钢板上涂覆金属锌的产品，是通过锌的牺牲腐蚀保护提高耐蚀性的钢板。这种热浸镀锌钢板被广泛使用于家电产品和车辆用钢板等。
关于车辆用钢材，为了增强碰撞性能或代替焊接，在连接车辆部件时，使用结构用粘附剂的情况逐渐增加。
当使用粘附剂(密封剂)连接热浸镀锌钢板的两个部件时，普通的镀层在低温下受到冲击时会被剥离，从而产生低温接合脆性。在冬季相对长的北半球使用时，如果遇到冲击，这种现象会导致严重的安全问题。
并且，镀锌钢板的拉毛性差，该拉毛性是在冲压成型时镀层脱离基础铁而附着到模具上的现象。如果用这种钢板持续进行模具加工作业，则在产品表面引起划痕等缺陷，增加产品不良，由此可能降低作业的生产性和质量。
为了解决所述低温附着性问题，开发了一种增加镀层晶粒的平均尺寸的技术，但随着晶粒尺寸的增加，存在鲜映性和表面外观变差的问题。
另外，用于改善拉毛性的方法有镀层表面粗糙度调节技术、镀层表面润滑涂覆技术(专利文献1)，镀层晶粒细化技术(专利文献2)等。镀层晶粒细化作为在镀层上喷射液滴(liquid particle)来强制冷却的方法，通过细化镀层晶粒(锌花)能够使表面变得美观并改善拉毛性。但是，在镀锅上喷射液体的设备的运行复杂，镀覆钢板的表面会因液滴产生表面缺陷。并且，由于快速冷却导致的镀层的0001面取向增加，从而可能会使低温接合脆性进一步变差。
现有技术文献
(专利文献1)韩国公开专利公报第2013-0026122号
(专利文献2)韩国授权专利公报第0742832号
发明内容
(一)要解决的技术问题
本发明的一个优选方面的目的在于提供一种低温附着性和加工性优异的热浸镀锌钢板。
本发明的另一个优选方面的目的在于提供一种低温附着性和加工性优异的热浸镀锌钢板的制造方法。
(二)技术方案
根据本发明的一个方面的低温附着性和加工性优异的热浸镀锌钢板可以包括：抑制层，形成在基础钢板上且包括Fe-Al系金属间合金相；热浸镀锌层，形成在所述抑制层上；以及Al-Mn系合金相，非连续地形成在所述抑制层与所述热浸镀锌层之间。
其中，所述Al-Mn系合金相的面积率可以为抑制层表面的50％以下(0％除外)。
其中，所述Al-Mn系合金相的面积率可以为抑制层表面的20～40％。
其中，所述热浸镀锌层的硬度可以为85Hv以上。
其中，所述抑制层的厚度可以为1μm以下。
其中，所述热浸镀锌层的厚度可以为2～60μm。
根据本发明的另一个方面的低温附着性和加工性优异的热浸镀锌钢板的制造方法可以包括以下步骤：准备基础钢板；将所述基础钢板浸渍于温度为440～470℃且包含0.1～0.3重量％的Al和0.01～0.55重量％的Mn的热浸镀锌浴中并进行热浸镀锌；以及将如上所述已进行热浸镀锌的钢板以-20℃/s以上且小于-45℃/s的冷却速度进行冷却。
(三)有益效果
根据本发明的一个优选方面，可以提供一种镀锌钢板，通过镀层的锌生长方向(取向)不规则排列而减少低温接合脆性并提高镀层硬度，从而获得优异的拉毛性。
附图说明
图1是示出实施例的发明例2和比较例2、7的镀覆钢板的厚度方向上的截面的照片。
图2示出实施例的发明例2和比较例2、7的利用电子背向散射衍射(EBSD)的0001面的极像图(pole figure)。
图3是示出实施例的发明例1至3和比较例1至7的冲击剥离强度的图表。
最佳实施方式
本发明涉及一种低温附着性和加工性优异的热浸镀锌钢板及其制造方法。下面对本发明的优选实施例进行说明。本发明的实施例可以变更为多种方式，不能被解释为本发明的范围限定于以下说明的实施例。并且，本发明的实施例是为了向本发明所属技术领域的普通技术人员进一步详细地说明本发明而提供的。
下面，对本发明进行说明。
本发明提供一种低温附着性和加工性优异的热浸镀锌钢板及其制造方法，为了调节锌花的取向而在抑制层与镀层之间形成Al-Mn合金相，并在固化过程中抑制锌同样取向到0001面来改善低温接合脆性并提高镀层的硬度，从而提高加工性
尤其，本发明通过调节镀浴的组成和镀层(镀覆钢板)的冷却速度来提供附着性和加工性优异的热浸镀锌钢板及其制造方法。
首先，对根据本发明的一个优选方面的低温附着性和加工性优异的热浸镀锌钢板进行说明。
根据本发明的一个优选方面的低温附着性和加工性优异的热浸镀锌钢板包括：抑制层(inhibition layer)，形成在基础钢板上且包括Fe-Al系金属间合金相；热浸镀锌层，形成在所述抑制层上；以及Al-Mn系合金相，非连续地形成在所述抑制层与热浸镀锌层之间。
基础钢板
在本发明中，只要能够用作热浸镀锌钢板，则对基础钢板的种类不作限定。
抑制层
本发明的热浸镀锌钢板包括形成在基础钢板上且包括Fe-Al系金属间合金相的抑制层(inhibition layer)。所述抑制层(铝铁合金层)具有抑制锌的铁-锌合金化的同时，提高在常温下的锌与基础铁的附着性的作用。因此，抑制层表面在被铝-锰合金相覆盖规定比率以上时，在常温下的附着性会变差。
抑制层的厚度(附着量)会根据钢板的引入温度、镀浴的铝的浓度、浸渍时间等发生多种变化，但是，以镀层的截面为基准，所述抑制层的厚度优选为1μm(微米)以下，更优选为200nm～600nm。当所述抑制层的厚度为200nm以下时，有可能无法充分起到抑制Fe的合金化的作用，因此在镀层的界面发生部分的Zn-Fe合金化反应，当所述抑制层的厚度超过1μm时，在加工过程中易碎(Brittle)的抑制层会被断裂，从而发生镀层剥离等的问题。
热浸镀锌层
本发明的热浸镀锌钢板包括形成在所述抑制层上的热浸镀锌层。所述热浸镀锌层的硬度可以为85Hv以上。
热浸镀锌层的厚度(附着量)可以是2～60μm(微米)，更优选为4～50μm。当热浸镀锌层的厚度小于2μm时，锌无法充分发挥耐蚀性，当热浸镀锌层的厚度超过60μm时，由于用于镀层附着量的气刀有局限性，表面质量会变差，并且难以充分发挥通过本发明的铝-锰晶化物的镀覆取向的效果。
Al–Mn系合金相
本发明的热浸镀锌钢板包括非连续地形成在所述抑制层与热浸镀锌层之间的Al-Mn系合金相，所述Al-Mn系合金相的一部分可以位于镀层的晶界上。
为了使镀锌层的结晶方向随机取向，所述Al-Mn系合金相形成在抑制层上。当脆性破坏断裂机制主要在低温(-40℃)下起作用时，随机取向的镀锌层提高对脆性破坏的抵抗性，从而能够提高镀覆附着性。
优选地，所述Al-Mn系合金相直接在抑制层上非连续地形成，Al-Mn系合金相的面积率为抑制层表面的50％以下(0％除外)。用于提高所述Al-Mn系合金相的面积率超过抑制层表面的50％的镀层与基础铁的附着性的抑制层被合金相阻断，由此常温的镀覆附着性会变差。并且，当Al-Mn系合金相的面积率过小时，合金相对镀锌层取向的影响变小，由此对低温接合脆性的改善程度较弱。Al-Mn系合金相的面积率优选为抑制层表面的20～40％。
所述Al-Mn系合金相使镀锌层的生长方向随机取向，由此抑制低温下的脆性破坏，并且所述Al-Mn系合金相并非遮盖所有抑制层，因此可确保抑制层与镀锌层的附着力，从而在常温和低温下均具有优异的镀覆附着性。
下面，对根据本发明的另一个优选方面的低温附着性和加工性优异的热浸镀锌钢板的制造方法进行说明。
根据本发明的另一个优选方面的低温附着性和加工性优异的热浸镀锌钢板的制造方法包括以下步骤：准备基础钢板；将所述基础钢板浸渍于温度为440～470℃且包含0.1～0.3重量％的Al和0.01～0.55重量％的Mn的热浸镀锌浴中来进行热浸镀锌；以及将如上所述的已进行热浸镀锌的钢板以-20℃/秒(s)以上且小于-45℃/秒的冷却速度进行冷却。
准备基础钢板的步骤
在本发明中，只要能够用作热浸镀锌钢板，则对基础钢板的种类不作限定。在本发明中对准备基础钢板的步骤不作特别的限定，可以根据通常执行的工艺来执行。
所述准备基础钢板的步骤的一个例子为，可以对基础钢板进行脱脂和酸洗处理，以去除表面的异物或氧化膜。可以将已去除表面异物的钢板在还原性气氛下以4～7℃/秒的升温速度加热至750℃～850℃并保持20秒以上。所述还原性气氛可以是含有5％以上的氢的氮气氛。所述保持时间优选为20秒以上，若比所述时间短，基础钢板的恢复和再结晶无法充分进行，因此会发生材质不良和材质偏差，并且表面的氧化层无法被充分还原，因此镀覆性能会变差。
热浸镀锌步骤
将所述准备的基础钢板浸渍于温度为440～470℃且包含0.1～0.3重量％的Al和0.01～0.55重量％的Mn的热浸镀锌浴中来进行热浸镀锌。
热浸镀锌钢板通过连续镀覆工艺(CGL)制造，例如，通过将在750～850℃的退火炉中经过再结晶过程并在包含氢的还原气氛中还原的基础钢板浸渍于440～470℃的镀锌浴中的工艺来制造。
可以将所述基础钢板引入镀浴中之前冷却至450～500℃(引入温度)后，浸渍于镀浴中。当引入温度低时，镀层内抑制层的形成降低，附着性变差，当引入温度过高时，会促进镀浴中产生成浮渣，并产生表面缺陷。
当所述镀浴的温度小于440℃时，镀锌浴中的锰固溶度降低，因此可能产生浮渣，当所述镀浴的温度超过470℃时，锌的砷化氢(Ash)产生量增加，因此可能会产生镀覆表面质量缺陷。
当所述热浸镀锌浴中的Al含量过低时，难以形成抑制层，当所述热浸镀锌浴中的Al含量过高时，会产生大量的浮渣。因此，优选地，将所述热浸镀锌浴中的Al含量限定在0.1～0.3重量％。
所述热浸镀锌浴中的Mn是为了调节抑制层上的Al(铝)-Mn(锰)合金相的形成而添加的，当镀浴中的锰含量过低时，无法充分生成抑制层上的Al-Mn合金相，因此无法发挥预期效果，当镀浴的锰含量过高时，合金相过度地形成在抑制层上，由此会降低抑制层与镀锌层的附着力，并且超出固溶极限而在镀浴中产生浮渣，由此会阻碍表面质量。
因此，所述热浸镀锌浴中的Mn含量优选限定在0.01～0.55重量％。
当基础钢板浸渍于所述热浸镀锌浴中时，在基础钢板上形成包含Fe-Al系金属间合金相的抑制层(inhibition layer)。
冷却步骤
将如上所述进行热浸镀锌的钢板以-20℃/秒以上且小于-45℃/秒的冷却速度进行冷却。
通过气刀调节从热浸镀锌浴槽中出来的钢板上附着的锌的厚度(附着量)，在冷却台上对已调节附着量的镀覆钢板的液态锌进行固化，从而制造热浸镀锌钢板。当所述冷却速度小于-20℃/秒时，Al-Mn层没有形成在抑制层上，而是形成在镀层表面和内部，因此不会产生提高低温附着性的效果。另外，当所述冷却速度为-45℃/秒以上时，由于快速冷却，锌花变得微细，0002面生长的驱动力变强，因此锌花首先以垂直取向生长，从而低温附着力会变差。
因此，所述冷却速度优选限定在-20℃/秒以上且小于-45℃/秒。
可通过在冷却台上调节空气的流量来调节所述冷却速度。锌在所述冷却台上固化时出现锌特有的花纹形状，这就叫锌花。锌花是某一个结晶(grain)生长较大而使树枝状组织强烈发展时出现的形状，锌花越发展，晶界与晶界之间的镀层厚度的偏差就越大，因此发生拉毛性变差的倾向。
并且，在固化过程中，锌的优先生长方向为与钢板平行的0001面方向，大部分的结晶向一个方向排列。在常温和高温下，锌的破坏机制为脆性破坏、晶界破坏、延性破坏等的复合作用，而在低温下，当受冲击时，主要机制为沿0001面发生断裂的脆性破坏作用，结果产生镀层容易从基础铁剥离的低温接合脆性。
在本发明中，在将基础钢板浸渍于热浸镀锌浴槽中时，在基础钢板上形成包含Fe-Al系金属间合金相的抑制层，并且在基础钢板从热浸镀锌浴槽中出来并被冷却时，锌会固化而形成热浸镀锌层和Al-Mn系合金相。所述热浸镀锌层含有0.01～0.55重量％的Mn，在固化过程中热浸镀锌层所含有的Mn与Al反应，由此在抑制层与热浸镀锌层之间形成Al-Mn系合金相。
根据本发明的优选的热浸镀锌钢板的制造方法，可以一种制造热浸镀锌钢板，其包括：抑制层，形成在基础钢板上且包括Fe-Al系金属间合金相；热浸镀锌层，形成在所述抑制层上；以及Al-Mn系合金相，非连续地形成在所述抑制层与热浸镀锌层之间。所述热浸镀锌层的硬度可以是85Hv以上。
具体实施方式
下面，通过实施例对本发明进行更详细说明。
(实施例)
通过连续镀覆工艺(CGL)制造如下所述的热浸镀锌钢板。对基础钢板进行脱脂和酸洗处理来去除表面的异物，然后在含有5％的氢和95％的氮的还原性气氛中以4℃/秒的升温速度加热至810℃并保持30秒，然后冷却至480℃(引入温度)，接着将所述基础钢板浸渍于温度为460℃、Al的含量为0.2重量％、Mn的含量为如下表1所示的镀锌浴中并进行热浸镀锌，然后以如下表1所示的冷却速度冷却至400℃后进行空冷，从而制造热浸镀锌钢板。
对如上所述制造的热浸镀锌钢板测定Al-Mn合金相的形成与否和含量、冲击剥离强度、镀层是否剥离、镀层硬度和摩擦系数，并将其结果显示在表1中。
所述Al-Mn合金相的面积率(％)用合金相相对于抑制层的表面的面积比率表示。所述冲击剥离强度用于评价低温附着性，在-40℃通过冲击剥离测试(impact peel test)测定。所述镀层的硬度使用纳米压痕仪测定。所述摩擦系数用于评价加工性，在热浸镀锌钢板上涂布P-340N清洗用油并在施加5MPa的加压力的状态下以200mm/秒的速度旋转试片，将此时产生的拉拔力(drawing load)除以加压力的值表示所述摩擦系数，该测定所使用的试验设备是高速、高压旋转型连续摩擦系数测定装置，其工具(tool)的尺寸为18×28mm，并且在SKD11型材料上涂覆有铬。
另外，观察发明例2及比较例2和7的镀覆钢板的厚度方向的截面，并将其结果表示在图1中，针对发明例2及比较例2和7，使用EBSD测定0001面的极像图(pole figure)，并将其结果显示在图2中。另外，将发明例1至发明例3以及比较例1至比较例7的冲击剥离强度表示在图3中。
[表1]
Figure GDA0003527989820000091
比较例1至比较例3是在一般的锌浴中含有0.2重量％的铝且温度为460℃的镀浴中浸渍，然后经过气刀后直接将镀层的冷却速度调节为-15℃/s、-30℃/s和-45℃/s并冷却至400℃，然后进行了空冷。如上述表1和图3所示，比较例1至比较例3的摩擦系数均高，因此拉毛性差，并且冲击剥离强度为10N/mm以下，比较低，实际上剥离试片上的断裂面均出现在镀层上。如图1中所示，可以得知比较例2中未形成Al-Mn合金相。另外，可以从图2的EBSD结果中得知，在比较例2中镀层的生长方向集中在0001面。
发明例1至发明例3、比较例4和比较例5是为制造铝-锰合金相而在镀锌浴中添加0.2重量％的铝和0.2重量％的锰后调节镀层的冷却速度从而制造了镀覆钢板，镀锌层的锰在液态时固溶，但冷却过程中随着固溶度的下降，部分锌固溶在镀锌层上，部分变化成铝锰合金相。固溶的锰通过固溶强化效果将镀层的硬度提高到15％以上，使用连续摩擦系数测定器测定的表面摩擦系数也降低到0.116～0.127，从而改善了拉毛性。
根据锰含量为0.2重量％的发明例1至发明例3、比较例4和比较例5的冲击剥离(Impact peel)试验结果，可以得知冲击剥离强度(附着强度)均为10N/mm以上且冲击剥离强度优异。但是，破坏区域根据镀层的冷却速度而表现出不同的现象。
比较例4是以-15℃/s的冷却速度进行冷却的，在镀层上生成的铝锰合金相不仅生成在界面，而且还生成在镀层内部和表面，因此在抑制层上生成的比率小，由此没能使镀锌层的生长方向随机取向。其结果为，附着强度为10N/mm以上，但在极低温下的0001面中，脆性破坏机制仍为主要的破坏机制，因此断裂面形成在镀层与基础铁之间。
发明例1至3是在锰浓度为0.2重量％的镀浴中以-20℃/秒～-40℃/秒的镀层冷却速度进行冷却的，所生成的铝-锰合金相主要直接生成在抑制层上，合金相在抑制层上所占比率(面积率)为30～40％。这可以从图1中得知。
如发明例1至3，镀层与抑制层之间的铝锰合金相具有使镀层的生长方向随机取向从而在低温下抑制脆性破坏的效果。这从图2中也能够得知。另外，由于没有覆盖整个抑制层，从而确保了抑制层与锌层的附着力，因此在常温和低温下均显示优异的镀覆附着性。可以从表1和图3中显示的冲击剥离试验结果中得知，发明例1至发明例3的强度最优异，并且没有出现镀层剥离。观察发明例1至发明例3的被剥离试片的破坏部位，结果可确认到用于固定两个试片的粘合剂部分破坏，镀层与基础铁的界面或镀层内部没有发生剥离。
比较例5是以-45℃/s的镀层冷却速度进行了快速冷却，在这种快速冷却中，形成尺寸为30～50微米以下的微细的锌花。微细的锌花晶粒与抑制层上的锰合金相的接触概率降低，因此随机取向的0001面减少，垂直取向的0001面增加。另外，由于快速冷却，0001面的垂直生长驱动力变强，从而含有锰的镀浴的抗脆性破坏性也会变差。冲击剥离试验(附着力试验)结果为，附着强度为10N/mm以上，但由于脆性破坏而在基础铁与镀层之间发生剥离。
比较例6和比较例7中将锰的含量增加到0.6重量％且分别以-15℃/s和-30℃/s的冷却速度进行了实验，结果可以从示出比较例7的镀覆钢板厚度方向的截面照片的图1中得知，由于镀层的锰的比率高，在抑制层与镀层之间，锰合金相在抑制层上连续生成，因此可以从图2的EBSD结果中得知，虽然使镀层的生长方向随机排列，但抑制层与镀锌层的接触面积小，因此整体的附着力变差。这也导致在冲击实验中破坏部分出现在镀层与基础铁的界面。
如上所述，如图3所示，符合本发明的发明例1至发明例3的冲击剥离强度最优异，因此低温附着性卓越，并且如表1所示，不会发生镀层剥离，由于摩擦系数低，因此具有加工性优异的镀覆钢板的特性。

Claims (7)

1.一种低温附着性和加工性优异的热浸镀锌钢板，包括：
抑制层，形成在基础钢板上且包括Fe-Al系金属间合金相；
热浸镀锌层，形成在所述抑制层上；以及
Al-Mn系合金相，非连续地形成在所述抑制层与所述热浸镀锌层之间。
2.根据权利要求1所述的低温附着性和加工性优异的热浸镀锌钢板，其中，
所述Al-Mn系合金相的面积率为抑制层表面的50％以下且0％除外。
3.根据权利要求1所述的低温附着性和加工性优异的热浸镀锌钢板，其中，
所述Al-Mn系合金相的面积率为抑制层表面的20～40％。
4.根据权利要求1所述的低温附着性和加工性优异的热浸镀锌钢板，其中，
所述热浸镀锌层的硬度为85Hv以上。
5.根据权利要求1所述的低温附着性和加工性优异的热浸镀锌钢板，其中，
所述抑制层的厚度为1μm以下。
6.根据权利要求1所述的低温附着性和加工性优异的热浸镀锌钢板，其中，
所述热浸镀锌层的厚度为2～60μm。
7.一种低温附着性和加工性优异的热浸镀锌钢板的制造方法，包括以下步骤：
准备基础钢板；
将所述基础钢板浸渍于温度为440～470℃且包含0.1～0.3重量％的Al和0.01～0.55重量％的Mn的热浸镀锌浴中并进行热浸镀锌；以及
将已进行热浸镀锌的钢板以20℃/秒以上且小于45℃/秒的冷却速度进行冷却，冷却至400℃。
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120075260A (ko) * 2010-12-28 2012-07-06 주식회사 포스코 도금밀착성이 우수한 용융도금강판 및 그 제조방법
CN104975226A (zh) * 2015-07-30 2015-10-14 武汉钢铁(集团)公司 一种抗拉强度440MPa级的汽车用合金化热镀锌钢及生产方法
CN105369135A (zh) * 2015-12-22 2016-03-02 武汉钢铁(集团)公司 一种450MPa级轿车用镀锌双相钢及生产方法
KR101786377B1 (ko) * 2016-08-22 2017-10-18 주식회사 포스코 내골링성, 성형성 및 실러 접착성이 우수한 용융 아연도금 강판 및 그 제조방법

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7914851B2 (en) 2004-12-28 2011-03-29 Posco Method of manufacturing hot-dipped galvanized steel sheet
KR20090070509A (ko) 2007-12-27 2009-07-01 주식회사 포스코 고연성 및 고강도를 가지는 고망간 도금강판 및 그제조방법
KR101253919B1 (ko) 2011-09-05 2013-04-16 주식회사 유니코정밀화학 용융아연도금강판의 피막 형성용 코팅용액 조성물 및 그 피막이 형성된 용융아연도금강판
KR101951081B1 (ko) 2011-09-30 2019-02-21 신닛테츠스미킨 카부시키카이샤 용융 아연 도금 강판 및 그 제조 방법
KR101353701B1 (ko) * 2011-12-23 2014-01-21 주식회사 포스코 극저온 접합성이 우수한 용융아연도금강판 및 그 제조방법
DE102012013113A1 (de) 2012-06-22 2013-12-24 Salzgitter Flachstahl Gmbh Hochfester Mehrphasenstahl und Verfahren zur Herstellung eines Bandes aus diesem Stahl mit einer Mindestzugfestigkleit von 580MPa
KR101280719B1 (ko) 2012-12-12 2013-07-01 현대하이스코 주식회사 내열성이 우수한 핫스탬핑용 용융아연도금강판 제조 방법
JP5678951B2 (ja) * 2012-12-27 2015-03-04 Ｊｆｅスチール株式会社 溶融亜鉛めっき鋼板
KR101639843B1 (ko) 2013-12-24 2016-07-14 주식회사 포스코 열간 프레스 성형용 도금강판 및 그 제조방법
CN104099550A (zh) * 2014-06-27 2014-10-15 陕西理工学院 一种热浸镀Zn-Al-Mn合金的制备方法及热浸镀工艺
KR101630991B1 (ko) * 2014-12-23 2016-06-16 주식회사 포스코 용접성 및 내식성이 우수한 온간 프레스 성형용 도금강판, 성형부재, 및 그 제조방법
CN108431285A (zh) * 2015-12-22 2018-08-21 Posco公司 表面质量及抗低温脆性断裂性优异的热浸镀锌系钢板
KR101726090B1 (ko) 2015-12-22 2017-04-12 주식회사 포스코 표면품질 및 도금밀착성이 우수한 고강도 용융아연도금강판 및 그 제조방법
CN105908089B (zh) 2016-06-28 2019-11-22 宝山钢铁股份有限公司 一种热浸镀低密度钢及其制造方法
KR102010074B1 (ko) 2017-12-22 2019-08-12 주식회사 포스코 표면외관 및 성형성이 우수한 용융아연도금강판 및 그 제조방법

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120075260A (ko) * 2010-12-28 2012-07-06 주식회사 포스코 도금밀착성이 우수한 용융도금강판 및 그 제조방법
CN104975226A (zh) * 2015-07-30 2015-10-14 武汉钢铁(集团)公司 一种抗拉强度440MPa级的汽车用合金化热镀锌钢及生产方法
CN105369135A (zh) * 2015-12-22 2016-03-02 武汉钢铁(集团)公司 一种450MPa级轿车用镀锌双相钢及生产方法
KR101786377B1 (ko) * 2016-08-22 2017-10-18 주식회사 포스코 내골링성, 성형성 및 실러 접착성이 우수한 용융 아연도금 강판 및 그 제조방법

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