CN102251146B - Nickel-titanium-aluminum-based high-temperature alloy material and isothermal forging preparation method thereof - Google Patents
Nickel-titanium-aluminum-based high-temperature alloy material and isothermal forging preparation method thereof Download PDFInfo
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Abstract
The invention provides a nickel-titanium-aluminum-based high-temperature alloy material and an isothermal forging preparation method thereof. The nickel-titanium-aluminum-based high-temperature alloy material comprises the following components in percentage by weight: 40-50at percent of titanium, 45-55at percent of nickel, 1-6at percent of aluminum, 1-5at percent of niobium and 0.5-3at percent of ruthenium. The isothermal forging preparation method of the alloy comprises four steps of mixing raw materials according to the proportion of the nickel-titanium-aluminum-based high-temperature alloy material, vacuum induction melting, heat treatment and isothermal forging. According to the isothermal forging method of the nickel-titanium-aluminum-based high-temperature alloy material, which is provided by the invention, on the basis of a nickel-titanium-aluminum-based melting alloy, the room temperature, the high-temperature mechanical properties and high-temperature durable performance of the alloy are improved by using isothermal forging, so that the alloy has excellent durable performance; and the room temperature and the high-temperature mechanical properties of the nickel-titanium-aluminum-based high-temperature alloy material can be remarkably improved.
Description
Technical field
The invention belongs to the superalloy preparing technical field, relate to a kind of titanium-nickel-aluminum-base high-temperature alloy material, be specifically related to a kind of isothermal forging method of titanium-nickel-aluminum-base high-temperature alloy material, by at 950 ℃～980 ℃ titanium-nickel-aluminum-base high-temperature alloy being carried out room temperature, mechanical behavior under high temperature and the enduring quality that isothermal forging improves the titanium-nickel-aluminum-base alloy.
Background technology
At present, at power, petrochemical industry, transportation, the particularly industrial circle such as aviation and space flight, be applied in structural metallic materials more than 600 ℃ and be generally Ni-based, iron-based and cobalt base superalloy.These materials have higher density (generally at 8.0g/cm
3More than), made member and weight of equipment are large, in order to alleviate structural weight, raise the efficiency, and reduce energy consumption, must develop low density, high-intensity novel high-temperature alloy to adapt to the needs of related industries field future development.
The binary TiNi alloy is a kind of have good mechanical property, good solidity to corrosion and intermetallic compound of biocompatibility, is widely used in fields such as medical science, industry and lives as the shape memory alloy functional materials.The density of this alloy is 6.3g/cm
3About, than Ni-based, iron-based and cobalt base superalloy low about 20%.
On TiNi alloy basis, can significantly improve room temperature and the hot strength of alloy by adding the Al element, have the potentiality of using at aerospace field.The interpolation of Nb element can improve Alloy At Room Temperature, mechanical behavior under high temperature and high-temperature oxidation resistance.
At present, for the titanium-nickel-aluminum-base high-temperature structural material, usually adopt the method preparation of conventional melting, the room temperature tensile plasticity of alloy is lower, has limited its further application.And conventional forging method can not carry out machining deformation to it.
Summary of the invention
For problems of the prior art, the present invention proposes a kind of titanium-nickel-aluminum-base high-temperature alloy material and isothermal forging preparation method thereof, and this titanium-nickel-aluminum-base high-temperature alloy material is 1000MPa～1500MPa at 20 ℃ of tensile yield strengths, and deformation rate is greater than 5%; Yield strength 600 ℃～800 ℃ of high temperature is 400MPa～1450MPa, and deformation rate is greater than 15%.Reach 100h the creep rupture life of 800 ℃/137MPa.This isothermal forging making method can significantly improve room temperature and the mechanical behavior under high temperature of titanium-nickel-aluminum-base high-temperature alloy material.
The present invention proposes a kind of titanium-nickel-aluminum-base high-temperature alloy material, and composition according to weight percent is: the niobium (Nb) of the nickel (Ni) of the titanium of 40at%～50at% (Ti), 45at%～55at%, the aluminium (Al) of 1at%～6at%, 1at%～5at% and the ruthenium (Ru) of 0.5at%～3at%.The content of ruthenium is preferably 1at%～2at%.This titanium-nickel-aluminum-base high-temperature alloy is by NiTi matrix, black Ti
2Ni phase and white Nb solid solution phase form, Ti
2Ni phase intercrystalline precipitation.Along with the increase of Ti content in the alloy, Ti
2The content of Ni phase increases.This titanium-nickel-aluminum-base high-temperature alloy material is after the isothermal forging method preparation, still by NiTi matrix, black Ti
2Ni phase and white Nb solid solution phase form, but the crystal grain of titanium-nickel-aluminum-base high-temperature alloy elongates along the vertical direction of forging after isothermal forging.
The isothermal forging preparation method of a kind of titanium-nickel-aluminum-base high-temperature alloy material that the present invention also proposes comprises the following steps:
(1) be the titanium (Ti) of 40at%～50at%, the nickel (Ni) of 45at%～55at%, the aluminium (Al) of 1at%～6at%, the niobium (Nb) of 1at%～5at% and the ruthenium (Ru) of 0.5at%～3at% by proportioning, the content sum of above-mentioned each composition is 100%, takes by weighing purity and be 99.9% titanium (Ti), purity and be 99.9% nickel (Ni), purity and be 99.9% aluminium (Al), purity and be 99.9% niobium (Nb) and purity and be 99.9% ruthenium (Ru);
(2) the above-mentioned titanium that takes by weighing, nickel, aluminium, niobium and ruthenium raw material are put into the magnetic levitation vacuum induction melting furnace, raw material is put according to the fusing point order, above high melting point component is placed on, below low-melting component is placed on, volatile component is evacuated to 2 * 10 in the middle of other raw materials
-3Pa～5 * 10
-3Pa is filled with high-purity argon gas to 1 * 10
4～3 * 10
4Then Pa is smelted into the titanium-nickel-aluminum-base high-temperature alloy ingot at 2700 ℃～3000 ℃;
(3) the above-mentioned titanium-nickel-aluminum-base high-temperature alloy ingot that makes is put into vacuum heat treatment furnace and heat-treat, in vacuum tightness 2 * 10
-3Pa～5 * 10
-3Pa, after thermal treatment temp is incubated 12～24 hours 850 ℃～1000 ℃ times, furnace cooling;
(4) with wire cutting method the titanium-nickel-aluminum-base high-temperature alloy ingot is made the cylinder ingot casting, aspect ratio is no more than 2, preferably is of a size of Φ 90 * 150mm.The cylinder ingot casting is heated to 970～1000 ℃ in heat treatment furnace, then insulation 2～2.5h puts into and forges and presses distortion on the hydropress, and forging temperature is 950～980 ℃, 1 * 10
-5～1 * 10
-4s
-1Strain rate under carry out isothermal forging, deflection is 40%～60%.
The invention has the advantages that:
(1) a kind of titanium-nickel-aluminum-base high-temperature alloy material and the isothermal forging preparation method thereof of the present invention's proposition on induction melting titanium-nickel-aluminum-base high-temperature alloy basis, put forward heavy alloyed room temperature, mechanical behavior under high temperature by isothermal forging; The room temperature tensile yield strength is 1000～1500MPa, and stretching plastic is greater than 5%; Yield strength 600 ℃～800 ℃ of high temperature is 400MPa～1450MPa, and plasticity is greater than 15%.
(2) a kind of titanium-nickel-aluminum-base high-temperature alloy material and the isothermal forging preparation method thereof of the present invention's proposition, the distortion titanium-nickel-aluminum-base high-temperature alloy material for preparing is compared with the titanium-nickel-aluminum-base high-temperature alloy with identical component, has better enduring quality, has more excellent enduring quality at 600 ℃～800 ℃, 600 ℃/550MPa lower creep rupture life is more than or equal to 250h, 700 ℃/300MPa lower creep rupture life is more than or equal to 150h, and 800 ℃/137MPa lower creep rupture life is more than or equal to 100h.
Description of drawings
Fig. 1: the Microstructures of As cast Alloys shape appearance figure of a kind of titanium-nickel-aluminum-base high-temperature alloy material that the present invention proposes;
Fig. 2: the cast alloy of a kind of titanium-nickel-aluminum-base high-temperature alloy material that the present invention proposes is through the figure of tissue topography of isothermal forging preparation;
Fig. 3: the isothermal forging preparation method's of a kind of titanium-nickel-aluminum-base high-temperature alloy material that the present invention proposes schema;
Ti among Fig. 4: the embodiment 1
42Ni
49Al
5Nb
2Ru
2Stretch test result graphic representation under 20 ℃, 650 ℃ and 800 ℃ of differing tempss.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
The present invention proposes a kind of titanium-nickel-aluminum-base high-temperature alloy material, and composition according to weight percent is: the niobium (Nb) of the nickel (Ni) of the titanium of 40at%～50at% (Ti), 45at%～55at%, the aluminium (Al) of 1at%～6at%, 1at%～5at% and the ruthenium (Ru) of 0.5at%～3at%.The content of ruthenium is preferably 1at%～2at%.The typical microtexture of this titanium-nickel-aluminum-base high-temperature alloy material as depicted in figs. 1 and 2.Fig. 1 is the tissue of cast alloy, and this titanium-nickel-aluminum-base high-temperature alloy material is by NiTi matrix, black Ti
2Ni phase and white Nb solid solution phase form, Ti
2Ni phase intercrystalline precipitation.Along with the increase of Ti content in the alloy, Ti
2The content of Ni phase increases.Fig. 2 is the organization chart after the isothermal forging, and this titanium-nickel-aluminum-base high-temperature alloy material is still by NiTi matrix, black Ti
2Ni phase and white Nb solid solution phase form, but the crystal grain of titanium-nickel-aluminum-base high-temperature alloy elongates along the vertical direction of forging after isothermal forging.
The isothermal forging preparation method of a kind of titanium-nickel-aluminum-base high-temperature alloy material that the present invention also proposes as shown in Figure 3, comprises the following steps:
(1) be that the titanium (Ti) of 40at%～50at%, the nickel (Ni) of 45at%～55at%, the aluminium (Al) of 1at%～6at%, the niobium (Nb) of 1at%～5at% and the ruthenium (Ru) of 0.5at%～3at% form by proportioning, the content sum of above-mentioned each composition is 100%, takes by weighing purity and be 99.9% titanium (Ti), purity and be 99.9% nickel (Ni), purity and be 99.9% aluminium (Al), purity and be 99.9% niobium (Nb) and purity and be 99.9% ruthenium (Ru);
(2) the above-mentioned titanium that takes by weighing, nickel, aluminium, niobium and ruthenium raw material are put into the magnetic levitation vacuum induction melting furnace, raw material is put according to the fusing point order, above high melting point component is placed on, below low-melting component is placed on, volatile component is evacuated to 2 * 10 in the middle of other raw materials
-3Pa～5 * 10
-3Pa is filled with high-purity argon gas to 1 * 10
4～3 * 10
4Then Pa is smelted into the titanium-nickel-aluminum-base high-temperature alloy ingot at 2700 ℃～3000 ℃;
(3) the above-mentioned titanium-nickel-aluminum-base high-temperature alloy ingot that makes is put into vacuum heat treatment furnace and heat-treat, in vacuum tightness 2 * 10
-3Pa～5 * 10
-3Pa, after thermal treatment temp is incubated 12～24 hours 850 ℃～1000 ℃ times, furnace cooling;
(4) with wire cutting method the titanium-nickel-aluminum-base high-temperature alloy ingot is made the cylinder ingot casting, aspect ratio is no more than 2, preferably is of a size of Φ 90mm * 150mm.The cylinder ingot casting is heated to 970～1000 ℃ in heat treatment furnace, insulation 2～2.5h carries out isothermal forging with cylinder ingot casting after the thermal treatment at four-column hydraulic press, in process furnace, preheat before the isothermal forging, then put into and forge and press distortion on the hydropress, forging temperature is 950～980 ℃, 1 * 10
-5～1 * 10
-4s
-1Strain rate carry out isothermal forging, deflection is 40%～60%.
The titanium-nickel-aluminum-base high-temperature alloy material that adopts aforesaid method to prepare is prepared as standard cylinder tension specimen, gauge length section diameter d=5mm, height h=25mm adopts MTS-880 type universal material experimental machine to carry out tensile pressures-strain testing, and tensile strain rate is 3 * 10
-4/ s, temperature range is 20 ℃, 600 ℃, 650 ℃ and 800 ℃ of temperature spots selected between 20 ℃～800 ℃, the tensile mechanical properties of titanium-nickel-aluminum-base high-temperature alloy material under condition of different temperatures that obtains after tested isothermal forging is as shown in table 1.The lasting sample of preparation standard, adopt the SANS beta alloy in 600 ℃/550MPa, 700 ℃/300MPa, creep rupture life during 800 ℃/137MPa, the high temperature endurance performance of titanium-nickel-aluminum-base high-temperature alloy material under condition of different temperatures that obtains after tested isothermal forging is as shown in table 2:
The tensile mechanical properties of table 1 titanium-nickel-aluminum-base high-temperature alloy
The high temperature endurance performance of table 2 titanium-nickel-aluminum-base high-temperature alloy
Adopt the titanium-nickel-aluminum-base high-temperature alloy material of isothermal forging method preparation of the present invention to have higher yield strength, better plasticity and enduring quality than the alloy material before forging, optimized the performance of titanium-nickel-aluminum-base high-temperature alloy material.This isothermal forging titanium-nickel-aluminum-base high-temperature alloy material is compared with the as cast condition titanium-nickel-aluminum-base high-temperature alloy with identical component, has excellent enduring quality, better yield strength and plasticity.
Embodiment 1:The composition that present embodiment proposes a kind of titanium-nickel-aluminum-base high-temperature alloy material is Ti
42Ni
49Al
5Nb
2Ru
2, the isothermal forging preparation method of this high temperature alloy comprises following step:
(1) taking by weighing 42at% purity is that 99.9% titanium, 49at% purity are that 99.9% nickel, 5at% purity are that 99.9% aluminium, 2at% purity are that 99.9% niobium and 2at% purity are 99.9% ruthenium;
(2) the above-mentioned titanium that takes by weighing, nickel, aluminium, niobium and ruthenium raw material are put into the magnetic levitation vacuum induction melting furnace, raw material is put according to the fusing point order, above high melting point component is placed on, below low-melting component is placed on, volatile component is evacuated to 2 * 10 in the middle of other raw materials
-3Pa is filled with high-purity argon gas to 1 * 10
5Then Pa is smelted into Ti at 2800 ℃
42Ni
49Al
5Nb
2Ru
2The superalloy ingot;
(3) with the above-mentioned Ti that makes
42Ni
49Al
5Nb
2Ru
2The superalloy ingot is put into vacuum heat treatment furnace and is heat-treated, in vacuum tightness 2 * 10
-3Pa, after thermal treatment temp is incubated 24 hours 1000 ℃ times, furnace cooling;
(4) with wire cutting method the titanium-nickel-aluminum-base high-temperature alloy ingot is made the cylinder ingot casting, be of a size of Φ 90mm * 150mm.The cylinder ingot casting is heated to 970 ℃ in heat treatment furnace, insulation 2h carries out isothermal forging with cylinder ingot casting after the thermal treatment at four-column hydraulic press, in process furnace, preheat before the isothermal forging, then put into and forge and press distortion on the hydropress, forging temperature is 950 ℃, 1 * 10
-5s
-1Strain rate carry out isothermal forging, deflection is 40%.
With the above-mentioned Ti that makes
42Ni
49Al
5Nb
2Ru
2High temperature alloy preparation standard tension specimen, gauge length section diameter d=5mm, height h=25mm adopts MTS-880 type universal material experimental machine to carry out compression pressure-strain testing, and compressive strain speed is 3 * 10
-4/ s as shown in Figure 4, records yield strength and deformation rate and is respectively 1100MPa and 10% under 20 ℃; Record yield strength and deformation rate under 650 ℃ and be respectively 850MPa and 20%.The lasting sample of preparation standard adopts SANS to record alloy and is not less than 200h in the creep rupture life of 700 ℃/350MPa, is not less than 100h the creep rupture life during 800 ℃/137MPa.Isothermal forging Ti of the present invention
42Ni
49Al
5Nb
2Ru
2High temperature alloy is compared with the cast alloy with identical component, has excellent enduring quality, higher yield strength and plasticity.
Embodiment 2:The composition that present embodiment proposes a kind of titanium-nickel-aluminum-base high-temperature alloy material is Ti
46Ni
45Al
1Nb
5Ru
3, the isothermal forging preparation method of this titanium-nickel-aluminum-base high-temperature alloy material comprises following step:
(1) taking by weighing 46at% purity is that 99.9% titanium, 45at% purity are that 99.9% nickel, 1at% purity are that 99.9% aluminium, 5at% purity are that 99.9% niobium and 3at% purity are 99.9% ruthenium;
(2) the above-mentioned titanium that takes by weighing, nickel, aluminium, niobium and ruthenium raw material are put into the magnetic levitation vacuum induction melting furnace, raw material is put according to the fusing point order, above high melting point component is placed on, below low-melting component is placed on, volatile component is evacuated to 5 * 10 in the middle of other raw materials
-3Pa is filled with high-purity argon gas to 3 * 10
4Then Pa is smelted into Ti at 2700 ℃
46Ni
45Al
1Nb
5Ru
3The superalloy ingot;
(3) with the above-mentioned Ti that makes
46Ni
45Al
1Nb
5Ru
3The superalloy ingot is put into vacuum heat treatment furnace and is heat-treated, in vacuum tightness 5 * 10
-3Pa, after thermal treatment temp is incubated 12 hours 850 ℃ times, furnace cooling;
(4) with wire cutting method the titanium-nickel-aluminum-base high-temperature alloy ingot is made the cylinder ingot casting, be of a size of Φ 90mm * 180mm.The cylinder ingot casting is heated to 100 ℃ in heat treatment furnace, insulation 2h carries out isothermal forging with cylinder ingot casting after the thermal treatment at four-column hydraulic press, in process furnace, preheat before the isothermal forging, then put into and forge and press distortion on the hydropress, forging temperature is 980 ℃, 1 * 10
-4s
-1Strain rate carry out isothermal forging, deflection is 60%.
Embodiment 3:The composition that present embodiment proposes a kind of titanium-nickel-aluminum-base high-temperature alloy material is Ti
50Ni
45Al
3Nb
1Ru
1, the isothermal forging preparation method of this titanium-nickel-aluminum-base high-temperature alloy material comprises following step:
(1) taking by weighing 50at% purity is that 99.9% titanium, 45at% purity are that 99.9% nickel, 3at% purity are that 99.9% aluminium, 1 at% purity are that 99.9% niobium and 1at% purity are 99.9% ruthenium;
(2) the above-mentioned titanium that takes by weighing, nickel, aluminium, niobium and ruthenium raw material are put into the magnetic levitation vacuum induction melting furnace, raw material is put according to the fusing point order, above high melting point component is placed on, below low-melting component is placed on, volatile component is evacuated to 3 * 10 in the middle of other raw materials
-3Pa is filled with high-purity argon gas to 2 * 10
4Then Pa is smelted into Ti at 3000 ℃
50Ni
45Al
3Nb
1Ru
1The superalloy ingot;
(3) with the above-mentioned Ti that makes
50Ni
45Al
3Nb
1Ru
1The superalloy ingot is put into vacuum heat treatment furnace and is heat-treated, in vacuum tightness 3 * 10
-3Pa, after thermal treatment temp is incubated 20 hours 900 ℃ times, furnace cooling;
(4) with wire cutting method with Ti
50Ni
45Al
3Nb
1Ru
1The superalloy ingot is made the cylinder ingot casting, is of a size of Φ 90mm * 100mm.The cylinder ingot casting is heated to 980 ℃ in heat treatment furnace, insulation 2.5h carries out isothermal forging with cylinder ingot casting after the thermal treatment at four-column hydraulic press, in process furnace, preheat before the isothermal forging, then put into and forge and press distortion on the hydropress, forging temperature is 970 ℃, 1 * 10
-4s
-1Strain rate carry out isothermal forging, deflection is 50%.
Embodiment 4:The composition that present embodiment proposes a kind of titanium-nickel-aluminum-base high-temperature alloy material is Ti
40Ni
55Al
1Nb
3Ru
1, the isothermal forging preparation method of this titanium-nickel-aluminum-base high-temperature alloy material high temperature alloy comprises following step:
(1) taking by weighing 40at% purity is that 99.9% titanium, 55at% purity are that 99.9% nickel, 1at% purity are that 99.9% aluminium, 3at% purity are that 99.9% niobium and 1at% purity are 99.9% ruthenium;
(2) the above-mentioned titanium that takes by weighing, nickel, aluminium, niobium and ruthenium raw material are put into the magnetic levitation vacuum induction melting furnace, raw material is put according to the fusing point order, above high melting point component is placed on, below low-melting component is placed on, volatile component is evacuated to 4 * 10 in the middle of other raw materials
-3Pa is filled with high-purity argon gas to 1 * 10
4Then Pa is smelted into Ti at 2900 ℃
40Ni
55Al
1Nb
3Ru
1The superalloy ingot;
(3) with the above-mentioned Ti that makes
40Ni
55Al
1Nb
3Ru
1The superalloy ingot is put into vacuum heat treatment furnace and is heat-treated, in vacuum tightness 4 * 10
-3Pa, after thermal treatment temp is incubated 18 hours 950 ℃ times, furnace cooling;
(4) with wire cutting method with Ti
40Ni
55Al
1Nb
3Ru
1The superalloy ingot is made the cylinder ingot casting, is of a size of Φ 70mm * 100mm.The cylinder ingot casting is heated to 990 ℃ in heat treatment furnace, insulation 2h carries out isothermal forging with cylinder ingot casting after the thermal treatment at four-column hydraulic press, in process furnace, preheat before the isothermal forging, then put into and forge and press distortion on the hydropress, forging temperature is 960 ℃, 1 * 10
-4s
-1Strain rate carry out isothermal forging, deflection is 55%.
Embodiment 5:
The composition that present embodiment proposes a kind of titanium-nickel-aluminum-base high-temperature alloy material is Ti
43Ni
46.5Al
6Nb
2Ru
2.5, the difference of its preparation process embodiment 1 only is step (1): take by weighing 43at% purity and be 99.9% titanium, 46.5at% purity and be 99.9% nickel, 6at% purity and be 99.9% aluminium, 2at% purity and be 99.9% niobium and 2.5at% purity and be 99.9% ruthenium; Other each steps and embodiment 1 are identical.
Embodiment 6:
The composition that present embodiment proposes a kind of titanium-nickel-aluminum-base high-temperature alloy material is Ti
41Ni
49Al
5Nb
2Ru
3, the difference of its preparation process embodiment 1 only is step (1): take by weighing 41at% purity and be 99.9% titanium, 49at% purity and be 99.9% nickel, 5at% purity and be 99.9% aluminium, 2at% purity and be 99.9% niobium and 3at% purity and be 99.9% ruthenium; Other each steps and embodiment 1 are identical.
Embodiment 7:
The composition that present embodiment proposes a kind of titanium-nickel-aluminum-base high-temperature alloy material is Ti
41Ni
50Al
5Nb
2Ru
2, the difference of its preparation process embodiment 1 only is step (1): take by weighing 41at% purity and be 99.9% titanium, 50at% purity and be 99.9% nickel, 5at% purity and be 99.9% aluminium, 2at% purity and be 99.9% niobium and 2at% purity and be 99.9% ruthenium; Other each steps and embodiment 1 are identical.
Embodiment 9:
The composition that present embodiment proposes a kind of titanium-nickel-aluminum-base high-temperature alloy material is Ti
42.5Ni
50Al
5Nb
2Ru
0.5, the difference of its preparation process embodiment 1 only is step (1): take by weighing 42.5at% purity and be 99.9% titanium, 50at% purity and be 99.9% nickel, 5at% purity and be 99.9% aluminium, 2at% purity and be 99.9% niobium and 0.5at% purity and be 99.9% ruthenium; Other each steps and embodiment 1 are identical.
Embodiment 10:
The composition that present embodiment proposes a kind of titanium-nickel-aluminum-base high-temperature alloy material is Ti
40.2Ni
50Al
5Nb
2Ru
2.8, the difference of its preparation process embodiment 1 only is step (1): take by weighing 40.2at% purity and be 99.9% titanium, 50at% purity and be 99.9% nickel, 5at% purity and be 99.9% aluminium, 2at% purity and be 99.9% niobium and 2.8at% purity and be 99.9% ruthenium; Other each steps and embodiment 1 are identical.
Embodiment 11:
The composition that present embodiment proposes a kind of titanium-nickel-aluminum-base high-temperature alloy material is Ti
42.2Ni
50Al
5Nb
2Ru
0.8, the difference of its preparation process embodiment 1 only is step (1): take by weighing 42.2at% purity and be 99.9% titanium, 50at% purity and be 99.9% nickel, 5at% purity and be 99.9% aluminium, 2at% purity and be 99.9% niobium and 0.8at% purity and be 99.9% ruthenium; Other each steps and embodiment 1 are identical.
Claims (5)
1. titanium-nickel-aluminum-base high-temperature alloy material, it is characterized in that: the composition of described titanium-nickel-aluminum-base high-temperature alloy material is the titanium of 40at%～50at%, the nickel of 45at%～55at%, the aluminium of 1at%～6at%, the niobium of 1at%～5at% and the ruthenium of 0.5at%～3at% according to weight percent; This titanium-nickel-aluminum-base high-temperature alloy material is by NiTi matrix, Ti
2Ni phase and Nb solid solution phase form;
Described titanium-nickel-aluminum-base high-temperature alloy material is 1000～1500MPa at 20 ℃ tensile yield strength, and stretching plastic is greater than 5%; Yield strength at 600 ℃～800 ℃ is 400MPa～1450MPa, and plasticity is greater than 15%;
Described titanium-nickel-aluminum-base high-temperature alloy material 600 ℃/550MPa lower creep rupture life more than or equal to 250h, 700 ℃/300MPa lower creep rupture life is more than or equal to 150h, 800 ℃/137MPa lower creep rupture life is more than or equal to 100h;
Described titanium-nickel-aluminum-base high-temperature alloy material prepares as follows:
(1) taking by weighing purity by the proportioning of titanium-nickel-aluminum-base high-temperature alloy material is that 99.9% titanium, purity are that 99.9% nickel, purity are that 99.9% aluminium, purity are that 99.9% niobium and purity are 99.9% ruthenium; The proportioning of titanium-nickel-aluminum-base high-temperature alloy material is: the ruthenium of the aluminium of the titanium of 40at%～50at%, the nickel of 45at%～55at%, 1at%～6at%, the niobium of 1at%～5at% and 0.5at%～3at% forms, and the content sum of each composition is 100%;
(2) the above-mentioned titanium that takes by weighing, nickel, aluminium, niobium and ruthenium raw material are put into the magnetic levitation vacuum induction melting furnace, be evacuated to 2 * 10
-3Pa～5 * 10
-3Pa is filled with high-purity argon gas to 1 * 10
4～3 * 10
4Pa is smelted into the titanium-nickel-aluminum-base high-temperature alloy ingot at 2700 ℃～3000 ℃;
(3) the titanium-nickel-aluminum-base high-temperature alloy ingot that makes is put into vacuum heat treatment furnace, in vacuum tightness 2 * 10
-3Pa～5 * 10
-3Pa, after thermal treatment temp is incubated 12～24 hours 850 ℃～1000 ℃ times, furnace cooling;
(4) with wire cutting method the titanium-nickel-aluminum-base high-temperature alloy ingot is made the cylinder ingot casting, aspect ratio is no more than 2, the cylinder ingot casting is preheated 970～1000 ℃ in heat treatment furnace, insulation 2～2.5h, then cylinder ingot casting after the thermal treatment is carried out isothermal forging at four-column hydraulic press, forging temperature is 950～980 ℃, 1 * 10
-5～1 * 10
-4s
-1Strain rate carry out isothermal forging, deflection is 40%～60%, obtains the titanium-nickel-aluminum-base high-temperature alloy material of isothermal forging method preparation.
2. a kind of titanium-nickel-aluminum-base high-temperature alloy material according to claim 1, it is characterized in that: the content of described ruthenium is 1at%～2at%.
3. a kind of titanium-nickel-aluminum-base high-temperature alloy material according to claim 1, it is characterized in that: described titanium-nickel-aluminum-base high-temperature alloy material is Ti
42Ni
49Al
5Nb
2Ru
2, Ti
46Ni
45Al
1Nb
5Ru
3, Ti
50Ni
45Al
3Nb
1Ru
1, Ti
40Ni
55Al
1Nb
3Ru
1, Ti
43Ni
46.5Al
6Nb
2Ru
2.5Or Ti
41Ni
49Al
5Nb
2Ru
3
4. the isothermal forging preparation method of a titanium-nickel-aluminum-base high-temperature alloy material is characterized in that: comprise the following steps:
(1) taking by weighing purity by the proportioning of titanium-nickel-aluminum-base high-temperature alloy material is that 99.9% titanium, purity are that 99.9% nickel, purity are that 99.9% aluminium, purity are that 99.9% niobium and purity are 99.9% ruthenium; The proportioning of titanium-nickel-aluminum-base high-temperature alloy material is: the ruthenium of the aluminium of the titanium of 40at%～50at%, the nickel of 45at%～55at%, 1at%～6at%, the niobium of 1at%～5at% and 0.5at%～3at% forms, and the content sum of each composition is 100%;
(2) the above-mentioned titanium that takes by weighing, nickel, aluminium, niobium and ruthenium raw material are put into the magnetic levitation vacuum induction melting furnace, be evacuated to 2 * 10
-3Pa～5 * 10
-3Pa is filled with high-purity argon gas to 1 * 10
4～3 * 10
4Pa is smelted into the titanium-nickel-aluminum-base high-temperature alloy ingot at 2700 ℃～3000 ℃;
(3) the titanium-nickel-aluminum-base high-temperature alloy ingot that makes is put into vacuum heat treatment furnace, in vacuum tightness 2 * 10
-3Pa～5 * 10
-3Pa, after thermal treatment temp is incubated 12～24 hours 850 ℃～1000 ℃ times, furnace cooling;
(4) with wire cutting method the titanium-nickel-aluminum-base high-temperature alloy ingot is made the cylinder ingot casting, aspect ratio is no more than 2, the cylinder ingot casting is preheated 970～1000 ℃ in heat treatment furnace, insulation 2～2.5h, then cylinder ingot casting after the thermal treatment is carried out isothermal forging at four-column hydraulic press, forging temperature is 950～980 ℃, 1 * 10
-5～1 * 10
-4s
-1Strain rate carry out isothermal forging, deflection is 40%～60%, obtains the titanium-nickel-aluminum-base high-temperature alloy material of isothermal forging method preparation.
5. the isothermal forging preparation method of a kind of titanium-nickel-aluminum-base high-temperature alloy material according to claim 4 is characterized in that: the cylinder ingot casting is of a size of Φ 90mm * 150mm in the described step (4).
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| CN102392171A (en) * | 2011-11-30 | 2012-03-28 | 哈尔滨工业大学 | High-Nb TiAl alloy with good hot-working performance and preparation method thereof |
| CN102776415B (en) * | 2012-08-17 | 2014-04-02 | 北京科技大学 | Method for preparing high-tensile-ductility Ni (Bi) alloy |
| CN107234196B (en) * | 2017-05-26 | 2018-11-13 | 西安赛特思迈钛业有限公司 | A kind of equal atomic ratios Ti-Ni alloy large-scale casting ingot forging method |
| CN109022935A (en) * | 2018-09-12 | 2018-12-18 | 张家港市五湖新材料技术开发有限公司 | A kind of preparation method of aluminium nickel-titanium alloy material |
| CN112045295A (en) * | 2019-06-06 | 2020-12-08 | 天津大学 | Ultrasonic welding method for NiTi shape memory alloy and Al interlayer |
| CN110802189B (en) * | 2019-11-12 | 2021-06-01 | 中航上大高温合金材料有限公司 | Forging process for high-temperature alloy plate blank difficult to deform |
| CN116351994B (en) * | 2023-05-25 | 2023-12-19 | 北京中辰至刚科技有限公司 | Isothermal forging method of refractory high-entropy alloy product and processed product thereof |
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| CN101139675A (en) * | 2007-09-30 | 2008-03-12 | 北京航空航天大学 | Titanium nickel aluminium niobium hafnium high-temperature alloy material |
| CN101532400A (en) * | 2008-02-27 | 2009-09-16 | 通用电气公司 | High-temperature shape memory alloy actuator |
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| CN101139675A (en) * | 2007-09-30 | 2008-03-12 | 北京航空航天大学 | Titanium nickel aluminium niobium hafnium high-temperature alloy material |
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