超硬合金の耐キャビテーション・***ージョン性

概要

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To study erosion resistance of WC-CO alloy in various environments, cavitation erosion tests were carried out in ion--exchanged water, HNO_3 Solution, HCI solution, NaOH solution and salt solution. The test results were compared with those of various steels and SUS 304 stainless steel in the same testing conditions. In ion-exchanged water, the erosion resistance of WC-Co alloy was superior to that of bulk materials. The erosion damage of WC-Co alloy increased slightly with increasing cavitation intensity. Therefore, WC-Co alloy shows an excellent erosion resistance under severe cavitation conditions in comparison with other materials. In many cases, the weight loss due to erosion damage increased with the corrosion of cobalt binder phase. Especially, the weight loss of WC-Co alloy was larger than that of SUS 304 stainless steel in HNO_3 Solution as well as in 10% NaOH solution. It was also pointed out that the weight loss of WC-Co alloy may increase considerably in such liquid containing a small amount of corrosive substance as water for industrial use.
社団法人日本材料学会の論文
1979-08-15