Grain Mill Knife Wear Optimization (original) (raw)

2020, Metal Science and Heat Treatment

The effect of heat treatment on the microstructure, hardness, and abrasive wear of the hammer mills knives made of steels EN 1.2080, 1.7225, 1.7131, and 1.1191 used in the grain crop processing into groats has been studied. The wear tests were performed using an "impeller-in-cup" type machine, and metallographic studies were performed using optical and scanning electron microscopy. A comparative analysis of the steel properties was performed. Steel EN 1.2080, which demonstrated the highest wear resistance, was recommended for knife manufacturing. The optimal heat treatment conditions for such steel were proposed.