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Al-based plated steel material and method for producing same

A manufacturing method and steel technology, applied in the direction of manufacturing tools, hot-dip plating process, metal material coating process, etc., to achieve the effect of excellent corrosion resistance

Active Publication Date: 2014-08-06
JFE STEEL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] That is, in Patent Document 1, massive Mg exists 2 Si or Al 3 Mg 2 The problem of partial dissolution of the coating starting from these phases due to precipitation
[0008] In addition, in Patent Document 2, Mg 2 Problems such as preferential dissolution of the Si phase and partial dissolution of the plating layer starting from its periphery
[0009] In addition, in Patent Document 3, there is a problem that the preferential dissolution of the intermetallic compound phase and the partial dissolution of the plating proceed.

Method used

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  • Al-based plated steel material and method for producing same
  • Al-based plated steel material and method for producing same
  • Al-based plated steel material and method for producing same

Examples

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Embodiment

[0091] Next, the effects of the present invention will be described using examples and comparative examples, but this example is merely an example for explaining the present invention and does not limit the present invention.

[0092] (Samples 1 to 7)

[0093] The cold-rolled steel sheet was annealed at 800° C. for 30 seconds in a reducing gas, and then immersed in a plating bath maintained at 680° C. for 5 seconds at a sheet temperature of 700° C. to perform hot-coating. After the hot-dip coating, the coating structure was controlled by adjusting the cooling rate (Table 1), and an Al-based plated steel sheet was produced. Table 1 shows the amount of plating deposited on each side of the obtained Al-based plated steel sheet, the composition of the plating, and the structure of the plating.

[0094] It should be noted that for the obtained plated steel sheet, the amount of plating material deposited was measured by gravimetric method, and the composition was analyzed by chemic...

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Abstract

This invention addresses the problem of providing an Al-based plated steel material having excellent corrosion resistance compared with a conventional product, and a method for producing the same. As a means for solving the problem, this invention forms on the surface of a steel material a plated layer containing by mass 6-10% Mg, 3-7% Si, 0.2-2% Fe, and 0.02-2% Mn, the remainder comprising Al and unavoidable impurities, and forms a alphaAl-Mg2Si-(Al-Fe-Si-Mn) pseudo-ternary eutectic structure having an area ratio of at least 30% within the plated layer.

Description

technical field [0001] The present invention relates to an Al-based plated steel material and a method for producing the same, and particularly intends to achieve further improvement in corrosion resistance than conventional ones. Background technique [0002] As plated steel materials excellent in corrosion resistance and high-temperature oxidation resistance, Al-based plated steel materials are widely used in the fields of automotive muffler materials, building materials, and the like. However, Al-based plated steel exhibits excellent corrosion resistance by stabilizing corrosion products in a corrosive environment under dry conditions. On the other hand, in an environment exposed to a wet state, the plating material is eluted at an extremely fast rate, and it is easy to Since the steel sheet is caused to corrode, there is a problem that sufficient corrosion resistance cannot be volatilized. [0003] Therefore, for the purpose of improving corrosion resistance, for exampl...

Claims

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Application Information

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IPC IPC(8): C23C2/12C22C21/06
CPCC23C2/28C23C2/12Y10T428/12757C21D8/0473C22C21/06C21D1/673C21D2211/004C22F1/047C21D8/0478C23C2/29
Inventor 水流彻丸山俊夫里达雄竹山雅夫吉田昌浩藤田荣铃木幸子安藤聪中丸裕树
Owner JFE STEEL CORP
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