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Molten Al-Zn-Mg-Si-plated steel sheet and manufacturing method therefor

机译:镀铝锌锌镁硅的钢板及其制造方法

摘要

The purpose of the present invention is to provide a molten Al-Zn-Mg-Si-plated steel sheet having favorable corrosion resistance of the flat parts and edges and also having excellent machined part corrosion resistance. To achieve said purpose, the present invention is a molten Al-Zn-Mg-Si-plated steel sheet having a plated coating on the surface of a steel sheet and is characterized in that: the plated coating is obtained from an interfacial alloy layer present at the interface with the base steel sheet and a main layer present on said alloy layer; the coating contains 25-80 mass% of Al, greater than 0.6-15 mass% of Si, and greater than 0.1-25 mass% of Mg; and the content of Mg and Si in the plated coating satisfies formula (1). M
机译:本发明的目的是提供一种熔融Al-Zn-Mg-Si镀层钢板,其具有平坦部和边缘的良好的耐腐蚀性,并且还具有优异的机械加工部的耐腐蚀性。为了实现所述目的,本发明是在钢板表面上具有镀层的熔融Al-Zn-Mg-Si镀层钢板,其特征在于:所述镀层由存在的界面合金层获得。在与基础钢板和在所述合金层上存在的主层的界面处;所述涂层包含25-80质量%的Al,大于0.6-15质量%的Si和大于0.1-25质量%的Mg;镀层中的Mg和Si的含量满足式(1)。中号

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