A platinum-rhenium-based high-temperature alloy material and a preparation method thereof

Abstract

The invention discloses a platinum-rhenium-based high-temperature alloy material and a preparation method thereof. The raw materials include, by weight percentage, Pt, Re, metal elements and rare earth elements, as well as inevitable impurities, wherein the metal elements include one or more of W, Ta, Nb, Ir, Rh, Ni, Al, Zr and Ti, and the rare earth elements include one or more of Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu. The invention adopts smelting casting, forging, rolling, cold drawing and heat treatment to prepare the platinum-rhenium alloy wire. The material has low cost and good processing performance, has good arc erosion resistance and high-temperature durable ablation performance, can replace part of platinum-based high-temperature alloy functional materials, and has good industrial application prospects.

Description

Technical Field

[0001] The invention relates to a high-temperature alloy material, in particular to a platinum-rhenium-based high-temperature alloy material and a preparation method thereof. The alloy has good arc erosion resistance and high-temperature durable ablation performance. Background Art

[0002] In modern industry and high-tech fields, high temperature and corrosion resistant functional materials have important applications. Although low melting point metal materials such as iron-based, nickel-based, titanium-based, cobalt-based, molybdenum-based alloys and their intermetallic compounds have been greatly developed and widely used, no low melting point metal can withstand the fierce and complex environmental tests such as high temperature, high pressure, strong electrical corrosion and chemical corrosion like platinum alloys.

[0003] Platinum has a high melting point and stable chemical properties, making it an ideal high-temperature material, but its high-temperature strength is relatively low. In order to improve the high-temperature performance of platinum, alloying treatment is required. At present, platinum is mainly alloyed with high-melting-point platinum group metal elements such as iridium and rhodium to improve the high-temperature strength, high-temperature corrosion resistance and arc erosion resistance of platinum alloys. Platinum-iridium alloy and platinum-rhodium alloy have the advantages of high melting point, good high-temperature corrosion resistance and strong arc erosion resistance. They are widely used in thermocouples, ignition electrodes, etc., especially as spark plug electrode materials for automobiles, which can improve the engine's ignition performance, fuel economy, service life and reduce the emission of harmful substances.

[0004] At present, most high-temperature alloy functional materials use expensive platinum-iridium alloys and platinum-rhodium alloys. The prices of iridium and rhodium were 1.35 million yuan / kg and 4.75 million yuan / kg respectively in July 2021. In order to expand the application of platinum-based high-temperature metal materials and reduce costs, it is urgent to develop more economical high-temperature alloy materials.

[0005] Rhenium has a melting point of 3180°C, which is much higher than platinum. Rhenium is very stable at high temperatures, has low vapor pressure, is wear-resistant, and can resist arc corrosion. Adding rhenium to the alloy will increase the creep strength of the high-temperature alloy. Nickel-rhenium high-temperature alloys can be used to manufacture combustion chambers, turbine blades, and exhaust nozzles for jet engines. These alloys contain up to 6% rhenium, which is currently the largest practical application of rhenium.

[0006] The application of platinum-rhenium alloy for high-temperature functional materials has not been reported in domestic patents and literature. Foreign patent PL164124B1 introduces that platinum-rhenium alloy can be used to produce tools or parts that withstand high temperatures. It compares the performance of two platinum-rhenium alloys, PtRe1 and PtRe5, with PtRh10 and Pt. The high-temperature resistance of PtRe1 alloy containing only 1wt% Re is equivalent to that of PtRh10. However, this patent only considers the case of Re≤5%, and does not conduct in-depth research on the case of Re>5% and the case of adding rare earth elements and other metal elements to improve performance.

[0007] At present, the application of platinum-rhenium alloy is mainly used in the field of petrochemical industry as platinum-rhenium reforming catalyst, which can improve the octane number of naphtha in the oil processing process. CN109954505A discloses a method for preparing a reduced platinum-rhenium reforming catalyst. Summary of the invention

[0008] One purpose of the present invention is to provide a platinum-rhenium-based high-temperature alloy material with good processing performance and low cost; the second purpose of the present invention is to provide a method for preparing platinum-rhenium alloy wire for electrode material.

[0009] The present invention provides the following technical solutions:

[0010] A platinum-rhenium-based high-temperature alloy material comprises the following components by mass percentage: Re: 5.00-50.00wt%, Pt: 33.5-95.00wt%, metal elements 0.01-20.00wt%, and rare earth elements 0.01-1.50wt%.

[0011] As a further solution of the present invention, the platinum-rhenium-based high-temperature alloy material includes the following components in mass percentage: Re: 20.00wt%, Pt: 69.5wt%, metal elements 10.00wt%, and rare earth elements 0.50wt%.

[0012] As a further embodiment of the present invention, the metal element includes one or more of W, Ta, Nb, Ir, Rh, Ni, Al, Zr, and Ti; the rare earth element is one or more of Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu.

[0013] The preparation method of the platinum-rhenium-based high-temperature alloy material comprises the following specific steps:

[0014] (1) Melting and casting: weigh the raw materials of the above components by weight percentage, perform induction melting in a vacuum environment to obtain a platinum-rhenium alloy liquid, and cast it to obtain a platinum-rhenium alloy ingot after homogenization; the vacuum degree of melting is ≤0.1MPa, and the casting temperature is 2000-2800°C; preferably, cooling in a water-cooled copper crucible can make the alloy ingot structure uniform and avoid segregation;

[0015] (2) Forging: heating the platinum-rhenium alloy ingot to 900-1600° C., and performing high-temperature forging in the extension direction with a deformation rate of 30-75% to obtain a platinum-rhenium alloy forging with a uniform structure; or heating the platinum-rhenium alloy ingot to 900-1600° C., annealing for 1-2 hours, cooling, and performing forging in the extension direction with a deformation rate of 30-75% to obtain a platinum-rhenium alloy forging with a uniform structure;

[0016] (3) rolling: heating the platinum-rhenium alloy forging to 900-1600° C. and rolling the forging using a grooved rolling mill to obtain a wire rod; or heating the forging to 900-1600° C. and annealing for 1-2 hours, and rolling the forging using a grooved rolling mill to obtain a wire rod; in this step, the reduction of each rolling pass is 3-30% and the rolling speed is 1-10 m / s;

[0017] (4) Wire drawing: heating the wire rod to 700-1400°C and forming the wire through multiple high-temperature drawing processes; or heating the wire rod to 700-1400°C and annealing for 1-2 hours, and then forming the wire through multiple cold drawing processes; the reduction amount of each drawing process is 3%-15%; preferably, the use of a water-based lubricant in the cold drawing process can meet the lubrication requirements and is more conducive to environmental protection;

[0018] (5) Heat treatment: annealing the filaments at 700-1200°C for 4-6 hours in a vacuum environment; preferably, the heat treatment is performed by intermittent gradual heating, and the heat treatment process is to heat the filaments from room temperature to 300-500°C and keep them warm for 10-120 minutes; then continue to heat the filaments to 700-950°C and keep them warm for 0.5-1 hour; finally continue to heat the filaments to 950-1200°C and anneal and keep them warm for 3-5 hours.

[0019] The key technologies of the present invention are component ratio and process design. The use of Re20wt% can increase the melting point of the platinum-rhenium-based alloy material to above 2000°C, and the addition of rare earth elements improves the high-temperature endurance strength of the alloy; due to the difference in rhenium content and the different addition amounts of rare earth elements and high-temperature metal elements, the alloy properties are different, and cold processing or high-temperature processing can be flexibly adopted; the heat treatment process adjusts and stabilizes the material properties.

[0020] Beneficial effects: Compared with existing high-temperature materials, the present invention uses rhenium to replace part or all of iridium and rhodium, which not only greatly reduces the material cost, but also improves the melting point of the material. At the same time, it has good processing performance and low cost, and has good resistance to arc erosion and high-temperature durable ablation performance. It can be applied to electrical contact points in the aviation industry, electrodes for industrial electroplating, thermocouples, automotive spark plug electrode materials, gas turbine ignition electrode materials and other fields. The use of high-temperature electrode materials can significantly increase their service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a graphical representation of the results of high-energy ignition endurance tests on the platinum-rhenium alloy wire prepared in Example 1, platinum-ruthenium alloy, and platinum-iridium alloy. DETAILED DESCRIPTION

[0022] The present invention is described in detail below with reference to examples.

[0023] Example 1

[0024] See also Figure 1 In an embodiment of the present invention, a platinum-rhenium-based high-temperature alloy material comprises, by weight percentage, the following raw materials:

[0025] Pt: 80wt%, Re: 20wt%.

[0026] The preparation method of the platinum-rhenium-based high-temperature alloy material comprises the following specific steps:

[0027] (1) Melting and casting: Weigh the raw materials of the above components according to weight percentage, perform induction melting in a vacuum environment to obtain platinum-rhenium alloy liquid, homogenize it and cast it to obtain Platinum-rhenium alloy ingot; the vacuum degree of melting is ≤0.1MPa, and the casting temperature is 2200℃;

[0028] (2) Forging: The platinum-rhenium alloy ingot is heated to 1600°C and subjected to high-temperature forging in the elongation direction with a deformation rate of 58% to obtain a platinum-rhenium alloy forging with uniform structure;

[0029] (3) Rolling: After heating the platinum-rhenium alloy forging to 1400° C. and annealing for 1.5 hours, rolling is performed using a groove rolling mill to obtain a wire rod; in this step, the reduction of each rolling pass is 10-30%, and the rolling speed is 1.5 m / s;

[0030] (4) Wire drawing: After heating the wire rod to 1000℃ and annealing for 2 hours, it is made by multiple cold drawing processes. For fine wires, the drawing process uses a water-based lubricant and the reduction per pass is 5%-15%;

[0031] (5) Heat treatment: directly anneal the filaments at 800°C for 4 hours under vacuum degree ≤ 0.5 MPa.

[0032] Performance test: Under the process conditions of this embodiment, the physical properties of the obtained platinum-rhenium alloy are: resistivity is 85.5μΩ·cm, hardness is 398Hv, tensile strength is 1350MPa, and elongation is 0.8% before heat treatment; hardness is 513Hv, tensile strength is 1670MPa, and elongation is 0.5% after heat treatment; it is subjected to high-energy ignition durability test with platinum-ruthenium alloy and platinum-iridium alloy, and the results are as follows: Figure 1 As shown, the test conclusion is: the experimental platinum-rhenium alloy spark plug shows good anti-corrosion performance, which is similar to the corrosion resistance of platinum-ruthenium alloy spark plug and slightly better than platinum-iridium alloy spark plug.

[0033] Example 2

[0034] In an embodiment of the present invention, a platinum-rhenium-based high-temperature alloy material comprises, in terms of weight percentage, the following raw materials:

[0035] Pt: 65wt%, Re: 35wt%.

[0036] The preparation method of the platinum-rhenium-based high-temperature alloy material comprises the following specific steps:

[0037] (1) Melting and casting: Weigh the raw materials of the above components according to weight percentage, perform induction melting in a vacuum environment to obtain platinum-rhenium alloy liquid, homogenize it and cast it to obtain Platinum-rhenium alloy ingot; the smelting vacuum degree is ≤0.1MPa, and the casting temperature is 2400℃;

[0038] (2) Forging: The platinum-rhenium alloy ingot is heated to 1700°C and subjected to high-temperature forging in the elongation direction with a deformation rate of 58% to obtain a platinum-rhenium alloy forging with uniform structure;

[0039] (3) rolling: heating the platinum-rhenium alloy forging to 1400° C. and rolling the forging using a groove rolling mill to obtain a wire rod; the reduction of each rolling pass in this step is 10-30% and the rolling speed is 1.5 m / s;

[0040] (4) Wire drawing: The wire rod is heated to 1100°C and annealed for 2 hours, and then drawn through multiple drawing processes. For fine wires, the drawing process uses a water-based lubricant and the reduction per pass is 5%-15%;

[0041] (5) Heat treatment: directly anneal the filaments at 800°C for 4 hours under vacuum degree ≤ 0.5 MPa.

[0042] Performance test: Under the process conditions of this embodiment, the physical properties of the obtained platinum-rhenium alloy are as follows: resistivity is 113 μΩ·cm, hardness is 457 Hv, tensile strength is 1480 MPa, and elongation is 0.9% before heat treatment; hardness is 535 Hv, tensile strength is 1740 MPa, and elongation is 0.4% after heat treatment.

[0043] Example 3

[0044] In an embodiment of the present invention, a platinum-rhenium-based high-temperature alloy material comprises, in terms of weight percentage, the following raw materials:

[0045] Pt: 90wt%, Re: 6.7wt%, W: 3wt%, Y: 0.3wt%.

[0046] The preparation method of the platinum-rhenium-based high-temperature alloy material comprises the following specific steps:

[0047] (1) Melting and casting: Weigh the raw materials of the above components according to weight percentage, perform induction melting in a vacuum environment to obtain platinum-rhenium alloy liquid, homogenize it and cast it to obtain Platinum-rhenium alloy ingot; the smelting vacuum degree is ≤0.1MPa, and the casting temperature is 2000℃;

[0048] (2) Forging: The platinum-rhenium alloy ingot is heated to 1400°C and subjected to high-temperature forging in the elongation direction with a deformation rate of 58% to obtain a platinum-rhenium alloy forging with uniform structure;

[0049] (3) rolling: heating the platinum-rhenium alloy forging to 1150° C. and using a groove rolling mill to perform high temperature rolling to obtain a wire rod; in this step, the reduction of each rolling pass is 10-30% and the rolling speed is 1.5 m / s;

[0050] (4) Wire drawing: The wire rod is heated to 950°C and drawn through multiple high-temperature drawing processes. For fine wire, the reduction per pass is 5%-10%;

[0051] (5) Heat treatment: anneal the filaments at 1000°C for 2 hours under vacuum degree ≤ 0.5 MPa.

[0052] Performance test: Under the process conditions of this embodiment, the physical properties of the obtained platinum-rhenium-based alloy are as follows: resistivity is 57 μΩ·cm, hardness is 372 Hv, tensile strength is 1200 MPa, and elongation is 0.8% before heat treatment; hardness is 283 Hv, tensile strength is 950 MPa, and elongation is 12.9% after heat treatment.

[0053] Example 4

[0054] In an embodiment of the present invention, a platinum-rhenium-based high-temperature alloy material comprises, in terms of weight percentage, the following raw materials:

[0055] Pt: 90wt%, Re: 7.6wt%, Ni: 2.4wt%.

[0056] The preparation method of the platinum-rhenium-based high-temperature alloy material comprises the following specific steps:

[0057] (1) Melting and casting: Weigh the raw materials of the above components according to weight percentage, perform induction melting in a vacuum environment to obtain platinum-rhenium alloy liquid, homogenize it and cast it to obtain Platinum-rhenium alloy ingot; the smelting vacuum degree is ≤0.1MPa, and the casting temperature is 2000℃;

[0058] (2) Forging: The platinum-rhenium alloy ingot is heated to 1400°C and subjected to high-temperature forging in the elongation direction with a deformation rate of 58% to obtain a platinum-rhenium alloy forging with uniform structure;

[0059] (3) rolling: heating the platinum-rhenium alloy forging to 1150° C. and using a groove rolling mill to perform high temperature rolling to obtain a wire rod; in this step, the reduction of each rolling pass is 10-30% and the rolling speed is 1.5 m / s;

[0060] (4) Wire drawing: After heating the wire rod to 950℃ and annealing for 2 hours, it is made by multiple cold drawing processes. For fine wire, the reduction per pass is 5%-10%;

[0061] Performance test: Under the process conditions of this embodiment, the physical properties of the obtained platinum-rhenium-based alloy are: resistivity is 62μΩ·cm, hardness before heat treatment is 329Hv, tensile strength is 1060MPa, and elongation is 1.2%.

[0062] Example 5

[0063] In an embodiment of the present invention, a platinum-rhenium-based high-temperature alloy material comprises, in terms of weight percentage, the following raw materials:

[0064] Pt: 89.5wt%, Re: 7.6wt%, Ni: 2.4wt%, Y: 0.5wt%.

[0065] The preparation method of the platinum-rhenium-based high-temperature alloy material comprises the following specific steps:

[0066] (1) Melting and casting: Weigh the raw materials of the above components according to weight percentage, perform induction melting in a vacuum environment to obtain platinum-rhenium alloy liquid, homogenize it and cast it to obtain Platinum-rhenium alloy ingot; the vacuum degree of melting is ≤0.1MPa, and the casting temperature is 2300℃;

[0067] (2) Forging: The platinum-rhenium alloy ingot is heated to 1400°C and subjected to high-temperature forging in the elongation direction with a deformation rate of 58% to obtain a platinum-rhenium alloy forging with uniform structure;

[0068] (3) rolling: heating the platinum-rhenium alloy forging to 1200° C. and using a groove rolling mill to perform high temperature rolling to obtain a wire rod; in this step, the reduction of each rolling pass is 10-30% and the rolling speed is 1.5 m / s;

[0069] (4) Wire drawing: The wire rod is heated to 9500℃ and drawn through multiple high-temperature drawing processes. For fine wire, the reduction per pass is 5%-10%;

[0070] Performance test: Under the process conditions of this embodiment, the physical properties of the obtained platinum-rhenium-based alloy are: resistivity is 146 μΩ·cm, hardness before heat treatment is 352 Hv, tensile strength is 1150 MPa, and elongation is 0.6%.

[0071] Example 6

[0072] In an embodiment of the present invention, a platinum-rhenium-based high-temperature alloy material comprises, in terms of weight percentage, the following raw materials:

[0073] Pt: 74.5wt%, Re: 10wt%, W: 7.6wt%, Ni: 2.4wt%, Y: 0.5wt%.

[0074] The preparation method of the platinum-rhenium-based high-temperature alloy material comprises the following specific steps:

[0075] (1) Melting and casting: Weigh the raw materials of the above components according to weight percentage, perform induction melting in a vacuum environment to obtain platinum-rhenium alloy liquid, homogenize it and cast it to obtain Platinum-rhenium alloy ingot; the smelting vacuum degree is ≤0.1MPa, and the casting temperature is 2150℃;

[0076] (2) Forging: The platinum-rhenium alloy ingot is heated to 1850°C and subjected to high temperature forging in the elongation direction with a deformation rate of 58% to obtain a platinum-rhenium alloy forging with uniform structure;

[0077] (3) rolling: heating the platinum-rhenium alloy forging to 1500° C. and using a groove rolling mill to perform high temperature rolling to obtain a wire rod; in this step, the reduction of each rolling pass is 10-30% and the rolling speed is 1.5 m / s;

[0078] (4) Wire drawing: The wire rod is heated to 1200°C and drawn through multiple high-temperature drawing processes. For fine wire, the reduction per pass is 5%-10%;

[0079] (5) Heat treatment: anneal the filaments at 1000°C for 2 hours under vacuum degree ≤ 0.5 MPa.

[0080] Performance test: Under the process conditions of this embodiment, the physical properties of the obtained platinum-rhenium-based alloy are as follows: resistivity is 146 μΩ·cm, hardness is 392 Hv, tensile strength is 1250 MPa, and elongation is 1% before heat treatment; hardness is 346 Hv, tensile strength is 1110 MPa, and elongation is 2.3% after heat treatment.

[0081] Example 7

[0082] In an embodiment of the present invention, a platinum-rhenium-based high-temperature alloy material comprises, in terms of weight percentage, the following raw materials:

[0083] Pt: 64.5wt%, Re: 20wt%, W: 7.6wt%, Ni: 2.4wt%, Y: 0.5wt%.

[0084] The preparation method of the platinum-rhenium-based high-temperature alloy material comprises the following specific steps:

[0085] (1) Melting and casting: Weigh the raw materials of the above components according to weight percentage, perform induction melting in a vacuum environment to obtain platinum-rhenium alloy liquid, homogenize it and cast it to obtain Platinum-rhenium alloy ingot; the vacuum degree of melting is ≤0.1MPa, and the casting temperature is 2300℃;

[0086] (2) Forging: The platinum-rhenium alloy ingot is heated to 1750°C and subjected to high-temperature forging in the elongation direction with a deformation rate of 58% to obtain a platinum-rhenium alloy forging with uniform structure;

[0087] (3) rolling: heating the platinum-rhenium alloy forging to 1450° C. and using a groove rolling mill to perform high temperature rolling to obtain a wire rod; in this step, the reduction of each rolling pass is 10-30% and the rolling speed is 1.5 m / s;

[0088] (4) Wire drawing: The wire rod is heated to 1200°C and drawn through multiple high-temperature drawing processes. For fine wire, the reduction per pass is 5%-10%;

[0089] (5) Heat treatment: anneal the filaments at 1000°C for 2 hours under vacuum degree ≤ 0.5 MPa.

[0090] Performance test: Under the process conditions of this embodiment, the physical properties of the obtained platinum-rhenium-based alloy are as follows: resistivity is 146 μΩ·cm, hardness before heat treatment is 428 Hv, tensile strength is 1390 MPa, and elongation is 0.8%, and hardness after heat treatment is 365 Hv, tensile strength is 1180 MPa, and elongation is 2.3%.

Claims

1. A platinum-rhenium-based high-temperature alloy material having good high-voltage electrical corrosion resistance and high-temperature durable ablation performance, characterized in that: The following components are included in percentage by mass Composition: Re: 20.00~50.00wt%, Pt: 33.5~95.00wt%, metal elements 0.01~10.00wt%, rare earth elements 0.01~1.50wt%; The metal element is one or more of W, Ta, Nb, Ni, Al, Zr and Ti; The rare earth element is one or more of Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu; The method for preparing the platinum-rhenium-based high-temperature alloy material comprises the following steps: (1) Melting and casting: weighing the raw materials of the above components according to weight percentage, melting them in a vacuum environment to obtain platinum-rhenium alloy liquid, and casting them after homogenization to obtain platinum-rhenium alloy ingots; (2) Forging: heating the platinum-rhenium alloy ingot to 900-1600°C and performing high temperature forging to obtain a platinum-rhenium alloy forging; or heating the platinum-rhenium alloy ingot to 900-1600°C and annealing for 1-2 hours and then cold forging to obtain a platinum-rhenium alloy forging; (3) rolling: heating the platinum-rhenium alloy forging to 900-1600° C. and performing high temperature rolling to obtain a wire rod; or heating the platinum-rhenium alloy forging to 900-1600° C. and annealing for 1-2 hours and then rolling to obtain a wire rod; (4) Wire drawing: heating the wire rod to 700-1400°C and forming the wire through multiple high-temperature drawing processes; or heating the wire rod to 700-1400°C and annealing for 1-2 hours, and then forming the wire through multiple cold drawing processes; the reduction amount of each drawing process is 3%-15%; (5) Heat treatment: annealing the filaments at 700-1200° C. for 4-6 hours in a vacuum environment.

2. The method for preparing a platinum-rhenium-based high-temperature alloy material according to claim 1, characterized in that: The following steps are included: (1) Melting and casting: weighing the raw materials of the above components according to weight percentage, melting them in a vacuum environment to obtain platinum-rhenium alloy liquid, and casting them after homogenization to obtain platinum-rhenium alloy ingots; (2) Forging: heating the platinum-rhenium alloy ingot to 900-1600°C and performing high temperature forging to obtain a platinum-rhenium alloy forging; or heating the platinum-rhenium alloy ingot to 900-1600°C and annealing for 1-2 hours and then cold forging to obtain a platinum-rhenium alloy forging; (3) rolling: heating the platinum-rhenium alloy forging to 900-1600° C. and performing high temperature rolling to obtain a wire rod; or heating the platinum-rhenium alloy forging to 900-1600° C. and annealing for 1-2 hours and then rolling to obtain a wire rod; (4) Wire drawing: heating the wire rod to 700-1400°C and forming the wire through multiple high-temperature drawing processes; or heating the wire rod to 700-1400°C and annealing for 1-2 hours, and then forming the wire through multiple cold drawing processes; the reduction amount of each drawing process is 3%-15%; (5) Heat treatment: annealing the filaments at 700-1200° C. for 4-6 hours in a vacuum environment.

3. The method for preparing a platinum-rhenium-based high-temperature alloy material according to claim 2, characterized in that: The vacuum degree of smelting in the step (1) is ≤0.1 MPa, and the casting temperature is 2000-2800°C.

4. The method for preparing a platinum-rhenium-based high-temperature alloy material according to claim 2, characterized in that: In the step (3), the reduction in each rolling pass is 3-30%, and the rolling speed is 1-10 m / s.

5. The method for preparing a platinum-rhenium-based high-temperature alloy material according to claim 2, characterized in that: The step (5) is to intermittently and gradually heat the filaments, wherein the heat treatment process is to heat the filaments from room temperature to 300-500°C and keep them warm for 10-120 minutes; then continue to heat the filaments to 700-950°C and keep them warm for 0.5-1 hour; finally continue to heat the filaments to 950-1200°C and anneal and keep them warm for 3-5 hours.

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