Method for producing cast molded parts as well as cast molded parts produced according to the method

Abstract

The invention relates to a method for the production of castings made of a copper alloy comprising silicon, nickel, chromium, and zirconium, and also inter-metal primary phases, wherein an ingot is drawn by means of hot forming in only one direction at a ratio of at least 4:1, wherein a casting surface of a casting produced from the drawn ingot, said surface coming into contact with a metal melt, is substantially selected perpendicular to the drawing direction of the ingot. A casting produced in this manner is characterized by high wear resistance and increased service life, particularly when used as a block of a side bank of a double strip casting system.

1 - 16 . (canceled) 
     
     
         17 . A method for producing a cast molded part from a copper alloy containing at least one alloy element selected from the group consisting of nickel and cobalt and at least one alloy element selected from the group consisting of chromium, zirconium, beryllium and silicon, and having intermetallic primary phases, comprising: providing a cast ingot which is ironed by hot deformation in only one direction, at a ratio of at least 4:1, the cast ingot having a casting surface which is essentially perpendicular to the ironing direction of the cast ingot, and bringing the copper alloy, in a molten state, into contact with the casting surface of the ironed cast ingot so as to produce a cast molded part from the copper alloy. 
     
     
         18 . The method as recited in  claim 17 , wherein a quantitative proportion of the intermetallic primary phases, cut in a micrograph, between the casting surface and sides of the ironed casting ingot standing at an angle essentially perpendicular to the casting surface is set to be greater than 1.5:1. 
     
     
         19 . The method as recited in  claim 17 , wherein the cast ingot is ironed by hot rolling in only one direction, at a ratio of at least 7:1. 
     
     
         20 . The method as recited in  claim 18 , wherein the cast ingot is ironed by hot rolling in only one direction, at a ratio of at least 7:1. 
     
     
         21 . The method as recited in  claim 17 , wherein the cast ingot is ironed by hot forging. 
     
     
         22 . The method as recited in  claim 17 , wherein the cast ingot is ironed by hot rolling. 
     
     
         23 . A cast molded part produced according to the method as recited in  claim 17 . 
     
     
         24 . The cast molded part as recited in  claim 23 , wherein a quantitative proportion of the intermetallic primary phases, cut in a micrograph, between the casting surface and sides of the ironed casting ingot standing at an angle essentially perpendicular to the casting surface is set to be greater than 1.5:1. 
     
     
         25 . The cast molded part as recited in  claim 23 , wherein the intermetallic primary phases are arranged in bands, and a ratio between an average length of a band lying in a plane of the casting surface and an average length of a band that runs at an angle essentially perpendicular to the casting surface is less than 3:10. 
     
     
         26 . The cast molded part as recited in  claim 23 , wherein the copper alloy when cured has a tensile strength of at least 600 MPa at 20° C., and a tensile strength of at least 350 MPa at 500° C. 
     
     
         27 . The cast molded part as recited in  claim 23 , wherein the copper alloy when cured has an 0.2% yield strength of at least 470 MPa at 20° C. 
     
     
         28 . The cast molded part as recited in  claim 23 , wherein the copper alloy when cured has an A 5  breaking elongation of at least 15% at 20° C. 
     
     
         29 . The cast molded part as recited in  claim 23 , wherein the copper alloy has a hardness of at least 190 HV10 at 20° C. 
     
     
         30 . The cast molded part as recited in  claim 23 , wherein the copper alloy has an electric conductivity of at least 40% IACS at 20° C. 
     
     
         31 . The cast molded part as recited in  claim 23 , wherein the copper alloy has an electric conductivity of at least 45% IACS at 20° C. 
     
     
         32 . The cast molded part as recited in  claim 23 , wherein the cured copper alloy has a grain size of maximally 130 μm measured according to ASTM E 112. 
     
     
         33 . A block for side dams of a twin-belt casting system produced according to the method as recited in  claim 17 .