CN106271173A - A kind of method eliminating titanium alloy electron beam weld nail tip defect - Google Patents
A kind of method eliminating titanium alloy electron beam weld nail tip defect Download PDFInfo
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- CN106271173A CN106271173A CN201610771152.0A CN201610771152A CN106271173A CN 106271173 A CN106271173 A CN 106271173A CN 201610771152 A CN201610771152 A CN 201610771152A CN 106271173 A CN106271173 A CN 106271173A
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- welding
- weld
- electron beam
- nail tip
- titanium alloy
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
- B23K31/125—Weld quality monitoring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K15/00—Electron-beam welding or cutting
- B23K15/0046—Welding
- B23K15/0053—Seam welding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quality & Reliability (AREA)
- Welding Or Cutting Using Electron Beams (AREA)
Abstract
The invention discloses a kind of method eliminating titanium alloy electron beam weld nail tip defect, in carrying out electron beam welding process, by increasing the oval function of one direction amplitude, unit interval internal beam current increases in same point residence time, aggravate the agitation effects of electron beam weld, in the way of crosscutting weld seam is scanned, eliminates weld seam nail tip defect.The present invention to grow than the circle of double width value or oval function, the position residence time of line same point in welded joints, and root of weld width increases substantially, advantageously in the elimination of root of weld defect.Simultaneously, this process can carry out Non-Destructive Testing and examination in the case of not removing technique seam, and once weld seam occurs, beyond the internal flaw beyond acceptance criteria, to carry out repair welding by former welding parameter, reduce repair welding risk, it is possible to reduce because repair welding causes the loss that part rejection brings.
Description
[technical field]
The invention belongs to welding technology field, relate to a kind of method eliminating titanium alloy electron beam weld nail tip defect.
[background technology]
During modern aeroengine manufactures, compressor rotor class part many employings vacuum electron beam welding technique is carried out even
Connecing, weldquality is the most reliable.At present, such part electro-beam welding process is mainly penetrated to weld by the mode that penetrates and wears with non-
Two kinds of processes of welding thoroughly, wherein, penetrate welding manner heat input energy big, and part deformation controls difficulty, simultaneously by rotor
Class design of part limits, and spatter is difficult to protect.Therefore, general employing non-penetrating electro-beam welding process.For titanium
Alloy material rotor class part, this process is easily generated nail tip defect at the root of weld, and existing process is at part
The back side increase technique seam thickness, by nail tip defect introduce welding seam in, postwelding is gone by the way of machining
Remove.But, weld seam finds the defect required beyond acceptance criteria through Non-Destructive Testing, goes owing to now part weld seam seam is machined
Removing, it is impossible to carry out repair welding by standard-required by former welding parameter, repair welding causes part rejection dangerous.
[summary of the invention]
It is an object of the invention to the shortcoming overcoming above-mentioned prior art, it is provided that a kind of titanium alloy electron beam weld that eliminates is followed closely
The method of point defect, uses the mode optimizing welding parameter to eliminate titanium alloy material part electron beam weld nail tip defect.
For reaching above-mentioned purpose, the present invention is achieved by the following technical solutions:
A kind of method eliminating titanium alloy electron beam weld nail tip defect, comprises the following steps:
1) choose the scanning function of oval waveform, require that Selection of Function hangs down according to welding line joint virtual condition and weld width
The amplitude in straight weld direction, the amplitude of parallel bead direction is set to 0；
2) rate of scanning is chosen according to speed of welding；Rate of scanning is less than 400Hz；
3) require to choose welding current and focus current according to weld diameter, joint thickness, weldering width, use non-penetrating welding
Technique carries out electron beam welding；
4) postwelding directly carries out Non-Destructive Testing and examination in the case of retaining welding seam.
The present invention is further improved by:
Described step 2) in, in the velocity interval of 8～20mm/s, frequency is that proportional relation is from 200～400Hz with it.
Compared with prior art, the method have the advantages that
The present invention is than the circle of double width value or oval function, the position residence time of line same point in welded joints
Growing, root of weld width increases substantially, advantageously in the elimination of root of weld defect.Meanwhile, this process can be
Carrying out Non-Destructive Testing and examination in the case of not removing technique seam, once lacking beyond the inside beyond acceptance criteria occurs in weld seam
Fall into, repair welding can be carried out by former welding parameter, reduce repair welding risk, it is possible to reduce because repair welding causes the damage that part rejection brings
Lose.
[accompanying drawing explanation]
Fig. 1 is former welding technique appearance of weld schematic diagram；
Fig. 2 is the process appearance of weld schematic diagram of invention.
[detailed description of the invention]
Below in conjunction with the accompanying drawings the present invention is described in further detail:
Seeing Fig. 2, the present invention eliminates the method for titanium alloy electron beam weld nail tip defect, is carrying out electron beam welding process
In, by increasing the oval function of one direction amplitude, unit interval internal beam current increases in same point residence time, aggravates
The agitation effects of electron beam weld, eliminates weld seam nail tip defect in the way of crosscutting weld seam is scanned.Specifically include following
Step:
1) choose the scanning function of oval waveform, require that Selection of Function hangs down according to welding line joint virtual condition and weld width
The amplitude in straight weld direction, the amplitude of parallel bead direction is set to 0.
2) rate of scanning is chosen according to speed of welding；In the velocity interval of 8～20mm/s, frequency is proportional relation with it
From 200～400Hz；
3) require choose welding current and focus on electricity according to weld diameter, joint thickness weld diameter, joint thickness, weldering width
Stream, takes non-penetrating welding procedure to carry out electron beam welding；
4) postwelding directly carries out Non-Destructive Testing and examination in the case of retaining welding seam.
As a example by aero-engine rotor class part: joint element thickness as 12.5mm, technique seam thickness 5mm, former
Welding procedure scan mode: scanning function is E1 circle function, amplitude DX=0.5, amplitude DY=0.5, frequency f=500, weld seam
Detection first-time qualification rate less than 80%, the welding procedure scan mode of the present invention: scanning function is that E2 is oval, amplitude DX=
1.4 amplitudes DY=0, frequency f=200, weld seam detection first-time qualification rate 100%, effect is notable.
Above content is only the technological thought that the present invention is described, it is impossible to limit protection scope of the present invention with this, every presses
The technological thought proposed according to the present invention, any change done on the basis of technical scheme, each fall within claims of the present invention
Protection domain within.
Claims (2)
1. the method eliminating titanium alloy electron beam weld nail tip defect, it is characterised in that comprise the following steps:
1) choose the scanning function of oval waveform, require Selection of Function vertical welding according to welding line joint virtual condition and weld width
The amplitude in seam direction, the amplitude of parallel bead direction is set to 0；
2) rate of scanning is chosen according to speed of welding；Rate of scanning is less than 400Hz；
3) require to choose welding current and focus current according to weld diameter, joint thickness, weldering width, use non-penetrating welding procedure
Carry out electron beam welding；
4) postwelding directly carries out Non-Destructive Testing and examination in the case of retaining welding seam.
The method of elimination titanium alloy electron beam weld nail tip defect the most according to claim 1, it is characterised in that described step
Rapid 2), in, in the velocity interval of 8～20mm/s, frequency is that proportional relation is from 200～400Hz with it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610771152.0A CN106271173A (en) | 2016-08-29 | 2016-08-29 | A kind of method eliminating titanium alloy electron beam weld nail tip defect |
Applications Claiming Priority (1)
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| CN201610771152.0A CN106271173A (en) | 2016-08-29 | 2016-08-29 | A kind of method eliminating titanium alloy electron beam weld nail tip defect |
Publications (1)
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| CN106271173A true CN106271173A (en) | 2017-01-04 |
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| CN201610771152.0A Pending CN106271173A (en) | 2016-08-29 | 2016-08-29 | A kind of method eliminating titanium alloy electron beam weld nail tip defect |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109664014A (en) * | 2018-12-17 | 2019-04-23 | 中国航发动力股份有限公司 | A kind of process reducing the deformation of shell part electron beam welding |
| CN109848538A (en) * | 2018-11-29 | 2019-06-07 | 沈阳富创精密设备有限公司 | Application of the vacuum electron beam welding in tantalum alloy welding |
| CN110385517A (en) * | 2019-08-22 | 2019-10-29 | 北京星航机电装备有限公司 | A kind of titanium alloy electro-beam welding method based on laser cleaning processing |
| CN110711967A (en) * | 2019-09-10 | 2020-01-21 | 中国船舶重工集团公司第七二五研究所 | Design method for eliminating defect of welding root of large-thickness titanium alloy electron beam |
| CN111375880A (en) * | 2020-03-31 | 2020-07-07 | 中国航发动力股份有限公司 | Electron beam welding method for rotor parts |
| CN112958899A (en) * | 2021-03-17 | 2021-06-15 | 中国航发动力股份有限公司 | Method for eliminating shrinkage cavity defect at root of electron beam welding seam |
| CN114633041A (en) * | 2022-04-19 | 2022-06-17 | 中国航发动力股份有限公司 | Welding joint of diffuser and inner casing of combustion chamber casing and machining method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109848538A (en) * | 2018-11-29 | 2019-06-07 | 沈阳富创精密设备有限公司 | Application of the vacuum electron beam welding in tantalum alloy welding |
| CN109664014A (en) * | 2018-12-17 | 2019-04-23 | 中国航发动力股份有限公司 | A kind of process reducing the deformation of shell part electron beam welding |
| CN110385517A (en) * | 2019-08-22 | 2019-10-29 | 北京星航机电装备有限公司 | A kind of titanium alloy electro-beam welding method based on laser cleaning processing |
| CN110711967A (en) * | 2019-09-10 | 2020-01-21 | 中国船舶重工集团公司第七二五研究所 | Design method for eliminating defect of welding root of large-thickness titanium alloy electron beam |
| CN110711967B (en) * | 2019-09-10 | 2021-06-18 | 中国船舶重工集团公司第七二五研究所 | Design method for eliminating electron beam welding root defects of large-thickness titanium alloy plate |
| CN111375880A (en) * | 2020-03-31 | 2020-07-07 | 中国航发动力股份有限公司 | Electron beam welding method for rotor parts |
| CN112958899A (en) * | 2021-03-17 | 2021-06-15 | 中国航发动力股份有限公司 | Method for eliminating shrinkage cavity defect at root of electron beam welding seam |
| CN114633041A (en) * | 2022-04-19 | 2022-06-17 | 中国航发动力股份有限公司 | Welding joint of diffuser and inner casing of combustion chamber casing and machining method |
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Application publication date: 20170104 |