CN106001825A - Connecting method for corrosion-resistant high-temperature alloy pipe and corrosion-resistant high-temperature pipe plate and heat exchanger - Google Patents
Connecting method for corrosion-resistant high-temperature alloy pipe and corrosion-resistant high-temperature pipe plate and heat exchanger Download PDFInfo
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- CN106001825A CN106001825A CN201610532317.9A CN201610532317A CN106001825A CN 106001825 A CN106001825 A CN 106001825A CN 201610532317 A CN201610532317 A CN 201610532317A CN 106001825 A CN106001825 A CN 106001825A
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- pipe
- tube
- tube sheet
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- pore
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Classifications
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- 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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
- B23K31/027—Making tubes with soldering or welding
-
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3013—Au as the principal constituent
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/14—Heat exchangers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention discloses a connecting method for a corrosion-resistant high-temperature alloy pipe and a corrosion-resistant high-temperature pipe plate. The connecting method includes the steps that firstly, a pipe hole is machined in the pipe plate, a U-shaped annular feeding groove for containing a brazing filler metal ring is machined around the pipe hole and in the upper side of the pipe plate, the inner diameter of the U-shaped annular feeding groove is not smaller than the sum of the outer diameter of the pipe plus 1 mm, and a plurality of feeding holes which communicate with the U-shaped annular feeding groove and the pipe hole are evenly distributed in the circumferential direction of the pipe hole; secondly, the pipe penetrates through the pipe hole, the lower end of the pipe is made to protrude out of the lower side plane of the pipe plate, then the protruding part at the lower end of the pipe is expanded, and finally, the protruding part at the lower end of the pipe is pressed into the pipe hole; thirdly, fusion welding is carried out on the joint of the lower end of the pipe and the lower side of the pipe plate, and the weld penetration is not smaller than the wall thickness of the pipe; and fourthly, the brazing filler metal ring is put into the U-shaped annular feeding groove, and vacuum brazing is carried out. The invention further discloses a corrosion-resistant high-temperature alloy heat exchanger. By means of the connecting method for the corrosion-resistant high-temperature alloy pipe and the corrosion-resistant high-temperature pipe plate, and the heat exchanger, full-thickness alloy combination between the pipe and the pipe plate can be guaranteed.
Description
Technical field
The present invention relates to tube-plate method of attachment, particularly relate to a kind of anticorrosion superalloy tube-plate method of attachment.
Background technology
Forth generation nuclear reactor-MSR has inherent safety and the advantage such as efficiently because of it, becomes the important development direction in following nuclear power field.This reactor operating temperature is 600 DEG C ~ 700 DEG C, use the fused salt that corrosivity is strong as coolant, using the nickel base superalloy of anti-fused salt corrosion (the Hastelloy N alloy of such as U.S.'s Oak Ridge development in laboratory or the GH3535 alloy of R&D institution of China exploitation) as structural material, construction nuclear reactor is necessary to ensure that and produces high-quality nuclear equipment, and fused salt heat exchanging device is as the nucleus equipment of reactor, its reliability manufactured, the reliability that especially heat exchanger tube-plate connects is particularly important.
The method of attachment of traditional Tube Sheet of Heat Exchanger-tube sheet joint mainly has three kinds: (1) tube sheet end and the argon tungsten-arc welding of pipe, this welding manner only obtains the weld seam of certain fusion penetration, there is the gap between bigger tube-to-tube sheet connection, the existence in this gap causes the root of weld to there is the danger that big stress is concentrated and be there is crevice corrosion, is susceptible to lose efficacy at Service Environment down tube-tube sheet joint that harshness is severe；(2) the expanded joint weldering of tube-to-tube sheet connection, the i.e. mode of expanded joint+welding, this welding manner is applied to running temperature less than in the vaporizer of the presurized water reactor of less than 350 DEG C, but expanded joint belongs to mechanical bond rather than metallurgical binding, material can occur the phenomenons such as creep relaxation at a higher temperature, therefore expanded joint position easily gets loose, and then causes weld stress to concentrate and lost efficacy；(3) tube-to-tube sheet connection internal bore welding technology, this welding manner needs to be furnished with in special welding gun is deeply managed and welds, and due to MSR heat exchanger heat-exchanging tube internal diameter the most about 10mm, the most not yet has the welding gun of maturation to can be used for the welding of internal bore welding.
Therefore, material behavior and the operating mode of high temperature height corrosion for anticorrosion superalloy, how to provide the method for attachment of a kind of tube-plate, it is to avoid the stress of joint concentrates cracking and the danger of crevice corrosion, the service life and the safety that improve heat exchanger are the problems that those skilled in the art need to solve.
Summary of the invention
The technical problem to be solved is to overcome prior art not enough, a kind of anticorrosion superalloy tube-plate method of attachment is provided, can ensure that the metallurgical binding forming through thickness between tube-to-tube sheet connection, joint stress is avoided to concentrate cracking, prevent crevice corrosion, thus improve service life and the safety of the similar such equipment of MSR heat exchanger.
Anticorrosion superalloy tube-plate method of attachment proposed by the invention, comprises the following steps:
Step 1, on tube sheet, process diameter than tube outer diameter big 0.08～the pore of 0.16mm, around described the machining of drilling for placing the U-shaped ring-type feeding groove of solder ring on the upside of tube sheet, the internal diameter of U-shaped ring-type feeding groove is not less than tube outer diameter+1mm, and arranges the U-shaped ring-type feeding groove of connection and pore and along the pore equally distributed multiple feed hole of circumference；
Step 2, by pipe through pore make pipe lower end highlight tube sheet underside plan, the part that then pipe lower end highlights tube sheet underside plan carries out tube expansion, make tube outer diameter maximum 0.5mm bigger than pore diameter after tube expansion, finally pipe lower end is pressed into pore, until concordant with tube sheet underside plan；
Step 3, junction on the downside of pipe lower end and tube sheet being carried out fusion welds, weld penetration is not less than the wall thickness of pipe；
Step 4, in described U-shaped ring-type feeding groove, insert solder ring after carry out vacuum brazing.
Preferably, the material of described solder ring is gold nickel alloy；Preferably quality proportioning is 82%Au and 18%Ni.
Preferably, the technological parameter of described vacuum brazing is specific as follows: the vacuum 10 of vacuum brazing-2More than handkerchief, programming rate is not more than 10 DEG C/min, pilot process 900 DEG C insulation 20min, brazing temperature 1000～1020 DEG C, temperature retention time 20～60min, comes out of the stove be down to the temperature of less than 400 DEG C with the rate of temperature fall of no more than 5 DEG C/min after.
Preferably, 30 ° of angles are become between the axis of described feed hole and tube bore axis.
Preferably, the part using the hard alloy pressure head of tapering 30 ° that pipe lower end highlights tube sheet underside plan in step 2 carries out hydraulic expanding tube, then uses hydraulic press that pipe lower end is pressed into pore.
Further, U-shaped ring groove for reduce fusion welds stress is pre-machined around described pore on the downside of tube sheet, the internal diameter of this U-shaped ring groove is not less than+2 times of pipe wall thickness of tube outer diameter, and U-shaped ring groove width is not less than pipe wall thickness, and the U-shaped ring groove degree of depth is not less than pipe wall thickness.Use the program can effectively reduce the welding stress of fusion welds.
Described anticorrosion superalloy can be the existing all kinds of anticorrosion superalloys maybe having, such as Hastelloy N alloy or GH3535 alloy.The anticorrosion superalloy material that tube sheet and pipe are used can be identical, it is also possible to different.
Can also obtain a kind of anticorrosion superalloy heat exchanger according to identical invention thinking, including the one group of pipe being connected with tube sheet, described tube sheet is connected by method of attachment described in any of the above-described technical scheme with pipe.
Compared to existing technology, the method have the advantages that
The through thickness metallurgy of anticorrosion superalloy tube sheet and pipe that the present invention can realize big thickness is connected, and tube plate thickness is up to 130mm, and this is that prior art is beyond one's reach；
The tube-plate joint that the inventive method connects avoids stress and concentrates cracking and the danger of crevice corrosion, is effectively increased service life and the safety of the used equipment under high temperature height corrosive environment such as MSR heat exchanger.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of one preferred embodiment of the inventive method；Wherein, 1 is tube sheet, and 2 is pore, and 3 is pipe, and 4 is the U-shaped ring groove on the downside of tube sheet, and 5 is the U-shaped ring-type feeding groove on the upside of tube sheet, and 6 is feed hole, and 7 is the argon-arc welding seam on the downside of tube sheet with pipe junction, and 8 is soldered seam.
Detailed description of the invention
Below in conjunction with the accompanying drawings technical scheme is described in detail:
The present invention is directed to the anticorrosion superalloy tube-plate that prior art has been difficult to and be reliably connected problem, propose a kind of new method of attachment, the techniques such as expanded joint, melting welding, soldering are organically combined, it is achieved thereby that the tube sheet that thickness is up to 130mm is connected with the through thickness of pipe, and tube-plate joint avoids stress and concentrates the danger of cracking and crevice corrosion, switching performance fully meets the safe operation requirements of used equipment under high temperature height corrosive environment such as MSR heat exchanger.Technical solution of the present invention is specific as follows:
Step 1, on tube sheet, process diameter than tube outer diameter big 0.08～the pore of 0.16mm, around described the machining of drilling for placing the U-shaped ring-type feeding groove of solder ring on the upside of tube sheet, the internal diameter of U-shaped ring-type feeding groove is not less than tube outer diameter+1mm, and arranges the U-shaped ring-type feeding groove of connection and pore and along the pore equally distributed multiple feed hole of circumference；
Step 2, by pipe through pore make pipe lower end highlight tube sheet underside plan, the part that then pipe lower end highlights tube sheet underside plan carries out tube expansion, make tube outer diameter maximum 0.5mm bigger than pore diameter after tube expansion, finally pipe lower end is pressed into pore, until concordant with tube sheet underside plan；
Step 3, junction on the downside of pipe lower end and tube sheet being carried out fusion welds, weld penetration is not less than the wall thickness of pipe；
Step 4, in described U-shaped ring-type feeding groove, insert solder ring after carry out vacuum brazing.
For the ease of public understanding, with a preferred embodiment, technical solution of the present invention is described in detail below.
The present embodiment is as a example by the tube sheet and pipe connection of MSR heat exchanger, and tube sheet and the used material of pipe are GH3535 alloy, and the thickness of heat exchanger tube sheet reaches 130mm, and tube outer diameter is 13.72mm；In the present embodiment tube sheet with the connection procedure of pipe as it is shown in figure 1, specific as follows:
Step 1, the processing of tube sheet: on tube sheet, process diameter than tube outer diameter big 0.08～the pore of 0.16mm, around described the machining of drilling for placing the U-shaped ring-type feeding groove of solder ring on the upside of tube sheet, the internal diameter of U-shaped ring-type feeding groove is not less than tube outer diameter+1mm, and arranges the U-shaped ring-type feeding groove of connection and pore and along the pore equally distributed multiple feed hole of circumference；
In the present embodiment, as it is shown in figure 1, first process pore 2, pore 2 diameter 13.80mm on 130mm thickness tube sheet 1；Around pore 2 processing for placing the U-shaped ring-type feeding groove 5 of solder ring on the upside of tube sheet 1, depending on the concrete size of groove is according to solder needed for soldering, the internal diameter of the present embodiment further groove 5 is 16mm, and width is 2.5mm, and the degree of depth is 2.5mm；Connect U-shaped ring-type feeding groove 5 and pore 2 along the every 120 ° of processing of pore 2 circumference one and become the feed hole 6 of 30 °, a diameter of 2.3mm of each feed hole 6 in the present embodiment with tube bore axis.
The present invention also can further on the downside of tube sheet around the U-shaped ring groove of the machining of drilling with reduce argon arc welding welding stress, the internal diameter of this U-shaped ring groove is not less than+2 times of pipe wall thickness of tube outer diameter, U-shaped ring groove width is not less than pipe wall thickness, and the U-shaped ring groove degree of depth is not less than pipe wall thickness；As it is shown in figure 1, the internal diameter of U-shaped ring groove 4 is 17.12mm in the present embodiment, width is 1.8mm, and the degree of depth is 2.3mm.
Step 2, by pipe through pore make pipe lower end highlight tube sheet underside plan, the part that then pipe lower end highlights tube sheet underside plan carries out tube expansion, make tube outer diameter maximum 0.5mm bigger than pore diameter after tube expansion, finally pipe lower end is pressed into pore, until concordant with tube sheet underside plan；
First through pore 2 and making pipe 3 lower end protrude from tube sheet 1 underside plan on pipe 3, the part that then pipe 3 lower end highlights tube sheet 2 underside plan carries out tube expansion.The present embodiment cleans up pipe 3 and tube sheet 1 with detergent and acetone etc., the part using the hard alloy pressure head of tapering 30 ° that pipe 3 lower end is highlighted tube sheet 2 underside plan carries out hydraulic expanding tube, tube expansion pressure about 15KN so that than the pore 2 big 0.5mm of diameter at pipe 3 largest outside diameter after tube expansion；Then hydraulic press is utilized the lower end protruding portion of the pipe 3 after tube expansion to be pressed into pore 2, until the lower end of pipe 3 is concordant with tube sheet 1 underside plan；Ensure pipe 3 and pore 2 with one heart, to guarantee the reasonable clearance of soldering during hydraulic pressure as far as possible.
Step 3, end fusion welds: junction on the downside of pipe lower end and tube sheet is carried out fusion welds, and weld penetration is not less than the wall thickness of pipe；
Can use the fusion welds modes such as argon arc welding, plasma arc welding (PAW), Laser Welding that pipe lower end is welded with junction on the downside of tube sheet; the present embodiment uses argon tungsten-arc welding; its technological parameter is specific as follows: be passed through the high-purity argon protection gas that flow is 15L/min; electrode is to workpiece distance 1mm; welding current 45A, speed of welding 10mm/s.As it is shown in figure 1, the fusion penetration of obtained argon-arc welding seam 7 is slightly larger than the wall thickness of pipe 3.It is pre-set at the U-shaped ring groove 4 on the downside of tube sheet 1 and can effectively eliminate the welding stress of fusion welds.
Step 4, the vacuum brazing of tube-to-tube sheet connection: after inserting solder ring in described U-shaped ring-type feeding groove, carry out vacuum brazing；
For anticorrosion superalloy material behavior and and special use environment, present invention preferably employs gold nickel alloy solder and tube-to-tube sheet connection carried out vacuum brazing, wherein, the preferred mass proportioning of gold nickel alloy solder is 82%Au and 18%Ni.Specifically, complete tungsten argon arc postwelding, the U-shaped ring-type feeding groove 5 on the upside of tube sheet is put into the solder ring of 82Au-18Ni, then tube sheet and pipe entirety is put into vacuum brazing furnace and carry out vacuum brazing, the technological parameter of vacuum brazing: vacuum 10-2More than handkerchief, programming rate is not more than 10 DEG C/min, pilot process 900 DEG C insulation 20min, brazing temperature 1020 DEG C, temperature retention time 60min, comes out of the stove be down to the temperature of less than 400 DEG C with the rate of temperature fall of no more than 5 DEG C/min after.In brazing process, the solder of 82Au-18Ni is changed into liquid, is packed into the gap between tube sheet 1 with pipe 3 the GH3535 alloy phase counterdiffusion with tube sheet 1 and pipe 3 by feed hole 6, ultimately forms the soldered seam 8 in Fig. 1.
In order to verify the effect of above-mentioned method of attachment, the tube-plate joint completing to connect is detected, particularly as follows: tube-plate joint is carried out liquid penetration examination and ultrasound detection, joint quality meets the acceptance requirement of ASME NB one-level parts, in addition, butt joint carries out 5.5MPa, the hydraulic pressure test of pressurize 10min, joint No leakage.Testing result proves that heat exchanger tube-plate quality of connection fully meets MSR operating mode and uses requirement.
Above example absolutely proves that the inventive method can meet being reliably connected between anticorrosion superalloy tube-plate completely, and the development for advanced nuclear reactor is significant；Especially the inventive method can realize thickness and reaches big thickness tube sheet thick for 130mm and be connected with the safe and reliable of pipe, thus service life and the safety of MSR heat exchanger is greatly improved, and this is that prior art cannot realize.
Claims (11)
1. anticorrosion superalloy tube-plate method of attachment, it is characterised in that comprise the following steps:
Step 1, on tube sheet, process diameter than tube outer diameter big 0.08～the pore of 0.16mm, around described the machining of drilling for placing the U-shaped ring-type feeding groove of solder ring on the upside of tube sheet, the internal diameter of U-shaped ring-type feeding groove is not less than tube outer diameter+1mm, and arranges the U-shaped ring-type feeding groove of connection and pore and along the pore equally distributed multiple feed hole of circumference；
Step 2, by pipe through pore make pipe lower end highlight tube sheet underside plan, the part that then pipe lower end highlights tube sheet underside plan carries out tube expansion, make tube outer diameter maximum 0.5mm bigger than pore diameter after tube expansion, finally pipe lower end is pressed into pore, makes pipe lower end until concordant with tube sheet underside plan；
Step 3, junction on the downside of pipe lower end and tube sheet being carried out fusion welds, weld penetration is not less than the wall thickness of pipe；
Step 4, in described U-shaped ring-type feeding groove, insert solder ring after carry out vacuum brazing.
2. tube-plate method of attachment as claimed in claim 1, it is characterised in that the material of described solder ring is gold nickel alloy.
3. tube-plate method of attachment as claimed in claim 2, it is characterised in that the quality proportioning of described gold nickel alloy is 82%Au and 18%Ni.
4. tube-plate method of attachment as claimed in claim 3, it is characterised in that the technological parameter of described vacuum brazing is specific as follows: the vacuum 10 of vacuum brazing-2More than handkerchief, programming rate is not more than 10 DEG C/min, pilot process 900 DEG C insulation 20min, brazing temperature 1000～1020 DEG C, temperature retention time 20～60min, comes out of the stove be down to the temperature of less than 400 DEG C with the rate of temperature fall of no more than 5 DEG C/min after.
5. tube-plate method of attachment as claimed in claim 1, it is characterized in that, U-shaped ring groove for reduce fusion welds stress is pre-machined around described pore on the downside of tube sheet, the internal diameter of this U-shaped ring groove is not less than+2 times of pipe wall thickness of tube outer diameter, U-shaped ring groove width is not less than pipe wall thickness, and the U-shaped ring groove degree of depth is not less than pipe wall thickness.
6. tube-plate method of attachment as claimed in claim 1, it is characterised in that become 30 ° of angles between the axis of described feed hole and tube bore axis.
7. tube-plate method of attachment as claimed in claim 1, it is characterised in that the part using hard alloy pressure head that pipe lower end highlights tube sheet underside plan in step 2 carries out hydraulic expanding tube, then uses hydraulic press that pipe lower end is pressed into pore.
8. tube-plate method of attachment as claimed in claim 1, it is characterised in that described fusion welds is argon tungsten-arc welding, and its technological parameter is specific as follows: the flow of argon is 15L/min, electrode to workpiece distance 1mm, welding current 45A, speed of welding 10mm/s.
9. tube-plate method of attachment as claimed in claim 1, it is characterised in that described anticorrosion superalloy is MSR nickel base superalloy.
10. tube-plate method of attachment as claimed in claim 9, it is characterised in that described MSR nickel base superalloy is Hastelloy N alloy or GH3535 alloy.
11. 1 kinds of anticorrosion superalloy heat exchangers, including the one group of pipe being connected with tube sheet, it is characterised in that described tube sheet is connected by method of attachment described in any one of claim 1～10 with pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610532317.9A CN106001825B (en) | 2016-07-08 | 2016-07-08 | Anticorrosion superalloy pipe tube sheet connection method and heat exchanger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610532317.9A CN106001825B (en) | 2016-07-08 | 2016-07-08 | Anticorrosion superalloy pipe tube sheet connection method and heat exchanger |
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| CN106001825A true CN106001825A (en) | 2016-10-12 |
| CN106001825B CN106001825B (en) | 2018-03-30 |
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Cited By (5)
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| CN108031941A (en) * | 2017-12-20 | 2018-05-15 | 中国航发贵州红林航空动力控制科技有限公司 | A kind of method of high temperature alloy and Co-based powder metallurgical material vacuum brazing |
| CN110977074A (en) * | 2019-11-21 | 2020-04-10 | 中国航发沈阳黎明航空发动机有限责任公司 | Furnace brazing method of nickel-based high-temperature alloy material |
| CN111375856A (en) * | 2018-12-27 | 2020-07-07 | 航天海鹰(哈尔滨)钛业有限公司 | Method for welding high-efficiency capillary heat exchanger |
| CN112229063A (en) * | 2020-10-19 | 2021-01-15 | 绍兴森田换热器有限公司 | Heat absorbing sheet and stainless steel heat exchanger with same |
| CN114147362A (en) * | 2021-12-08 | 2022-03-08 | 西北有色金属研究院 | Method for improving corrosion resistance of stainless steel pipe plate joint weld of space nuclear reactor container |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108031941A (en) * | 2017-12-20 | 2018-05-15 | 中国航发贵州红林航空动力控制科技有限公司 | A kind of method of high temperature alloy and Co-based powder metallurgical material vacuum brazing |
| CN111375856A (en) * | 2018-12-27 | 2020-07-07 | 航天海鹰(哈尔滨)钛业有限公司 | Method for welding high-efficiency capillary heat exchanger |
| CN111375856B (en) * | 2018-12-27 | 2021-11-05 | 航天海鹰(哈尔滨)钛业有限公司 | Method for welding high-efficiency capillary heat exchanger |
| CN110977074A (en) * | 2019-11-21 | 2020-04-10 | 中国航发沈阳黎明航空发动机有限责任公司 | Furnace brazing method of nickel-based high-temperature alloy material |
| CN110977074B (en) * | 2019-11-21 | 2021-10-22 | 中国航发沈阳黎明航空发动机有限责任公司 | Furnace brazing method of nickel-based high-temperature alloy material |
| CN112229063A (en) * | 2020-10-19 | 2021-01-15 | 绍兴森田换热器有限公司 | Heat absorbing sheet and stainless steel heat exchanger with same |
| CN114147362A (en) * | 2021-12-08 | 2022-03-08 | 西北有色金属研究院 | Method for improving corrosion resistance of stainless steel pipe plate joint weld of space nuclear reactor container |
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| CN106001825B (en) | 2018-03-30 |
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