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Low-specific-gravity clad steel sheet having excellent strength and plateability, and manufacturing method therefor

A composite steel plate and coating technology, which is applied in the field of low specific gravity composite steel plate and its manufacturing, can solve the problems of poor coating properties and achieve excellent coating properties

Pending Publication Date: 2021-02-12
浦项股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this case, since a large amount of aluminum whose oxidation tendency is higher than that of iron is added, an aluminum oxide film is also formed on the surface of the steel material in the annealing atmosphere under reducing conditions, so there is a problem that the coating property is deteriorated.

Method used

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  • Low-specific-gravity clad steel sheet having excellent strength and plateability, and manufacturing method therefor
  • Low-specific-gravity clad steel sheet having excellent strength and plateability, and manufacturing method therefor
  • Low-specific-gravity clad steel sheet having excellent strength and plateability, and manufacturing method therefor

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Embodiment Construction

[0093] Hereinafter, the present invention will be described more specifically by way of examples. However, it should be noted that the following examples are only used to illustrate the present invention for more detailed description, and are not intended to limit the scope of rights of the present invention. This is because the scope of rights of the present invention is determined by the content described in the claims and the content reasonably derived therefrom.

[0094] (Example)

[0095] Steel ingots of carbon steel and light steel plate having the composition shown in the following Table 1 were prepared, and the surface of the steel ingot was washed, and then the light steel plate was arranged between two carbon steels to manufacture a three-layer laminate so that The three-layer laminates have the lamination ratios of Table 2 below. Afterwards, arc welding is carried out along the boundary surfaces of the laminates using welding rods. The laminate with the boundary ...

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Abstract

One aspect of the present invention relates to a low-specific-gravity clad steel sheet having excellent strength and plateability, the clad steel sheet comprising a base metal, and a clad material provided at both sides of the base metal, wherein the base metal is a ferritic-austenitic duplex lightweight steel sheet comprising, by wt%, 0.3-0.7% of C, 2.0-9.0% of Mn, 4.5-8.0% of Al and the balanceof Fe and inevitable impurities, and the clad material is a ferritic carbon steel comprising, by wt%, 0.0005-0.2% of C, 0.05-2.5% of Mn and the balance of Fe and inevitable impurities.

Description

technical field [0001] The present invention relates to a low-specific-gravity composite steel sheet excellent in strength and platability, which can be used for outer panels such as doors and hoods of automobiles, and inner panel structural members, etc., and a method for manufacturing the same. Background technique [0002] In recent years, there has been a strong demand for weight reduction of automobiles in accordance with regulations on carbon dioxide for reducing global warming. Lightweight methods for automobiles include a method of reducing the weight of components by using high-strength steel plates such as P-added ultra-low carbon steel, bake-hardening steel, and dual-phase steel to reduce the thickness of the components. However, when the thickness of the steel plate becomes thinner, there is a problem that the rigidity of the member decreases, so there is a limit to reducing the weight of the member by reducing the thickness of the steel plate. [0003] In addit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/18B32B15/04B32B37/06B32B37/10B23K20/04C22C38/04C22C38/06B23K103/16B32B38/00
CPCB23K20/04C22C38/04C22C38/06B23K20/227B23K20/24B23K31/02B23K2101/16B23K2101/18B23K2103/04B23K2103/18B32B15/011C22C38/02C23C2/02C23C2/06C23C2/12C23C30/00C22C38/38C22C38/14C22C38/12C22C38/001C23C2/024C23C2/022B32B15/18B32B15/043B32B37/065B32B37/10B23K2103/166B32B2038/0048B32B2255/205B32B15/013C21D6/001C21D6/005C21D6/008C21D8/0205C21D8/0226C21D8/0236C21D8/0273C21D9/46C21D9/50C21D2211/001C21D2211/005C22C38/002C22C38/08
Inventor 具民书宋泰镇
Owner 浦项股份有限公司
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