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1. WO2003018239 - SOUDAGE D'UNE PIECE D'USURE SUR UNE PIECE METALLIQUE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

1. A method for welding a wearing piece to a metal work piece, wherein said wearing piece is a hard metal or a material having similar properties, said method being characterized by the following steps :

- firstly applying said wearing piece (2; 5) to said work piece (1; 4); and thereafter

- applying a nickel based welding wire (3; 6) to a contact surface at a joint between said wearing piece and said work piece; and

- welding said wearing piece to said work piece by means of welding said joint, wherein said welding is performed by one of the following techniques: TIG, MIG, MIG/MAG and plasma transferred arc.

2. The method as claimed in claim 1, wherein said wearing piece contains at least 50% wolfram carbide, preferably at least 80% wolfram carbide and more preferably at least 95% wolfram carbide .

3. The method as claimed in claim 1 or 2 , wherein said welding wire contains at least 95% nickel, preferably at least 99% nickel and more preferably at least 99.4% nickel.

4. The method as claimed in claim 3, wherein said welding wire contains 0.05-0.3% cobalt, preferably 0.1-0.2% cobalt and more preferably about 0.12% cobalt.

5. The method as claimed in claim 3 or 4, wherein said welding wire contains 0.05-0.3% manganese, preferably 0.1-0.2% manganese and more preferably about 0.14% manganese.

6. Use of a nickel based welding wire (3; 6) for welding of a wearing piece (2; 5) to a metal work piece (1; 4), wherein said wearing piece is a hard metal or a material having similar properties, and wherein said welding is performed by one of the following techniques: TIG, MIG, MIG/MAG and plasma transferred arc.

7. Use of a nickel based welding wire as claimed in claim 6, wherein said wearing piece contains at least 50% wolfram carbide, preferably at least 80% wolfram carbide and more preferably 95% wolfram carbide.

8. Use of a nickel based welding wire as claimed in claim 6 or 7, wherein said welding wire contains at least 95% nickel, preferably at least 99% nickel and more preferably at least 99.4% nickel.

9. Use of a nickel based welding wire as claimed in claim 8, wherein said welding wire contains at least 0.05-0.3% cobalt, preferably at least 0.1-0.2% cobalt and more preferably about 0,12% cobalt.

10. Use of a nickel based welding wire as claimed in claim 8 or 9, wherein said welding wire contains at least 0.05-0.3% manganese, preferably at least 0.1-0.2% manganese and more preferably about 0.14% manganese.