Effects of Solution-Annealing Temperature on the Precipitation of Secondary Phases and the Associated Pitting Corrosion Resistance in Hyper Duplex Stainless Steel

被引：17

作者：

Jeon, Soon-Hyeok ^{[1
]}

Kim, Soon-Tae ^{[1
]}

Kim, Se-Young ^{[1
]}

Choi, Min-Seok ^{[1
]}

Park, Yong-Soo ^{[1
]}

机构：

[1] Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea

来源：

MATERIALS TRANSACTIONS | 2013年 / 54卷 / 08期

关键词：

duplex stainless steel; pitting corrosion; solution heat treatment; secondary phase; SIGMA-PHASE; MECHANICAL-PROPERTIES; MICROSTRUCTURAL STABILITY; CHLORIDE SOLUTIONS; INCLUSIONS; NITROGEN;

D O I：

10.2320/matertrans.M2012402

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of the solution-annealing temperature on the precipitation of secondary phases and the associated pitting corrosion resistance in hyper duplex stainless steel after aging at 1123K were investigated in a highly concentrated chloride solution. Increasing the solution annealing temperature from 1333 to 1413 K retarded the formation of the secondary phases owing to a decrease in both the number of preferential precipitation sites such as the ferrite/austenite interface and the activities of Cr, Mo and W. The slow rate of degradation of the pitting corrosion resistance of the alloy with the increase in the solution annealing temperature appears to be caused by the retardation of the precipitation of the sigma phase. Based on the results of the precipitation of secondary phases and electrochemical tests, the optimal solution annealing temperature was determined to be 1373 K.

引用

页码：1473 / 1479

页数：7

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