Clad sheets for corrosion resistance and fabricating method thereof

Abstract

Disclosed are a structure of multi-layered clad plates and sheets for corrosion resistance and a fabricating method thereof. Provided are clad plates and sheets for corrosion resistance in which Ni, Co, Ti, Ni, V, and Zr having an excellent corrosion resistance, or an alloy thereof are bonded to cheap Fe, Cu, or an alloy thereof. Chemical compositions of the clad metals and structures of the clad plates and sheets are easily modified with service conditions of the clad plates and sheets. Also, this invention provides a more cost-effective method based on a. resistance seam welding process for fabricating the corrosion-resistant clad plates and sheets.

1 - 6 . (canceled)  
     
     
         7 . Clad plates and sheets for corrosion resistance comprising: 
 a substrate of a plate shape selected from the group consisting of Cu, Fe, and Ni,    a clad metal of a plate shape stacked at one side of the substrate and selected from the group consisting of Ti, V, Nb, and Zr,    an insert metal layer inserted between the substrate and the clad metal for bringing about an eutectic reaction with the clad metal wherein the insert metal layer is at least one layer; and wherein material constituting the insert metal layer is at least one selected from the group consisting of Cu, Fe, Ni and Co and each metal is a pure metal or an alloy, and    wherein in case that the clad metal and the substrate are Ti and Cu, respectively, the clad plates and sheets are constructed as one selected from the group consisting of in the order of clad metal/insert metal layer/substrate of Ti/Ni/Cu, Ti/Cu/Ni/Cu, Ti/Cu/X/Cu, and Ti/Ni/X/Cu, and the X corresponding to a second layer of the insert metal layer is a pure metal or an alloy whose melting point is higher than an eutectic temperature of a system of the Ti clad metal and the first insert metal layer (Cu or Ni) and has a structure of at least one layer.    
     
     
         8 . (canceled)  
     
     
         9 . Clad plates and sheets for corrosion resistance comprising: 
 a substrate of a plate shape selected from the group consisting of Cu, Fe, and Ni;    a clad metal of a plate shape stacked at one side of the base metal and selected from the group consisting of Ti, V, Nb, and Zr,    an insert metal layer inserted between the substrate and the clad metal for bringing about an eutectic reaction with the clad metal wherein the insert metal layer is at least one layer; and wherein material constituting the insert metal layer is at least one selected from the group consisting of Cu, Fe, Ni and Co and each metal is a pure metal or an alloy; and    wherein in case that the clad metal and the substrate are Ti and Ni, respectively, the clad plates and sheets are constructed as one selected from the group consisting of Ti/Cu/Ni, Ti/Ni/Cu/Ni, Ti/Cu/X/Ni, and Ti/Ni/X/Ni, and the X corresponding to the second layer of the insert metal layer is a pure metal or an alloy whose melting point is higher than an eutectic temperature of a system of the Ti clad metal and the first insert metal layer (Cu or Ni) and has a structure of at least one layer.    
     
     
         10 . Clad plates and sheets for corrosion resistance comprising: 
 a substrate of a plate shape selected from the group consisting of Cu, Fe, and Ni    a clad metal of a plate shape stacked at one side of the base metal and selected from the group consisting of Ti, V, Nb, and Zr;    an insert metal layer inserted between the substrate and the clad metal for bringing about an eutectic reaction with the clad metal wherein the insert metal layer is at least one layer, and wherein material constituting the insert metal layer is at least one selected from the group consisting of Cu, Fe, Ni and Co and each metal is a pure metal or an alloy; and    wherein in case that the clad metal and the substrate are Zr and Cu, respectively, the clad plates and sheets are constructed as one selected from the group consisting of in the order of clad metal/insert metal layer/substrate of Zr/Co/Cu, Zr/Ni/Cu, Zr/Cu/Ni/Cu, Zr/Cu/Co/Cu, Zr/Co/Fe/Cu, Zr/Fe/Co/Cu, Zr/Co/Ni/Cu, Zr/Ni/Co/Cu, Zr/Cu/X/Cu, Zr/Co/X/Cu, and Zr/Fe/X/Cu, and the X corresponding to a second layer of the insert metal layer is a pure metal or an alloy whose melting point is higher than an eutectic temperature of a system of the Zr clad metal and the first insert metal layer (Co or Cu or Ni or Fe) and has a structure of at least one layer.    
     
     
         11 . Clad plates and sheets for corrosion resistance comprising: 
 a substrate of a plate shape selected from the group consisting of Cu, Fe, and Ni,    a clad metal of a plate shape stacked at one side of the base metal and selected from the group consisting of Ti, V, Nb, and Zr;    an insert metal layer inserted between the substrate and the clad metal for bringing about an eutectic reaction with the clad metal wherein the insert metal layer is at least one layer; and wherein material constituting the insert metal layer is at least one selected from the group consisting of Cu, Fe, Ni and Co and each metal is a pure metal or an alloy; and    wherein in case that the clad metal and the substrate are Zr and Ni, respectively, the clad plates and sheets are constructed as one selected from the group consisting of in the order of clad metal/insert metal layer/substrate of Zr/Cu/Ni, Zr/Co/Ni, Zr/Ni/Cu/Ni, Zr/Co/Cu/Ni, Zr/Cu/Co/Ni, Zr/Co/Fe/Ni, Zr/Fe/Co/Ni, Zr/Ni/Co/Ni, Zr/Co/X/Ni, and Zr/Fe/X/Ni, and the X corresponding to a second layer of the insert metal layer is a pure metal or an alloy whose melting point is higher than an eutectic temperature of a system of the Zr clad metal and the first insert metal layer (Cu or Co or Ni or Fe) and has a structure of at least one layer.    
     
     
         12 - 14 . (canceled)  
     
     
         15 . A method for fabricating clad plates and sheets for corrosion resistance, wherein one substrate of a plate shape selected from Cu, Fe, or Ni and one clad metal of a plate shape selected from Ti, V, Nb, or Zr are inserted between two electrodes, and an electric current and a pressure are simultaneously applied to the electrodes to form an eutectic reaction layer at an interface between the substrate and the clad metal.  
     
     
         16 . A method for fabricating clad plates and sheets for corrosion resistance, wherein one substrate of a plate shape selected from Cu, Fe, or Ni, one clad metal of a plate shape selected from Ti, V, Nb, or Zr, and an insert metal layer located between the substrate and the clad metal are inserted between two electrodes, and an electric current and a pressure are simultaneously applied to the electrodes to form an eutectic reaction layer at an interface between he clad metal and the insert metal layer.  
     
     
         17 . The method of  claim 15 , wherein the applied electric current is in a range of 7000-25000A.  
     
     
         18 . The method of  claim 15 , wherein the applied pressure is in a range of 1˜1500 kg f/m 2 .  
     
     
         19 . The method of  claim 16 , wherein the applied electric current is in a range of 7000-25000A.  
     
     
         20 . The method of  claim 16 , wherein the applied pressure is in a range of 1˜1500 kg f/m 2 .