Low-migration components, media- or drinking-water carrying works

Abstract

The invention relates to a method for producing components, media- or drinking-water carrying works, in particular fittings, valves, pipes, press connectors, roof or drainage gutters, as well as components for media- or drinking-water carrying works, in particular fittings, valves, pipes, press connectors, roof or drainage gutters. The object to provide a method for producing components for media- or drinking-water carrying works, in particular fittings, valves, pipes, press connectors, roof or drainage gutters, whereby corrosion-resistant components can be produced simply and economically, which components exhibit low migration of metal ions into the medium, for example of lead and nickel ions into drinking water, is achieved in that an ingot or a rod is continuously cast from a copper alloy, wherein the copper alloy has the following alloying components in wt. %: 2%≦Si≦4.5%, 1%≦Zn≦17%, 0.05%≦Mn≦0.6%, unavoidable accompanying elements to a maximum of 0.5% in total, preferably to a maximum of 0.3% in total, the remainder copper and the ingot or the rod for producing the component is subjected at least to one cold and/or hot forming process.

1 . A method for producing components, media-or drinking-water carrying works, in particular fittings, valves, pipes, press connectors, roof or drainage gutters, characterised in that an ingot or a rod is continuously cast from a copper alloy, wherein the copper alloy has the following alloying components in wt. %:  
       2%≦Si≦4.5%,  1%≦Zn≦17%,  0.05%≦Mn≦0.6%, 
     unavoidable accompanying elements to a maximum of 0.5% in total, preferably to a maximum of 0.3% in total, the remainder copper and the ingot or the rod for producing the component is subjected at least to one cold and/or hot forming process.  
   
   
       2 . The method according to  claim 1 , wherein the alloying component Zn has the following fraction in wt. %:  
       5%≦Zn≦15%. 
   
   
       3 . The method according to  claim 1 , wherein the alloying component Si has the following fraction in wt. %:  
       2.8%≦Si≦4%. 
   
   
       4 . The method according to  claim 1 , wherein the alloying component Mn has the following fraction in wt. %:  
       0.2%≦Mn≦0.6%. 
   
   
       5 . The method according to  claim 1 , wherein the copper alloy contains no nickel and/or lead.  
   
   
       6 . The method according to  claim 1 , wherein the copper alloy has a copper content of at least 80 wt. %.  
   
   
       7 . The method according to  claim 1 , wherein a thick-walled tube or a solid rod is produced from the ingot or the rod using extrusion.  
   
   
       8 . The method according to  claim 7 , wherein the thick-walled tube is cold drawn.  
   
   
       9 . The method according to  claim 8 , wherein the cold-drawn tube is formed by an internal high-pressure (IHU) method.  
   
   
       10 . The method according to one of claims  8 , wherein the cold-drawn tube or the IHU-formed tube is subjected in at least one further forming step to bending, expanding, reducing, rolling, thickening, flanging and/or further IHU forming steps with or without intermediate annealing between individual forming steps.  
   
   
       11 . The method according to  claim 7 , wherein the thick-walled tube or the solid rod is at least hot-pressed or die forged in a plurality of steps.  
   
   
       12 . The method for producing components, media- or drinking-water carrying works, in particular fittings, valves or pipes according to  claim 1 , wherein after the continuous casting, the ingot is hot- or cold-rolled to produce sheets with or without intermediate annealing and the components are produced from the sheets by further cold and/or hot forming.  
   
   
       13 . The method according to  claim 12 , wherein a longitudinally welded tube is produced from the cold- or hot-rolled sheets.  
   
   
       14 . The method according to any one of claims  12 , wherein the sheets or the longitudinally welded tube is subjected to deep drawing.  
   
   
       15 . Components for media- or drinking-water carrying works, in particular fittings, valves, pipes, press connectors, roof or drainage gutters produced by a method according to  claim 1.