Patent · US Active

Method for manufacturing and utilizing ferritic-austenitic stainless steel with high formability

US11286546B2 · kind B2 · utility

0Cited by

5References

21Claims

0Family size

Assignee

Outokumpu Oyj · FI

Inventors

James Oliver · Fjärdhundra, SE
Jan Y. Jonsson · Avesta, SE
Juho Talonen · Helsinki, FI

Key dates

Filing date	Apr 18, 2011
Grant date	Mar 29, 2022
Priority date	—
Expiry date	Sep 29, 2031

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC21D2211/005
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The invention relates to a method for manufacturing a ferritic-austenitic stainless steel having good formability and high elongation. The stainless steel is heat treated so that the microstructure of the stainless steel contains 45-75% austenite in the heat treated condition, the remaining microstructure being ferrite, and the measured Md30 temperature of the stainless steel is adjusted between 0 and 50° C. in order to utilize the transformation induced plasticity (TRIP) for improving the formability of the stainless steel.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.