Reducing the Porosity of Powder Metallurgy Products by Laser Radiation

The wear resistance of road milling cutter tips produced using powder metallurgy is examined. The structural components of the tip are determined using the barite method. It is found that after laser processing of the tip surface, the number of pores in the cutter decreases. Wear tests were conducted on the designed setup. The setup allows simulating the operation of a road milling machine and studying the wear of up to three cutters simultaneously. Wear was determined using the gravimetric method. The depth of the worn layer during testing was 150 mm. As a result of wear tests, it was established that the cutter whose tip was subjected to laser processing wore less than the tip that was not laser processed. It is assumed that a decrease in the number of pores in the surface layer of the cutter increases its wear resistance as a result of fusion of the metal base at a certain depth from the surface with subsequent closure of the pores.