CN109848659A - A kind of axisymmetric nozzle integral welding method - Google Patents
A kind of axisymmetric nozzle integral welding method Download PDFInfo
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- CN109848659A CN109848659A CN201910175360.8A CN201910175360A CN109848659A CN 109848659 A CN109848659 A CN 109848659A CN 201910175360 A CN201910175360 A CN 201910175360A CN 109848659 A CN109848659 A CN 109848659A
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- axisymmetric nozzle
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000003466 welding Methods 0.000 title claims abstract description 39
- 239000010935 stainless steel Substances 0.000 claims abstract description 85
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 84
- 229910000881 Cu alloy Inorganic materials 0.000 claims abstract description 71
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000005219 brazing Methods 0.000 claims abstract description 38
- 229910052786 argon Inorganic materials 0.000 claims abstract description 20
- 238000005242 forging Methods 0.000 claims abstract description 17
- 238000005520 cutting process Methods 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 12
- 238000005476 soldering Methods 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 2
- 229910000679 solder Inorganic materials 0.000 abstract description 5
- 238000012360 testing method Methods 0.000 description 8
- 239000010949 copper Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241001424392 Lucia limbaria Species 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 1
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- Arc Welding In General (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention discloses a kind of axisymmetric nozzle integral welding method, includes the following steps: to open up through slot in the middle part of copper alloy forging, prepare copper alloy inner casing；Then the stainless steel casing to match with copper alloy inner casing overall dimensions is prepared；By stainless steel casing along it is axially cutting be several valves, foil-shaped brazing material is paved with to the inner wall of each valve stainless steel casing, stainless steel casing is fitted closely and compressed with the first cambered surface using tooling, sub-assembly is obtained after vacuum brazing；Then it is cut into the compensation block that the cutting seam between each valve stainless steel casing matches, is welded compensation block and stainless steel casing using argon arc welding；Finally through slot lathe process in copper alloy inner casing is formed internal channel, obtain axisymmetric nozzle black box at third cambered surface.The present invention not only reduces the difficulty of processing of axisymmetric nozzle integral solder, and compensation block is arranged at cutting seam, ensure that the integrally-built leakproofness of axisymmetric nozzle.
Description
Technical field
The invention belongs to aerospace equipment technical fields, are related to a kind of axisymmetric nozzle integral welding method.
Background technique
Convergence structural member is applied in the high speed or hypersonic vehicle of aerospace field and wind for the diffusion of jet pipe-
In the test of hole.Under hypersonic flight state, diffusion-convergence structural member venturi section of jet pipe needs to bear high pressure and is more than
The bad working environments condition of 2100 DEG C of high temperature；To improve the use longevity of diffusion-convergence structural member of jet pipe under high temperature and pressure
Life, be typically designed stainless steel and copper alloy it is compound, band there are many thin-walled conduit complicated active cooling structure.
Because of axisymmetric nozzle venturi section diffusion-convergent special construction, copper alloy inner casing is the knot that both ends are big, centre is small
Structure, copper alloy inner casing can not be directly inserted in stainless steel casing when processing, and welding surface is curved surface, whole for axisymmetric nozzle
Body is more demanding to tooling when being brazed, and difficulty of processing is big, and the leakproofness of brazing surface cannot be guaranteed.
Summary of the invention
Present invention solves the technical problem that being to provide a kind of axisymmetric nozzle integral welding method, by stainless steel casing edge
It is axially cutting to be welded for several valves by vacuum brazing and copper alloy inner casing, reduce difficulty of processing；And in stainless steel casing
It cuts and compensation block is set at seam, ensure that the integrally-built leakproofness of axisymmetric nozzle.
The present invention is to be achieved through the following technical solutions:
A kind of axisymmetric nozzle integral welding method, includes the following steps:
(1) through slot is opened up along axial direction in the middle part of cylinder copper alloy forging；The outer wall lathe of cylinder copper alloy forging is added
Work opens up a plurality of cooling channels along axial direction in the first cambered surface at the first cambered surface, obtains copper alloy inner casing；
(2) the interior type hole to match with copper alloy inner casing external form is opened up along axial direction in the middle part of cylinder stainless steel forgings；It will justify
The outer wall lathe process of column stainless steel forgings obtains stainless steel casing at the second cambered surface to match with the first cambered surface radian；
(3) it is cut into stainless steel casing in parts several valves along axial direction；By foil-shaped brazing material by the way of stored energy welding
HBNi82CrSiB is paved with the inner wall of each valve stainless steel casing, with tooling by the inner wall of each valve stainless steel casing successively with copper alloy
The outer wall of inner casing is fitted closely and is compressed, and obtains sub-assembly；
(4) sub-assembly is put into vacuum brazing furnace, heated under vacuum conditions, vacuum brazing, vacuum are carried out to sub-assembly
It is cooled to room temperature and comes out of the stove after soldering；
(5) it is cut into the compensation block that the cutting seam between each valve stainless steel casing matches, will be compensated using argon arc welding
Block is welded with corresponding stainless steel casing, and stainless steel casing is welded as overall structure again；
(6) the third cambered surface that the through slot lathe process in copper alloy inner casing matches at the radian with the first cambered surface,
It forms internal channel and sub-assembly external form lathe process to final size is obtained into axisymmetric nozzle black box.
Further, the diameter of the through slot is less than the minimum dimension of axisymmetric nozzle converging portion.
Further, the minimum dimension of the axisymmetric nozzle converging portion is 50mm.
Further, the pressure of the vacuum brazing in step (4) is 0.01~500Pa, and temperature is 300 DEG C~1100 DEG C, when
Between be 10~12h.
Further, vacuum brazing operation includes the following steps: in step (4)
(1) to vacuum stove evacuation, make in furnace vacuum degree up to 1 × 10-2Pa；
(2) high-purity argon gas is filled into furnace, makes in furnace vacuum degree to 50-150Pa；
(3) 450 DEG C are heated to the speed of 30 DEG C/h, keep the temperature 60min；
(4) 700 DEG C are heated to the speed of 60 DEG C/h, divide 5pa, keep the temperature 60min；
(5) 900 DEG C are heated to the speed of 90 DEG C/h, divide 30pa, keep the temperature 240min；
(6) 1095 ± 5 DEG C are heated to the speed of 100 DEG C/h, divide 50pa, start vacuum brazing, the time is 4~6h.
Further, after soldering, 700 DEG C of pass partial pressure valves are cooled to the rate temperature control of 90 DEG C/h, with furnace vacuum cooled
Gas cooling makes furnace pressure reach 9 × 10 to 200 DEG C of filling high-purity argon gas4Pa, part to be combined are cooled to 65 DEG C and come out of the stove.
Further, the wall thickness of the stainless steel casing is 8~10mm.
Further, the wall thickness of the copper alloy inner casing in step (6) after processing is equal with the wall thickness of stainless steel casing.
Further, the width of the compensation block is 1~3mm.
Further, after being welded compensation block with corresponding stainless steel casing using argon arc welding, weld grinding is smooth.
Compared with prior art, the invention has the following beneficial technical effects:
The invention discloses a kind of axisymmetric nozzle integral welding method, the copper alloy that production both ends are big first, centre is small
Inner casing, and cooling channels are opened up in copper alloy inner casing outside wall surface；Then it prepares and matches not with copper alloy inner casing overall dimensions
Become rusty outer steel shell；Stainless steel casing is segmented into several valves along axial impartial cutting, by foil-shaped brazing material HBNi82CrSiB outside stainless steel
It is paved on the inner wall of shell, and the first cambered surface of stainless steel casing and copper alloy inner casing is fitted closely and compressed using tooling, very
Sub-assembly is obtained after sky soldering；Then it is cut into the compensation block that the cutting seam between each valve stainless steel casing matches, is used
Compensation block and stainless steel casing are welded in argon arc welding；Finally by the through slot lathe process of copper alloy inner casing at the first cambered surface arc
The third cambered surface to match is spent, internal channel is formed, obtains axisymmetric nozzle black box.
Because copper alloy inner casing is that both ends are big, intermediate small structure, copper alloy inner casing can not directly be inserted in stainless steel when processing
In shell, the present invention by stainless steel casing along it is axially cutting be several valves, using vacuum brazing by stainless steel casing and copper alloy
Inner casing is brazed into sub-assembly, reduces the difficulty of processing of axisymmetric nozzle integral solder；And at the cutting seam of stainless steel casing
Compensation block is set, ensure that the integrally-built globality of axisymmetric nozzle and leakproofness.In addition, using tooling to stainless steel casing
When being compressed with copper alloy inner casing, deform when the vacuum brazing of copper alloy inner casing in order to prevent, in copper alloy before vacuum brazing
Through slot is opened up in inner casing, the diameter of through slot is less than the minimum dimension of axisymmetric nozzle converging portion；Vacuum pricker is being carried out to sub-assembly
Postwelding, then the third cambered surface that through slot lathe process in copper alloy inner casing is matched at the radian with the first cambered surface, in formation
Channel；This design not only ensure that fitting closely for stainless steel casing and copper alloy inner casing, but also prevent copper alloy inner casing in vacuum
It deforms when soldering, and then improves the leakproofness of axisymmetric nozzle.
Detailed description of the invention
Fig. 1 is axisymmetric nozzle whole interior structural section figure of the invention；
Wherein, 1 is stainless steel casing, and 2 be copper alloy inner casing.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing, and the explanation of the invention is not limited.
A kind of axisymmetric nozzle integral welding method, includes the following steps:
(1) through slot is opened up along axial direction in the middle part of cylinder copper alloy forging；The outer wall lathe of cylinder copper alloy forging is added
Work opens up a plurality of cooling channels along axial direction in the first cambered surface at the first cambered surface, obtains copper alloy inner casing 2；
(2) the interior type hole to match with 2 external form of copper alloy inner casing is opened up along axial direction in the middle part of cylinder stainless steel forgings；It will justify
The outer wall lathe process of column stainless steel forgings obtains stainless steel casing 1 at the second cambered surface to match with the first cambered surface radian；
(3) it is cut into stainless steel casing 1 in parts several valves along axial direction；By foil-shaped brazing material by the way of stored energy welding
HBNi82CrSiB is paved with each valve in the inner wall of stainless steel casing 1, with tooling by the inner wall of each valve stainless steel casing 1 successively with copper
The outer wall of alloy inner casing 2 is fitted closely and is compressed, and obtains sub-assembly；
(4) sub-assembly is put into vacuum brazing furnace, heated under vacuum conditions, the sub-assembly of inner casing and shell carried out true
Sky soldering, is cooled to room temperature after vacuum brazing and comes out of the stove；
(5) it is cut into the compensation block that the cutting seam between each valve stainless steel casing matches, will be compensated using argon arc welding
Block is welded with corresponding stainless steel casing 1, and stainless steel casing 1 is welded as overall structure again；
(6) the third cambered surface that through slot lathe process in copper alloy inner casing 2 matches at the radian with the first cambered surface, shape
Sub-assembly external form lathe process to final size is obtained into axisymmetric nozzle black box at internal channel.
The present invention is the size according to design requirement, and the method that each component provides through the invention is welded into axial symmetry spray
Pipe black box.Specifically, the present invention opens up through slot along axial direction in the middle part of cylinder copper alloy forging first, the diameter of through slot is less than
The minimum dimension of the converging portion of axisymmetric nozzle design requirement；The outer wall of cylinder copper alloy forging is wanted with lathe process at design
The first cambered surface asked, opens up a plurality of cooling channels in the first cambered surface, for cooling down axisymmetric nozzle, enables axisymmetric nozzle
It works at high temperature.The diameter of through slot is less than the minimum dimension of axisymmetric nozzle converging portion, is to use through slot in order to which the later period facilitates
Lathe process forms internal channel at the third cambered surface to match with the first cambered surface radian.
Specifically, the interior type hole to match with 2 external form of copper alloy inner casing is opened up along axial direction in the middle part of cylinder stainless steel forgings；
By the outer wall lathe process of cylinder stainless steel forgings at the second cambered surface to match with the first cambered surface radian, obtain outside stainless steel
Shell 1.Because copper alloy inner casing 2 and stainless steel casing 1 are the structure that both ends are big, centre is small, copper alloy inner casing 2 can not be directly arranged
Several valves are cut into parts along axial direction in the interior type hole of stainless steel casing 1, therefore by stainless steel casing 1；Optionally, it can incite somebody to action
Stainless steel casing 1 is cut into three valves in parts along axial direction, is paved with foil-shaped brazing material HBNi82CrSiB respectively by the way of stored energy welding
The inner wall of valve stainless steel casing 1, it is with tooling that the inner wall of each valve stainless steel casing 1 is successively close with the outer wall of copper alloy inner casing 2
It is bonded and compresses, obtain sub-assembly.The method comprises the steps of firstly, preparing copper alloy inner casings 2, by 1 pricker of copper alloy inner casing 2 and stainless steel casing
Postwelding finally again processes copper alloy inner casing 2, that through slot lathe process is matched at the radian with the first cambered surface
Three cambered surfaces obtain the sub-assembly of copper alloy inner casing 2 Yu stainless steel casing 1.
It should be noted that when using argon arc welding welding stainless steel casing 1 and compensation block, electric current 80-100A, argon gas stream
Amount is in 5-8L/min, solder wire material 0Cr21Ni10.The tooling is the arc to match with 1 outside cambered surface of stainless steel casing
Stainless steel casing 1 and copper alloy inner casing 2 are positioned and are compressed by shape clamping element, guarantee stainless steel casing 1 and copper alloy inner casing 2
Brazing surface fits closely, and then detects joint clearance of brazing from centre to both sides, guarantees that joint gap is less than or equal to 0.05mm, and
It is even consistent.
Further, the diameter of the through slot is less than the minimum dimension of axisymmetric nozzle converging portion, facilitates the later period to through slot
Processed, by through slot lathe process at the third cambered surface to match with the first cambered surface radian, obtain copper alloy inner casing 2 with not
The sub-assembly of rust outer steel shell 1.
Further, the minimum dimension of the axisymmetric nozzle converging portion is 50mm, i.e., the venturi section of axisymmetric nozzle is most
Small size is 50mm.
Further, the pressure of the vacuum brazing in step (4) is 0.01~500Pa, and temperature is 300 DEG C~1100 DEG C, when
Between be 10~12h.
Further, vacuum brazing operation includes the following steps: in step (4)
(1) to vacuum stove evacuation, make in furnace vacuum degree up to 1 × 10-2Pa；
(2) high-purity argon gas is filled into furnace, makes in furnace vacuum degree to 50-150Pa；
(3) 450 DEG C are heated to the speed of 30 DEG C/h, keep the temperature 60min；
(4) 700 DEG C are heated to the speed of 60 DEG C/h, divide 5pa, keep the temperature 60min；
(5) 900 DEG C are heated to the speed of 90 DEG C/h, divide 30pa, keep the temperature 240min；
(6) 1095 ± 5 DEG C are heated to the speed of 100 DEG C/h, divide 50pa, start vacuum brazing, the time is 4~6h.
Specifically, opening fire door when vacuum brazing for the sub-assembly of stainless steel casing 1 and copper alloy inner casing 2 and being packed into vacuum
In soldering oven effective uniform temperature zone and fire door is shut immediately；Vacuumizing makes in furnace vacuum degree up to 1 × 10-2Pa prevents Mn, Cu in solder
Element evaporation；To high-purity argon gas is filled in furnace, make in furnace vacuum degree to 50-150Pa；Start program heating, to in-furnace temperature liter
When to 1095 ± 5 DEG C, start vacuum brazing.
Further, after soldering, 700 DEG C of pass partial pressure valves are cooled to the rate temperature control of 90 DEG C/h, with furnace vacuum cooled
Gas cooling makes furnace pressure reach 9 × 10 to 200 DEG C of filling high-purity argon gas4Pa, part to be combined are cooled to 65 DEG C and come out of the stove,
Middle purity of argon is 99.999%, for cooling down to sub-assembly in furnace.
Finally, welding O-shaped jet pipe, electric current 80-100A, argon flow 5-8L/min in axisymmetric nozzle two sides respectively.Weldering
Wire material is 0Cr21Ni10, carries out the 8.5MPa water pressure test to interlayer and O-shaped water pipe, keeps 30min, to argon-arc welding seam by
One is checked, is padded to leakage and is carried out significant notation.
Pressure testing finally is carried out to the black box of axisymmetric nozzle, to measure the leakproofness of black box.Specific behaviour
As: the expansion segment and venturi of the black box of the axisymmetric nozzle obtained respectively to vacuum brazing carry out pressure testing,
Every raising 0.5MPa, pressure maintaining 5min under 2.0MPa~9.5MPa, expansion segment and venturi to black box carry out pressure test, survey
Test result is qualification；The pressure maintaining 30min at 10.0MPa, expansion segment and venturi to black box carry out pressure test, test
Result is qualification.
Further, the wall thickness of the stainless steel casing 1 is 8~10mm.
Further, the wall thickness of the copper alloy inner casing 2 in step (6) after processing is equal with the wall thickness of stainless steel casing 1.
Further, the width of the compensation block is 1~3mm.
Further, after being welded compensation block with corresponding stainless steel casing 1 using argon arc welding, weld grinding is smooth.
It should be noted that the material of axisymmetric nozzle is mainly AISI304 and Cr-Zr-Cu.AISI304 solution treatment
It is afterwards single phase austenite tissue, intensity with higher, good toughness, plasticity, weldability and corrosion resistance.Copper alloy
The material of inner casing 2 is Cr-Zr-Cu.Cr-Zr-Cu solid gas coupling reinforced alloys have high-strength highly-conductive characteristic, have good anti-
Corrosion and high-temperature oxidation resistance, it may have good welding performance can bear cold conditions and hot pressure processing well.
By above technical scheme, the present invention provides a kind of axisymmetric nozzle integral welding method, first production both ends it is big,
Intermediate small copper alloy inner casing, and cooling channels are opened up in copper alloy inner casing outside wall surface；Then it prepares and copper alloy inner casing external form
The matched stainless steel casing 1 of size；Stainless steel casing 1 is segmented into several valves along axial impartial cutting, by foil-shaped brazing material
HBNi82CrSiB is paved on the inner wall of stainless steel casing 1, and using tooling by the of stainless steel casing 1 and copper alloy inner casing 2
One cambered surface is fitted closely and is compressed, and sub-assembly is obtained after vacuum brazing；Then it is cut into and cuts slot size phase with stainless steel casing 1
Matched compensation block is welded compensation block and stainless steel casing 1 using argon arc welding；Finally by the through slot lathe of copper alloy inner casing
It is processed into the third cambered surface to match with the radian of the first cambered surface, internal channel is formed, obtains axisymmetric nozzle black box.
Because copper alloy inner casing is that both ends are big, intermediate small structure, copper alloy inner casing can not directly be inserted in stainless steel when processing
In shell, the present invention by stainless steel casing 1 along it is axially cutting be several valves, stainless steel casing 1 and copper are closed using vacuum brazing
Golden inner casing 2 is brazed into sub-assembly, reduces the difficulty of processing of axisymmetric nozzle integral solder；And in the cutting of stainless steel casing 1
Compensation block is set at seam, ensure that the integrally-built globality of axisymmetric nozzle and leakproofness.In addition, using tooling to stainless steel
When shell 1 and copper alloy inner casing 2 compress, deform when 2 vacuum brazing of copper alloy inner casing in order to prevent, before vacuum brazing
Through slot is opened up in copper alloy inner casing 2, the diameter of through slot is less than the minimum dimension of axisymmetric nozzle converging portion；It is carried out to sub-assembly
After vacuum brazing, then the third cambered surface that through slot lathe process in copper alloy inner casing 2 is matched at the radian with the first cambered surface,
Form internal channel；This design not only ensure that fitting closely for stainless steel casing 1 and copper alloy inner casing 2, but also prevent in copper alloy
Shell 2 deforms, and then improves the leakproofness of axisymmetric nozzle.
Example given above is to realize the present invention preferably example, and the present invention is not limited to the above embodiments.This field
Technical staff's technical solution according to the present invention technical characteristic any nonessential addition, the replacement made, belong to this
The protection scope of invention.
Claims (10)
1. a kind of axisymmetric nozzle integral welding method, which comprises the steps of:
(1) through slot is opened up along axial direction in the middle part of cylinder copper alloy forging；By the outer wall lathe process of cylinder copper alloy forging at
First cambered surface opens up a plurality of cooling channels along axial direction in the first cambered surface, obtains copper alloy inner casing；
(2) the interior type hole to match with copper alloy inner casing external form is opened up along axial direction in the middle part of cylinder stainless steel forgings；Not by cylinder
The outer wall lathe process of rust steel forgings obtains stainless steel casing at the second cambered surface to match with the first cambered surface radian；
(3) it is cut into stainless steel casing in parts several valves along axial direction；By foil-shaped brazing material by the way of stored energy welding
HBNi82CrSiB is paved with the inner wall of each valve stainless steel casing, with tooling by the inner wall of each valve stainless steel casing successively with copper alloy
The outer wall of inner casing is fitted closely and is compressed, and obtains sub-assembly；
(4) sub-assembly is put into vacuum brazing furnace, heated under vacuum conditions, vacuum brazing, vacuum brazing are carried out to sub-assembly
After be cooled to room temperature and come out of the stove；
(5) compensation block that matches of cutting seam being cut between each valve stainless steel casing, using argon arc welding by compensation block with
Corresponding stainless steel casing welding, is welded as overall structure for stainless steel casing again；
(6) the third cambered surface that the through slot lathe process in copper alloy inner casing matches at the radian with the first cambered surface is formed
Sub-assembly external form lathe process to final size is obtained axisymmetric nozzle black box by internal channel.
2. axisymmetric nozzle integral welding method according to claim 1, which is characterized in that the diameter of the through slot is small
In the minimum dimension of axisymmetric nozzle converging portion.
3. axisymmetric nozzle integral welding method according to claim 2, which is characterized in that the axisymmetric nozzle is received
The minimum dimension for holding back section is 50mm.
4. axisymmetric nozzle integral welding method according to claim 1, which is characterized in that the vacuum pricker in step (4)
The pressure of weldering is 0.01~500Pa, and temperature is 300 DEG C~1100 DEG C, and the time is 10~12h.
5. axisymmetric nozzle integral welding method according to claim 4, which is characterized in that vacuum brazing in step (4)
Operation includes the following steps:
(1) to vacuum stove evacuation, make in furnace vacuum degree up to 1 × 10-2Pa；
(2) high-purity argon gas is filled into furnace, makes in furnace vacuum degree to 50-150Pa；
(3) 450 DEG C are heated to the speed of 30 DEG C/h, keep the temperature 60min；
(4) 700 DEG C are heated to the speed of 60 DEG C/h, divide 5pa, keep the temperature 60min；
(5) 900 DEG C are heated to the speed of 90 DEG C/h, divide 30pa, keep the temperature 240min；
(6) 1095 ± 5 DEG C are heated to the speed of 100 DEG C/h, divide 50pa, start vacuum brazing, the time is 4~6h.
6. axisymmetric nozzle integral welding method according to claim 5, which is characterized in that after soldering, with 90 DEG C/
The rate temperature control of h is cooled to 700 DEG C of pass partial pressure valves, with furnace vacuum cooled gas cooling to 200 DEG C of filling high-purity argon gas, makes in furnace
Pressure reaches 9 × 104Pa, part to be combined are cooled to 65 DEG C and come out of the stove.
7. axisymmetric nozzle integral welding method according to claim 1, which is characterized in that the stainless steel casing
Wall thickness is 8~10mm.
8. axisymmetric nozzle integral welding method according to claim 7, which is characterized in that in step (6) after processing
The wall thickness of copper alloy inner casing and the wall thickness of stainless steel casing are equal.
9. axisymmetric nozzle integral welding method according to claim 1, which is characterized in that the width of the compensation block
For 1~3mm.
10. axisymmetric nozzle integral welding method according to claim 1, which is characterized in that will be compensated using argon arc welding
It is after block is welded with corresponding stainless steel casing, weld grinding is smooth.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111927335A (en) * | 2020-08-07 | 2020-11-13 | 江苏博联硕焊接技术有限公司 | Petroleum drilling pipe and preparation method thereof |
| CN112338447A (en) * | 2020-10-23 | 2021-02-09 | 西安远航真空钎焊技术有限公司 | Machining method of wide-runner throat structural part |
| CN113352062A (en) * | 2021-08-11 | 2021-09-07 | 西安远航真空钎焊技术有限公司 | Preparation method of combustion chamber cylinder |
| CN113664456A (en) * | 2021-08-10 | 2021-11-19 | 西安远航真空钎焊技术有限公司 | Combustion chamber barrel repairing method based on compensation structure |
| CN113787307A (en) * | 2021-09-09 | 2021-12-14 | 西安远航真空钎焊技术有限公司 | Machining method for pipe section contraction and expansion workpiece |
| CN114571053A (en) * | 2022-03-18 | 2022-06-03 | 北京航天动力研究所 | Titanium alloy vacuum diffusion welding spray pipe and design method |
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| CN112338447A (en) * | 2020-10-23 | 2021-02-09 | 西安远航真空钎焊技术有限公司 | Machining method of wide-runner throat structural part |
| CN113664456A (en) * | 2021-08-10 | 2021-11-19 | 西安远航真空钎焊技术有限公司 | Combustion chamber barrel repairing method based on compensation structure |
| CN113352062A (en) * | 2021-08-11 | 2021-09-07 | 西安远航真空钎焊技术有限公司 | Preparation method of combustion chamber cylinder |
| CN113352062B (en) * | 2021-08-11 | 2021-11-19 | 西安远航真空钎焊技术有限公司 | Preparation method of combustion chamber cylinder |
| CN113787307A (en) * | 2021-09-09 | 2021-12-14 | 西安远航真空钎焊技术有限公司 | Machining method for pipe section contraction and expansion workpiece |
| CN114571053A (en) * | 2022-03-18 | 2022-06-03 | 北京航天动力研究所 | Titanium alloy vacuum diffusion welding spray pipe and design method |
| CN114571053B (en) * | 2022-03-18 | 2023-12-12 | 北京航天动力研究所 | Titanium alloy vacuum diffusion welding spray pipe and design method |
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