Compacting Auxiliary Agent for Powder Metallurgy

Abstract

The present invention concerns a compacting auxiliary for powder metallurgy and a sinterable mixture which contains the compacting auxiliary.

1 . Compacting auxiliary for powder metallurgy, comprising at least one amide of a carboxylic acid with 18 to 22 C atoms and montan wax. 
     
     
         2 . Compacting auxiliary according to  claim 1 , further comprising at least one amide wax. 
     
     
         3 . Compacting auxiliary according to  claim 1 , wherein the amide of a carboxylic acid is a primary, secondary and/or tertiary amide. 
     
     
         4 . Compacting auxiliary according to  claim 1 , wherein the amide of a carboxylic acid is an amide of erucic acid. 
     
     
         5 . Compacting auxiliary according to  claim 2 , wherein the amide wax comprises a primary, secondary and/or tertiary amide. 
     
     
         6 . Compacting auxiliary according to  claim 1 , wherein the amount of the amide of a carboxylic acid is more than 5 wt % and less than 15 wt % based on the total weight of the compacting auxiliary. 
     
     
         7 . Compacting auxiliary according to  claim 1 , wherein the amount of montan wax is 20 wt % to 95 based on the total weight of the compacting auxiliary. 
     
     
         8 . Compacting auxiliary according to  claim 2 , wherein the amount of amide wax is 75 wt % or less based on the total weight of the compacting auxiliary. 
     
     
         9 . Mixture for the production of sintered moulded parts, comprising at least one powdery metal and/or a powdery metal alloy and a compacting auxiliary according to  claim 1 . 
     
     
         10 . Mixture according to  claim 9 , wherein the mixture contains 0.1 wt % to 2.0 wt % of compacting auxiliary based on the total weight of the mixture. 
     
     
         11 . Method for producing a mixture according to  claim 9 , wherein the compacting auxiliary is added to the powdery metal and/or the powdery metal alloy in elemental form or by spraying. 
     
     
         12 . Compacting auxiliary according to  claim 1 , wherein the amount of the amide of a carboxylic acid is from 7.5 wt % to 13 wt % based on the total weight of the compacting auxiliary. 
     
     
         13 . Compacting auxiliary according to  claim 1 , wherein the amount of the amide of a carboxylic acid is10 wt % based on the total weight of the compacting auxiliary 
     
     
         14 . Compacting auxiliary according to  claim 1 , wherein the amount of montan wax is 22.5 wt % to 87 wt % based on the total weight of the compacting auxiliary. 
     
     
         15 . Compacting auxiliary according to  claim 1 , wherein the amount of montan wax is 25 wt % to 60 wt % based on the total weight of the compacting auxiliary. 
     
     
         16 . Compacting auxiliary according to  claim 2 , wherein the amount of amide wax is 20 wt % to 70 wt % based on the total weight of the compacting auxiliary. 
     
     
         17 . Compacting auxiliary according to  claim 2 , wherein the amount of amide wax is 40 wt % to 65 wt % based on the total weight of the compacting auxiliary.