Advances in Production Engineering & Management
Volume 12 | Number 2 | June 2017 | pp 105–114
https://doi.org/10.14743/apem2017.2.243
Analysis of corrosion resistance when turning martensitic stainless steel X20Cr13 under chilled air-cooling
Kostadin, T.; Cukor, G.; Jakovljevic, S.
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A B S T R A C T
Amongst different methods of cooling in machining, application of air is considered to be the cleanest and most environmentally friendly one. The aim of this paper was to explore the possibility of chilled air-cooling considering the corrosion resistance when turning martensitic stainless steel X20Cr13. Thus, a comparison between an alternative cooling technique where compressed air is refrigerated and jetted to the cutting zone by means of Ranque-Hilsch counter-flow vortex tube and the conventional flood cooling with oil-in-water emulsion was done. The corrosion resistance was determined by electrochemical testing and the surface condition was analysed with both Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDS). From the results presented herein, it can be concluded that the specimen cooled with chilled air has better resistance to corrosion activity after a certain longer time in relation to the specimen cooled with emulsion. In addition, the specimen cooled with chilled air has lower surface roughness, which has a positive effect on the corrosion resistance. Hence, in the scope of environmentally friendly machining the vortex tube based chilled air-cooling can be successfully applied when turning difficult-to-cut martensitic stainless steel.
A R T I C L E I N F O
Keywords • Turning, Stainless steel X20Cr13, Corrosion resistance, Chilled air-cooling, Vortex tube
Corresponding author • Kostadin, T.
Article history • Received 3 February 2017, Revised 20 April 2017, Accepted 24 April 2017
Published on-line • 31 May 2017
E X P O R T C I T A T I O N
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