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Hot dip aluminized steel material having excellent corrosion resistance and workability, and manuracturing method therefor

一种热浸镀铝、制造方法的技术，应用在热浸镀工艺、化学仪器和方法、金属材料涂层工艺等方向，能够解决无法、制造镀铝合金钢板、镀层扩散量增加等问题，达到耐腐蚀性优异、加工性优异、容易理解的效果

Active Publication Date: 2019-08-06
POSCO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the method, since the amount of plating diffusion of Fe increases due to heat treatment over a long period of several minutes, the alloy phase is composed only of an alloy phase with a high Fe content, and alloying is performed by heat treatment of the cut test piece unit, so that it cannot be Manufacture of Aluminum Alloyed Steel Sheets by Continuous Process

Method used

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  • Hot dip aluminized steel material having excellent corrosion resistance and workability, and manuracturing method therefor
  • Hot dip aluminized steel material having excellent corrosion resistance and workability, and manuracturing method therefor
  • Hot dip aluminized steel material having excellent corrosion resistance and workability, and manuracturing method therefor

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Embodiment Construction

[0058] Hereinafter, the present invention will be described in more detail through examples. However, these examples are only used to illustrate the implementation of the present invention, and the present invention is not limited to the examples, because the scope of rights of the present invention is determined by the content described in the claims and the content reasonably derived therefrom. Sure.

[0059] (Example)

[0060] Manufacturing slabs having 0.15% C, 1.0% Si, 2.3% Mn, 0.037% Al, 0.5% Ti, 10 ppm N, 5 ppm P, 13 ppm S by weight composition. The slab was kept at 1200° C. for 1 hour, then finished rolling at 900° C., cooled to 650° C., and furnace cooled after being kept at 650° C. for 1 hour in a holding furnace.

[0061] The cooled hot-rolled steel plate was visually observed for hot-rolling cracks, and was pickled with 60° C. and 17 volume percent HCl solution for 30 seconds to dissolve iron oxide on the surface of the steel plate. If pickling for 30 seconds w...

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Abstract

Disclosed is a hot dip aluminized steel material comprising base steel and a hot-dip Al-Si-coated layer, wherein the surface layer of the base steel is provided with an Al-enriched layer in which 2 wt% to 20 wt% of Al is solid-solubilized, and an interface between the base steel and the hot-dip Al-Si-coated layer has a double-layer structured interfacial alloy layer having different hardnesses.

Description

technical field [0001] The present invention relates to a hot-dip aluminized steel material excellent in corrosion resistance and workability and a method for producing the same. Background technique [0002] In recent years, in accordance with the carbon dioxide standard for protecting the global environment, the reduction in weight of vehicles and the strengthening of steel sheets for vehicles to improve the collision stability of vehicles have continued to be demanded. [0003] In order to meet the above-mentioned requirements, in recent years, high-strength steel sheets of 1 Gpa class with 500 MPa or more have been developed and applied to vehicles. As a method of improving the strength of the steel plate, it is possible to easily manufacture high-strength steel plates by increasing the addition of steel strengthening components such as carbon. However, for steel plates for vehicle bodies, cracks cannot occur during the forming process of the vehicle body, so it is neces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/12C22C21/02
CPCC22C21/02C23C2/12C23C2/28C23C2/16C23C30/00C23C2/40C23C2/29B32B15/012
Inventor 姜己哲黄铉锡宋渊均朴一祯
Owner POSCO CO LTD