A high-temperature creep-resistant nickel-based welding alloy material containing rare earth elements and a preparation method thereof

Abstract

The application belongs to the field of metal material processing, and particularly relates to a high-temperature creep-resistant nickel-based welding alloy material containing rare earth elements and a preparation method thereof. The welding alloy material comprises a welding wire and a coating. The welding wire comprises the following powder raw materials in parts by weight: C: 0.03-0.08%, Si: 0.10-0.40%, Cr: 20.0-23.0%, Fe: 7.0-10.0%, Mn: 0.8-1.2%, Mo: 4.0-5.0%, B: 0.001-0.005%, Al+Ti: 0.1-0.2%, Nb: 1.0-2.0%, Ta: 0.1-0.4%, Sn: 0.5-1.0%, rare earth nucleating agent: 0.20-0.35%, Cu: 0.5-1.0%, S: <0.005%, P: <0.005%, and Ni: the balance. The welding wire raw material is treated by high-temperature vacuum melting-atomization powdering-wet mixing method blending-hot isostatic pressing, and is subjected to multi-pass drawing-annealing and solid solution-aging treatment, and finally is prepared by pickling, coating and plating, so that the problem that the deposited metal of the nickel-based welding alloy material in the prior art is prone to creep at high temperature and affects the service life can be effectively solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of metal materials, and particularly relates to a high-temperature creep-resistant nickel-based welding alloy material containing rare earth elements and a preparation method thereof. BACKGROUND

[0002] Heat-resistant alloys can maintain their original mechanical properties when serving in high-temperature environments (generally 650-1315 DEG C), can withstand high-temperature oxidation corrosion for a long time, and will not appear fatigue, creep, fracture and corrosion failure too fast. Therefore, heat-resistant alloys are widely used in petrochemical industry, metallurgical manufacturing, aerospace, national defense and military industry and other industries. As the main element of high-temperature alloy materials, nickel is a rare alloy element that can improve the strength of alloy materials without significantly weakening the plasticity of materials, and has excellent high-temperature resistance, oxidation resistance and corrosion resistance. The importance of nickel-based high-temperature alloy, an indispensable high-temperature structural material, is self-evident.

[0003] The design, manufacture and installation of large equipment involve the collaborative work of multiple departments. Because the structure of high-temperature alloy structural parts is becoming more and more complex, the precision is becoming higher and higher, and the manufacturing difficulty is increasing. The final structure cannot be realized by precision casting alone, and must be combined with reliable welding technology and other advanced processing and manufacturing technologies to realize the split casting of high-temperature alloy structural parts. In addition, the melting welding method not only can realize the connection of high-temperature alloy structural parts, but also can realize the repair of defects, effectively improving the working reliability and economy of high-temperature alloy structural parts. From the perspective of matching the composition of welding materials, the welding materials matched with the composition of the base material can not only realize the matching of the mechanical properties with the base material, but also take into account the economy. Therefore, this type of welding material has better application prospects.

[0004] The welding of nickel alloy has the following problems: nickel-based high-temperature alloy is prone to crack during fusion welding, and has poor weldability. The welding position of the nickel-based high-temperature alloy structural part must have excellent creep resistance and cannot have welding defects. Cracks can be caused by the mixing of sulfur, lead, phosphorus or low-melting-point metals during welding, the over-heating of the weld joint due to large welding heat input, and the generation of pores during welding, resulting in poor service life. In addition, the deposited metal of the welding material is prone to interphase relative slip at high temperature, resulting in creep and material failure, which poses a great safety hazard and a huge economic cost to large high-temperature equipment. Therefore, it is urgent to develop a high-temperature creep-resistant nickel-based welding alloy material to meet the welding requirements of high-temperature alloy parts. SUMMARY

[0005] The present application aims at the problem of easy creep of the deposited metal of the nickel-based welding alloy material in the prior art at high temperature, affecting the service life, and provides a novel high-temperature creep-resistant nickel-based welding alloy material containing rare earth elements and a preparation method thereof; the novel material is designed and optimized by formula, and can effectively solve the above problems.

[0006] The present application provides a high-temperature creep-resistant nickel-based welding alloy material containing rare earth elements, which comprises the following powder raw materials in parts by weight: C: 0.03-0.08%, Si: 0.10-0.40%, Cr: 20.0-23.0%, Fe: 7.0-10.0%, Mn: 0.8-1.2%, Mo: 4.0-5.0%, B: 0.001-0.005%, Al+Ti: 0.1-0.2%, Nb: 1.0-2.0%, Ta: 0.1-0.4%, Sn: 0.5-1.0%, rare earth nucleating agent: 0.20-0.35%, Cu: 0.5-1.0%, S: <0.005%, P: <0.005%, and Ni: the balance.

[0007] Further, the total amount of the above Cr and Mo is not less than 25.0%.

[0008] Further, the weight ratio of the above Al and Ti is (2.0-4.0): 1.

[0009] Further, the preparation method of the above rare earth nucleating agent comprises the following steps:

[0010] S11, surface oxidation treatment is performed on one-dimensional nanomaterials and two-dimensional nanomaterials to obtain oxidized nanomaterials;

[0011] S12, ball milling treatment is performed on the oxidized nanomaterials and rare earth metals to obtain a rare earth nucleating agent.

[0012] Further, the weight ratio of the above one-dimensional nanomaterials and two-dimensional nanomaterials is 0.5-3.0 g: 1.0 g.

[0013] Further, the weight ratio of the above oxidized nanomaterials and rare earth metals is 1 g: 10.0-20.0 g; and

[0014] The above rare earth metal includes Y.

[0015] Another object of the present application is to provide a preparation method of a high-temperature creep-resistant nickel-based welding alloy material containing rare earth elements, comprising the following steps:

[0016] S21: raw material proportioning: under argon protection, raw metal powders except for a rare earth nucleating agent are prepared;

[0017] S22: high-temperature vacuum smelting: the prepared metal powder is subjected to high-temperature vacuum smelting to obtain a nickel-containing alloy melt;

[0018] S23: atomization powdering: the nickel-containing alloy melt is treated by an argon atomization method, and after screening, spherical atomized nickel-based high-temperature alloy powder is obtained;

[0019] S24: wet mixing method blending: the spherical atomized nickel-based high-temperature alloy powder and the rare earth nucleating agent are added into ethanol, ultrasonic treatment is performed to obtain an ethanol suspension, and drying treatment is performed to obtain a mixed powder;

[0020] S25: hot isostatic pressing treatment: the mixed powder is placed in a stainless steel sleeve with a certain space reserved, degassing treatment is performed, and then the mixed powder is placed in a hot isostatic pressing machine to sinter into a rod blank;

[0021] S26: forging and rolling: the rod blank is subjected to forging and rolling to prepare an alloy rod;

[0022] S27: solid solution and aging treatment;

[0023] S28: surface treatment; that is,

[0024] The alloy wire is subjected to pickling; and coating;

[0025] S29: plating; that is,

[0026] The plating is performed on the surface to obtain a target product.

[0027] Another object of the present application is to provide application of the high-strength high-temperature nickel alloy welding material in nickel-based cast high-temperature alloy welding.

[0028] The present application has the following beneficial effects:

[0029] (1) The present application provides a high-temperature creep-resistant nickel-based welding alloy material containing rare earth elements, wherein Ni is used as the matrix in the welding wire structure, Cr can improve the high-temperature oxidation resistance and corrosion resistance of the alloy, Mo can refine the grains and improve the thermal stability of the alloy. At the same time, Cr and Mo can form carbides with C, and hard phases such as chromium carbide are dispersedly distributed in the solid solution strengthened matrix to improve the high-temperature strength and creep resistance; at the same time, the improvement of high-temperature oxidation resistance and high-temperature strength can effectively inhibit the welding porosity caused by oxidation, and can effectively improve the welding strength.

[0030] (2) The application provides a high-temperature creep-resistant nickel-based welding alloy material containing rare earth elements. A certain amount of Al and Ti elements are added in the welding wire alloy. On the one hand, Al and Ti can improve the weldability of the alloy, and have strong affinity with oxygen, can be used as deoxidizing elements to protect the weld oxidation, thereby effectively inhibiting the formation of CO and N2 pores, and facilitating the formation of the weld; on the other hand, most of the Al elements form Ni3Al with Ni elements for precipitation strengthening; at the same time, the addition of Al elements also increases the misfit degree of γ' / γ two phases, causes the enhancement of the coherent strain field around the γ' phase, thereby increasing the strengthening effect and improving the high-temperature creep resistance.

[0031] (3) The application provides a high-temperature creep-resistant nickel-based welding alloy material containing rare earth elements. A certain amount of rare earth nucleating agents are added in the alloy, which are a mixture of one-dimensional and two-dimensional nanomaterials modified by rare earth. First, the rare earth has a large radius and a special electron cloud structure, can fill the surface defects of the alloy phase, preferentially segregates at the interface between the new phase and the old phase, plays a wetting role, reduces the interfacial tension, makes the new phase and the matrix combine more closely, helps the better spreading and combination of the weld filler metal, and improves the high-temperature strength and creep resistance; second, the two-dimensional nanomaterial has a super large specific surface area, effectively prevents the grain growth during heat treatment, has a fine-grain strengthening effect; at the same time, can increase the lattice distortion energy of the dislocation affected area, increase the sliding resistance; in addition, when the alloy is subjected to external force loading, the two-dimensional structure can bear mechanical load, improve the mechanical properties; it can effectively increase the high-temperature creep resistance, and has excellent high-temperature creep resistance; the one-dimensional nanomaterial has a super large aspect ratio, can cross the polycrystalline region, realize the series connection of the polycrystalline region, improve the sliding resistance, mechanical load and the like, thereby improving the high-temperature creep resistance; mixing one-dimensional and two-dimensional nanomaterials can effectively improve the high-temperature creep resistance and other mechanical properties; third, the wetting property of rare earth provides excellent compatibility between one-dimensional and two-dimensional nanomaterials and metals; at the same time, it is enriched at the phase interface, further improves the high-temperature creep resistance of the nickel-based welding alloy material; fourth, due to the high specific surface area of one-dimensional and two-dimensional nanomaterials, the rare earth modified by the one-dimensional and two-dimensional nanomaterials has excellent synergistic effect, and improves the comprehensive performance. DETAILED DESCRIPTION

[0032] The application will be described in detail below in combination with the embodiments. However, it should be understood that the following embodiments are only illustrative of the embodiments of the application, but not limit the scope of the application.

[0033] The purpose of the present application is to develop a rare earth element-containing high-temperature creep-resistant nickel-based welding alloy material to solve the problem of easy creep of the deposited metal of the existing nickel-based welding alloy material at high temperature, which affects the service life. The implementation idea is as follows: considering that the reason for the high-temperature creep of the deposited metal is that the relative sliding between the phases of the metal at high temperature leads to material failure; the problem of creep is fundamentally solved by adding an additive to hinder the relative sliding between the phases; self-made one-dimensional nanomaterials and two-dimensional nanomaterials are used, which are surface-modified with rare earth metals to improve their wettability and compatibility between metals; at the same time, the sliding resistance is improved by the compounding of one-dimensional materials and two-dimensional materials in various mechanisms such as grain refinement, increase of lattice distortion energy of dislocation area, load bearing, and series connection of polycrystalline regions, thereby improving the high-temperature creep resistance; and by formula design, Ni is used as the main component, and Cr, Mo and other high-temperature-resistant elements are added to achieve solid solution strengthening effect, improve the oxidation resistance and thermal strength, etc.; appropriate amounts of Mn and Si elements are added to improve the purity of the grain boundary and reduce the thermal brittleness; at the same time, precipitation strengthening elements such as Al, Ti and Ta are added to improve the high-temperature strength and purify the grain boundary; finally, a plating process is carried out on the alloy wire to comprehensively improve the mechanical properties and high-temperature creep resistance. The implementation of the present application is as follows:

[0034] The present application provides a rare earth element-containing high-temperature creep-resistant nickel-based welding alloy material, which comprises the following powder raw materials in parts by weight: C: 0.03-0.08%, Si: 0.10-0.40%, Cr: 20.0-23.0%, Fe: 7.0-10.0%, Mn: 0.8-1.2%, Mo: 4.0-5.0%, B: 0.001-0.005%, Al+Ti: 0.1-0.2%, Nb: 1.0-2.0%, Ta: 0.1-0.4%, Sn: 0.5-1.0%, rare earth nucleating agent: 0.20-0.35%, Cu: 0.5-1.0%, S: <0.005%, P: <0.005%, and Ni in the balance.

[0035] The total amount of Cr and Mo is not less than 25.0%.

[0036] Cr element is the main element for ensuring the high-temperature oxidation resistance of the alloy, which forms a dense Cr2O3 protective layer on the surface of the base material to resist oxidation and corrosion; however, the addition of Cr reduces the γ' phase dissolution temperature, and excessive addition of Cr also destroys the γ'+γ microstructure. Therefore, the Cr content in the present application is controlled at 20.0-23.0%.

[0037] Mo element can improve high temperature strength and improve the corrosion resistance of the alloy, especially in the case of Cr complex effect, the pitting resistance is more excellent; meanwhile Mo enhances the creep resistance of the alloy through solid solution strengthening. The addition of Mo can significantly improve the corrosion resistance, high temperature strength and creep resistance of the welding material. Therefore, the Mo content is controlled at 4.0-5.0%.

[0038] Meanwhile, considering the compounding effect of Cr and Mo, the total amount is not less than 25.0%.

[0039] The weight ratio of the above-mentioned Al and Ti is (2.0-4.0):1.

[0040] Al and Ti can improve the weldability of the alloy, can be used as deoxidizing elements, are beneficial to the formation of the weld, have certain strengthening and toughening effects on the alloy. Meanwhile, Al generates Al2O3 in the high temperature oxidation process of the alloy, and the structure of the oxide is beneficial to improving the high temperature oxidation resistance of the alloy; the addition of Al element also increases the misfit degree of γ' / γ two phases, causes the enhancement of the coherent strain field around the γ' phase, thereby increasing the strengthening effect and having the creep resistance. However, too high Al and Ti contents will affect the hot workability and weldability, and the formed oxide is easy to cause slag inclusion in the weld, reduces the thermal cracking resistance, and too high Al+Ti content will form γ, γ' and other second phase precipitates, reduces the high temperature stress rupture performance strengthening effect, and induces the precipitation of harmful phase σ phase. Comprehensive consideration is given, and the Al+Ti content is controlled at 0.1-0.2%, and the weight ratio of Al and Ti is (2.0-4.0):1.

[0041] The preparation method of the rare earth nucleating agent comprises the following steps:

[0042] S11, one-dimensional nanomaterials and two-dimensional nanomaterials are added to a mixed solution of concentrated nitric acid and concentrated sulfuric acid, ultrasonic dispersion is carried out at room temperature for 4-8h, then the temperature is increased to 60-80℃, reflux is carried out for 1-4h, most of the acid is removed by centrifugation, then filtration is carried out, the insoluble matter is washed to neutral with deionized water, and vacuum drying is carried out at 60℃ for 12h to obtain oxidized nanomaterials.

[0043] The total amount of the one-dimensional nanomaterials and the two-dimensional nanomaterials is 1g, and the amount of concentrated nitric acid and concentrated sulfuric acid is 30mL:90mL;

[0044] The weight ratio of the one-dimensional nanomaterials and the two-dimensional nanomaterials is 0.5-3.0g:1.0g.

[0045] The one-dimensional nanomaterials are carbon nanotubes or carbon nanofibers; and preferably carbon nanotubes;

[0046] The average tube diameter of the carbon nanotube is 10-30 nm, and the length-diameter ratio is > 500; and in the following examples and comparative examples of the present application, the carbon nanotube is CT-M-001, which is purchased from Jiangsu Chaocan Xianfeng Technology Co., Ltd.

[0047] The two-dimensional nanomaterial is graphene, boron nitride or silicon carbide; and preferably, the two-dimensional nanomaterial is graphene.

[0048] The graphene has a thickness of 3-10 nm and a flake diameter of 5-10 μm; and in the following examples and comparative examples of the present application, the graphene has a product number of 100078, which is purchased from Jiangsu Xianfeng Nanomaterials Technology Co., Ltd.

[0049] S12, the oxidized nanomaterial is added to anhydrous ethanol A and ultrasonically shaken for 20 min to obtain a dispersion; the dispersion, the rare earth metal, and anhydrous ethanol B are added to a ball mill for ball milling treatment for 12-18 h, then filtered, and the insoluble substance is taken out and placed in a vacuum dryer at 60°C for 12 h to obtain a rare earth nucleating agent.

[0050] The amount ratio of the oxidized nanomaterial, anhydrous ethanol A, the rare earth metal, and anhydrous ethanol B is 1 g:20 mL:10.0-20.0 g:30 mL.

[0051] The ball milling treatment has a rotation speed of 200-300 r / min, and the mass ratio of the ball to the material is 8-10:1.

[0052] The rare earth metal is Y and other rare earth metals in a weight ratio of 1 g:0-0.5 g, and has a particle size of 30-50 μm.

[0053] The other rare earth metals can be Ce, Sm, or Gd, etc.

[0054] The rare earth nucleating agent in the present application can provide a large number of heterogeneous nucleation cores for the formation of grains during alloy smelting, so that the grains are more easily nucleated, thereby refining the grains. During the processing of the alloy, such as cold rolling, cold drawing, etc., a large number of dislocations are introduced, which can hinder subsequent deformation to some extent, thereby improving the strength and creep resistance of the alloy. During the heat treatment process, a special precipitate containing rare earth is introduced, which has a unique crystal structure and chemical property, and can act as an obstacle to hinder the movement of dislocations, thereby improving the creep resistance of the alloy.

[0055] Meanwhile, due to the good wettability of the rare earth, the one-dimensional rare earth nucleating agent and the two-dimensional rare earth nucleating agent are enriched at the phase interface, and the high-temperature creep resistance is improved through the mechanisms of refining the grains, increasing the lattice distortion energy of the dislocation area, bearing the load, and the polycrystalline area in series anti-slipping.

[0056] In addition, other important components and functions in the examples of the present application are as follows:

[0057] Mn can interact with other elements to increase the creep resistance and oxidation resistance of the alloy. And can fix sulfur to generate MnS, reduce the grain boundary embrittlement; Especially in high temperature environment, the addition of Mn can effectively inhibit the grain growth of the alloy, so that the alloy maintains a fine grain structure, thereby improving the strength and plasticity of the alloy; But too high content exists weak crystallization crack and high temperature plastic crack tendency. Therefore, the content of Mn in the application is controlled at 0.8-1.2%.

[0058] Si as a deoxidizer, can improve the purity of the weld, reduce defects, improve the strength of the weld, and reduce the tendency of solidification crack; But too high content exists to cause the weld metal to become brittle, reduce plasticity and toughness. Therefore, the content of Si in the application is controlled at 0.1-0.2%.

[0059] Fe in nickel-based alloy also mainly plays a solid solution strengthening role, and replacing Ni element can reduce the cost, and Fe can also make the stacking layer sequence of the gamma matrix decrease, which has a positive effect on the improvement of yield strength. Therefore, the content of Fe in the application is controlled at 7.0-10.0%.

[0060] Nb is a strengthening element in high temperature environment, which can increase the lattice distortion and lattice atomic bond of solid solution, so that the matrix is strengthened, and the solid solution strengthening effect is more significant; At the same time, it is also a strong carbide forming element, which can form MC, M6C or M2C type carbide, which has a significant second phase strengthening effect on the weld metal, and improves the creep resistance; In addition, it can also reduce the segregation of alloy elements and improve the plasticity of weld metal, but the content needs to be controlled to prevent the precipitation of Laves phase. Therefore, the content of Nb in the application is controlled at 1.0-2.0%.

[0061] Adding a small amount of B element strengthens the grain boundary and improves the stress rupture strength of the weld deposit metal, and a small amount of addition will not increase the sensitivity of welding hot crack.

[0062] Low melting point Sn can fill the grain boundary microcrack and improve the healing ability, but excessive amount will cause brittleness. Therefore, the content of Sn in the application is controlled at 0.5-1.0%.

[0063] Cu is an austenite forming element, which can inhibit the formation of delta ferrite in the weld, in addition, like M23C6 type carbide, it can prevent the migration of subgrain boundary during long-term creep and improve the creep strength, therefore, the content of Cu in the application is controlled at 0.5-1.0%.

[0064] Another purpose of the embodiment of the application is to provide a preparation method of a high-temperature creep-resistant nickel-based welding alloy material containing rare earth elements, comprising the following steps:

[0065] S21: Raw material proportioning: under argon protection, prepare the original metal powder except the rare earth nucleating agent;

[0066] The average particle size of the original metal powder is 50-100 μm;

[0067] S22: high-temperature vacuum smelting: the prepared metal powder is subjected to high-temperature vacuum smelting to obtain a nickel-containing alloy melt;

[0068] The vacuum degree of the vacuum smelting is 5x10 3 -8x10 3Pa，熔炼温度为1420-1600℃；

[0069] S23: atomization powdering: the nickel-containing alloy melt is treated by argon atomization method, and after screening, spherical atomized nickel-based high-temperature alloy powder is obtained;

[0070] The process parameters of the argon atomization method are as follows: atomization temperature 1680-1720℃, atomization pressure 0.3 bar, flow rate 45-55 mL / min, and 99.99% high-purity Ar.

[0071] S24: wet mixing method blending: the spherical atomized nickel-based high-temperature alloy powder and the rare earth nucleating agent are added into ethanol, and after being stirred at 1000 r / min for 3 h, they are subjected to ultrasonic treatment at 50 KHz for 2 h to obtain an ethanol suspension; the insoluble substance is filtered and dried in a 80℃ drying box for 2 h to obtain a mixed powder;

[0072] S25: hot isostatic pressing treatment: the mixed powder is placed in a stainless steel sleeve with a certain space reserved, degassed, and then sintered into a rod blank in a hot isostatic pressing machine;

[0073] The degassing process is as follows: the furnace temperature is kept at 660-700℃, the vacuum degree is <0.1 Pa, and the holding time is 6-8 h; the sintering process is as follows: the heating rate is 25℃ / min, the temperature is raised to 1220-1280℃, then a gas pressure of 120-180 MPa is applied to the surface, and the temperature is kept constant for 4-6 h, and the rod blank is cooled in the furnace to obtain a cylindrical powder sintered rod blank;

[0074] S26: forging and rolling: the rod blank is forged and rolled to prepare an alloy rod and subjected to drawing-annealing treatment;

[0075] The forging process is as follows: the alloy blank I is forged at 900-950℃, the forging ratio is 3-4, the alloy blank II is forged at 950-1000℃ after tempering heating for 1-2 h, the forging ratio is 5-6, and the alloy blank III is forged at 1000-1050℃, the forging ratio is 3-4;

[0076] The rolling process is as follows: the alloy rod is hot-rolled into a Φ4.0-5.0 mm alloy rod at 1000-1050℃ for 0.5-1.5 h and at 950-1100℃.

[0077] Adding lubricant before drawing, 6-8 drawing passes are carried out to obtain Φ1.0-1.5mm alloy wire;

[0078] The annealing is vacuum annealing, and the annealing temperature is 850-950℃.

[0079] S27: solid solution-aging treatment;

[0080] The solid solution treatment is a multi-step grading treatment; specifically, under a nitrogen environment, heating to 950-1000℃, holding for 2-3h, continuously heating to 1120-1170℃, holding for 2-3h, and rapidly water quenching to obtain a solid solution alloy;

[0081] The aging treatment is heating to 750-770℃, holding for 10-15h, and air cooling.

[0082] S28: surface treatment; that is

[0083] The alloy wire is pickled; coated; specifically, and in the absence of special instructions, the pickling in the following examples and comparative examples of the present application is that the alloy wire after heat treatment is pickled by using a mixed pickling solution containing 100g / L nitric acid and 20g / L hydrofluoric acid, the temperature is controlled to be ≤50°C, and the pickling time is 10min; finally, the residual acid on the surface is cleaned;

[0084] The coating is that a water-soluble coating agent is coated on the surface of the alloy wire after pickling, and the alloy wire after coating is naturally air-dried.

[0085] S29: plating; that is

[0086] The surface is plated to obtain the target product.

[0087] The surface plating process and in the absence of special instructions, the plating process in the following examples and comparative examples of the present application are as follows:

[0088] Pretreatment: the surface of the high-temperature nickel-based alloy welding wire is cleaned, the surface is polished by using sandpaper, and then cleaned in a mixed solution of sodium hydroxide (20g / L), trisodium phosphate (30g / L) and sodium silicate (30g / L) at 50℃ for 10min. Finally, electrolytic polishing is carried out in a mixed acid of 80% acetic acid and 20% perchloric acid, the electrolytic voltage is 27V, the power is turned on for 7s, and the welding wire I is prepared;

[0089] Nickel plating: a watt-type electrolyte is prepared, the electroplating solution includes nickel sulfate hexahydrate, nickel chloride hexahydrate and boric acid, a nickel layer is electroplated on the surface of the welding wire I to prepare the welding wire II, and the electroplating process parameters are current density 3A / dm 2, plating time 10 min, plating temperature 45 DEG C, stirring speed 300 r / min.

[0090] TiC plating: TiC plating solution is prepared, the TiC plating 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, TiC plating layer is plated on the nickel layer of welding wire II, welding wire III is prepared, and the plating process parameters are current density 3 A / dm 2 , plating time 0.5 h, plating temperature 45 DEG C, stirring speed 300 r / min.

[0091] Nickel plating: a vat type electrolyte is prepared, the plating solution includes 400 g / L NiSO4, 45 g / L NiCl2, 50 g / L H3BO3, and the balance is water, a nickel layer is further plated on the TiC plating layer of welding wire III, a nuclear power high-temperature nickel-based alloy composite welding wire is prepared, and the plating process parameters are current density 3 A / dm 2 , plating time 10 min, plating temperature 45 DEG C, stirring speed 300 r / min.

[0092] Another purpose of the embodiment of the present application is to provide the application of the above-mentioned high-strength high-temperature nickel alloy welding material in nickel-based cast high-temperature alloy welding.

[0093] In order to further understand the present application, the rare earth element-containing high-temperature creep-resistant nickel-based welding alloy material provided by the present application is described in detail below in conjunction with specific embodiments, and the protection scope of the present application is not limited by the following embodiments.

[0094] Example 1

[0095] The embodiment provides a rare earth element-containing high-temperature creep-resistant nickel-based welding alloy material, which includes the following powder raw materials in parts by weight: C: 0.05%, Si: 0.25%, Cr: 21.5%, Fe: 8.5%, Mn: 1.0%, Mo: 4.5%, B: 0.003%, Al+Ti: 0.16%, Nb: 1.5%, Ta: 0.2%, Sn: 0.7%, rare earth nucleating agent: 0.28%, Cu: 0.8%, S: 0.002%, P: 0.001%, and the balance is Ni.

[0096] The weight ratio of the above-mentioned Al and Ti is 3.0:1.

[0097] The preparation method of the above-mentioned rare earth nucleating agent includes the following steps:

[0098] S11, carbon nanotubes and graphene are added to a mixed solution of concentrated nitric acid and concentrated sulfuric acid, ultrasonic dispersion is carried out at room temperature for 6 hours, then the temperature is raised to 70 DEG C, reflux is carried out for 2 hours, most of the acid is removed by centrifugation, then filtration is carried out, the insoluble matter is washed with deionized water until neutral, and then the insoluble matter is placed in a vacuum drying oven at 60 DEG C for 12 hours to obtain an oxidized nanomaterial.

[0099] The total amount of the carbon nanotubes and the graphene is 1g, the amount of the concentrated nitric acid is 30mL, and the amount of the concentrated sulfuric acid is 90mL.

[0100] The weight ratio of the carbon nanotubes to the graphene is 2.0g:1.0g.

[0101] S12, the oxidized nanomaterial is added to anhydrous ethanol A and ultrasonic oscillation is carried out for 20 minutes to obtain a dispersion liquid; the dispersion liquid, a rare earth metal, and anhydrous ethanol B are added to a ball mill for ball milling treatment for 15 hours, then filtration is carried out, the insoluble matter is taken out, and then the insoluble matter is placed in a vacuum drying oven at 60 DEG C for 12 hours to obtain a rare earth nucleating agent.

[0102] The amount ratio of the oxidized nanomaterial, the anhydrous ethanol A, the rare earth metal, and the anhydrous ethanol B is 1g:20mL:15.0g:30mL.

[0103] The ball milling treatment is carried out at a rotation speed of 266r / min, and the mass ratio of the ball to the material is 9:1.

[0104] The rare earth metal is Y and other rare earth metals, and the weight ratio of Y to the other rare earth metals is 1g:0.2g.

[0105] The other rare earth metal is Ce.

[0106] Another object of the embodiment is to provide a preparation method of a high-temperature creep-resistant nickel-based welding alloy material containing a rare earth element, which comprises the following steps:

[0107] S21: raw material proportioning: under argon protection, original metal powder except for a rare earth nucleating agent is prepared;

[0108] S22: high-temperature vacuum melting: the prepared metal powder is subjected to high-temperature vacuum melting to obtain a nickel-containing alloy melt;

[0109] The vacuum degree of the vacuum melting is 6x10 3 Pa, and the melting temperature is 1500 DEG C.

[0110] S23: atomization and powdering: the nickel-containing alloy melt is treated by an argon atomization method, and spherical atomized nickel-based high-temperature alloy powder is obtained after screening;

[0111] The process parameters of the argon atomization method are as follows: the atomization temperature is 1700 DEG C, the atomization pressure is 0.3bar, the flow rate is 50mL / min, and the high-purity Ar is 99.99%.

[0112] S24: wet mixing method blending.

[0113] S25: hot isostatic pressing treatment: the mixed powder is placed in a stainless steel sleeve with a certain space reserved, degassing treatment is performed, and then sintered into a rod blank in a hot isostatic pressing machine;

[0114] The degassing treatment process is that the furnace temperature is kept at 680℃, the vacuum degree is <0.1Pa, and the keeping time is 7h; the sintering process is that the heating rate is 25℃ / min, the temperature is raised to 1250℃, then the surface is subjected to a gas pressure of 162MPa, and kept for 5h under constant pressure and temperature, and then cooled in the furnace to obtain a cylindrical powder sintered rod blank;

[0115] S26: forging and rolling: the rod blank is forged and rolled to prepare an alloy rod and subjected to drawing-annealing treatment;

[0116] The forging process is that the alloy blank I is forged at 920℃, the forging ratio is 3.5, after tempering heating at 980℃ for 1.5h, the alloy blank II is forged at 1020℃, the forging ratio is 5.5, and then the alloy blank III is forged at 1020℃, the forging ratio is 3.5;

[0117] The rolling process is that the alloy rod is hot rolled into Φ4.5mm alloy rod at 1030℃ for 1h and at 1000℃.

[0118] A lubricant is added before drawing, 7 passes of drawing are performed, and a Φ1.0mm alloy wire is obtained;

[0119] The annealing is vacuum annealing, and the annealing temperature is 900℃.

[0120] S27: solid solution-aging treatment;

[0121] The solid solution treatment is a multi-step grading treatment; specifically, the alloy is heated to 980℃ in a nitrogen environment, kept for 2.5h, continuously heated to 1150℃, kept for 2.5h, and then rapidly water quenched to obtain a solid solution alloy;

[0122] The aging treatment is specifically heating to 760℃, keeping for 12h, and air cooling.

[0123] S28: surface treatment.

[0124] S29: plating layer.

[0125] Example 2

[0126] The embodiment provides a rare earth element-containing high-temperature creep-resistant nickel-based welding alloy material, which comprises the following powder raw materials in parts by weight: C: 0.03%, Si: 0.40%, Cr: 23.0%, Fe: 10.0%, Mn: 1.2%, Mo: 4.0%, B: 0.005%, Al+Ti: 0.2%, Nb: 2.0%, Ta: 0.4%, Sn: 1.0%, rare earth nucleating agent: 0.20%, Cu: 1.0%, S: 0.002%, P: 0.001%, and the balance of Ni.

[0127] The weight ratio of the Al to the Ti is 3.0:1.

[0128] The preparation method of the rare earth nucleating agent comprises the following steps:

[0129] S11, carbon nanotubes and graphene are added into a concentrated nitric acid and concentrated sulfuric acid mixed solution, ultrasonic dispersion is carried out at room temperature for 4h, then the temperature is increased to 60 DEG C, reflux is carried out for 4h, most of the acid is removed by centrifugation, then filtration is carried out, the insoluble substance is washed to neutral with deionized water, and vacuum drying is carried out at 60 DEG C for 12h, to obtain an oxidized nanomaterial.

[0130] The total amount of the carbon nanotubes and the graphene is 1g, the amount of the concentrated nitric acid is 30mL, and the amount of the concentrated sulfuric acid is 90mL.

[0131] The weight ratio of the carbon nanotubes to the graphene is 2.0g:1.0g.

[0132] S12, the oxidized nanomaterial is added into anhydrous ethanol A and ultrasonic oscillation is carried out for 20min, to obtain a dispersion liquid; the dispersion liquid, a rare earth metal and anhydrous ethanol B are added into a ball mill for ball milling treatment for 12h, then filtration is carried out, the insoluble substance is taken out, and vacuum drying is carried out at 60 DEG C for 12h, to obtain a rare earth nucleating agent.

[0133] The amount ratio of the oxidized nanomaterial, the anhydrous ethanol A, the rare earth metal and the anhydrous ethanol B is 1g:20mL:15.0g:30mL.

[0134] The ball milling treatment rotation speed is 303r / min, and the mass ratio of the ball to the material is 8:1.

[0135] The rare earth metal is Y and other rare earth metals, and the weight ratio is 1g:0.2g.

[0136] The other rare earth metal is Ce.

[0137] Another object of the embodiment is to provide a preparation method of a rare earth element-containing high-temperature creep-resistant nickel-based welding alloy material, which comprises the following steps:

[0138] S21, raw material proportioning: under the protection of argon, original metal powder except the rare earth nucleating agent is prepared;

[0139] S22: high-temperature vacuum smelting: smelting the prepared metal powder to obtain a nickel-containing alloy melt;

[0140] The vacuum degree of the above vacuum smelting is 8*10 3 Pa, and the smelting temperature is 1420℃;

[0141] S23: atomization powdering: treating the nickel-containing alloy melt by an argon atomization method to obtain spherical atomized nickel-based high-temperature alloy powder after screening;

[0142] The process parameters of the above argon atomization method are as follows: atomization temperature 1720℃, atomization pressure 0.3 bar, flow rate 45 mL / min, and 99.99% high-purity Ar.

[0143] S24: blending by wet mixing method.

[0144] S25: hot isostatic pressing treatment: placing the mixed powder in a stainless steel sleeve and reserving a certain space, degassing treatment, and then sintering into a rod blank in a hot isostatic pressing machine;

[0145] The degassing treatment process is as follows: keeping the furnace temperature at 700℃, vacuum degree <0.1 Pa, and maintaining for 6 h; and the sintering process is as follows: heating at a rate of 25℃ / min to 1280℃, then applying a gas pressure of 120 MPa to the surface, and maintaining for 4 h under constant pressure and temperature, and cooling in the furnace to obtain a cylindrical powder sintered rod blank;

[0146] S26: forging and rolling: forging and rolling the rod blank to prepare an alloy rod and performing drawing-annealing treatment;

[0147] The forging process is as follows: open-die forging into an alloy blank I at 950℃ with a forging ratio of 3, tempering heating at 1000℃ for 1 h, then forging into an alloy blank II at 1050℃ with a forging ratio of 5, and then forging into an alloy blank III at 1050℃ with a forging ratio of 3;

[0148] The rolling process is as follows: keeping at 1050℃ for 0.5 h, and hot rolling into a Φ4.0 mm alloy rod at 1100℃.

[0149] Adding a lubricant before drawing, and performing 8-pass drawing to obtain a Φ1.0 mm alloy wire;

[0150] The above annealing is vacuum annealing, and the annealing temperature is 950℃.

[0151] S27: solid solution-ageing treatment;

[0152] The solid solution treatment is a multi-step grading treatment; specifically, heating to 1000 DEG C under a nitrogen environment, holding for 2h, continuously heating to 1120 DEG C, holding for 3h, and rapidly water quenching to obtain the solid solution alloy;

[0153] The aging treatment is specifically heating to 750 DEG C, holding for 15h, and air cooling.

[0154] S28: surface treatment.

[0155] S29: plating layer.

[0156] Embodiment 3

[0157] The embodiment provides a rare earth element-containing high-temperature creep-resistant nickel-based welding alloy material, which comprises the following powder raw materials in parts by weight: C: 0.08%, Si: 0.10%, Cr: 20.0%, Fe: 7.0%, Mn: 0.8%, Mo: 5.0%, B: 0.001%, Al+Ti: 0.1%, Nb: 1.0%, Ta: 0.1%, Sn: 0.5%, rare earth nucleating agent: 0.35%, Cu: 0.5%, S: 0.002%, P: 0.001%, and Ni: the balance.

[0158] The weight ratio of Al to Ti is 3.0:1.

[0159] The preparation method of the rare earth nucleating agent comprises the following steps:

[0160] S11, carbon nanotubes and graphene are added to a concentrated nitric acid and concentrated sulfuric acid mixture, ultrasonic dispersion is carried out at room temperature for 8h, then the temperature is raised to 80 DEG C, reflux is carried out for 1h, most of the acid is removed by centrifugation, then filtration is carried out, the insoluble matter is washed to neutral with deionized water, and vacuum drying is carried out at 60 DEG C for 12h to obtain an oxidized nanomaterial.

[0161] The total amount of the carbon nanotubes and the graphene is 1g, the amount of the concentrated nitric acid is 30mL, and the amount of the concentrated sulfuric acid is 90mL.

[0162] The weight ratio of the carbon nanotubes to the graphene is 2.0g:1.0g.

[0163] S12, the oxidized nanomaterial is added to anhydrous ethanol A and ultrasonic oscillation is carried out for 20min to obtain a dispersion liquid; the dispersion liquid, a rare earth metal and anhydrous ethanol B are added to a ball mill for ball milling treatment for 18h, then filtration is carried out, the insoluble matter is taken out, and vacuum drying is carried out at 60 DEG C for 12h to obtain a rare earth nucleating agent.

[0164] The amount ratio of the oxidized nanomaterial, the anhydrous ethanol A, the rare earth metal and the anhydrous ethanol B is 1g:20mL:15.0g:30mL.

[0165] The ball milling treatment rotation speed is 204 r / min, and the ball-to-material mass ratio is 10:1.

[0166] The rare earth metal is Y and other rare earth metals in a weight ratio of 1g:0.2g.

[0167] The other rare earth metal is Ce.

[0168] Another object of the embodiment is to provide a preparation method of a high-temperature creep-resistant nickel-based welding alloy material containing rare earth elements, comprising the following steps:

[0169] S21: raw material proportioning: under argon protection, raw metal powder except for rare earth nucleating agent is prepared;

[0170] S22: high-temperature vacuum melting: the prepared metal powder is subjected to high-temperature vacuum melting to obtain a nickel-containing alloy melt;

[0171] The vacuum degree of the vacuum melting is 5x10 3 Pa, and the melting temperature is 1600℃.

[0172] S23: atomization and powdering: the nickel-containing alloy melt is treated by argon atomization method, and spherical atomized nickel-based high-temperature alloy powder is obtained after screening;

[0173] The process parameters of the argon atomization method are as follows: atomization temperature 1680℃, atomization pressure 0.3bar, flow rate 55mL / min, and 99.99% high-purity Ar.

[0174] S24: wet mixing method blending.

[0175] S25: hot isostatic pressing treatment: the mixed powder is placed in a stainless steel sleeve with a certain space reserved, degassed, and then sintered into a rod blank in a hot isostatic pressing machine;

[0176] The degassing process is that the furnace temperature is kept at 660℃, the vacuum degree is <0.1Pa, and the keeping time is 8h; and the sintering process is that the heating rate is 25℃ / min, the temperature is raised to 1220℃, then a gas pressure of 180MPa is applied to the surface, and the constant pressure and temperature are kept for 6h, and the furnace is cooled to obtain a cylindrical powder sintered rod blank;

[0177] S26: forging and rolling: the rod blank is forged and rolled to prepare an alloy rod and subjected to drawing-annealing treatment;

[0178] The forging process is that the alloy blank I is forged at 900℃, the forging ratio is 4, after tempering heating at 950℃ for 2h, the alloy blank II is forged at 1000℃, the forging ratio is 6, and the alloy blank III is forged at 1000℃, the forging ratio is 4.

[0179] The rolling process is to heat Φ5.0mm alloy rod at 1000℃ for 1.5h and at 950℃.

[0180] A lubricant is added before drawing, and 6 passes of drawing are performed to obtain Φ1.5mm alloy wire.

[0181] The annealing is vacuum annealing, and the annealing temperature is 850℃.

[0182] S27: solution-aging treatment;

[0183] The solution treatment is a multi-step grading treatment; specifically, the alloy is heated to 950℃ under nitrogen atmosphere, kept for 3h, continuously heated to 1170℃, kept for 2h, and rapidly water quenched to obtain a solution state alloy.

[0184] The aging treatment is specifically heating to 770℃, keeping for 10h, and air cooling.

[0185] S28: surface treatment.

[0186] S29: coating.

[0187] Example 4

[0188] The same as example 1, except that:

[0189] A high-temperature creep-resistant nickel-based welding alloy material containing rare earth elements,

[0190] Preferably, the weight ratio of Al to Ti is 2.0:1.

[0191] Example 5

[0192] The same as example 1, except that:

[0193] A high-temperature creep-resistant nickel-based welding alloy material containing rare earth elements,

[0194] Preferably, the weight ratio of Al to Ti is 4.0:1.

[0195] Example 6

[0196] The same as example 1, except that:

[0197] A high-temperature creep-resistant nickel-based welding alloy material containing rare earth elements,

[0198] The preparation method of the rare earth nucleating agent in S11,

[0199] Preferably, the weight ratio of carbon nanotubes to graphene is 0.5g:1.0g.

[0200] Example 7

[0201] Other than in Example 1, except that:

[0202] A high-temperature creep-resistant nickel-based welding alloy material formula containing rare earth elements,

[0203] The preparation method of the rare earth nucleating agent, S11,

[0204] The weight ratio of carbon nanotubes to graphene is preferably 3.0g:1.0g.

[0205] Example 8

[0206] Other than in Example 1, except that:

[0207] A high-temperature creep-resistant nickel-based welding alloy material formula containing rare earth elements,

[0208] The preparation method of the rare earth nucleating agent, S12,

[0209] The dosage ratio of the oxidized nanomaterial, anhydrous ethanol A, rare earth metal, and anhydrous ethanol B is preferably 1g:20mL:10.0g:30mL.

[0210] Example 9

[0211] Other than in Example 1, except that:

[0212] A high-temperature creep-resistant nickel-based welding alloy material formula containing rare earth elements,

[0213] The preparation method of the rare earth nucleating agent, S12,

[0214] The dosage ratio of the oxidized nanomaterial, anhydrous ethanol A, rare earth metal, and anhydrous ethanol B is preferably 1g:20mL:20.0g:30mL.

[0215] Example 10

[0216] Other than in Example 1, except that:

[0217] A high-temperature creep-resistant nickel-based welding alloy material formula containing rare earth elements,

[0218] The preparation method of the rare earth nucleating agent, S12,

[0219] The rare earth metal is preferably Y and other rare earth metals in a weight ratio of 1g:0.5g.

[0220] Example 11

[0221] Other than in Example 1, except that:

[0222] A high-temperature creep-resistant nickel-based welding alloy material formula containing rare earth elements,

[0223] The preparation method of the rare earth nucleating agent in S12,

[0224] Preferably, the rare earth metal is Y and other rare earth metals are not added.

[0225] The following comparative examples are compared with Example 1:

[0226] Comparative Example 1

[0227] Other than Example 1, the difference is that:

[0228] The present example provides a high-temperature creep-resistant nickel-based welding alloy material containing rare earth elements, which comprises the following powder raw materials in parts by weight: C: 0.05%, Si: 0.25%, Cr: 20.0%, Fe: 8.5%, Mn: 1.0%, Mo: 4.5%, B: 0.003%, Al+Ti: 0.16%, Nb: 1.5%, Ta: 0.2%, Sn: 0.7%, rare earth nucleating agent: 0.28%, Cu: 0.8%, S: 0.002%, P: 0.001%, Ni balance.

[0229] Comparative Example 2

[0230] Other than Example 1, the difference is that:

[0231] A high-temperature creep-resistant nickel-based welding alloy material containing rare earth elements,

[0232] The weight ratio of Al to Ti is 1.0:1.

[0233] Comparative Example 3

[0234] Other than Example 1, the difference is that:

[0235] A high-temperature creep-resistant nickel-based welding alloy material containing rare earth elements,

[0236] The weight ratio of Al to Ti is 5.0:1.

[0237] Comparative Example 4

[0238] Other than Example 1, the difference is that:

[0239] A high-temperature creep-resistant nickel-based welding alloy material containing rare earth elements,

[0240] No Cu is added.

[0241] Comparative Example 5

[0242] Other than Example 1, the difference is that:

[0243] A high-temperature creep-resistant nickel-based welding alloy material formula containing rare earth elements,

[0244] No rare earth nucleating agent is added.

[0245] Comparative Example 6

[0246] Other than Example 1, except that:

[0247] A high-temperature creep-resistant nickel-based welding alloy material formula containing rare earth elements,

[0248] The preparation method of the rare earth nucleating agent, S12,

[0249] The rare earth metal rare earth is Y, and other rare earth metals are 0g:0.2g in weight ratio; that is, Y is not added.

[0250] Comparative Example 7

[0251] Other than Example 1, except that:

[0252] A high-temperature creep-resistant nickel-based welding alloy material formula containing rare earth elements,

[0253] The rare earth nucleating agent is replaced by a mixture of Y and Ce in a weight ratio of 1.0g:0.2g.

[0254] Comparative Example 8

[0255] Other than Example 1, except that:

[0256] A high-temperature creep-resistant nickel-based welding alloy material formula containing rare earth elements,

[0257] The preparation method of the rare earth nucleating agent, S11,

[0258] The weight ratio of carbon nanotubes to graphene is 2.0g:0g; that is, no graphene is added.

[0259] Comparative Example 9

[0260] Other than Example 1, except that:

[0261] A high-temperature creep-resistant nickel-based welding alloy material formula containing rare earth elements,

[0262] The preparation method of the rare earth nucleating agent, S11,

[0263] The weight ratio of carbon nanotubes to graphene is 0g:1.0g; that is, no carbon nanotubes are added.

[0264] Comparative Example 10

[0265] Other than Example 1, except that:

[0266] A high-temperature creep-resistant nickel-based welding alloy material formula containing rare earth elements,

[0267] The preparation method of the rare earth nucleating agent, S12,

[0268] The weight ratio of the mixture of carbon nanotubes and graphene replacing the oxidized nanomaterial is 2.0g:1.0g; the oxidized treatment operation of S11 is not performed.

[0269] The nickel alloy welding material obtained by the examples and comparative examples is used for tungsten inert gas arc welding on a high-temperature pressure-bearing furnace pipe (ZG20Ni32Cr20Nb) with a size of 212mm (diameter) x 150mm (length) x 11mm (wall thickness), and the heat treatment parameters after welding are 610℃ for 24h.

[0270] The physical properties of the high-temperature creep-resistant nickel-based welding alloy material containing rare earth elements prepared by the examples and comparative examples of the present application are measured respectively, and the results are shown in Table 1.

[0271] Table 1: Physical test performance of each example

[0272]

[0273] It can be observed from Examples 1-11 that the high-temperature creep-resistant nickel-based welding alloy material containing rare earth elements of the present application has excellent crack resistance, high-temperature mechanical properties and high-temperature creep resistance (all >550h at 700℃*550MPa).

[0274] It can be observed from Examples 1 and Comparative Examples 1-4 that the addition of appropriate amounts of Cr and Mo in the high-temperature creep-resistant nickel-based welding alloy material containing rare earth elements of the present application achieves solid solution strengthening effect, improves high-temperature mechanical properties and high-temperature creep resistance; Al and Ti have certain strengthening and toughening effect on the alloy and appropriate proportions have positive significance for mechanical properties; Cu can improve high-temperature creep resistance;

[0275] It can be observed from Examples 1 and Comparative Examples 5-10 that the rare earth nucleating agent in the present application has an important role in the high-temperature mechanical properties and creep resistance of the welding material, and the rare earth element, especially metallic yttrium, has a significant effect; the rare earth element (metallic yttrium) is modified and compounded with one-dimensional nanomaterials and two-dimensional nanomaterials to achieve mutual synergistic improvement of high-temperature creep resistance; and the performance of the nanomaterials after oxidation treatment is improved significantly.

[0276] In summary, the high-temperature creep-resistant nickel-based welding alloy material containing rare earth elements of the present application has excellent high-temperature mechanical properties, especially excellent high-temperature creep resistance.

[0277] The test methods are as follows:

[0278] (1) Anti-cracking: observe whether there is a visible crack in the solder strip, and the sample is intact or the length of a single crack is ≤1.5mm after bending, then it is recorded as "OK"; otherwise, there is a visible crack, and the length of a single crack is >1.5mm after bending, then it is recorded as "NG".

[0279] (2) Mechanical property test: according to GB / T2651 2008 "Tensile test method for welded joints", high temperature mechanical property test is carried out on the welded joint at 700℃.

[0280] (3) Creep life: the sample has a length of 50mm and a diameter of 5mm, the test temperature is 700℃, and the tensile stress is set to 550MPa.

[0281] With the above ideal embodiments according to the present application as inspiration, through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A high temperature creep resistant nickel-base weld alloy material containing rare earth elements, characterized in that: The powder raw material includes the following weight parts: C: 0.03-0.08%, Si: 0.10-0.40%, Cr: 20.0-23.0%, Fe: 7.0-10.0%, Mn: 0.8-1.2%, Mo: 4.0-5.0%, B: 0.001-0.005%, Al+Ti: 0.1-0.2%, Nb: 1.0-2.0%, Ta: 0.1-0.4%, Sn: 0.5-1.0%, rare earth nucleating agent: 0.20-0.35%, Cu: 0.5-1.0%; S: <0.005%, P: <0.005%, Ni: balance; The preparation method of the rare earth nucleating agent includes the following steps: S11, one-dimensional nanomaterials and two-dimensional nanomaterials are subjected to surface oxidation treatment to obtain oxidized nanomaterials; S12, the oxidized nanomaterials are subjected to ball milling treatment with rare earth metals to obtain a rare earth nucleating agent; The weight ratio of the one-dimensional nanomaterials to the two-dimensional nanomaterials is 0.5-3.0g:1.0g; The weight ratio of the oxidized nanomaterials to the rare earth metals is 1g:10.0-20.0g; and The rare earth metal includes Y.

2. The rare earth element-containing high-temperature creep-resistant nickel-based welding alloy material according to claim 1, characterized in that: The total amount of Cr and Mo is not less than 25.0%.

3. The rare earth element-containing high-temperature creep-resistant nickel-based welding alloy material according to claim 1, characterized in that: The weight ratio of Al to Ti is (2.0-4.0):

1.

4. The method of claim 1, wherein the method further comprises: The method includes the following steps: ​ S21: raw material proportioning: under argon protection, raw metal powders except the rare earth nucleating agent are prepared; S22: high-temperature vacuum melting: the prepared metal powders are subjected to high-temperature vacuum melting to obtain a nickel-containing alloy melt; S23: atomization powdering: the nickel-containing alloy melt is treated by argon atomization method, and after screening, spherical atomized nickel-based high-temperature alloy powder is obtained; S24: wet mixing method blending: the spherical atomized nickel-based high-temperature alloy powder and the rare earth nucleating agent are added into ethanol, ultrasonic treatment is performed to obtain an ethanol suspension, and drying treatment is performed to obtain a mixed powder; S25: hot isostatic pressing treatment: the mixed powder is placed in a stainless steel sleeve with a certain space reserved, degassing treatment is performed, and then the mixed powder is placed in a hot isostatic pressing machine to sinter into a rod blank; S26: forging and rolling: the rod blank is subjected to forging and rolling to prepare an alloy rod; S27: solid solution-ageing treatment; S28: surface treatment; that is The alloy wire is subjected to pickling; coating; S29: plating; that is The surface is plated to obtain a target product.

5. Application of the rare earth element-containing high-temperature creep-resistant nickel-based welding alloy material according to claim 1 in welding connection of high-temperature pressure-bearing service components.

Images