The article presents the gradient of microhardness changes as a function of the distance from the material surface after turning with 142 a wedge provided with a coating with a ceramic intermediate layer.The investigation comprised the influence of cutting speed on surface integrity microhardness in dry machining.The tested material was duplex stainless steel (DSS) with two-phase, ferritic-austenitic structure.
The tests have been performed under production conditions during machining of parts for electric motors and Crankshaft Bearings deep-well pumps.