| 摘要 |
PROBLEM TO BE SOLVED: To provide a lubricating oil compsn. having excellent plastic forming properties, especially anti-scorching in pipe enlarge work, and excellent in the reduction effect of working force for pipe enlarge work. SOLUTION: This compsn. comprises 10-99.7 mass % 1 or not less than 2 kinds of oils selected from a mineral oil and a synthetic oil as a base oil (A), 0.1-30 mass% 1 or not less than 2 kinds of phosphorus compds. (B), 0.1-30 mass% 1 or not less than 2 kinds of sulfur compds. (C), and 0.1-30 mass% 1 or not less than 2 kinds of metal salts selected from metal stearates or metal oleates (D). |
