Affiliation:
1. Department of Materials and Fabrication Engineering, Politehnica University Timisoara, Bulevardul Mihai Viteazul nr.1, 300222 Timișoara, Romania
2. Department of Mechanical Machines, Equipment and Transports, Politehnica University Timisoara, Bulevardul Mihai Viteazul nr.1, 300222 Timisoara, Romania
Abstract
Fe-Mn-Cr-Ni alloys like Citomangan, delivered in the form of powders, tubular wires, and coated electrodes, are intended for welding deposition operations to create wear-resistant layers. Their main characteristic is their high capacity for surface mechanical work-hardening under high shock loads, along with high toughness and wear resistance. In order to increase the resistance to cavitation erosion, hardfacing of Duplex stainless steel X2CrNiMoN22-5-3 with Citomangan alloy was performed using a new welding technique, namely one that uses a universal TIG source adapted for manual welding with a coated electrode in pulsed current. Cavitation tests were conducted in accordance with the requirements of ASTM G32—2016 standard. Comparing the characteristic cavitation erosion parameters of the manganese austenitic layer, deposited by this new welding technique, with those of the reference steel, highlights an 8–11 times increase in its resistance to cavitation erosion. Metallographic investigations by optical microscopy and scanning electron microscopy (SEM), as well as hardness measurements, were carried out to understand the cavitation phenomena.
Funder
Romanian Ministry of Education and Research, CNCS–UEFISCDI
Reference24 articles.
1. Whitesides, R.W. (2012). Interesting Facts (and Myths) about Cavitation, PDHonline.
2. Zhao, J., Ning, L., Zhu, J., and Li, Y. (2021). Investigation on Ultrasonic Cavitation Erosion of Aluminum–Titanium Alloys in Sodium Chloride Solution. Crystals, 11.
3. Carlton, J. (2012). Marine Propellers and Propulsion, Butterworth-Heinemann. [2nd ed.]. Chapter Cavitation.
4. Ghose, J.P., and Gokarn, R.P. (2004). Basic Ship Propulsion, Allied Publishers. Chapter Propeller Materials.
5. Fitch, E.C. (2024, January 10). Machinery Lubrication. Chapter Cavitation Wear in Hydraulic Systems. Available online: http://www.machinerylubrication.com/Articles/Print/380.