抄録
The wear tests on several kinds of special cast steels, “Adamite” cast steel s and a “Ductile” cast iron were carried out, using a Nishihara's wear testing machine, the load being 20Kg, and the revolution slip 9.09% in the absence of lubricant.
The wear resistivities of the normalized cast steels containing 0.56-0.91% carbon increased with increases in both the hardness and the carbon content of the steel. In these cases, it was found that for the lower carbon steel, adhesive were firstly occured and followed by oxidation wear, while only oxidation wear for the higher carbon steel.
“Adamite” cast steels containing 1.46-2.26% carbon were mainly worn by abrasive wear, which resulted in less superior wear resistivities than those of the lower carbon cast steels. There was a contrary tendency such that their total wear loss increased with increases in the hardness and carbon content.
A “Ductile” cast iron (3.38%C) was found to have a far superior property than the others, owing to the protective lubrication of free graphite contained within itself.
