Author
Abstract
In this work, arc spray coating of 13% Cr-steel (BS403S17) has been used in
repair of nodular cast iron journals. This study discusses the processing factors
effecting the roughness, hardness,and wear resistance of coating produced by
arc spraying. The studied factors are applied voltage, wire feed rate, spraying
distance (distance between gun nozzle and substrate) and coating thickness. All
coated samples were tested using pin on ring wear testing machine.
The final results showed that the best voltage in this application is between 28
and 30 V. With this voltage a reduction in wear rate of about 8% can be
obtained. The research reveals that the wear rate decreases by 46% with
increasing in wire feed rate from 68 to 122 mm/s and it is found that the best
spraying distance is about 10 to15 cm to get a good coating surfaces with
reduction by about 58% in wear rate. It is also approved that coating thickness
has positive effect on reducing wear rate by 43%.
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