Lubricant for use in press working of a metal material and a press working method of a metal material using the same

Abstract

A non-chlorine type lubricant in which a sulfur type extreme pressure additive, an organic zinc compound, a calcium type additive, and an ester compound are blended with a base oil for the lubricant, and having a kinetic viscosity from 5 to 50 mm 2 /s at 40° C.

1 . A lubricant for use in press working of a metal material having a non-chlorine type composition including
 a sulfur type extremely pressure additive, an organic zinc compound, a calcium type additive, and an ester compound are blended with a lubricant base oil, and have a kinetic viscosity from 5 to 50 mm 2 /s at 40° C.   
     
     
         2 . A lubricant according to  claim 1 , wherein
 the sulfur content is from 0.5 to 10% by weight based on the entire amount of the lubricant,   the zinc content is from 0.05 to 1.0% by weight based on the entire amount of the lubricant,   the calcium content is from 0.1 to 2.0% by weight based on the entire amount of the lubricant, and   the ester content is from 0.1 to 2.0% by weight based on the entire amount of the lubricant.   
     
     
         3 . A lubricant according to  claim 2 , wherein the sulfur type extreme pressure additive is one or more members selected from the group consisting of sulfurized oils and fats, sulfurized fatty acids, sulfurized esters, sulfurized olefins, polysulfides, thiocarbamates, and sulfurized mineral oils. 
     
     
         4 . A lubricant according to  claim 2 , wherein the organic zinc compound is at least one of a zinc dialkyl dithiophosphate and/or a zinc dialkyl dithiocarbamate. 
     
     
         5 . A lubricant according to  claim 2 , wherein the calcium type additive-is one or more members selected from the group consisting of calcium sulfonate, calcium salicylate, and calcium phenate. 
     
     
         6 . A lubricant according to  claim 2 , wherein the calcium type additive-is a basic calcium sulfonate with a total base amount of 300 mgKOH/g or more. 
     
     
         7 . A lubricant according to  claim 2 , wherein the ester compound is at least one of a polyol ester and/or a complex ester. 
     
     
         8 . A lubricant according to  claim 2 , wherein the metal material is an anti-rust steel sheet. 
     
     
         9 . A lubricant according to  claim 8 , wherein the anti-rust steel sheet is an electrolytic zinc plated metal sheet. 
     
     
         10 . A lubricant according to  claim 2  for working a metal material to be cleaned with an alkali ion water after the working. 
     
     
         11 . A lubricant according to  claim 2  for working a metal material which is cleaned after the working and then applied with a coating treatment. 
     
     
         12 . A method of press working a metal material including a step of conducting working between a metal material and a tool including a lubricant which is of a non-chlorine composition comprising a sulfur type extreme pressure additive, an organic zinc compound, a calcium type additive, and an ester compound blended with a base oil and having
 a kinetic viscosity from 5 to 50 mm 2 /s at 40° C.   
     
     
         13 . A method of press working a metal material according to  claim 12 , wherein
 the sulfur content is from 0.5 to 10% by weight based on the entire amount of the lubricant,   the zinc content is from 0.05 to 1.0% by weight based on the entire amount of the lubricant,   the calcium content is from 0.1 to 2.0% by weight based on the entire amount of the lubricant, and   the ester content is from 0.1 to 2.0% by weight based on the entire amount of the lubricant.   
     
     
         14 . A method of press working a metal material according to  claim 13 , wherein the metal material is an anti-rust steel sheet,
 a cleaning step of cleaning the anti-rust steel sheet subjected to press working with an alkali ion water and   a coating step of coating a coating material to the surface of the anti-rust steel sheet that has been cleaned in the cleaning step.   
     
     
         15 . A method of press working a metal material according to  claim 14 , wherein the alkali ion water to be used in the cleaning step is heated to a temperature of 60 to 80° C.