Title:
HIGH-GRADE DUPLEX STAINLESS STEEL WITH MUCH SUPPRESSED FORMATION OF INTERMETALLIC PHASES AND HAVING EXCELLENT CORROSION RESISTANCE, EMBRITTLEMENT RESISTANCE, CASTABILITY AND HOT WORKABILITY
Document Type and Number:
Japanese Patent JP2011174183
Kind Code:
A
Abstract:
To provide high-grade duplex stainless steel having an excellent corrosion resistance, embrittlement resistance, castability and hot workability.
The high-grade duplex stainless steel has a chemical composition consisting, by weight, of 21.0-38.0% Cr, 3.0-12.0% Ni, 1.5-6.5% Mo, 0-6.5% W, 3.0% or less Si, 1.0% or less Al, 8.0% or less Mn, 0.2-0.7% N, 0.1% or less C, at least one element selected from the group consisting of 0.1% or less B, 3.0% or less Cu and 3.0% or less Co, and Mischmetal (MM) and/or 0.0001-1.0% Y in total, and the balance of iron and inevitable impurities. Formation of intermetallic phases such as sigma (σ) and khi (χ) deteriorating corrosion resistance and mechanical properties is suppressed.
Inventors:
PARK YONG-SOO
KIM SOON-TAE
LEE INN-SUNG
KIM SOON-TAE
LEE INN-SUNG
Application Number:
JP2011055831A
Publication Date:
September 08, 2011
Filing Date:
March 14, 2011
Export Citation:
Assignee:
PARK YONG-SOO
International Classes:
C22C38/00; C22C38/42; C22C38/44; C22C38/58; C21D8/02
Domestic Patent References:
| JPH06116684A | 1994-04-26 | |||
| JPH07278755A | 1995-10-24 | |||
| JPH0593246A | 1993-04-16 | |||
| JPH08218154A | 1996-08-27 | |||
| JPH05132741A | 1993-05-28 |
Attorney, Agent or Firm:
Hajime Tsukuni
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