CN104439675A - Method for controlling electron beam weld quenching brittle crack of hydraulic actuator cylinder - Google Patents
Method for controlling electron beam weld quenching brittle crack of hydraulic actuator cylinder Download PDFInfo
- Publication number
- CN104439675A CN104439675A CN201410587768.3A CN201410587768A CN104439675A CN 104439675 A CN104439675 A CN 104439675A CN 201410587768 A CN201410587768 A CN 201410587768A CN 104439675 A CN104439675 A CN 104439675A
- Authority
- CN
- China
- Prior art keywords
- hydraulic actuator
- weld
- electron beam
- welding
- actuator cylinder
- 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.)
- Granted
Links
Classifications
-
- 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
- B23K15/0026—Auxiliary equipment
-
- 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
Abstract
The invention provides a method for controlling the electron beam weld quenching brittle crack of a hydraulic actuator cylinder, and belongs to the technical field of aero-engine part manufacturing. The hydraulic actuator cylinder should be subjected to thermal treatment within eight hours after welding according to the postwelding design standard, however, thermal treatment can not be conducted due to the structural limit of the hydraulic actuator cylinder, accordingly, the probability that the quenching brittle crack happens to the weld of the hydraulic actuator cylinder can be increased, and the weld quality of the hydraulic actuator cylinder can not be guaranteed. Under the premise that the hydraulic actuator cylinder can not be subjected to thermal treatment, from the aspect of an electron beam welding technology, the electron welding technology parameter and the technology process are set again so that the temperature field change of a weld area can be controlled, and a low energy density electron beam scanning processing step to the weld is added at the same time. Afterwards, slow cooling treatment is also conducted on the weld, so that the effect similar to tempering heat treatment to the weld is achieved, the occurring of the weld quenching brittle crack is further effectively controlled, and the weld quality of the hydraulic actuator cylinder is effectively guaranteed.
Description
Technical field
The invention belongs to technical field of aircraft engine part manufacture, particularly relate to a kind of hydraulic control pressurized strut electron beam weld and to harden the method for brittle crack.
Background technology
Hydraulic actuator is as the important composition parts of aero-engine, effect is the opening and closing controlling engine tail nozzle, hydraulic actuator is made up of lining and bonnet, and both are sealed connected together by electron beam welding mode, and the quality of butt welded seam has high requirement.
The material of hydraulic actuator is martensitic stain less steel, and martensitic stain less steel has the strong feature of hardenability, hydraulic actuator is according to postwelding design standard, should heat-treat hydraulic actuator in 8 hours at postwelding, but be subject to the structure restriction of hydraulic actuator, cannot heat-treat.
Because hydraulic actuator does not carry out Overheating Treatment, this can cause hydraulic actuator weld seam occur the hardening probability of brittle crack to increase, in actual production process, just find that multiple hydraulic actuation barrel part has occurred hardening brittle crack in commissure, the weldquality of hydraulic actuator cannot be guaranteed.
Summary of the invention
For prior art Problems existing, the invention provides a kind of hydraulic control pressurized strut electron beam weld to harden the method for brittle crack, start with from electro-beam welding process, by resetting electro-beam welding process parameter and technological process, similar tempering heat treatment effect can be played in hydraulic actuator commissure, effectively control weld seam and to harden the appearance of brittle crack.
To achieve these goals, the present invention adopts following technical scheme: a kind of hydraulic control pressurized strut electron beam weld hardens the method for brittle crack, comprises the steps:
Step one: polishing is carried out on the surface along lining and bonnet weld seam interface both sides 20mm scope, until there is metallic luster, then by lining together with bonnet elastic conjunction, ensure that weld gap is not more than 0.06mm, the amount of grinding one's teeth is not more than 0.25mm;
Step 2: utilize positioning fixture that the hydraulic actuator after assembling is carried out Set and Positioning, ensures that the gap between hydraulic actuator and positioning fixture is not more than 0.1mm;
Step 3: sent in the vacuum chamber of vacuum electron beam welder together with positioning fixture by hydraulic actuator, the pressure in vacuum chamber is not more than 6.4 × 10
-4mbar;
Step 4: implement tack welding to the hydraulic actuator in vacuum chamber, tack welding parameter is: high pressure is 150KV, and focus current is 2735mA, and electronic beam current is 2 ~ 4mA, and speed of welding is 10mm/s, and waveform is triangular wave, and amplitude is 1.0mm, and frequency is 200 hertz;
Step 5: formal electron beam welding is carried out to hydraulic actuator, welding parameter of electron beam is: high pressure is 150KV, and focus current is 2735mA, and electronic beam current is 6mA, and speed of welding is 10mm/s, and waveform is triangular wave, and amplitude is 1.0mm, and frequency is 200 hertz;
Step 6: after formal electron beam welding completes 30 seconds, again the process of low energy densities electron beam scanning is carried out to hydraulic actuator weld seam, concrete welding parameter is: high pressure is 150KV, focus current is 2830mA, electronic beam current is 3.6mA, and speed of welding is 10mm/s, and waveform is triangular wave, amplitude is 1.2mm, and frequency is 200 hertz;
Step 7: after the process of low energy densities electron beam scanning completes, the vacuum state of continuation maintenance vacuum chamber 5 minutes, to reduce the cooling velocity of weld seam, the vacuum dwell time terminates, then inflates in vacuum chamber, and then take out hydraulic actuator, welding job completes.
The tack welding of hydraulic actuator position while welding adopts 4 uniform symmetry location.
Beneficial effect of the present invention:
Under the prerequisite that the present invention cannot heat-treat at hydraulic actuator, start with from electro-beam welding process, by resetting electro-beam welding process parameter and technological process, to control the change of temperature field of welded seam area, increase the low energy densities electron beam scanning treatment step of butt welded seam simultaneously, go back butt welded seam afterwards and carry out slow cooling process, thus make commissure serve the effect of similar tempering heat treatment, and then effectively control weld seam and to harden the appearance of brittle crack, hydraulic actuator weldquality is effectively ensured.
Accompanying drawing explanation
Fig. 1 is hydraulic actuator structural representation;
In figure, 1-lining, 2-bonnet, 3-weld seam.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Described a kind of hydraulic control pressurized strut electron beam weld hardens the method for brittle crack, comprises the steps:
Step one: polishing is carried out on the surface along lining and bonnet weld seam interface both sides 20mm scope, until there is metallic luster, then by lining together with bonnet elastic conjunction, ensure that weld gap is not more than 0.06mm, the amount of grinding one's teeth is not more than 0.25mm;
Step 2: utilize positioning fixture that the hydraulic actuator after assembling is carried out Set and Positioning, ensures that the gap between hydraulic actuator and positioning fixture is not more than 0.1mm;
Step 3: sent in the vacuum chamber of vacuum electron beam welder together with positioning fixture by hydraulic actuator, the pressure in vacuum chamber is not more than 6.4 × 10
-4mbar;
Step 4: implement tack welding to the hydraulic actuator in vacuum chamber, tack welding parameter is: high pressure is 150KV, and focus current is 2735mA, and electronic beam current is 2 ~ 4mA, and speed of welding is 10mm/s, and waveform is triangular wave, and amplitude is 1mm, and frequency is 200 hertz;
Step 5: formal electron beam welding is carried out to hydraulic actuator, welding parameter of electron beam is: high pressure is 150KV, and focus current is 2735mA, and electronic beam current is 6mA, and speed of welding is 10mm/s, and waveform is triangular wave, and amplitude is 1mm, and frequency is 200 hertz;
Step 6: after formal electron beam welding completes 30 seconds, again the process of low energy densities electron beam scanning is carried out to hydraulic actuator weld seam, concrete welding parameter is: high pressure is 150KV, focus current is 2830mA, electronic beam current is 3.6mA, and speed of welding is 10mm/s, and waveform is triangular wave, amplitude is 1.2mm, and frequency is 200 hertz;
Step 7: after the process of low energy densities electron beam scanning completes, the vacuum state of continuation maintenance vacuum chamber 5 minutes, to reduce the cooling velocity of weld seam, the vacuum dwell time terminates, then inflates in vacuum chamber, and then take out hydraulic actuator, welding job completes.
The tack welding of hydraulic actuator position while welding adopts 4 uniform symmetry location.
Scheme in embodiment is also not used to limit scope of patent protection of the present invention, and the equivalence that all the present invention of disengaging do is implemented or changed, and is all contained in the scope of the claims of this case.
Claims (2)
1. hydraulic control pressurized strut electron beam weld hardens a method for brittle crack, it is characterized in that: comprise the steps:
Step one: polishing is carried out on the surface along lining and bonnet weld seam interface both sides 20mm scope, until there is metallic luster, then by lining together with bonnet elastic conjunction, ensure that weld gap is not more than 0.06mm, the amount of grinding one's teeth is not more than 0.25mm;
Step 2: utilize positioning fixture that the hydraulic actuator after assembling is carried out Set and Positioning, ensures that the gap between hydraulic actuator and positioning fixture is not more than 0.1mm;
Step 3: sent in the vacuum chamber of vacuum electron beam welder together with positioning fixture by hydraulic actuator, the pressure in vacuum chamber is not more than 6.4 × 10
-4mbar;
Step 4: implement tack welding to the hydraulic actuator in vacuum chamber, tack welding parameter is: high pressure is 150KV, and focus current is 2735mA, and electronic beam current is 2 ~ 4mA, and speed of welding is 10mm/s, and waveform is triangular wave, and amplitude is 1.0mm, and frequency is 200 hertz;
Step 5: formal electron beam welding is carried out to hydraulic actuator, welding parameter of electron beam is: high pressure is 150KV, and focus current is 2735mA, and electronic beam current is 6mA, and speed of welding is 10mm/s, and waveform is triangular wave, and amplitude is 1.0mm, and frequency is 200 hertz;
Step 6: after formal electron beam welding completes 30 seconds, again the process of low energy densities electron beam scanning is carried out to hydraulic actuator weld seam, concrete welding parameter is: high pressure is 150KV, focus current is 2830mA, electronic beam current is 3.6mA, and speed of welding is 10mm/s, and waveform is triangular wave, amplitude is 1.2mm, and frequency is 200 hertz;
Step 7: after the process of low energy densities electron beam scanning completes, the vacuum state of continuation maintenance vacuum chamber 5 minutes, to reduce the cooling velocity of weld seam, the vacuum dwell time terminates, then inflates in vacuum chamber, and then take out hydraulic actuator, welding job completes.
2. a kind of hydraulic control pressurized strut electron beam weld according to claim 1 hardens the method for brittle crack, it is characterized in that: the tack welding of hydraulic actuator position while welding adopts 4 uniform symmetry location.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410587768.3A CN104439675B (en) | 2014-10-28 | 2014-10-28 | A kind of hydraulic actuator electron beam weld that controls hardens the method for brittle crack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410587768.3A CN104439675B (en) | 2014-10-28 | 2014-10-28 | A kind of hydraulic actuator electron beam weld that controls hardens the method for brittle crack |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104439675A true CN104439675A (en) | 2015-03-25 |
| CN104439675B CN104439675B (en) | 2016-07-06 |
Family
ID=52886847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410587768.3A Active CN104439675B (en) | 2014-10-28 | 2014-10-28 | A kind of hydraulic actuator electron beam weld that controls hardens the method for brittle crack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104439675B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109048026A (en) * | 2018-09-05 | 2018-12-21 | 中国航发动力股份有限公司 | A kind of electro-beam welding method of the double girth joints with one heart of cast aluminium alloy gold |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5294771A (en) * | 1991-12-17 | 1994-03-15 | Rolls-Royce Plc | Electron beam welding |
| JP2004330302A (en) * | 2003-04-30 | 2004-11-25 | General Electric Co <Ge> | Electronic beam welding method of performing heat treatment after welding |
| CN101073849A (en) * | 2007-06-18 | 2007-11-21 | 哈尔滨工业大学 | Composite method for controlling electronic-beam welding thermal circulation of TiAl intermetallic compound |
| CN103386546A (en) * | 2013-07-18 | 2013-11-13 | 首都航天机械公司 | Quality control method for hydraulic body part electron beam welding joint |
| CN104057198A (en) * | 2014-06-19 | 2014-09-24 | 哈尔滨东安发动机（集团）有限公司 | Vacuum electronic beam welding method for titanium-alloy rotor component |
-
2014
- 2014-10-28 CN CN201410587768.3A patent/CN104439675B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5294771A (en) * | 1991-12-17 | 1994-03-15 | Rolls-Royce Plc | Electron beam welding |
| JP2004330302A (en) * | 2003-04-30 | 2004-11-25 | General Electric Co <Ge> | Electronic beam welding method of performing heat treatment after welding |
| CN101073849A (en) * | 2007-06-18 | 2007-11-21 | 哈尔滨工业大学 | Composite method for controlling electronic-beam welding thermal circulation of TiAl intermetallic compound |
| CN103386546A (en) * | 2013-07-18 | 2013-11-13 | 首都航天机械公司 | Quality control method for hydraulic body part electron beam welding joint |
| CN104057198A (en) * | 2014-06-19 | 2014-09-24 | 哈尔滨东安发动机（集团）有限公司 | Vacuum electronic beam welding method for titanium-alloy rotor component |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109048026A (en) * | 2018-09-05 | 2018-12-21 | 中国航发动力股份有限公司 | A kind of electro-beam welding method of the double girth joints with one heart of cast aluminium alloy gold |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104439675B (en) | 2016-07-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20170050265A1 (en) | Laser Shock Peening Method for Obtaining Large-Area Uniform Surface Morphology | |
| CN102294541B (en) | Electron beam welding method for ultra supercritical partition plates | |
| CN103409758B (en) | Pump shells and blade microcrack laser reinforcing life-prolonging method | |
| AU2019101478A4 (en) | Stainless steel powder for ultra-high rate laser cladding | |
| CN104109860A (en) | Multi-laser polishing and reinforcing method for surfaces of additive manufacturing metal parts | |
| CN109079421B (en) | A kind of method that locomotive buffer bar surface reconditioning remanufactures | |
| CN104136737A (en) | Turbine rotor | |
| CN106392292A (en) | Electron beam welding method of thin-walled part | |
| CN104227220A (en) | Large-area laser impact spot welding method and device based on nano-particle reinforcement | |
| CN102319951B (en) | Electron beam welding method for large-thickness diaphragms of steam turbines | |
| CN105154876A (en) | Waste cast steel travelling wheel remanufacturing method | |
| CN105149763A (en) | High-voltage electron beam welding method for steam turbine spacer plate | |
| CN107119272B (en) | A kind of method that port machine walks to take turns laser melting coating stainless steel coating | |
| CN104439675B (en) | A kind of hydraulic actuator electron beam weld that controls hardens the method for brittle crack | |
| CN106624319B (en) | Electron beam welding method of gear assembly | |
| CN101890623B (en) | Method for welding piston by electron beam | |
| CN103962739A (en) | Method for welding grey cast iron cracks | |
| CN104233288B (en) | A kind of preparation method of TiCFeAl bases wear-resistant coating | |
| KR20180042538A (en) | IN-Situ inductive heat treatment apparatus of operating nuclear power plant piping | |
| CN110938740B (en) | Intermetallic compound laser shock peening life prolonging and deformation control method | |
| JP2010138474A (en) | Method for producing corrosion-resistant member | |
| CN102796859A (en) | Process for performing heat treatment on heavy thick plate welding structural member | |
| CN104439665A (en) | Ultrathin cold air flow guide pipe precise welding method | |
| JP2011179080A (en) | Method of manufacturing gear | |
| CN103343189B (en) | Method for combinatorially reinforcing thick plate through laser shock |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee after: Chinese Hangfa Shenyang Liming Aero engine limited liability company Address before: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee before: Liming Aeroplane Engine (Group) Co., Ltd., Shenyang City |
|
| CP01 | Change in the name or title of a patent holder |