Steel sheet having enhanced ductility for a molding member, molding member, and method for manufacturing same

A technology for forming parts, steel plates, applied in the direction of manufacturing tools, vehicle parts, chemical instruments and methods, etc., can solve problems such as low elongation

Active Publication Date: 2013-11-13
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, steel sheets obtained by this technique have a low elongation of less than 10%, and thus cannot have sufficient resistance to impacts generated in automobiles

Method used

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  • Steel sheet having enhanced ductility for a molding member, molding member, and method for manufacturing same
  • Steel sheet having enhanced ductility for a molding member, molding member, and method for manufacturing same
  • Steel sheet having enhanced ductility for a molding member, molding member, and method for manufacturing same

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Embodiment ）

[0068] Steel slabs having the composition shown in Table 1 and formed by vacuum melting were heated in a heating furnace at 1000° C. to 1300° C. for 1 hour, and then hot-rolled to form hot-rolled steel sheets. The hot-rolled steel sheet is cooled at a predetermined temperature in a furnace. Hot rolling is done at a temperature range of 850°C to 950°C, and the cooling temperature in the furnace is 680°C. Thereafter, the hot-rolled steel sheets were pickled and cold-rolled at a reduction ratio of 50%. The cold-rolled steel sheets were annealed at 780°C. Thereafter, the cold-rolled steel sheet was finally continuously annealed at an overaging temperature of 400°C.

[0069] [Table 1]

[0070]

[0071] *IS: Inventive steel, **CS: Comparative steel

[0072] Such as figure 1 and Table 2 to simulate the heat treatment in the hot stamping process. Specifically, the steel plate fabricated as described above was heated at a rate of 30 °C / s and held at 900 °C (SS) (above Ac3) for...

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Abstract

The present invention relates to a steel sheet for a formed member having enhanced ductility, a formed member, and a method for manufacturing the formed member, and more particularly, to a steel sheet for making a formed member having high strength and ductility such as an automotive structural member and a reinforcing member, a formed member, and a method for manufacturing the formed member. The steel sheet for a formed member has enhanced ductility, and includes, by weight%, C: 0.1% to 1.0%, Si+Al: 0.4% to 3.0%, Mn: 0.1% to 5.0%, P: 0.0001% to 0.1%, S: 0.0001% to 0.03%, N: 0.03% or less (but not 0%), and the balance of Fe and inevitable impurities. The formed member having high strength and ductility that can be used for forming an automotive structural member, a reinforcing member, etc. In addition, the formed member can be used for a heat-treatable impact resistant member.

Description

technical field [0001] The present invention relates to a steel plate for a shaped part with improved ductility, a shaped part, and a method for manufacturing the same, and more particularly, to a method for preparing a shaped part with high strength and ductility, such as automotive structural parts and A steel plate for a reinforced part, a shaped part, and a method for manufacturing the shaped part. Background technique [0002] As safety requirements and weight reduction requirements for automobiles increase, research has been conducted to develop high-strength and impact-resistant steel sheets as automobile body materials. However, high-strength steel sheets for automobiles may be difficult to form into desired shapes, so there is a limit to increasing the strength of steel sheets for automobiles. [0003] To solve these problems, Korean Patent Application Publication No. 2007-0110914 discloses a steel sheet with improved formability and 800-Mpa class tensile strength ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/00C22C38/04C21D8/00
CPCC21D9/46C22C38/14C21D1/673C21D8/0205C23C2/12C23C2/06C22C38/12C22C38/04C21D2211/001C23C2/04C22C38/00C21D2211/008C22C38/06C22C38/02C21D8/005C21D1/18C22C38/08C22C38/16C22C38/001C22C38/18B62D29/007B32B15/012B32B15/013C22C38/002C22C38/34C22C38/38C22C38/60Y10T428/12972Y10T428/12757Y10T428/12049Y10T428/12799Y10T428/31678
Inventor 吴振根郭在贤赵悦来金基洙
Owner 浦项股份有限公司
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