1 results listed
The aim of the study is searching for the best parameters for St-37 steel surface by Electro Spark Deposition (ESD) method with using Inconel
718 alloy electrode. ESD process was carried out in different voltages (30-62 volt), different frequents (75-130 Hz) and different atmosphere
(in air and in silicon oil pool). For varying electrical and ambient conditions, samples were prepared and their coating thickness (9,30 µm -
14,39 µm) and surface roughness (2,043 µm - 5,891 µm) values were measured. The coating thickness was determined higher in the air
experiments. Also, thickness and roughness values were increased with the increased voltage, but there were not certain effect of the frequent
on thickness and roughness. In addition, SEM images, linear and local EDX analysis, cross-sectional hardness test and XRD analysis were also
obtained. It was detected that all coatings have iron-nickel based alloys and CrFe alloy were found in silicon oil pool experiments. Moreover,
the cross-sectional hardness tests presented that the coating is two times harder than the steel substrate. By the SEM experiments, it was
determine that coating layer had micro pores and good bonding with substrate.
International Iron & Steel Symposium
UDCS
Mustafa Safa YILMAZ
Kemal Korkmaz
ALİ ÇAKIR
Cengiz DOGRU