اثر ریزساختار بر رفتار سایشی گلوله‌های آسیاب از جنس چدن پرکروم

Effect of microstructure on wear behavior of

high Chromium cast iron milling balls

اثر ریزساختار بر رفتار سایشی گلوله‌های آسیاب از جنس چدن پرکروم

ABSTRACT

In milling and grinding of minerals, balls which can be made of high chromium white cast iron are loaded into the milling container. Under the operating conditions of milling, the balls are subjected to impact, rolling, fatigue and corrosion wears which cause fracture and deforming the balls [1,2]. Since the wear conditions are unchangeable and inevitable, control of the ball dimensions, ball material, alloying and heat treatment must meet the required conditions to provide good wear and erosion resistance [3,4]. Generally, the balls are chosen from high chromium cast iron to provide hard carbide within the martensitic matrix with a little retained austenite to result in the best wear resistance for the operating conditions of the balls [5].