Apparatus for producing thin metal strip and method for producing thin metal strip using the same

Abstract

A thin metal strip is produced by a single roll strip casting process, using a cooling roll, a tundish, and a molten metal remover. The cooling roll has an outer peripheral surface, on which it cools and solidifies molten metal while rotating. The tundish can accommodate the molten metal and supplies it onto the outer peripheral surface of the cooling roll. The molten metal remover is disposed downstream of the tundish in the rotating direction of the cooling roll with a gap A between the molten metal remover and an outer peripheral surface of the cooling roll, and removes a surface portion of the molten metal on the outer peripheral surface of the cooling roll to cut down the thickness of the molten metal to the width of the gap A.

1 . An apparatus for producing a thin metal strip by a single roll strip casting process, the apparatus comprising:
 a cooling roll including an outer peripheral surface and configured to cool and solidify molten metal on the outer peripheral surface while rotating;   a tundish capable of accommodating the molten metal and configured to supply the molten metal onto the outer peripheral surface; and   a molten metal remover disposed downstream of the tundish in a rotating direction of the cooling roll with a gap between the molten metal remover and the outer peripheral surface, and configured to remove a portion of a thickness of the molten metal on the outer peripheral surface that is larger than a width of the gap to cut down the thickness of the molten metal to the width of the gap.   
     
     
         2 . The apparatus for producing a thin metal strip according to  claim 1 , wherein the width of the gap is smaller than a thickness of the molten metal on the outer peripheral surface on an upstream side of the molten metal remover in the rotating direction. 
     
     
         3 . The apparatus for producing a thin metal strip according to  claim 1 , wherein
 the tundish is disposed in a vicinity of the outer peripheral surface and includes a supply end configured to guide the molten metal onto the outer peripheral surface, and   the molten metal remover is disposed above the supply end.   
     
     
         4 - 5 . (canceled) 
     
     
         6 . The apparatus for producing a thin metal strip according to  claim 2 , wherein
 the tundish is disposed in a vicinity of the outer peripheral surface and includes a supply end configured to guide the molten metal onto the outer peripheral surface, and   the molten metal remover is disposed above the supply end.   
     
     
         7 . The apparatus for producing a thin metal strip according to  claim 1 , wherein the molten metal remover is disposed opposite to the outer peripheral surface and includes a heat dissipation surface to be in contact with the molten metal passing through the gap. 
     
     
         8 . The apparatus for producing a thin metal strip according to  claim 2 , wherein the molten metal remover is disposed opposite to the outer peripheral surface and includes a heat dissipation surface to be in contact with the molten metal passing through the gap. 
     
     
         9 . The apparatus for producing a thin metal strip according to  claim 3 , wherein the molten metal remover is disposed opposite to the outer peripheral surface and includes a heat dissipation surface to be in contact with the molten metal passing through the gap. 
     
     
         10 . The apparatus for producing a thin metal strip according to  claim 6 , wherein the molten metal remover is disposed opposite to the outer peripheral surface and includes a heat dissipation surface to be in contact with the molten metal passing through the gap. 
     
     
         11 . A method for producing a thin metal strip by a single roll strip casting process using the apparatus for producing a thin metal strip according to  claim 1 , the method comprising:
 a step of supplying the molten metal in the tundish onto the outer peripheral surface of the cooling roll;   a step of rapidly cooling the molten metal on the outer peripheral surface with the cooling roll to form the thin metal strip; and   a step of removing, with the molten metal remover, a portion of a thickness of the molten metal on the outer peripheral surface that is larger than the width of the gap to cut down the thickness of the molten metal on the outer peripheral surface to the width of the gap.   
     
     
         12 . A method for producing a thin metal strip by a single roll strip casting process using the apparatus for producing a thin metal strip according to  claim 2 , the method comprising:
 a step of supplying the molten metal in the tundish onto the outer peripheral surface of the cooling roll;   a step of rapidly cooling the molten metal on the outer peripheral surface with the cooling roll to form the thin metal strip; and   a step of removing, with the molten metal remover, a portion of a thickness of the molten metal on the outer peripheral surface that is larger than the width of the gap to cut down the thickness of the molten metal on the outer peripheral surface to the width of the gap.   
     
     
         13 . A method for producing a thin metal strip by a single roll strip casting process using the apparatus for producing a thin metal strip according to  claim 3 , the method comprising:
 a step of supplying the molten metal in the tundish onto the outer peripheral surface of the cooling roll;   a step of rapidly cooling the molten metal on the outer peripheral surface with the cooling roll to form the thin metal strip; and   a step of removing, with the molten metal remover, a portion of a thickness of the molten metal on the outer peripheral surface that is larger than the width of the gap to cut down the thickness of the molten metal on the outer peripheral surface to the width of the gap.   
     
     
         14 . A method for producing a thin metal strip by a single roll strip casting process using the apparatus for producing a thin metal strip according to  claim 6 , the method comprising:
 a step of supplying the molten metal in the tundish onto the outer peripheral surface of the cooling roll;   a step of rapidly cooling the molten metal on the outer peripheral surface with the cooling roll to form the thin metal strip; and   a step of removing, with the molten metal remover, a portion of a thickness of the molten metal on the outer peripheral surface that is larger than the width of the gap to cut down the thickness of the molten metal on the outer peripheral surface to the width of the gap.   
     
     
         15 . A method for producing a thin metal strip by a single roll strip casting process using the apparatus for producing a thin metal strip according to  claim 7 , the method comprising:
 a step of supplying the molten metal in the tundish onto the outer peripheral surface of the cooling roll;   a step of rapidly cooling the molten metal on the outer peripheral surface with the cooling roll to form the thin metal strip; and   a step of removing, with the molten metal remover, a portion of a thickness of the molten metal on the outer peripheral surface that is larger than the width of the gap to cut down the thickness of the molten metal on the outer peripheral surface to the width of the gap.   
     
     
         16 . A method for producing a thin metal strip by a single roll strip casting process using the apparatus for producing a thin metal strip according to  claim 8 , the method comprising:
 a step of supplying the molten metal in the tundish onto the outer peripheral surface of the cooling roll;   a step of rapidly cooling the molten metal on the outer peripheral surface with the cooling roll to form the thin metal strip; and   a step of removing, with the molten metal remover, a portion of a thickness of the molten metal on the outer peripheral surface that is larger than the width of the gap to cut down the thickness of the molten metal on the outer peripheral surface to the width of the gap.   
     
     
         17 . A method for producing a thin metal strip by a single roll strip casting process using the apparatus for producing a thin metal strip according to  claim 9 , the method comprising:
 a step of supplying the molten metal in the tundish onto the outer peripheral surface of the cooling roll;   a step of rapidly cooling the molten metal on the outer peripheral surface with the cooling roll to form the thin metal strip; and   a step of removing, with the molten metal remover, a portion of a thickness of the molten metal on the outer peripheral surface that is larger than the width of the gap to cut down the thickness of the molten metal on the outer peripheral surface to the width of the gap.   
     
     
         18 . A method for producing a thin metal strip by a single roll strip casting process using the apparatus for producing a thin metal strip according to  claim 10 , the method comprising:
 a step of supplying the molten metal in the tundish onto the outer peripheral surface of the cooling roll;   a step of rapidly cooling the molten metal on the outer peripheral surface with the cooling roll to form the thin metal strip; and   a step of removing, with the molten metal remover, a portion of a thickness of the molten metal on the outer peripheral surface that is larger than the width of the gap to cut down the thickness of the molten metal on the outer peripheral surface to the width of the gap.   
     
     
         19 . A method for producing a thin metal strip according to  claim 18 ,
 wherein, the thin metal strip contains a chemical composition, which contains Cu and Sn, and   contains a phase which is D0 3  in Strukturbericht notation.   
     
     
         20 . A method for producing a thin metal strip according to  claim 19 ,
 the chemical composition   contains 10 to 20 at % or 21 to 27 at % of Sn, with the balance being Cu and impurities.   
     
     
         21 . A method for producing a thin metal strip according to  claim 20 ,
 the chemical composition contains, in place of a part of Cu, one or more selected from the group consisting of Ti, V, Cr, Mn, Fe, Co, Ni, Zn, Al, Si, B, and C.