| 摘要 |
PROBLEM TO BE SOLVED: To provide lubricating oil for plastic working such as press working and cold forging, excelling in lubricity and usable even under severe lubricating conditions.SOLUTION: A lubricating oil composition for plastic working contains, as an (A) component, 5-99 mass% zinc dithiophosphate having a ≥5C alkyl group or the like; as a (B) component, 1-95 mass% one or more kinds selected from (b1) a bivalent or trivalent metal salt of a ≥6C carboxylic acid, (b2) a bivalent or trivalent metal salt of a sulfonic acid with the base number of ≥500 mgKOH/g, (b3) a specific polyarylene sulfide, and (b4) a sulfur compound such as an ≥8C mercaptan compound; and as a (C) component, 0-80 mass% base oil. |
