Laser surface treatment of AISI 304 steel with the presence of B4C particles at the surface

Improving the Efficiency of Drilling and Blasting Operations for High Water Cut Conditions

“…The highest water cut on the Kola Peninsula deposits is in the Koashvinsky pit of the East mine; the maximum values of water inflow are 11,000 m 3 /hour. According to the hydrogeological service of the East mine, on average, annually up to 37.2 million m 3 of water is drained with pumps, and up to 18.2 million m 3 of water is removed by draining boreholes [2,3].…”

“…So in their papers, Kozyrev S.A. and Alenicheva I.A. [1,2,4,5] studied the mechanisms of explosive destruction of water-saturated rocks for the conditions of the Koashvinskoye field. Samples of apatite-nepheline rocks are analyzed, and the effect of water adsorption on the surface of the rock particles is observed, which creates conditions for their sliding against each other and leads to a decrease in the strength characteristics of the ore compared to the dry state.…”

Archives of Metallurgy and Materials

“…Enhanced wear resistance and thermal fatigue resistance is achieved by creating a chemically homogenous, fine-crystalline surface layer without altering the chemical composition of the material. Even more advantageous effects, such as improved functional properties, are achievable by alloying a material surface layer with the particles of hard phases of carbides, oxides or nitrides [7][8]. Studies in the field of laser remelting, alloying and hardfacing conducted at home and abroad are focussed on the treatment of high-speed steels and machine steels by means of continuous and pulsed CO 2 gas lasers and solid-state lasers.…”