Patent ID: 11920209
Assignee: NORTHWESTERN UNIVERSITY
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A carbide-free bainite and retained austenite steel, comprising:
a composition designed and processed such that the carbide-free bainite and retained austenite steel meets property objectives comprising a yield strength in a range of about 1000-2000 MPa, a uniform ductility, a total elongation and hole-expansion ratio, a level of weldability and an austenite stability designed to have an austenite start temperature Msσ to be equal to an application temperature in range from about 50° C. to −50° C., wherein the property objectives are design specifications of the carbide-free bainite and retained austenite steel,
wherein the composition comprises carbon (C) no more than 0.4 wt. %, silicon (Si) no less than 1.0 wt. %, manganese (Mn) in a range of 0.2-1.0 wt. %, and molybdenum (Mo) of 0.8 wt. %, and iron (Fe) in balance.