2006 Volume 72 Issue 713 Pages 203-210
To clarify friction and wear properties of the radical nitriding SCM 415 H spur gears coated with copper (Cu), titanium nitride (TiN) and molybdenum disulfide (MoS2), a gear test was carried out under dry friction and grease lubrication in vacuum of about 1-4 x 10-4 Pa using a power-circulating gear test rig. From the test, the following results were obtained. (1) The wear lives of the gears at dry friction increased in following order : TiN coated gear < MoS2 coated gear < non-coated gear <Cu coated gear. The wear life of Cu coated gear was approximately 2 times as large as that of non-coated gear, and it can be considered that Cu coating is one of the surface treatment to improve the wear life of the gear. (2) The wear lives of the gears when lubricated with grease increased in following order : Cu coated gear <non-coated gear < MoS2 coated gear < TiN coated gear. The wear life of TiN coated gear was approximately 2 times as large as that of non-coated gear. In design of the gear units with a long wear life in a vacuum environment, it is an important thing to employ the surface treatment method of the tooth face in which is suitable for the lubricating condition of the gears.
Transactions of the Society of Mechanical Engineers
Transactions of the Japan Society of Mechanical Engineers
Transactions of the Japan Society of Mechanical Engineers Series A
Transactions of the Japan Society of Mechanical Engineers Series B
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
