(Хмельницький національний університет, 2019) Gonchar, V.; Kaplun, P.; Rudyk, O.; Matviishen, P.; Гончар, В.А.; Каплун, П.В.; Рудык, А.Е.; Матвиишин, П.В.
The article highlights the results of experimental research of the wear resistance of different structures
of steels with different thermal and chemical-thermal treatment in corrosive and abrasive medium on special
friction machines that modelled the working conditions of the extrudes when processing feed grain with the
additives of saponite. Comparative study showed that metal wear resistance in corrosive and abrasive medium at
higher temperatures depends not only on the hardness of friction surface, but also on its structure, phase
composition and hardness of gradient change in the depth of the hardened layer. To provide extruder’s high wear
resistance when manufacturing feed grain mixed fodder with the additives of saponite it is recommended to
make the details of extruding assembly unit of steel 5 that is strengthened by nitrohardening.