The binder of cemented tungsten carbides was etched by chemical corrosion.In case the residual forces were not enough to hold the carbides, the carbides would disappear for abrading fatigue.

• 粘结剂(钴元素)丧失是硬质合金刀片磨损的根本原因，一旦残余粘结力不足以抵抗磨擦所产生的剪切力，碳化钨颗粒就会因疲劳而脱落。