Permanent chill mold for the continuous casting of metals

Abstract

A permanent chill mold for the continuous casting of metals. At least one partial region of the outer surface of the permanent chill mold ( 1 ) is provided with cooling channels ( 2, 2 a, 2 b, 2 c ). The depth and/or the width of the cooling channels ( 2, 2 a, 2 b, 2 c ) are greatest in the middle of a sidewall of the permanent chill mold ( 1 ), and they decrease in the direction of the corner region ( 4 ) of the sidewall. Because of this, a uniform heat dissipation can be implemented, and thereby higher casting speeds are possible.

1 . A permanent chill mold for the continuous casting of metals, the permanent chill mold having an outer surface ( 3 ) which is provided with cooling channels ( 2 ,  2   c ) in at least one partial region thereof, wherein at least one of the depth and the width of the cooling channels ( 2 ,  2   a ,  2   b ,  2   c ) are greatest in the middle of a sidewall of the permanent chill mold ( 1 ), and they decrease in the direction of the corner regions of the sidewall.  
   
   
       2 . The permanent chill mold as recited in  claim 1  wherein at a clearance of 10 mm to 15 mm from the radius of the corner regions ( 4 ), no cooling channels ( 2 ,  2   a ,  2   b ,  2   c ) are situated in the sidewall.  
   
   
       3 . The permanent chill mold as recited in  claim 1  wherein the average channel clearance of two cooling channels ( 2 ,  2   a ,  2   b ,  2   c ) is in a range of 10 mm to 25 mm.  
   
   
       4 . The permanent chill mold as recited in  claim 2  wherein the average channel clearance of two cooling channels ( 2 ,  2   a ,  2   b ,  2   c ) is in a range of 10 mm to 25 mm.  
   
   
       5 . The permanent chill mold as recited in  claim 1  wherein the ratio of the channel average clearance to the width of a cooling channel ( 2 ,  2   a ,  2   b ,  2   c ) is in a range of 1.2 through 3.  
   
   
       6 . The permanent chill mold as recited in  claim 2  wherein the ratio of the channel average clearance to the width of a cooling channel ( 2 ,  2   a ,  2   b ,  2   c ) is in a range of 1.2 through 3.  
   
   
       7 . The permanent chill mold as recited in  claim 3  wherein the ratio of the channel average clearance to the width of a cooling channel ( 2 ,  2   a ,  2   b ,  2   c ) is in a range of 1.2 through 3.  
   
   
       8 . The permanent chill mold as recited in  claim 1  wherein the ratio of the width to the depth of a cooling channel ( 2 ,  2   a ,  2   b ,  2   c ) is in a range of 1 through 4.  
   
   
       9 . The permanent chill mold as recited in  claim 2  wherein the ratio of the width to the depth of a cooling channel ( 2 ,  2   a ,  2   b ,  2   c ) is in a range of 1 through 4.  
   
   
       10 . The permanent chill mold as recited in  claim 3  wherein the ratio of the width to the depth of a cooling channel ( 2 ,  2   a ,  2   b ,  2   c ) is in a range of 1 through 4.  
   
   
       11 . The permanent chill mold as recited in  claim 1  wherein the cooling channels ( 2 ,  2   a ,  2   b ,  2   c ) have a width in a range of 5 mm through 20 mm.  
   
   
       12 . The permanent chill mold as recited in  claim 2  wherein the cooling channels ( 2 ,  2   a ,  2   b ,  2   c ) have a width in a range of 5 mm through 20 mm.  
   
   
       13 . The permanent chill mold as recited in  claim 1  wherein the cooling channels ( 2 ,  2   a ,  2   b ,  2   c ) are situated in a region which begins 50 mm above the casting bath level setpoint position and extends to 300 mm below the casting bath level setpoint position.  
   
   
       14 . The permanent chill mold as recited in  claim 2  wherein the cooling channels ( 2 ,  2   a ,  2   b ,  2   c ) are situated in a region which begins 50 mm above the casting bath level setpoint position and extends to 300 mm below the casting bath level setpoint position.  
   
   
       15 . The permanent chill mold as recited in  claim 1  wherein the cooling channels ( 2 ,  2   a ,  2   b ,  2   c ) have a depth of 3 mm to 8 mm at a residual wall thickness, in the region of the cooling channels ( 2 ,  2   a ,  2   b ,  2   c ), of not less than 6 mm.  
   
   
       16 . The permanent chill mold as recited in  claim 2  wherein the cooling channels ( 2 ,  2   a ,  2   b ,  2   c ) have a depth of 3 mm to 8 mm at a residual wall thickness, in the region of the cooling channels ( 2 ,  2   a ,  2   b ,  2   c ), of not less than 6 mm.  
   
   
       17 . The permanent chill mold as recited in  claim 1  wherein four to ten cooling channels ( 2 ,  2   a ,  2   b ,  2   c ) are situated per 100 mm of chill mold side surface.  
   
   
       18 . The permanent chill mold as recited in  claim 1  wherein the cooling channels ( 2 ,  2   a ,  2   b ,  2   c ) are provided with a transition radius to the channel wall at the channel base.  
   
   
       19 . The permanent chill mold as recited in  claim 1  wherein the cooling channels ( 2 ,  2   a ,  2   b ,  2   c ) have a radius ( 5 ) in their run-in and their run-out regions