Welding additive material
View Patent ↗A steel has the following chemical composition (amounts in % by weight): 0.05-0.14 C, 8-13 Cr, 1-2.6 Ni, 0.5-1.9 Mo, 0.5-1.5 Mn, 0.15-0.5 Si, 0.2-0.4 V, 0-0.04 B, 2.1-4.0 Re, 0-0.07 Ta, 0-60 ppm Pd, remainder Fe and unavoidable impurities. The steel can be used effectively as a welding additive material and has outstanding properties at very high temperatures, in particular a good creep rupture strength/resistance and a good oxidation resistance.
1. A steel consisting of a chemical composition in percent by weight:
0.05-0.14 C,
8-13 Cr,
1-2.6 Ni,
0.5-1.9 Mo,
0.5-1.5 Mn,
0.15-0.5 Si,
0.2-0.4 V,
0-0.04 B,
2.1-4.0 Re,
0-0.07 Ta,
0-max. 60 ppm Pd,
remainder Fe and unavoidable impurities.
2. The steel as claimed in claim 1 , consisting of 0.10-0.14% by weight C.
3. The steel as claimed in claim 1 , consisting of 0.12% by weight C.
4. The steel as claimed in claim 1 , consisting of 12% by weight Cr.
5. The steel as claimed in claim 1 , consisting of 1-2.3% by weight Ni.
6. The steel as claimed in claim 1 , consisting of 1% by weight Mn.
7. The steel as claimed in claim 1 , consisting of 0.3-0.5% by weight Si.
8. The steel as claimed in claim 1 , consisting of 0.4% by weight Si.
9. The steel as claimed in claim 1 , consisting of 1.7% by weight Mo.
10. The steel as claimed in claim 1 , consisting of 3.0% by weight Re.
11. The steel as claimed in claim 1 , consisting of 0.005-0.2% by weight B.
12. The steel as claimed in claim 1 , consisting of 0.01% by weight B.
13. The steel as claimed in claim 1 , consisting of 50ppm Pd.
14. The steel as claimed in claim 1 , consisting of 0.35% by weight V.
15. The steel as claimed in claim 1 , consisting of 0.01% by weight Ta.
16. A method of assembling a gas turbine rotor, the method comprising:
providing two rotor discs; and
welding the two rotor disc together with a material including a steel as claimed in claim 1 .
17. The method as claimed in claim 16 , wherein welding comprises:
welding with said material as a welding additive material.