Process for the production of metallic components from a copper alloy

Abstract

The present invention relates to a process for producing metallic components, preferably for guiding media in drinking water systems, from a copper alloy, comprising melting an alloy with the constituents, conditioning the material before and/or during the solidification process, preferably by grain refinement, and hot forming the material at a temperature between 680 and 780° C. The present invention is intended to provide a process for manufacturing metallic components, in particular for guiding media in a drinking water system, which can be carried out economically.

1 . Process for the production of metallic components, preferably for guiding media in drinking water systems, from a copper alloy, comprising
 (a) Melting of an alloy with the components
 3.5-4.8 wt. % Sn 
 1.0-2.5% by weight Zn 
 0.02-0.5% by weight S 
 ≤0.10% by weight Pb 
 <0.1% by weight Sb 
 0.05-0.4% by weight Ni 
 0.01-0.06% by weight P
 and unavoidable impurities, including 
 
 <0.01% by weight Al 
 <0.01% by weight Cd 
 <0.02% by weight Cr 
 <0.01% by weight Si
 and the remainder Cu, 
 
   (b) conditioning of the alloy before and/or during the solidification of a semi-finished product formed from the alloy, preferably by grain refinement, and   (c) Hot forming of the semi-finished product at a temperature between 680 and 780° C. to produce the component.   
     
     
         2 . Process for producing metallic components from a copper alloy according to  claim 1 , characterized by a Zr content of between 0.005-0.02% by weight. 
     
     
         3 . Process for producing metallic components from a copper alloy according to  claim 1 , characterized by an Fe content of between 0.005-0.3% by weight and a B content of between 0.005-0.02% by weight. 
     
     
         4 . Process for producing metallic components from a copper alloy according to  claim 1 , characterized in that the Zn content is between 1.0-2.4% by weight. 
     
     
         5 . Process for producing metallic components from a copper alloy according to  claim 1 , characterized in that the Ni content is between 0.1-0.3% by weight. 
     
     
         6 . Process for producing metallic components from a copper alloy according to  claim 1 , characterized in that the hot forming takes place at a temperature of at least 700° C. 
     
     
         7 . Process for producing metallic components from a copper alloy according to  claim 1 , characterized in that the mean grain size of the semi-finished product before hot forming is between 0.5-3 mm. 
     
     
         8 . Process for producing metallic components from a copper alloy according to  claim 1 , characterized in that the hot forming is extrusion. 
     
     
         9 . Process of manufacturing metallic components from a copper alloy according to  claim 1 , characterized by stress-relieving machining after hot forming. 
     
     
         10 . Process for producing metallic components from a copper alloy according to  claim 1 , characterized in that the hot forming is carried out at a deformation rate of between 1 1/s and 1/10 1/s. 
     
     
         11 . The process of  claim 1 , wherein the hot forming takes place at a temperature of at least 710° C. 
     
     
         12 . The process of  claim 1 , wherein the mean grain size of the semi-finished product before hot forming is between 0.5-3 mm; and
 wherein the hot forming takes place at a temperature of at least 700° C.   
     
     
         13 . The process of  claim 12 , further comprising stress-relieving machining after hot forming.