The high corrosion resistance of duplex stainless steel （DSS） is due to elements such as Cr, Mo and N, hut also depends on the microstructure. The best general properties are obtained with approximately equal amounts of austenite and ferrite and the absence of third phases such as σ（sigma） and Cr2N. In the present work the effect of heat input variations on the microstructure and corrosion resistance of a DSS UNS S32760 in artificial sea water media were studied. The corrosion resistance in 3.5 % of NaCl solution was evaluated by potentiostatic polarization tests at room temperature. It is found that the presence of sigma phase and Cr2N decreases the corrosion potential. The specimen with heat input of approximately 0.95 kJ/mm have the best corrosion characteristics, which is the result for the lack of deleterious phases such as sigma and Cr2 N and balanced ferrite austenite proportion.
参考文献
| [1] | Jiang Z L;Chen X Y;Huang H et al.Grain Refinement of Cr25NiSMo1.5 Duplex Stainless Steel by Heat Treatment[J].Materials Science and Engineering,2003,363A:263. |
| [2] | Chen T H;Weng K L;Yang J R .The Effect of High Temper ature Exposure on the Microstruetural Stability and Toughness Property in a 2205 Duplex Stainless Steel[J].Materials Science and Engineering,2002,338A:259. |
| [3] | Park Y H;Lee Z H .The Effect of Nitrogen and Heat Treat ment on the Microstructure and Tensile Properties of 25Cr 7Ni- 1.5Mo 3W-Xn Duplex Stainless Steel Castings[J].Materials Science and Engineering,2001,297A:78. |
| [4] | Mann Joo Huh;Sang Beom Kim;Kyung Wook Paik;Young Gil Kim .EFFECT OF Mo SUBSTITUTION BY W ON IMPACT PROPERTY OF HEAT AFFECTED ZONE IN DUPLEX STAINLESS STEELS[J].Scripta materialia,1997(7):775-781. |
| [5] | Chen T H;Yang J R .Microstructural Characterization of Sire ulated Heat Affected Zone in a Nitrogen Containing 2205 Du !olex Stainless Steel[J].Materials Science and Engineering,2002,338A:166. |
| [6] | Dobranszky J;Szabo P J;Berecz T et al.Energy Dispersive Spectroscopy and Electron Backseatter Diffraction Analysis of Isothermally Aged SAF 2205 Type Superduplex Stairfless Steel[J].Spectrochimica Acta Part,2004,59B:1781. |
| [7] | John C.Lippold;Damian J Koteekl.Welding Metallurgy and Weldability of Stainless Steel[M].New York:Wiley-Interscience,2005 |
| [8] | A. J. RAMIREZ;J. C. LIPPOLD;S. D. BRANDI .The Relationship between Chromium Nitride and Secondary Austenite Precipitation in Duplex Stainless Steels[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2003(8):1575-1597. |
| [9] | Practical Guidelines for the Fabrication of Duplex Stainless Steels[M].London:International Molybdenum Association,1999 |
| [10] | Yousefieh M;Shamanian M;Saatchi A .Optimization of the Pulsed Current Gas Tungsten Arc Welding(PCGTAW)Parameters for Corrosion Resistance of Super Duplex Stainless Steel(UNS S32760)Welds Using the Taguehi Method[J].Journal of Alloys and Compounds,2011,509:782. |
| [11] | Gokhale A A;Tzavaras D J;Brody H D.Grain Structure and Hot Cracking in Pulsed Current GTAW of AISI 321 Stainless Steel[A].St.Louis:TMS-AIME,1982:223. |
| [12] | Giridharan P K;Murugan N .Optimization of Pulsed GTA Welding Process Parameters for the Welding of AISI 304L Stainless Steel Sheets[J].International Journal of Advanced Manufacturing Technology,2009,40:478. |
| [13] | DominguemAguilar M A;Newman R C .Detection of Deleterious Phases in Duplex Stainless Steel by Weak Galvanostatic Polarization in Alkaline Solution[J].Corrosion Science,2006,48:2560. |
| [14] | Hosni M.Ezuber;A.El-Houd;F.El-Shawesh .Effects of sigma phase precipitation on seawater pitting of duplex stainless steel[J].Desalination: The International Journal on the Science and Technology of Desalting and Water Purification,2007(1/3):268-275. |
| [15] | Muthupandi V;Bala Srinivasan P;Seshadri SK et al.Effect of Weld Metal Chemistry and Heat Input on the Structure and Properties of Duplex Stainless Steels[(Continued on Page 78)[J].Materials Science and Engineering,2003,358A:9. |
| [16] | Moura V S;lama L D;Pardal J M et al.Influence of Micro structure on the Corrosion Resistance of the Duplex Stainless SteeIUNSS31803[J].Materials Characterization,2008,59:1127. |
| [17] | Tavares S S M;Pardal J M;Lima L D et al.Characterization of Microstructure,Chemical Composition,Corrosion Resistance and Toughness of a Multipass Weld Joint of Superduplex Stainless Steel UNS S32750[J].Materials Characterization,2007,58:610. |
| [18] | Symniotis E .Galvanic Effects on the Active Dissolution of Duplex Stainless Steels[J].Corrosion,1990,40:2. |
| [19] | Michael Pohl;Oliver Storz;Thomas Glogowski .Effect of intermetallic precipitations on the properties of duplex stainless steel[J].Materials Characterization,2007(1):65-71. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%