Toz Metalürjisi Yöntemiyle Üretilen 17-4 PH Paslanmaz Çeliklerde Mo Miktarının Korozyon Davranışlarına Etkisi

Yıl 2019, - Cilt:8 - IMSMATEC Özel Sayı, 98 - 104, 15.12.2019

Dursun Özyürek , İjlal Şimşek , Öznur Dincel Doğan Şimşek

https://doi.org/10.17100/nevbiltek.633780

Cited By: 2

Öz

Bu
çalışmada, toz metalürjisi yöntemi ile farklı oranlarda molibden ilave edilerek
üretilen 17-4 PH paslanmaz çelik alaşımların mikro yapı ve korozyon
davranışları incelenmiştir. Hazırlanan alaşım tozlar soğuk preslenerek (800
MPa) ham kompaktlar üretilmiştir. Üretilen ham kompaktlar 10-6 milibar vakumda
1300 °C’de 1 saat sinterlenerek, fırın ortamında oda sıcaklığına soğutulmuştur.
Üretilen numuneler taramalı elektron mikroskobu (SEM+EDS), X-ışını kırınımı
(XRD), yoğunluk ve sertlik ölçümleri ile incelenmiştir. Yapılan çalışmalar
sonucunda, 17-4 PH paslanmaz çeliğin yoğunluklarının artan Mo miktarı ile
birlikte arttığı, sertliklerinin ise azaldığı belirlenmiştir.

0000-0001-6542-8567

Anahtar Kelimeler

17-4 PH alaşımları, molibden, toz metalürjisi, mikro yapı, korozyon

Effect of Mo Amount on Corrosion Behavior of 17-4 PH Stainless Steels Produced by Powder Metallurgy Method

Öz

In this study, corrosion
behaviour of 17-4 PH stainless steel alloys was investigated which were
produced by powder metallurgy method by adding molybdenum at different amounts.
Prepared alloy powders were cold pressing (800 MPa) to produce green compacts.
Produced green compacts were sintered in 10^–6 mbar vacuum at 1300 °C
for 1 h and cooled down to room temperature in the furnace. Sintered components
were examined by scanning electron microscopy (SEM + EDS), X-ray diffraction
(XRD), and density and hardness measurements. As a result of the studies, it
was determined that density of 17-4 PH stainless steels increased with
increasing Mo amount and the hardness decreased with the addition of amount of
Mo.

Anahtar Kelimeler

17-4 PH alloys, molybdenum, powder metallurgy

Kaynakça

• Ping, L. I., Cai, Q. Z., Wei, B. K., Zhang, X. Z., “Effect of aging temperature on erosion-corrosion behavior of 17-4 PH stainless steels in dilute sulphuric acid slurry” Journal of Iron and Steel Research, International, 13(5), 73-78, 2006.
• Nalcacioglu, E., Ozyurek, D., Cetinkaya, K., “Investigation of the effect of molybdenum amount on wear behaviour of 17-4 PH stainless steel produced by powder metallurgy” Journal Of The Balkan Tribological Association, 22(1), 261-271, 2016.
• Wang, J., Zou, H., Li, C., Qiu, S., Shen, B., “The spinodal decomposition in 17-4PH stainless steel subjected to long-term aging at 350 °C” Materials Characterization, 59(5), 587-591, 2008.
• Tavares, S.S.M., Da Silva, F.J., Scandian, C., Da Silva, G.F., De Abreu, H.F.G., “Microstructure and intergranular corrosion resistance of UNS S17400 (17-4 PH) stainless steel” Corrosion Science, 52(11), 3835-3839, 2010.
• Bühler, H. E., Gerlach, L., Greven, O., Bleck, W., “The electrochemical reactivation test (ERT) to detect the susceptibility to intergranular corrosion” Corrosion Science, 45(10), 2325-2336, 2003.
• Greene, N. D., Fontana, M.G., “A critical analysis of pitting corrosion” Corrosion, 15(1), 41-47, 1959.
• Truman, J. E., Coleman, M. J., Pirt, K. R., “Note on the influence of nitrogen content on the resistance to pitting corrosion of stainless steels” British Corrosion Journal, 12(4), 236-238, 1977.
• Karaminezhaad, M., Sharafi, S., Dalili, K., “Effect of molybdenum on SCC of 17-4PH stainless steel under different aging conditions in chloride solutions” Journal of Materials Science, 41(11), 3329-3333, 2006.
• Gülsoy, H.Ö., Salman, S., Özbek, S., “Effect of FeB additions on sintering characteristics of injection moulded 17-4 PH stainless steel powder” Journal of Materials Science, 39(15), 4835-4840, 2004.
• Gülsoy, H.Ö., “Influence of nickel boride additions on sintering behaviors of injection moulded 17-4 PH stainless steel powder” Scripta Materialia, 52(3), 187-192, 2005.
• German, R.M. (1996), “Sintering theory and practice” Solar-Terrestrial Physics, Wiley-VCH, 568.
• Çetinkaya, C., “An investigation of the wear behaviours of white cast irons under different compositions” Materials & Design, 27(6), 437-445, 2006.
• Kalyon, A., Özyürek, D., Günay, M., Aztekin, H., “Dry sliding wear behaviours of valve seat inserts produced from high chromium white iron” High Temperature Materials and Processes, 34(7), 635-641, 2015.
• Wu, Y., German, R.M., Blaine, D., Marx, B., Schlaefer, C., “Effects of residual carbon content on sintering shrinkage, microstructure and mechanical properties of injection molded 17-4 PH stainless steel” Journal of Materials Science, 37(17), 3573-3583, 2002.
• Wu, Y., Blaine, D., Schlaefer, C., Marx, B., German, R.M., “Sintering densification and microstructural evolution of injection molding grade 17-4 PH stainless steel powder” Metallurgical and Materials Transactions A, 33(7), 2185-2194, 2002.
• Salahinejad, E., Hadianfard, M.J., Ghaffari, M., Mashhadi, S.B., Okyay, A.K., “Liquid-phase sintering of medical-grade P558 stainless steel using a new biocompatible eutectic additive” Materials Letters, 74, 209-212, 2012.
• Szewczyk-Nykiel, A., “The influence of molibdenum on corrosion resistance of sintered austenitic stainless steels” Czasopismo Techniczne, (Mechanika Zeszyt 4-M (26) 2015), 131-142, 2016.