Cold-rolled steel sheet and method for manufacturing same
A cold-rolled steel sheet with specific compositions and manufacturing processes addresses the trade-off between strength and formability, achieving ultra-high strength and high ductility, suitable for complex automotive parts and improving vehicle safety.
WO2026141797A1PCT designated stage Publication Date: 2026-07-02HYUNDAE STEEL CO LTD
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- HYUNDAE STEEL CO LTD
- Filing Date
- 2025-05-29
- Publication Date
- 2026-07-02
AI Technical Summary
Technical Problem
Cold-rolled steel sheets face a trade-off between ultra-high strength and high formability, with elongation decreasing as strength increases, and existing next-generation products are not yet commercialized.
Method used
A cold-rolled steel sheet composition comprising C, Si, Mn, and Fe with specific weight percentages, including a tempered martensite and retained austenite structures, and manufacturing processes involving reheating, hot-rolling, coiling, cold-rolling, annealing, and tempering to achieve ultra-high strength and high ductility.
Benefits of technology
The steel sheet achieves tensile strength of 1470 MPa or more and elongation of 15% or more, enabling the processing of complex automotive parts and enhancing vehicle body safety.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure KR2025007403_02072026_PF_FP_ABST
Abstract
The present application relates to a cold-rolled steel sheet and a method for manufacturing same. According to the present application, it is possible to provide a cold-rolled steel sheet having ultra-high strength and high ductility, and a method for manufacturing same.
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