Patent ID: 8586514
Filing Date: 2013-11-19
Classification: C10M,C10N

Abstract:
1. A lubricant for use in processing of a high tensile strength steel sheet, consisting of: a lubricant base consisting essentially of hydrocarbons having a carbon number of 8-16 and a boiling point of 210° C. or less, and a modifier oil added to the lubricant base at a rate of 2-20 wt % of total weight of the lubricant, wherein the modifier oil contains (a) a sulfuric extreme pressure agent, (b) a rust inhibitive agent and (c) a calcium ingredient composed of highly-basic calcium sulfonates having base value of 300 mg KOH/g or more, wherein content of sulfur is 0.5-20 wt % of total weight of the modifier oil, wherein content of the rust inhibitive agent is 0.1-15 wt % of total weight of the modifier oil, wherein content of calcium is 0.1-15 wt % of total weight of the modifier oil, and wherein the lubricant has freezing point of not more than −40° C., kinetic viscosity of not greater than 12.5 mm