Electrochemical Evaluation of AISI 420 Steel after Several Heat Treatments |
| M.G. Minciunaa, b, D.C. Achiteia, b, P. Vizureanua, b, A.V. Sandua, c, M. Nabialekd
aGheorghe Asachi Technical University of Iasi, Faculty of Materials Science and Engineering, Blvd. D. Mangeron 41, 700050, Iasi, Romania bCenter of Excellence Geopolymer & Green Technology (CEGeoGTech), School of Materials Engineering, Universiti Malaysia Perlis, 01000 Kangar, Perlis, Malaysia cRomanian Inventors Forum, Sf. P. Movila 3 Str., Iasi, Romania dInstitute of Physics, Faculty of Production Engineering and Materials Technology, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland |
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| The paper deals with the study of the electrochemical behavior of a heat treated AISI 420 martensitic stainless steel, usually used on surgical instruments. According to the alloy composition we designed the heat treatment procedures with specific parameters in order to enhance the properties of the alloy. The heat treatments involved are: Annealing at 770° with maintaining 20 min followed by slow cooling in furnace; martensitic quenching at 1000° with maintaining 30 min followed by rapid cooling in water, and high tempering at 700° with maintaining for 60 min followed by free cooling in open air. The characterization of electrochemical behavior of AISI 420 steel was done in a 0.5 M NaCl aqueous solution. The study concluded that by applying high tempering a decrease of hardness and an increase of mechanical properties is obtained. Also high tempering induces a better corrosion resistance for our studied alloy. |
DOI:10.12693/APhysPolA.135.115 topics: AISI 420 steel, heat treatments, electrochemical impedance spectroscopy, enhanced corrosion resistance |