On the study of wear phenomenon of steel against soil. (III)

Abstract

Durableness steels such as SK, SUP, SKS, SMnL, SCMn and FCW was studied. Durability of steel against wear increases with the amount of carbon content, if the other condition is constant. Silicium is not effect upon the durability. Increasing content of Silicium in steel makes rather decrease of the durability but little. Manganese is desirable for the durability of steels at an experimental extent. In the case of carbon steel having same composition, the durability of each steels shows the same value, if each hardness value of quenched and as rolled condition is same. Chromium and tungsten brings good effect, but the enfluence of tungsten is not great as carbon. Hardness of annealed SMnL is low and the amount of loss in weight by abrasion is large, and the amount is large about as from seventy to eighty per cent of quenched one. The mean value of abrasion of SCMn, FCW and SK 5 were compared with respectively. In the case of the humidity and the granulation of soil, and the running velocity of sample were constant, the mean value of abrasion of each samples changes with the running distance keeping almost linear relationships. The mean value of abrasion of 0.85 per cent of carbon steel shows maximum value, the value of heat treated manganese steel shows about one twoth of it and that of white pig iron about one threeth.