16. Conclusions
Experimental results show that the friction surfacing could be used as a method for obtaining coatings of dissimilar materials. Friction surfacing is the best method for obtaining deposits of stainless steel over ductile iron for critical applications. Adequate bond strength and good coating integrity of deposit is obtained by optimizing of process parameters. The deposit observed by the microscope showed dense, clear and fine microstructure of ferrite and pearlite on ductile iron side which clearly proves the superiority of the process. There were no cracks observed in the HAZ, showing the suitability of the parameters selected to give controlled heat input. Integrity of the deposit is excellent with good metallurgical bond.
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