CN104339079A - Preparation method of welded bellows - Google Patents
Preparation method of welded bellows Download PDFInfo
- Publication number
- CN104339079A CN104339079A CN201310336020.1A CN201310336020A CN104339079A CN 104339079 A CN104339079 A CN 104339079A CN 201310336020 A CN201310336020 A CN 201310336020A CN 104339079 A CN104339079 A CN 104339079A
- Authority
- CN
- China
- Prior art keywords
- welding
- bellows
- temperature
- diaphragm
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/001—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by extrusion or drawing
-
- 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/14—Preventing or minimising gas access, or using protective gases or vacuum during 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/16—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating with interposition of special material to facilitate connection of the parts, e.g. material for absorbing or producing gas
-
- 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
- B23K2101/06—Tubes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Diaphragms And Bellows (AREA)
Abstract
The invention provides a preparation method of welded bellows. The method comprises the following steps: cleaning a membrane of the punched and prepared bellows, stacking and putting the membrane in a welding die, adding intermediate transitional metal layers on the outer edge of one side of the membrane and the inner edge of the other side (plating the intermediate transitional metal membrane layer on the outer edge of one of the sides of the membrane and the inner edge of the other side), and at last placing the welding die in a high-temperature furnace to be heated to a certain temperature and keeping the temperature for a certain time. The preparation method utilizes the characteristic that the coefficients of thermal expansion of different materials are different, and enables the welding die to generate pressure to the membrane of the bellows at high temperature, so as to allow the membrane of the bellows to achieve the pressure diffusion and welding purpose. The preparation method of the welded bellows disclosed by the invention is simple, feasible, low in welding temperature, low in cost, high in rate of finished products, and capable of quickly preparing a plurality of welded bellows at a time and increasing the production efficiency.
Description
Technical field
The present invention relates to the manufacturing technology of bellows, particularly relate to a kind of welding method of bellows.
Background technology
The external production at welding bellows and application aspect have longer history, welded bellows has just been there is as far back as late nineteenth century, welding bellows is one of principal item of metal bellows, and it has the advantage that some hydroforming bellowss can not be compared.Recent two decades comes, and welding bellows causes the attention of people, in instrument and meter electronics industry and space technology etc., obtain application.The manufacture method of welding bellows is different from hydroforming, and it adopts exquisite solder technology, the ring-type diaphragm of punching in advance alternately welded along its outer edge and makes.Although this technics comparing elaborate, costly.But because materials processing distortion is little, dimensional accuracy easily controls, therefore, obtained welding bellows have highly sensitive, good linearity, delayed little, displacement large, elastic performance and the advantage such as effective area deviation is little.In addition, this process in addition can the poor and good material of elasticity of working plasticity, for the bellows developing the special materials such as high temperature resistant, corrosion-resistant, high strength opens approach.The general external diameter of size range of welding bellows product is 32-850 millimeter (internal diameter is 10-760 millimeter), also has external diameter to be less than the miniature welding bellows of 10 millimeters.Material thickness is generally 0.03-0.6.0 millimeter.The length of welding bellows is not more than 1.5 times of external diameter usually.The material adopted is diversified.Mainly contain stainless steel, monel metal, nickel, Ni-based constant modulus alloy, Hirst Lip river alloy etc.Along with the development of science and technology and improving constantly of welding procedure level, welding bellows is widely used in the space field such as aviation and aerospace and electronics industry and other industry.
The technological process of traditional welding bellows is as follows: punching diaphragm-oil removing-welding-mechanically stable-pickling-oven dry-detection.The key of welding bellows technique is punching, the operation such as welding and detection of diaphragm.Because the quality of diaphragm directly affects later welding quality, so, require that punching is that diaphragm has higher geometric accuracy, impulse-free robustness, any surface finish.During diaphragm below punching 0.1 mm of thickness, very high to the required precision of mould, be generally adopt gapless punch die.Welding method has electric resistance welding, argon arc welding and plasma weldering etc. several usually.Inspection is the important measures ensureing welding bellows quality, and the purposes of element is different with technical requirement, the item mouth of inspection also different as measuring cell time, require detection rigidity, characteristic, effective area.Do vacuum seal or for other occasions without characteristic requirements time, just require to detect leak, withstand voltage or fatigue life etc.Occasion for special applications also will through tests such as high temperature resistant, corrosion-resistant and resistance to irradiation.
The core of welding bellows manufacturing process is welding procedure, and at present, except employing Plasma Welding, some unit also carries out the research of the aspect such as electron beam welding and laser weld; But all these solder technology production efficiencys are low, the cost of welding bellows is very high.In order to solve the problem of production in enormous quantities, developing special high efficiency solder technology and having become very important problem.In order to realize the high-quality of welding production, low cost, high efficiency important channel, the technology that the present invention adopts pressure diffusion to weld carries out the preparation of welding bellows.
Pressure diffusion solder technology is a kind of various material solder technology of extensive use, it refers to the surface contacted with each other, under the effect that high temperature is suppressed, be connected surface close to each other, locally there is plastic deformation, after certain hour, phase counterdiffusion between binder course atom and form the overall reliable process connected.Diffusion welding process roughly can be divided into physical contact stage, chemical action stage and volumetric stage.First stage is the physical contact stage, is connected surface under pressure and temperature effect, and always have some points first to reach plastic deformation, under the effect of continuous, contact interface expands the reliable contacts finally reaching whole gradually.Second stage is the chemical action stage, the atom phase counterdiffusion of the contact interface be now activated, and produces atom and is good for, form firmly binder course.Phase III is the volumetric stage, and the binder course formed in contact portion, gradually to volume future development, forms reliably surface and connects.These three processes are not separated from each other and complete alone, but mutually overlappingly to carry out, the result of whole effect is because the processes such as diffusion and recrystallization form stable solid-state bond in junction, it can generate solid solution and eutectic, sometimes generate intermetallic compound, formed and connect reliably.The quality of selection on weld interface of Diffusion Welding parameter has important impact.The parameter of Diffusion Welding mainly contains: the selection etc. in temperature, pressure, time, gas medium, surface state and intermediate layer.Pressure is wherein a very important parameter, and it is the necessary condition realizing required physical contact.The pressure of now general pressure diffusion solder technology is external pressurized, if adopt general pressure diffusion solder technology to manufacture welding bellows, will affect the manufacture efficiency of bellows, thus improve the cost of bellows.In order to address this problem, the feature that the present invention utilizes the thermal coefficient of expansion of different metal different, adopt mould to apply pressure to bellows, such high temperature furnace just once can weld multiple bellows or continuous welding bellows.
Summary of the invention
(1) technical problem that will solve
In view of above-mentioned technical problem, the invention provides the preparation method of welding bellows, to promote the production efficiency of welding bellows, reduce manufacturing cost.
(2) technical scheme
According to an aspect of the present invention, a kind of preparation method of welding bellows is provided.The method comprises: bellows diaphragm punching press prepared cleans up, then weld mold is put in diaphragm superposition, the outward flange in a diaphragm face and the inward flange in another face put into transition metal layer (or the outward flange in a diaphragm face is coated with transition metal rete with the inward flange in another face), finally weld mold is put into high temperature furnace and be heated to uniform temperature and held for some time, utilize the feature that the thermal coefficient of expansion of different materials is different, weld mold is made to produce pressure when high temperature to bellows diaphragm, thus make bellows diaphragm reach the object of pressure diffusion welding.
In diffusion welding process, in order to reduce welding temperature, control inerface reaction, accelerating welding process, reduce requirement or the tissue preventing from occurring in joint being harmful to, the suppression of welding surface roughness or change interfacial reaction products to improve the performance of junction, be everlasting and between welding diaphragm edge surface, add the intermediate sandwich material of special component, its thickness is at about 0.01mm, or adopt the technology such as chemical plating process, magnetron sputtering plating to be coated with transition metal rete, thicknesses of layers is at 2-50 μm.Preparation intermediate layer can adopt single soft metal, also can adopt multiple layer metal.There are Ni, Cu and Al etc. in intermediate layer, soft metal, and their plasticity is good, and yield strength is low, alleviates the residual stress of contact position by plastic deformation and the deformation of creep.
The coefficient of expansion of pressure diffusion weld mold material therefor should be less than the coefficient of expansion of bellows diaphragm material.The pressure that mould at high temperature produces can make junction microscopic protrusions part produce plastic deformation, makes it to reach close contact state, and provides deformation energy to be that atoms permeating creates conditions.Higher pressure energy produces good joint.Upper pressure limit depends on the limit of butt-welding fitting structural strain's amount, equipment tonnage etc.For dissimilar metal diffusion welding (DW), adopt larger pressure to minimizing or prevent diffusion hole from having effect.Usual diffusion welding (DW) pressure is selected between 0.5-50MPa.Selected pressure will remain on usually slightly lower than the yield stress at selected temperature.
Temperature is the most important technological parameter of diffusion welding (DW), and temperature affects the yield strength of materials to be welded and the dispersal behavior of atom, plays conclusive effect to elimination space.The minor variations of temperature can make diffusion welding (DW) speed produce larger change.In certain temperature range, temperature is higher, and diffusion process is faster, and the strength of joint obtained is also high.Consider from this point, higher diffusion welding (DW) temperature should be selected as far as possible.But heating-up temperature is subject to the elevated temperature strength of welded piece and fixture, and the metallurgy characteristic such as phase transformation, recrystallization of workpiece limited, and to many metals and alloy, diffusion welding (DW) temperature is 0.5-0.8T
m(K), T
mfor the fusing point of low melting point welding material.
Time length required for pressure diffusion welding can produce material impact to the uniformity of contact position microstructure and composition, generally can look connecting material, and the pressure and temperature of welding is selected.Under general conditions, the Diffusion Welding time is at 10-200min.
High temperature furnace adopts high-temperature vacuum furnace, also can be have protective gas (as H
2, N
2deng) high temperature furnace.
(3) beneficial effect
As can be seen from technique scheme, the preparation method of welding bellows of the present invention has following beneficial effect: simple, welding temperature is low, cost is low, yield rate is high, can the multiple welding bellows of disposable preparation very fast, improve production efficiency.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of pressure diffusion welding bellows;
Fig. 2 is the flow chart of embodiment of the present invention pressure diffusion welding bellows method.
[main element symbol description of the present invention]
1-bellows diaphragm; 2-nut;
3-bolt; 4-transition metal films or diaphragm;
5-clamping cap.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.It should be noted that, in accompanying drawing or description describe, similar or identical part all uses identical figure number.The implementation not illustrating in accompanying drawing or describe is form known to a person of ordinary skill in the art in art.In addition, although herein can providing package containing the demonstration of the parameter of particular value, should be appreciated that, parameter without the need to definitely equaling corresponding value, but can be similar to corresponding value in acceptable error margin or design constraint.
The bellows diaphragm that first punching press prepares by the present invention cleans up, then weld mold is put in diaphragm superposition, the outward flange in a diaphragm face and the inward flange in another face put into transition metal layer (or the outward flange in a diaphragm face is coated with transition metal rete with the inward flange in another face), finally weld mold are put into high temperature furnace and are heated to uniform temperature and held for some time.
In one exemplary embodiment of the present invention, provide a kind of preparation method of welding bellows.Fig. 1 is the schematic diagram of pressure diffusion welding bellows.Fig. 2 is the flow chart of embodiment of the present invention pressure diffusion welding bellows method.Please refer to Fig. 1 and Fig. 2, the present embodiment comprises:
Steps A, prepares welding bellows diaphragm 1 according to drawing punching press.Because the quality of diaphragm directly affects later welding quality, so require that the diaphragm of punching has higher geometric accuracy, impulse-free robustness, any surface finish.The present invention adopts gapless punch die to prepare the 304 corrugated stainless steel tubing diaphragms of 0.1mm;
Step B, utilizes chemical method to carry out Chemical cleaning oil removing to welding bellows diaphragm 1;
Step C, adds the intermediate sandwich material 4 of special component between welding diaphragm edge surface, or adopts the technology such as chemical plating process, magnetron sputtering plating to be coated with transition metal rete 4.Adopt chemical plating process in the present invention, prepare Cu and the 10 μm Ni of about 5 μm respectively as metal intermediate layer 4 on 304 stainless steel substrate surfaces.Also adopt 0.1mmNi, 0.02mmCu as metal intermediate layer 4 simultaneously;
Step D, puts into weld mold by the diaphragm 1 of the transition metal rete 4 adding special component between edge surface and is tightened by nut 2.In the present embodiment weld mold, nut 2 and bolt 3 adopt the coefficient of expansion to be less than 304 stainless Mu.In order to increase welding pressure, clamping cap 5 adopts 304 stainless steels.
Step e, puts into high temperature furnace the weld mold installing bellows diaphragm 4 and is heated to one
Fixed temperature held for some time.In the present embodiment, Ni, Cu are respectively 850 DEG C and 800 DEG C respectively as temperature during transition metal layer, and insulation is all 30min; High temperature furnace adopts high-temperature vacuum furnace and high temperature hydrogen furnace.
Step F, when furnace temperature drops to below 80 DEG C, takes out welding bellows and detects.Utilize the leak rate of leak detector to welding bellows to detect, leak rate is less than 10
-10pa.m
3/ s.Utilize ESEM butt welded seam district to carry out microstructure observation and energy spectrum analysis, result of the test shows, adopts Cu, Ni to do the performance that transition zone can significantly improve 304 stainless steel Diffusion Welding bellowss.
In sum, weld mold is put in the diaphragm superposition that the outward flange in a face and the inward flange in another face are had transition metal layer by the present invention, again weld mold is put into high temperature furnace and be heated to uniform temperature and held for some time, utilize the feature that the thermal coefficient of expansion of different materials is different, make weld mold produce pressure when high temperature to bellows diaphragm, thus make bellows diaphragm reach the object of pressure diffusion welding.The present invention is simple, welding temperature is low, cost is low, yield rate is high, production efficiency is high, has a good application prospect.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. the preparation method of a welding bellows, it is characterized in that, comprise: the method comprises: it is clean that bellows diaphragm punching press prepared carries out Chemical cleaning, then weld mold is put in diaphragm superposition, the outward flange in a diaphragm face and the inward flange in another face put into transition metal layer (or the outward flange in a diaphragm face is coated with transition metal rete with the inward flange in another face), finally weld mold is put into high temperature furnace and be heated to uniform temperature and held for some time, utilize the feature that the thermal coefficient of expansion of different materials is different, weld mold is made to produce pressure when high temperature to bellows diaphragm, thus make bellows diaphragm reach the object of pressure diffusion welding.
2. method according to claim 1, it is characterized in that, the described intermediate sandwich material adding special component between welding diaphragm edge surface, its thickness is at about 0.01mm, or adopt the technology such as chemical plating process, magnetron sputtering plating to be coated with transition metal rete, thicknesses of layers is at 2-50 μm, and intermediate layer can adopt single soft metal, also can adopt multiple layer metal, metal intermediate layer can select the soft metal that the fusing points such as Ni, Cu, Ag and Al are lower.
3. method according to claim 1, it is characterized in that, the coefficient of expansion of described pressure diffusion weld mold material therefor should be less than the coefficient of expansion of bellows diaphragm material, the pressure that mould at high temperature produces can make junction microscopic protrusions part produce plastic deformation, make it to reach close contact state, and deformation energy is provided, for atoms permeating creates conditions, usual diffusion welding (DW) pressure is selected between 0.5-50MPa, and selected pressure will remain on usually slightly lower than the yield stress at selected temperature.
4. method according to claim 1, is characterized in that, described temperature is the most important technological parameter of diffusion welding (DW), temperature affects the yield strength of materials to be welded and the dispersal behavior of atom, play conclusive effect to elimination space, to many metals and alloy, diffusion welding (DW) temperature is 0.5-0.8T
m(K), T
mfor the fusing point of low melting point welding material.
5. method according to claim 1, it is characterized in that, time length required for described pressure diffusion welding can produce material impact to the uniformity of contact position microstructure and composition, generally connecting material can be looked, and the pressure and temperature of welding is selected, under general conditions, the Diffusion Welding time is at 10-200min.
6. method according to claim 1, is characterized in that, described high temperature furnace can adopt high-temperature vacuum furnace, also can be have protective gas (as H
2, N
2deng) high temperature furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310336020.1A CN104339079A (en) | 2013-08-05 | 2013-08-05 | Preparation method of welded bellows |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310336020.1A CN104339079A (en) | 2013-08-05 | 2013-08-05 | Preparation method of welded bellows |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104339079A true CN104339079A (en) | 2015-02-11 |
Family
ID=52495993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310336020.1A Pending CN104339079A (en) | 2013-08-05 | 2013-08-05 | Preparation method of welded bellows |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104339079A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105032979A (en) * | 2015-08-24 | 2015-11-11 | 北京星航机电装备有限公司 | Machining method and device for multi-layer membrane structure corrugated pipe |
| CN109954760A (en) * | 2017-12-25 | 2019-07-02 | 航天海鹰(哈尔滨)钛业有限公司 | The manufacturing process and bellows stretching tool of titanium alloy V-shaped bellows |
| CN113614420A (en) * | 2019-03-25 | 2021-11-05 | Vat控股公司 | Diaphragm type corrugated pipe |
| CN114406460A (en) * | 2022-01-07 | 2022-04-29 | 苏州尤诗光电科技有限公司 | Laser bar packaging structure, welding fixture and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4184831A (en) * | 1974-06-20 | 1980-01-22 | Hegler Ralph Peter | Apparatus for producing plastic drain pipes |
| CN101135501A (en) * | 2006-08-28 | 2008-03-05 | 中国科学院电工研究所 | High-temperature solar thermal-collecting tube and manufacturing process thereof |
| CN101634381A (en) * | 2008-12-29 | 2010-01-27 | 北京智创联合科技有限公司 | Diffusion welding structure corrugated pipe |
| CN202317350U (en) * | 2011-11-01 | 2012-07-11 | 中国计量学院 | Automatic welding equipment for vacuum corrugated pipe |
| CN102658457A (en) * | 2012-05-15 | 2012-09-12 | 江苏恒丰波纹管有限公司 | Stainless steel corrugated oil storage tank and manufacturing process thereof |
-
2013
- 2013-08-05 CN CN201310336020.1A patent/CN104339079A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4184831A (en) * | 1974-06-20 | 1980-01-22 | Hegler Ralph Peter | Apparatus for producing plastic drain pipes |
| CN101135501A (en) * | 2006-08-28 | 2008-03-05 | 中国科学院电工研究所 | High-temperature solar thermal-collecting tube and manufacturing process thereof |
| CN101634381A (en) * | 2008-12-29 | 2010-01-27 | 北京智创联合科技有限公司 | Diffusion welding structure corrugated pipe |
| CN202317350U (en) * | 2011-11-01 | 2012-07-11 | 中国计量学院 | Automatic welding equipment for vacuum corrugated pipe |
| CN102658457A (en) * | 2012-05-15 | 2012-09-12 | 江苏恒丰波纹管有限公司 | Stainless steel corrugated oil storage tank and manufacturing process thereof |
Non-Patent Citations (1)
| Title |
|---|
| 中国机械工程学会焊接学会: "《焊接手册（第3版）》", 31 January 2008, 机械工业出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105032979A (en) * | 2015-08-24 | 2015-11-11 | 北京星航机电装备有限公司 | Machining method and device for multi-layer membrane structure corrugated pipe |
| CN105032979B (en) * | 2015-08-24 | 2017-06-20 | 北京星航机电装备有限公司 | The processing method and device of a kind of multi-layer diaphragm structure bellows |
| CN109954760A (en) * | 2017-12-25 | 2019-07-02 | 航天海鹰(哈尔滨)钛业有限公司 | The manufacturing process and bellows stretching tool of titanium alloy V-shaped bellows |
| CN113614420A (en) * | 2019-03-25 | 2021-11-05 | Vat控股公司 | Diaphragm type corrugated pipe |
| CN114406460A (en) * | 2022-01-07 | 2022-04-29 | 苏州尤诗光电科技有限公司 | Laser bar packaging structure, welding fixture and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104339079A (en) | Preparation method of welded bellows | |
| Alo et al. | Manufacturing methods for metallic bipolar plates for polymer electrolyte membrane fuel cell | |
| CN104259644B (en) | A kind of welding method of tungsten-titanium alloy target | |
| CN107825046B (en) | Welding tool and welding method for thin-wall corrugated pipe sheet | |
| WO2015085650A1 (en) | Method for diffusion welding w-ti alloy target material assembly | |
| CN112676782B (en) | Method for assembling titanium target and copper back plate | |
| JP2002313354A (en) | Manufacturing method and device for separator for solid polymer fuel cell | |
| EP3328582B1 (en) | Structural braze tape | |
| CN108098257A (en) | A kind of processing method of thermonuclear fusion heap enhancing thermic load the first wall finger component | |
| CN102126112A (en) | Preparation method of electromagnetic shielding multi-layer composite material in electric vacuum device | |
| CN109926748A (en) | A kind of vacuum observation window of brazing metal sealing-in and preparation method thereof | |
| CN101391263A (en) | Manufacture method of transition joint for welding titanium alloy and stainless steel component | |
| WO2011041141A1 (en) | Method for cladding tubes | |
| CN106898784A (en) | A kind of processing method of fuel cell metal double polar plates | |
| CN112082413A (en) | Ultrathin uniform temperature plate and processing method thereof | |
| JP6104909B2 (en) | Fusion reactor first wall components and fabrication process | |
| CN104266003A (en) | Bimetallic composite steel pipe and production method thereof | |
| CN113020735B (en) | Preparation method of silicon nitride ceramic/stainless steel braze welding joint with corrosion resistance and stress relief | |
| JP2018087730A (en) | Diaphragm, pressure sensor using diaphragm and manufacturing method of diaphragm | |
| CN102950390B (en) | A kind of titanium alloy flange and stainless steel pipeline different-metal material welding structure and method | |
| CN108859318B (en) | High-temperature-resistant layered toughened tungsten-based composite material and preparation method thereof | |
| CN106735895A (en) | A kind of method for laser welding of aluminium alloy glass composite | |
| CN114193096B (en) | Hot isostatic pressing diffusion connection method for vanadium alloy and steel | |
| KR101527112B1 (en) | Method for diffusion bonding of nickel-based alloys | |
| CN111037084A (en) | Welding method of niobium alloy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150211 |
|
| WD01 | Invention patent application deemed withdrawn after publication |