Alloy-coated steel sheet and manufacturing method thereof
A technology of alloy coating and manufacturing method, which is applied in the field of alloy coated steel plate and its manufacturing, and can solve the problems of weak anti-corrosion properties and the like
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no. 1 approach
[0088] figure 2 is a schematic diagram of an alloy-coated steel sheet according to a first embodiment of the present invention. if refer to figure 2 To illustrate, the alloy-coated steel sheet of the first embodiment of the present invention manufactured according to the manufacturing method may include: a steel sheet 21; and an Al-Mg-Si alloy layer 23 on the steel sheet 21; the Al-Mg -Si alloy layer 23 may be in the form of including Mg—Si alloy particles 25 in an alloy layer composed of Al—Mg alloy phase 24 .
[0089] The Al-Mg-Si alloy layer 23 may be in a form including a mixed structure in which the Mg-Si alloy particles 25 are surrounded by the Al-Mg alloy phase 24 .
[0090] The alloy-coated steel sheet is produced by coating magnesium on a hot-dip aluminum-coated steel sheet by a physical vapor deposition method, so it can produce an Al-Mg-Si coating with a higher magnesium content than the original hot-dip plating method. When manufacturing Al-Mg-Si coated steel ...
no. 2 approach
[0101] image 3 It is a schematic diagram of an alloy-coated steel sheet according to a second embodiment of the present invention. if refer to image 3 To illustrate, the alloy-coated steel sheet of the second embodiment of the present invention manufactured according to the manufacturing method may include: a steel sheet 21; an Al-Si alloy layer 26 on the steel sheet; and an Al-Si alloy layer 26 on the steel sheet. The Al-Mg-Si alloy layer 23 on the upper surface; the Al-Mg-Si alloy layer 23 may be in the form of including Mg-Si alloy particles 25 in the alloy layer composed of the Al-Mg alloy phase 24 .
[0102] The Al-Mg-Si alloy layer 23 may be in a form including a mixed structure in which the Mg-Si alloy particles 25 are surrounded by the Al-Mg alloy phase 24 .
[0103] The description about the Al-Mg-Si alloy layer is the same as that described in the first embodiment, and thus is omitted.
[0104] The Al-Si alloy layer may be located between the steel plate and the...
no. 3 approach
[0111] if refer to figure 2 To illustrate the third embodiment, the alloy-coated steel sheet of the third embodiment of the present invention manufactured according to the manufacturing method may include: a steel sheet 21; and an Al-Mg-Si alloy layer 23 located on the steel sheet; the Al - The Mg—Si alloy layer 23 may have a gradient of Mg content within the alloy layer.
[0112] The alloy-coated steel sheet is produced by coating magnesium on a hot-dip aluminum-coated steel sheet by a physical vapor deposition method, so it is different from the prior art in that there is a limitation in the control of the magnesium content of the Al-Mg-Si alloy layer, which can be obtained by diffusion heat treatment, etc. To control the distribution of magnesium, it is possible to make a variety of Al-Mg-Si alloy layer structures.
[0113] Since there is a gradient in the Mg content in the Al-Mg-Si layer, there are various alloy phases at different Mg concentrations, which can be expecte...
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Abstract
Description
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Application Information
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