High-strength high-temperature nickel alloy welding material and preparation method thereof

Abstract

The invention belongs to the field of metal material processing, and particularly relates to a high-strength high-temperature nickel alloy welding material and a preparation method thereof.The high-strength high-temperature nickel alloy welding material comprises, by weight, 0.02%-0.05% of C, 0.10%-0.20% of Si, 18.0%-22.0% of Cr, 7.0%-9.0% of Fe, 4.0%-6.0% of Co, 2.0%-4.0% of W, 3.0%-6.0% of Mo, 0.005%-0.010% of B, 0.5%-2.5% of the total amount of Al and Ti, 0.05%-0.08% of Zr, 2.0%-2.5% of Nb, 0.30%-0.40% of RE, smaller than 0.005% of S, smaller than 0.005% of P, 1.5%-4.0% of modified boron nitride mixed powder and the balance Ni, the high-strength and high-temperature nickel alloy welding material is obtained through hot working, heat treatment, surface treatment and coating preparation, and the problem that in the prior art, deposited metal formed after welding of the high-strength and high-temperature nickel alloy welding material is poor in high-temperature mechanical property in a high-temperature environment can be effectively solved.

Description

Technical Field

[0001] The present invention belongs to the field of metal materials, and in particular relates to a high-strength and high-temperature nickel alloy welding material and a preparation method thereof. Background Art

[0002] With the advancement of my country's heavy industry technology, the requirements for alloy material performance are getting higher and higher. The working environment of nuclear industry and aircraft is harsh, and they are in high temperature and high pressure working environment for a long time, some even up to 900-1000℃, which requires alloy materials with better heat resistance and high temperature physical and chemical properties. High temperature alloys refer to a type of alloy based on iron, nickel and cobalt, which can serve in high temperature environment, withstand severe mechanical stress and have good surface stability. They generally have high room temperature and high temperature strength, good oxidation resistance and thermal corrosion resistance, excellent creep and fatigue resistance, good organizational stability and reliability of use.

[0003] On the other hand, as the structure of high-temperature alloy structural parts becomes more and more complex, the precision becomes higher and higher, and the manufacturing difficulty increases, precision casting alone cannot achieve the final structure. It must be combined with reliable welding technology and other advanced processing and manufacturing technologies to achieve split casting of high-temperature alloy structural parts. In addition, the melting welding method can not only achieve the connection of high-temperature alloy structural parts, but also repair defects, effectively improving the working reliability and economy of high-temperature alloy structural parts.

[0004] At present, nickel-based high-temperature alloys are prone to crack formation during fusion welding and have poor weldability. The welding position of nickel-based high-temperature alloy structural parts must have excellent temperature bearing capacity and must not have welding defects. Among the existing welding wires in my country, there are few welding wires that can be used for high-temperature alloys, especially nickel-based high-temperature alloys with excellent high-temperature performance. This is because cracks are easily formed during the welding of high-temperature alloys and cannot meet the use requirements; the high-temperature mechanical strength after welding is insufficient. Therefore, it is urgent to develop a high-strength high-temperature nickel alloy welding material that meets the welding requirements of high-temperature alloy parts. Summary of the invention

[0005] The purpose of the present invention is to provide a new type of high-strength high-temperature nickel alloy welding material and its preparation method in view of the problem that the deposited metal formed after welding with nickel-based alloy wire in the prior art has poor high-temperature mechanical properties; the new type of material can effectively solve the above problem, and the deposited metal still has a high yield strength in a high-temperature environment. To achieve the above purpose, the technical solution adopted by the present invention to solve its technical problem is: The present invention provides a high-strength and high-temperature nickel alloy welding material, comprising the following powder raw materials in parts by weight: C: 0.02 - 0.05%, Si: 0.10 - 0.20%, Cr: 18.0 - 22.0%, Fe: 7.0 - 9.0%, Co: 4.0 - 6.0%, W: 2.0 - 4.0%, Mo: 3.0 - 6.0%, B: 0.005 - 0.010%, total amount of Al + Ti: 0.5 - 2.5%, Zr: 0.05 - 0.08%, Nb: 2.0 - 2.5%, RE: 0.30 - 0.40%, S: < 0.005%, P: < 0.005%, modified boron nitride mixed powder: 1.5 - 4.0%, balance Ni.

[0006] Further, the total weight ratio of the above - mentioned Al to Ti is 1:(0.8 - 1.5).

[0007] Further, the above - mentioned RE is Y, Ce or Sm.

[0008] Further, the preparation method of the above - mentioned modified boron nitride mixed powder includes the following steps: S11, prepare a boron nitride dispersion; S12, add active metal powder to the boron nitride dispersion and carry out ball - milling treatment; S13, after the ball - milling ends, dry it to obtain the modified boron nitride mixed powder.

[0009] Further, The dosage ratio of the above - mentioned boron nitride to the active metal powder is 1.0 - 5.0 g:100 g.

[0010] Further, The above - mentioned boron nitride has a lamellar structure with a size of 50 - 80 nm; and The above - mentioned active metal powder is aluminum powder and / or titanium powder with a particle size of 30 - 50 μm.

[0011] Another object of the present invention is to provide a preparation method of a high - strength and high - temperature nickel - based alloy welding material, including the following steps: S21: Raw material preparation; that is S211: Raw material proportioning: Under argon protection, prepare the original metal powder except for the modified boron nitride mixed powder; S212: High - temperature vacuum melting: Carry out high - temperature vacuum melting on the prepared metal powder to obtain a nickel - containing alloy melt; S213: Atomization powder making: Treat the nickel - containing alloy melt by argon atomization method, and obtain spherical atomized nickel - based superalloy powder after screening; S214: Wet - mixing method blending: Add the spherical atomized nickel - based superalloy powder and the modified boron nitride mixed powder into ethanol, carry out ultrasonic treatment to obtain an ethanol suspension; carry out drying treatment to obtain a mixed powder; S22: Hot working; that is S221: Hot isostatic pressing treatment: Place the mixed powder in a stainless steel sleeve, leave a certain space, conduct degassing treatment, and then sinter it into a bar blank in a hot isostatic press; S222: Forging and rolling: Forge and roll the bar blank to prepare an alloy wire rod; S223: Drawing - annealing: Conduct multi - pass drawing - annealing on the alloy wire rod; S23: Heat treatment; that is S231: Solution treatment; S232: Aging treatment; S24: Surface treatment; that is Pickle and coat the alloy wire; S25: Plating; that is Apply a coating on the surface to obtain the target product.

[0012] Furthermore, The average particle size of the original metal powder in the above - mentioned S211 is 50 - 100 μm; The vacuum degree of vacuum melting in the above - mentioned S212 is 5×10 3 -8×10 3 Pa, and the melting temperature is 1420 - 1600 °C; and The process parameters of the argon atomization method in the above - mentioned S213 are as follows: atomization temperature 1680 - 1720 °C, atomization pressure 0.3 bar, inlet flow rate 45 - 55 mL / min, 99.99% high - purity Ar.

[0013] Another object of the present invention is to provide the application of the above - mentioned high - strength high - temperature nickel - based alloy welding material in the welding of nickel - based cast superalloys.

[0014] The present invention has the following beneficial effects: (1) The present invention provides a high - strength high - temperature nickel - based alloy welding material. With Ni as the matrix, Cr can improve high - temperature oxidation and corrosion resistance; Co can improve anti - carburization performance, improve plasticity and hot - working performance; Mo can refine grains and improve the thermal stability of the alloy; W can improve the strength of the alloy; the addition of Cr, Co, Mo, and W achieves solid - solution strengthening, enhancing its high - temperature oxidation resistance and thermal strength; at the same time, it can form carbides with C and be dispersed in the solid - solution - strengthened matrix to improve high - temperature strength and plasticity.

[0015] (2) The present invention provides a high-strength and high-temperature nickel alloy welding material, in which a certain amount of Nb and a compound of Al and Ti elements are added. First, Nb is an element for forming high-temperature strengthening phases, which can effectively improve the high-temperature strength and high-temperature stability of the alloy, reduce the tendency of strain cracking, and delay corrosion. Second, Al and Ti can improve the weldability of the alloy, facilitate the formation of the weld seam, have a certain strengthening and toughening effect on the alloy, and are beneficial to improving the high-temperature mechanical properties of the alloy.

[0016] (3) The present invention provides a high-strength and high-temperature nickel alloy welding material, in which a certain amount of modified boron nitride mixed powder material is added. The modified boron nitride mixed powder is a structure of nano-titanium and / or aluminum modified boron nitride and a mixed powder of titanium and / or aluminum. First, on the one hand, the nano-titanium and / or aluminum on the surface of boron nitride endow it with excellent compatibility with the metal phase, and then form a good bonding interface. On the other hand, the high specific surface area of boron nitride gives the nano-titanium and / or aluminum a larger contact surface with the matrix, improves the dispersion effect, and has a synergistic effect. In addition, the weldability of the nano-titanium and / or aluminum enriched on the surface of boron nitride can be strengthened nearby, effectively reducing the probability of boron nitride debonding. Second, boron nitride is a two-dimensional material with an extremely large specific surface area, which can effectively prevent the growth of grains during heat treatment and has the effect of fine grain strengthening. At the same time, it can increase the lattice distortion energy in the dislocation-affected area, increasing the slip resistance. In addition, when the alloy is subjected to external force loading, the two-dimensional structure can withstand mechanical loads and improve the mechanical properties. Third, boron nitride has excellent thermal conductivity and thermal stability, which can reduce welding defects and improve high-temperature performance. Fourth, the titanium and / or aluminum in the mixed powder material do not need to be separated and can be directly added for use, which not only improves efficiency but also can be used as a supplement to the alloy formula to improve properties such as weldability.

[0017] (4) The present invention provides a preparation method for a high-strength and high-temperature nickel alloy welding material, which uses argon atomization to improve the purity of each metal powder; and wet mixing to improve the mixing uniformity of different metal powders, especially the uniformity of the modified boron nitride mixed powder in the metal powder, and improve the mechanical properties. Specific Embodiments

[0018] The present invention will be described in detail below with reference to the embodiments. However, it should be understood that the following embodiments are only illustrative examples of the embodiments of the present invention, rather than limiting the scope of the present invention.

[0019] The object of the present invention is to develop a high-strength and high-temperature nickel alloy welding consumable to solve the problems existing in the existing high-strength and high-temperature nickel alloy welding consumables. The implementation idea is as follows: Considering that the boron nitride sheet structure has excellent properties, but there are problems with matrix compatibility and dispersion, it is modified with active metals before use; and mainly based on Ni, solid solution strengthening is achieved by adding anti-high-temperature elements such as Cr, Co, Mo, and W through formula design to improve oxidation resistance and hot corrosion resistance; elements such as B and Fe are added to increase hardness and plasticity; Nb is added to improve alloy stress corrosion cracking resistance and high-temperature plasticity; precipitation strengthening elements such as Al and Ti are added to improve high-temperature strength, purify grain boundaries, and improve alloy microstructure stability; at the same time, rare earth elements RE are added to disperse and fix some impurities, purify grain boundaries, improve the high-temperature properties of the alloy, and improve the hot working performance and oxidation resistance of the alloy; finally, modified boron nitride mixed powder materials are added to improve high-temperature mechanical properties. By further improving the performance of the above components through the preparation process, high-performance weld metal deposition can be obtained. The embodiments of the present invention are as follows: An embodiment of the present invention provides a high-strength and high-temperature nickel alloy welding consumable, comprising the following powder raw materials in parts by weight: C: 0.02 - 0.05%, Si: 0.10 - 0.20%, Cr: 18.0 - 22.0%, Fe: 7.0 - 9.0%, Co: 4.0 - 6.0%, W: 2.0 - 4.0%, Mo: 3.0 - 6.0%, B: 0.005 - 0.010%, total amount of Al + Ti: 0.5 - 2.5%, Zr: 0.05 - 0.08%, Nb: 2.0 - 2.5%, RE: 0.30 - 0.40%, S: <0.005%, P: <0.005%, modified boron nitride mixed powder: 1.5 - 4.0%, balance Ni.

[0020] The total weight ratio of the above Al to Ti is 1:(0.8 - 1.5).

[0021] Al and Ti can improve the weldability of the alloy, can be used as deoxidizing elements, are beneficial to the formation of the weld, and have a certain strengthening and toughening effect on the alloy. Al is the main element for forming the γ'(Ni3Al) phase and plays a precipitation strengthening role. 90% of Ti enters the γ' phase, and Ti can replace Al in the γ'(Ni3Al) phase to form Ni3(Al, Ti). At the same time, considering that there are a large amount of Al and / or Ti powders in the modified boron nitride mixed powder. Considering comprehensively, the total weight fraction of Al and Ti is not higher than 4.5%, and the total weight ratio of Al to Ti is 1:(0.8 - 1.5).

[0022] The above RE is Y, Ce or Sm.

[0023] RE can attract impurity sulfur, thus dispersing and fixing part of the impurities, purifying the grain boundaries, improving the high-temperature properties of the alloy; and at the same time improving the hot working performance and oxidation resistance of the alloy.

[0024] The preparation method of the modified boron nitride mixed powder includes the following steps: S11, adding boron nitride into absolute ethanol and ultrasonically vibrating for 20 min to obtain a boron nitride dispersion; The dosage ratio of the above boron nitride to absolute ethanol is 1.0 - 5.0 g:50 mL; and The above boron nitride has a lamellar structure with a size of 50 - 80 nm.

[0025] S12, adding the active metal powder, boron nitride dispersion, and absolute ethanol into a ball mill, adjusting the ball milling speed to 200 - 300 r / min, the ball milling duration to 12 - 18 h (stopping for 0.25 h every 1 h), and the ball-to-material mass ratio to 8 - 10:1; The dosage ratio of the above active metal powder to boron nitride is 100 g:1.0 - 5.0 g; The dosage ratio of the above active metal powder to absolute ethanol is 100 g:100 mL; and The above active metal powder is aluminum powder and / or titanium powder with a particle size of 30 - 50 μm.

[0026] S13, after the ball milling is completed, place it in an 80°C drying oven for drying treatment for 2 h to obtain the modified boron nitride mixed powder.

[0027] The above modified boron nitride mixed powder is a mixture of nano titanium and / or aluminum modified boron nitride and the active metal. First, for nano titanium and / or aluminum modified boron nitride, on the one hand, the nano titanium and / or aluminum on the surface of boron nitride endow it with excellent compatibility with the metal phase, and then form a good bonding interface; on the other hand, the high specific surface area of the lamellar boron nitride gives nano titanium and / or aluminum a larger contact surface with the matrix, improving the dispersion effect of nano titanium and / or aluminum, and having a synergistic effect; in addition, the weldability of the nano titanium and / or aluminum enriched on the surface of boron nitride can be strengthened nearby, effectively reducing the probability of boron nitride debonding; Second, for the excessive titanium and / or aluminum in the mixed powder material, there is no need to separate them and they can be directly added and used, which not only improves the efficiency but also can be used as a supplement to the alloy formula, and the excessive titanium and / or aluminum helps to achieve a better modification effect on boron nitride, ultimately improving the comprehensive properties such as weldability.

[0028] In addition, the above modified boron nitride with a lamellar two-dimensional material structure can improve the mechanical properties such as the high-temperature yield strength and plasticity of the nickel alloy material through mechanisms such as fine grain strengthening, dislocation strengthening, and stress transfer.

[0029] In addition, the other important components and functions in the embodiments of the present invention are as follows: Element Cr is the main element for the high-temperature oxidation resistance of the alloy. It forms a dense Cr2O3 protective layer with antioxidant and corrosion-resistant properties on the surface of the matrix material, which can prevent high-temperature oxidation and hot corrosion. Generally, when the Cr content exceeds 12%, it will have good high-temperature oxidation resistance. When it exceeds 33%, the increase in Cr content has little effect on improving high-temperature oxidation resistance, and the α-Cr phase that is not conducive to mechanical properties will precipitate. Therefore, in the present invention, the Cr content is controlled at 18.0 - 22.0%.

[0030] The addition of element Co achieves a solution strengthening effect, improving its high-temperature oxidation resistance and thermal strength. Co can also form carbides with C, which are dispersed in the solution-strengthened matrix, improving high-temperature strength and plasticity.

[0031] Element Mo can improve high-temperature strength and the corrosion resistance of the alloy. Especially in the case of combined action with chromium, the pitting corrosion resistance is more excellent. At the same time, through solution strengthening, Mo enhances the creep resistance of the alloy and can reduce the grain boundary weakening caused by radiation. The addition of Mo can significantly improve the corrosion resistance and high-temperature strength of the welding wire.

[0032] Fe can improve the weld strength through solution strengthening.

[0033] Nb is a strengthening element in a high-temperature environment. It can increase the lattice distortion of the solid solution and the lattice atomic bond attraction, strengthening the matrix, and the solution strengthening effect is relatively significant. At the same time, it is also a strong carbide-forming element, which can form MC, M6C or M2C-type carbides, playing a significant second-phase strengthening role in the weld metal, improving the high-temperature strength and plasticity coordination, and enhancing the high-temperature creep performance of the nickel alloy of the present invention. In addition, it can also reduce the segregation of alloying elements and improve the plasticity of the weld metal.

[0034] The addition of trace elements Zr and B strengthens the grain boundary, improves the creep strength of the weld deposited metal, and the trace addition will not increase the sensitivity to welding hot cracks.

[0035] Another object of the embodiments of the present invention is to provide a method for preparing a high-strength high-temperature nickel alloy welding material, including the following steps: S21: Raw material preparation; that is S211: Raw material ratio: Under argon protection, prepare the original metal powder except for the modified boron nitride mixed powder; The average particle size of the above-mentioned original metal powder is 50 - 100 μm; S212: High-temperature vacuum melting: Subject the prepared metal powder to high-temperature vacuum melting to obtain a nickel-containing alloy melt; The vacuum degree of the above-mentioned vacuum melting is 5×10 3 -8×10 3Pa，熔炼温度为1420-1600℃；以及 S213: Atomization powder making: Treat the nickel-containing alloy melt by argon atomization method, and obtain spherical atomized nickel-based superalloy powder after screening; The process parameters of the above argon atomization method treatment are as follows: atomization temperature is 1680 - 1720 °C, atomization pressure is 0.3 bar, the flow rate is 45 - 55 mL / min, and 99.99% high-purity Ar is used.

[0036] S214: Wet mixing blending: Add the spherical atomized nickel-based superalloy powder and the modified boron nitride mixed powder into ethanol, stir magnetically at 1000 r / min for 3 h, then place it under ultrasonic treatment at 50 KHz for 2 h to obtain an ethanol suspension; filter, take the insoluble matter, place it in a drying oven at 80 °C for drying treatment for 2 h to obtain a mixed powder body.

[0037] S22: Hot working; that is S221: Hot isostatic pressing treatment: Place the mixed powder body in a stainless steel sleeve, reserve a certain space, conduct degassing treatment, and then place it in a hot isostatic press to sinter into a bar blank; The above degassing treatment process is that the furnace temperature is maintained at 660 - 700 °C, the vacuum degree is <0.1 Pa, and it is maintained for 6 - 8 h; the above sintering process is to heat up to 1220 - 1280 °C at a heating rate of 25 °C / min, then apply a gas pressure of 120 - 180 MPa to the surface, and keep it under constant pressure and constant temperature for 4 - 6 h and cool with the furnace to obtain a cylindrical powder sintered bar blank; S222: Forging and rolling: Forge and roll the bar blank to prepare an alloy wire rod; The above forging process is to perform cogging forging into alloy blank I at 900 - 950 °C, with a forging ratio of 3 - 4, tempering and heating at 950 - 1000 °C for 1 - 2 h, then forging into alloy blank II at 1000 - 1050 °C, with a forging ratio of 5 - 6, and then forging into alloy blank III at 1000 - 1050 °C, with a forging ratio of 3 - 4; The above rolling process is to keep the temperature at 1000 - 1050 °C for 0.5 - 1.5 h, and hot roll into an alloy wire rod with a diameter of Φ4.0 - 5.0 mm at 950 - 1100 °C.

[0038] S223: Drawing - annealing: Perform multi-pass drawing - annealing on the alloy wire rod; Add a lubricant before drawing, perform 6 - 8 passes of drawing processing to obtain an alloy wire with a diameter of Φ1.0 - 1.5 mm; The above annealing is vacuum annealing, and the annealing temperature is 850 - 950 °C.

[0039] S23: Heat treatment; that is S231: Solution treatment; The above solution treatment is a multi-step grading treatment; specifically, in a nitrogen environment, it is heated to 950 - 1000 °C, held for 2 - 3 h, then continuously heated to 1120 - 1170 °C, held for 2 - 3 h, and rapidly water quenched to obtain a solution-treated alloy; S232: Aging treatment; The above aging treatment is a multi-step grading treatment; specifically, it is heated to 800 - 850 °C, held for 3 - 8 h, air cooled, then heated to 750 - 770 °C, held for 10 - 15 h, and air cooled.

[0040] S24: Surface treatment; that is The alloy wire is pickled; coated; specifically, and without special instructions, the pickling in the following examples and comparative examples of the present invention is to pickle the heat-treated alloy wire. First, it is pickled with a mixed pickling solution containing 100 g / L nitric acid and 20 g / L hydrofluoric acid, controlling the temperature ≤ 50 °C, and the pickling time is 10 min; finally, the residual acid on the surface is washed; Coating is to coat a water-soluble coating agent on the surface of the pickled alloy wire, and the coated alloy wire is naturally air-dried.

[0041] S25: Plating; that is Plating is carried out on the surface to obtain the target product.

[0042] The above surface plating process and without special instructions, the plating processes in the following examples and comparative examples of the present invention are all the following steps: Pretreatment: The surface of the high-temperature nickel-based alloy welding wire is cleaned, its surface is polished with sandpaper, then polished, and then cleaned in a mixed solution of sodium hydroxide (20 g / L), trisodium phosphate (30 g / L), and sodium silicate (30 g / L) at 50 °C for 10 min. Finally, electrolytic polishing is carried out in a mixed acid of 80% acetic acid and 20% perchloric acid, with an electrolytic voltage of 27 V and a power-on time of 7 s to obtain welding wire I; Nickel plating: Prepare a Watt-type electrolyte. The electroplating solution includes nickel sulfate hexahydrate, nickel chloride hexahydrate, and boric acid. Electroplate a nickel layer on the surface of welding wire I to obtain welding wire II. The electroplating process parameters are a current density of 3 A / dm 2 , an electroplating time of 10 min, an electroplating temperature of 45 °C, and a stirring speed of 300 r / min; TiC plating: Prepare a TiC electroplating solution. The TiC electroplating solution includes, by mass-volume ratio: TiC 30 g / L, NiSO4 400 g / L, NiCl2 45 g / L, H3BO3 50 g / L, and the balance is water; the particle size of TiC is 3 - 10 μm. Electroplate a TiC layer on the nickel layer of welding wire II to obtain welding wire III. The electroplating process parameters are a current density of 3 A / dm 2, electroplating time is 0.5 h, electroplating temperature is 45 °C, stirring speed is 300 r / min; Nickel plating: Prepare Watt-type electrolyte. The electroplating solution includes 400 g / L NiSO4, 45 g / L NiCl2, 50 g / L H3BO3, and the balance is water. A nickel layer is electroplated on the TiC coating of the welding wire III to obtain a nuclear power high-temperature nickel-based alloy composite welding wire. The electroplating process parameters are current density 3 A / dm 2 , electroplating time is 10 min, electroplating temperature is 45 °C, stirring speed is 300 r / min.

[0043] Another object of the present invention is to provide the application of the above high-strength high-temperature nickel alloy welding material in the welding of nickel-based cast high-temperature alloys.

[0044] To further understand the present invention, the high-strength high-temperature nickel alloy welding material provided by the present invention will be described in detail below in conjunction with specific embodiments. The protection scope of the present invention is not limited by the following embodiments.

[0045] Example 1 This example provides a high-strength high-temperature nickel alloy welding material, including the following parts by weight of powder raw materials: C: 0.04%, Si: 0.15%, Cr: 20.0%, Fe: 8.0%, Co: 5.0%, W: 3.0%, Mo: 4.5%, B: 0.008%, total amount of Al+Ti: 1.5%, Zr: 0.06%, Nb: 2.33%, RE: 0.36%, S: 0.002%, P: 0.002%, modified boron nitride mixed powder: 3.0%, balance Ni.

[0046] The total weight ratio of the above Al to Ti is 1:1.2.

[0047] The above RE is Y.

[0048] The preparation method of the above modified boron nitride mixed powder includes the following steps: S11, Add boron nitride to absolute ethanol and ultrasonically vibrate for 20 min to obtain a boron nitride dispersion; The dosage ratio of the above boron nitride to absolute ethanol is 3.0 g:50 mL.

[0049] S12, Add the active metal powder, boron nitride dispersion, and absolute ethanol to a ball mill, adjust the ball milling speed to 260 r / min, the ball milling duration is 14 h (stop for 0.25 h every 1 h), and the ball-to-material mass ratio is 9:1; The dosage ratio of the above active metal powder to boron nitride is 100 g:3.0 g; The dosage ratio of the above active metal powder to absolute ethanol is 100 g:100 mL; and The above active metal powder is a mixture of aluminum powder and titanium powder.

[0050] S13. After ball milling, it is placed in a drying oven at 80 °C for drying treatment for 2 h to obtain the modified boron nitride mixed powder.

[0051] Another object of this embodiment is to provide a preparation method of a high-strength and high-temperature nickel alloy welding material, including the following steps: S21: Raw material preparation; that is S211: Raw material ratio: Under argon protection, the original metal powder except the modified boron nitride mixed powder is prepared; S212: High-temperature vacuum melting: The prepared metal powder is subjected to high-temperature vacuum melting to obtain a nickel-containing alloy melt; The above vacuum melting vacuum degree is 7×10 3 Pa, and the melting temperature is 1520 °C; and S213: Atomization powder making: The nickel-containing alloy melt is treated by argon atomization method, and spherical atomized nickel-based superalloy powder is obtained after screening; The above argon atomization method treatment process parameters are atomization temperature 1700 °C, atomization pressure 0.3 bar, inlet flow rate 50 mL / min, 99.99% high-purity Ar; S214: Wet mixing method blending: The spherical atomized nickel-based superalloy powder and the modified boron nitride mixed powder are added to ethanol, magnetically stirred at 1000 r / min for 3 h, then placed in an ultrasonic treatment at 50 KHz for 2 h to obtain an ethanol suspension; filtered, the insoluble matter is taken, placed in a drying oven at 80 °C for drying treatment for 2 h to obtain a mixed powder.

[0052] S22: Hot working; that is S221: Hot isostatic pressing treatment: The mixed powder is placed in a stainless steel sleeve, and a certain space is reserved for degassing treatment, and then placed in a hot isostatic press to sinter into a bar blank; The above degassing treatment process is that the furnace temperature is maintained at 680 °C, the vacuum degree <0.1 Pa, and it is maintained for 6.5 h; the above sintering process is to heat up to 1250 °C at a heating rate of 25 °C / min, then apply a gas pressure of 150 MPa to the surface, and keep it for 5 h under constant pressure and constant temperature and cool with the furnace to obtain a cylindrical powder sintered bar blank; S222: Forging and rolling: The bar blank is forged and rolled to prepare an alloy wire rod; The forging process is to open the billet and forge it into alloy billet I at 930 °C, the forging ratio is 3.5, after tempering and heating at 980 °C for 1.5 h, forge it into alloy billet II at 1020 °C, the forging ratio is 5.5, and then forge it into alloy billet III at 1020 °C, the forging ratio is 3.5; The rolling process described above is to hold at 1020°C for 1 hour and hot roll into Φ4.5mm alloy wire rods at 1000°C; S223: Drawing - annealing: Perform multi - pass drawing - annealing on the alloy wire rods; Add lubricant before drawing, perform 7 - pass drawing to obtain Φ1.2mm alloy wires; The annealing described above is vacuum annealing, and the annealing temperature is 900°C.

[0053] S23: Heat treatment; that is S231: Solution treatment; The above solution treatment is a multi - step grading treatment; specifically, in a nitrogen environment, heat to 980°C, hold for 2.5 hours, continue to heat to 1150°C, hold for 2.5 hours, and then rapidly water - quench to obtain a solution - state alloy; S232: Aging treatment; The above aging treatment is a multi - step grading treatment; specifically, heat to 820°C, hold for 5 hours, air - cool, then heat to 760°C, hold for 12 hours, and air - cool.

[0054] S24: Surface treatment; that is Pickle and coat the alloy wires.

[0055] S25: Plating; that is Perform plating on the surface to obtain the target product.

[0056] Example 2 This example provides a high - strength high - temperature nickel - alloy welding material, including the following powder raw materials in parts by weight: C: 0.02%, Si: 0.20%, Cr: 18.0%, Fe: 7.0%, Co: 6.0%, W: 2.0%, Mo: 6.0%, B: 0.01%, total amount of Al + Ti: 0.5%, Zr: 0.05%, Nb: 2.0%, RE: 0.30%, S: 0.002%, P: 0.002%, modified boron nitride mixed powder: 4.0%, Ni balance.

[0057] The total weight ratio of the above Al to Ti is 1:1.2.

[0058] The above RE is Y.

[0059] The preparation method of the above modified boron nitride mixed powder is the same as that in Specific Example 1.

[0060] Another object of this example is to provide a preparation method of a high - strength high - temperature nickel - alloy welding material, including the following steps: S21: Raw material preparation; that is S211: Raw material ratio: Under argon protection, prepare the original metal powder except for the modified boron nitride mixed powder; S212: High-temperature vacuum melting: Perform high-temperature vacuum melting on the prepared metal powder to obtain a nickel-containing alloy melt; The vacuum degree of the above vacuum melting is 5×10 3 Pa, and the melting temperature is 1600 °C; and S213: Atomization powder making: Treat the nickel-containing alloy melt by argon atomization method, and obtain spherical atomized nickel-based superalloy powder after screening; The process parameters of the above argon atomization method treatment are atomization temperature 1680 °C, atomization pressure 0.3 bar, inlet flow rate 45 mL / min, 99.99% high-purity Ar; S214: Wet mixing and blending: Add the spherical atomized nickel-based superalloy powder and the modified boron nitride mixed powder into ethanol, stir magnetically at 1000 r / min for 3 h, then place it in an ultrasonic treatment at 50 KHz for 2 h to obtain an ethanol suspension; filter, take the insoluble matter, place it in a drying oven at 80 °C for drying treatment for 2 h to obtain a mixed powder.

[0061] S22: Hot working; that is S221: Hot isostatic pressing treatment: Place the mixed powder in a stainless steel sleeve, reserve a certain space, perform degassing treatment, and then place it in a hot isostatic press to sinter into a rod blank; The above degassing treatment process is that the furnace temperature is maintained at 660 °C, the vacuum degree <0.1 Pa, and it is maintained for 8 h; the above sintering process is to heat up to 1220 °C at a heating rate of 25 °C / min, then apply a gas pressure of 180 MPa to the surface, and keep it for 6 h under constant pressure and constant temperature and cool with the furnace to obtain a cylindrical powder sintered rod blank.

[0062] S222: Forging and rolling: Forge and roll the rod blank to prepare an alloy wire rod; The forging process is to open-die forge into alloy blank I at 900 °C, the forging ratio is 4, temper and heat at 950 °C for 2 h, then forge into alloy blank II at 1000 °C, the forging ratio is 6, and then forge into alloy blank III at 1000 °C, the forging ratio is 4; The rolling process is to keep warm at 1000 °C for 1.5 h and hot roll into a Φ5.0 mm alloy wire rod at 950 °C.

[0063] S223: Drawing-annealing: Perform multi-pass drawing-annealing on the alloy wire rod; Add a lubricant before drawing, perform 6-pass drawing processing to obtain a Φ1.5 mm alloy wire; The annealing is vacuum annealing, and the annealing temperature is 850 °C.

[0064] S23: Heat treatment; that is S231: Solution treatment; The above solution treatment is a multi-step grading treatment; specifically, in a nitrogen environment, heat to 950 °C, hold for 3 h, continue to heat to 1170 °C, hold for 2 h, and rapidly water quench to obtain a solution-treated alloy; S232: Aging treatment; The above aging treatment is a multi-step grading treatment; specifically, heat to 800 °C, hold for 8 h, air cool, then heat to 750 °C, hold for 15 h, and air cool.

[0065] S24: Surface treatment; that is The alloy wire is pickled; coated.

[0066] S25: Plating; that is Plating is carried out on the surface to obtain the target product.

[0067] Example 3 This example provides a high-strength high-temperature nickel-based alloy welding material, including the following powder raw materials in parts by weight: C: 0.05%, Si: 0.10%, Cr: 22.0%, Fe: 9.0%, Co: 4.0%, W: 4.0%, Mo: 3.0%, B: 0.005%, total amount of Al + Ti: 2.5%, Zr: 0.08%, Nb: 2.5%, RE: 0.40%, S: 0.002%, P: 0.002%, modified boron nitride mixed powder: 1.5%, balance Ni.

[0068] The total weight ratio of the above Al to Ti is 1:1.2.

[0069] The above RE is Y.

[0070] The preparation method of the above modified boron nitride mixed powder is the same as that in Specific Example 1.

[0071] Another object of this example is to provide a preparation method of a high-strength high-temperature nickel-based alloy welding material, including the following steps: S21: Raw material preparation; that is S211: Raw material ratio: Under argon protection, prepare the original metal powder except for the modified boron nitride mixed powder; S212: High-temperature vacuum melting: Vacuum melt the prepared metal powder to obtain a nickel-containing alloy melt; The above vacuum melting has a vacuum degree of 8×10 3 Pa, and the melting temperature is 1420 °C; and S213: Atomization powder making: Treat the nickel-containing alloy melt by argon atomization method, and obtain spherical atomized nickel-based superalloy powder after screening; The above process parameters for argon atomization are as follows: atomization temperature 1720 °C, atomization pressure 0.3 bar, inlet flow rate 55 mL / min, 99.99% high-purity Ar; S214: Wet blending: Add spherical atomized nickel-based superalloy powder and modified boron nitride mixed powder to ethanol, stir magnetically at 1000 r / min for 3 h, then place it in an ultrasonic treatment at 50 KHz for 2 h to obtain an ethanol suspension; filter, take the insoluble matter, place it in a drying oven at 80 °C for drying treatment for 2 h to obtain a mixed powder.

[0072] S22: Hot working; that is S221: Hot isostatic pressing treatment: Place the mixed powder in a stainless steel sleeve, reserve a certain space, carry out degassing treatment, and then place it in a hot isostatic press to sinter into a bar blank; The above degassing treatment process is that the furnace temperature is maintained at 700 °C, the vacuum degree <0.1 Pa, and it is maintained for 6 h; the above sintering process is to heat up to 1280 °C at a heating rate of 25 °C / min, then apply a gas pressure of 120 MPa to the surface, and keep it under constant pressure and constant temperature for 4 h and cool with the furnace to obtain a cylindrical powder sintered bar blank.

[0073] S222: Forging and rolling: Forge and roll the bar blank to prepare an alloy wire rod; The forging process is as follows: at 950 °C, the ingot is forged into alloy blank I, the forging ratio is 3, after tempering and heating at 1000 °C for 1 h, it is forged into alloy blank II at 1050 °C, the forging ratio is 5, and then forged into alloy blank III at 1050 °C, the forging ratio is 3; The rolling process is to keep it at 1050 °C for 0.5 h and hot roll it into a Φ4.0 mm alloy wire rod at 1100 °C.

[0074] S223: Drawing-annealing: Carry out multi-pass drawing-annealing on the alloy wire rod; Add a lubricant before drawing, carry out 8-pass drawing processing to obtain a Φ1.0 mm alloy wire; The annealing is vacuum annealing, and the annealing temperature is 950 °C.

[0075] S23: Heat treatment; that is S231: Solution treatment; The above solution treatment is multi-step grading treatment; specifically, in a nitrogen environment, heat it to 1000 °C, keep it warm for 2 h, continue to heat it to 1120 °C, keep it warm for 3 h, and quickly water quench to obtain a solution-treated alloy; S232: Aging treatment; The above aging treatment is multi-step grading treatment; specifically, heat it to 850 °C, keep it warm for 3 h, air cool, then heat it to 770 °C, keep it warm for 10 h, and air cool.

[0076] S24: Surface treatment; that is Pickle the alloy wire; coating.

[0077] S25: Plating layer; that is Perform plating on the surface to obtain the target product.

[0078] Example 4 The others are the same as Example 1, the difference is that: In a high-strength high-temperature nickel alloy welding consumable formula, The total weight ratio of Al to Ti is 1:0.8.

[0079] Example 5 The others are the same as Example 1, the difference is that: In a high-strength high-temperature nickel alloy welding consumable formula, The total weight ratio of Al to Ti is 1:1.5.

[0080] Example 6 The others are the same as Example 1, the difference is that: In a high-strength high-temperature nickel alloy welding consumable formula, RE is Ce.

[0081] Example 7 The others are the same as Example 1, the difference is that: In a high-strength high-temperature nickel alloy welding consumable formula, RE is Sm.

[0082] Example 8 The others are the same as Example 1, the difference is that: In a high-strength high-temperature nickel alloy welding consumable formula, The preparation method of the modified boron nitride mixed powder includes the following steps: S11, Add boron nitride to absolute ethanol and ultrasonically vibrate for 20 min to obtain a boron nitride dispersion; The dosage ratio of the above boron nitride to absolute ethanol is 5.0 g:50 mL.

[0083] S12, Add the active metal powder, boron nitride dispersion, and absolute ethanol to a ball mill, adjust the ball milling speed to 300 r / min, the ball milling duration is 12 h (stop for 0.25 h every 1 h), and the ball-to-material mass ratio is 10:1; The dosage ratio of the above active metal powder to boron nitride is 100 g:5.0 g; The dosage ratio of the above active metal powder to absolute ethanol is 100 g:100 mL; and The above active metal powder is a mixture of aluminum powder and titanium powder.

[0084] S13. After ball milling, it is placed in an 80°C drying oven for drying treatment for 2 hours to obtain the modified boron nitride mixed powder.

[0085] Example 9 The others are the same as in Example 1, except that: In a high-strength and high-temperature nickel alloy welding consumable formula, The preparation method of the modified boron nitride mixed powder includes the following steps: S11. Add boron nitride to absolute ethanol and ultrasonically vibrate for 20 minutes to obtain a boron nitride dispersion; The dosage ratio of the above boron nitride to absolute ethanol is 1.0 g: 50 mL.

[0086] S12. Add the active metal powder, boron nitride dispersion, and absolute ethanol to a ball mill, adjust the ball milling speed to 200 r / min, the ball milling duration to 18 hours (stop for 0.25 hours every 1 hour), and the ball-to-material mass ratio to 8:1; The dosage ratio of the above active metal powder to boron nitride is 100 g: 1.0 g; The dosage ratio of the above active metal powder to absolute ethanol is 100 g: 100 mL; and The above active metal powder is a mixture of aluminum powder and titanium powder.

[0087] S13. After ball milling, it is placed in an 80°C drying oven for drying treatment for 2 hours to obtain the modified boron nitride mixed powder.

[0088] Example 10 The others are the same as in Example 1, except that: A high-strength and high-temperature nickel alloy welding consumable includes the following powder raw materials in parts by weight: C: 0.04%, Si: 0.15%, Cr: 20.0%, Fe: 8.0%, Co: 5.0%, W: 3.0%, Mo: 4.5%, B: 0.008%, total amount of Al + Ti: 2.5%, Zr: 0.06%, Nb: 2.33%, RE: 0.36%, S: 0.002%, P: 0.002%, modified boron nitride mixed powder: 2.0%, balance Ni.

[0089] The total weight ratio of the above Al to Ti is 1:1.2.

[0090] The above RE is Y.

[0091] The preparation method of the above modified boron nitride mixed powder, In S11, the dosage ratio of boron nitride to absolute ethanol is 4.5 g: 50 mL.

[0092] In S12, the dosage ratio of the above active metal powder to boron nitride is 100 g: 4.5 g; and The above active metal powder is titanium powder.

[0093] Example 11 Others are the same as Example 1, the difference is that: A high-strength and high-temperature nickel alloy welding material, comprising the following powder raw materials in parts by weight: C: 0.04%, Si: 0.15%, Cr: 20.0%, Fe: 8.0%, Co: 5.0%, W: 3.0%, Mo: 4.5%, B: 0.008%, total amount of Al+Ti: 2.5%, Zr: 0.06%, Nb: 2.33%, RE: 0.36%, S: 0.002%, P: 0.002%, modified boron nitride mixed powder: 2.0%, balance Ni.

[0094] The total weight ratio of the above Al to Ti is 1:1.2.

[0095] The above RE is Y.

[0096] The preparation method of the above modified boron nitride mixed powder, In S11, the dosage ratio of boron nitride to absolute ethanol is 4.5 g: 50 mL.

[0097] In S12, the dosage ratio of the above active metal powder to boron nitride is 100 g: 4.5 g; and The above active metal powder is aluminum powder.

[0098] The following comparative examples are all compared with Example 1: Comparative Example 1 Others are the same as Example 1, the difference is that: In a high-strength and high-temperature nickel alloy welding material formula, The weight ratio of Al to Ti is 1:0.5.

[0099] Comparative Example 2 Others are the same as Example 1, the difference is that: In a high-strength and high-temperature nickel alloy welding material formula, The weight ratio of Al to Ti is 1:2.0.

[0100] Comparative Example 3 Others are the same as Example 1, the difference is that: In a high-strength and high-temperature nickel alloy welding material formula, The weight fraction of RE is 0; that is, RE is not added.

[0101] Comparative Example 4 The others are the same as in Example 1, except that: In a high-strength and high-temperature nickel-based alloy welding material formulation, the weight fraction of the modified boron nitride mixed powder is 2.91%; that is, no modified boron nitride is added.

[0102] Implement Comparative Example 5 The others are the same as in Example 1, except that: In a high-strength and high-temperature nickel-based alloy welding material formulation, the modified boron nitride mixed powder is replaced with a mixture of boron nitride and active metal powder; that is, no ball milling treatment is carried out.

[0103] Implement Comparative Example 6 The others are the same as in Example 1, except that: In a high-strength and high-temperature nickel-based alloy welding material formulation, For the preparation method of the modified boron nitride mixed powder, in S12, the dosage ratio of the active metal powder to boron nitride is 50 g: 3.0 g.

[0104] Implement Comparative Example 7 The others are the same as in Example 1, except that: In a preparation method of a high-strength and high-temperature nickel-based alloy welding material, in S21, weigh according to the mass percentage of the formulation and mix to obtain nickel-based superalloy powder; that is, no argon atomization treatment is carried out.

[0105] Implement Comparative Example 8 The others are the same as in Example 1, except that: In a preparation method of a high-strength and high-temperature nickel-based alloy welding material, in S214, weigh according to the mass percentage of the formulation and mix to obtain a mixed powder; that is, no wet mixing method treatment is carried out.

[0106] Respectively use the high-strength and high-temperature nickel-based alloy welding materials prepared in the above examples and comparative examples as filler metals for the welding of IN939 nickel-based cast superalloy to obtain deposited metals. Among them, the welding conditions are: welding current 70 A, welding voltage 8 V, welding speed 0.9 mm / s.

[0107] Respectively measure the physical properties of the high-strength and high-temperature nickel-based alloy welding materials and deposited metals prepared in the examples and comparative examples of the present invention, and the results are shown in Table 1.

[0108] Table 1 Physical test properties of each example Example Cracking resistance Room temperature hardness / HV Yield strength (900 °C) / MPa Tensile strength (900 °C) / MPa High temperature durability (1000 °C * 300 MPa) / h Example 1 OK 378 581 796 267 Example 2 OK 347 565 754 258 Example 3 OK 362 544 735 243 Example 4 OK 343 567 748 254 Example 5 OK 349 572 761 259 Example 6 OK 334 576 773 255 Example 7 OK 330 570 767 252 Example 8 OK 382 586 702 263 Example 9 OK 336 511 710 221 Example 10 OK 365 568 759 252 Example 11 OK 369 573 774 249 Comparative example 1 NG 297 498 683 210 Comparative example 2 NG 286 489 668 198 Comparative example 3 NG 288 451 606 174 Comparative example 4 OK 279 416 553 98 Comparative example 5 NG 314 423 560 111 Comparative example 6 OK 335 517 684 223 Comparative example 7 NG 273 402 531 124 Comparative example 8 NG 310 434 611 172 It can be observed from Examples 1-12 that the high-strength high-temperature nickel alloy welding materials of the present invention have excellent high-temperature mechanical properties and hardness; at the same time, they have excellent surface properties, etc.; in addition, from Example 1 and Comparative Examples 10-11 (calculated according to the formula, the difference is only the type of active metal powder used for modification), it can be observed that the modified boron nitride mixed powder prepared by co-modifying boron nitride with titanium and aluminum has better effects than single active metal modification.

[0109] It can be observed from Example 1 and Comparative Examples 1-3 that appropriate amounts of Al and Ti in the high-strength high-temperature nickel alloy welding materials of the present invention and appropriate ratios have a certain strengthening and toughening effect on the alloy; RE can purify grain boundaries and improve the high-temperature strength and other properties of the alloy; It can be observed from Example 1 and Comparative Examples 4-6 that the modified boron nitride mixed powder has good high-temperature mechanical properties, etc.; at the same time, it can be observed that an appropriate preparation method of the modified boron nitride mixed powder is beneficial to improving the comprehensive performance of the final nickel alloy welding material; It can be observed from Example 1 and Comparative Examples 7-8 that the manufacturing process has an important influence on nickel-based alloy welding wires. The argon atomization method improves the purity of each metal powder from the initial stage and improves the performance; the wet mixing method has better dispersibility and thus better mechanical properties.

[0110] In summary, the high-strength high-temperature nickel alloy welding materials of the present invention have excellent hardness, excellent high-temperature heat resistance, etc., and can meet the welding use requirements of high-temperature nickel-based alloys.

[0111] The test methods are as follows: (1) Crack resistance: Observe whether there are visible cracks in the weld strip. If the specimen is intact after bending or the length of a single crack ≤ 1.5 mm, it is recorded as "OK"; otherwise, if there are visible cracks and the length of a single crack > 1.5 mm after bending, it is recorded as "NG".

[0112] (2) Hardness. Measured using a microhardness tester (HXS 1000A) with a load of 30 kgf and a loading time of 15 s. Five points are tested for each specimen, and the arithmetic mean is taken to obtain the hardness value (HV30).

[0113] (3) Mechanical property test: The high-temperature mechanical properties of the welded joint are tested at 900 °C in accordance with GB / T2651 2008 "Test Method for Tensile Test of Welded Joints".

[0114] (4) High-temperature endurance: Tested according to the method described in HB 5150-1996.

[0115] Taking the above-mentioned ideal embodiments of the present invention as an inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A high-strength and high-temperature nickel alloy welding material, characterized in that: The powder raw materials include the following parts by weight: C: 0.02-0.05%, Si: 0.10-0.20%, Cr: 18.0-22.0%, Fe: 7.0-9.0%, Co: 4.0-6.0%, W: 2.0-4.0%, Mo: 3.0-6.0%, B: 0.005-0.010%, total amount of Al+Ti: 0.5-2.5%, Zr: 0.05-0.08%, Nb: 2.0-2.5%, RE: 0.30-0.40%, S: <0.005%, P: <0.005%, modified boron nitride mixed powder: 1.5-4.0%, Ni balance.

2. The high-strength and high-temperature nickel alloy welding material according to claim 1, characterized in that: The total weight ratio of Al to Ti is 1:(0.8-1.5).

3. The high-strength and high-temperature nickel alloy welding material according to claim 1, characterized in that: The RE is Y, Ce or Sm.

4. The high-strength and high-temperature nickel alloy welding material according to claim 1, characterized in that: The method for preparing the modified boron nitride mixed powder comprises the following steps: S11, preparing a boron nitride dispersion; S12, adding active metal powder into boron nitride dispersion for ball milling; S13, after the ball milling is completed, drying is performed to obtain a modified boron nitride mixed powder.

5. The high-strength and high-temperature nickel alloy welding material according to claim 4, characterized in that: The usage ratio of the boron nitride to the active metal powder is 1.0-5.0g:100g.

6. A high-strength and high-temperature nickel alloy welding material according to claim 4 or 5, characterized in that: The boron nitride has a lamellar structure and a size of 50-80 nm; and The active metal powder is aluminum powder and / or titanium powder, and the particle size is 30-50 μm.

7. A method for preparing a high-strength and high-temperature nickel alloy welding material as claimed in claim 1, characterized in that: The following steps are involved: S21: Raw material preparation; i.e. S211: Raw material ratio: under argon protection, prepare the original metal powder except the modified boron nitride mixed powder; S212: high temperature vacuum melting: subjecting the prepared metal powder to high temperature vacuum melting to obtain a nickel-containing alloy melt; S213: atomization powder making: treating the nickel-containing alloy melt by argon atomization method, and obtaining spherical atomized nickel-based high-temperature alloy powder after screening; S214: Wet mixing: adding spherical atomized nickel-based high-temperature alloy powder and modified boron nitride mixed powder into ethanol, ultrasonically treating to obtain an ethanol suspension; drying to obtain a mixed powder; S22: Hot working; i.e. S221: Hot isostatic pressing: The mixed powder is placed in a stainless steel sleeve and a certain space is reserved for degassing, and then placed in a hot isostatic press to sinter into a rod blank; S222: Forging and rolling: forging and rolling the bar billet to prepare an alloy wire rod; S223: Drawing-annealing: performing multiple passes of drawing-annealing on the alloy wire rod; S23: Heat treatment; i.e. S231: solution treatment; S232: Aging treatment; S24: Surface treatment; i.e. The alloy wire is pickled; coated; S25: coating; i.e. A coating is performed on the surface to obtain the target product.

8. The method for preparing a high-strength and high-temperature nickel alloy welding material according to claim 7, characterized in that: The average particle size of the original metal powder in S211 is 50-100 μm; The vacuum degree of vacuum melting in S212 is 5×10 3 -8×10 3Pa，熔炼温度为1420-1600℃；以及 The process parameters of the argon atomization treatment in S213 are: atomization temperature 1680-1720°C, atomization pressure 0.3 bar, flow rate 45-55 mL / min, and 99.99% high-purity Ar.

9. Application of the high-strength high-temperature nickel alloy welding material according to claim 1 in welding of nickel-based cast high-temperature alloys.