Stress state in the surface layers of steel R6M5 after electrospark and laser treatment

Laser irradiation of the electrospark alloyed surface of high-speed steel p roduced remelting of the surface layer and formation of a broad structure t ransition zone. This optimized the gradient of properties at the surface. L aser treatment of the electrospark coatings produced tensile stresses in th e surface layers, whose magnitude and distribution were dependent on the tr eatment conditions, as well as the physico-chemical interaction of the refr actory compound with molten steel in the liquid pool formed by irradiation.