CN104475909A - Flame tube head assembly brazing method - Google Patents
Flame tube head assembly brazing method Download PDFInfo
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- CN104475909A CN104475909A CN201410591614.1A CN201410591614A CN104475909A CN 104475909 A CN104475909 A CN 104475909A CN 201410591614 A CN201410591614 A CN 201410591614A CN 104475909 A CN104475909 A CN 104475909A
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- China
- Prior art keywords
- solder
- head assembly
- sleeve
- swirler
- inner liner
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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
- B23K1/008—Soldering within a furnace
-
- 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
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
-
- 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
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
- B23K1/206—Cleaning
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/42—Continuous combustion chambers using liquid or gaseous fuel characterised by the arrangement or form of the flame tubes or combustion chambers
Abstract
The invention discloses a flame tube head assembly brazing method and belongs to the technical field of aero-engine part manufacturing. In a brazing method of a traditional flame tube head assembly, an assembly substrate at a positioning welding point is oxidized due to the fact that a tube front section and a splash pan are positioned through argon arc welding, so that during brazing, brazing filter metal cannot moisten the substrate at the positioning welding point, the brazing seam is not continuous, and a design requirement of a continuous brazing seam cannot be achieved, and after brazing, a cold air hole is blocked by the brazing filter metal, the brazed rate between a sleeve and a swirler cannot achieve a design requirement of more than 80%. The flame tube head assembly brazing method has the advantages that the assembly substrate at the positioning welding point is avoided from being oxidized due to positioning through energy storage spot welding, enabling the paste brazing filter metal to moisten the substrate at the positioning welding point and guaranteeing the continuous brazing seam design requirement; enabling a to-be-welded position on the internal side of the sleeve to satisfy the brazed rate requirement and avoiding the brazing filter metal blocking the cold air hole during the brazing process due to the fact that check soldering flux pains inside the cold air hole; the operability is strong and production costs are obviously reduced.
Description
Technical field
The invention belongs to technical field of aircraft engine part manufacture, particularly relate to a kind of method for welding of burner inner liner head assembly.
Background technology
Burner inner liner head assembly is as the important composition parts of aero-engine, its operating temperature is about 1000 DEG C, burner inner liner head assembly is made up of swirler, cylindrical shell leading portion, splash pan and sleeve, four are high-temperature alloy material, cylindrical shell leading portion, splash pan and sleeve divide three layers to be sleeved on successively on swirler, cylindrical shell leading portion, splash pan and soldering must be adopted between sleeve with swirler to be connected.
Traditional method for welding of burner inner liner head assembly is:
1. before soldering, first adopt argon arc welding cylindrical shell leading portion and swirler are positioned by design size, and inside cylindrical shell leading portion the preset appropriate paste solder (B-Ni82CrSiB) in place to be welded;
2. swirler end face is kept down, then splash pan is assembled on the design size position of swirler, inside splash pan, place to be welded utilizes argon arc welding to be positioned on swirler by splash pan again, last at place to be welded circumferentially preset appropriate paste solder (B-Ni82CrSiB), this solder is that splash pan is shared when soldering with sleeve;
3. sleeve is assembled on swirler, ensures that sleeve docks well with the boss of swirler;
4. keep swirler end face down, burner inner liner head assembly is sent in drying box and dries, then carry out soldering by the burner inner liner head assembly feeding vacuum drying oven after oven dry.
But adopt the method for welding of above-mentioned burner inner liner head assembly, there is the defect that cannot evade: because cylindrical shell leading portion and splash pan all adopt argon arc welding to position, the assembly matrix which results in tack weld place is oxidized, during soldering, solder cannot soak the matrix at tack weld place, thus cause brazed seam discontinuous, the designing requirement of continuous brazed seam cannot be reached; Because the cold air hole distance brazed seam of φ 0.5mm on cylindrical shell leading portion is comparatively near, after soldering, cold air hole can be blocked by solder; When after sleeve assembling, inside sleeve, place to be welded is blocked, therefore solder cannot be added, during soldering, inside sleeve, place to be welded can only rely on and to share with splash pan and the solder of being partial to splash pan welds, and this ratio of brazing area that directly results between sleeve and swirler does not reach the designing requirement of more than 80%.
Summary of the invention
For prior art Problems existing, the invention provides a kind of method for welding of burner inner liner head assembly, solve the assembly matrix problem of oxidation at tack weld place, effectively avoid cold air hole to be blocked by solder, the ratio of brazing area designing requirement between sleeve and swirler can be met.
To achieve these goals, the present invention adopts following technical scheme: a kind of method for welding of burner inner liner head assembly, comprises the steps:
Step one: pre-welding treatment, utilizes acetone soln to clean swirler, cylindrical shell leading portion, splash pan and sleeve, ensures that swirler, cylindrical shell leading portion, splash pan and sleeve surface are without grease and other impurity;
Step 2: the solder preparing two types, comprises paste solder and sticky brazing filler material;
Step 3: assembling and positioning is carried out to cylindrical shell leading portion, first cylindrical shell leading portion and swirler are assembled according to design size, fit clearance during assembling is not more than 0.1mm, then percussion spot welding is utilized to be fixed on swirler by cylindrical shell leading portion, percussion spot welding solder joint is positioned at the straight mouth place of cylindrical shell leading portion and along the circumferential direction goes up, and solder joint is along the circumferential direction uniform;
After cylindrical shell leading portion completes percussion spot welding location, the end face of swirler is placed down, first dry, send into again in vacuum drying oven and carry out soldering, until soldering complete after taking-up, then utilize applicator paste solder to be along the circumferential direction applied to place to be welded inside cylindrical shell leading portion, paste solder consumption is determined by gap to be welded;
Step 4: splash pan is assembled according to design size, fit clearance during assembling is not more than 0.1mm, then utilizes percussion spot welding to be fixed on swirler by splash pan, and percussion spot welding solder joint is positioned at place to be welded inside splash pan, and solder joint is along the circumferential direction uniform;
After splash pan completes percussion spot welding location, utilize applicator paste solder to be along the circumferential direction applied to place to be welded inside splash pan, paste solder consumption is determined by gap to be welded;
Step 5: before carrying out sleeve assembling, first measure the rigging position diameter of sleeve and swirler, and calculate both fit clearances, maximum fit clearance is not more than 0.1mm; Then sticky brazing filler material is along the circumferential direction pasted onto on the joint to be welded of sleeve, sticky brazing filler material location for paste is apart from the size distance of sleeve end surface to be welded, equal the degree of depth that sleeve joint to be welded inserts swirler, finally clear up the redundant brazing filler metal at the end to end place of sticky brazing filler material, now sleeve and swirler are assembled, ensure that sleeve end surface to be welded contacts with the boss in swirler hole, now burner inner liner head assembly has assembled;
Step 6: dip only solder flux with banister brush, and be coated in the cold air hole of cylindrical shell leading portion uniformly by stopping solder flux;
Step 7: sent in drying box by the burner inner liner head assembly completing assembling and dry, bake out temperature is 140 ± 10 DEG C, and temperature retention time is 1.5 ~ 2 hours;
Step 8: the burner inner liner head assembly of having dried is sent in vacuum drying oven and carries out soldering, brazing temperature is 1180 ± 10 DEG C, temperature retention time is 5 ~ 10 minutes, after the temperature retention time of burner inner liner head assembly terminates, be cooled to less than 100 DEG C can come out of the stove, burner inner liner head assembly intensification, insulation and with in stove cooling procedure, the Vacuum Pressure in vacuum drying oven is all not more than 0.1Pa;
Step 9: the burner inner liner head assembly after soldering being completed is placed in clear water, soak after 10 ~ 15 minutes, the only solder flux before cylindrical shell in section surface and cold air hole is cleaned out again with hairbrush, finally dry up burner inner liner head assembly with compressed air, now the brazing operation of burner inner liner head assembly all completes.
Described paste solder is self-control solder, paste solder is formed by Powdered BNi-5 solder and binding agent hybrid modulation, and wherein, the percentage by weight of Powdered BNi-5 solder is 90% ~ 92%, the percentage by weight of binding agent is 8% ~ 10%, and paste solder is filling in applicator.
Described sticky brazing filler material is BNi-5 finished product sticky brazing filler material, and sticky brazing filler material thickness is 0.5mm, and sticky brazing filler material length is equal for being cropped to place to be welded with sleeve circumferential length, and sticky brazing filler material width is needed solder total amount to determine by sleeve joint to be welded.
Described only solder flux is titanium dioxide emulsion, and titanium dioxide emulsion adds 500 ~ 600 by 1L water
gtitania powder mixes.
Beneficial effect of the present invention:
The present invention is compared with the method for welding of traditional burner inner liner head assembly, and adopt percussion spot welding to position, the assembly matrix avoiding tack weld place is oxidized, and the matrix at the wettable tack weld place of paste solder, ensure that the designing requirement of continuous brazed seam; Inside sleeve, place to be welded meets ratio of brazing area requirement by sticky brazing filler material, and brushing only solder flux in cold air hole, avoid solder blocking cold air hole in brazing process.The present invention also have workable, assembly soldering qualification rate is high and the feature of remarkable reduction production cost.
Accompanying drawing explanation
Fig. 1 is a kind of burner inner liner headset structure schematic diagram;
Fig. 2 is I portion enlarged drawing in Fig. 1;
Fig. 3 is the tube-in-tube structure schematic diagram having pasted sticky brazing filler material;
In figure, 1-swirler, 2-cylindrical shell leading portion, 3-splash pan, 4-sleeve, 5-cold air hole, 6-sticky brazing filler material, 7-paste solder, 8-swirler end face.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Embodiment one
The swirler of burner inner liner head assembly, cylindrical shell leading portion and sleeve are the nickel base superalloy of GH3536, splash pan is the nickel base superalloy of GH5188, cylindrical shell leading portion, splash pan, the axis at sleeve and swirler place to be welded overlaps fitted position and is respectively 3.0mm, 3.5mm, 4.0mm, cylindrical shell leading portion, splash pan, the theoretical diameter size that sleeve is positioned at swirler place to be welded is respectively φ 45mm, φ 30mm, φ 22mm, technique test specimen is all had in the burner inner liner head assembly of every soldering batch, and together carry out soldering processing with the burner inner liner head assembly as part, and technique test specimen is used for last quality inspection use.
The vacuum drying oven model used in brazing process is VBFV-160, and equipment operating temperature is 550 ~ 1300 DEG C, and temperature homogeneity is ± 5 DEG C, and its end vacuum pressure is 0.001Pa.
The method for welding of described above-mentioned burner inner liner head assembly, comprises the steps:
Step one: pre-welding treatment, utilizes acetone soln to clean swirler, cylindrical shell leading portion, splash pan and sleeve, ensures that swirler, cylindrical shell leading portion, splash pan and sleeve surface are without grease and other impurity;
Step 2: the solder preparing two types, comprises paste solder and sticky brazing filler material;
Described paste solder is self-control solder, and paste solder is formed by Powdered BNi-5 solder and binding agent hybrid modulation, and wherein, the percentage by weight of Powdered BNi-5 solder is 90%, and the percentage by weight of binding agent is 10%, and paste solder is filling in applicator;
Described sticky brazing filler material is BNi-5 finished product sticky brazing filler material, and sticky brazing filler material thickness is 0.5mm, and sticky brazing filler material length is 70mm, and sticky brazing filler material width is 3.6mm;
Step 3: assembling and positioning is carried out to cylindrical shell leading portion, first cylindrical shell leading portion and swirler are assembled according to design size, fit clearance during assembling is not more than 0.1mm, then percussion spot welding is utilized to be fixed on swirler by cylindrical shell leading portion, percussion spot welding solder joint is positioned at the straight mouth place of cylindrical shell leading portion and along the circumferential direction goes up, number of welds is 12, and along the circumferential direction uniform, and percussion spot welding voltage is 180V ~ 220V;
After cylindrical shell leading portion completes percussion spot welding location, the end face of swirler is placed down, first dry, send into again in vacuum drying oven and carry out soldering, until soldering complete after taking-up, then utilize applicator paste solder to be along the circumferential direction applied to place to be welded inside cylindrical shell leading portion, paste solder diameter is about φ 1.2mm;
Step 4: splash pan is assembled according to design size, fit clearance during assembling is not more than 0.1mm, then percussion spot welding is utilized to be fixed on swirler by splash pan, percussion spot welding solder joint is positioned at place to be welded inside splash pan, number of welds is 8, and along the circumferential direction uniform, percussion spot welding voltage is 180V ~ 220V;
After splash pan completes percussion spot welding location, utilize applicator paste solder to be along the circumferential direction applied to place to be welded inside splash pan, paste solder diameter is about φ 1.6mm;
Step 5: before carrying out sleeve assembling, first measure the rigging position diameter of sleeve and swirler, and calculate both fit clearances, maximum fit clearance is not more than 0.1mm; Then sticky brazing filler material is along the circumferential direction pasted onto on the joint to be welded of sleeve, sticky brazing filler material location for paste is 4.5mm apart from the size distance of sleeve end surface to be welded, namely sleeve joint to be welded inserts the degree of depth of swirler is 4.5mm, finally clear up the redundant brazing filler metal at the end to end place of sticky brazing filler material, now sleeve and swirler are assembled, ensure that sleeve end surface to be welded contacts with the boss in swirler hole, now burner inner liner head assembly has assembled;
Step 6: dip only solder flux with banister brush, and be coated in the cold air hole of φ 0.5mm on cylindrical shell leading portion uniformly by stopping solder flux; Wherein, only solder flux is titanium dioxide emulsion, and titanium dioxide emulsion mixes by adding 500 ~ 600g titania powder in 1L water;
Step 7: sent in drying box by the burner inner liner head assembly completing assembling and dry, bake out temperature is 150 DEG C, and temperature retention time is 2 hours;
Step 8: the burner inner liner head assembly of having dried is sent in vacuum drying oven and carries out soldering, brazing temperature is 1170 DEG C, temperature retention time is 10 minutes, after the temperature retention time of burner inner liner head assembly terminates, be cooled to less than 100 DEG C can come out of the stove, burner inner liner head assembly intensification, insulation and with in stove cooling procedure, the Vacuum Pressure in vacuum drying oven is all not more than 0.1Pa;
Step 9: the burner inner liner head assembly after soldering being completed is placed in clear water, soak after 10 minutes, the only solder flux before cylindrical shell in section surface and φ 0.5mm cold air hole is cleaned out again with hairbrush, finally dry up burner inner liner head assembly with compressed air, now the brazing operation of burner inner liner head assembly all completes.
By the technique test specimen censorship of same soldering batch, carry out axial and radial cutting metallographic examination to technique test specimen, censorship is qualified can dispatch from the factory afterwards with a batch burner inner liner head assembly.
Embodiment two
The swirler of burner inner liner head assembly, cylindrical shell leading portion and sleeve are the nickel base superalloy of GH3536, splash pan is the nickel base superalloy of GH5188, cylindrical shell leading portion, splash pan, the axis at sleeve and swirler place to be welded overlaps fitted position and is respectively 3.5mm, 4.5mm, 6mm, cylindrical shell leading portion, splash pan, the theoretical diameter size that sleeve is positioned at swirler place to be welded is respectively φ 50mm, φ 35mm, φ 25mm, technique test specimen is all had in the burner inner liner head assembly of every soldering batch, and together carry out soldering processing with the burner inner liner head assembly as part, and technique test specimen is used for last quality inspection use.
The vacuum drying oven model used in brazing process is VBFV-160, and equipment operating temperature is 550 ~ 1300 DEG C, and temperature homogeneity is ± 5 DEG C, and its end vacuum pressure is 0.001Pa.
The method for welding of described above-mentioned burner inner liner head assembly, comprises the steps:
Step one: pre-welding treatment, utilizes acetone soln to clean swirler, cylindrical shell leading portion, splash pan and sleeve, ensures that swirler, cylindrical shell leading portion, splash pan and sleeve surface are without grease and other impurity;
Step 2: the solder preparing two types, comprises paste solder and sticky brazing filler material;
Described paste solder is self-control solder, and paste solder is formed by Powdered BNi-5 solder and binding agent hybrid modulation, and wherein, the percentage by weight of Powdered BNi-5 solder is 92%, and the percentage by weight of binding agent is 8%, and paste solder is filling in applicator;
Described sticky brazing filler material is BNi-5 finished product sticky brazing filler material, and sticky brazing filler material thickness is 0.5mm, and sticky brazing filler material length is 80mm, and sticky brazing filler material width is 4.8mm;
Step 3: assembling and positioning is carried out to cylindrical shell leading portion, first cylindrical shell leading portion and swirler are assembled according to design size, fit clearance during assembling is not more than 0.1mm, then percussion spot welding is utilized to be fixed on swirler by cylindrical shell leading portion, percussion spot welding solder joint is positioned at the straight mouth place of cylindrical shell leading portion and along the circumferential direction goes up, number of welds is 12, and along the circumferential direction uniform, and percussion spot welding voltage is 180V ~ 220V;
After cylindrical shell leading portion completes percussion spot welding location, the end face of swirler is placed down, first dry, send into again in vacuum drying oven and carry out soldering, until soldering complete after taking-up, then utilize applicator paste solder to be along the circumferential direction applied to place to be welded inside cylindrical shell leading portion, paste solder diameter is about φ 2mm;
Step 4: splash pan is assembled according to design size, fit clearance during assembling is not more than 0.1mm, then percussion spot welding is utilized to be fixed on swirler by splash pan, percussion spot welding solder joint is positioned at place to be welded inside splash pan, number of welds is 8, and along the circumferential direction uniform, percussion spot welding voltage is 180V ~ 220V;
After splash pan completes percussion spot welding location, utilize applicator paste solder to be along the circumferential direction applied to place to be welded inside splash pan, paste solder diameter is about φ 1.6mm;
Step 5: before carrying out sleeve assembling, first measure the rigging position diameter of sleeve and swirler, and calculate both fit clearances, maximum fit clearance is not more than 0.1mm; Then sticky brazing filler material is along the circumferential direction pasted onto on the joint to be welded of sleeve, sticky brazing filler material location for paste is 6mm apart from the size distance of sleeve end surface to be welded, namely sleeve joint to be welded inserts the degree of depth of swirler is 4.5mm, finally clear up the redundant brazing filler metal at the end to end place of sticky brazing filler material, now sleeve and swirler are assembled, ensure that sleeve end surface to be welded contacts with the boss in swirler hole, now burner inner liner head assembly has assembled;
Step 6: dip only solder flux with banister brush, and be coated in the cold air hole of φ 0.5mm on cylindrical shell leading portion uniformly by stopping solder flux; Wherein, only solder flux is titanium dioxide emulsion, and titanium dioxide emulsion mixes by adding 500 ~ 600g titania powder in 1L water;
Step 7: sent in drying box by the burner inner liner head assembly completing assembling and dry, bake out temperature is 150 DEG C, and temperature retention time is 2 hours;
Step 8: the burner inner liner head assembly of having dried is sent in vacuum drying oven and carries out soldering, brazing temperature is 1190 DEG C, temperature retention time is 5 minutes, after the temperature retention time of burner inner liner head assembly terminates, be cooled to less than 100 DEG C can come out of the stove, burner inner liner head assembly intensification, insulation and with in stove cooling procedure, the Vacuum Pressure in vacuum drying oven is all not more than 0.1Pa;
Step 9: the burner inner liner head assembly after soldering being completed is placed in clear water, soak after 15 minutes, the only solder flux before cylindrical shell in section surface and φ 0.5mm cold air hole is cleaned out again with hairbrush, finally dry up burner inner liner head assembly with compressed air, now the brazing operation of burner inner liner head assembly all completes.
By the technique test specimen censorship of same soldering batch, carry out axial and radial cutting metallographic examination to technique test specimen, censorship is qualified can dispatch from the factory afterwards with a batch burner inner liner head assembly.
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 (4)
1. a method for welding for burner inner liner head assembly, is characterized in that: comprise the steps:
Step one: pre-welding treatment, utilizes acetone soln to clean swirler, cylindrical shell leading portion, splash pan and sleeve, ensures that swirler, cylindrical shell leading portion, splash pan and sleeve surface are without grease and other impurity;
Step 2: the solder preparing two types, comprises paste solder and sticky brazing filler material;
Step 3: assembling and positioning is carried out to cylindrical shell leading portion, first cylindrical shell leading portion and swirler are assembled according to design size, fit clearance during assembling is not more than 0.1mm, then percussion spot welding is utilized to be fixed on swirler by cylindrical shell leading portion, percussion spot welding solder joint is positioned at the straight mouth place of cylindrical shell leading portion and along the circumferential direction goes up, and solder joint is along the circumferential direction uniform;
After cylindrical shell leading portion completes percussion spot welding location, the end face of swirler is placed down, first dry, send into again in vacuum drying oven and carry out soldering, until soldering complete after taking-up, then utilize applicator paste solder to be along the circumferential direction applied to place to be welded inside cylindrical shell leading portion, paste solder consumption is determined by gap to be welded;
Step 4: splash pan is assembled according to design size, fit clearance during assembling is not more than 0.1mm, then utilizes percussion spot welding to be fixed on swirler by splash pan, and percussion spot welding solder joint is positioned at place to be welded inside splash pan, and solder joint is along the circumferential direction uniform;
After splash pan completes percussion spot welding location, utilize applicator paste solder to be along the circumferential direction applied to place to be welded inside splash pan, paste solder consumption is determined by gap to be welded;
Step 5: before carrying out sleeve assembling, first measure the rigging position diameter of sleeve and swirler, and calculate both fit clearances, maximum fit clearance is not more than 0.1mm; Then sticky brazing filler material is along the circumferential direction pasted onto on the joint to be welded of sleeve, sticky brazing filler material location for paste is apart from the size distance of sleeve end surface to be welded, equal the degree of depth that sleeve joint to be welded inserts swirler, finally clear up the redundant brazing filler metal at the end to end place of sticky brazing filler material, now sleeve and swirler are assembled, ensure that sleeve end surface to be welded contacts with the boss in swirler hole, now burner inner liner head assembly has assembled;
Step 6: dip only solder flux with banister brush, and be coated in the cold air hole of cylindrical shell leading portion uniformly by stopping solder flux;
Step 7: sent in drying box by the burner inner liner head assembly completing assembling and dry, bake out temperature is 140 ± 10 DEG C, and temperature retention time is 1.5 ~ 2 hours;
Step 8: the burner inner liner head assembly of having dried is sent in vacuum drying oven and carries out soldering, brazing temperature is 1180 ± 10 DEG C, temperature retention time is 5 ~ 10 minutes, after the temperature retention time of burner inner liner head assembly terminates, be cooled to less than 100 DEG C can come out of the stove, burner inner liner head assembly intensification, insulation and with in stove cooling procedure, the Vacuum Pressure in vacuum drying oven is all not more than 0.1Pa;
Step 9: the burner inner liner head assembly after soldering being completed is placed in clear water, soak after 10 ~ 15 minutes, the only solder flux before cylindrical shell in section surface and cold air hole is cleaned out again with hairbrush, finally dry up burner inner liner head assembly with compressed air, now the brazing operation of burner inner liner head assembly all completes.
2. the method for welding of a kind of burner inner liner head assembly according to claim 1, it is characterized in that: described paste solder is self-control solder, paste solder is formed by Powdered BNi-5 solder and binding agent hybrid modulation, wherein, the percentage by weight of Powdered BNi-5 solder is 90% ~ 92%, the percentage by weight of binding agent is 8% ~ 10%, and paste solder is filling in applicator.
3. the method for welding of a kind of burner inner liner head assembly according to claim 1, it is characterized in that: described sticky brazing filler material is BNi-5 finished product sticky brazing filler material, sticky brazing filler material thickness is 0.5mm, sticky brazing filler material length is equal for being cropped to place to be welded with sleeve circumferential length, and sticky brazing filler material width is needed solder total amount to determine by sleeve joint to be welded.
4. the method for welding of a kind of burner inner liner head assembly according to claim 1, is characterized in that: described only solder flux is titanium dioxide emulsion, and titanium dioxide emulsion mixes by adding 500 ~ 600g titania powder in 1L water.
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| CN201410591614.1A CN104475909B (en) | 2014-10-28 | 2014-10-28 | A kind of method for welding of burner inner liner head assembly |
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| CN201410591614.1A CN104475909B (en) | 2014-10-28 | 2014-10-28 | A kind of method for welding of burner inner liner head assembly |
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| CN105108265A (en) * | 2015-07-24 | 2015-12-02 | 北京动力机械研究所 | Method for preventing narrow gap in vacuum brazing from blocking |
| CN105171172A (en) * | 2015-09-14 | 2015-12-23 | 沈阳飞机工业（集团）有限公司 | Brazing filler metal presetting method for guide pipe brazing connection piece |
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| CN107234354A (en) * | 2017-08-03 | 2017-10-10 | 中国电子科技集团公司第三十八研究所 | A kind of vacuum brazing method applied to thin-wall construction |
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| CN110014247A (en) * | 2018-11-16 | 2019-07-16 | 昆明贵金属研究所 | A kind of ABS type sticky brazing filler material and preparation method thereof |
| CN109365947A (en) * | 2018-12-06 | 2019-02-22 | 中国航发贵州黎阳航空动力有限公司 | The vacuum brazing clamp and method of flame tube head component |
| CN110238617A (en) * | 2019-06-24 | 2019-09-17 | 中国航发动力股份有限公司 | A method of improving the annular flame tube head group section component accuracy of manufacture |
| CN112108740A (en) * | 2020-09-21 | 2020-12-22 | 中国航发贵州黎阳航空动力有限公司 | Vacuum brazing method and clamp for dense gas film hole metal plate assembly |
| CN112108740B (en) * | 2020-09-21 | 2022-01-21 | 中国航发贵州黎阳航空动力有限公司 | Vacuum brazing method and clamp for dense gas film hole metal plate assembly |
| CN114833412A (en) * | 2021-02-02 | 2022-08-02 | 中国航发商用航空发动机有限责任公司 | Brazing method of DD6 single crystal and GH3536 alloy |
| CN113211004A (en) * | 2021-03-31 | 2021-08-06 | 西安航天发动机有限公司 | Method for eliminating brazing blockage of annular workpiece with tube seat stainless steel interlayer structure |
| CN113290297A (en) * | 2021-05-27 | 2021-08-24 | 贵州永红航空机械有限责任公司 | Brazing filler metal assembling method for brazing high-temperature alloy honeycomb silencer |
| CN113414461A (en) * | 2021-08-23 | 2021-09-21 | 西安远航真空钎焊技术有限公司 | Brazing method of core body switching section assembly |
| CN114110657A (en) * | 2021-11-11 | 2022-03-01 | 中国航发贵阳发动机设计研究所 | Cooling structure for head of flame tube of combustion chamber of middle-thrust aircraft engine |
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