Patent · US Active

Method for producing high-strength duplex stainless steel

US10407750B2 · kind B2 · utility

0Cited by

4References

8Claims

0Family size

Assignee

Outokumpu Oyj · FI

Inventors

James Oliver · Fjärdhundra, SE
Jan Andersson · Ystad, SE
Erik Schedin · Uppsala, SE

Key dates

Filing date	Dec 10, 2014
Grant date	Sep 10, 2019
Priority date	—
Expiry date	Sep 22, 2035

Classification

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

Abstract

The invention relates to a method for producing a high-strength ferritic austenitic duplex stainless steel with the TRIP (Transformation induced plasticity) effect with deformation. After the heat treatment on the temperature range of 950-1150° C. in order to have high tensile strength level of at least 1000 MPa with retained formability the ferritic austenitic duplex stainless steel is deformed with a reduction degree of at least 10%, preferably at least 20% so that with a reduction degree of 20% the elongation (A50) is at least 15%.

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