CN102672163A - Powdery interlayer material for liquid-phase diffusion bonding of GH4169 high-temperature alloy and preparation method of same - Google Patents
Powdery interlayer material for liquid-phase diffusion bonding of GH4169 high-temperature alloy and preparation method of same Download PDFInfo
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Abstract
The invention provides a powdery interlayer material for liquid-phase diffusion bonding of a GH4169 high-temperature alloy and a preparation method of the same, and relates to interlayer materials for the liquid-phase diffusion bonding and preparation method thereof. The problems on many brittle compounds, nonuniformity in components, poor compatibility of a connector and a parent material, difficulty in harmony of post-heat treatment process and heat treatment process of the parent material and incapability of meeting high requirements under room-temperature and high-temperature environments in the prior art are to be solved in the invention. The powdery interlayer material is prepared from primary elements Ni, Cr and Fe with the addition of melting-point lowering elements Si and B as well as enhancing elements Nb, Ti and Mo by adopting a high-performance ball milling process. The preparation method provided by the invention is free from pollution of processing oxidation and wetting agent; the prepared powdery interlayer material has the advantages of low content of foreign matters, high purity, uniform melting and good flowability; the prepared material is applicable to a liquid-phase diffusion bonding connector of the GH4169 high-temperature alloy; and the obtained bonding product has the characteristics of high tensile strength and good plasticity, and can meet requirements for high performances of the connector.
Description
Technical field
The present invention relates to a kind of Liquid Phase Diffusion and connect intermediate layer material and preparation method thereof.
Background technology
The GH4169 alloy is a Ni-Cr-Fe base ageing strengthening high temperature alloy; Occupy first of the high temperature alloy in the intensity below 650 ℃; And have good thermal fatigue resistance, anti-oxidant, radioresistance and hot and cold processing characteristics, be widely used in critical aircraft engine parts, aviation and ground with the turbine disk, the manufacturing of forging compressor blade, securing member, engine shaft, engine chamber, jet pipe.Wherein the quality of many parts to increase work efficiency, guarantee reliability and security, to promote overall performance most important comprehensively.Thereby the complex component that the GH4169 high temperature alloy is made connects just to become to be made a very important step of high performance unit, and Aero-Space are to reach 90% of postwelding mother metal to the requirement of high temperature alloy jointing mechanical property.Liquid Phase Diffusion connect compare with other method of attachment have that the joint distortion amount is little, structural constituent evenly, performance is near advantages such as mother metals, become to connect the most suitable method of GH4169 alloy component.
But there is following problem in the intermediate layer material that is used to connect nickel base superalloy at present:
1, Ni-Cr-B or Ni-Cr-Si intermediate layer material are prone in the joint interface form more boride or silicide, cause joint performance seriously to descend, and it is all relatively low no matter room temperature still is an elevated temperature strength, can't satisfy the high request to performance;
2, the Ni-Cr-Si-B intermediate layer material is good to the wetability of nickel base superalloy; Frangible compounds is less relatively in the joint interface; But the element distribution is even inadequately in the whole joint, and joint and mother metal composition compatibility are relatively poor, and performance has certain gap; And the joint mechanical behavior under high temperature can not meet the demands, and particularly under hot environment, can not guarantee security;
3, connect the joint that nickel base superalloy obtained for Ni-based intermediate layer material commonly used, Technology for Heating Processing is chosen difficulty, especially realizes the recovery of performance synchronously and strengthens very difficulty with mother metal.
Summary of the invention
The present invention will solve that existing GH4169 high temperature alloy Liquid Phase Diffusion jointing frangible compounds is many, uneven components, joint are poor with the mother metal compatibility, the after-baking difficult technique is with the problem that is in harmonious proportion mutually with the mother metal Technology for Heating Processing, performance can't satisfy high request under room temperature and hot environment, and powder intermediate layer material that a kind of GH4169 of being used for high temperature alloy Liquid Phase Diffusion connects and preparation method thereof is provided.
The present invention is used for powder intermediate layer material that GH4169 high temperature alloy Liquid Phase Diffusion connects and is processed by 50.5%～52.5% Ni powder, 16.7～17.5% Cr powder, 16.2%～17.5% Fe powder, 4.0～5.0% Si powder, 1.75%～2.2% B powder, 4.7%～5.7% Nb powder, 0.85%～1.05% Ti powder and 2.7%～3.0% Mo powder by weight percentage.
The powder intermediate layer preparation methods that the above-mentioned GH4169 of being used for high temperature alloy Liquid Phase Diffusion connects is carried out according to the following steps:
One, takes by weighing 50.5%～52.5% Ni powder, 16.7～17.5% Cr powder, 16.2%～17.5% Fe powder, 4.0～5.0% Si powder, 1.75%～2.2% B powder, 4.7%～5.7% Nb powder, 0.85%～1.05% Ti powder and 2.7%～3.0% Mo powder by weight percentage, mix obtaining alloy powder;
Two, the alloy powder and the abrading-ball that step 1 are obtained place the high-energy ball milling jar; Vacuumize the back and in ball grinder, charge into argon gas; With the rotating speed of 250～350r/min, ball milling 4～20h obtains being used for the powder intermediate layer material that GH4169 high temperature alloy Liquid Phase Diffusion connects.
In the prepared intermediate layer material of the present invention; Ni, Cr, Fe are matrix element; The matrix element proportioning is similar in its proportioning and the GH4169 high temperature alloy mother metal; This has just significantly reduced the homogenization time of three kinds of matrix elements in the isothermal solidification process, can in the relatively short time, obtain and the higher joint of mother metal compatibility; One of molten element falls in Si, can improve its wettability, and it is evenly distributed on joint area, to a certain degree lifting sub plasticity; B topmostly in the prepared intermediate layer material of the present invention falls molten element, not only can improve its wettability, especially element dissolving in the connection procedure, the topmost effect element of diffusion; Nb, Ti, Mo strengthen element, are used in connection procedure, forming and the identical wild phase of high temperature alloy hardening constituent composition, improve the intensity of weld seam.Even, the advantages such as purity is high, good fluidity of the intermediate layer material composition of gained of the present invention.Take in the middle of banjo fixing butt jointing, to tile and preset the intermediate layer material mode; Diffusion connects when temperature is 1150～1180 ℃ can obtain complete GH4169 high temperature alloy Liquid Phase Diffusion jointing, and joint has excellent mechanical property, and the percentage elongation of postwelding joint reaches more than 50%; Showing that element in the joint distributes reaches the uniformity of higher degree with mother metal; Joint room temperature tensile strength is up to 95.7% of postwelding mother metal after the heat treatment, and percentage elongation can reach 10%, 650 ℃ of elevated temperature strength can reach 93.2% of postwelding mother metal; Show that the GH4169 joint that adopts this intermediate layer material to obtain has the Technology for Heating Processing that is complementary with mother metal; Satisfy the performance requirement that butt joint intensity reaches postwelding mother metal 90%, have that room temperature and high temperature tensile strength are high, plasticity is good, can satisfy the performance requirement that docks head height.
Powder intermediate layer material preparation method among the present invention smelts with Traditional use or the method for preparing intermediate layer material of sintering is compared; Employed method of the present invention is not processed the pollution of oxidation and wetting agent; Prepared powder intermediate layer impurities of materials content is few; Purity is high, and fusing is even, good fluidity.
The Liquid Phase Diffusion that the powder intermediate layer material that Liquid Phase Diffusion provided by the present invention connects is used for the GH4169 high temperature alloy connects.
Description of drawings
Fig. 1 is the secondary electron scanned photograph of the microscopic appearance that is used for the powder intermediate layer material that GH4169 high temperature alloy Liquid Phase Diffusion connects of embodiment one preparation;
Fig. 2 is the interface microstructure pattern of the Liquid Phase Diffusion jointing of the test two sheet material samples that obtain;
Fig. 3 is the photo of the tensile sample of the test two sheet material samples that obtain;
Fig. 4 for test three three sample heat treatments making before with heat treatment after photo.
The specific embodiment
Technical scheme of the present invention is not limited to the following cited specific embodiment, also comprises the combination in any between each specific embodiment.
The specific embodiment one: this embodiment is used for powder intermediate layer material that GH4169 high temperature alloy Liquid Phase Diffusion connects and is processed by 50.5%～52.5% Ni powder, 16.7～17.5% Cr powder, 16.2%～17.5% Fe powder, 4.0～5.0% Si powder, 1.75%～2.2% B powder, 4.7%～5.7% Nb powder, 0.85%～1.05% Ti powder and 2.7%～3.0% Mo powder by weight percentage.
Preferred scheme is in this embodiment: be used for powder intermediate layer material that GH4169 high temperature alloy Liquid Phase Diffusion connects and processed by 50.7%～51.93% Ni powder, 16.9～17.0% Cr powder, 16.5%～17.0% Fe powder, 4.2～4.3% Si powder, 1.82%～1.9% B powder, 4.9%～5.2% Nb powder, 0.95%～1.0% Ti powder and 2.8%～2.9% Mo powder by weight percentage.
Utilize the powder intermediate layer material of this embodiment; Take in the middle of banjo fixing butt jointing, to tile and preset the intermediate layer material mode; When diffusion connection temperature is 1150～1180 ℃, can obtain complete GH4169 high temperature alloy Liquid Phase Diffusion jointing, joint has excellent mechanical property, and the percentage elongation of postwelding joint reaches more than 50%; Showing that element in the joint distributes reaches the uniformity of higher degree with mother metal; Joint room temperature tensile strength is up to 95.7% of postwelding mother metal after the heat treatment, and percentage elongation can reach 10%, 650 ℃ of elevated temperature strength can reach 93.2% of postwelding mother metal; Show that the GH4169 joint that adopts this intermediate layer material to obtain has the Technology for Heating Processing that is complementary with mother metal, satisfies the performance requirement that butt joint intensity reaches postwelding mother metal 90%.
The specific embodiment two: what this embodiment and the specific embodiment one were different is: be used for powder intermediate layer material that GH4169 high temperature alloy Liquid Phase Diffusion connects and processed by 51.63% Ni powder, 17.2% Cr powder, 16.5% Fe powder, 4% Si powder, 2% B powder, 5.0% Nb powder, 0.87% Ti powder and 2.8% Mo powder by weight percentage.Other is identical with the specific embodiment one.
The specific embodiment three: what this embodiment was different with the specific embodiment one or two is: be used for powder intermediate layer material that GH4169 high temperature alloy Liquid Phase Diffusion connects and processed by 51.47% Ni powder, 17.0% Cr powder, 16.63% Fe powder, 4% Si powder, 2% B powder, 5.1% Nb powder, 0.91% Ti powder and 2.89% Mo powder by weight percentage.Other is identical with the specific embodiment one or two.
The specific embodiment four: this embodiment is used for the powder intermediate layer preparation methods of GH4169 high temperature alloy Liquid Phase Diffusion connection to carry out according to the following steps:
One, takes by weighing 50.5%～52.5% Ni powder, 16.7～17.5% Cr powder, 16.2%～17.5% Fe powder, 4.0～5.0% Si powder, 1.75%～2.2% B powder, 4.7%～5.7% Nb powder, 0.85%～1.05% Ti powder and 2.7%～3.0% Mo powder by weight percentage, mix obtaining alloy powder;
Two, the alloy powder and the abrading-ball that step 1 are obtained place the high-energy ball milling jar; Vacuumize the back and in ball grinder, charge into argon gas; With the rotating speed of 250～350r/min, ball milling 4～20h obtains being used for the powder intermediate layer material that GH4169 high temperature alloy Liquid Phase Diffusion connects.
Utilize the powder intermediate layer material of this embodiment preparation; Take in the middle of banjo fixing butt jointing, to tile and preset the intermediate layer material mode; When diffusion connection temperature is 1150～1180 ℃, can obtain complete GH4169 high temperature alloy Liquid Phase Diffusion jointing, joint has excellent mechanical property, and the percentage elongation of postwelding joint reaches more than 50%; Showing that element in the joint distributes reaches the uniformity of higher degree with mother metal; Joint room temperature tensile strength is up to 95.7% of postwelding mother metal after the heat treatment, and percentage elongation can reach 10%, 650 ℃ of elevated temperature strength can reach 93.2% of postwelding mother metal; Show that the GH4169 joint that adopts this intermediate layer material to obtain has the Technology for Heating Processing that is complementary with mother metal, satisfies the performance requirement that butt joint intensity reaches postwelding mother metal 90%.
The specific embodiment five: what this embodiment and the specific embodiment four were different is: the quality purity of said Ni powder, Cr powder, Fe powder, Nb powder, Ti powder and Mo powder is 99%～99.95%.Other is identical with the specific embodiment four.
The specific embodiment six: what this embodiment was different with the specific embodiment four or five is: the quality purity of said Si powder and B powder is 99%～99.9%.Other is identical with the specific embodiment four or five.
The specific embodiment seven: what this embodiment was different with one of specific embodiment four to six is: in the step 2 during ball milling ball material mass ratio be (8～20): 1, the filler ratio is 45%～55%.
In this embodiment, ball material mass ratio is meant the ratio of mill ball quality and alloy powder quality, and filler accounts for 45%～55% of ball grinder volume than 45%～55% for abrading-ball and alloy powder cumulative volume.
The specific embodiment eight: what this embodiment was different with one of specific embodiment four to seven is: the ball milling in the step 2 is intermittent ball milling, and the every running 0.5～2h of ball mill suspends 0.5～1h.Other is identical with one of specific embodiment four to seven.
The specific embodiment nine: what this embodiment was different with one of specific embodiment four to eight is: in the step 2, and with the rotating speed of 270～340r/min, intermittent ball milling 6～18h, ball material mass ratio is (10～18): 1.Other is identical with one of specific embodiment four to eight.
The specific embodiment ten: what this embodiment was different with one of specific embodiment four to nine is: in the step 2, and with the rotating speed of 280～320r/min, intermittent ball milling 10～15h, ball material mass ratio is (12～16): 1.Other is identical with one of specific embodiment four to nine.
Adopt following examples to verify beneficial effect of the present invention:
Embodiment one:
Present embodiment is used for the powder intermediate layer preparation methods of GH4169 high temperature alloy Liquid Phase Diffusion connection to carry out according to the following steps:
One, takes by weighing 51.63% Ni powder, 17.2% Cr powder, 16.5% Fe powder, 4% Si powder, 2% B powder, 5.0% Nb powder, 0.87% Ti powder and 2.8% Mo powder by weight percentage, mix obtaining alloy powder;
Two, the alloy powder and the abrading-ball that step 1 are obtained place the high-energy ball milling jar, vacuumize the back and in ball grinder, charge into argon gas, and with the rotating speed of 300r/min, ball milling 12h obtains being used for the powder intermediate layer material that GH4169 high temperature alloy Liquid Phase Diffusion connects; Wherein ratio of grinding media to material is that 12: 1, filler ratio are 44%.
Test one:
Get two GH4169 high temperature alloy mother metals that are of a size of 12mm * 12mm * 40mm, be soldered the surface and polish step by step, adopt ultrasonic washing instrument in acetone soln, to clean then with 400#, 500#, 600#, 800#, 1000# abrasive paper for metallograph; Utilize the powder intermediate layer material of embodiment one preparation; Take tiling to preset the intermediate layer material mode and connect two mother metals, connecting temperature in diffusion is to be incubated 1h under 1150 ℃ the condition, is warming up to 1180 ℃; Insulation 1h obtains sample one.
Test two: adopt electric spark wire cutting method, cut down from testing the sample one that obtains that thickness is the sheet material of 2mm, and sheet material specimen surface line cutting tool marks are polished, use the acetone ultrasonic cleaning clean then, obtain the sheet material sample with 80#～600# sand paper
Test three: other gets six GH4169 high temperature alloy mother metals that are of a size of 12mm * 12mm * 40mm, adopts the method for test one, makes 3 samples again; These 3 samples are heat-treated; At first, be cooled to 900 ℃ of insulation 4h again, be warming up to 980 ℃ of insulation 1h then at 1050 ℃ of insulation 1h; Be cooled to 718 ℃ of insulation 15h at last, accomplish heat treatment.
Said sample is tested, and the result is following:
Fig. 1 is the secondary electron scanned photograph of the microscopic appearance that is used for the powder intermediate layer material that GH4169 high temperature alloy Liquid Phase Diffusion connects of embodiment one preparation; As can beappreciated from fig. 1 the intermediate layer material powder particle size tiny, mix, analysis result shows that alloying does not almost take place powder in mechanical milling process.
Fig. 2 is the interface microstructure pattern of the Liquid Phase Diffusion jointing of the test two sheet material samples that obtain; Wherein, Article two, the dotted line position intermediate is a joint interface, as can be seen from the figure, does not have tangible compound to distribute in the joint interface; The joint element distributes very evenly, and weld seam and mother metal have reached the uniformity of height on structural constituent.
Fig. 3 is the photo of the tensile sample of the test two sheet material samples that obtain, 1 photo for sample before stretching, and 2 photos for the back sample that stretches, 3 is fracture position; As can be seen from Figure 3 very big plastic deformation can take place in joint and mother metal synchronously; Show that joint and mother metal have fabulous plasticity simultaneously; Reflect that from the side weld seam is consistent with the height of mother metal composition; Fracture occurs in far-end mother metal one side, explains through Weld Performance after the Thermal Cycle to be superior to mother metal; Adopt the powder intermediate layer material Liquid Phase Diffusion of embodiment one preparation to connect the GH4169 alloy, its joint room temperature percentage elongation can reach more than 50%;
Fig. 4 for test three three sample heat treatments making before with heat treatment after photo, three samples in the left side are the photo before the heat treatment, three samples in the right side are the photo after the heat treatment; As can be seen from the figure, postwelding does not have tangible intermediate layer residual in the workpiece docking site, does not have tangible corrosion behavior simultaneously, and the wetability of powder intermediate layer of the present invention and the demand that quality of connection can satisfy production fully are described.
The powder intermediate layer material Liquid Phase Diffusion that adopts embodiment one preparation is connected the GH4169 alloy-junction carry out post weld heat treatment; Joint room temperature tensile strength is up to 95.7% of postwelding mother metal after the heat treatment; Exceed 200～300MPa than GH4169 alloy diffusion jointing intensity in other reports; Joint plasticity still can reach 10%; 650 ℃ of elevated temperature strengths can reach 93.2% of postwelding mother metal; Basic suitable with postwelding mother metal elevated temperature strength, show that the powder intermediate layer material Liquid Phase Diffusion connection GH4169 alloy gained joint that adopts the present invention's preparation can cooperate the Technology for Heating Processing of GH4169 alloy itself fully, break GH4169 alloy jointing post weld heat treatment technology in the past and chosen the limitation that difficulty, joint overall performance are difficult to guarantee; Joint performance is very good after the heat treatment, can satisfy the requirement that Aero-Space butt joint mechanical property reaches postwelding mother metal 90% fully.
Claims (10)
1. one kind is used for the powder intermediate layer material that GH4169 high temperature alloy Liquid Phase Diffusion connects, and it is characterized in that being used for powder intermediate layer material that GH4169 high temperature alloy Liquid Phase Diffusion connects and is processed by 50.5%～52.5% Ni powder, 16.7～17.5% Cr powder, 16.2%～17.5% Fe powder, 4.0～5.0% Si powder, 1.75%～2.2% B powder, 4.7%～5.7% Nb powder, 0.85%～1.05% Ti powder and 2.7%～3.0% Mo powder by weight percentage.
2. a kind of powder intermediate layer material that GH4169 high temperature alloy Liquid Phase Diffusion connects that is used for according to claim 1 is characterized in that being used for powder intermediate layer material that GH4169 high temperature alloy Liquid Phase Diffusion connects and is processed by 51.63% Ni powder, 17.2% Cr powder, 16.5% Fe powder, 4% Si powder, 2% B powder, 5.0% Nb powder, 0.87% Ti powder and 2.8% Mo powder by weight percentage.
3. a kind of powder intermediate layer material that GH4169 high temperature alloy Liquid Phase Diffusion connects that is used for according to claim 1 is characterized in that being used for powder intermediate layer material that GH4169 high temperature alloy Liquid Phase Diffusion connects and is processed by 51.47% Ni powder, 17.0% Cr powder, 16.63% Fe powder, 4% Si powder, 2% B powder, 5.1% Nb powder, 0.91% Ti powder and 2.89% Mo powder by weight percentage.
4. the described a kind of method that is used for the powder intermediate layer material that GH4169 high temperature alloy Liquid Phase Diffusion connects of preparation claim 1 is characterized in that being used for the powder intermediate layer preparation methods that GH4169 high temperature alloy Liquid Phase Diffusion connects and carries out according to the following steps:
One, takes by weighing 50.5%～52.5% Ni powder, 16.7～17.5% Cr powder, 16.2%～17.5% Fe powder, 4.0～5.0% Si powder, 1.75%～2.2% B powder, 4.7%～5.7% Nb powder, 0.85%～1.05% Ti powder and 2.7%～3.0% Mo powder by weight percentage, mix obtaining alloy powder;
Two, the alloy powder and the abrading-ball that step 1 are obtained place the high-energy ball milling jar; Vacuumize the back and in ball grinder, charge into argon gas; With the rotating speed of 250～350r/min, ball milling 4～20h obtains being used for the powder intermediate layer material that GH4169 high temperature alloy Liquid Phase Diffusion connects.
5. a kind of powder intermediate layer material that GH4169 high temperature alloy Liquid Phase Diffusion connects that is used for according to claim 4, the quality purity that it is characterized in that said Ni powder, Cr powder, Fe powder, Nb powder, Ti powder and Mo powder is 99%～99.95%.
6. according to claim 4 or 5 described a kind of powder intermediate layer materials that GH4169 high temperature alloy Liquid Phase Diffusion connects that are used for, the quality purity that it is characterized in that said Si powder and B powder is 99%～99.9%.
7. a kind of powder intermediate layer preparation methods that GH4169 high temperature alloy Liquid Phase Diffusion connects that is used for according to claim 4, ball material mass ratio is (8～20) when it is characterized in that in the step 2 ball milling: 1, the filler ratio is 45%～55%.
8. a kind of powder intermediate layer preparation methods that GH4169 high temperature alloy Liquid Phase Diffusion connects that is used for according to claim 7 is characterized in that the ball milling in the step 2 is intermittent ball milling, and the every running 0.5～2h of ball mill suspends 0.5～1h.
9. according to claim 7 or 8 described a kind of powder intermediate layer preparation methods that GH4169 high temperature alloy Liquid Phase Diffusion connects that are used for; It is characterized in that in the step 2; With the rotating speed of 270～340r/min, intermittent ball milling 6～18h, ball material mass ratio is (10～18): 1.
10. a kind of powder intermediate layer preparation methods that GH4169 high temperature alloy Liquid Phase Diffusion connects that is used for according to claim 9; It is characterized in that in the step 2; With the rotating speed of 280～320r/min, intermittent ball milling 10～15h, ball material mass ratio is (12～16): 1.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105200269A (en) * | 2015-11-09 | 2015-12-30 | 东方电气集团东方汽轮机有限公司 | Interlayer alloy as well as preparation method and application method thereof |
| CN108788438A (en) * | 2018-06-29 | 2018-11-13 | 广东省焊接技术研究所（广东省中乌研究院） | A kind of TLP diffusion welding (DW)s middle layer alloy and its welding method |
| CN113234962A (en) * | 2021-05-12 | 2021-08-10 | 南昌大学 | Plasma cladding modified nickel-based high-temperature alloy coating for repairing surface and preparation method thereof |
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| US3718443A (en) * | 1971-01-22 | 1973-02-27 | Int Nickel Co | Composite metal products |
| CN101486134A (en) * | 2008-01-18 | 2009-07-22 | 中国科学院金属研究所 | Welding material special for GH4169 high-temperature alloy pipe material |
| CN101497953A (en) * | 2008-01-30 | 2009-08-05 | 中国科学院金属研究所 | Central layer alloy for transient liquid phase connection nickel based single crystal high-temperature alloy and preparation |
| CN102251153A (en) * | 2011-07-06 | 2011-11-23 | 西安理工大学 | Interlayer alloy of DD6 nickel-based single crystal high temperature alloy used for transient liquid phase (TLP) bonding and preparation method thereof |
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| US3718443A (en) * | 1971-01-22 | 1973-02-27 | Int Nickel Co | Composite metal products |
| CN101486134A (en) * | 2008-01-18 | 2009-07-22 | 中国科学院金属研究所 | Welding material special for GH4169 high-temperature alloy pipe material |
| CN101497953A (en) * | 2008-01-30 | 2009-08-05 | 中国科学院金属研究所 | Central layer alloy for transient liquid phase connection nickel based single crystal high-temperature alloy and preparation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105200269A (en) * | 2015-11-09 | 2015-12-30 | 东方电气集团东方汽轮机有限公司 | Interlayer alloy as well as preparation method and application method thereof |
| CN108788438A (en) * | 2018-06-29 | 2018-11-13 | 广东省焊接技术研究所（广东省中乌研究院） | A kind of TLP diffusion welding (DW)s middle layer alloy and its welding method |
| CN113234962A (en) * | 2021-05-12 | 2021-08-10 | 南昌大学 | Plasma cladding modified nickel-based high-temperature alloy coating for repairing surface and preparation method thereof |
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