METAL WORKING OIL COMPOSITION, METHOD OF METAL WORKING, AND PRODUCT OF METAL WORKING

摘要

An oil composition for use in metal working with minimal quantity lubrication which comprises: a base oil selected from the group consisting of natural fats, derivatives thereof, and synthetic ester oils; a sorbitan fatty acid ester; and a phospholipid. Also provided are: a method of metal working which comprises using the oil composition; and a product of metal working with the oil composition. The oil composition is excellent in lubricity and rust prevention and is suitable for processing a metallic material such as a cast iron, steel, stainless steel, or non-ferrous metal (aluminum alloy or magnesium alloy) by metal working with minimal quantity lubrication.