一种高强塑中锰高铝轻质钢及其制备方法和应用
By preparing high-strength, high-ductility, medium-manganese, and high-aluminum lightweight steel, a multi-configuration microstructure is formed, which solves the problem of high density in existing lightweight steel, achieving density reduction and improved mechanical properties, making it suitable for automotive steel.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- YANSHAN UNIV
- Filing Date
- 2024-01-02
- Publication Date
- 2026-07-17
AI Technical Summary
Existing Fe-Mn-Al-C lightweight steel has a high density, making it difficult to meet the technical requirements for automotive steel. How can its density be further reduced without affecting its mechanical properties?
The method for preparing high-strength, high-ductility, medium-manganese, high-aluminum lightweight steel includes metal raw material smelting, hot forging, homogenization, hot rolling, cold rolling, and annealing. By controlling the annealing cooling method, a multi-configuration microstructure is formed, containing austenite, ferrite, and κ-carbides. The characteristics of Mn, Al, and C elements are utilized to expand the austenite phase region, stabilize the austenite phase, reduce density, and improve strength and ductility.
The prepared high-strength, high-manganese, high-aluminum lightweight steel has a 13.54% lower density, a tensile strength of 1188–1329 MPa, a yield strength of 818–1023 MPa, and an elongation of 8–43%, exhibiting excellent comprehensive mechanical properties and is suitable for the automotive industry.
Smart Images
Figure CN117701851B_ABST