Steel sheet and method of manufacturing steel sheet to protect incline of coat layer
A technology of steel sheet and coating, applied in the direction of coating, manufacturing tools, metal material coating process, etc., can solve problems such as low corrosion resistance, reduce cracks, improve rust resistance and weldability, prevent coating layer skew effect
Inactive Publication Date: 2019-04-02
HYUNDAI MOTOR CO LTD +1
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
[0010] In order to solve such a problem, for example, an electric heating step using a steel sheet including a Zn-based coating can be provided, however, compared to a steel sheet including an Al-based coating, a steel sheet including a Zn-based coating has low corrosion resistance etc.
Method used
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Embodiment
[0081] Hereinafter, the present invention will be described in more detail by way of examples. These examples are only for illustrating the present invention, and it is obvious to those skilled in the art that it should be understood that the scope of the present invention is not limited to these examples.
[0082] In the present invention, in order to confirm whether deflection occurs, the surface of the steel sheet including the Al-based coating is treated at a temperature of 600° C. for 1 to 10 minutes, and the steel sheet including the Al-based coating is treated at 400° C. Heat treatment at a temperature of 10 minutes, and then confirm whether deflection occurs after electric heating.
[0083] Figures 20A-20B is the surface of an unheat-treated steel sheet comprising an Al-based coating ( Figure 20A ) and the surface of the steel sheet comprising an Al-based coating after electric heating ( Figure 20B ) of the enlarged photo. First, an unheat-treated steel sheet co...
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Abstract
The invention provides a steel sheet and a method of manufacturing a steel sheet to protect the incline of a coat layer, and specifically provides a method of manufacturing an electrically heated steel sheet to protect the incline of a coating layer and a steel sheet manufactured by the method. The steel sheet may include an Al-based coating layer including an aluminum-iron intermetallic compoundthrough heat treatment before electrically heating the steel sheet during a hot forming process such that the incline of the coating layer in the electrical heating can be prevented. In particular, the method may include: heat-treating a steel sheet; electrical heating the heat-treated steel sheet; pressing and forming the heated steel sheet; and cooling the formed steel sheet.
Description
[0001] Citations to related applications [0002] This application claims priority under 35 U.S.C. §119 to Korean Patent Application No. 10-2017-0124971 filed September 27, 2017 at the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present invention relates to a method of forming electrically heated steel sheet and the steel sheet produced by the method. The steel sheet may include an Al-based coating including an aluminum-iron intermetallic compound that may be formed by heat treatment before electrically heating the steel sheet, thereby preventing deflection of the coating during electrical heating. Background technique [0004] Recently, due to environmental problems arising around the world, methods of reducing fuel have been found to solve these problems. To reduce fuel consumption, solutions proposed by the automotive industry are to improve the efficiency of the vehicle's ...
Claims
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IPC IPC(8): C23C10/28C23C10/60C21D1/34
CPCC21D1/34C23C10/28C23C10/60C21D8/0278C21D1/40C21D8/0247C21D9/46B21D22/022B21D37/16B21D43/287C23C2/28C23C2/12C21D8/0284
Inventor金英泰
OwnerHYUNDAI MOTOR CO LTD