RU2002120541A - METHOD FOR PRODUCING FECRA1 MATERIAL AND MATERIAL AS SUCH - Google Patents

Claims (9)

1. A method of producing a FeCrAl material by gas spraying, the material also containing, in addition to iron (Fe), chromium (Cr) and aluminum (Al), minor fractions of one or more materials, such as molybdenum (Mo), hafnium (Hf ), zirconium (Zr), yttrium (Y), nitrogen (N), carbon (C) and oxygen (O), characterized in that the melting to be sprayed is obtained so that it contains 0.05-0.50 wt.% tantalum (Ta) and at the same time less than 0.10 wt.% titanium (Ti). 2. The method according to claim 1, characterized in that nitrogen gas (N ₂ ) is used as the gas for spraying and a certain amount of gaseous oxygen (O ₂ ) is added to the gas for spraying, where the specified amount of gaseous oxygen is such that it is obtained after spraying the powder contained 0.02-0.10 wt.% oxygen (O), and at the same time, so that the nitrogen content in the specified powder was 0.01-0.06 wt.%. 3. The method according to claim 1 or 2, characterized in that the smelting of such a composition is obtained that the powder obtained after spraying has the following composition, wt.%: Fe balance Cr 15-25 Al 3-7 Mo 0-5 Y 0.05-0.60 Zr 0.01-0.30 Hf 0.05-0.50 Ta 0.05-0.50 Ti 0-0.10 C 0.01-0.05 N 0.01-0.06 About 0.02-0.10 Si 0.10-0.70 Mn 0.05-0.50 P 0-0.08 S 0-0.005 4. The method according to claim 3, characterized in that a smelting of such a composition is obtained that the powder obtained after spraying has approximately the following composition, wt.%: Fe balance Cr 21 Al 4.7 Mo 3 Y 0.2 Zr 0.1 Hf 0.2 Ta 0.2 Ti <0.05 C 0.03 N 0.04 About 0.06 Si 0.4 Mn 0.15 P <0.02 S <0.001 5. The method according to claims 1, 2, 3 or 4, characterized in that the value of the formula ((3 × Y + Ta) × O) + ((2 × Zr + Hf) × (N + C), in which the elements represented as a percentage by weight in the heat, should be more than 0.04, but less than 0.35. 6. High-temperature material of a powdered metallurgical FeCrAl alloy obtained by gas spraying, where the material in addition to iron (Fe), chromium (Cr) and aluminum (Al) also contains minor fractions of one or more materials, such as molybdenum (Mo), hafnium ( Hf), zirconium (Zr), yttrium (Y), nitrogen (N), carbon (C) and oxygen (O), characterized in that the material includes 0.05-0.50 wt.% Tantalum (Ta) and at the same time less than 0.10 wt.% titanium (Ti). 7. The high temperature material according to claim 6, characterized in that the powder obtained by gas spraying has the following composition, in wt.%: Fe balance Cr 15-25 A1 3-7 Mo 0-5 Y 0.05-0.60 Zr 0.01-0.30 Hf 0.05-0.50 Ta 0.05-0.50 Ti 0-0.10 C 0.01-0.05 N 0.01-0.06 About 0.02-0.10 Si 0.10-0.70 Mn 0.05-0.50 P 0-0.08 S 0-0.005 8. The high temperature material according to claim 7, characterized in that the obtained powder has approximately the following composition, in wt.%: Fe balance Cr 21 Al 4.7 Mo 3 Y 0.2 Zr 0.1 Hf 0.2 Ta 0.2 Ti <0.05 C 0.03 N 0.04 About 0.06 Si 0.4 Mn 0.15 P <0.02 S <0.001. 9. High temperature material according to claims 6, 7 or 8, characterized in that the value of the formula is ((3 × Y + Ta) × O) + ((2 × Zr + Hf) × (N + C), in which the elements are represented in wt.%, in the heat should be more than 0.04, but less than 0.35.