Water-dispersion lubricant of graphite, particulate resin and high molecular weight polybasic acid salt
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United States of America Patent
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Jul 9, 1991
Grant Date -
N/A
app pub date -
Aug 30, 1989
filing date -
Aug 30, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Disclosed herein is a water-dispersion-type hot-rolling lubricant for the production of seamless steel pipes. This lubricant features the inclusion of a salt of a polybasic high molecular acid in addition to fine graphite powder, a water-insoluble fine particulate synthetic resin and water as principal components and fine gilsonite powder as an optional component. Even when the surface temperature of a mandrel bar is in a high temperature range of 100.degree.-400.degree. C., this lubricant can form a uniform and thick coating film on the surface of the bar so that the lubricant can exhibit extremely good hot-rolling lubrication performance.
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