CN106903390A - A kind of method of combined heat source heating soldering - Google Patents
A kind of method of combined heat source heating soldering Download PDFInfo
- Publication number
- CN106903390A CN106903390A CN201710303233.2A CN201710303233A CN106903390A CN 106903390 A CN106903390 A CN 106903390A CN 201710303233 A CN201710303233 A CN 201710303233A CN 106903390 A CN106903390 A CN 106903390A
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- China
- Prior art keywords
- heating
- soldering
- thermal source
- heat source
- combined heat
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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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/002—Soldering by means of induction heating
-
- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
-
- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/005—Soldering by means of radiant energy
-
- 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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/04—Heating appliances
- B23K3/047—Heating appliances electric
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention belongs to welding technology field, it is related to a kind of method of combined heat source heating soldering.Basic thermal source is respectively adopted and soldering thermal source treats welder's part and carries out entirety or local preheating and local heating soldering.Mass-type foundation heating-up temperature of the invention exceeds well over traditional preheating temperature, and overall preheating temperature can reach 1100 DEG C, basic thermal source heating through before soldering, in soldering and after soldering all the time.The present invention is possessing combined heat source, and with being completed in the special equipment for improving protective atmosphere.According to the workpiece material to be welded preheating temperature different with the different set of structure (500~1100 DEG C) and corresponding local heating brazing process parameter, the problem of Cracking for avoiding conventional local heating soldering cooling procedure solder joint from easily occurring, while avoiding component from being integrally warmed up to the influences such as performance loss, the structural intergrity destruction that brazing temperature higher causes integrated member to bring.
Description
Technical field
The invention belongs to welding technology field, it is related to a kind of combined heat source heating soldering method.The present invention is that possessing group
Thermal source is closed, and with completion in the special equipment for improving protective atmosphere.Difference according to workpiece material to be welded and structure sets
Fixed different preheating temperature (500~1100 DEG C) and corresponding local heating brazing process parameter, it is to avoid conventional local heating pricker
The problem of Cracking that weldering cooling procedure solder joint easily occurs, while avoiding component from being integrally warmed up to brazing temperature higher causes entirety
The influences such as performance loss, structural intergrity destruction that component brings.Therefore, the method is particularly suitable for fabricated part or sub-assembly
Local route repair soldering, can also be applied to the local heating soldering of extraordinary hardly possible wlding material and special construction.
Background technology
With the continuous improvement required aero-engine performance, substantial amounts of monocrystalline, directionally solidified superalloy, DS superalloy contour
Energy material has been used for the manufacture of turbo blade, and its use environment is also more harsh.After it is on active service a life cycle, can produce
The defects such as crackle, ablation and abrasion and cause blade failure, wherein failure mode is based on crackle, but corresponding recovery technique is simultaneously
It is synchronous not with the equipment of engine to carry out.At present, novel high-performance engine turbine blade production process becomes increasingly complex,
Generally need by complicated processings such as soldering assembling, punching, heat treatment, coatings.Wherein soldering assembling procedure is general compared with low temperature
The lower soldering of degree, the technology subsequently repaired using higher temperature entirety heating soldering is not allowed, and reduces brazing temperature joint performance
Requirement can not be met.
Soldering is the effective means of aero-turbine guide vane crack forming mechanism, but using the vacuum pricker of overall heating
Soldering method, must remove blade coatings and cryogenic assembly before weldering, and soldering reparing process is complicated, and overall heating soldering thermal cycle
Easily monocrystalline, directionally solidified superalloy, DS superalloy blade mother metal performance are adversely affected, it is impossible to which satisfaction reparation afterloading unit is used will
Ask.
The works such as former brazed assembly, whole removing removing coating are removed before can reducing weldering using the restorative procedure of local heating soldering
Sequence, as long as postwelding carries out local coatings reconstruction and restorability heat treatment, can significantly improve remediation efficiency, reduce and repair
Cost.And local heating soldering reparation can keep prophyll piece monocrystalline or oriented freezing organization stability and overall performance, keep away
Tissue and penalty caused by blade is integrally heated are exempted from, so as to ensure to repair the stability and reliability of rear blade.It is another
Aspect, it is only local after China's active service some three generations's opportunity of combat engine turbine guide vanes military service to crack, if realizing local
The reparation of crackle, then can be greatly improved remediation efficiency, shorten the repair welding cycle, significantly save expenses of military expenditure.
But the current conventional local heating soldering tech high-temperature alloy blades crack forming mechanism poor for solderability is still
There is insoluble problem, local heat input higher causes brazed seam to there is larger thermograde with periphery mother metal, so that
Very big thermal stress is produced, the cast superalloy poor for plasticity is susceptible to postwelding cracking, it is impossible to realize failure leaf
The crack forming mechanism of piece；Though traditional pre-heating technique can relief of thermal stress to a certain extent generation, relatively low preheating temperature (
As at 500 DEG C once) and be only capable of being preheated before weldering, the generation of still inevitable postwelding crackle.
The content of the invention
The purpose of the present invention is：The present invention is for aero-engine structural member crack forming mechanism and extraordinary hardly possible wlding material and structure
Soldering problem, propose a kind of combined heat source heating soldering method.Purpose be solve engine structure especially directional solidification,
Single crystal super alloy blade cracks recovery technique problem, it is to avoid integral braze-welded heating is to blade mother metal overall structure and the shadow of performance
Ring；Solve conventional local heating soldering postwelding problem of Cracking.The present invention can be additionally used in other extraordinary hardly possible wlding material and special construction
Local heating soldering.
The technical scheme is that：A kind of method of combined heat source heating soldering, including basic thermal source and soldering thermal source
Combined heat source；Basic heat source uses resistance radiant heating or sensing heating, and soldering thermal source uses electric arc heated, plasma
Arc heating, the heating of vacuum hollow cathode electric arc heated, electron beam or laser beam heats；
Treating welder's part by basic thermal source carries out the preheating of entirety or part；Treating welder's part by soldering thermal source carries out soldering
Heating or local heating；(according to the workpiece material to be welded preheating temperature different with the different set of structure, such as 500~
1100 DEG C) comprise the following steps that：
1) by solder assembling at the position to be welded of workpiece to be welded, under vacuum, inert atmosphere or protection of reducing atmosphere environment,
Treating welder's part by basic thermal source carries out the preheating of entirety or part, and preheating temperature is controlled below brazing filler metal melts temperature, and in advance
The difference of hot temperature and brazing filler metal melts temperature keeps preheating temperature at 20 DEG C~100 DEG C, excellent when solder is low-temperature brazing filler metal
Elect 20 DEG C as, when solder is high-temp solder, preferably 50 DEG C；
2) keep the heating of basic thermal source constant, and the position to be welded for treating welder's part by soldering thermal source simultaneously is heated, and is made
Obtain brazing filler metal melts and fill position to be welded, position to be welded stops the heating of soldering thermal source after completing filling so that inserts is cooled to
The preheating temperature of basic thermal source heating, and solidify；
3) basic thermal source stops heating, and workpiece to be welded is cooled to environment temperature.
Preferably, basic heat source uses resistance radiant heating or sensing heating, and soldering thermal source uses the hollow the moon of vacuum
Pole electrical arc is heated or electron beam heating.
Preferably, solder is powdery, bulk, paste, banding.Further, solder is foil.Further, solder is
Adhesive tape.
Described basic thermal source and soldering thermal source are in vacuum environment, and vacuum pressure is less than 2 × 10-2Pa。
Described basic thermal source and soldering thermal source are in protective atmosphere, and protection gas is inert gas or reducing gas.
Preferably, workpiece to be welded is engine turbine blade.
It is an advantage of the invention that：
Basic thermal source heating-up temperature of the invention exceeds well over traditional preheating temperature, and overall heating-up temperature can reach 1100 DEG C
(traditional preheating temperature is general below 500 DEG C), preheating temperature higher reduces local heating brazed portions and one-piece machine member
Thermograde, reduce thermal stress, effectively prevent the generation of brazed seam cracking in brazing process；Protective atmosphere is improved possessing
Brazing process is completed in special equipment, tradition preheating soldering is solved and be there are problems that oxidation, cannot realize；Tradition preheating
The preheating heating of soldering is general to be completed before main heat source heating, and present invention basis thermal source heat through before soldering, in soldering
With all the time, the maintenance less thermograde of brazed portions reduces stress cracking tendency, reduces postwelding residual stress after soldering；
According to different materials and structure, local heating thermal source may be selected electric arc, plasma arc, vacuum hollow cathode electric arc, electron beam, swash
The different heating thermal source such as light beam is alternative high；Using combined heat source local heating method for welding, compared to pricker in overall heating furnace
Weldering can significantly improve production efficiency, reduces cost, and can reduce entirety heating soldering thermal cycle to Workpiece structure integrality with
The influence of material property.
Specific embodiment
Embodiment one
Workpiece to be welded is GH3044 high temperature alloy pieces, appropriate bulk solder is placed on high temperature alloy piece, and use energy storage
Spot welding is fixed, and subsequent high temperature alloy piece is fixed on the workbench with sensing heating basis thermal source.
High temperature alloy piece local environment is vacuum state, and vacuum pressure is 5 × 10-3Below Pa.
Carry out sensing heating to high temperature alloy piece to be preheated to 1000 DEG C and be incubated so that workbench is in swing state, pendulum
Dynamic speed is 20~50mm/s.
Electric arc medium gas is filled with high temperature alloy piece local environment, vacuum pressure is 2 × 10-1Below Pa, in environment, gas
Body flow is in 5~20ml/min.
The soldering thermal source of vacuum hollow cathode electric arc heated is opened, to block solder heat, is swung and is caused the hollow the moon of vacuum
Pole electrical arc is uniformly heated to position to be welded entirety mowing type, brazing filler metal melts and after sprawling, and first stops the heating of soldering thermal source, Ran Houzai
Stop basic thermal source heating.
Present implementation, watches after cooling, test piece by solder wetting, solder position flawless, test piece is without obvious oxidation tint.
Embodiment two
Test specimen to be welded is certain the aero-engine nickel base superalloy turborotor cracked after being on active service, to blade
Crack site carries out mechanical chipping to remove crack surfaces oxide-film.Basic thermal source uses resistance radiant heating in the present embodiment,
Soldering thermal source is heated using electron beam.
Solder uses paste nickel-base alloy powder, and solder is placed in one end of crackle.The blade that solder will have been assembled is placed in very
In Altitude, vacuum pressure is not higher than 5 × 10-3Pa。
Resistance radiant heating is carried out to blade to preheat and be incubated to 1050 DEG C, afterwards by soldering thermal source to blade position to be welded
Electron beam is carried out with solder defocus scanning heating, beam voltage 55kV, line 3mA, focus current 2A.Treat that solder is completed
Stop electron beam heating after fusing joint filling, stop resistance heating, natural cooling.
Watched after cooling, blade cracks position is good by solder filling, brazed portions surface-brightening, flawless.
Claims (7)
1. a kind of method of combined heat source heating soldering, it is characterised in that：Combined heat source including basic thermal source and soldering thermal source；
Basic heat source uses resistance radiant heating or sensing heating, and soldering thermal source uses electric arc heated, Arc Plasma Heating, vacuum
Hollow cathode arc heating, electron beam heating or laser beam heats；
Treating welder's part by basic thermal source carries out the preheating of entirety or part；Welder's part is treated by soldering thermal source carry out soldering and add
Heat；Comprise the following steps that：
Step 1) solder is assembled at the position to be welded of workpiece to be welded, under vacuum, inert atmosphere or protection of reducing atmosphere environment,
Treating welder's part by basic thermal source carries out the preheating of entirety or part, and preheating temperature is controlled below brazing filler metal melts temperature, and in advance
The difference of hot temperature and brazing filler metal melts temperature keeps preheating temperature at 20 DEG C~100 DEG C, excellent when solder is low-temperature brazing filler metal
Elect 20 DEG C as, when solder is high-temp solder, preferably 50 DEG C；
Step 2) keep the heating of basic thermal source constant, and the position to be welded for treating welder's part by soldering thermal source simultaneously is heated, and is made
Obtain brazing filler metal melts and fill position to be welded, position to be welded stops the heating of soldering thermal source after completing filling so that inserts is cooled to
The preheating temperature of basic thermal source heating, and solidify；
Step 3) basic thermal source stops heating, and workpiece to be welded is cooled to environment temperature.
2. the method for a kind of combined heat source heating soldering according to claim 1, it is characterised in that：Basic heat source is adopted
With resistance radiant heating or sensing heating, soldering thermal source is using vacuum hollow cathode electric arc heated or electron beam heating.
3. the method for a kind of combined heat source heating soldering according to claim 1, it is characterised in that：Solder is powdery, block
Shape, paste, banding.
4. the method for a kind of combined heat source heating soldering according to claim 1, it is characterised in that：Solder is adhesive tape or paper tinsel
Band.
5. the method for a kind of combined heat source heating soldering according to claim 1, it is characterised in that：Described basic thermal source
It is in vacuum environment with soldering thermal source, and vacuum pressure is less than 2 × 10-2Pa。
6. the method for a kind of combined heat source heating soldering according to claim 1, it is characterised in that：Described basic thermal source
It is in protective atmosphere with soldering thermal source, and protection gas is inert gas or reducing gas.
7. the method for a kind of combined heat source heating soldering according to claim 1, it is characterised in that：Workpiece to be welded is to start
Machine turbo blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710303233.2A CN106903390A (en) | 2017-05-03 | 2017-05-03 | A kind of method of combined heat source heating soldering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710303233.2A CN106903390A (en) | 2017-05-03 | 2017-05-03 | A kind of method of combined heat source heating soldering |
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| Publication Number | Publication Date |
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| CN106903390A true CN106903390A (en) | 2017-06-30 |
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ID=59210966
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710303233.2A Pending CN106903390A (en) | 2017-05-03 | 2017-05-03 | A kind of method of combined heat source heating soldering |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112014932A (en) * | 2020-08-25 | 2020-12-01 | 哈尔滨工业大学（深圳） | Low-temperature packaging method for photoelectric device and optical fiber |
| CN112317907A (en) * | 2020-10-27 | 2021-02-05 | 西门子爱克斯射线真空技术(无锡)有限公司 | Brazing device and method for anode target disc |
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| CN205764324U (en) * | 2016-05-27 | 2016-12-07 | 华侨大学 | A kind of sense preheating laser braze welding and prepare the device of abrasive particle grinding wheel |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112014932A (en) * | 2020-08-25 | 2020-12-01 | 哈尔滨工业大学（深圳） | Low-temperature packaging method for photoelectric device and optical fiber |
| CN112014932B (en) * | 2020-08-25 | 2022-04-15 | 哈尔滨工业大学（深圳） | Low-temperature packaging method for photoelectric device and optical fiber |
| CN112317907A (en) * | 2020-10-27 | 2021-02-05 | 西门子爱克斯射线真空技术(无锡)有限公司 | Brazing device and method for anode target disc |
| US11701727B2 (en) | 2020-10-27 | 2023-07-18 | Siemens Healthcare Gmbh | Brazing apparatus and method for anode target plate |
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Application publication date: 20170630 |