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