WO2007119832A1 - ガスタービン燃焼器用Ni基耐熱合金 - Google Patents
ガスタービン燃焼器用Ni基耐熱合金 Download PDFInfo
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- WO2007119832A1 WO2007119832A1 PCT/JP2007/058196 JP2007058196W WO2007119832A1 WO 2007119832 A1 WO2007119832 A1 WO 2007119832A1 JP 2007058196 W JP2007058196 W JP 2007058196W WO 2007119832 A1 WO2007119832 A1 WO 2007119832A1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/056—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 10% but less than 20%
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/055—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 20% but less than 30%
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/002—Wall structures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M2900/00—Special features of, or arrangements for combustion chambers
- F23M2900/05004—Special materials for walls or lining
Definitions
- the present invention relates to a Ni-base heat-resistant alloy for producing a gas turbine combustor.
- the Ni-base heat-resistant alloy of the present invention relates to a member for producing a liner for a gas turbine combustor or a member for producing a transition piece.
- the present invention relates to a liner or transition piece for a gas turbine combustor made of this Ni-base heat-resistant alloy.
- a combustor in a gas turbine is located from the rear outer periphery of a compressor, sprays fuel on the compressor discharge air, and burns it to generate a high-temperature and high-pressure gas for driving the turbine. It plays a role of guiding the nozzle to the nozzle (static blade) at the turbine inlet.
- the liner (inner cylinder) and transition piece (tail cylinder) are exposed to combustion gas at 1500 to 2000 ° C, so these parts are heated to 700 to 900 ° C and at this temperature. The shape must be maintained.
- liners and transition pieces are subjected to frequent thermal cycles of heating and cooling with frequent start, stop and power control.
- combustor liners and transition pieces As a material for producing gas turbine combustor liners and transition pieces, it has excellent high temperature strength such as high temperature tensile strength, creep rupture strength, low cycle fatigue strength, thermal fatigue strength, and high temperature acid resistance. It is also necessary to have excellent high-temperature corrosion resistance such as heat resistance and high-temperature sulfidation resistance.
- combustor liners and transition pieces are manufactured by hot and cold processing of various Ni-base heat-resistant alloy sheets, followed by brazing and welding. It is said that it is necessary to have a material that also has both good and brazing properties.
- Ni-based heat resistant alloys have been used as materials for the liners and transition pieces of these combustors.
- a specific example of this Ni-based heat-resistant alloy is the mass% (below ,% Indicates mass 0 / o), 22% Cr—1.5% Co—18.5% Fe—9% Mo—0.6% W-0. 1% C—the balance Ni Ni Alloy and 22% Cr—8% Co—9% Mo— 3% W-l% Al-0. 3% Ti-0. 07% C—solid solution strengthened typified by Ni-base heat-resistant alloy consisting of Ni Precipitation of weak precipitation type alloys, or 20% Cr—20% Co—5.9% Mo—0.5% Al—2. L% Ti-0.06% C—Ni-based heat-resistant alloy with balance N A reinforced alloy was used.
- MC carbide is at least 50% of existing carbide
- a Ni-base heat-resistant alloy with an average grain size of about ASTM # 3 to 5 has been proposed.
- the MC carbide dispersed in the Ni-base heat-resistant alloy substrate has a diameter of 3 m or less.
- TiN phase is present in the Ni-base heat-resistant alloy substrate in an amount of 0.05% or less, and Ni (Al, Ti)
- the present inventors do not have a life shorter than the required life of the liner and transition piece of the combustor even when the gas turbine combustor having a complicated shape is operated at a high output.
- Research was conducted to develop a base heat-resistant alloy.
- a Ni-base heat-resistant alloy having the following characteristics (a) to (c) as the component. .
- the Ni-base heat-resistant alloy is the highest among the high-temperature strength properties such as high-temperature tensile strength, creep rupture strength, low cycle fatigue strength, thermal fatigue strength, and creep fatigue strength, especially when tension is applied as shown in Fig. 2. It is necessary to have excellent strength against creep fatigue caused by repeated application of tension and compression that is maintained for a certain period of time in a strain load state. Creep ductility is an important factor for creep fatigue properties on the relatively high strain load side, and it is important that intergranular deformation occurs without intergranular fracture. It has high ductility while having.
- the Ni-based heat-resistant alloy Since the Ni-based heat-resistant alloy is exposed to a severe high-temperature atmosphere, it has excellent high-temperature corrosion resistance such as high-temperature acid resistance and high-temperature sulfidation resistance that can withstand this atmosphere for a long time.
- high-temperature corrosion resistance such as high-temperature acid resistance and high-temperature sulfidation resistance that can withstand this atmosphere for a long time.
- the heat transfer coefficient is high in the part with high surface roughness, while the heat transfer coefficient is low in the part with low surface roughness, which causes temperature gradient or temperature distribution variation, which causes thermal fatigue. Because of this, Ni-base heat-resistant alloy sheets used to manufacture gas turbine combustors are less prone to surface roughness due to processing!
- Ni-base heat-resistant alloys having the characteristics described in (a) to (c) above are in mass%, Cr: 14.0 to 21.5%, Co: 6.5 to 14.5%, Mo : 6.5 to 10.0%, W: 1.5 to 3.5%, A1: 1.2 to 2.4%, Ti: l to 1 to 2.
- a Ni-base heat-resistant alloy with a V-shaped structure and excellent workability is produced, and the ⁇ 'phase is precipitated by aging the Ni-base heat-resistant alloy, resulting in a mixed phase force of ⁇ and ⁇ ' phases.
- the substrate MC type carbides and MC type carbides are uniformly dispersed to form a structure.
- the present invention has been made based on hard research results.
- the Ni-base heat-resistant alloy excellent in workability of this invention has the following aspects.
- the first embodiment of the Ni-base heat-resistant alloy of the present invention is, in mass%, Cr: 14.0-21.5%, Co: 6.5-14.5%, Mo: 6.5-10.0%, W: 1.5-3.5%, Al : l.2 to 2.4%, Ti: l. 1 to 2. l%, Fe: 7.0% or less, B: 0.001 to 0.020%, C: 0.03 to 0.15%, the remainder being Ni and inevitable impurities
- the content of S and P contained as unavoidable impurities is mass%, S: 0.015% or less, P: 0.015% or less, the composition of the component, and MC type carbide in the substrate made of ⁇ phase And MC type carbide
- Ni-base heat-resistant alloy for gas turbine combustor processing with a uniformly dispersed structure Ni-base heat-resistant alloy for gas turbine combustor processing with a uniformly dispersed structure.
- the second aspect of the Ni-base heat-resistant alloy of the present invention is, in mass%, Cr: 14.0-21.5%, Co: 6.5-14.5%, Mo: 6.5-10.0%, W: 1.5-3.5%, Al : l.2 to 2.4%, Ti: l. 1 to 2.1%, Fe: 7.0% or less, Nb: 0.1 to 1.0%, B: 0.001 to 0.020%, C: 0.03 to 0.15%, the rest
- the composition of S and P contained in the inevitable impurities is specified as mass%, S: 0.015% or less, P: 0.015% or less, and ⁇ phase substrate MC type carbide and MC
- the present inventors conducted further research on the MC type carbide and MC type carbide.
- M is the mass 0/0 in, Ni: 12.0 ⁇ 45.0%, Cr: 9.0 ⁇ 22.0%, Co: 0.5 ⁇ 1 3.5%, W: 2.0 ⁇ 24.0%, Al: 5.0% or less, Ti: 0.5 to 6.0 It is preferable that the composition has a component composition containing% and the balance of Mo and inevitable impurities. Further, M in the MC-type carbide dispersed in the Ni-base heat-resistant alloy alloy of the first aspect is mass%, Ni: 7.0% or less, Cr: 6.0% or less, Co: 12.0% or less, Mo: 57.0 %, W: l 5% or less, Al: 6.0% or less, the balance is Ti and inevitable impurities It is preferable to have a composition.
- M is the mass 0/0 in, Ni: 12.0 ⁇ 45.0%, Cr: 9.0 ⁇ 22.0%, Co: 0.5 ⁇ 1 3.5%, W: 2.0 ⁇ 24.0%, Al: 5.0% or less, Ti: 0.5 to 6.0 %, Nb: not more than 0%, and the balance preferably has a component composition with Mo and inevitable impurity power.
- M in the MC type carbide dispersed in the Ni-base heat-resistant alloy substrate of the second aspect is mass%, Ni: 7.0% or less, Cr: 6.0% or less, Co: 12.0% or less, Mo: 57.0% In the following, it is preferable that the composition contains W: 15% or less, Nb: 65% or less, Al: 6.0% or less, with the balance being Ti and inevitable impurities.
- the Ni-base heat-resistant alloy having excellent workability according to the present invention has the following aspects.
- the Ni-base heat-resistant alloy according to the third aspect of the present invention is a Ni-base heat-resistant alloy for gas turbine combustor processing that is effective in the first aspect, and M in the MC type carbide is mass%.
- M is mass%, Ni: 7.0% or less, Cr: 6.0% or less, Co: 12.0% or less, Mo: 57.0% or less, W : 15% or less, Al: 6.
- Ni-base heat-resistant alloy according to the fourth aspect of the present invention is a Ni-base heat-resistant alloy for gas turbine combustor machining superior in workability, which is superior to the second aspect, and is suitable for the MC type carbide.
- M is the mass 0/0, Ni: 12.0 ⁇ 45.0% , Cr: 9.0 ⁇ 22.0%, Co: 0.5 ⁇ 13.5%, W: 2.0 ⁇ 24.0%, A1: 5.0% or less, Ti: 0.5 to 6.0% Nb: 1% or less
- M in the MC-type carbide is mass%, Ni: 7.0% or less, Cr: 6.0% or less, Co: 12.0% or less, Mo: 57
- This is a Ni-base heat-resistant alloy having a component composition of 0.0% or less, W: 15% or less, Nb: 65% or less, Al: 6.0% or less, with the balance being Ti and inevitable impurities.
- Ni-base heat-resistant alloy for gas turbine combustors with excellent workability You can get power S. Mass 0/0, Cr:. 14. 0 ⁇ 21 5%, Co:. 6. 5 ⁇ 14 5%, Mo:. 6. 5 ⁇ 10 0%, W:. 1. 5 ⁇ 3 5%, Al: l. 2 to 2.4%, Ti: l. 1 to 2. l%, Fe: 7.0% or less, B: 0.001 to 0.020%, C: 0.03 to 0.
- an ingot is obtained by melting a Ni-base heat-resistant alloy having a component composition specified so that the respective contents are mass%, S: 0.001% or less, and P: 0.015% or less.
- the temperature is between ⁇ 'solvus + 20 ° C to ⁇ ' solvus + 200 ° C.
- processing at a processing rate of 15% or more is performed at least twice or more in the desired product area in the temperature range from heating temperature to ⁇ 'solvus-150 ° C. After that, after cold working as necessary, heat treatment between ⁇ solvus + 20 ° C to ⁇ , solvus + 200 ° C, and then cool down the solution. .
- the Ni-base heat-resistant alloy with excellent workability obtained in this way is usually formed into a plate.
- Ni-base heat-resistant alloy plate having excellent workability is subjected to secondary processing such as press force bending, bending force check and drawing, and further welded to thereby form a liner and transition pin for the combustor.
- secondary processing such as press force bending, bending force check and drawing
- aging treatment is applied to finish the ⁇ phase substrate to further precipitate the phase and enhance the high temperature strength properties such as low cycle fatigue and creep fatigue properties. This aging treatment causes the ⁇
- Type 6 carbide is M C
- Ni-base heat-resistant alloys with this structure are particularly excellent in creep fatigue strength, and other high-temperature strength and high-temperature ductility are further improved, such as combustor liners and transition pieces in gas turbines, etc. It has excellent properties as a member.
- the aging treatment at this time is performed by cooling after holding at a temperature of 650 to 900 ° C. for 12 to 48 hours.
- the Ni-based heat resistant gas turbine combustor excellent in creep fatigue characteristics of the present invention The alloy has the following aspects.
- the Ni-based heat-resistant alloy of the fifth aspect of the present invention is, in mass%, Cr: 14.0-21.5%, Co: 6.5-14.5%, Mo: 6.5-10.0%, W: 1.5-3.5%, Al : l.2 to 2.4%, Ti: l. 1 to 2. l%, Fe: 7.0% or less, B: 0.001 to 0.020%, C: 0.03 to 0.15%, the remainder being Ni and inevitable impurities
- the composition of S and P contained as the inevitable impurities is defined as mass%, S: 0.015% or less, P: 0.015% or less, and the mixed phase force of ⁇ phase and phase MC type carbide inside
- Ni-based heat resistant alloy for gas turbine combustors with a structure in which MC type carbides are uniformly dispersed.
- Ni-base heat-resistant alloy according to the sixth aspect of the present invention is, in mass%, Cr: 14.0-21.5%, Co: 6.5-14.5%, Mo: 6.5-10.0%, W: 1.5-3.5%, Al : l.2 ⁇ 2.4%, Ti: l
- M in MC type carbide dispersed in the Ni-base heat-resistant alloy base material obtained by aging treatment according to the fifth aspect described in (5) is mass%, Ni: 12.0 to 45.0%, Cr: 9.0-2
- the composition has a component composition in which the balance is Mo and the balance is Mo and inevitable impurities.
- M in the MC-type carbide dispersed in the Ni-base heat-resistant alloy substrate of the fifth aspect is mass%, Ni: 7.0% or less, Cr: 6.0% or less, Co: 12.0% or less, Mo: 57.0 More preferably, it is a Ni-base heat-resistant alloy having a component composition of not more than%, W: not more than 15%, Al: not more than 6.0%, and the balance comprising Ti and inevitable impurities.
- M in MC type carbide dispersed in the Ni-base heat-resistant alloy base material obtained by aging treatment according to the sixth aspect of (6) is mass%, Ni: 12.0 to 45.0%, Cr: 9.0-2
- M in the MC-type carbide dispersed in the Ni-base heat-resistant alloy substrate of the sixth aspect is mass%, Ni: 7.0% or less, Cr: 6.0% or less, Co: 12.0% or less, Mo: 57.0 It is preferable that it has a component composition comprising% or less, W: 15% or less, Nb: 65% or less, Al: 6.0% or less, with the balance being Ti and inevitable impurities.
- the Ni-base heat-resistant alloy for gas turbine combustors having excellent creep fatigue characteristics has the following aspects.
- the Ni-base heat-resistant alloy according to the seventh aspect of the present invention is a Ni-base heat-resistant alloy for gas turbine combustors that works according to the fifth aspect, and is a Ni-base heat-resistant alloy obtained by the aging treatment.
- M in MC type carbide dispersed in the substrate is mass%, Ni: 12.0-45.0%, Cr: 9
- M is in mass%, Ni: 7.0% or less, Cr: 6.0% or less, Co: 12.0% or less, This is a Ni-based heat-resistant alloy containing Mo: 57.0% or less, W: 15% or less, Al: 6.0% or less, and the balance being composed of Ti and inevitable impurities.
- the Ni-base heat-resistant alloy of the eighth aspect of the present invention is a Ni-base heat-resistant alloy for a gas turbine combustor that is powerful in the sixth aspect, and is a Ni-base heat-resistant alloy obtained by the aging treatment.
- M in MC type carbide dispersed in the substrate is mass%, Ni: 12.0-45.0%, Cr: 9
- M is in mass%, Ni: 7.0% or less, Cr: 6.0% or less, Co: 12.0% or less, Mo: 57.0% or less, W: 15% or less, This is a Ni-based heat resistant alloy containing Nb: 65% or less, Al: 6.0% or less, and the balance of Ti and inevitable impurities.
- the MC type carbide and the MC type carbide uniformly dispersed in the Ni-base heat-resistant alloy substrate for gas turbine combustor according to (1) to (8) of the present invention both have an average particle size of 0.3 to
- the total of MC type carbide and MC type carbide in the substrate is 0.5-16.
- the ninth aspect of the present invention This embodiment has the following configuration.
- Ni-base heat-resistant alloy for a gas turbine combustor is the first, second, third, fourth, fifth, sixth, seventh or eighth aspect.
- Ni-base heat-resistant alloy for gas turbine combustors which is good for both MC type carbide and MC type carbide
- Average particle size 0.3-4. O / z m, with MC type carbide and MC type carbide in the substrate
- the Cr component forms a good protective coating to improve the high temperature corrosion resistance such as high temperature oxidation resistance and high temperature sulfidation resistance of the alloy, further forms C and MC type carbides, and MC type carbonization.
- the Cr component also suppresses secondary recrystallization and grain growth during secondary processing, and improves grain boundary strength.
- the Cr component forms C and MC type carbides, and contributes to the refinement of crystal grains by growing MC type carbides produced mainly from Ti to the desired grain size and area ratio. .
- the Cr component also has the effect of suppressing secondary recrystallization and grain growth during secondary processing, and further has the effect of improving the grain boundary strength by forming MC-type carbides by aging. But Cr
- the content is less than 14.0%, the desired high-temperature corrosion resistance cannot be ensured. On the other hand, if the content exceeds 21.5%, harmful phases such as ⁇ phase and phase are precipitated. Rather, the high temperature corrosion resistance is reduced. Therefore, the Cr content was determined to be 14.0 to 21.5% by mass. A more preferable range of Cr content is 15.5 to 20% in terms of mass%.
- the Co component is mainly dissolved in the substrate ( ⁇ phase) to improve the creep characteristics, and further, C and MC type carbides are formed. Growth to area ratio contributes to refinement of crystal grains and secondary re-processing during secondary processing Has the effect of suppressing crystal and crystal grain growth. However, if the content is less than 6.5%, it is not preferable because sufficient creep properties cannot be imparted if it is less than 6.5%. On the other hand, if Co exceeds 14.5%, hot workability is reduced. At the same time, the hot ductility during use of the combustor or the like is lowered, which is not preferable. Therefore, the Co content was determined to be 6.5-14.5% by mass. A more preferable range of the Co content is 7.5% to 13.5% by mass%.
- the Mo component has the effect of improving the high temperature tensile property, creep property and creep fatigue property by dissolving in the substrate ( ⁇ phase), and this effect exhibits a combined effect especially in coexistence with W.
- Mo also forms C and MC type carbides to strengthen the grain boundaries and
- Mo forms C and MC type carbides, and contributes to refinement of crystal grains by growing MC type carbides produced mainly from Ti to the desired grain size and area ratio. It has the effect of suppressing secondary recrystallization and grain growth during secondary processing.
- its content is less than 6.5% by mass, sufficient high temperature ductility and creep fatigue properties cannot be imparted.
- the Mo content exceeds 10.0%, hot workability deteriorates and a harmful phase such as a phase precipitates, resulting in brittleness. Therefore, the Mo content is defined as 6.5% to 10.0% in mass%.
- a more preferable range of the Mo content is 7.0 to 9.5% by mass.
- the W component is combined with solid solution strengthening in the base material in the presence of Mo. If strengthening the grain boundaries by forming C and MC type carbides,
- MC-type carbides are formed, and especially MC-type carbides produced mainly from Ti are grown to the desired grain size and area ratio, contributing to refinement of crystal grains and secondary re-processing during secondary processing. Has the effect of suppressing crystal and crystal grain growth. If the W content is less than 1.5%, sufficient high-temperature ductility and creep fatigue properties cannot be imparted. On the other hand, if the W content exceeds 3.5%, the hot workability deteriorates and the ductility also decreases. Therefore, the content of W is set to 1.5 to 3.5% by mass%. A more preferable range of the W content is 2.0% to 3.0% by mass.
- the A1 component forms the ⁇ 'phase (Ni A1), which is the main precipitation strengthening phase, through aging treatment.
- A1 forms C and MC type carbides, and contributes to the refinement of crystal grains by growing MC type carbides produced mainly from Ti to the desired grain size and area ratio. It has the effect of suppressing secondary recrystallization and grain growth during subsequent processing.
- the content of A1 is set to 1.2 to 2.4% by mass%.
- a more preferable range of the content of A1 is 1.4% to 2.2% by mass.
- the Ti component is mainly dissolved in the ⁇ 'phase to improve high temperature tensile properties, creep properties and creep fatigue properties, and to provide high temperature strength.
- Ti has the effect of forming C and MC type carbides to refine crystal grains, suppress secondary recrystallized grains and grain growth during secondary processing, and improve grain boundary strength.
- the Ti content is less than 1.1%, the desired high-temperature strength cannot be ensured because the precipitation ratio of the ⁇ 'phase is insufficient.
- the Ti content exceeds 2.1%, hot workability deteriorates, which is not preferable.
- the S content of Ti and the content of Ti in mass% were determined as 1.1 to 2.1%. A more preferable range of the Ti content is 1.3% to 1.9% by mass%.
- B component has the effect of improving the grain boundary strength by forming MB type carbide with Cr, Mo, etc.
- the content of B in the mass 0/0 was defined as from 0.001 to 0.020 percent.
- a more preferable range of the B content is mass%, and is 0.002-0.010%.
- C component forms Ti and Mo, MC and MC type carbides, contributing to finer grain
- the grain boundary pinning effect cannot be obtained.
- C is contained in an amount exceeding 0.15%, the amount of the carbide is excessive, and hot workability, weldability, ductility, and the like are deteriorated. Therefore, the mass 0/0 content and C, was defined as 0. 03-0. 15%.
- a more preferable range of the content of C is mass%, which is 0.05-0.12%.
- the Fe component is inexpensive and economical and has the effect of improving hot workability, so it is added as necessary. However, if the Fe content exceeds 7% by mass, the high-temperature strength deteriorates, which is not preferable. Therefore, the Fe content is determined to be 7% or less (including 0%) in mass% (more preferably 4% or less in mass%).
- the Nb component is dissolved in the base ( ⁇ phase) and ⁇ ′ phase to improve high temperature tensile properties, creep properties and creep fatigue properties, and to bring high temperature strength.
- Nb has the effect of forming C and MC type carbides to refine crystal grains, suppressing secondary recrystallized grains and grain growth during secondary processing, and improving grain boundary strength. Therefore, Nb is necessary Add as appropriate.
- the Nb content is less than 0.1% by mass, sufficient tally fatigue characteristics cannot be imparted.
- the Nb content exceeds 1.0%, the hot additivity deteriorates. Therefore, the Nb content was determined to be 0.1 to 1.0% by mass.
- a more preferable range of the Nb content is 0.2% to 0.8% by mass.
- the component composition of M in the MC type carbide is mass%, Ni: 12.
- the MC type carbides and MC carbides uniformly dispersed in the Ni-base heat-resistant alloy substrate of the present invention are determined to have an average particle size of 0.3 to 4.
- the more preferable average particle diameter of the above is 0.4 to 3.
- C carbides are not preferred because even if they are dispersed in the substrate in an area ratio of less than 0.5%, sufficient effects are not exhibited. On the other hand, if the area ratio exceeds 16.0%, ductility decreases, bending workability and deep drawability deteriorate, and cracks are generated and routed during operation, resulting in short life. This is not preferable. Therefore, the area ratio of MC type carbide and MC carbide uniformly dispersed in the Ni-base heat-resistant alloy substrate of the present invention is set to 0.5 to 16.0%.
- the preferred area ratio of one layer is 1.5 to 13.0%.
- the Ni-based heat-resistant alloy of the present invention exhibits excellent performance over a long period of time when used in various parts of a gas turbine engine, particularly a liner or a transition piece in a combustor of a gas turbine engine. To do.
- FIG. 1 is an explanatory diagram for explaining a waveform of strain in a low cycle fatigue test.
- FIG. 2 is an explanatory diagram for explaining a waveform of strain in a creep fatigue test.
- FIG. 3 is a photograph of the backscattered electron (composition) image structure of the solution treatment material.
- FIG. 4 is a photograph of the backscattered electron (composition) image structure of an aging treatment material.
- Ni-base heat-resistant alloy of the present invention will be specifically described with reference to examples.
- Ni-base heat-resistant alloy 126 Using an ordinary high-frequency vacuum melting furnace, each had the composition shown in Tables 1 to 3.
- the present invention Ni-base heat-resistant alloy 126, comparative Ni-base heat-resistant alloy 118, and conventional Ni-base heat-resistant alloy Melting and forging Ni-base alloy melts that have the strength to produce ingots having a diameter of 100 mm and a height of 150 mm. This ingot was hot forged to produce a hot forged body having dimensions of thickness: 50 mm, width: 120 mm, and length: 200 mm.
- This hot forged body was further hot-rolled to produce a hot rolled sheet having a thickness of 5 mm and a thickness of 20 mm.
- These hot-rolled sheets obtained were maintained at a temperature of 1100 ° C for 10 minutes and then subjected to solution cooling with air cooling, so that they had the component composition shown in Table 13 and the average grain size shown in Table 46.
- MC with diameter MC with diameter
- the present invention has a structure in which type 6 carbide and MC carbide are uniformly dispersed in the substrate at the area ratio shown in Table 46.
- Ni-base heat-resistant alloy 1 26 comparison Ni-base heat-resistant alloy:! ⁇ 18 and conventional A solution-treated plate A having a thickness of 5 mm and a solution-treated plate B having a thickness of 20 mm were prepared. Furthermore, the solution treatment plate A having a thickness of 5 mm is kept at a temperature of 850 ° C. for 24 hours and then air-cooled, and further kept at a temperature of 760 ° C. for 16 hours and then subjected to an aging treatment under the air-cooling condition. An aging plate A having a thickness of 5 mm was prepared.
- the solution treated plate B having a thickness of 20 mm is kept at a temperature of 850 ° C. for 24 hours and then air-cooled, and further kept at a temperature of 760 ° C. for 16 hours and then subjected to an aging treatment under air-cooling conditions.
- an aging treatment plate B having a thickness of 20 mm was produced.
- the average grain size and area ratio were measured by taking a Ni-based heat-resistant alloy in a 400 times metallographic photograph and analyzing the metallographic photograph.
- the results are shown in Tables 4-6.
- the structure of the solution base plate A of the Ni-base heat-resistant alloy 1 of the present invention 1 is taken as a 2000 times reflected electron (composition) image photograph, This is shown in Fig. 3.
- MC carbide and MC carbide are mixed in the ⁇ phase substrate.
- MC type carbide is more dispersed than MC carbide.
- the present invention Ni-base heat-resistant alloy 1-26, comparative Ni-base heat-resistant alloy 1-18 and conventional Ni-base heat-resistant alloy, the structure of the aging treatment plate A is taken 2000 times reflected electron (composition) image photograph, Observations were made.
- the structure of the aging plate A of the Ni-base heat-resistant alloy 1 of the present invention is shown in FIG. In Fig. 4, the surface of the substrate appears rough, indicating that the ⁇ 'phase is mixed in the ⁇ phase substrate.
- the diameter and area ratio are almost the same as the solution-treated plate A, and the MC type carbide is fine at the grain boundaries.
- Ni-base heat-resistant alloy 1 to 26 comparison Ni-base heat-resistant alloy 1 to 18 and conventional Ni-base heat-resistant alloy cover thickness: 5mm solution-treated plate A The processability was evaluated.
- Ni-base heat-resistant alloy 1-26, comparison Ni-base heat-resistant alloy 1-18 and conventional solution-treated plate A made of Ni-base heat-resistant alloy A has thickness: 5mm, width: 20mm, length: 100mm
- Ni-base heat-resistant alloy 1-26, Comparison Ni-base heat-resistant alloy 1-18 and conventional solution heat-treated plate made of Ni-base heat-resistant alloy A Ring with thickness: 5mm, outer diameter: 140mm, inner diameter: 20mm A test specimen was collected. The diameter of these ring-shaped test pieces: A hole enlargement test was carried out by expanding a 20mm hole by expanding the hole expansion rate by 35%. The presence or absence of cracks in the hole expanded and the surface near the hole Roughness was measured. The results are shown in Tables 4-6.
- the solution-treated plate made of the Ni-base heat-resistant alloy 126 according to the present invention is compared with the L deviation.
- the solution treatment made of the Ni-base heat-resistant alloy 118 and the conventional Ni-base heat-resistant alloy is also compared. It can be seen that there is no cracking at the time of processing compared to the surface plate, and that the surface roughness is small and the workability is excellent.
- Ni-base heat-resistant alloy 1 26 comparative Ni-base heat-resistant alloy 1 18 and conventional A solution-treated plate B made of a Ni-base heat-resistant alloy with a thickness of 20 mm is air-cooled after holding it for 24 hours at a temperature of 850 ° C, and then air-cooled after holding for 16 hours at a temperature of 760 ° C. Effect treatment was performed.
- a round bar specimen having dimensions of a parallel part diameter of 8 mm and a parallel part length of 110 mm was collected from the aging plate B having a thickness of 20 mm thus obtained. These specimens were heated to a temperature of 700 ° C, and a low-cycle fatigue test was performed by repeatedly applying a strain range of 1.2% of tensile Z compression as shown in Fig. 1. The number of cycles that would be 75% (25% reduction) of the load was measured. The results are shown in Tables 7-9.
- An aging treatment plate B having a thickness of 20 mm prepared in advance A round bar specimen having dimensions of parallel part diameter: 8 mm and parallel part length: 110 mm was collected. These specimens were heated to 700 ° C, and as shown in Fig. 2, the tensile time when the maximum strain load was maintained for 60 minutes only when tensile strain was applied. A tally fatigue test was conducted by repeatedly applying 2%, and the number of cycles at which the measured load was 75% (25% reduction) of the initial load was measured. The results are shown in Tables 7-9.
- a round bar test piece having dimensions of a parallel part diameter: 4 mm and a parallel part length: 26 mm was collected from the aging treatment plate A having a thickness of 5 mm prepared in advance. These specimens were heated to a temperature of 750 ° C., a creep rupture test was performed at a stress of 353 MPa, and a rupture time and an elongation at break were measured. The results are shown in Tables 7-9.
- Thickness prepared earlier 5mm from aging treatment plate A Parallel part diameter: 4mm, Parallel part length: A round bar specimen having a dimension of 26 mm was taken. These specimens were subjected to a high-temperature tensile test at temperatures of 700 ° C and 900 ° C, and 0.2% strength, tensile strength and elongation at break were measured. Table 10 12 shows the measurement results.
- the Ni-based alloy 1 26 of the present invention which has been aged after solution treatment, has a low cycle fatigue test, creep fatigue test, creep rupture test, high temperature tensile test. It can be seen that the test shows excellent values for deviation and deviation.
- the Ni-base heat-resistant alloy of the present invention is excellent in high-temperature strength such as high-temperature tensile strength, creep rupture strength, low cycle fatigue strength, and thermal fatigue strength, and also in high-temperature corrosion resistance such as high-temperature acid resistance and high-temperature sulfidation resistance. Because of its superiority, it can exhibit excellent performance over a long period of time when used in various parts of gas turbine engines, especially liners or transition pieces in gas turbine engine combustors. In addition, since the Ni-base heat-resistant alloy of the present invention is excellent in workability, it can be formed and processed with high precision even when manufacturing parts such as liners or transition pieces in a gas turbine engine having a complicated structure. .
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Priority Applications (3)
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EP07741632.9A EP2009123B1 (en) | 2006-04-14 | 2007-04-13 | Nickel-based heat-resistant alloy for gas turbine combustor |
US12/297,213 US8211360B2 (en) | 2006-04-14 | 2007-04-13 | Nickel-based heat resistant alloy for gas turbine combustor |
CN2007800131862A CN101421427B (zh) | 2006-04-14 | 2007-04-13 | 燃气轮机燃烧器用Ni基耐热合金 |
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JP2006111749A JP5147037B2 (ja) | 2006-04-14 | 2006-04-14 | ガスタービン燃焼器用Ni基耐熱合金 |
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US (1) | US8211360B2 (ja) |
EP (1) | EP2009123B1 (ja) |
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JP2018131667A (ja) * | 2017-02-17 | 2018-08-23 | 株式会社日本製鋼所 | Ni基合金、ガスタービン材およびクリープ特性に優れたNi基合金の製造方法 |
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FR2949234B1 (fr) * | 2009-08-20 | 2011-09-09 | Aubert & Duval Sa | Superalliage base nickel et pieces realisees en ce suparalliage |
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WO2015020117A1 (ja) * | 2013-08-06 | 2015-02-12 | 日立金属Mmcスーパーアロイ株式会社 | Ni基合金、ガスタービン燃焼器用Ni基合金、ガスタービン燃焼器用部材、ライナー用部材、トランジッションピース用部材、ライナー、トランジッションピース |
JP2015030908A (ja) * | 2013-08-06 | 2015-02-16 | 日立金属Mmcスーパーアロイ株式会社 | Ni基合金、ガスタービン燃焼器用Ni基合金、ガスタービン燃焼器用部材、ライナー用部材、トランジッションピース用部材、ライナー、トランジッションピース |
KR101801672B1 (ko) * | 2013-08-06 | 2017-11-27 | 히타치 긴조쿠 가부시키가이샤 | Ni기 합금, 가스 터빈 연소기용 Ni기 합금, 가스 터빈 연소기용 부재, 라이너용 부재, 트랜지션 피스용 부재, 라이너, 트랜지션 피스 |
US10208364B2 (en) | 2013-08-06 | 2019-02-19 | Hitachi Metals, Ltd. | Ni-based alloy, ni-based alloy for gas turbine combustor, member for gas turbine combustor, liner member, transition piece member, liner, and transition piece |
JP2018131667A (ja) * | 2017-02-17 | 2018-08-23 | 株式会社日本製鋼所 | Ni基合金、ガスタービン材およびクリープ特性に優れたNi基合金の製造方法 |
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US11131013B2 (en) | 2017-02-17 | 2021-09-28 | Japan Steel Works M&E, Inc. | Ni-based alloy, gas turbine material, and method for manufacturing Ni-based alloy |
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JP2007284734A (ja) | 2007-11-01 |
JP5147037B2 (ja) | 2013-02-20 |
US8211360B2 (en) | 2012-07-03 |
EP2009123A4 (en) | 2013-09-04 |
CN101421427B (zh) | 2010-12-29 |
EP2009123A1 (en) | 2008-12-31 |
US20090136382A1 (en) | 2009-05-28 |
CN101421427A (zh) | 2009-04-29 |
EP2009123B1 (en) | 2016-08-17 |
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