一种高表面质量高强度汽车用钢及其生产方法
By controlling specific chemical compositions and processes, the problems of high strength and high surface quality in automotive steel have been solved, enabling the production of high-performance, low-cost automotive steel suitable for automotive chassis structural components.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ANGANG STEEL CO LTD
- Filing Date
- 2026-03-20
- Publication Date
- 2026-07-17
AI Technical Summary
While existing automotive steels meet the requirements of high strength and high surface quality, they also suffer from problems such as difficulty in controlling Si content, high cost, and easy occurrence of oxide streaks and color difference defects on the surface.
By using chemical elements with specific composition ratios, such as combinations of C, Si, Mn, Al, V, Ti, Cr, and Ce, and through smelting and hot rolling processes, ferrite and bainite structures are formed. Combined with hydrochloric acid pickling, the formation of iron oxide scale is avoided, ensuring surface quality and mechanical properties.
It achieves high strength (yield strength ≥ 555 MPa, tensile strength ≥ 650 MPa) and high surface quality (no iron oxide scale streaks and color difference), reduces smelting difficulty and cost, and improves welding performance and structural stability.
Smart Images
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