System for and method of linking by friction welding a first piece of steel to a second piece of steel with use of ni-based alloys adapter

Abstract

A system ( 200 ) is provided, comprising a two-sided adapter ( 205 ), made of a Ni-based alloy, that is connected at each of the two sides with a different type of metal, e.g. steel ( 201, 202 ), and wherein the connection ( 203 ) of the different types of metal, e.g. steel ( 201, 202 ) with the adapter ( 205 ), wherein it is achieved at least in part by use of friction welding. A method for linking different types of metal, e.g. steel ( 201, 202 ) by using a two-sided adapter ( 205 ) as an intermediate, wherein at least one of the adapter-metal (e.g. steel) connections ( 203 ) is made by means of friction welding, is also provided.

1 . A system comprising: a two-sided tubular adapter made of a Ni-based alloy, connected to either a first piece of metal and/or to a second piece of metal, wherein the first and second piece differ in at least one chemical or physical parameter; wherein the connection of at least the first or the second piece with the adapter is is made by friction welding. 
     
     
         2 . The system of  claim 1 , wherein the first piece of metal and/or the second piece of metal are made of steel. 
     
     
         3 . The system of  claim 1 , wherein the two-sided tubular adapter is a ring shape or donut shaped. 
     
     
         4 . The system of  claim 1 , wherein the first piece of material is made of martensitic steel and/or the second piece of material is made of austenitic steel. 
     
     
         5 . The system of  claim 1 , wherein the Ni-based alloy is additive manufactured. 
     
     
         6 . The system of  claim 1 , wherein the Ni-based alloy is made of EPRI P87 alloy, A617 alloy, or A82 alloy. 
     
     
         7 . The system of  claim 1 , wherein the first piece of material is made of austenitic steel, and/or the second piece of material is made of another Ni-based alloy, differing from the Ni-based alloy out of which the two-sided tubular adapter is made. 
     
     
         8 . The system of  claim 1 , wherein the two-sided tubular adapter is provided with edge-shaped end surfaces. 
     
     
         9 . A method for linking a first piece of metal to a second piece of metal, wherein the first and second piece differ in at least one chemical or physical parameter, the method comprising (i) providing a connection between the first piece and one side of a two-sided tubular adapter, made of an Ni-based alloy; and (ii) providing a connection between the second piece and the other side of the two-sided adapter, wherein at least for one of (i) or (ii) friction welding is used. 
     
     
         10 . The method of  claim 9 , wherein the first piece of metal and/or the second piece of metal are made of steel. 
     
     
         11 . The method of  claim 9 , wherein the two-sided tubular adapter is a ring shape or donut shaped. 
     
     
         12 . The method of  claim 9 , wherein the first piece of material is made of martensitic steel, and/or the second piece of material is made of austenitic steel. 
     
     
         13 . The method of  claim 9 , wherein one of (i) or (ii) comprises laser beam welding the first or second piece to one or the other side of a two-sided adapter. 
     
     
         14 . The method of  claim 9 , wherein one of (i) or (ii) comprises additive manufacturing onto the first or second piece the two-sided adapter. 
     
     
         15 . The method of  claim 9 , wherein the Ni-based alloy is additive manufactured. 
     
     
         16 . The method of  claim 9 , wherein the Ni-based alloy is EPRI P87 alloy, A617 alloy, or A82 alloy. 
     
     
         17 . The method of  claim 9 , wherein the first piece of material is made of austenitic steel, and/or the second piece of material is made of another Ni-based alloy, preferably differing from the Ni-based alloy out of which the two-sided tubular adapter is made. 
     
     
         18 . Use of the system of  claim 1 , wherein the first and second pieces are hollow tubes. 
     
     
         19 . The use of  claim 18 , wherein the tube wall thickness is less than 25 mm. 
     
     
         20 . The use of the system of  claim 1  in combination with forging or re-forging and/or piercing processes for manufacturing said two-sided tubular adapter.