| 摘要 |
<p>An oil composition for the treatment of gears which comprises as a base oil a mineral oil having a dynamic viscosity at 100°C of 5 to 40 mm2/sec and incorporated therein (a) 0.01 to 5 wt.% phosphoric ester compound based on the whole composition. It optionally further contains, based on the whole composition, (b) 0.5 to 10 wt.% alkenylsuccinimide compound, alkylsuccinimide compound, or boron adduct of either and (c) 0.5 to 10 wt.% at least one member selected among the salicylates, phenates, and sulfonates of alkaline earth metals. The oil composition is used in a gear hardening step, in which the composition forms a surface coating film simultaneously with gear hardening. Thus, it can impart pitching resistance to the gear.</p> |
