Experimental Research of Variability of Surface Energy Value of Fe37-3FN, C45 and 41Cr4 Steels

摘要

The work has been undertaken with a view to establish a mechanism for determining the change in the value of a surface energy depending on the technological action modes during edge cutting machining of structural materials. Such volatility leads to variability in the products operational properties, like wear resistance and durability. Parts surface energy is taken into account when conducting various technological operations, such as welding, soldering, gluing, applying protective coatings, etc in the course of production, operation and repair. Meanwhile, this problem is rather complicated, since the surface energy variability of the same materials has been noted. The dependence between technological parameters while producing the parts and their surface energy value has been determined. The energetic state analysis of the mating surfaces contact area sections obtained at various feeding speeds has been implemented. The measurements were being performed by recording the contact potential difference via nonvibrating capacitor method. The electronic work function of the samples under investigation was being calculated according to the relationship known in the theoretical physics. The surface energy was being determined by means of dependencies proposed by Kunin L.L. Dependences of the accumulated surface energy value on the feed while milling the steels Fe37-3FN, C45 and 41Cr4 have been obtained. An identical nature of the feed rate influence on the surface energy value of different steel grades has been identified. This will make it possible to choose the appropriate cutting modes in the course of technological process in order to achieve the required level of condensed systems surface energy. The article materials can be useful for development of the technology that provides high operational characteristics of the products made of structural materials.