Copper alloy material for continuous casting mold and process for producing same

Abstract

The present invention relates to a copper alloy material for continuous casting mold and a process for producing the same. In more detail, the present invention relates to a copper alloy material for continuous casting mold, which consists of 0.05 wt % to 0.6 wt % of Cr, 0.01 wt % to 0.5 wt % of Ag, 0.005 wt % to 0.10 wt % of P, and a balance of Cu and unavoidable impurities; and a process for producing the same. The copper alloy material can further include less than 0.1 wt % of at least one of elements selected from a group consisting of Sn, Ti, Mg, Mn, Fe, Co, Al, Si, Mo, Zr and W.

1 . A copper alloy material for continuous casting mold consisting of 0.05 wt % to 0.6 wt % of Cr, 0.01 wt % to 0.5 wt % of Ag, 0.005 wt % to 0.10 wt % of P, and a balance of Cu and a trace of unavoidable impurities, and having Brinell hardness of higher than 120 HB, and electric conductivity of higher than 85% IACS. 
     
     
         2 . The copper alloy material as claimed in  claim 1 , further including less than 0.1 wt % of at least one of elements selected from a group consisting of Sn, Ti, Mg, Mn, Fe, Co, Al, Si, Mo, Zr and W. 
     
     
         3 . A process for producing a copper alloy material for continuous casting mold, comprising the steps of:
 casting an ingot consisting of 0.05 wt % to 0.6 wt % of Cr, 0.01 wt % to 0.5 wt % of Ag, 0.005 wt % to 0.10 wt % of P, and a balance of Cu under an air atmosphere;   homogenizing the obtained ingot at 700° C. to 950° C. for 30 minutes to 6 hours;   hot working the homogenized product at 10% to 90%;   cold working the hot worked product at 10% to 80%;   precipitating the cold worked product at 400° C. to 600° C. for 1 hour to 8 hours; and   cold working the precipitated product at 10% to 80% after cooling the product down to a room temperature.   
     
     
         4 . A process for producing a copper alloy material for continuous casting mold, comprising the steps of:
 casting an ingot consisting of 0.05 wt % to 0.6 wt % of Cr, 0.01 wt % to 0.5 wt % of Ag, 0.005 wt % to 0.10 wt % of P, and a balance of Cu under an air atmosphere;   homogenizing the obtained ingot at 700° C. to 950° C. for 30 minutes to 6 hours;   cold working the homogenized product at 10% to 80%;   precipitating the cold worked product at 400° C. to 600° C. for 1 hour to 8 hours; and   cold working the precipitated product at 10% to 80% after cooling the product down to a room temperature.   
     
     
         5 . A process for producing a copper alloy material for continuous casting mold, comprising the steps of:
 casting an ingot consisting of 0.05 wt % to 0.6 wt % of Cr, 0.01 wt % to 0.5 wt % of Ag, 0.005 wt % to 0.10 wt % of P, and a balance of Cu under an air atmosphere;   cold working the obtained ingot at 10% to 80%;   precipitating the cold worked product at 400° C. to 600° C. for 1 hour to 8 hours; and   cold working the precipitated product at 10% to 80% after cooling the product down to a room temperature.   
     
     
         6 . The method as claimed in  claim 3 , wherein the ingot further includes less than 0.1 wt % of at least one of elements selected from a group consisting of Sn, Ti, Mg, Mn, Fe, Co, Al, Si, Mo, Zr and W. 
     
     
         7 . The method as claimed in  claim 4 , wherein the ingot further includes less than 0.1 wt % of at least one of elements selected from a group consisting of Sn, Ti, Mg, Mn, Fe, Co, Al, Si, Mo, Zr and W. 
     
     
         8 . The method as claimed in  claim 5 , wherein the ingot further includes less than 0.1 wt % of at least one of elements selected from a group consisting of Sn, Ti, Mg, Mn, Fe, Co, Al, Si, Mo, Zr and W.