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Accession Number:
AD0265483
Title:
EFFECT OF INERT, REDUCING, AND OXIDIZING ATMOSPHERES ON FRICTION AND WEAR OF METALS TO 1000 DEGREES F
Corporate Author:
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON D C
Report Date:
1961-10-01
Abstract:
Friction and wear characteristics were studied for various bearing metals in inert, reducing, and oxygen controlled atmospheres at temperatures to 1000 F. A hemispherically tipped rider 316-in. rad. under a 1000-g load slid on a rotating disk at a surface speed of 35 fpm. The absence of oxides on metal surfaces resulted in excessive wear and high friction of metals. In some instances where surfaces were devoid of oxides electrolytically pure Cu, mass welding of the specimens occurred. The presence of extremely small quantities of O in the atmosphere for some metals 0.03 vol- O2 for 440-C stainless steel was found to be sufficient to provide adequate surface protection of the metal by oxide. Author
Pages:
0001
File Size:
0.00MB
