一种汽车用高表面质量钢板及其生产方法
By optimizing specific chemical compositions and processes, the problems of surface quality and smelting cost of automotive steel sheets have been solved, enabling the production of high-strength, low-cost steel sheets with high surface quality, which possess excellent mechanical and weldability properties.
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
Existing technologies for producing steel sheets for automobiles struggle to achieve low cost, ease of smelting, and excellent mechanical properties while ensuring surface quality, and also result in defects such as iron oxide scale streaks and color differences.
The product is designed with a specific chemical composition, including a reasonable ratio of C, Si, Mn, Al, and Ce. Through smelting, hot rolling, bell-type furnace heating, and pickling processes, the content of impurity elements is controlled, the microstructure is optimized, and the ratio of ferrite to pearlite is ensured. Hydrochloric acid is used for pickling to remove iron oxide scale.
High surface quality steel plates with yield strength of 235-315MPa, tensile strength of 370-450MPa, longitudinal elongation of 33%-50%, and surface roughness Ra of 1.70-1.91μm are produced, avoiding iron oxide scale streaks and color difference defects, reducing smelting costs, and improving welding performance and structural stability.
Smart Images
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