CN112570876A - GH4141 nickel-based superalloy vacuum electron beam welding method - Google Patents

GH4141 nickel-based superalloy vacuum electron beam welding method Download PDF

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Publication number
CN112570876A
CN112570876A CN202011160424.6A CN202011160424A CN112570876A CN 112570876 A CN112570876 A CN 112570876A CN 202011160424 A CN202011160424 A CN 202011160424A CN 112570876 A CN112570876 A CN 112570876A
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China
Prior art keywords
welding
nickel
electron beam
vacuum electron
steps
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CN202011160424.6A
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CN112570876B (en
Inventor
韦宝权
马超
李生智
褚依辉
谯永鹏
庄园
郝运
王付民
赵磊
张庆锋
祝影
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SHENYANG FUCHUANG PRECISION EQUIPMENT CO Ltd
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SHENYANG FUCHUANG PRECISION EQUIPMENT CO Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K15/00Electron-beam welding or cutting
    • B23K15/06Electron-beam welding or cutting within a vacuum chamber
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K15/00Electron-beam welding or cutting
    • B23K15/0046Welding
    • B23K15/0053Seam welding

Abstract

The invention discloses a GH4141 nickel-based superalloy vacuum electron beam welding method. The problem of cracks generated in the welding process of GH4141 is solved, and the welding deformation is small. GH4141 nickel-based high-temperature alloy, a lap joint structure, no filler metal, a vacuum electron beam welding process and double-sided welding lines. And (3) before welding, the GH4141 is degreased and cleaned, and surface pollutants are removed. And (5) performing double-sided welding, and completing three times of welding. Butt weld spot welding, lap fillet weld fusion welding, and butt weld fusion welding. The air is filled with filtered air and cooled. After the welding is finished, vacuum heat treatment is carried out, and the temperature is kept at 650 ℃ for 4 hours. After the heat treatment, an X-ray inspection was performed. Machining the surface of the welding bead, cleaning the test piece and carrying out X-ray inspection. High welding efficiency, uniform and stable forming, small welding deformation, no crack, air hole, no fusion and other defects.

Description

GH4141 nickel-based superalloy vacuum electron beam welding method
Technical Field
The invention relates to the field of electron beam welding processes, in particular to a GH4141 nickel-based superalloy vacuum electron beam welding process.
Background
GH4141 is precipitation hardening type nickel-based wrought superalloy, and has good tensile strength, creep strength and oxidation resistance at a high temperature stage. Because of good high-temperature performance, the high-temperature-resistant rubber is suitable for the aerospace field and is widely applied. The cold-formability is good in an annealed state, and the weldability is good, but the welded part is likely to crack during heat treatment.
The traditional welding process method has the advantages of non-centralized heat, low welding efficiency, large part deformation, easy oxidation of welding beads and easy generation of welding defects. The aerospace field has high requirements on welding quality, and particularly, welding defects of parts and components which are in service at high temperature are one of important ways for product failure. In the vacuum electron beam welding process, parts are welded in a vacuum state, so that the pollution of the surrounding environment to a welding bead is greatly reduced, and the purity of welding metal is high; the welding parameter adjustment precision is high, the product quality stability and repeatability are high, the welding process is extremely stable, and the shape of a molten pool is easy to control; because the welding environment is in a vacuum state, the heat dissipation conditions of the parts are greatly different from those of the traditional welding; the welding energy of the vacuum electron beam is concentrated, the welding heat affected zone is small, the deformation is small, the groove is not formed in one-step welding forming, and the factors affecting the welding quality between the layers are reduced.
GH4141 welding crack is less researched at present, and the main solution is focused on the post-welding heat treatment process means, and the probability of generating crack is reduced through proper heat treatment process. The occurrence of thermal cracking is due to stress and liquid films, and therefore, reducing the stress level thereof is one of the important means for solving the welding thermal cracking.
The GH4141 high-temperature alloy is welded by a vacuum electron beam welding method for three times, the weld joint surface is formed uniformly, and the defects of cracks, pores, non-fusion and the like are overcome by matching with proper postweld heat treatment parameters and X-ray inspection.
Summary of the invention
The invention aims to provide a GH4141 nickel-based superalloy vacuum electron beam welding method which has the characteristics of small welding deformation, uniform weld joint forming, no crack, no air hole and no fusion.
In order to achieve the purpose, the invention adopts the technical scheme that:
a GH4141 nickel-based high-temperature alloy vacuum electron beam welding method comprises the steps that a base material is GH4141, plate thicknesses are respectively 5mm and 9mm, a test piece needs to be degreased and cleaned before welding, butt weld joint tack welding, lap fillet weld fusion welding and butt weld fusion welding are respectively carried out, vacuum heat treatment is immediately carried out after welding, X-ray inspection is carried out after heat treatment, machining treatment is carried out on the surface of a weld joint after defect is confirmed, and finally X-ray inspection is carried out on the test piece again.
The invention has the advantages that:
the invention has the advantages of high welding efficiency, uniform and stable molding, small welding deformation, no crack, air hole, no fusion and other defects.
Drawings
FIG. 1 is a schematic view of the present invention applied to an unequal thickness plate lap weld.
FIG. 2 is a schematic view of the present invention applied to butt welds of unequal thickness plates.
Detailed Description
The invention is described in further detail with reference to the accompanying figures 1-2. The specific implementation steps are as follows:
the first step is as follows: and degreasing and cleaning GH4141 nickel and the high-temperature alloy, and drying the cleaned GH4141 nickel and the high-temperature alloy by using nitrogen.
And secondly, assembling the test pieces in an assembly mode, wherein the fit clearance is 0-0.2mm, and fixing two ends of the test pieces to an electron beam welding platform through a pressing plate.
Thirdly, vacuumizing the electron beam welding machine, and setting the spot welding parameters of the butt weld, which specifically comprises the following steps: the working distance is 1100mm, the high voltage is 150KV, the beam current is 8mA, the welding speed is 900mm/min, the focusing current is 2285mA, the amplification factor is 756, the beam deflection function is triangular, the swing amplitude in the X direction is 0.4mm, the swing amplitude in the Y direction is 0.4mm, and the function swing frequency is 350 HZ.
And fourthly, finishing vacuumizing and welding.
And fifthly, relieving the vacuum state, turning over the test piece, and enabling the lap fillet weld to be upward.
Sixthly, performing electron beam welding and vacuumizing, and setting fusion welding parameters of the lap fillet weld: the working distance is 500mm, the high voltage is 150KV, the beam current is 24mA, the welding speed is 900mm/min, the focusing current is 2515mA, the amplification factor is 1524, the beam deflection function shape is triangular, the swing amplitude in the X direction is 0.8mm, the swing amplitude in the Y direction is 0.8mm, and the function swing frequency is 350 HZ.
And step seven, finishing vacuumizing and welding.
And eighthly, removing the vacuum state, turning over the test piece, and enabling the butt weld to face upwards.
Ninth, electron beam welding is vacuumized, and butt weld fusion welding parameters are set: the working distance is 1100mm, the high voltage is 150KV, the beam current is 28mA, the welding speed is 900mm/min, the focusing current is 2285mA, the amplification factor is 756, the beam deflection function is triangular, the swing amplitude in the X direction is 0.4mm, the swing amplitude in the Y direction is 0.4mm, and the function swing frequency is 350 HZ. The air is filled with filtered air and cooled.
And step ten, completing welding and relieving the vacuum state.
And step ten, carrying out vacuum heat treatment, setting heat treatment parameters at 650 ℃ and keeping the temperature for 4 hours.
And a twelfth step of performing X-ray inspection after the heat treatment is finished.
And step thirteen, machining the surface of the welding bead, and cleaning the machined test piece.
And step fourteen, X-ray inspection. The X-ray detection shows that the welding defects such as cracks, pores, incomplete fusion and the like are avoided.
The method is not limited to the plane welding seam, and can be applied to welding of circumferential welding seam products.

Claims (10)

1. A GH4141 nickel-based superalloy vacuum electron beam welding method, the form of the welded joint is a plate pair lap joint type with different thicknesses, and the butt weld is not divided into grooves, and is obliquely connected with the interface at an angle of 0-10 degrees; the lap joint width is 2-5mm, and the lap joint thickness is 4-6 mm; the method is characterized in that:
three times of welding are adopted for completing the welding, namely butt weld spot welding, fillet weld fusion welding and butt weld fusion welding;
degreasing and cleaning the steel plate before welding to remove oil stains on the surface.
2. The GH4141 nickel-base superalloy vacuum electron beam welding method according to claim 1, wherein the method comprises the following steps:
the welding material is GH4141 but is not limited to the material, austenitic stainless steel, GH4169 can be produced according to the process.
3. The GH4141 nickel-base superalloy vacuum electron beam welding method according to claim 1, wherein the method comprises the following steps:
the butt welding seam spot welding adopts the working distance of 1100mm, the high voltage of 150KV, the beam current of 8mA, the welding speed of 900mm/min, the focusing current of 2285mA, the amplification factor of 756, the beam deflection function shape of triangle, the swing amplitude of 0.4mm in the X direction, the swing amplitude of 0.4mm in the Y direction and the function swing frequency of 350 HZ.
4. The GH4141 nickel-base superalloy vacuum electron beam welding method according to claim 1, wherein the method comprises the following steps:
the lap fillet weld fusion welding adopts the working distance of 500mm, the high voltage of 150KV, the beam current of 24mA, the welding speed of 900mm/min, the focusing current of 2515mA, the amplification factor of 1524, the beam deflection function shape of triangle, the swing amplitude of 0.8mm in the X direction, the swing amplitude of 0.8mm in the Y direction and the function swing frequency of 350 HZ.
5. The GH4141 nickel-base superalloy vacuum electron beam welding method according to claim 1, wherein the method comprises the following steps:
the butt weld fusion welding adopts the working distance of 1100mm, the high voltage of 150KV, the beam current of 28mA, the welding speed of 900mm/min, the focusing current of 2285mA, the amplification factor of 756, the beam deflection function shape of triangle, the swing amplitude of 0.4mm in the X direction, the swing amplitude of 0.4mm in the Y direction and the function swing frequency of 350 HZ.
6. The GH4141 nickel-base superalloy vacuum electron beam welding method according to claim 1, wherein the method comprises the following steps:
and after each welding is finished, filling filtered air into the welding furnace, and cooling the welding furnace.
7. The GH4141 nickel-base superalloy vacuum electron beam welding method according to claim 1, wherein the method comprises the following steps:
after the welding of the test piece is finished, the test piece is subjected to vacuum heat treatment and is kept at 650 ℃ for 4 hours.
8. The GH4141 nickel-base superalloy vacuum electron beam welding method according to claim 1, wherein the method comprises the following steps:
the thickness difference between the thick plate and the thin plate is 3-5mm, the penetration of butt weld is 6-8mm, and the width of weld is 6-9 mm.
9. The GH4141 nickel-base superalloy vacuum electron beam welding method according to claim 1, wherein the method comprises the following steps:
the double-sided welding has small deformation, partial overlapping of molten pools of two welding passes reduces the generation of defects of crack sources, and stress concentration points are reduced.
10. The GH4141 nickel-base superalloy vacuum electron beam welding method according to claim 1, wherein the method comprises the following steps:
when the butt welding seam is welded, the test piece is welded in a restrained state, then the two fusion welding seams are welded, and the test piece is welded in a free state.
CN202011160424.6A 2020-10-27 2020-10-27 GH4141 nickel-based superalloy vacuum electron beam welding method Active CN112570876B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113263258A (en) * 2021-04-09 2021-08-17 成都先进金属材料产业技术研究院股份有限公司 Welding method and welding device for nickel-based alloy pipe

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EP1116545A1 (en) * 1999-12-17 2001-07-18 Lufthansa Technik AG Joining of single crystal turbine parts
CN106392293A (en) * 2016-11-08 2017-02-15 北京星航机电装备有限公司 Vacuum electron beam welding method for refractory alloy
CN108161204A (en) * 2017-12-04 2018-06-15 北京星航机电装备有限公司 A kind of 3D printing high temperature alloy pipeline structure electrical beam welding method
CN109175657A (en) * 2018-10-30 2019-01-11 首都航天机械有限公司 A kind of electro-beam welding method of big thickness tilt angle weld seam
CN110757019A (en) * 2019-11-27 2020-02-07 山西汾西重工有限责任公司 Step-by-step combined welding structure and welding method for rectangular frame with large length-width ratio
CN111283315A (en) * 2020-03-30 2020-06-16 沈阳富创精密设备有限公司 Vacuum electron beam welding method for single-side welding and double-side forming of titanium alloy cylinder
CN111702317A (en) * 2020-06-30 2020-09-25 中国航发动力股份有限公司 Electron beam welding method for double-sided planet weld joint structure

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1116545A1 (en) * 1999-12-17 2001-07-18 Lufthansa Technik AG Joining of single crystal turbine parts
CN106392293A (en) * 2016-11-08 2017-02-15 北京星航机电装备有限公司 Vacuum electron beam welding method for refractory alloy
CN108161204A (en) * 2017-12-04 2018-06-15 北京星航机电装备有限公司 A kind of 3D printing high temperature alloy pipeline structure electrical beam welding method
CN109175657A (en) * 2018-10-30 2019-01-11 首都航天机械有限公司 A kind of electro-beam welding method of big thickness tilt angle weld seam
CN110757019A (en) * 2019-11-27 2020-02-07 山西汾西重工有限责任公司 Step-by-step combined welding structure and welding method for rectangular frame with large length-width ratio
CN111283315A (en) * 2020-03-30 2020-06-16 沈阳富创精密设备有限公司 Vacuum electron beam welding method for single-side welding and double-side forming of titanium alloy cylinder
CN111702317A (en) * 2020-06-30 2020-09-25 中国航发动力股份有限公司 Electron beam welding method for double-sided planet weld joint structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113263258A (en) * 2021-04-09 2021-08-17 成都先进金属材料产业技术研究院股份有限公司 Welding method and welding device for nickel-based alloy pipe
CN113263258B (en) * 2021-04-09 2022-05-24 成都先进金属材料产业技术研究院股份有限公司 Welding method and welding device for nickel-based alloy pipe

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