一种高强钢及其制备方法
By using high-strength steel with specific composition and microstructure, combined with smelting, hot rolling, cold rolling and annealing processes, a high-strength steel with high strength, excellent formability and good weldability is prepared, which solves the performance deficiencies of the existing technology and meets the needs of automotive body-in-white structural components.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHOUGANG GROUP CO LTD
- Filing Date
- 2025-04-08
- Publication Date
- 2026-07-17
AI Technical Summary
Existing high-strength steels cannot meet the increasingly demanding requirements of automotive body-in-white structural components in terms of strength, formability, surface quality, and weldability, especially due to problems such as low elongation, poor local formability, and poor weldability caused by excessive Si content.
High-strength steel with specific composition and microstructure, including elements such as C, Si, Mn, Al, Nb, and Ti, is prepared through processes such as smelting, hot rolling, cold rolling, and annealing to produce microstructures of bainite, tempered martensite, retained austenite, and ferrite. Grain size is controlled, and nickel-rich and zinc-plated layers are formed on the surface to improve performance.
It achieves high strength, excellent formability, good surface quality and excellent weldability, reduces the embrittlement of liquid metal, and meets the high-performance requirements of automotive body-in-white structural components.
Smart Images
Figure CN120591652B_ABST