CN102658368A - Method for connecting carbon fiber reinforced aluminum-based composite with metal - Google Patents
Method for connecting carbon fiber reinforced aluminum-based composite with metal Download PDFInfo
- Publication number
- CN102658368A CN102658368A CN2012101855309A CN201210185530A CN102658368A CN 102658368 A CN102658368 A CN 102658368A CN 2012101855309 A CN2012101855309 A CN 2012101855309A CN 201210185530 A CN201210185530 A CN 201210185530A CN 102658368 A CN102658368 A CN 102658368A
- Authority
- CN
- China
- Prior art keywords
- metal
- carbon fiber
- fiber reinforced
- reinforced aluminum
- powder
- 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.)
- Granted
Links
Images
Landscapes
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
The invention discloses a method for connecting a carbon fiber reinforced aluminum-based composite with a metal, relating to a method for connecting the composite with the metal. The invention solves the problem of serious interface reaction between reinforced phase carbon fibers and aluminum and degraded property of a base material due to high integral heating temperature of the traditional welding method. The method comprises the steps of: firstly, weighing aluminum powder, mixing with copper oxide powder, ball-grinding to obtain mixed powder; secondly, making the mixed powder into an intermediate layer with a relative density being 60 percent to 80 percent and a thickness being 1-3mm, storing in a sealing manner; and thirdly, placing the intermediate layer between the carbon fiber reinforced aluminum-based composite and the metal for assembling a sandwich, heating to 500 DEG C under the condition of the pressure being 5MPa, preserving the temperature for 5-10min, and furnace-cooling to room temperature. The invention can realize the connection of the carbon fiber reinforced aluminum-based composite with the metal at a temperature of 500 DEG C, and is applied to the field of connecting the aluminum-based composite with the metal. The joint strength can reach 50.7MPa.
Description
Technical field
The present invention relates to the method for a kind of composite and metal.
Background technology
Aluminum matrix composite has high specific strength, specific stiffness, axial tensile strength and wearability; Outstanding high temperature resistance and low thermal coefficient of expansion; Favorable conductive, thermal conductivity, fatigue resistance; And under humidity or radiation environment good advantages such as dimensional stability, be a kind of desirable light-weight high-strength material.Carbon fiber reinforced aluminum matrix composite density is less than aluminium alloy, and modulus is but high 2 ~ 4 times than aluminium alloy, and its tensile strength still can keep 81% of room temperature tensile strength in the time of 250 ℃, and its fatigue ratio aluminium alloy is high by 38%.The member of processing has light weight, good rigidly, small wall thickness, advantages of higher stability, can improve place capacity and delivered payload capability greatly.With the satellite parabola antenna skeleton that carbon fiber reinforced aluminum matrix composite is processed, thermal coefficient of expansion is low, thermal conductivity good, can in than large-temperature range, keep its dimensionally stable, makes the gain efficiency of satellite parabola antenna improve 4 times.DWA company uses the graphite fibre reinforced aluminum matrix composites to be the waveguide on NASA and the Lockheed manufactured satellite.Not only axial rigidity is high, the coefficient of expansion is low for the waveguide of processing with this material, conduct electricity very well, and lighter by 30% with the compounded waveguide of graphite/epoxy one aluminium lamination than former.Along with the quickening of C/Al composite engineering progress of application, material self and and other material between connectivity problem become more and more important.
Fiber-reinforced metal matrix composite is made up of parent metal and fortifying fibre; The difficult point of welding this composite is; Under higher temperature, thermodynamic instability normally between matrix in the metal-base composites and the fortifying fibre is prone to take place chemical reaction on both contact interfaces; Generation is to the disadvantageous fragility phase of material property, and this reaction is commonly referred to interfacial reaction.The solubility of carbon in solid-state and liquid aluminium is all little, and solid solubility is 0.015%; And the solubility when 800 ℃, 1000 ℃, 1100 ℃ and 1200 ℃ is respectively 0.1%, 0.14%, 016% and 0.32%.In the temperature range of room temperature to 1670 ℃, Al and C reaction generate Al
4C
3Standard free energy of formation all be negative value.Therefore, aluminium and carbon are inconsistent on thermodynamics, and they have begun reaction at low temperatures, and just speed is very slow, along with the rising of temperature, reacts more and more violent, the Al of generation
4C
3Amount is also more and more.The temperature that both obviously have an effect is different and different according to matrix composition and carbon fiber structural, between 400 ℃～500 ℃.The welding method of welding temperature on this scope all can cause tangible interfacial reaction.Al
4C
3Be fragility acicular constituent, the boundary strength between matrix and the fortifying fibre acutely descended, the performance of severe exacerbation mother metal.At present, mainly concentrate on the research of methods such as arc welding, soldering and diffusion welding (DW), yet arc welding can cause the serious interfacial reaction of wild phase and matrix generation because bath temperature is higher, heating surface (area) (HS is bigger for the connection of fiber reinforcement aluminum matrix composite; Diffusion welding (DW) can cause the large tracts of land of interfacial reaction to take place because the connection temperature is high, heat time heating time is long too; Though the solder in the soldering can realize the connection of fiber reinforcement aluminum matrix composite, the joint of soft solder welding is highly brittle, and just possibly rupture in the cooling procedure.The present invention proposes a kind of method of attachment that can realize carbon fiber reinforced aluminum matrix composite and metal, and quality of connection is higher, makes carbon fiber reinforced aluminum matrix composite and intermetallic reach good metallurgical binding, also can not worsen the performance of mother metal simultaneously.
Summary of the invention
The objective of the invention is in order to solve the whole heating-up temperature of traditional welding method high; Cause taking place between wild phase carbon fiber and the aluminium serious interfacial reaction; Worsen the problem of mother metal performance, and a kind of method that connects carbon fiber reinforced aluminum matrix composite and metal is provided.
A kind of method that connects carbon fiber reinforced aluminum matrix composite and metal of the present invention is carried out according to the following steps: one, by weight 54 ~ 58 parts aluminium powder, 8 ~ 10 parts nickel powder and 33 ~ 37 parts cupric oxide powder are mixed; Place in the ball grinder; In ball material mass ratio is that the ratio of 5:1 is put into abrading-ball; Under the condition of argon shield, the speed ball milling 2 ~ 3h with 300 ~ 500r/min obtains mixed-powder; Two, the mixed-powder that step 1 is obtained be pressed into relative density be 60% ~ 80% and thickness be the intermediate layer pressed compact of 1 ~ 3mm, sealing is preserved; Three, the intermediate layer pressed compact that step 2 is obtained places and is assembled into " sandwich " formula assembly parts between carbon fiber reinforced aluminum matrix composite and the metal; Then assembly parts are clipped and be put in the vacuum drying oven; At pressure is under the condition of 5MPa, is heated to 500 ℃, and is incubated 5 ~ 10min; Cool to room temperature then with the furnace, promptly accomplish being connected of carbon fiber reinforced aluminum matrix composite and metal.
Advantage of the present invention: one, the present invention utilizes traditional aluminothermy projection principle; Prepared Al-Ni-CuO powder heat release intermediate layer; Can realize being connected of carbon fiber reinforced aluminum matrix composite and metal at 500 ℃; Simultaneously can not worsen performance of composites, well keep the various good characteristics of mother metal.Two, utilize intermediate layer of the present invention to carry out being connected of carbon fiber reinforced aluminum matrix composite and metal, intermediate layer and both sides mother metal reach good metallurgical binding, and quality of connection is good, and strength of joint can reach 50.7MPa.The invention provides a kind of quality of connection preferably, can realize the method that carbon fiber reinforced aluminum matrix composite is connected with metal, can not worsen simultaneously the performance of mother metal.
Adopt homemade powder intermediate layer among the present invention, form by certain weight proportion, be pressed into the thick cylinder of 1 ~ 2mm by Ni powder, Al powder, CuO powder; Be placed between C/Al composite and the metal, be assembled into " sandwich " formula structure, put into vacuum drying oven and heat; Apply certain pressure simultaneously; Be heated to certain temperature, and insulation a period of time, realize connecting the connection of the two.The present invention utilizes Al powder and Ni, the reaction of CuO powder in the homemade powder intermediate layer to emit a large amount of heat, makes the aluminium fusing in the intermediate layer, and local melting the C/Al composite and the metal that contacts with the intermediate layer, makes the two that metallurgical binding take place, the realization connection.Traditional method of attachment because whole heating-up temperature all will reach the fusing point of aluminium, has therefore unavoidably destroyed C
f/ Al meets the combination property of material.The present invention has then utilized Al and CuO under lower temperature (500 ℃ condition can be reacted); And supervening great amount of heat, Al and Ni also can instead give birth to reaction at (about 600 ℃) under the lower temperature simultaneously, and emit great amount of heat; Well be connected with the both sides mother metal; Adopt this powder of configuration voluntarily, well reduced heating-up temperature in the whole stove, reach good connection effect.And about 500 ℃, the interfacial reaction of C and Al is fainter, can not influence the C/Al performance of composites, has well kept the various good characteristics of mother metal.
Description of drawings
Fig. 1 is for connecting the weld seam macro morphology figure of carbon fiber reinforced aluminum matrix composite and TiAl; Wherein, the left side is a carbon fiber reinforced aluminum matrix composite among the figure, and the centre is reacted intermediate layer, and the right side is the TiAl alloy;
Fig. 2 is carbon fiber reinforced aluminum matrix composite and TiAl alloy assembling sketch map; Wherein, 1 is carbon fiber reinforced aluminum matrix composite, and 2 is the intermediate layer pressed compact, and 3 is the TiAl alloy;
Fig. 3 is a carbon fiber reinforced aluminum matrix composite and shear strength testing experiment sketch map after the TiAl alloy is connected; Wherein, 1 is carbon fiber reinforced aluminum matrix composite, and 2 is the intermediate layer, and 3 is the TiAl alloy, and 4 is jig.
The specific embodiment
Technical scheme of the present invention is not limited to the following cited specific embodiment, also comprises the combination in any between each specific embodiment.
The specific embodiment one: a kind of method that connects carbon fiber reinforced aluminum matrix composite and metal of this embodiment is carried out according to the following steps: one, by weight 54 ~ 58 parts aluminium powder, 8 ~ 10 parts nickel powder and 33 ~ 37 parts cupric oxide powder are mixed; Place in the ball grinder; In ball material mass ratio is that the ratio of 5:1 is put into abrading-ball; Under the condition of argon shield, the speed ball milling 2 ~ 3h with 300 ~ 500r/min obtains mixed-powder; Two, the mixed-powder that step 1 is obtained be pressed into relative density be 60% ~ 80% and thickness be the intermediate layer pressed compact of 1 ~ 3mm, sealing is preserved; Three, the intermediate layer pressed compact that step 2 is obtained places and is assembled into " sandwich " formula assembly parts between carbon fiber reinforced aluminum matrix composite and the metal; Then assembly parts are clipped and be put in the vacuum drying oven; At pressure is under the condition of 5MPa, is heated to 500 ℃, and is incubated 5 ~ 10min; Cool to room temperature then with the furnace, promptly accomplish being connected of carbon fiber reinforced aluminum matrix composite and metal.
The advantage of this embodiment: one, this embodiment utilizes traditional aluminothermy projection principle; Prepared Al-Ni-CuO powder heat release intermediate layer; Can realize being connected of carbon fiber reinforced aluminum matrix composite and metal at 500 ℃; Simultaneously can not worsen performance of composites, well keep the various good characteristics of mother metal.Two, utilize the intermediate layer of this embodiment to carry out being connected of carbon fiber reinforced aluminum matrix composite and metal, intermediate layer and both sides mother metal reach good metallurgical binding, and quality of connection is good, and strength of joint can reach 50.7MPa.This embodiment provide a kind of quality of connection preferably, can realize the method that carbon fiber reinforced aluminum matrix composite is connected with metal, can not worsen simultaneously the performance of mother metal.
The specific embodiment two: what this embodiment and the specific embodiment one were different is: the described aluminium powder of step 1 is 325 ~ 1000 orders, and nickel powder is 325 ~ 1000 orders, and cupric oxide powder is 325 ~ 1000 orders.Other is identical with the specific embodiment one.
The specific embodiment three: what this embodiment and the specific embodiment one to two were different is: the described relative density of step 2 is the relative density that records at 20 ℃.Other is identical with the specific embodiment one to two.
The specific embodiment four: what this embodiment was different with one of specific embodiment one to three is: the described metal of step 3 is the TiAl alloy.Other is identical with one of specific embodiment one to three.
Through following verification experimental verification effect of the present invention:
A kind of method that connects carbon fiber reinforced aluminum matrix composite and metal of this test is carried out according to the following steps: one, take by weighing the aluminium powder of 5.6g, the nickel powder of 0.9g and the cupric oxide powder of 3.5g and mix; Place in the ball grinder; Put into abrading-ball in ball material mass ratio for the 5:1 ratio; Under the condition of argon shield,, obtain mixed-powder with 300r/min speed ball milling 2.5h; Two, the mixed-powder that step 1 is obtained be pressed into relative density be 70% and thickness be the intermediate layer of 1mm, sealing is preserved then; Three, the intermediate layer that step 2 is obtained places between carbon fiber reinforced aluminum matrix composite (buying from Materials Academy special material research institute of Harbin Institute of Technology) and the TiAl alloy and is assembled into " sandwich " formula assembly parts (sketch map is as shown in Figure 2); Then assembly parts are clipped and be put in the vacuum drying oven; At pressure is under the condition of 5MPa, is heated to 500 ℃, and insulation 10min; Cool to room temperature then with the furnace, promptly accomplish being connected of carbon fiber reinforced aluminum matrix composite and TiAl alloy.
The carbon fiber reinforced aluminum matrix composite of this test is C
f/ Al composite is bought from Materials Academy special material research institute of Harbin Institute of Technology.
The relative density of this test is meant the relative density of intermediate layer pressed compact, under 20 ℃, records.
Material after this test connection is carried out back scattering observe under SEM, the result is as shown in Figure 1, can be known by Fig. 1, and intermediate layer and both sides mother metal reach good metallurgical binding, does not have obvious defects to generate, and has formed complete joint.The shear strength test is carried out in butt joint, and the testing experiment sketch map is as shown in Figure 3, and the shearing strength of joint can arrive 30.07MPa, reaches strength of parent volume 61.4%.
Claims (4)
1. method that connects carbon fiber reinforced aluminum matrix composite and metal; It is characterized in that the method that connects carbon fiber reinforced aluminum matrix composite and metal carries out according to the following steps: one, by weight 54 ~ 58 parts aluminium powder, 8 ~ 10 parts nickel powder and 33 ~ 37 parts cupric oxide powder are mixed; Placing in the ball grinder, is that the ratio of 5:1 is put into abrading-ball in ball material mass ratio, under the condition of argon shield; Speed ball milling 2 ~ 3h with 300 ~ 500r/min obtains mixed-powder; Two, the mixed-powder that step 1 is obtained be pressed into relative density be 60% ~ 80% and thickness be the intermediate layer pressed compact of 1 ~ 3mm, sealing is preserved; Three, the intermediate layer pressed compact that step 2 is obtained places and is assembled into " sandwich " formula assembly parts between carbon fiber reinforced aluminum matrix composite and the metal; Then assembly parts are clipped and be put in the vacuum drying oven; At pressure is under the condition of 5MPa, is heated to 500 ℃, and is incubated 5 ~ 10min; Cool to room temperature then with the furnace, promptly accomplish being connected of carbon fiber reinforced aluminum matrix composite and metal.
2. a kind of method that connects carbon fiber reinforced aluminum matrix composite and metal according to claim 1 is characterized in that the described aluminium powder of step 1 is 325 ~ 1000 orders, and nickel powder is 325 ~ 1000 orders, and cupric oxide powder is 325 ~ 1000 orders.
3. a kind of method that connects carbon fiber reinforced aluminum matrix composite and metal according to claim 1 is characterized in that the described relative density of step 2 is the relative density that records at 20 ℃.
4. a kind of method that connects carbon fiber reinforced aluminum matrix composite and metal according to claim 1 is characterized in that the described metal of step 3 is the TiAl alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210185530 CN102658368B (en) | 2012-06-07 | 2012-06-07 | Method for connecting carbon fiber reinforced aluminum-based composite with metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210185530 CN102658368B (en) | 2012-06-07 | 2012-06-07 | Method for connecting carbon fiber reinforced aluminum-based composite with metal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102658368A true CN102658368A (en) | 2012-09-12 |
| CN102658368B CN102658368B (en) | 2013-09-25 |
Family
ID=46768022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210185530 Expired - Fee Related CN102658368B (en) | 2012-06-07 | 2012-06-07 | Method for connecting carbon fiber reinforced aluminum-based composite with metal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102658368B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108339987A (en) * | 2018-03-01 | 2018-07-31 | 常熟理工学院 | The connection method of carbon fibre composite and magnesium alloy materials |
| CN110843285A (en) * | 2019-10-24 | 2020-02-28 | 苏州普热斯勒先进成型技术有限公司 | Carbon fiber composite structural member with multilayer structure and preparation method thereof |
| CN114346616A (en) * | 2022-01-17 | 2022-04-15 | 哈焊国创(青岛)焊接工程创新中心有限公司 | Light alloy and fiber reinforced composite material heterojunction and preparation method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04165007A (en) * | 1990-10-29 | 1992-06-10 | Kinya Miyashita | Manufacture of ceramic/metallic composite requiring high strength |
| JPH06192818A (en) * | 1992-12-25 | 1994-07-12 | Mitsubishi Heavy Ind Ltd | Sic fiber reinforced ti-al composite material |
| CN101143397A (en) * | 2007-11-06 | 2008-03-19 | 北京有色金属研究总院 | C/C and C/SiC composite material and metal connecting method |
| CN101176946A (en) * | 2007-11-28 | 2008-05-14 | 哈尔滨工业大学 | Method for vacuum scattering intermetallic compound for coupling TiAL |
| CN101412167A (en) * | 2008-11-28 | 2009-04-22 | 中国电力科学研究院 | Thermofusion welding agent for welding copper covered steel grounded screen |
| US20110127314A1 (en) * | 2009-11-30 | 2011-06-02 | Infineon Technologies Ag | Bonding material with exothermically reactive heterostructures |
| CN102267024A (en) * | 2011-07-06 | 2011-12-07 | 哈尔滨工业大学 | Solder for exothermic welding of grounding body in grounding system and ignition agent of solder |
-
2012
- 2012-06-07 CN CN 201210185530 patent/CN102658368B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04165007A (en) * | 1990-10-29 | 1992-06-10 | Kinya Miyashita | Manufacture of ceramic/metallic composite requiring high strength |
| JPH06192818A (en) * | 1992-12-25 | 1994-07-12 | Mitsubishi Heavy Ind Ltd | Sic fiber reinforced ti-al composite material |
| CN101143397A (en) * | 2007-11-06 | 2008-03-19 | 北京有色金属研究总院 | C/C and C/SiC composite material and metal connecting method |
| CN101176946A (en) * | 2007-11-28 | 2008-05-14 | 哈尔滨工业大学 | Method for vacuum scattering intermetallic compound for coupling TiAL |
| CN101412167A (en) * | 2008-11-28 | 2009-04-22 | 中国电力科学研究院 | Thermofusion welding agent for welding copper covered steel grounded screen |
| US20110127314A1 (en) * | 2009-11-30 | 2011-06-02 | Infineon Technologies Ag | Bonding material with exothermically reactive heterostructures |
| CN102267024A (en) * | 2011-07-06 | 2011-12-07 | 哈尔滨工业大学 | Solder for exothermic welding of grounding body in grounding system and ignition agent of solder |
Non-Patent Citations (3)
| Title |
|---|
| 何鹏等: "TiAl金属间化合物及其连接技术的研究进展", 《焊接学报》, vol. 23, no. 05, 31 October 2002 (2002-10-31), pages 91 - 96 * |
| 冯吉才等: "铝硅合金钎焊C_f/Al复合材料的界面反应及连接机理", 《中国有色金属学报》, vol. 15, no. 11, 30 November 2005 (2005-11-30), pages 1710 - 1716 * |
| 杨志波等: "Ti-Al-CuO体系热压反应合成TiAl基复合材料", 《材料热处理学报》, vol. 31, no. 02, 28 February 2010 (2010-02-28), pages 10 - 14 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108339987A (en) * | 2018-03-01 | 2018-07-31 | 常熟理工学院 | The connection method of carbon fibre composite and magnesium alloy materials |
| CN110843285A (en) * | 2019-10-24 | 2020-02-28 | 苏州普热斯勒先进成型技术有限公司 | Carbon fiber composite structural member with multilayer structure and preparation method thereof |
| CN110843285B (en) * | 2019-10-24 | 2022-06-17 | 苏州普热斯勒先进成型技术有限公司 | Carbon fiber composite structural member with multilayer structure and preparation method thereof |
| CN114346616A (en) * | 2022-01-17 | 2022-04-15 | 哈焊国创(青岛)焊接工程创新中心有限公司 | Light alloy and fiber reinforced composite material heterojunction and preparation method thereof |
| CN114346616B (en) * | 2022-01-17 | 2023-03-17 | 哈焊国创(青岛)焊接工程创新中心有限公司 | Light alloy and fiber reinforced composite material heterojunction and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102658368B (en) | 2013-09-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102689096A (en) | Method for laser-induced self-propagating connection between carbon fiber reinforced aluminum-based composite and metal | |
| CN102554449B (en) | Method for connecting carbon fiber-reinforced aluminum-based composite material and metal | |
| CN102489805B (en) | in-situ reinforced active liquid-phase diffusion welding method of aluminium base composite and three-element active solder of Al-Cu-Ti system | |
| CN103600169B (en) | Method for connecting Cf/Al composite with TiAl based on laser ignition and self-propagating reaction | |
| CN103586582B (en) | A kind of laser-induced combustion self-propagating reaction assistant brazing connects C fthe method of/Al composite and TiAl | |
| CN101890590A (en) | Composite soldering material for soldering titanium alloy and ceramic or ceramic matrix composition material and method for soldering by using same | |
| CN101298108B (en) | Technique for vacuum brazing titanium alloy and steel | |
| CN102350553B (en) | Welding method of high-volume-content ceramic reinforced Al-base composite material | |
| CN104439590B (en) | A kind of 6061 aluminium alloys and the soldering processes of AZ31B magnesium alloy | |
| CN102145420A (en) | Laser penetration brazing method for dissimilar alloy | |
| CN105499833A (en) | High-temperature brazing material for brazing tungsten-copper alloy and copper or copper alloy and brazing method of high-temperature brazing material | |
| CN102658368B (en) | Method for connecting carbon fiber reinforced aluminum-based composite with metal | |
| CN101745793A (en) | Method for producing irregular-section composite pipe | |
| CN105834540A (en) | Method for brazing TZM alloy by means of Ti-Ni high-temperature brazing filler metal | |
| CN106695043A (en) | Carbon base material and copper brazing connection method | |
| CN102275022A (en) | Connecting method of C/C composite material and copper or copper alloy | |
| CN104772578B (en) | A kind of solder for including titanium zirconium cupro-nickel | |
| CN102205359B (en) | Method for manufacturing foamed aluminum board | |
| CN109465564A (en) | The zinc-aluminium medicine core solder that a kind of soldering strength is high, corrosion resistance is strong | |
| CN105798449A (en) | Method for diffusion connection of high-niobium TiAl alloy by using composite metal foil | |
| CN112959012A (en) | Preparation method of foamed aluminum sandwich plate based on friction stir welding connection | |
| CN105965176B (en) | For soldering tungsten-copper alloy and the Ni base chilling solders and soldering processes of stainless steel | |
| CN105127534A (en) | Brazing connecting method for tungsten-based powder alloy die | |
| CN102922172A (en) | Titanium-zirconium-ferrum based solder for TiAl or Ti3Al alloy soldering | |
| CN110899698B (en) | Method for forming empennage to carry engine shell by adopting scandium-aluminum alloy and product |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130925 Termination date: 20140607 |
|
| EXPY | Termination of patent right or utility model |