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    • 2. 发明专利
    • Electrogalvanized steel sheet for high image clarity coating substrate excellent in corrosion resistance after coating and enamel hair resistance, and method for producing the same
    • 用于涂层和ENAMEL HAIR电阻后耐腐蚀性好的高图像清晰度涂层基板的电化钢板及其制造方法
    • JP2013151734A
    • 2013-08-08
    • JP2012225881
    • 2012-10-11
    • Nippon Steel & Sumitomo Metal Corp新日鐵住金株式会社
    • YAMANAKA SHINTAROONO KOTAROUEDA MAKOTO
    • C25D5/26C22C18/00C23C8/10C23F1/30C23F17/00C25D3/56C25D5/48
    • PROBLEM TO BE SOLVED: To provide a highly corrosion resistant electrogalvanized steel sheet which has both corrosion resistance after coating and enamel hair resistance and can be used for home appliances, civil engineering and building, motor vehicles, and the like, and to provide a method for producing the same.SOLUTION: An electrogalvanized steel sheet has, on a surface of the steel sheet, a plated layer which contains, by mass%, 2% or more and 10% or less of Fe relative to the whole plated layer, with the balance consisting of Zn and inevitable impurities, and has an adhesion amount of 10 g/mor more and 70 g/mor less. The electrogalvanized steel sheet satisfies the following conditions that: the ratio of A/B is 1.1 or more and 3.0 or less, wherein the Fe content in the region from a surface layer of the plated layer to a depth of 1 μm is defined as A and the Fe content of the whole plated layer is defined as B; the arithmetic mean roughness Ra of the plated surface is 0.1 μm or more and 2 μm or less; and the average length RSm of the profile curve element in a roughness curve is 50 μm or more and 300 μm or less.
    • 要解决的问题:提供一种耐涂层耐腐蚀性和耐搪瓷发丝性的耐腐蚀性高的电镀锌钢板,可用于家用电器,土木工程和建筑物,机动车辆等,并提供一种方法 制造相同。电镀锌钢板在钢板表面上具有相对于整个镀层以质量%计含有2%以上且10%以下的Fe的镀层, 余量由Zn和不可避免的杂质构成,粘附量为10g / mor以上70g / mor以下。 电镀锌钢板满足以下条件:A / B的比例为1.1以上且3.0以下,其中,从镀层的表面层到1μm的深度的区域的Fe含量定义为A 整个镀层的Fe含量定义为B; 电镀面的算术平均粗糙度Ra为0.1μm以上且2μm以下; 粗糙度曲线中的轮廓曲线要素的平均长度RSm为50μm以上且300μm以下。
    • 4. 发明专利
    • Method for producing hot-dip galvanized steel sheet having excellent plating wettability and pickup resistance
    • 生产具有优异镀层耐湿性和耐烙印性的热镀锌钢板的方法
    • JP2013142198A
    • 2013-07-22
    • JP2012004555
    • 2012-01-13
    • Nippon Steel & Sumitomo Metal Corp新日鐵住金株式会社
    • FUJITA SOSHIYAMANAKA SHINTARO
    • C23C2/06C21D9/46C22C38/00C22C38/06C22C38/58C23C2/02C23C2/40
    • PROBLEM TO BE SOLVED: To provide a method for producing a hot-dip galvanized steel sheet having excellent plating wettability and pickup resistance using, as a base material, a steel sheet including Si and Mn which are easily oxidizable elements.SOLUTION: When a steel sheet having predetermined components is subjected to an annealing treatment and a treatment for applying a hot-dip galvanized layer in continuous hot dip galvanizing equipment, the steel sheet is heated up to a plate temperature T°C (200≤T≤500) within aseconds (10≤a≤500) in such a nitrogen atmosphere that the logarithm ratio of the steam partial pressure PHO to the hydrogen partial pressure PH, log(PHO/PH), is ≥-4 to ≤-2, in a first process, then heated up to T°C (600≤T≤1,000) from the plate temperature T°C within aseconds (20≤a≤1,000) in such a nitrogen atmosphere that log(PHO/PH) is ≥-1.5 to ≤+0.5, in a second process, and uniformly heated at a plate temperature T°C (-100≤T-T≤100) for aseconds (30≤a≤1,500) in such a nitrogen atmosphere that log(PHO/PH) is ≥-4 to ≤-2, in a third process.
    • 要解决的问题:提供一种使用易于氧化的元素的包含Si和Mn的钢板作为基材,提供具有优异的电镀润湿性和拾取电阻的热镀锌钢板的制造方法。解决方案:当钢 对具有规定成分的片材进行退火处理和在连续热浸镀锌设备中涂敷热镀锌层的处理,将钢板加热至板温度T℃(200≤T≤500) (10≤a≤500),在第一工序中,蒸汽分压PHO与氢分压PH(log(PHO / PH))的对数比为≥-4〜≤-2, 然后在对数(PHO / PH)≥-1.5〜≤+ 0.5的氮气氛中,从板温度T℃内升温至T℃(600≤T≤1,000) 在第二工序中,在板温度T℃(-100≤TT≤100)下均匀加热 在第三种处理中,在对数(PHO / PH)≥-4〜≤-2的氮气氛中的偏离(30≤a≤1,500)。