Plated steel material

A technology of steel and coating, applied in sputtering, ion implantation, superimposed coating and other directions, can solve the problem of insufficient corrosion resistance, and achieve excellent coating adhesion and wear resistance. , Excellent effect of alkali corrosion resistance

Active Publication Date: 2018-06-08
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to improve the corrosion resistance of steel materials, Zn is basically added to the plating layer in the same way as the formation of the plating layer. However, for many applications, the film added with only Zn often becomes a film with insufficient corrosion resistance.

Method used

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Examples

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Embodiment

[0121] Next, the present disclosure will be further described based on examples.

[0122] First, at the time of vapor deposition of the plating layer, the vapor deposition metals (Al, Mg, Zn) placed in the chamber are individually heated by electron beams. Alloys of these elements can also be heated and vapor-deposited, but since these metals have different melting points and vapor pressures, if alloys are used for vapor deposition, it becomes difficult to control the composition distribution of the plating layer with respect to the depth direction , so a separate evaporation source for each element is used. In addition, the vapor deposition conditions are as follows.

[0123] ·Device capacity (chamber capacity): 0.6m 3 ,

[0124] ・The distance from the vapor deposition metal source to the steel plate (substrate): 0.6m,

[0125] ·Vacuum degree in evaporation: 5.0E-3~2.0E-5Pa,

[0126] ・Capacity of crucible for vapor deposition metal source: 40ml, inner diameter:

[012...

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Abstract

A plated steel material has a steel material, a plating layer that covers the surface of the steel material, and an interface alloy layer formed at the boundary between the steel material and the plating layer, wherein: the compositional makeup of the plating layer includes, in mass%, 20-83% of Zn and 2.5-46.5% of Al, the remaining portion being Mg and impurities, and the Mg content being not lessthan 10%. The structure of the plating layer comprises a quasicrystal phase, a MgZn2 phase, and a remaining structure; the area fraction of the quasicrystal phase is 30-60%; at least 90% by number ofthe quasicrystal phase is a quasicrystal phase of which the particle size in the longitudinal axis direction thereof is 0.05-1.0 [mu]m; the thickness of the plating layer is not less than 0.1 [mu]m;and the thickness of the interface alloy layer is not greater than 500 nm.

Description

technical field [0001] The present disclosure relates to plated steel. Background technique [0002] Conventionally, improvement of the corrosion resistance of steel materials by coating the surface of steel materials with a metal such as Zn has been carried out. At present, steel materials coated with Zn, Zn-Al, Zn-Al-Mg, Al-Si, etc. are also produced. Coating of steel materials is often required not only corrosion resistance but also wear resistance and adhesion after processing. As a coating method for steel materials, hot-dip plating suitable for mass production is most widely used. [0003] Corrosion resistance required for coating of steel materials is increasing year by year. Therefore, in recent years, as shown in Patent Document 1 and Patent Document 2 below, plating in which the Mg content is increased to a level higher than conventional ones has also been proposed. However, if an attempt is made to increase Mg to a level higher than conventional ones, there is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/14B32B15/01C22C18/00C22C21/00C22C23/02C22C23/04C22C30/06C23C14/16
CPCC22C18/00C22C21/00C22C23/02C22C23/04C22C30/06C23C14/021C23C14/30B32B15/012B32B15/013C22C21/06C22C21/10C23C14/16B32B15/017C22C18/04C23F13/14C23F13/08C23C14/24B32B15/01C23C14/165C22C23/00Y10T428/264C23C14/14C23C2/06C23C28/025C23C2/04Y10T428/24975C23C2/12Y10T428/263C23C28/021B32B15/04B32B15/043C23C28/023Y10T428/265C23C30/005Y10T428/2495Y10T428/24967B32B15/18C23C30/00Y10T428/12965Y10T428/12958Y10T428/12799Y10T428/12972Y10T428/12757Y10T428/12729B32B2311/20B32B2311/24B32B2311/30
Inventor 小林亚畅德田公平下田信之后藤靖人松村贤一郎
Owner NIPPON STEEL CORP
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