Steel Sheet for Formed Member Having Enhanced Ductility, Formed Member, and Method for Manufacturing the Formed Member
a technology of formed members and enhanced ductility, which is applied in the direction of metal layered products, metal coating processes, thin material processing, etc., can solve the problems of limited increase in the strength of steel sheets for automobiles, increased costs and abrasion of cold forming dies, and difficulty in adjusting the shape of steel sheets, etc., to achieve high strength and ductility
Inactive Publication Date: 2013-11-07
POHANG IRON & STEEL CO LTD
View PDF9 Cites 35 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
[0016]The present invention provides a formed member having high strength and ductility that can be used for forming an automotive s
Problems solved by technology
However, high-strength steel sheets for automobiles may be difficult to form into desired shapes, and thus there is a limit on increasing the strength of steel sheets for automobiles.
However, large amounts of substances such as carbon (C) and manganese (Mn) have to be added to increase the strength of the steel sheet up
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
example
[0063]Steel slabs having compositions as shown in table 1 and formed by vacuum melting were heated at 1000° C to 1300° C. for 1 hour in a heating furnace, and were hot-rolled to form hot-rolled steel sheets. The hot-rolled steel sheets were cooled at a predetermined temperature in a furnace. The hot rolling was finished at a temperature range of 850° C. to 950° C., and the cooling temperature at the furnace was 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 sheets were finally continuously annealed at an overaging temperature of 400° C.
TABLE 1Chemical Composition (weight %)Nos.CSiMnPSAlNOthers*IS 10.111.63.030.00270.00530.0340.0033—IS 20.311.61.540.00230.00380.0320.0022—IS 30.311.63.030.00250.00430.0390.0153—IS 40.321.63.000.00290.00540.0320.0037—IS 50.311.72.980.00350.00450.5650.0027—IS 60.311.11.540.01600.00710.0130.0039—IS 70.311.72.97...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more PUM
| Property | Measurement | Unit |
|---|---|---|
| Fraction | aaaaa | aaaaa |
| Fraction | aaaaa | aaaaa |
| Fraction | aaaaa | aaaaa |
Login to view more
Abstract
Provided is 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 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.BACKGROUND ART[0002]As safety requirements and weight-reduction demands made on automobiles increase, research has been conducted into developing high strength and impact-resistant steel sheets as automotive body materials. However, high-strength steel sheets for automobiles may be difficult to form into desired shapes, and thus there is a limit on increasing the strength of steel sheets for automobiles.[0003]To address these problems, Korean Patent Application Publication No. 2007-0110914 discloses a steel sheet having enhanced formability and 800-MPa grade tensile strength...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more Application Information
Patent Timeline
Login to view more IPC IPC(8): C21D8/00C22C38/04C22C38/06C22C38/18C22C38/12C22C38/14C22C38/16C22C38/02C22C38/08
CPCC21D8/005C22C38/02C22C38/04C22C38/06C22C38/08C22C38/12C22C38/14C22C38/16C22C38/18C21D1/18C21D1/673C21D8/0205C21D9/46C21D2211/001C21D2211/008C22C38/00C22C38/001C23C2/06C23C2/12B32B15/012B32B15/013C22C38/002C22C38/34C22C38/38C22C38/60Y10T428/12972Y10T428/12757Y10T428/12049Y10T428/12799Y10T428/31678
Inventor OH, JIN-KEUNKWAK, JAI-HYUNCHO, YEOL-RAEKIM, KI-SOO
Owner POHANG IRON & STEEL CO LTD
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Try Eureka
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap