CN107999950A - A kind of middle pressure high-velocity electron beam welding method of titanium alloy thin wall casing - Google Patents
A kind of middle pressure high-velocity electron beam welding method of titanium alloy thin wall casing Download PDFInfo
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- CN107999950A CN107999950A CN201711272526.5A CN201711272526A CN107999950A CN 107999950 A CN107999950 A CN 107999950A CN 201711272526 A CN201711272526 A CN 201711272526A CN 107999950 A CN107999950 A CN 107999950A
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- 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
- B23K15/00—Electron-beam welding or cutting
- B23K15/06—Electron-beam welding or cutting within a vacuum chamber
-
- 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
- B23K15/0006—Electron-beam welding or cutting specially adapted for particular articles
-
- 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
- B23K15/0033—Preliminary treatment
-
- 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)
- Welding Or Cutting Using Electron Beams (AREA)
Abstract
A kind of middle pressure high-velocity electron beam welding method of titanium alloy thin wall casing, step are as follows：Welding pre-treatment is carried out to part to be welded, ensures cleannes, and ensures that fit-up gap and dislocation are less than 0.05mm；Titanium alloy thin wall casing is assembled on welding fixture and is vacuumized；After carrying out tack welding to weld seam, electron beam welding is carried out, completes the welding of weld seam, welding parameter is：Accelerating potential 110KV, 30~22mm/s of speed of welding；13~18mA of welding current, electron beam scanning parameter are：Sweep waveform is to justify ripple, 1.2~0.8mm of amplitude, frequency 100Hz；48~90J/mm of heat input ratio；After the completion of welding, weldquality is checked, the test mode includes visual, X-ray and fluoroscopy.Welding method using the present invention forms appearance of weld stability and quality significantly improves, and thermal weld stress reduces by 20~30%, and welding deformation is effectively controlled, weld seam frontal width, and back side width disclosure satisfy that design requirement with root reinforcement.
Description
Technical field：
The invention belongs to hardware welding technology field, and in particular to a kind of middle pressure of titanium alloy thin wall casing is electric at a high speed
Beamlet welding method.
Background technology：
Welding deformation, Varying-thickness appearance of weld stability and the reverse side of titanium alloy thin wall casing fly in aero-engine manufacture
Splash thing control to fail thoroughly to solve all the time, from the point of view of the characteristics of thin walled welds casing manufactures, influence factor is more, reason is multiple
It is miscellaneous.Main influence factor has：Dimensional accuracy and assembling quality, welding procedure reasonability, material weldability before part welding
Influenced with subsequent technique (heat treatment) and integrated artistic Vehicle routing etc..Welding deformation is to influence thin wall component quality and life
One of principal element of efficiency is produced, the presence of welding deformation not only influences the manufacturing process of product, it is often more important that also influence production
The performance of product.The basic factor for producing part welding deformation is that non-uniform heating and cooling procedure cause in welding process
Temperature stress and material structure transformation (phase transformation) caused by structural stress, and postwelding residual stress can also finally process part
The fatigue strength of precision and dimensional stability, the generation of weld defect and part produces very big adverse effect, therefore realizes
Weld industry is the main technological difficulties of Thin-Wall Outer Casing class part welding, and splash can influence the surface quality of part
With the workload of rear process.Solution has：Improve component assembly quality before welding, Optimal Parameters improve shaping, reduce welding
Thermal deformation, control weld defect reduce repair welding number etc. caused by heat input.
The content of the invention：
The purpose of the present invention is overcome above-mentioned the shortcomings of the prior art, there is provided a kind of middle pressure of titanium alloy thin wall casing
High-velocity electron beam welding method, by Optimized Matching electron beam weld parameter, improve speed of welding, improve welding process stability and
Forming quality, reduces input energy level, reduces unstable heating, cooling procedure to the adverse effect of material, improves part weldering
Connect problem on deformation.
To achieve the above object, the present invention uses following technical scheme：
A kind of middle pressure high-velocity electron beam welding method of titanium alloy thin wall casing, comprises the following steps：
Step 1, pre-welding treatment：
Welding pre-treatment is carried out to part to be welded, ensures piece surface to be welded without greasy dirt, dust and external attachment, and protect
Card fit-up gap and dislocation are less than 0.05mm；
Step 2, component assembly：
Titanium alloy thin wall casing is assembled on welding fixture, and is vacuumized；
Step 3, electron beam welding：
(1) positioning of beam welds：Tack welding is carried out to weld seam using symmetrical tack welding；
(2) electron beam welding is carried out, completes the welding of weld seam, wherein, welding parameter is：Accelerating potential is 110KV, welding
Speed is 30~22mm/s；Welding current is 13~18mA, and electron beam scanning parameter is：Sweep waveform is to justify ripple, amplitude 1.2
~0.8mm, frequency 100Hz；Heat input ratio is 48~90J/mm；
Step 4, postwelding inspection：
After the completion of welding, weldquality is checked, the test mode includes visual, X-ray and fluoroscopy.
Using the welding method, the heat input of welding reduces by 20~30%.
In the step 3 (1), before positioning of beam weldering, welding parameter has been carried out according to corresponding welding parameter
Verification, visually inspects weld seam, and positioning of beam weldering is carried out after meeting weldquality requirement.
In the step 3 (1), the weld seam is welds with different thickness.
In the step 3 (1), the throat depth is 2.0~5.0mm.
In the step 3 (2), welding process is：
When being soldered to the weld seam uniform thickness stage, constant speed of welding is 30mm/s or 22mm/s, and constant welding current is 13mA
Or 18mA, constant scan amplitude is 1.2mm or 1.8mm, and heat input Ratio invariableness is 48J/mm or 90J/mm；
When being soldered to throat depth changes phase：
During throat depth increase, it is 22mm/s that speed of welding is constant, and it is 1.8mm that scan amplitude is constant, heat input
Ratio invariableness is 90J/mm, and constant welding current is 18mA；
During throat depth reduction, it is 30mm/s that speed of welding is constant, and it is 1.2mm that scan amplitude is constant, heat input
Ratio invariableness is 48J/mm, and constant welding current is 13mA.
In the step 3 (2), throat depth increase with reduce welding process in, speed of welding, scan amplitude,
Heat input ratio and welding current when throat depth increases with reducing when transient change to corresponding steady state value.
Beneficial effects of the present invention：
(1) welding parameter of electron beam is more, it is interrelated closely, particularly to thin-wall titanium alloy material, except needing to meet
Weld appearance forming requirements, will also control weld seam internal metallurgical quality, and the middle pressure of titanium alloy thin wall casing of the invention is electric at a high speed
Beamlet welding method carries out contrast orthogonal test by welding parameters to electron beam, filters out relatively low accelerating potential, high weldering
Connect the welding parameter of speed, circular scan waveform, moderate scan frequency and amplitude, the weld seam frontal width of formation, back side width
Design requirement is disclosure satisfy that with root reinforcement；
(2) present invention mainly starts with from electron beam Welding, is used first completely newly on aero-engine stator casing
Welding condition, joins by adjusting accelerating potential, welding current, speed of welding, electron beam scanning pattern, frequency and amplitude etc.
Number, realizes that high speed and precision not weld by equal thickness, makes speed of welding be enhanced about more than once；
(3) the middle pressure high-velocity electron beam welding method of titanium alloy thin wall casing using the present invention so that weld seam is particularly
The shape stability and quality of thin and thick changeover portion significantly improve, and reverse side reinforcement substantially reduces, and reverse side splash significantly reduces, welding
Heat input reduces by 20~30%, and welding deformation is effectively controlled, and makes the circularity of stator casing, straightness, radial contraction amount, leaf
Ten significant dimensions precision such as piece angular position, blade height difference are respectively increased 10~80%, and a solder yield is from 50%
Bring up to current more than 95%.
Brief description of the drawings：
Fig. 1 is electron beam weld metallograph, wherein：
(a) it is the weld seam metallograph of prior art mesohigh low speed welding；
(b) it is that the weld seam metallograph that high-speed welding is formed is pressed in the embodiment of the present invention 1；
Fig. 2 is the titanium alloy thin wall casing schematic diagram of the embodiment of the present invention 1；
Fig. 3 is the weld joint schematic diagram that the embodiment of the present invention 1 is formed；
Fig. 4 is the weld seam material object schematic diagram that the embodiment of the present invention 1 is formed.
Embodiment：
With reference to embodiment, the present invention is described in further detail.
Embodiment 1
A kind of middle pressure high-velocity electron beam welding method of titanium alloy thin wall casing, comprises the following steps：
Step 1, pre-welding treatment：
Welding pre-treatment is carried out to part to be welded, ensures piece surface to be welded without greasy dirt, dust and external attachment, and protect
Card fit-up gap and dislocation are less than 0.05mm；
Step 2, component assembly：
Titanium alloy thin wall casing is assembled on welding fixture, and is vacuumized, titanium alloy thin wall casing schematic diagram is such as
Shown in Fig. 2；
Step 3, electron beam welding：
(1) positioning of beam welds：Welding parameter verification has been carried out according to corresponding welding parameter, has visually inspected weld seam, it is full
Tack welding is carried out to more than 100 bar weld seams on part using symmetrical tack welding after sufficient weldquality requirement, the throat depth is
2.0~5.0mm；
(2) electron beam welding is carried out, completes the welding of weld seam, wherein, welding parameter is：Accelerating potential is 110KV, is focused on
Electric current is 1880mA, and speed of welding is 30~22mm/s；Welding current is 13~18mA, and electron beam scanning parameter is：Scan ripple
Shape is circle ripple, and amplitude is 1.2~0.8mm, frequency 100Hz；Heat input ratio is 48~90J/mm, part welding parameter such as table
Shown in 1；
It is 2.0mm when being soldered to throat depth, constant speed of welding is 30mm/s, and constant welding current is 13mA, scanning
Constant amplitude is 1.2mm, and heat input Ratio invariableness is 48J/mm；
It is 5.0mm when being soldered to throat depth, constant speed of welding is 22mm/s, and constant welding current is 18mA, scanning
Constant amplitude is 1.8mm, and heat input Ratio invariableness is 90J/mm；
During throat depth increases from 2.0mm to 5.0mm, constant speed of welding is 22mm/s, and scan amplitude is constant
For 1.8mm, heat input Ratio invariableness is 90J/mm, and constant welding current is 18mA, wherein speed of welding, scan amplitude, line energy
Measure ratio and welding current when throat depth increases transient change to corresponding steady state value；
During throat depth reduces from 5.0mm to 2.0mm, constant speed of welding is 30mm/s, and scan amplitude is constant
For 1.2mm, heat input Ratio invariableness is 48J/mm, and constant welding current is 13mA, wherein speed of welding, scan amplitude, line energy
Measure ratio and welding current when throat depth reduces transient change to corresponding steady state value；
Step 4, postwelding inspection：
After the completion of welding, using visual, the mode of X-ray and fluoroscopy, weldquality, the weld seam metallograph are checked
As shown in Fig. 1 (b), weld joint schematic diagram as shown in figure 3, weld seam material object schematic diagram as shown in figure 4, weld seam frontal width exists
2.2mm~2.4mm, back side width meet design requirement, weldquality reaches in 1.3mm~1.5mm, root reinforcement 0.1mm
II class weld seam standard, the welding energy input to the present embodiment method calculate, and the calculation formula of welding energy input isBy calculating, the heat input for making welding using the welding method reduces 20~30%, is reflected in postwelding zero
10~80% are improved in part items dimensional accuracy, positive effect；The high pressure low speed generally used in the prior art welds to be formed
Weld seam metallograph such as Fig. 1 (a) shown in, since speed is relatively low, the liquid state molten pool survival time length, under the effect of gravity, weld seam goes out
Existing fusion area sinks, the increased phenomenon of reverse side reinforcement.
High-velocity electron beam welding parameter is pressed in table 1
Claims (4)
1. the middle pressure high-velocity electron beam welding method of a kind of titanium alloy thin wall casing, it is characterised in that comprise the following steps：
Step 1, pre-welding treatment：
Welding pre-treatment is carried out to part to be welded, ensures piece surface to be welded without greasy dirt, dust and external attachment, and ensure to fill
It is less than 0.05mm with gap and dislocation；
Step 2, component assembly：
Titanium alloy thin wall casing is assembled on welding fixture, and is vacuumized；
Step 3, electron beam welding：
(1) positioning of beam welds：Tack welding is carried out to weld seam using symmetrical tack welding；
(2) electron beam welding is carried out, completes the welding of weld seam, wherein, welding parameter is：Accelerating potential is 110KV, speed of welding
For 30~22mm/s；Welding current is 13~18mA, and electron beam scanning parameter is：Sweep waveform is circle ripple, amplitude for 1.2~
0.8mm, frequency 100Hz；Heat input ratio is 48~90J/mm；
Step 4, postwelding inspection：
After the completion of welding, weldquality is checked, the test mode includes visual, X-ray and fluoroscopy.
2. the middle pressure high-velocity electron beam welding method of titanium alloy thin wall casing according to claim 1, it is characterised in that institute
In the step 3 (1) stated, before positioning of beam weldering, welding parameter verification is carried out according to corresponding welding parameter, visually inspection
Weld seam is looked into, positioning of beam weldering is carried out after meeting weldquality requirement.
3. the middle pressure high-velocity electron beam welding method of titanium alloy thin wall casing according to claim 1, it is characterised in that institute
In the step 3 (1) stated, the weld seam is welds with different thickness.
4. the middle pressure high-velocity electron beam welding method of titanium alloy thin wall casing according to claim 3, it is characterised in that institute
In the step 3 (2) stated, welding process is：
When being soldered to the weld seam uniform thickness stage, it is 30mm/s or 22mm/s that speed of welding is constant, welding current it is constant for 13mA or
18mA, constant scan amplitude is 1.2mm or 1.8mm, and heat input Ratio invariableness is 48J/mm or 90J/mm；
When being soldered to throat depth changes phase：
During throat depth increase, it is 22mm/s that speed of welding is constant, and it is 1.8mm that scan amplitude is constant, heat input ratio
Constant is 90J/mm, and constant welding current is 18mA；
During throat depth reduction, it is 30mm/s that speed of welding is constant, and it is 1.2mm that scan amplitude is constant, heat input ratio
Constant is 48J/mm, and constant welding current is 13mA.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108581167A (en) * | 2018-06-27 | 2018-09-28 | 西安飞机工业（集团）有限责任公司 | A kind of asymmetric fusion penetration double-side electronic beam soldering method of big thickness titanium alloy sheet |
| 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 |
| CN110238612A (en) * | 2019-06-03 | 2019-09-17 | 中国兵器科学研究院宁波分院 | A kind of welding titanium alloy profile and preparation method thereof |
| CN110732795A (en) * | 2019-11-19 | 2020-01-31 | 中国航发贵州黎阳航空动力有限公司 | aircraft engine exhaust casing welding method |
| CN110977170A (en) * | 2019-11-25 | 2020-04-10 | 中国航发沈阳黎明航空发动机有限责任公司 | Electron beam welding method for thin-wall casing gas-collecting hood structure |
| 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 |
| CN112077440A (en) * | 2020-07-31 | 2020-12-15 | 北京航星机器制造有限公司 | Welding method of thin-wall titanium alloy spherical component |
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| CN107160025A (en) * | 2017-05-15 | 2017-09-15 | 中国船舶重工集团公司第七二五研究所 | A kind of thin-wall barrel high energy beam precision welding manufacture method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108581167A (en) * | 2018-06-27 | 2018-09-28 | 西安飞机工业（集团）有限责任公司 | A kind of asymmetric fusion penetration double-side electronic beam soldering method of big thickness titanium alloy sheet |
| 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 |
| CN110238612A (en) * | 2019-06-03 | 2019-09-17 | 中国兵器科学研究院宁波分院 | A kind of welding titanium alloy profile and preparation method thereof |
| CN110732795A (en) * | 2019-11-19 | 2020-01-31 | 中国航发贵州黎阳航空动力有限公司 | aircraft engine exhaust casing welding method |
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| CN110977170A (en) * | 2019-11-25 | 2020-04-10 | 中国航发沈阳黎明航空发动机有限责任公司 | Electron beam welding method for thin-wall casing gas-collecting hood structure |
| CN110977170B (en) * | 2019-11-25 | 2021-05-18 | 中国航发沈阳黎明航空发动机有限责任公司 | Electron beam welding method for thin-wall casing gas-collecting hood structure |
| 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 |
| CN112077440A (en) * | 2020-07-31 | 2020-12-15 | 北京航星机器制造有限公司 | Welding method of thin-wall titanium alloy spherical component |
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