High-strength plastic heterogeneous structure austenitic stainless steel and method for manufacturing the same
By controlling the initial austenite grain size and cold rolling deformation rate, heterogeneous austenitic stainless steel is formed, which solves the problem of insufficient strength of austenitic stainless steel and achieves a synergistic improvement in high strength and high plasticity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- INST OF MATERIALS HENAN ACAD OF SCI
- Filing Date
- 2026-06-11
- Publication Date
- 2026-07-17
AI Technical Summary
Existing austenitic stainless steels lack sufficient strength, making them difficult to apply in high-load and complex service environments. Furthermore, cold deformation or complete recrystallization of fine grains can lead to a decrease in plasticity.
By controlling the initial austenite grain size and cold rolling deformation rate, a heterogeneous structure is formed. Selective recrystallization is used to obtain a microstructure in which equiaxed fine grains and restored large grains coexist, thus avoiding reverse phase transformation treatment.
It significantly improves yield strength and tensile strength while maintaining high elongation, and is suitable for conventional austenitic stainless steels such as 304 series, 316 series and 316LN series.
Smart Images
Figure CN122405940A_ABST