| 摘要 |
Metal working lubricant compositions are provided in which a dry film of a lubricant is formed on the metal being worked. The lubricant comprises an ester having a melting point of at least 100 DEG F. and a solid surfactant having an HLB number in the range of about 7-12. The surfactant is solid at room temperature and will cause the lubricant to disperse in water at a temperature exceeding the lubricant's melting point. Consequently, the solid surfactant incorporated in the dry film lubricant allows lubricant removal by washing of the metal with just hot water. The invention also provides for metal working methods in which the lubricants are used.
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