ارزیابی خواص اتصال غیر مشابه فولاد زنگ نزن سوپر دوفازی UNS S32750 به فولاد کم آلیاژ استحکام بالای API X65

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناسی ارشد، دانشکده مهندسی مواد، دانشگاه صنعتی اصفهان

2 استاد، دانشکده مهندسی مواد، دانشگاه صنعتی اصفهان

3 دانشیار، دانشکده مهندسی مواد، دانشگاه صنعتی اصفهان

چکیده

خواص عالی فولادهای زنگنزن سوپر دوفازی مدیون بالانس ریزساختار دوگانه فریتی - آستنیتی آن‎هاست در حالیکه در طی جوشکاری این فولادها ، نسبت مطلوب آستنیت – فریت از بین می‌رود و فازهای مضری نیز تشکیل می‌شود. در این پژوهش فولاد زنگ نزن سوپر دوفازی UNS 32750 به فولاد کم آلیاژ استحکام بالای API X65 به روش جوشکاری قوسی تنگستن - گاز اتصال داده شد و به منظور ارزیابی خواص فلز جوش، از آزمون‌های استحکام ضربهای، پلاریزاسیون پتانسیودینامیک و سیکلی استفاده شد. همچنین رفتار خوردگی گالوانیکی بین زوج گالوانیکی فلز جوش و فولاد کم آلیاژ استحکام بالا به کمک تکنیک ZRA تعیین شد. نتایج نشان داد که میزان آستنیت فلز جوش بیشتر از فلز پایه و فاز مضری در آن به وجود نیامده است. استحکام ضربه‌ای فلز جوش بیشتر از فلزات پایه است، همچنین رفتار خوردگی فلز جوش شبیه به فلز پایه زنگ نزن سوپر دوفازی و بسیار بهتر از فولاد کم آلیاژ استحکام بالا بود. نتایج آزمون ZRA نیز نشان داد که در زوج گالوانیکی فلز جوش - فولاد کم آلیاژ استحکام بالا، فولاد کم آلیاژ استحکام بالا دچار خوردگی می‌شود و مکانیزم آن از نوع خوردگی حفره‌ای است.

کلیدواژه‌ها

عنوان مقاله [English]

Evaluation of dissimilar joint properties between UNS S32750 and API X65

نویسندگان [English]

  • Majid Sadeghian 1
  • Morteza Shamanian 2
  • ALI SHAFYEI 3
چکیده [English]

The excellent properties of super duplex stainless steels (SDSS) are mainly due to their balance of ferrite - austenite since this balance is highly likely to change during welding and undesirable phases can create. In this work gas tungsten arc welding (GTAW) process was used to join UNS S32750 SDSS to API X65 high strength low alloy (HSLA) steel. The properties of weldments were investigated by impact test, potentiodunamic and cyclic polarization tests. Zero resistance ammeter (ZRA) tests also were used for investigation of behavior of galvanic corrosion on weld metal – HSLA base metal. Results indicated that amount of austenite in weld metal was higher than SDSS base metal and did not created undesirable phases. Toughness of weldment was higher than base metals and corrosion behavior of weld metal was alike SDSS base metal and presented excellent corrosion resistance comparing HSLA base metal. The results of ZRA showed that HSLA eroded in galvanic couple weld metal – HSLA and mechanism of corrosion was pitting corrosion.

کلیدواژه‌ها [English]

  • Super duplex stainless steel
  • high strength low alloy steel
  • Welding
  • Toughness
  • corrosion behavior

مراجع

[1] Muthupandi, V.; BalaSrinivasan, P., Seshadri, S.K., and Sundaresan, S., “Effect of weld metal chemistry and heat input on the structure and properties of duplex stainless steels”, Materials Science and Engineering A, Vol. 358, pp. 9– 16, 2003.
[2] Tan, H.; Jiang, Y.; Deng, B.; Sun, T.; Xu, J.,
and Li, J., “Effect of annealing temperature on the pitting corrosion resistance of super duplex stainless steel UNS S32750”, Materials Characterization, pp. 1049- 1054, 2009.
[3] El-Yazgi, A.A.; and Hardie, D., “Stress Corrosion Cracking of Duplex and Super Duplex Stainless Steels in Sour Environments”, Corrosion Science, Vol. 40, No. 6, pp. 909- 930, 1998.
[4] Cui, Z.D.; Wu, S.L., Zhu, S.L., and Yang, X.J., “Study on Corrosion Properties of Pipelines in Simulated Produced Water Saturated with Supercritical CO2”, Applied Surface Science, Vol. 252, No. 6, pp. 2368-2374, 2006.
[5] Smith, L., “A Guideline to the Successful Use of Duplex Stainless Steels for Flowlines”, Stainless Steel World, Duplex America Conference – KCL Publishing BV, DA2-102, pp. 1- 16, 2000.
[6] Hussaina, E., and Husain, A., “Erosion-Corrosion of Duplex Stainless Steel under Kuwait Marine Condition”, Desalination, Vol. 183, No. 1-3, pp. 227- 234, 2005.
[7] Kotecki D.J.; and Lippold J.C. , “Welding Metallurgy and Weldability of Stainless Steels”, John Wiley, Hoboken, New.
[8] Practical Guidelines for the Fabrication of Duplex Stainless Steels, International Molybdenum Association, London, 1999.
[9] Sandvik Materials Technology, “Welding Guidelines for SAF 2507, Revision 1”, http://www2.sandvik.com, 2011.
[10] Ramazan Kacar; Orhan Baylan, “An investigation of microstructure / property relationships in dissimilar welds between martensitic and austenitic stainless steels”, Materials and Design, Vol. 25, pp. 317- 329, 2004.
[11] Xiaoyan, W., Lei, Z., Xianren, K., and Minxu, L., “Microstructure and galvanic corrosion of dissimilar weldment between duplex stainless steel UNS 31803 and X80 steel”, ASME 28th International Conference on Ocean, Offshore and Arctic Engineering (OMAE), Honolulu, Hawaii, USA, 2009.
[12] Bravo, I.M.; Zepeda, C.M.; Hernandez, A.A.,
and Piedras, E.R., “Dissimilar welding of super duplex stainless steel/HSLA steel for offshore applications joined by GTAW”, Engineering, pp. 520- 528, 2010.
[13] Barnhouse, E.J.; and Lippold, J.C.,
“Microstructure / Property Relationships in Dissimilar Welds Between Duplex Stainless Steels and Carbon Steels”, Welding Journal, Vol. 77, No. 12, pp. 477s- 487s, 1998.
[14] Wang, S., Ma, Q., and Li, Y.,
“Characterization of Microstructure, Mechanical Properties and Corrosion Resistance of Dissimilar Welded Joint between 2205 Duplex Stainless Steel and 16MnR”, Materials and Design, Vol. 32, pp. 831– 837, 2011.
[15] S.S.M. Tavares, J.M. Pardal, L.D. Lima, I.N. Bastos, A.M. Nascimento; J.A. de Souza,
“Characterization of microstructure, chemical composition, corrosion resistance and toughness of a multipass weld joint of superduplex stainless steel UNS S32750”, Materials Characterization, Vol. 58, pp. 610 –616, 2007.
[16] J. Labanowski, “Mechanical properties and corrosion resistance of dissimilar stainless steel welds”, Archives of Materials Science and Engineering, pp. 27- 33, Volume 28, Issue 1, 2007.
[17] J. Labanowski, “Stress corrosion cracking susceptibility of dissimilar stainless steels welded joints”, Journal of Achievements in Materials and Manufacturing Engineering, VOLUME 20, ISSUES 1- 2, 2007.
[18] Structural Steel Welding Code, American Welding Society, 1992.
[19] ASM Handbook, Volume 9, Metallography and Microstructures, 2004.
[20] A 923– 03: Standard Test Methods for Detecting Detrimental Intermetallic Phase in Duplex Austenitic / Ferritic Stainless Steels, ASTM Standard, 2003.
[21] E23- 02a: Standard Test Methods for Notched Bar Impact Testing of Metallic Materials, ASTM Standard, 2002.
[22] G5-48-R03: Standard Test Methods for Pitting and Crevice Corrosion Resistance of Stainless Steels and Related Alloys by Use of Ferric Chloride Solution، ASTM Standard، 2004.
[23] G61: Standard Test Method for Conducting Cyclic Potentiodynamic Polarization Measurements for Localized Corrosion Susceptibility of Iron-, Nickel-, or Cobalt-Based Alloys, ASTM Standard، 2004.
[24] G150-99-R04: Standard Test Method for Electrochemical Critical Pitting Tempereture Testing of Stainless Steels, ASTM Standard, 2004.
[25] Cervo, R.; Ferro, P.; and Tiziani, A., “Annealing temperature effects on super duplex stainless steel UNS S32750 welded joints I: microstructure and partitioning of elements”, Journal of Materials Science, Vol. 45, pp. 4369- 4377, 2010.
[26] Kordatos, J.D., Fourlaris, G., and Papadimitriou, G., “The effect of cooling rate on the mechanical and corrosion properties of SAF 2205 (UNS S32803) duplex stainless steel welds”, Scripta Materiala, Vol. 44, pp. 401- 408, 2001.
[27] Hermas, A.A., Ogura, K., Takagi, S., and Adachi, T., “Effect of alloying additions on corrosion and passivation behaviors of type 304 stainless steel”, Corrosion, Vol. 51, pp. 3-10, 1995.
[28] Lioyd, A.C.; Noel, J.J., Mcintyre, S., and Shoesmith, D.W., “Cr, Mo and W alloying additions in Ni and their effect on passivity”, Electrochemical Acta, Vol. 49, pp. 3015- 3027, 2004.
[29] Liou, H.Y.; Pan, Y.T., Hsieh, R.L., and Tsai, W.T., “Effects of alloying elements on the mechanical properties and corrosion behaviors of 2205 duplex stainless steels”, Journal of Materials Engineering and Performance, Vol. 10, pp. 231- 241, 2001.
[30] Blasco-Tamarit, E.; Igual-Munoz, A.; and Garcia-Antton, J., “Galvanic corrosion of high alloyed austenitic stainless steel welds in LiBr systems”, Corrosion Science, Vol. 49, pp. 4452- 4471, 2007.
[31] Sanchez-Tovar, R., Montanes, M.T., Garcia-Anton, J.; and Guenbour, A., “Galvanic Corrosion of the Base AISI 316l/Micro-Plasma Arc Welded AISI 316l in Polluted Phosphoric Acid Media at Different Temperatures”, Int. J. Electrochem. Sci., Vol. 6, pp. 3656- 3670, 2011.
[32] Blasco-Tamarit; E., Igual-Munoz, A., Garcia Anton, J. and Garcia-Garcia, D.M., “Galvanic corrosion of titanium coupled to welded titanium in LiBr solution at different temperatures”, Corrosion Science, Vol. 51, pp. 1059- 1102, 2009.

فایل ها

هم رسانی

ارجاع به این مقاله

آمار