Lubricants for use in processing of metallic material and methods for processing the metallic material using the lubricants
AssigneeToyota Boshoku Kabushiki Kaisha
InventorsMami Kato, Teruo Fukaya
Life of this patent
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Abstract
A lubricant for use in processing of a metallic material includes a lubricant base composed of at least one paraffinic hydrocarbon and a modifier oil added to the lubricant base at a rate of 2-20 wt % of total weight of the lubricant. The modifier oil contains (a) a sulfuric extreme pressure agent, (b) a rust inhibitive agent and (c) a calcium ingredient. Content of sulfur is 0.5-20 wt % of total weight of the modifier oil. Content of the rust inhibitive agent is 0.1-15 wt % of total weight of the modifier oil. Further, content of calcium is 0.1-15 wt % of total weight of the modifier oil.
Claims3
A lubricant for use in processing of a high tensile strength steel sheet, comprising:
- a lubricant base composed of at least one paraffinic hydrocarbon 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 mgKOH/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 mm2/s at −20° C., a flash point of 40° C. or more, and an ignition point of 240° C. or more.
2-4. (canceled)
A method for processing a metallic material using a processing tool, comprising the steps of:
- feeding a lubricant between the metallic material and the processing tool, and
- processing the metallic material at a temperature of −5 to −35° C.,
- wherein the lubricant comprises a lubricant base composed of at least one paraffinic hydrocarbon and a modifier oil added to the lubricant base at a rate of 2-20 wt % of total weight of the lubricant, and has freezing point of not more than −40° C., wherein the modifier oil contains (a) a sulfuric extreme pressure agent, (b) a rust inhibitive agent and (c) a calcium ingredient, 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, and wherein content of calcium is 0.1-15 wt % of total weight of the modifier oil.
Dependencies are inferred from the claim text.