| 摘要 |
A substantially water-free, liquid lubricant for metal forming, which comprises a lubricating oil, and at least one of linearly condensed phosphorus compounds represented by the following general formula (1): MmHn+2-mPnO3n+1 (1) wherein m is an integer of 0, 1, . . . , n+1, n is an integer of 2 to 6, and M is an alkali metal, and cyclically condensed phosphorus compounds represented by the following general formulae (2) and (3): (HPO3)n (2) MxHy(PO3)x+y (3) wherein n is an integer of 2 to 8, M is an alkali metal, and each of x and y is an integer of 1 or more, where x+y</=8, and furthermore at least one of organic compounds having phosphorus, sulfur or chlorine as an extreme-pressure agent, and furthermore a fatty acid can form a lubricating film with a good heat resistance and a good lubricating ability by heat generated during metal forming only by applying it to the surface of a workpiece or a mold and can work effectively for preventing the workpiece from galling, greatly contributing to simplification of the production steps and reduction in product cost.
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