Investigation of the wear failure mechanism of a flour milling roller

The stress condition and wear failure mechanisms of a flour milling roller have been investigated in this paper. The roller is worn by wheat, a soft abrasive, with the maximum shearing stress both on and beneath the surface. The wear mechanism of the roller consists of plastic fatigue and multi-impact fatigue wear in the matrix and brittle spalling in the carbides. The wear resistance is also affected by the process of cutting the teeth on the rollers. Higher wear resistance could possibly be ensured by using harder carbides and strengthened continuous matrix. © 1993.