Research of wear of working surfaces of a diamond tool at the elimination of emergency situations in areas of destruction of building structures

The mechanisms of wear of the diamond tool during the elimination of emergency situations connected with the destruction of building structures for the cutting of concrete constructions have been investigated. It is established that in the conditions of cutting the temperature in the zone of frictional contact of crystals of diamond with concrete rises to 1700 K. This leads to the introduction of products of wear in the channels of microcracks on the surface of the crystal and the formation of an impaired surface layer, in which the main cracks that destroy the crystal originate. Thus, the leading mechanism of the wear of diamond crystals – fragile destruction – is accompanied by mechanisms of fatigue failure and adhesion wear.