WEAR TESTING OF IRON-BASED AND COBALT-BASED ALLOYS IN SIMULATED PULP AND PAPER-MILL ENVIRONMENTS

The wear performance of four alloys was evaluated in two environments typical of the pulp and paper industry. The environments simulated woo d sliding on metal in white water and metal sliding on metal in kraft white liquor. For wood on metal, two stainless steels gave the best ov erall performance. For metal on metal, a cobalt alloy and a duplex ste el had significantly better performance than Type 304L in the absence of sand. Only the cobalt alloy retained the improved performance when sand was present. Wear of the Type 416 counter surface against the cob alt alloy was generally comparable to its performance rubbing against Type 304L.