Wear tests of materials for FBR in sodium environment (IV); Friction and wear of Stellite No.1, Colmonoy No.6, Inconel 718, Hastelloy C and 2.25Cr-1Mo steel

Kano, Shigeki; not registered; Namekawa, Masaru; Nakayama, Koichi; Atsumo, Hideo

A series of wear tests in sodium have been carrying out to develop and screen friction and wear resistant materials for siliding components of the sodium cooled reactor. The present study was carried out about various combinations of stellite No.1, Colmonoy No.6, Inconel 718, Hastelloy C and 2.25Cr-1Mo Steel. The tests yielded the following results. (1) Colmonoy No.6 was the only material that decreased in hardness after tested. The higher the temperature was, the lower became the static friction coefficient () of Colmonoy No.6 alone. (2) The kinetic friction coefficient () of Stellite No.1 vs. Stellite No.1 was comparatively as high as 0.5, but it became lower (0.12) in case the mating material was Colmonoy No.6. The -value of Colmonoy No.6 vs. Colmonoy No.6 was as low as 0.2. These material combinations scarcely wore. (3)The -value of inconel 718 vs. Inconel 718 was as low as 0.3, but this combination wore under load more than 300 kg. (4) The -value of Hastelloy C vs. Hastelloy C was as low as 0.23, but this combination started to wear under low load. (5) Both the values of and of 2.25Cr-1Mo steel vs. 2.25Cr-1Mo steel were higher than 0.5, and the plastic deformation was raised at the sliding surface. This combination showed the most wear loss of all material combinations tested.