ABSTRACT
The aims of this research are to improve chopper machine performance and evaluate three steel types (AISI 304 ,Bohler K100 and
Honing steel) coated by Nano chromium solution. Coating with Nano
chromium solution was used to increase the sharpness of the rotating cutting knives .Results showed that the maximum machine productivity (338 kg/h) was obtained by using AISI 304 with speed of 1400 rpm (29.31 m/s) and moisture content 13.40% meanwhile, the minimum machine productivity (118 kg/h) was obtained by using honing steel knives with speed of 800 rpm (16.76 m/s) and moisture content 24.36%.
The energy requirements of chromium coated honing steel knives were
higher than AISI 304 and Bohler K100 steel knives. Whereas, the minimum production cost (70.80 EGP/Mg) at moisture content 13.40% and knives speed 1400 rpm (29.31 m/s)