The main invalidity of the refiner disc plate is the rounding of the bar edge in case of the plate has lower material rigidity andunwearable quality.

• 材料硬度低、耐磨性差的盘磨机磨片失效的主要形式是磨刀前对钝化磨圆,进而导致磨片剪切能力急剧下降。