Method for preparing metallic workpieces for cold forming

Method for preparing metallic workpieces for cold forming

  • CN 101,189,366 A
  • Filed: 05/03/2006
  • Published: 05/28/2008
  • Est. Priority Date: 05/19/2005
  • Status: Active Application
First Claim
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1. method that is used to prepare in order to the metal works of cold-forming, this method is carried out in the following way:

  • the metallic surface that contacts this metal works with the aqueous acidic phosphating solution, thereby form one deck phosphate coating at least, pass through then with the surface of at least a lubricant application through the phosphoric acid salt coating, thereby form one deck lubricant layer at least, it is characterized in that, described phosphating solution substantially only contains calcium, magnesium is or/and the manganese conduct is selected from the periodic table of chemical element the 2nd main group and the 1st, 2 and the cationic positively charged ion and the phosphate radical of 5-8 subgroup, the phosphating solution of alkaline including earth metal fluoride and cooperate fluorochemical not wherein, and carry out electrolytic phosphating and handle.

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