Effect of double vacuum melting and retained austenite on rolling-element fatigue life of AMS 5749 bearing steel
Richard J. Parker, Robert S. Hodder, United States. National Aeronautics and Space Administration. Scientific and Technical Information Office
National Aeronautics and Space Administration, Scientific and Technical Information Office, 1977 - Technology & Engineering - 14 pages
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12 times greater 5749 BEARING STEEL 5749 steel balls air cool AISI M-50 balls AISI M-50 steel AMS 5749 balls AMS 5749 BEARING AMS 5749 steel AUSTENITE ON ROLLING-ELEMENT ball stress cycles balls gave lives balls in five-ball characteristics of AISI combines the tempering confidence number contact angle cool to room detrimental to rolling-element double vacuum melting effects of double five-ball fatigue tester five-ball tests hardness retention characteristics highest level hot hardness level of retained Lewis Research Center lower balls lubricant M-50 steel balls Maximum Hertz stress MELTING AND RETAINED millions of upper naphthenic mineral oil NASA oxidation resistance race temperature retained austenite level room temperature shaft speed significantly detrimental steel balls gave stress of 5520 superrefined naphthenic mineral temperature of 339 three lots upper ball stress upper test ball upper-ball stress cycles vacuum arc remelting vacuum induction melting VIM AMS VIM-VAR AISI M-50 VIM-VAR AMS