INCREASE OF WEAR RESISTANCE OF Сr18Ni10Ti STAINLESS STEEL BY METHOD OF ELECTRIC-SPARK ALLOYING WITH ELECTRODES OF REFRACTORY METALS AND GRAPHITE

Abstract

The article presents the results of wear testing of stainless steel Cr18Ni10Тi treated with electrodes made of refractory metals and graphite by the method of electric-spark alloying. It was established that all electrospark coatings had a higher wear resistance than the Cr18Ni10Ti uncoated steel. Wear resistance of coatings was increased in the direction Mo + GraphiteTi + Ni W + Graphite Ti + Al + Graphite. X-ray diffraction analysis showed that molybdenum, tungsten, titanium carbides and other solid materials such as titanium nitride and nickel-titanium intermetallide are formed on the doped steel surfaces, which increased microhardness from 4.9 to 8 times and wear resistance from 1.63 to 29 times.