LAZER KAYNAĞI İLE BİRLEŞTİRİLEN AISI 2205 DUBLEKS PASLANMAZ ÇELİĞİN MEKANİK VE MİKROYAPI ÖZELLİKLERİNİN İNCELENMESİ

Yıl 2016, Cilt: 11 Sayı: 4, 98 - 109, 13.10.2016

CEYHUN Köse , RAMAZAN Kaçar

Öz

Bu çalışmada, AISI 2205 dubleks paslanmaz çelik levhalar CO₂ lazer ışını kaynak yöntemiyle %50 Ar + %50 He gaz korumalı ortamda, 4000W lazer gücüyle ve 90cm/dk kaynak hızıyla birleştirilmiştir. Kaynaklı birleştirmelerin mekanik özelliklerini belirleyebilmek için çekme ve çentik darbe testleri uygulanmıştır. Kaynaklı bağlantının sertlik ölçümü kaynak yönüne dik kesitten gerçekleştirilmiştir. Mikroyapı karakteristikleri ise Optik mikroskop, Taramalı Elektron Mikroskobu (SEM), Enerji Dağılımlı X-Işını Spektroskopisi (EDS) ve XRD vasıtasıyla incelenmiştir. Sonuç olarak, CO₂ lazer kaynak yöntemi ile birleştirilen dubleks paslanmaz çelik kaynak metali ve ısı tesiri altındaki bölgenin (ITAB) düşük ısı girdisine bağlı yüksek soğuma oranından etkilenerek final yapısının ferrit lehine değiştiği tespit edilmiştir. Kaynaklı birleştirmenin mekanik özellikleri kabul edilebilir değerlerde bulunmuştur.

Anahtar Kelimeler

Paslanmaz Çelik, AISI 2205, CO2 Lazer Kaynağı, Mekanik Özellikler, Mikroyapı

Kaynakça

• Yang, S.M., Chen Y.C., Pani Y.T., and Lin, D.Y., (2016). Effect of Silver on Microstructure and Antibacterial Property of 2205 Duplex Stainless Steel, Materials Science and Engineering: C, Vol:63, 376-383.
• Warren, A.D., Harniman, R.L., Guo, Z., Younes, C.M., Flewitt, P.E.J., and Scott, T.B., (2016). Quantification of Sigma-Phase Evolution in Thermally Aged 2205 Duplex Stainless Steel, Journal of Materials Science, Vol:51, 694-707.
• Lippold, J.C. and Varol, I., (1997). Characterization of Weld Solidification Cracking in a Duplex Stainless Steel, Materials Characterization, Vol:39, 555-573.
• Garcia, R.L., Portero, M.J., and Anton, J., (2010). Corrosion Behaviour of Sensitized and Usensitized Alloy 900 (UNS 1.4462) in Concentrated Aqueous Lithium Bromide Solutions and Different Temperatures, Corrosion Science, Vol:52, 950-959.
• Karahan, T., Ertek Emre, H., Tümer, M., and Kaçar, R., (2014). Strengthening of AISI 2205 Duplex Stainless Steel by Strain Ageing, Materials and Design, Vol:55, 250-256.
• Kısasöz, A. and Karaaslan, A., (2014). Finite Element Analysis of 2205 Duplex Stainless Steel Welds, Materials Testing, Vol:10, 795-799.
• Odabaş, C., (2002). Paslanmaz Çelikler, Temel Özellikleri, Kullanım Alanları, Kaynak Yöntemleri, Askaynak, İstanbul.
• Kou, S., (2003). Welding Metallurgy, Second Editon, A John Wiley & Sons, INC., Publication.
• Singh, C.S., Zeng, H., Guo, C., and Cai, W., (2012). Lasers: Fundametals, Types and Operations, Nanomaterials: Processing and Characterization With Lasers, First Edition, Wiley-VCH Verlag GmbH & Co.
• Köse, C. and Kaçar, R., (2015). Effect of Welding Speed on The Mechanical Properties and Microstructure of Laser Welded AISI 316L Stainless Steel, Journal of the Faculty of Engineering and Architecture of Gazi University, Vol:30, 225-235.
• Köse, C. and Kaçar, R., (2014). Mechanical Properties of Laser Welded 2205 Duplex Stainless Steel”, Materials Testing, Vol:56, 779-785.
• Köse, C. and Kaçar, R., (2015). An Investigation of CO2 Laser Beam Welding Method of AISI 420 Martensitic Stainless Steel, Technological Applied Sciences, Vol:10, 13-17.
• Köse, C. and Kaçar, R., (2014). The Effect of Preheat & Post Weld Heat Treatment on the Laser Weldability of AISI 420 Martensitic Stainless Steel, Materials and Design, Vol:64, 221-226.
• Köse, C., Kaçar, R., Zorba, A.P., Bağırova, M., and Allahverdiyev, A.M., (2016). The Effect of CO2 Laser Beam Welded AISI 316L Austenitic Stainless Steel on the Viability of Fibroblast Cells, In Vitro, Materials Science and Engineering: C, Vol:60, 211-218.
• Köse, C., and Kaçar, R., (2016). In Vitro Bioactivity and Corrosion Properties of Laser Beam Welded Medical Grade AISI 316L Stainless Steel in Simulated Body Fluid, International Journal of Electrochemical Science, Vol:11, 2762-2777.
• Köse, C., (2016). An Investigation of the Surface Characterization of Laser Surface Remelted and Laser Beam Welded AISI 316L Stainless Steel, International Journal of Electrochemical Science, Vol:11,3542-3554.
• Taskin, M., Caligulu, U., and Turkmen, M., (2011). X-Ray Tests of AISI 430 and 304 Stainless Steels and AISI 1010 Low Carbon Steel Welded by CO2 Laser Beam Welding, MP-Materials Testing-Materials and Components Technology and Application, Vol:53, 741-747.
• Karaaslan, A., (2009). Laser ile Malzeme İşlemleri, Literaür Yayınları, İstanbul.
• Shahinian, P., (1978). Fatigue and Creep Crack Propagation in Stainless Steel Weld Metal. Welding Research Supplement.
• El-Batahgy, A., (1997). Effect of Laser Welding Parameters on Fusion Zone Shape and Solidification Structure of Austenitic Stainless Steels”, Materials Letters, Vol:32, 155-163.
• El-Batahgy, A., Khourshid, A., and Sharef, T., (2011). Effect of Laser Beam Welding Parameters on Microstructure and Properties of Duplex Stainless Steel, Materials Sciences and Applications, Vol:2, 1443-1451.
• Mourad, H.I., Khourshid, A., and Sharef, T., (2012). Gas Tungsten Arc and Laser Beam Welding Processes Effects on Duplex Stainless Steel 2205 Properties, Materials Science and Engineering A, Vol:549, 105– 113.
• Clark, C.A. and Guha, P., (1982). Welding Characteristics of Duplex Steels, Duplex Stainless Steels, American Society for Metals, Metals Park, Ohio, 631-647.
• Badji, R., Bouabdallah, M., and Bacroix, B., (2008). Phase Transformation and Mechanical Behavior in Annealed 2205 Duplex Stainless Steel Welds, Materials Characterization, Vol:59, 447-453.