Modular extrusion die

Abstract

Extrusion tool or die for the extrusion of metallic material, in particular a material of aluminium or alloys thereof, or other non-ferrous metals such as Cu and alloys thereof. The die is a modular type comprising die plate/s ( 2, 3 ) with cavitie/s ( 4, 5 ) provided with insert/s ( 6, 7 ). The area of the die with strong thermo-mechanical solicitation comprising the die plate/s ( 2, 3 ), is made of a nickel, iron or cobalt-based super alloy, whereas the die in the area with strong tribological solicitation comprising the insert/s, i.e. the mandrel ( 6 ) and/or the bearing ( 7 ) of the die, is manufactured of a wear resistant material which may be a high speed tool steel, a precipitation hardened steel or a high alloy hot-worked steel, or any of suitable steel types provided with a coating such as nano particle or CVD.

1 - 7 . (canceled) 
     
     
         8 . Extrusion tool or die for the extrusion of metallic material, in particular a material of aluminium or alloys thereof, or other non-ferrous metals such as Cu and alloys thereof, the die being a modular type comprising die bodie/s with cavitie/s provided with insert/s, wherein the area of the die with strong thermo-mechanical solicitation comprising the die bodie/s, is made of a nickel, iron or cobalt based super alloy, whereas the die in the area with strong tribological solicitation comprising the insert/s, i.e. the mandrel and/or the bearing, is manufactured of a wear resistant material. 
     
     
         9 . Extrusion die according to  claim 8 , wherein the die is a two or more cavity die. 
     
     
         10 . Extrusion die according to  claim 8 , wherein the alloy is a nickel based superalloy containing Ni 39-78 wt %, Fe 0,0-36 wt %, Cr 12%-25 wt %, A10,0%-5 wt %, Co (min 0% max 20%), Mo-10 wt %, Nb-5 wt %. 
     
     
         11 . Extrusion die according to  claim 8 , wherein the alloy is a cobalt based superalloy: containing Co 34-50 wt %, Ni 10-29 wt %, Fe 3-26 wt %, Cr 3-22 wt %, A 10,0-6 wt %), Nb 0,0-3 wt %, W 0,0-15 wt %. 
     
     
         12 . Extrusion die according to  claim 8 , wherein the alloy is an iron based superalloys containing Fe 42-74 wt %, Ni 0,0-38 wt %, Cr 0,0-20 wt %, A10,0%-5 wt %, Co-15 wt %, Mo 0,0%-5%, Nb 0,0-5 wt %) 
     
     
         13 . Extrusion die according to  claim 8 , wherein the wear resistant material is a high speed tool steel, a precipitation hardened steel or a high alloy hot-worked steel and alloys being obtained by a standard forging process, a spray forming technique or by powder metallurgy technology. 
     
     
         14 . Extrusion die according to  claim 8 , wherein the wear resistant material is surface hardened by surface nitriding or similar process or is provided with a surface coating based on chemical vapour deposition (CVD), plasma assisted/enhanced chemical vapour deposition (PACVD/PECVD), physical vapour deposition (PVD) or other spraying processes such as flame spray, cold spray/high velocity, plasma spray or high velocity oxyfuel spray.