Wear tests of materials for FBR in sodium environment (VI); Long term sliding test results

Hasegawa, Naruo; Kano, Shigeki; Nakayama, Koichi; Koakutsu, Toru; not registered; Nakasuji, Takashi

A series of experiments in sodium and argon environments have been carried out to develop and screen the friction and wear resistant materials used for sliding components of the sodium cooled reactor. As results of these test, we selected out several materials for candidated alloys. The present study was carried out about combination of Stellite No.6/Self, Colmonoy No.5/Self, Inconel 718/Self and Stellite No.6/SUS304 and long term sliding test (150 hrs.). The results obtained were compared with those of short term sliding test (15 min.) of preceding studies. The results obtained are as follows, (1)Kinetic friction coefficients () of Stellite No.6/Self and Colmonoy No.5/Self were in approximate agreement with short term test of proceding studies (: 0.20.4) (2) of Inconel 718/self showed a stable behavior with the sliding time although it raised at the begining of the test. (3) of Stellite No.6/SUS 304 indicated a variable behavior at the begining of the test, but after 40 hours sliding, it showed a stable behavior with the lapse of time and was about 0.60.7. (4)The Wear depth of Stellite No.6/Self and Colmonoy No.5/Self did not shift for the sliding time. (5)wear depth of Inconel 718 was 2 to 3 times greater than that of Stellite No.6 and Colmonoy No.5. (6)Stellite No.6/SUS304 combination showed the greatest wear depth of all material combinations tested.