Lubricants for use in processing of metallic material and methods for processing the metallic material using the lubricants

Abstract

A nonchlorine lubricant for use in processing of a metallic material includes a lubricant base. The lubricant base includes at least one member selected from the group consisting of the vegetable oils and the neopentylated polyol esters. The lubricant may further include an additive added to the lubricant base. The additive comprises a sulfuric extreme pressure agent, an organozinc compound and a calcium ingredient. Preferably, the additive is added to the lubricant base such that sulfur content, zinc content and calcium content in the lubricant are respectively 5.0-50 wt %, 0.2-10 wt % and 0.01-10 wt % of total weight of the lubricant.

1 - 8 . (canceled) 
   
   
       9 . A nonchlorine lubricant for use in processing of a metallic material, comprising:
 a lubricant base, and   an additive added to the lubricant base,   wherein the lubricant base comprises at least one member selected from the group consisting of vegetable oils and neopentylated polyol esters,   wherein content of the vegetable oils and/or the neopentylated polyol esters in the lubricant is 40-80 wt % of total weight of the lubricant,   wherein the additive comprises a sulfuric extreme pressure agent, an organozinc compound and a calcium ingredient,   wherein the additive is added to the lubricant base such that sulfur content, zinc content and calcium content in the lubricant are respectively 5.0-50 wt %, 0.2-10 wt % and 0.01-10 wt % of total weight of the lubricant, and   wherein the calcium ingredient comprises highly-basic calcium sulfonates having base value of 300 mgKOH/g or more.   
   
   
       10 . The nonchlorine lubricant as defined in  claim 9 , wherein the processing of a metallic material comprises shearing of the metallic material. 
   
   
       11 . The nonchlorine lubricant as defined in  claim 9 , wherein the organozinc compound comprises at least one member selected from the group consisting of zinc dialkyldithiophosphate and zinc dialkyldithiocarbamic acid. 
   
   
       12 . A method for processing a metallic material using a processing tool, comprising the steps of:
 feeding a nonchlorine lubricant between the metallic material and the processing tool,   wherein the lubricant comprises a lubricant base and an additive added to the lubricant base,   wherein the lubricant base comprises at least one member selected from the group consisting of vegetable oils and neopentylated polyol esters,   wherein content of the vegetable oils and/or the neopentylated polyol esters in the lubricant is 40-80 wt % of total weight of the lubricant,   wherein the additive comprises a sulfuric extreme pressure agent, an organozinc compound and a calcium ingredient,   wherein the additive is added to the lubricant base such that sulfur content, zinc content and calcium content in the lubricant are respectively 5.0-50 wt %, 0.2-10 wt % and 0.01-10 wt % of total weight of the lubricant, and   wherein the calcium ingredient comprises highly-basic calcium sulfonates having base value of 300 mgKOH/g or more.   
   
   
       13 . The method as defined in  claim 12 , wherein the processing of a metallic material comprises shearing of the metallic material. 
   
   
       14 . The method as defined in  claim 12 , wherein the organozinc compound comprises at least one member selected from the group consisting of zinc dialkyldithiophosphate and zinc dialkyldithiocarbamic acid.