CN114310033B - Activating diffusion agent and application thereof - Google Patents
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- CN114310033B CN114310033B CN202111649985.7A CN202111649985A CN114310033B CN 114310033 B CN114310033 B CN 114310033B CN 202111649985 A CN202111649985 A CN 202111649985A CN 114310033 B CN114310033 B CN 114310033B
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Abstract
The invention discloses an activated dispersing agent, which comprises the following components in parts by mass: 10-16 parts of Cr, 0-3 parts of W, 20-26 parts of Co, 8-13 parts of Ta, 4-9 parts of Mo, 5-9 parts of Ti, 2-3.5 parts of Nb, 1.3-4 parts of Al, 0-3 parts of Re and the balance of Ni. The activation diffusion agent can be applied to additive repair and transient liquid phase connection of nickel-based superalloy components. The activation diffusion agent has low melting temperature and less influence on the tissue and performance of a repair area; the heterogeneous weakening phase is not generated, a high-strength microstructure can be obtained in an application area, the problems of additive repair and connection of the nickel-based superalloy component are solved, and the method has a wide important application value.
Description
Technical Field
The invention relates to an activated diffusion agent and application thereof, and belongs to the technical field of material engineering.
Background
The high-temperature alloy blade is a key component of a gas turbine, is high in price, and is easy to generate various service injuries such as cracks, oxidation, corrosion and reduction of meat when the blade works in severe environments such as high temperature, high pressure and corrosive gas for a long time. With the development of high-power and high-performance gas turbines, the problem that the blades fail too early due to service damage is also increased, the blades are far from reaching the designed service life, and the maintenance cost of the gas turbine can be greatly increased if the new blades are replaced. Therefore, the proper service damage defect repair technology is researched and developed aiming at the nickel-based superalloy blade, and the method has important significance for reducing the maintenance cost and improving the maintenance and guarantee capability of the gas turbine.
The conventional repair method is mainly divided into welding and soldering. The blade material is usually nickel-based superalloy with high Al and Ti content, the material has high-temperature strength but poor weldability, gamma (Ni 3Al phase) precipitates and precipitates quickly in the welding process, the possibility of microcrack occurrence is directly proportional to the amount of gamma '(Ni 3Al phase), and the volume percentage of gamma' (Ni 3Al phase) in the nickel-based alloy for the gas turbine blade is generally higher than 50%, so that the conventional fusion welding repair method is difficult to use. IN addition, IN order to avoid cracking, some special fusion welding repairs are generally performed by adopting solid solution strengthening alloy, such as IN625 alloy, and the repair area is limited to a low stress area, so that the strength, oxidation resistance and corrosion resistance after repair are obviously reduced. Vacuum brazing belongs to integral heating, reduces the occurrence probability of cracks, but the brazing filler metal contains elements such as boron, silicon and the like, so that the problems of linear low-melting eutectic, massive boride and component segregation are easy to occur, and the bonding strength and the high-temperature performance are seriously affected.
The powder metallurgy repair remanufacturing technology overcomes the defects of cladding welding and brazing, not only can repair the defects of large area and large gap, but also can ensure the high performance of a repair area. The powder metallurgy method has complex procedures and a plurality of influencing factors. In the process of repairing the blade, the proportion of the low-melting-point activation auxiliary alloy powder, the high-melting-point plastic powder and the binder is that the components of alloy elements in the powder are added, and the granularity of the powder and the sintering temperature are all important factors affecting the repairing quality. Among these, the decisive effect is the composition of the alloying elements in the powder. It is difficult to achieve satisfactory results with some commercial nickel-based low-melting-point activation adjuvant alloys because these commercial interlayer alloys are relatively simple in composition, contain boron, and are difficult to achieve compositional matching with the parent metal nickel-based superalloy, thus failing to meet the strength requirements of the joint.
Disclosure of Invention
The invention aims at: aiming at the problems, the invention provides an activated diffusion agent and application thereof, wherein the activated diffusion agent does not contain boron, silicon, zirconium, hafnium and other traditional melting point inhibiting elements, and the components are all strengthening elements in high-temperature alloy, so that heterogeneous weakened phases are not generated; the melting temperature is lower than the solution heat treatment temperature of most alloys, the additive repair or connection can be carried out under the heat treatment system of the component alloy, the primary melting phenomenon of the alloy caused by the overhigh repair temperature can not be caused, and the method is particularly suitable for the connection and repair of the nickel-based superalloy casting with poor weldability and high aluminum-titanium content.
The technical scheme adopted by the invention is as follows:
an activated diffusion agent comprises the following components in parts by mass: 10-16 parts of Cr, 0-3 parts of W, 20-26 parts of Co, 8-13 parts of Ta, 4-9 parts of Mo, 5-9 parts of Ti, 2-3.5 parts of Nb, 1.3-4 parts of Al, 0-3 parts of Re and the balance of Ni.
Through continuous experiments of the inventor, co, cr, W, mo, ta, nb, al, ti, re IN the obtained alloy jointly realizes the effect of melting point inhibition under the specific proportion of various metals, the melting temperature of the obtained activated diffusant is 1120-1160 ℃, the melting temperature of the obtained activated diffusant is lower than the solution heat treatment temperature of most alloys, and the obtained activated diffusant comprises precipitation-enhanced nickel-based casting superalloy such as MarM247, CM247LC, IN738LC, IN939, MGA2400, GTD-111, GTD-222 and the like, and the lower melting point can ensure wider application range.
The components of the activated diffusant in the invention except the matrix element Ni only contain Co, cr, W, mo, ta, nb, al, ti, re, are all strengthening elements in the high-temperature alloy, and do not generate heterogeneous weakened phases; the alloy does not contain traditional melting point inhibiting elements such as boron, silicon, zirconium, hafnium and the like, and does not influence the strength of the repair area.
Preferably, the activated diffusion agent is in the form of powder, and the particle size of the powder is 10 to 106. Mu.m.
Preferably, the activated diffusion agent is prepared by an atomization method.
The application of the activation diffusion agent comprises that a repairing material containing the activation diffusion agent and plastic powder is used for carrying out additive repairing on the defects of the nickel-based superalloy component, wherein the plastic powder and the nickel-based superalloy component have the same components.
Preferably, the repair material comprises, in parts by mass, per hundred parts: 30-65 parts of activated dispersing agent, 30-65 parts of plastic powder and 5-20 parts of adhesive.
Preferably, the length of the member defect is 0 to 30mm, the width is 0 to 30mm, and the height is 0 to 5mm.
In the invention, the binder is an organic binder which can be decomposed at high temperature, and the binder is used for mixing the activated diffusant and the plastic powder to form a pasty repairing material; the plastic powder with the same components as those of the nickel-based superalloy component is added, so that the components of the repair material are as close as possible to those of the component to be repaired, the strength of the repaired component is ensured, the corresponding effect cannot be achieved if the addition amount of the plastic powder is too small, and the liquid phase fluidity of the repair material is affected if the addition amount of the plastic powder is too large, so that the repair performance is affected. The invention can repair the defects with the length of 0-30 mm, the width of 0-30 mm and the height of 0-5 mm.
Preferably, the additive repair comprises the steps of:
step A1: uniformly mixing the activated diffusant, the plastic powder and the binder according to a proportion to prepare a pasty repairing material;
step B1: coating a repair material on a region to be repaired of the component, and shaping the repair material;
step C1: and (3) placing the component into a vacuum heat treatment furnace, heating to 1190-1230 ℃, preserving heat for 1-3 h, and cooling to room temperature after the heat preservation is finished.
Preferably, in step B1, the area of the component to be repaired needs to be cleaned before the repair material is applied.
Preferably, in step C1, the temperature rising rate is not higher than 16.8 ℃/min.
Preferably, in the step C1, the vacuum degree of the vacuum heat treatment furnace is 10 -2 Pa and above.
The use of an activated diffusion agent as described above, using a joining material comprising an activated diffusion agent for transient liquid phase joining between nickel-based superalloy components.
Preferably, the connecting material comprises, in parts by mass, per hundred parts: 80-95 parts of an activation dispersing agent and 5-20 parts of a binder.
Preferably, the transient liquid phase connection comprises the steps of:
step A2: uniformly mixing the activated dispersing agent and the adhesive according to a proportion to prepare a pasty connecting material;
step B2: coating a connecting material on the surfaces to be connected of the components, and butting the surfaces to be connected of the two components;
step C2: and (3) placing the component into a vacuum heat treatment furnace, heating to 1190-1230 ℃, preserving heat for 0.5-3 h, and cooling to room temperature after the heat preservation is finished.
Preferably, in step B2, a pretreatment is required to remove oil stains and oxides from the surfaces to be joined prior to application of the joining material.
Preferably, in step C2, the rate of temperature increase is not higher than 16.8deg.C/min.
Preferably, in the step C2, the vacuum degree of the vacuum heat treatment furnace is 10 -2 Pa and above.
Preferably, the gap between the components is 0.01-0.1 mm.
The application of the activation diffusion agent uses a crack repairing material containing the activation diffusion agent for crack repairing of a nickel-based superalloy component.
Preferably, the crack repair material comprises, in parts by mass, per hundred parts: 80-95 parts of an activation dispersing agent and 5-20 parts of a binder.
Preferably, the crack repair comprises the steps of:
step A3: uniformly mixing the activated dispersing agent and the adhesive according to a proportion to prepare a pasty connecting material;
step B3: coating crack repairing material on the part of the member to be connected with the crack;
step C3: and (3) placing the component into a vacuum heat treatment furnace, heating to 1190-1230 ℃, preserving heat for 0.5-3 h, and cooling to room temperature after the heat preservation is finished.
Preferably, in step B2, the crack is pretreated to remove oil and oxides from the crack prior to application of the crack repair material.
Preferably, in step C2, the rate of temperature increase is not higher than 16.8deg.C/min.
Preferably, in the step C2, the vacuum degree of the vacuum heat treatment furnace is 10 -2 Pa and above.
Preferably, the crack gap width of the repairable member is 0.01 to 0.1mm.
Of course, the active diffusion agent of the present invention can also be used in conventional brazing or large gap brazing.
The low-melting-point activated low-melting-point diffusion aid alloy powder does not contain traditional melting point inhibition elements such as boron, silicon, zirconium, hafnium and the like, and the traditional boron-containing activation aid is added with about 3 weight percent of boron for melting point inhibition, so that the alloy melting point reaches about 1100 ℃, and boron is difficult to diffuse into a matrix in the repairing area, and boron left in the repairing area often forms boron-rich brittle eutectic compounds and massive borides due to the fact that the total amount of boron in the repairing area is very high, particularly in the large-gap repairing process, and the strength of the repairing area is influenced by the boron left. High heightIn the superalloy, silicon element is generally controlled as impurity element, the content of the silicon element is controlled below 0.03 weight percent, and the silicon-containing activation auxiliary agent is not suitable for superalloy repair. The activating auxiliary agent containing zirconium and hafnium is easy to exist in eutectic, so that a large amount of eutectic structures and weakened phases are often generated in a repairing area, and the strength is reduced. For example: melting point inhibition by Hf generally requires about 20wt% addition, resulting in easy formation of Ni in the later stage 5 Hf、Ni 7 Hf 2 And nickel hafnium compounds and eutectic phases are treated, the melting point of the precipitated phases is low, and the method has negative effects on the reheating treatment and the future high-temperature application of the repaired component.
The activation auxiliary powder component of the invention only contains Co, cr, W, mo, ta, nb, al, ti, re except the matrix element Ni, is a strengthening element in high-temperature alloy, does not generate heterogeneous weakened phase, inhibits the melting point of the alloy to 1120-1160 ℃, fully reacts and fuses with plastic powder at reasonable temperature (1190-1230 ℃) to obtain high-quality repairing result, forms a grain structure after repairing, forms carbide to strengthen the grain boundary, and diffuses and separates gamma' strengthening phase with high volume fraction in the grain boundary and the grain boundary, thus being an ideal microscopic structure morphology after repairing. Unlike the conventional low-melting-point alloy powder material with B, si, zr, hf for alloy melting point inhibition, the present invention features that the ideal melting point inhibition effect is realized only through the proportioning of the strengthening elements IN the high-temperature alloy, no specific melting point inhibition element exists, the Co, cr, W, mo, ta, nb, al, ti, re IN the alloy realizes the melting point inhibition effect through the specific proportion, the melting temperature range is 1120-1160 ℃ and is lower than the solution heat treatment temperature of most of the alloys, and the alloys comprise precipitation strengthening nickel-base casting superalloy such as MarM247, CM247LC, IN738LC, IN939, MGA2400, GTD-111, GTD-222, etc. In general, the repair and brazing are matched with the optimal heat treatment temperature of the alloy, and the low melting point can ensure wider application range. Some alloy powders in the prior art do not contain adverse elements such as boron, silicon and the like, but have melting temperature ranging from 1205 ℃ to 1223 ℃ and even higher, and have melting point inhibition effect far lower than that of the invention, so as to ensureThe Alloy has enough liquid phase fluidity, can be only suitable for repairing Alloy with 1230 ℃ high solid solution temperature like Alloy247, and can realize melting point inhibition and increase Ni of a repairing area after the content of Ti is simply increased, for example, the content is 13-16wt% 3 The precipitation of Ti (eta) phase, which is a weakened phase in high temperature alloys, while the high Ti content presents a great challenge to the vacuum of the vacuum furnace, 10 for conventional industrial applications -2 The vacuum furnace of Pa vacuum degree cannot be applied because oxidation of Ti element is caused.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
1. the main constituent elements of the activated diffusant are basically consistent with those of a common nickel-based superalloy body, and no external lead element exists, so that the activated diffusant can be suitable for repairing nickel-based casting superalloys with high aluminum and titanium contents such as MarM247, CM247LC, IN738LC, IN939, MGA2400, GTD-111, GTD-222 and the like;
2. the activated diffusant does not contain traditional melting point inhibiting elements such as boron, silicon, zirconium, hafnium and the like; the ideal melting point inhibition effect is realized only by proportioning all the strengthening elements in the high-temperature alloy, no specific melting point inhibition element exists, the Co, cr, W, mo, ta, nb, al, ti, re in the alloy is subjected to high entropy through specific proportion regulation and control, the melting point inhibition effect is realized together, and the melting temperature range is 1120-1160 ℃;
3. unlike available brazing filler metal containing boron, silicon, zirconium, hafnium, etc. the present invention has no heterogeneous precipitated phase, the repaired microstructure is basically identical to that of high temperature alloy member, and the microstructure features gamma phase, gamma 'phase, gamma+gamma' eutectic and carbide, no boride and other brittle phase and high repair strength;
4. the activated diffusant is used for carrying out transient liquid phase connection of a superalloy component, a boride brittle precipitated phase and a diffusion zone caused by boron diffusion are not generated, the traditional boron-containing intermediate layer contains about 3 weight percent of boron, and the boron is combined with W, mo elements in a diffusion zone matrix to form unavoidable boride in the process of boron diffusion, so that the strength of the matrix is weakened; the microstructure of the transient liquid phase connecting region is gamma phase, gamma' phase and carbide, and the precipitated phase type is consistent with that of the high-temperature alloy component;
5. the melting temperature of the activated dispersing agent is lower than the solution heat treatment temperature of most alloys, so that the additive repair can be carried out under the condition that the component alloy has a thermosetting solution heat treatment system, and the phenomenon of primary melting of the alloy caused by overhigh repair temperature can not be caused;
6. the content of the activated diffusant alloy powder can be adjusted according to the appearance characteristics of the base material and the area to be repaired so as to achieve the most suitable process proportion, and the influence on the tissue and performance of the repaired area is small;
7. the complex defects of the large-size and high-depth three-dimensional structure can be freely repaired, and a plurality of stations can be simultaneously repaired;
8. the low-melting-point activated low-melting-point diffusion aid alloy powder disclosed by the invention has good flowability, is not easy to oxidize and has excellent technological properties.
Drawings
The invention will now be described by way of example and with reference to the accompanying drawings in which:
FIG. 1 is a melting temperature DSC test curve of activated diffuser example 4;
FIG. 2 is a melting temperature DSC test curve of activated diffuser example 5;
FIG. 3 is a macroscopic texture morphology after additive repair of MarM247 alloy;
FIG. 4 is a microstructure morphology of MarM247 alloy after additive repair;
FIG. 5 shows the mechanical properties of MarM247 alloy after repair;
FIG. 6 is a microstructure morphology of joint locations after transient liquid phase joining of IN-738LC alloys.
Detailed Description
All of the features disclosed in this specification, or all of the steps in a method or process disclosed, may be combined in any combination, except for mutually exclusive features and/or steps.
Any feature disclosed in this specification may be replaced by alternative features serving the same or equivalent purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise.
The term "not incorporated" and "not containing" and "0%" as used herein means that the element or the like is not intentionally added as a raw material to the activated diffusion agent of the present invention; however, it is within the scope of the present invention that certain impurities or components may be present as starting materials and/or equipment for producing the activated diffusion agent that are not intentionally added, and that may be present in small or trace amounts in the final activated diffusion agent.
Examples
In order to further clearly illustrate and describe the technical solutions of the present invention, the following non-limiting examples are provided. The constituent elements are given in parts by weight and have been standardized to 100 parts.
Table 1 below shows examples of activated diffusion agents
Table 2 below shows comparative examples of activated diffusants
| Comparative example 1 | Comparative example 2 | ComparisonExample 3 | Comparative example 4 | Comparative example 5 | ||
| |
8 | 16 | 14 | 17 | 14 | |
| | \ | 4 | 4 | \ | 4 | |
| Co | 19 | 3 | 3 | 16 | 3 | |
| | \ | 1 | 1 | \ | 1 | |
| | \ | 1 | 1 | 14 | \ | |
| Ti | \ | 13 | 15 | 9 | 15 | |
| Nb | \ | \ | \ | | \ | |
| Al | ||||||
| 5 | 1 | 1 | 1 | 1 | ||
| Re | \ | \ | \ | \ | 0 | |
| Ni | 57 | 61 | 61 | 43 | 61 | |
| |
3 | | ||||
| Zr | ||||||
| 8 | \ | |||||
| | \ | \ | 1 | |||
| Totalizing | 100 | 100 | 100 | 100 | 100 | |
| Melting Point/. Degree.C | 1142.1 | 1205.3 | 1216.7 | 1226.1 | 1232.4 |
In summary, the low-melting point alloy of comparative example 1 is relatively simple in composition and contains a relatively large amount of B, zr as a melting point depressant element, which is unavoidable to form boride and nickel-zirconium eutectic; compared with the melting temperature 1120-1160 ℃ in the invention, the melting temperature in the comparative examples 2-5 is 1205-1232 ℃, the gap is obvious, the nickel-based alloy with the heat treatment temperature below 1200 ℃ cannot be repaired, otherwise, the risk of primary melting of the alloy exists. If the maximum heat treatment temperature is required to be not more than 1190+/-10 ℃ for the large-size MarM247 superalloy component, primary melting of the alloy can be induced, because the MarM247 alloy contains Hf element, a Ni5Hf eutectic structure is easy to form at the casting solidification end, and the eutectic melting point is low. Furthermore, the repair temperature is typically 50 ℃ above the melting point to ensure adequate fluidity, and the solidus temperature of the control is 1205 ℃, which is beyond the heat treatment temperature limit of most prior nickel-based superalloys if the repair temperature is increased by 50 ℃ in consideration of adequate fluidity. In comparative examples 2 and 3, ti is an extremely easily oxidized element, and excessive Ti content causes oxidation in a vacuum furnace for industrial application in the heating process, which seriously affects the alloy process performance. In comparative example 4, the Mo content reached 14%, and too high a Mo content addition easily induced precipitation of the TCP phase. Comparative example 5 contains Mn element, which is not considered as a strengthening element in the superalloy. The melting point in the above table refers to the liquidus temperature of the alloy.
Specific embodiments of additive repair of MarM247 superalloy components
The present embodiment adopts the activated diffusion agent in embodiment 4, and the present invention specifically includes the following steps:
preparing an activated diffusion agent: according to the mass parts, 10 parts of raw materials Cr, 2.8 parts of W, 25 parts of Co, 12.6 parts of Ta, 6.3 parts of Mo, 8.1 parts of Ti, 3.2 parts of Nb, 3.2 parts of Al, 0.3 part of Re and 28.5 parts of Ni are prepared into an activated dispersing agent with the powder granularity of 5-80 mu m by an atomization method;
and (3) material adding and repairing:
step A1: according to the mass parts, 30 parts of an activated dispersing agent, 65 parts of MarM247 alloy plastic powder and 5 parts of an organic binder are uniformly mixed in proportion to prepare a pasty repairing material;
step B1: polishing and brightening the area to be repaired by using a hard alloy cutter, cleaning the area to be repaired by using acetone, coating a repair material on the area to be repaired of the component, wherein the size of the area to be repaired is length, width, depth=30 mm, 15mm, 2mm, and shaping the repair material;
step C1: placing the member in vacuum degree of 10 -2 Heating to 1190 ℃ at a speed of 10 ℃/min in a vacuum heat treatment furnace of Pa and above, preserving heat for 3 hours, and cooling to room temperature along with the furnace after the heat preservation is finished;
step D1: machining and polishing the redundant material adding repair area of the workpiece to restore the size;
step E1: the sintered area was ground and polished for PT or FPT inspection and defect free indication.
The attached figures 3 and 4 are the macroscopic structure morphology and the microscopic structure morphology after the additive repair respectively, and can be seen that the microscopic structure characteristics of the repaired area after the additive repair are gamma phase, gamma 'phase, gamma+gamma' eutectic and carbide, and the microstructure has the microscopic structure characteristics consistent with that of high-temperature alloy, and does not contain brittle phases such as boride; as shown in FIG. 5, after the additive repairing, the room temperature tensile strength of the repairing area is not lower than 830MPa, and the high temperature tensile strength of 900 ℃ is not lower than 520MPa.
Of course, in this embodiment, the plastic powder may be added in any proportion of 30-65 parts, and the effect of the present invention can be achieved. In other embodiments, too little addition of the plastic powder does not function to bring the composition of the repair material as close as possible to the composition of the component to be repaired; in other embodiments, excessive addition of the plasticizer may affect the liquid phase flowability of the repair material and thus the repair performance.
Specific examples of IN738LC superalloy component transient liquid phase connection
The activated diffusion agent in the embodiment 5 is adopted in the embodiment, and the method specifically comprises the following steps:
preparing an activated diffusion agent: according to the mass parts, preparing an activated dispersing agent with powder granularity of 10-53 mu m by an atomization method by using 16 parts of raw materials of Cr, 1.1 parts of W, 21 parts of Co, 12.6 parts of Ta, 6.5 parts of Mo, 8.4 parts of Ti, 3 parts of Nb, 3.2 parts of Al and 28.3 parts of Ni;
transient liquid phase connection:
step A2: uniformly mixing 90 parts of an activation dispersing agent and 10 parts of an organic binder according to the mass parts to prepare a pasty connecting material;
step B2: grinding the surface to be connected to be bright and smooth by adopting a grinder, and cleaning by using acetone to remove greasy dirt and oxide on the surface to be connected; coating a connecting material on the surfaces to be connected of the components, butting the surfaces to be connected of the two components, and controlling the butting gap to be 0.05 mu m;
step C2: placing the member in vacuum degree of 10 -2 Heating to 1200 ℃ at a speed of 3 ℃/min in a vacuum heat treatment furnace of Pa and above, preserving heat for 0.5h, and cooling along with the furnace after the heat preservation is finished.
Step D2: and polishing and shaping the overflowed superfluous metal.
FIG. 6 shows the microstructure of the joint after transient liquid phase joining of IN738LC components, showing that the microstructure formed by the joint gap forms only gamma phase, gamma' phase, carbide, and brittle phase without boride, and has microstructure characteristics consistent with superalloy.
The examples show only some specific examples, and IN fact other proportions within the scope of the invention are equally effective and can be applied to other precipitation-strengthened nickel-base cast superalloys such as CM247LC, IN939, MGA2400, GTD-111, GTD-222, etc. Of course, the active diffusion agent of the present invention can be used not only for additive repair or transient liquid phase connection, but also for crack repair or conventional brazing or large gap brazing.
The invention is not limited to the specific embodiments described above. The invention extends to any novel one, or any novel combination, of the features disclosed in this specification, as well as to any novel one, or any novel combination, of the steps of the method or process disclosed.
Claims (10)
1. An activated diffusion agent, characterized in that: each hundred parts of the composition comprises the following components in parts by mass: 10-16 parts of Cr, 0-3 parts of W, 20-26 parts of Co, 8-13 parts of Ta, 4-9 parts of Mo, 5-9 parts of Ti, 2-3.5 parts of Nb, 1.3-4 parts of Al, 0-3 parts of Re and the balance of Ni.
2. The activated diffusion agent of claim 1, wherein: the activated diffusion agent is in powder form, and the particle size of the powder is 10-106 mu m.
3. Use of an activated diffusion agent according to claim 1 or 2, characterized in that: the defects of the nickel-base superalloy component are additively repaired using a repair material comprising an activated diffuser and a moldable powder, wherein the moldable powder is the same composition as the nickel-base superalloy component.
4. The use of an activated diffuser as claimed in claim 3, wherein: the repairing material comprises the following components in parts by mass: 30-65 parts of activated dispersing agent, 30-65 parts of plastic powder and 5-20 parts of adhesive.
5. The use of an activated diffuser as set forth in claim 4, wherein: the additive repairing comprises the following steps:
step A1: uniformly mixing the activated diffusant, the plastic powder and the binder according to a proportion to prepare a pasty repairing material;
step B1: coating a repair material on a region to be repaired of the component, and shaping the repair material;
step C1: and (3) placing the component into a vacuum heat treatment furnace, heating to 1190-1230 ℃, preserving heat for 1-3 h, and cooling to room temperature after the heat preservation is finished.
6. The use of an activated diffuser as set forth in claim 5, wherein: in the step C1, the temperature rising speed is not higher than 16.8 ℃/min.
7. Use of an activated diffusion agent according to claim 1 or 2, characterized in that: a joining material containing an activated diffusion agent is used for transient liquid phase joining between nickel-base superalloy components.
8. The use of an activated diffuser as set forth in claim 7 wherein: the connecting material comprises the following components in parts by mass: 80-95 parts of an activation dispersing agent and 5-20 parts of a binder.
9. The use of an activated diffuser as set forth in claim 7 wherein: the transient liquid phase connection comprises the following steps:
step A2: uniformly mixing the activated dispersing agent and the adhesive according to a proportion to prepare a pasty connecting material;
step B2: coating a connecting material on the surfaces to be connected of the components, and butting the surfaces to be connected of the two components;
step C2: and (3) placing the component into a vacuum heat treatment furnace, heating to 1190-1230 ℃, preserving heat for 0.5-3 h, and cooling to room temperature after the heat preservation is finished.
10. Use of an activated diffusion agent according to claim 1 or 2, characterized in that: crack repair materials comprising an activated diffusion agent are used for crack repair of nickel-base superalloy components.
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| CN115446494B (en) * | 2022-09-20 | 2024-03-22 | 中国航发北京航空材料研究院 | NiCoCrNbTiAl high-entropy alloy brazing material for high-temperature alloy brazing connection |
| CN115927917A (en) * | 2022-12-21 | 2023-04-07 | 东方电气集团东方汽轮机有限公司 | high-W, mo-content nickel-based superalloy powder and application thereof, repairing agent and preparation thereof, and alloy repairing method |
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