engleski

Resistance of thin layers in abrasion under high pressures

Testing of thin layers was done by two procedures: I – in a laboratory according to ASTM G 65-94, and II – in practice on knives of screw (worm) presses used for oil extraction from oil seeds. The influence of hardness change from the beginning of the sub-layer towards the core is very important, which is indicated by greater resistance of vanadium, SiC+DLC and carburised knives as compared to CrN and boron treated knives which have a sub-layer with much smaller hardness. It has been concluded that by the application of multilayer SiC+DLC and duplex procedure created vanadium layer can be accomplished approximately 3x smaller mass loss. Based on the conclusion, these two layers can be recommended on those parts where dimensional wear criterion is max. 0.1 mm.

thin layers; high pressure; abrasive SiO2; wear resistance; dimensional wear criterion

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