Method for manufacturing high-strength cold-rolled/hot-rolled DP steel having a tensile strength grade of 590 MPa and excellent workability, as well as little deviation in the material properties thereof

A technology with excellent workability and tensile strength, applied in the direction of manufacturing tools, heat treatment furnaces, metal rolling, etc., can solve the problems of cold-rolled DP steel without proposed mechanical properties, achieve excellent workability, improve recyclability, Excellent workability
CN103237906AInactive Publication Date: 2013-08-07POHANG IRON & STEEL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
POHANG IRON & STEEL CO LTD
Publication Date
2013-08-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

An object of the present invention is to provide a method for manufacturing high-strength cold-rolled / hot-rolled DP steel having a tensile strength grade of 590 MPa and excellent workability, as well as little deviation in the material properties thereof, wherein said excellent workability can be achieved using thin-slab continuous casting, and deviations in the material properties in the widthwise and lengthwise directions of a strip can be significantly reduced.
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Description

technical field

[0001] The present invention relates to a method for manufacturing high-strength cold-rolled / hot-rolled DP steel with a tensile strength grade of 590 MPa, excellent machinability, and small deviations in mechanical properties, and more particularly, to a method of using thin slab casting technology A method for manufacturing high-strength cold-rolled / hot-rolled DP steel with excellent elongation and small deviation in mechanical properties. Background technique

[0002] Recently, with the need to increase the fuel efficiency of motor vehicles and to strengthen safety regulations for drivers and passengers in the motor vehicle industry, there is an ongoing search for lightweight, high-strength motor vehicle bodies that can provide improved crash resistance. Fully researched.

[0003] Therefore, in order to satisfy both light-weight characteristics and high-strength characteristics of automobiles, high-strength steel sheets of 590 MPa class or higher have been...

Claims

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