CN101890549B - Method of using vacuum electron beam to braze turbine blades and end closure of engine - Google Patents
Method of using vacuum electron beam to braze turbine blades and end closure of engine Download PDFInfo
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- CN101890549B CN101890549B CN2010102543220A CN201010254322A CN101890549B CN 101890549 B CN101890549 B CN 101890549B CN 2010102543220 A CN2010102543220 A CN 2010102543220A CN 201010254322 A CN201010254322 A CN 201010254322A CN 101890549 B CN101890549 B CN 101890549B
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Abstract
The invention relates to a method of using vacuum electron beam to braze the turbine blades and end closure of an engine used for welding the blades and end closure of the turbine engine. The method comprises the following steps: adopting the high pressure liquid sandblast treatment technology to perform pre-welding treatment to a brazing area, uniformly coating solder at the solder joints; adjusting the work distance and focusing coil current of an electron gun to scan in a circular scanning manner; and heating the brazing area. The invention adopts the high pressure liquid sandblast treatment method to clean the area to be brazed of the turbine blades, thus effectively removing scale and foreign matter such as oil stains on the surface of the end closure; and high-energy-density electron beam is adopted to heat the part of the welded workpiece, thus effectively protecting the performance of the material of the non-brazing area, minimizing the influence of the heating process on the turbine blades and facilitating to increase the service life of the turbine blades; the time for completing one brazing process under heating is only more than ten minutes, thus multiplying the processing efficiency; and the energy utilization rate is extremely high.
Description
Technical field
The present invention relates to be used for a kind of method that adopts vacuum electron beam to braze turbine blades and end closure of engine of turbine engine blade end cap welding.
Background technology
At present, the welding of turbine blades and end closure of engine all adopts the method for vacuum brazing to connect, because the particularity of vacuum brazing welding procedure at first need be carried out mechanical chipping to solder side before welding, then, the vacuum chamber of packing into heats, welds.Because the locus at turbine blades and end closure place is very narrow, the cleaning tool accessibility is poor, and the oxide skin of end caps is often thicker, and mechanical chipping is difficult to realize effective removing, does not reach welding requirements; And, in the heating soldering process, be that the non brazing of turbo blade zone is heated with brazing area integral body, the non brazing zone has experienced pyroprocess too, makes the performance of material descend to some extent, causes the decline in service life of blade.And heating process is long, capacity usage ratio is low.
Summary of the invention
The purpose of this invention is to provide a kind of effective cleaning turbine blades and end closure surface, do not destroy a kind of method that adopts vacuum electron beam to braze turbine blades and end closure of engine of turbo blade non brazing region material performance.Technical solution of the present invention is; Utilize beam energy density high, be easy to characteristics such as control; Adopt electron beam scanning control system; Sweep signal based on specific waveforms scans implementing design through the electron beam of dispersing, and heat point source is converted into plane heat source, thereby under vacuum environment, realizes the local heat of material is realized electron beam to braze.Its welding step is:
1. with the high pressure liquid sandblast treatment technology brazing area is carried out pre-welding treatment, hydraulic pressure 6MPa selects 200～250 purpose silicon carbide powders for use, carry out surface treatment after, end cap is installed on blade apical pore place;
2. use the acetone organic solvent,, and evenly be applied near the solder joint joint, insert vacuum greater than 10 with powdered filler metal furnishing pasty state
-2In the vacuum workshop of Pa;
3. regulating work distance of electron gun is 600～700mm, applies the 60kV high pressure to electron gun, and the electron gun focusing coil current is 800～1050mA, opens electron-beam scanning system, and scan mode is 1000Hz for circular, scan frequency; Being 30～50 pairs with number of scan points is scanned by the welding zone territory and brazing area is heated;
4. utilize infrared radiation thermometer that heating region is carried out temperature detection; Speed with 30～40mA/min increases line; Regional temperature to be heated stops to increase line when room temperature rises to 1135 ℃～1160 ℃ with the speed of 135～165 ℃/min; Be incubated 3～5 minutes, the speed with 10～20mA/min reduces line to 0mA afterwards.
The method that the present invention adopts high pressure liquid sandblast to handle is cleared up the region surface to be welded of turbo blade, the foreign matters such as greasy dirt of scale removal, and end cover surface place effectively; Adopt the electron beam of high-energy-density that welded part is carried out local heat, effectively protected the performance of non brazing region material, heating process is reduced to the influence of moving turbine blade minimum, thereby help improving the working life of turbo blade; Adopt the electron beam of high-energy-density that brazing area is heated, make temperature reach the solder fusion temperature rapidly, accomplishing a soldering heating process only needs tens minutes even a few minutes, make working (machining) efficiency improve several times, and capacity usage ratio is very high.The present invention adopts the electron gun scanning system to implement electron beam scanning, realizes the uniformity of heating region temperature.
The specific embodiment
After adopting the SS-2 liquid sandblasting machine that the moving turbine blade end cap is treated that the pricker zone adopts high pressure liquid sandblast to handle, end cap is installed on blade apical pore place; The cream solder that is in harmonious proportion evenly is applied near the solder joint joint, inserts in the vacuum workshop; Use the special tooling anchor clamps, with the high heat capacity environment such as creating around the blade; Utilize vacuum system to obtain 10
-2The above vacuum of Pa; Work distance of electron gun is adjusted to 600～700mm, applies high pressure 60kV, filament is heated for the electron gun filament galvanization, regulate the electron gun focusing coil current in 800～1050mA scope to electron gun; Open electron-beam scanning system, electron beam is in disperses duty, set the electron beam scanning parameter, number of scan points is 30～50, and scan type is set at circle, and scan frequency is set at 1000Hz; Divergent bundle; Begin Fast Heating is carried out in blade zone to be brazed, utilize infrared radiation thermometer that heating region is carried out temperature detection, with the speed increase line of 30～40mA/min; Regional temperature to be heated stops to increase line when room temperature rises to 1135 ℃～1160 ℃ with the speed of 135～165 ℃/min; Come into effect insulation in 3～5 minutes and handle, the speed with 10～20mA/min reduces line afterwards, is cooled to room temperature.Accomplish the whole electron beam to braze process of moving turbine blade end cap.
Embodiment one
Welding FWP14 engine turbine working-blade end cap.
1. with the high pressure liquid sandblast treatment technology brazing area is carried out pre-welding treatment, hydraulic pressure 6MPa selects 200～250 purpose silicon carbide powders for use, carry out surface treatment after, end cap is installed on blade apical pore place;
2. use acetone and other organic solvent,, and evenly be applied near the solder joint joint, insert vacuum greater than 10 with powdered filler metal furnishing pasty state
-2In the vacuum workshop of Pa;
3. regulating work distance of electron gun is 600～700mm, applies the 60kV high pressure to electron gun, and the electron gun focusing coil current is 800～1050mA, opens electron-beam scanning system, and scan mode is 1000Hz for circular, scan frequency; With number of scan points is 30, to being scanned by the welding zone territory and brazing area being heated;
4. utilize infrared radiation thermometer that heating region is carried out temperature detection; Speed with 30～40mA/min increases line; Regional temperature to be heated stops to increase line when room temperature rises to 1160 ℃ with the speed of 140～160 ℃/min; Be incubated 3～5 minutes, the speed with 10～20mA/min reduces line to 0mA afterwards.
Embodiment two
Welding XXXX engine turbine working-blade end cap.
(1) with the high pressure liquid sandblast treatment technology brazing area is carried out pre-welding treatment, hydraulic pressure 6MPa selects 200～250 purpose silicon carbide powders for use, carry out surface treatment after, end cap is installed on blade apical pore place;
(2) use acetone and other organic solvent,, and evenly be applied near the solder joint joint, insert vacuum greater than 10 with powdered filler metal furnishing pasty state
-2In the vacuum workshop of Pa;
(3) regulating work distance of electron gun is 600～700mm, applies the 60kV high pressure to electron gun, and the electron gun focusing coil current is 800～1050mA, opens electron-beam scanning system, and scan mode is 1000Hz for circular, scan frequency; With number of scan points is 50, to being scanned by the welding zone territory and brazing area being heated;
(4) utilize infrared radiation thermometer that heating region is carried out temperature detection; Speed with 30～40mA/min increases line; Regional temperature to be heated stops to increase line when room temperature rises to 1135 ℃ with the speed of 135～150 ℃/min; Be incubated 3～5 minutes, the speed with 10～20mA/min reduces line to 0mA afterwards.
Claims (1)
1. method that adopts vacuum electron beam to braze turbine blades and end closure of engine is characterized in that:
(1) with the high pressure liquid sandblast treatment technology brazing area is carried out pre-welding treatment, hydraulic pressure 6MPa selects 200～250 purpose silicon carbide powders for use, carry out surface treatment after, end cap is installed on blade apical pore place;
(2) use the acetone organic solvent,, and evenly be applied near the solder joint joint, insert vacuum greater than 10 with powdered filler metal furnishing pasty state
-2In the vacuum workshop of Pa;
(3) regulating work distance of electron gun is 600～700mm, applies the 60kV high pressure to electron gun, and the electron gun focusing coil current is 800～1050mA, opens electron-beam scanning system, and scan mode is 1000Hz for circular, scan frequency; Being 30～50 pairs with number of scan points is scanned by the welding zone territory and brazing area is heated;
(4) utilize infrared radiation thermometer that heating region is carried out temperature detection; Speed with 30～40mA/min increases line; Regional temperature to be heated stops to increase line when room temperature rises to 1135 ℃～1160 ℃ with the speed of 135～165 ℃/min; Be incubated 3～5 minutes, the speed with 10～20mA/min reduces line to 0mA afterwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102543220A CN101890549B (en) | 2010-08-17 | 2010-08-17 | Method of using vacuum electron beam to braze turbine blades and end closure of engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102543220A CN101890549B (en) | 2010-08-17 | 2010-08-17 | Method of using vacuum electron beam to braze turbine blades and end closure of engine |
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| CN101890549A CN101890549A (en) | 2010-11-24 |
| CN101890549B true CN101890549B (en) | 2012-06-20 |
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| CN2010102543220A Active CN101890549B (en) | 2010-08-17 | 2010-08-17 | Method of using vacuum electron beam to braze turbine blades and end closure of engine |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102476235B (en) * | 2010-11-30 | 2014-01-01 | 成都泛华航空仪表电器有限公司 | Method for welding fusion-molded superimposed aluminium foils |
| US9573228B2 (en) * | 2011-11-03 | 2017-02-21 | Siemens Energy, Inc. | Ni—Ti—CR near ternary eutectic alloy for gas turbine component repair |
| CN103056627B (en) * | 2012-12-29 | 2015-07-08 | 中国人民解放军总参谋部第六十研究所 | Forming method of high-precision closed blisk |
| CN105014171B (en) * | 2014-04-29 | 2017-02-22 | 核工业西南物理研究院 | Quick connection method for tungsten/copper in electron beam braze welding manner |
| CN107999981B (en) * | 2017-11-30 | 2021-06-22 | 中国航发沈阳黎明航空发动机有限责任公司 | Welding process method of split-structure high-pressure turbine guide blade |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1439870A1 (en) * | 1986-12-23 | 1993-12-15 | Dvigatelej Nii Tekh Org Proizv | Method of electron-beam welding of rotor structures |
| DE102005029616B3 (en) * | 2005-06-23 | 2006-11-16 | Jrw Technology + Engineering Gmbh | Vacuum electron beam welding installation, e.g. for fabricating turbine rotor, uses two gripping devices for alternately transporting blanks into lock chamber and removing finished workpieces |
| CN101007366A (en) * | 2007-01-26 | 2007-08-01 | 哈尔滨工业大学 | Repair method of high temperature alloy vane by electron beam welding |
| CN101092882A (en) * | 2007-07-12 | 2007-12-26 | 刘天成 | Electron bombardment welding turbine shaft, and producing technique |
-
2010
- 2010-08-17 CN CN2010102543220A patent/CN101890549B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1439870A1 (en) * | 1986-12-23 | 1993-12-15 | Dvigatelej Nii Tekh Org Proizv | Method of electron-beam welding of rotor structures |
| DE102005029616B3 (en) * | 2005-06-23 | 2006-11-16 | Jrw Technology + Engineering Gmbh | Vacuum electron beam welding installation, e.g. for fabricating turbine rotor, uses two gripping devices for alternately transporting blanks into lock chamber and removing finished workpieces |
| CN101007366A (en) * | 2007-01-26 | 2007-08-01 | 哈尔滨工业大学 | Repair method of high temperature alloy vane by electron beam welding |
| CN101092882A (en) * | 2007-07-12 | 2007-12-26 | 刘天成 | Electron bombardment welding turbine shaft, and producing technique |
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