Manufacturing process method of high-temperature alloy welding wire

Abstract

The invention provides a manufacturing process method of a high-temperature alloy welding wire. A manufacturing process method of a high-temperature alloy welding wire comprises the following steps of S1, raw material pretreatment and burdening, S2, vacuum induction melting-inert gas shielding pouring, S3, homogenization heat treatment and primary forging, S4, continuous hot rolling-online solution treatment, S5, differential forming treatment and S6, finished product aftertreatment. According to the manufacturing process method of the high-temperature alloy welding wire, vacuum induction melting and inert gas shielding pouring are integrated, and oxide inclusions in the melting process are reduced; the production process is simple, the production process is short, the energy consumption is low, the cost is controllable, meanwhile, it is guaranteed that the welding wire is uniform in component and compact in structure, has excellent high-temperature mechanical performance and hot corrosion resistance, can be adapted to preparation of high-temperature alloy welding wires of different plasticity grades, and particularly can meet the production requirement of fine welding wires needed by precise welding.

Description

Technical Field

[0001] This invention relates to the field of welding material manufacturing technology, and in particular to a manufacturing process for a high-temperature alloy welding wire. Background Technology

[0002] High-temperature alloy welding wire is a core material for welding and repairing components in high-temperature environments, and its performance directly determines the reliability and service life of the welded joint.

[0003] In the manufacturing and maintenance of key components such as high-pressure turbine blades in aerospace and superheaters and reheaters in ultra-supercritical power plants, stringent requirements are placed on the compositional uniformity, microstructure density, high-temperature creep strength, and resistance to hot corrosion of high-temperature alloy welding wires.

[0004] The existing manufacturing processes for high-temperature alloy welding wires have the following shortcomings: First, traditional processes often employ a long process of vacuum melting, multi-pass forging, hot rolling, and cold drawing. The intermediate heat treatment steps are cumbersome, resulting in long production cycles, high energy consumption, and a tendency to cause defects such as uneven microstructure and residual stress accumulation within the welding wire, affecting welding performance. Second, for low-plasticity high-temperature alloy welding wires, conventional drawing processes are insufficient to produce fine welding wires with a diameter less than 1.2 mm, while horizontal continuous casting processes can only produce products with a diameter greater than 2 mm, failing to meet the needs of precision welding scenarios. Furthermore, importing related fine welding wires is costly and time-consuming. Third, welding wires produced by existing processes still have room for improvement in terms of high-temperature creep life and resistance to hot corrosion, making it difficult to fully meet the long-term service requirements of extreme environments such as ultra-supercritical power plants above 700℃.

[0005] Therefore, it is necessary to provide a manufacturing process for high-temperature alloy welding wire to solve the above-mentioned technical problems. Summary of the Invention

[0006] This invention provides a manufacturing process for high-temperature alloy welding wire, which solves the problems of cumbersome and complex processes, high production costs, and difficulty in preparing high-temperature alloy welding wires with different plasticity grades.

[0007] To solve the above-mentioned technical problems, the present invention provides a manufacturing process method for high-temperature alloy welding wire, comprising the following steps: S1: raw material pretreatment and batching, S2: vacuum induction melting-inert gas protective casting, S3: homogenization heat treatment and one-time forging, S4: continuous hot rolling-online solution treatment, S5: differentiated forming treatment and S6: finished product post-treatment; S1: Raw material pretreatment and batching includes the following steps: S11: Select metal raw materials and trace element additives with a purity of 99.9% and accurately batch them according to the chemical composition of the target welding wire; S12: Clean the surface of the raw materials of oil, oxide scale and impurities; S2: Vacuum induction melting-inert gas protected casting includes the following steps: S21: Put the raw material into a vacuum induction furnace, evacuate to a vacuum degree of 1.0 Pa, heat to 1420-1480℃ to melt and hold for 10-15 min, then heat to 1520-1580℃ and refine with electromagnetic stirring for 20-30 min; S22: Then, under argon protection, pour into a mold preheated at 400-600℃ to obtain an alloy ingot; The S3: homogenization heat treatment and one-time forging includes the following steps: holding the alloy ingot at 1230-1260℃ for 2-3 hours, and then forging it into a billet with a diameter of 30-50mm at 1180-1220℃, with a forging deformation of 50-60%; S4: Continuous hot rolling-online solution treatment includes the following steps: S41: Heat the forging billet to 1150-1190℃ and hold for 1-1.5h, then continuously hot roll it into wire rod with a diameter of 5.0-8.0mm, with the final hot rolling temperature not lower than 950℃; S42: Subsequently perform online solution treatment at a solution temperature of 1080-1120℃, hold for 30-40min, and then rapidly air cool. The S5: Differentiated forming process includes the following steps: S51: Select the forming process according to the plasticity grade of the high-temperature alloy. For high-temperature alloys with good plasticity, pickling + multi-pass cold drawing + intermediate annealing process is adopted; S52: For high-temperature alloys with low plasticity, powder preparation + cladding filling + vacuum degassing + hot isostatic pressing sintering + cladding removal process is adopted. S6: Post-processing of finished products includes the following steps: surface polishing and dehydrogenation annealing of the formed welding wire, and packaging after passing inspection.

[0008] Preferably, the chemical composition of the high-temperature alloy welding wire with good plasticity is as follows by mass percentage: Cr: 21-23%, Mo: 8-10%, Co: 11-13%, Al: 0.8-1.5%, Ti: 0.2-0.6%, B: 0.002-0.005%, N: 0.05%, Si: 0.20%, P: 0.012%, S: 0.008%, Cu: 0.20%, Fe: 1.5%, O: 0.002%, with the balance being Ni.

[0009] Preferably, the argon gas has a purity of 99.99%, and the pouring speed is controlled at 5-10 kg / min.

[0010] Preferably, the high-temperature alloy forming process with good plasticity is as follows: hot-rolled wire rod is pickled with a sulfuric acid-nitric acid mixture at 40-60℃ for 5-10 minutes, cold-drawn in multiple passes with a deformation of 8-12% per pass, and after every 3-4 passes of drawing, it is annealed under hydrogen protection at 1050-1080℃ for 20-30 minutes, and finally drawn to 1.0-2.4 mm.

[0011] Preferably, the low-plasticity high-temperature alloy powder is prepared by argon atomization.

[0012] Preferably, the metal capillary sheath is made of stainless steel or carbon steel.

[0013] Preferably, the dehydrogenation annealing temperature is 400-500℃, and the holding time is 1-2 hours; the welding wire diameter tolerance is 0.02mm, and the straightness is 0.5mm / m.

[0014] Preferably, the chemical composition of the low-plasticity high-temperature alloy welding wire is as follows by mass percentage: Cr: 17.5-19.5%, Mo: 4.2-4.8%, W: 4.2-4.8%, Fe 4.0%, Al: 1.1-1.4%, Ti: 2.3-2.7%, Co: 0.5-0.7%, Mn 0.8%, Si 0.4%, C 0.06%, B 0.01%, Ce 0.01%, P 0.01%, S 0.008%, with the balance being Ni.

[0015] Preferably, the low-plasticity high-temperature alloy forming process is as follows: hot-rolled wire rod is made into alloy powder of 50-150 mm, which is filled into a metal tube sleeve sealed at one end with a filling density of 90%. After degassing at 300-400℃ and vacuum degree of 0.5 Pa for 1-2 hours, the other end is sealed and hot isostatic pressing is performed. After removing the sleeve, a fine welding wire of 0.6-1.2 mm is obtained.

[0016] Preferably, the low-plasticity high-temperature alloy powder is hot isostatically sintered at 1180-1220℃ and 120-150MPa for 2-3 hours.

[0017] Compared with related technologies, the manufacturing process of high-temperature alloy welding wire provided by the present invention has the following beneficial effects: This invention provides a manufacturing process for high-temperature alloy welding wire. By integrating vacuum induction melting and inert gas protected casting, it reduces oxidation inclusions during the melting process. The connection between continuous hot rolling and online solution treatment eliminates the separate solution heat treatment step in traditional processes, shortening the production cycle. Differentiated forming processes are used for high-temperature alloys with different plasticity grades, avoiding the complex processes required for preparing low-plasticity welding wire. This eliminates reliance on imported equipment and technology, significantly reducing production energy consumption and costs. Precise batching control, vacuum melting, and electromagnetic stirring refining ensure uniform welding wire composition. Homogenized heat treatment and reasonable forging and hot rolling process parameters result in a dense welding wire structure, reducing internal defects. Differentiated forming and annealing processes enhance the plasticity and toughness of the welding wire, giving it excellent high-temperature mechanical properties and resistance to hot corrosion, meeting the requirements for service in extreme environments. It is adaptable to the preparation of high-temperature alloy welding wires with different plasticity grades, capable of producing both conventional plasticity welding wires and low-plasticity fine welding wires, thus having a wide range of applications. Attached Figure Description

[0018] Figure 1 A schematic flow chart of a manufacturing process for a high-temperature alloy welding wire provided by the present invention; Figure 2 for Figure 1 The diagram shows the process flow for raw material pretreatment and batching. Figure 3 for Figure 1 The diagram shows a process flow chart of vacuum induction melting-inert gas protective casting. Figure 4 for Figure 1 The diagram shows a process flow chart for continuous hot rolling and online solution treatment. Figure 5 for Figure 1 The diagram shows the process flow of the molding procedure. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] First Embodiment Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 ,in, Figure 1 A schematic flow chart of a manufacturing process for a high-temperature alloy welding wire provided by the present invention; Figure 2 for Figure 1 The diagram shows the process flow for raw material pretreatment and batching. Figure 3 for Figure 1 The diagram shows a process flow chart of vacuum induction melting-inert gas protective casting. Figure 4 for Figure 1 The diagram shows a process flow chart for continuous hot rolling and online solution treatment. Figure 5 for Figure 1 The diagram shows the process flow of the molding procedure.

[0021] A manufacturing process for a high-temperature alloy welding wire includes the following steps: S1: raw material pretreatment and batching; S2: vacuum induction melting-inert gas protected casting; S3: homogenization heat treatment and one-time forging; S4: continuous hot rolling-online solution treatment; S5: differentiated forming treatment; and S6: finished product post-treatment. S1: Raw material pretreatment and batching includes the following steps: S11: Select metal raw materials and trace element additives with a purity of 99.9% and accurately batch them according to the chemical composition of the target welding wire; S12: Clean the surface of the raw materials of oil, oxide scale and impurities; S2: Vacuum induction melting-inert gas protected casting includes the following steps: S21: Put the raw material into a vacuum induction furnace, evacuate to a vacuum degree of 1.0 Pa, heat to 1420-1480℃ to melt and hold for 10-15 min, then heat to 1520-1580℃ and refine with electromagnetic stirring for 20-30 min; S22: Then, under argon protection, pour into a mold preheated at 400-600℃ to obtain an alloy ingot; The S3: homogenization heat treatment and one-time forging includes the following steps: holding the alloy ingot at 1230-1260℃ for 2-3 hours, and then forging it into a billet with a diameter of 30-50mm at 1180-1220℃, with a forging deformation of 50-60%; S4: Continuous hot rolling-online solution treatment includes the following steps: S41: Heat the forging billet to 1150-1190℃ and hold for 1-1.5h, then continuously hot roll it into wire rod with a diameter of 5.0-8.0mm, with the final hot rolling temperature not lower than 950℃; S42: Subsequently perform online solution treatment at a solution temperature of 1080-1120℃, hold for 30-40min, and then rapidly air cool. The S5: Differentiated forming process includes the following steps: S51: Select the forming process according to the plasticity grade of the high-temperature alloy. For high-temperature alloys with good plasticity, pickling + multi-pass cold drawing + intermediate annealing process is adopted; S52: For high-temperature alloys with low plasticity, powder preparation + cladding filling + vacuum degassing + hot isostatic pressing sintering + cladding removal process is adopted. S6: Post-processing of finished products includes the following steps: surface polishing and dehydrogenation annealing of the formed welding wire, and packaging after passing inspection.

[0022] The chemical composition of the high-temperature alloy welding wire with good plasticity, by mass percentage, is as follows: Cr: 21-23%, Mo: 8-10%, Co: 11-13%, Al: 0.8-1.5%, Ti: 0.2-0.6%, B: 0.002-0.005%, N: 0.05%, Si: 0.20%, P: 0.012%, S: 0.008%, Cu: 0.20%, Fe: 1.5%, O: 0.002%, with the balance being Ni.

[0023] The argon gas has a purity of 99.99%, and the pouring speed is controlled at 5-10 kg / min.

[0024] The specific high-temperature alloy forming process with good plasticity is as follows: hot-rolled wire rod is pickled with a sulfuric acid-nitric acid mixture at 40-60℃ for 5-10 minutes, cold-drawn in multiple passes with a deformation of 8-12% per pass, and after every 3-4 passes of drawing, it is annealed under hydrogen protection at 1050-1080℃ for 20-30 minutes, and finally drawn to 1.0-2.4mm.

[0025] The low-plasticity high-temperature alloy powder was prepared by argon atomization.

[0026] The metal capillary sheath is made of stainless steel or carbon steel.

[0027] The dehydrogenation annealing temperature is 400-500℃, and the holding time is 1-2 hours; the welding wire diameter tolerance is 0.02mm, and the straightness is 0.5mm / m.

[0028] The working principle of the manufacturing process for a high-temperature alloy welding wire provided by this invention is as follows: During operation, the chemical composition of the high-temperature alloy welding wire, by mass percentage, is as follows: Cr: 21-23%, Mo: 8-10%, Co: 11-13%, Al: 0.8-1.5%, Ti: 0.2-0.6%, B: 0.002-0.005%, N: 0.05%, Si: 0.20%, P: 0.012%, S: 0.008%, Cu: 0.20%, Fe: 1.5%, O: 0.002%, with the balance being Ni.

[0029] We select 99.9% pure nickel, chromium, molybdenum, cobalt, aluminum, titanium and other metal raw materials and boron additives, and accurately formulate them according to the above chemical composition; we use a combination of mechanical grinding and ultrasonic cleaning to clean the surface of the raw materials and remove oil and oxide scale.

[0030] The raw materials are put into a vacuum induction furnace, vacuumed to 0.8 Pa, heated to 1450℃ to melt the raw materials, and held at that temperature for 12 min; then heated to 1550℃ and refined under electromagnetic stirring for 25 min; under the protection of 99.99% pure argon gas, the mixture is poured into a mold preheated to 500℃ at a speed of 8 kg / min to obtain an alloy ingot with a diameter of 100 mm.

[0031] The ingot is placed in a heating furnace and heated to 1250℃, held for 2.5 hours; then forged into a round billet with a diameter of 40mm at 1200℃, with a deformation of 55%.

[0032] The round billet is heated to 1170℃ and held for 1.2 hours; it is then continuously hot-rolled into wire rods with a diameter of 6.0 mm, with a final hot rolling temperature of 980℃; immediately subjected to online solution treatment at 1100℃, held for 35 minutes, and then rapidly air-cooled to room temperature.

[0033] The hot-rolled wire rod was pickled in a sulfuric acid-nitric acid mixed solution at 45°C for 8 minutes to remove the oxide scale; it was then subjected to multiple cold drawing passes, with a deformation amount of 10% per pass. After every 3 passes of drawing, it was subjected to hydrogen-protected annealing at a temperature of 1060°C for 25 minutes; finally, it was drawn into a welding wire with a diameter of 1.2 mm.

[0034] The welding wire was surface polished to remove burrs; it was then subjected to dehydrogenation annealing at 450℃ for 1.5 hours; the diameter tolerance of the welding wire was 0.01 mm, and the straightness was 0.3 mm / m. Performance tests showed that the tensile strength of the weld deposited metal was 820 MPa, the yield strength was 560 MPa, the room temperature impact energy was 125 J, and the high temperature creep life at 700℃ / 175 MPa was 12000 hours, which met the requirements.

[0035] Compared with related technologies, the manufacturing process of high-temperature alloy welding wire provided by the present invention has the following beneficial effects: This invention provides a manufacturing process for high-temperature alloy welding wire. By integrating vacuum induction melting and inert gas protected casting, it reduces oxidation inclusions during the melting process. The connection between continuous hot rolling and online solution treatment eliminates the separate solution heat treatment step in traditional processes, shortening the production cycle. Differentiated forming processes are used for high-temperature alloys with different plasticity grades, avoiding the complex processes required for preparing low-plasticity welding wire. This eliminates reliance on imported equipment and technology, significantly reducing production energy consumption and costs. Precise batching control, vacuum melting, and electromagnetic stirring refining ensure uniform welding wire composition. Homogenized heat treatment and reasonable forging and hot rolling process parameters result in a dense welding wire structure, reducing internal defects. Differentiated forming and annealing processes enhance the plasticity and toughness of the welding wire, giving it excellent high-temperature mechanical properties and resistance to hot corrosion, meeting the requirements for service in extreme environments. It is adaptable to the preparation of high-temperature alloy welding wires with different plasticity grades, capable of producing both conventional plasticity welding wires and low-plasticity fine welding wires, thus having a wide range of applications.

[0036] Second Embodiment Based on the manufacturing process of a high-temperature alloy welding wire provided in the first embodiment of this application, the second embodiment of this application proposes another manufacturing process of a high-temperature alloy welding wire. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0037] Specifically, the difference in the manufacturing process of the high-temperature alloy welding wire provided in the second embodiment of this application is that the chemical composition of the low-plasticity high-temperature alloy welding wire by mass percentage is: Cr: 17.5-19.5%, Mo: 4.2-4.8%, W: 4.2-4.8%, Fe 4.0%, Al: 1.1-1.4%, Ti: 2.3-2.7%, Co: 0.5-0.7%, Mn 0.8%, Si 0.4%, C 0.06%, B 0.01%, Ce 0.01%, P 0.01%, S 0.008%, with the balance being Ni.

[0038] The specific process for forming the low-plasticity high-temperature alloy is as follows: hot-rolled wire rod is made into alloy powder of 50-150 mm, which is filled into a metal tube sleeve sealed at one end with a filling density of 90%. After degassing at 300-400℃ and a vacuum degree of 0.5 Pa for 1-2 hours, the other end is sealed and hot isostatic pressing is performed. After removing the sleeve, a fine welding wire of 0.6-1.2 mm is obtained.

[0039] The low-plasticity high-temperature alloy powder was hot isostatically sintered at 1180-1220℃ and 120-150MPa for 2-3 hours.

[0040] The working principle of the manufacturing process for a high-temperature alloy welding wire provided by this invention is as follows: During operation, the chemical composition of the high-temperature alloy welding wire, by mass percentage, is as follows: Cr: 17.5-19.5%, Mo: 4.2-4.8%, W: 4.2-4.8%, Fe 4.0%, Al: 1.1-1.4%, Ti: 2.3-2.7%, Co: 0.5-0.7%, Mn 0.8%, Si 0.4%, C 0.06%, B 0.01%, Ce 0.01%, P 0.01%, S 0.008%, with the balance being Ni.

[0041] Select the corresponding metal raw materials and additives with a purity of 99.9%, accurately formulate the ingredients according to the chemical composition, and clean the impurities on the surface of the raw materials.

[0042] The raw material was melted at 1430℃ under a vacuum of 0.6 Pa and held for 10 min; then heated to 1530℃ and refined by electromagnetic stirring for 20 min; and finally poured at a rate of 6 kg / min under argon protection to obtain an alloy ingot with a diameter of 90 mm.

[0043] The sample was held at 1240℃ for 2 hours and then forged at 1190℃ into a round billet with a diameter of 35mm, with a deformation of 52%.

[0044] The round billet is heated to 1160℃ and held for 1 hour, then hot-rolled into wire rod with a diameter of 5.0 mm, with a final temperature of 960℃; the online solution temperature is 1090℃, and after holding for 30 minutes, it is rapidly air-cooled.

[0045] Argon atomization was used to produce alloy powder of 80-120 μm from hot-rolled wire rod; a stainless steel fine tube sheath was prepared, one end of which was sealed, and the alloy powder was filled into the sheath with a filling density of 92%; the sheath was degassed at 350℃ and vacuum degree of 0.3 Pa for 1.5 h, and the other end was welded and sealed; the sheath was placed in a hot isostatic pressing equipment and sintered at 1200℃ and 130 MPa for 2.5 h to obtain a near-net-shape wire; the stainless steel sheath was removed by chemical etching process to obtain a fine welding wire with a diameter of 0.8 mm.

[0046] After surface polishing, it is hydrogen-free annealed at 420℃ for 1.2h; the diameter tolerance is 0.01mm and the straightness is 0.2mm / m. Then, performance testing and hot corrosion resistance testing are carried out.

[0047] Compared with related technologies, the manufacturing process of high-temperature alloy welding wire provided by the present invention has the following beneficial effects: This invention provides a manufacturing process for high-temperature alloy welding wire. Through precise batching control, vacuum melting, and electromagnetic stirring refining, the uniform composition of the welding wire is ensured. Homogenized heat treatment and reasonable forging and hot rolling process parameters result in a dense welding wire structure, reducing internal defects. Differentiated forming and annealing processes enhance the plasticity and toughness of the welding wire. This manufacturing process for high-temperature alloy welding wire achieves short process flow, low energy consumption, and controllable cost, while ensuring uniform composition and dense structure, possessing excellent high-temperature mechanical properties and resistance to hot corrosion. It is adaptable to the preparation of high-temperature alloy welding wires with different plasticity grades, and especially meets the production requirements of fine welding wires for precision welding.

[0048] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A manufacturing process for a high-temperature alloy welding wire, characterized in that, Includes the following steps: S1: Raw material pretreatment and batching; S2: Vacuum induction melting - inert gas protected casting; S3: Homogenization heat treatment and primary forging; S4: Continuous hot rolling - online solution treatment; S5: Differentiated forming treatment; and S6: Finished product post-treatment. S1: Raw material pretreatment and batching The process includes the following steps: S11: Select metal raw materials and trace element additives with a purity of 99.9% and accurately formulate the materials according to the target welding wire chemical composition; S12: Clean the surface of the raw materials of oil, oxide scale and impurities; S2: Vacuum induction melting-inert gas protected casting includes the following steps: S21: Put the raw material into a vacuum induction furnace, evacuate to a vacuum degree of 1.0 Pa, heat to 1420-1480℃ to melt and hold for 10-15 min, then heat to 1520-1580℃ and refine with electromagnetic stirring for 20-30 min; S22: Then, under argon protection, pour into a mold preheated at 400-600℃ to obtain an alloy ingot; The S3: homogenization heat treatment and one-time forging includes the following steps: holding the alloy ingot at 1230-1260℃ for 2-3 hours, and then forging it into a billet with a diameter of 30-50mm at 1180-1220℃, with a forging deformation of 50-60%; S4: Continuous hot rolling-online solution treatment includes the following steps: S41: Heat the forging billet to 1150-1190℃ and hold for 1-1.5h, then continuously hot roll it into wire rod with a diameter of 5.0-8.0mm, with the final hot rolling temperature not lower than 950℃; S42: Subsequently perform online solution treatment at a solution temperature of 1080-1120℃, hold for 30-40min, and then rapidly air cool. The S5: Differentiated forming process includes the following steps: S51: Select the forming process according to the plasticity grade of the high-temperature alloy. For high-temperature alloys with good plasticity, pickling + multi-pass cold drawing + intermediate annealing process is adopted; S52: For high-temperature alloys with low plasticity, powder preparation + cladding filling + vacuum degassing + hot isostatic pressing sintering + cladding removal process is adopted. S6: Post-processing of finished products includes the following steps: surface polishing and dehydrogenation annealing of the formed welding wire, and packaging after passing inspection.

2. The manufacturing process of a high-temperature alloy welding wire according to claim 1, characterized in that, The chemical composition of the high-temperature alloy welding wire with good plasticity, by mass percentage, is as follows: Cr: 21-23%, Mo: 8-10%, Co: 11-13%, Al: 0.8-1.5%, Ti: 0.2-0.6%, B: 0.002-0.005%, N: 0.05%, Si: 0.20%, P: 0.012%, S: 0.008%, Cu: 0.20%, Fe: 1.5%, O: 0.002%, with the balance being Ni.

3. The manufacturing process of a high-temperature alloy welding wire according to claim 1, characterized in that, The argon gas has a purity of 99.99%, and the pouring speed is controlled at 5-10 kg / min.

4. The manufacturing process of a high-temperature alloy welding wire according to claim 2, characterized in that, The specific high-temperature alloy forming process with good plasticity is as follows: hot-rolled wire rod is pickled with a sulfuric acid-nitric acid mixture at 40-60℃ for 5-10 minutes, cold-drawn in multiple passes with a deformation of 8-12% per pass, and after every 3-4 passes of drawing, it is annealed under hydrogen protection at 1050-1080℃ for 20-30 minutes, and finally drawn to 1.0-2.4mm.

5. The manufacturing process of a high-temperature alloy welding wire according to claim 1, characterized in that, The low-plasticity high-temperature alloy powder was prepared by argon atomization.

6. The manufacturing process of a high-temperature alloy welding wire according to claim 1, characterized in that, The metal capillary sheath is made of stainless steel or carbon steel.

7. The manufacturing process of a high-temperature alloy welding wire according to claim 1, characterized in that, The dehydrogenation annealing temperature is 400-500℃, and the holding time is 1-2 hours; the welding wire diameter tolerance is 0.02mm, and the straightness is 0.5mm / m.

8. The manufacturing process of a high-temperature alloy welding wire according to claim 1, characterized in that, The chemical composition of the low-plasticity high-temperature alloy welding wire, by mass percentage, is as follows: Cr: 17.5-19.5%, Mo: 4.2-4.8%, W: 4.2-4.8%, Fe 4.0%, Al: 1.1-1.4%, Ti: 2.3-2.7%, Co: 0.5-0.7%, Mn 0.8%, Si 0.4%, C 0.06%, B 0.01%, Ce 0.01%, P 0.01%, S 0.008%, with the balance being Ni.

9. The manufacturing process of a high-temperature alloy welding wire according to claim 8, characterized in that, The specific process for forming the low-plasticity high-temperature alloy is as follows: hot-rolled wire rod is made into alloy powder of 50-150 mm, which is filled into a metal tube sleeve sealed at one end with a filling density of 90%. After degassing at 300-400℃ and a vacuum degree of 0.5 Pa for 1-2 hours, the other end is sealed and hot isostatic pressing is performed. After removing the sleeve, a fine welding wire of 0.6-1.2 mm is obtained.

10. The manufacturing process of a high-temperature alloy welding wire according to claim 9, characterized in that, The low-plasticity high-temperature alloy powder is hot isostatically sintered at 1180-1220℃ and 120-150MPa for 2-3 hours.

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