CN106134327B - A kind of vacuum electron beam welding method for large thickness magnesium alloy - Google Patents

A kind of vacuum electron beam welding method for large thickness magnesium alloy

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Publication number
CN106134327B
CN106134327B CN201010051241.0A CN201010051241A CN106134327B CN 106134327 B CN106134327 B CN 106134327B CN 201010051241 A CN201010051241 A CN 201010051241A CN 106134327 B CN106134327 B CN 106134327B
Authority
CN
China
Prior art keywords
welding
welded
joint
thickness
vacuum electron
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201010051241.0A
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Chinese (zh)
Inventor
姜坤
孟松
曾如川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Satellite Manufacturing Factory Co Ltd
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Beijing Satellite Manufacturing Factory Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Satellite Manufacturing Factory Co Ltd filed Critical Beijing Satellite Manufacturing Factory Co Ltd
Priority to CN201010051241.0A priority Critical patent/CN106134327B/en
Application granted granted Critical
Publication of CN106134327B publication Critical patent/CN106134327B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The invention discloses a kind of vacuum electron beam welding method for large thickness magnesium alloy, comprise the steps: that the joint of material to be welded is carried out to carry out trial assembly after machining joins; Treating joint, backing plate and the run-on tab surface of wlding material processes; Material to be welded after treatment is ressembled, and ensured fit-up gap and the unfitness of butt joint of joint; By solid in material to be welded relevant position to run-on tab and backing plate point, and welding point point is solid; Use vacuum electron beam welding method to treat wlding material and carry out the disposable welding that penetrates; Use vacuum electron beam welding method butt welded seam to carry out secondary remelting processing; Modifying weldering according to the material monolithic distortion to be welded situation butt welded seam back side processes. The present invention assembles and puts solid by secondary, ensure that fit-up gap and misalignment can meet the requirement of electron beam welding, and controlled well welding deformation. Use secondary remelting processing simultaneously, improved the microstructure of welded seam area, improved the mechanical performance of joint.

Description

A kind of vacuum electron beam welding method for large thickness magnesium alloy
Technical field
The invention belongs to high energy beam precision welding technical field, particularly a kind of for large thickness deformation magnesiumThe welding method of alloy.
Background technology
At present, the labyrinth of the most of aerospace crafts of China all adopts GTAW to complete welderingConnect manufacture. Along with the development of Future Satellite, metal structure diameter and wall thickness will increase, new material willTo more application, this traditional argon arc welding technique more and more can not meet the manufacture requirement of labyrinth,Must adopt advanced high energy beam welding technology.
At the welding field (as thickness exceedes 100mm) of large thickness metal structure, generally adopt general at presentThe method such as method or narrow gap welding that logical arc-welding multilayer is piled up completes welding, the welding point obtaining like thisInternal soundness is poor, welding deformation is large, and the production cycle is long. And vacuum electron beam welding technology belongs to firstEnter the one of high energy beam welding technology, its welding parameter is easy to realize mechanization, automation control, repeatsProperty, repeatability is good, the stability that can improve the quality of products, is especially applicable to the structure of the large gauge of welding.Generally speaking, adopt this technology to carry out the welding of large thickness metal structure, not only can improve the life of structureProduce efficiency and welding quality, and can improve the security reliability that structure is used.
But in the satellite load-carrying construction such as low rail remote sensing large platform satellite and large-scale truss platform satellite, not onlyNeed to complete the welding of large thickness metal structure, and mechanical performance, the precision etc. of butt joint all propose moreHigh requirement need to further improve and could realize in general vacuum electron beam welding technical foundation.Through retrieving domestic and international pertinent literature, have no other welding procedures of relevant this large thickness deformation magnesium alloyReport.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome the deficiencies in the prior art, provide a kind of high efficiency,The large thickness deformation magnesium alloy vacuum electro-beam welding method of high accuracy, high reliability.
Technical solution of the present invention is: a kind of vacuum electron beam welding side for large thickness magnesium alloyMethod, described large thickness is that thickness is greater than 100mm, key step is as follows:
(1) according to thickness, strength of welded joint and the inner matter of large thickness deformation magnesium alloy material to be weldedMeasure requirement, set voltage, electronic beam current and the speed of welding of vacuum electron beam welding by test;
(2) joint of material to be welded is machined to roughness and is not less than Ra3.2, and ensure to treatThe flatness of plumb joint fitting surface and perpendicularity≤0.2mm;
(3) treat wlding material and carry out trial assembly and join, the fit-up gap≤0.2mm of joint, unfitness of butt joint≤ 0.5mm;
(4) remove greasy dirt, oxide-film and the fifth wheel on joint, backing plate and the run-on tab surface of material to be welded;
(5) will ressemble through step (4) material to be welded after treatment, and ensure the assembling of jointGap≤0.2mm, unfitness of butt joint≤0.5mm;
(6) assembled the rear method by manual argon arc welding by solid at material to be welded to run-on tab and backing plate pointRelevant position, and by solid welding point point;
(7) adopt the technological specification parameter in step (1), use vacuum electron beam welding method to treatWlding material carries out the disposable welding that penetrates;
(8) weld the same weld procedure specification parameter of rear employing, used vacuum electron beam welding sideMethod butt welded seam carries out secondary remelting processing;
(9) modifies weldering processing according to the material monolithic to be welded distortion situation butt welded seam back side, connect ensureingGood mechanical performance is also controlled the welding deformation of joint.
Described method is further comprising the steps of: harmless to carry out ultrasonic wave through step (9) weld seam after treatmentDetect, according to testing result, the defect near face of weld is carried out to manual argon arc welding repairing, to darkerThe weld defect of position utilizes electron beam to repair.
Described run-on tab is selected the material identical with material to be welded with backing plate.
The present invention's beneficial effect is compared with prior art:
1, the present invention is adopting vacuum electron beam welding technology to being greater than the wrought magnesium alloy of 100mm thicknessBefore welding, assemble and put admittedly by secondary, ensure that fit-up gap and misalignment can meet electron beam weldingThe requirement connecing, and well controlled welding deformation.
2, the present invention is using vacuum electron beam welding to obtain after the welding point of better quality, to former weld seamAdopt secondary remelting processing, improved the microstructure of welded seam area, significantly improved welding pointImpact flexibility, thus the mechanical performance of joint improved.
3, the present invention is using vacuum electron beam welding to obtain after the welding point of better quality, after processingWeld seam carry out Ultrasonic Nondestructive, according to testing result, to carrying out hand near the defect of face of weldWork argon arc welding is repaired, and utilizes electron beam to repair to the weld defect of putting compared with deep-seated, has further reducedWelding deformation, has improved the precision of welding point.
4, the present invention, by the reasonable application and improvement to vacuum electronic welding technology, can widen magnesium alloy materialsIn the scope of application of satellite load-carrying member, promote satellite structure lightness, improve existing magnesium alloy frame simultaneouslyThe workmanship of frame load-carrying member, shortens the manufacturing cycle.
Brief description of the drawings
Fig. 1 is process flow diagram of the present invention;
Fig. 2 is material connection diagram to be welded in welding process of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing and example, the large thickness magnesium alloy electro-beam welding method of the present invention is done furtherlyBright, but should not limit the scope of the invention with this. Technological process of the present invention as shown in Figure 1.
In the present embodiment, material to be welded is the MB2 magnesium alloy materials of thickness 100mm.
1, prepare vacuum electron beam welder, require as mesohigh type electron-beam welder and possess disposable through weldingThe ability of the above magnesium alloy materials of 100mm thickness. What the present embodiment adopted is that French TECHMETA is trueThe LARA52 model electron-beam welder of sky electron beam welding equipment company development.
By welding procedure test, adjust the disposable welding condition that penetrates of electron beam of material to be welded:Operating voltage 60KV, electronic beam current 300mA, speed of welding 20m/h.
2, utilize the method for milling processing to carry out machining processes to the interface between two materials 1 to be welded,The roughness that ensures interface is not less than Ra3.2, flatness 0.2mm and perpendicularity 0.2mm.
3, the trial assembly that utilizes welding tooling to complete material 1 to be welded is joined, as shown in Figure 2, by fit-up gap andUnfitness of butt joint is controlled at respectively in 0.2mm and 0.5mm. Wherein, run-on tab 3 and composition backing 2 selectWith with material to be welded 1 with batch material, improve back of weld for striking, the blow-out of welding processThe shaping of part.
4, remove the greasy dirt on material 1 to be welded, backing plate 2 and run-on tab 3 surfaces by the method for physical cleaning,Remove the oxide-film on joint to be welded, backing plate 2 and run-on tab 3 surfaces by the method for mechanical curettage.
5, the requirement that preweld cleaning is joined according to trial assembly after completing is ressembled, and by fit-up gap and unfitness of butt jointBe controlled at respectively in 0.2mm and 0.5mm.
6, will draw outside the vacuum chamber of vacuum electron beam welder by the method for manual argon arc welding after having assembled2, arc plate 3 and backing plate are solid in the relevant position of material 1 to be welded, as shown in Figure 2, and in the solid process of some timeCarve the confined state of noting observing joint, and fastening welding tooling is full to ensure the assembly quality of joint at any timeThe requirement of foot electron beam welding.
7, electron-beam welder vacuum reaches after welding requirements, adopts little specification technological parameter: operating voltage60KV, electronic beam current 150mA, speed of welding 20m/h, according to the applied electron-beam welder of realityState difference can appropriately adjust putting solid parameter. The point that utilizes electron beam to complete joint is consolidated, and requires point solidPoint is evenly distributed, the about 100mm of length, spacing 100mm left and right.
8, push the vacuum chamber of electron-beam welder together with welding tooling after admittedly completing, vacuumize, soAccording to the technological specification parameter adopting in step (1), use vacuum electron beam welding method to treat wlding afterwardsMaterial carries out the disposable welding that penetrates.
9, weld the same weld procedure specification parameter butt welded seam of rear employing and carried out secondary remelting weldReason.
10, welded and found according to measurement result afterwards, member integrated distortion 2~3mm, so selectLess technological specification parameter: operating voltage 60KV, electronic beam current 100mA, speed of welding 20m/h,The butt welded seam back side is modified weldering and is processed, and modification is soldered Cheng Houjing measurement and finds that member integrated distortion is reduced to0.5~0.8mm, thus the welding deformation of welding point controlled.
11, utilize the mode of machining to remove weld seam front and back reinforcement to concordant with mother metal, thenEmploying possesses the Ultrasonic Nondestructive of the inner flaw detection ability of large thick metal material (120mm and more than)Equipment butt welded seam carries out Ultrasonic Nondestructive, according to testing result, the defect near face of weld is enteredRow manual argon arc welding is repaired, and utilizes electron beam to repair to the weld defect of putting compared with deep-seated.
By above step, realize the high-quality electricity of the MB2 magnesium alloy part to be welded of thickness 100mmThe welding of son bundle.
The present invention, by the reasonable application and improvement to vacuum electronic welding technology, can widen magnesium alloy materials and existThe scope of application of satellite load-carrying member, promotes satellite structure lightness, improves existing magnesium alloy frame simultaneouslyThe workmanship of load-carrying member, shortens the manufacturing cycle.
Certainly, each building block of the present invention, position relationship and connected mode are not being changed to its functionIn situation, the equivalent transformation carrying out or alternative, also falls into protection scope of the present invention.
The content not being described in detail in description of the present invention belongs to the known skill of professional and technical personnel in the fieldArt.

Claims (3)

1. for a vacuum electron beam welding method for large thickness magnesium alloy, described large thickness is that thickness is largeIn 100mm, it is characterized in that comprising the steps:
(1) according to thickness, strength of welded joint and the inner matter of large thickness deformation magnesium alloy material to be weldedMeasure requirement, set voltage, electronic beam current and the speed of welding of vacuum electron beam welding by test;
(2) joint of material to be welded is machined to roughness and is not less than Ra3.2, and ensure to treatThe flatness of plumb joint fitting surface and perpendicularity≤0.2mm;
(3) treat wlding material and carry out trial assembly and join, the fit-up gap≤0.2mm of joint, unfitness of butt joint≤ 0.5mm;
(4) remove greasy dirt, oxide-film and the fifth wheel on joint, backing plate and the run-on tab surface of material to be welded;
(5) will ressemble through step (4) material to be welded after treatment, and ensure the assembling of jointGap≤0.2mm, unfitness of butt joint≤0.5mm;
(6), after having assembled, by the method for manual argon arc welding, run-on tab and backing plate point are being treated to wlding admittedlyMaterial relevant position, and welding point point is solid;
(7) adopt the technological specification parameter in step (1), use vacuum electron beam welding method to treatWlding material carries out the disposable welding that penetrates;
(8) weld the same weld procedure specification parameter of rear employing, used vacuum electron beam welding sideMethod butt welded seam carries out secondary remelting processing;
(9) modifies weldering processing according to the material monolithic to be welded distortion situation butt welded seam back side, connect ensureingGood mechanical performance is also controlled the welding deformation of joint.
2. according to a kind of vacuum electron beam welding method for large thickness magnesium alloy of claim 1, itsBe characterised in that: the run-on tab in step (4) is selected the material identical with material to be welded with backing plate.
3. according to a kind of vacuum electron beam welding method for large thickness magnesium alloy of claim 1 or 2,It is characterized in that: described method is further comprising the steps of: to surpassing through step (9) weld seam after treatmentSound wave Non-Destructive Testing, according to testing result, carries out manual argon arc welding repairing to the defect near face of weld,Utilize electron beam to repair to the weld defect of putting compared with deep-seated.
CN201010051241.0A 2010-11-19 2010-11-19 A kind of vacuum electron beam welding method for large thickness magnesium alloy Expired - Fee Related CN106134327B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201010051241.0A CN106134327B (en) 2010-11-19 2010-11-19 A kind of vacuum electron beam welding method for large thickness magnesium alloy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201010051241.0A CN106134327B (en) 2010-11-19 2010-11-19 A kind of vacuum electron beam welding method for large thickness magnesium alloy

Publications (1)

Publication Number Publication Date
CN106134327B true CN106134327B (en) 2013-05-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106624320A (en) * 2016-11-24 2017-05-10 四川成发航空科技股份有限公司 Method for electron beam welding of hollow flat tube type parts
CN109262131A (en) * 2018-09-14 2019-01-25 北京航星机器制造有限公司 A kind of vacuum electron beam welding method of special-shaped complicated big thickness fuel compartment
CN111545890A (en) * 2020-04-02 2020-08-18 中国兵器科学研究院宁波分院 Vacuum electron beam welding method for magnesium alloy component

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106624320A (en) * 2016-11-24 2017-05-10 四川成发航空科技股份有限公司 Method for electron beam welding of hollow flat tube type parts
CN106624320B (en) * 2016-11-24 2019-12-06 四川成发航空科技股份有限公司 Method for welding hollow flat tube parts by electron beams
CN109262131A (en) * 2018-09-14 2019-01-25 北京航星机器制造有限公司 A kind of vacuum electron beam welding method of special-shaped complicated big thickness fuel compartment
CN111545890A (en) * 2020-04-02 2020-08-18 中国兵器科学研究院宁波分院 Vacuum electron beam welding method for magnesium alloy component

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Granted publication date: 20130508

Termination date: 20201119