CN103586582A - Method for connecting Cf/Al composite materials and TiAl through laser ignition self-propagating reaction auxiliary brazing - Google Patents
Method for connecting Cf/Al composite materials and TiAl through laser ignition self-propagating reaction auxiliary brazing Download PDFInfo
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- CN103586582A CN103586582A CN201310624909.XA CN201310624909A CN103586582A CN 103586582 A CN103586582 A CN 103586582A CN 201310624909 A CN201310624909 A CN 201310624909A CN 103586582 A CN103586582 A CN 103586582A
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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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/19—Soldering, e.g. brazing, or unsoldering taking account of the properties of the materials to be soldered
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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
- 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
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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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/10—Aluminium or alloys thereof
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Abstract
The invention relates to a method for connecting Cf/Al composite materials and TiAl, in particular to a method for connecting Cf/Al composite materials and TiAl through laser ignition self-propagating reaction auxiliary brazing. The method aims to solve the problems that in a conventional welding method, due to the fact that heating temperature is too high and pressure is too large, carbon fibers and an aluminum substrate in the Cf/Al composite materials generate a serious interfacial reaction, interfacial combination is damaged, and the performance of base metal is weakened. The method comprises the steps that 1, nickel powder/aluminum powder mixed powder is prepared; 2, a middle-layer compact is prepared; 3, surface pretreatment is carried out; 4, laser ignition is carried out. The laser ignition is used for igniting the middle layer, complete reaction is carried out on the middle layer, and even products are formed. Brazing filler metal is heated and melted, the clearance of the middle layer is filled, and connector density is improved. The base metal on the two sides, the middle layer and the brazing filler metal form metallurgical bonding, a connector good in performance can be obtained, and the strength can reach more than 40.5Mpa. The method can be used for connecting the Cf/Al composite materials and the TiAl.
Description
Technical field
The present invention relates to a kind of connection C
fthe method of/Al composite and TiAl.
Background technology
Carbon fiber reinforced aluminum matrix composite (is abbreviated as C
f/ Al composite) continuous carbon fiber and aluminum substrate, consisting of, is a kind of new structural material with broad prospect of application.C
f/ Al composite has possessed the advantage of carbon fiber light weight, and density is lower compared with aluminium alloy, but elastic modelling quantity and hot strength are common aluminum alloy 2～4 times, therefore has higher specific stiffness, specific strength.While is due to the humidification of continuous carbon fibre, C
f/ Al composite has higher axial tensile strength and wearability, low thermal coefficient of expansion, and good conductive and heat-conductive and anti-fatigue performance especially can keep good dimensional stability under moist and radiation environment.In addition, C
f/ Al composite also has certain applied at elevated temperature performance, in the time of 400 ℃, still can reach the performance that approaches room temperature.Use C
fthe member light weight that/Al composite is made, high-strength, dimensionally stable, can be on active service at a certain temperature, be higher aerospace material.At present successfully for making the fuselage ring of space shuttle and the rectangle antenna holder of Hubble Telescope etc.Meanwhile, Japan adopts C
f/ Al composite is made the Shinkansen electric motor car brake disc, and quality is only 29kg, for bullet train lightweight contributes.Along with C
fthe range of application of/Al composite expands, and will inevitably relate to the connectivity problem with other storeroom.
C
fin/Al composite, between carbon fiber and aluminum substrate, there is interfacial reaction 4Al+3C=Al
4c
3, belonging to reactive interfacial, its welding difficulty is the temperature selection that interfacial reaction causes.According to calculation of thermodynamics, C and Al Gibbs free energy is at normal temperatures negative value, therefore in thermodynamic instability state.At normal temperatures, Al and C just can react and generate Al
4c
3, but because temperature is lower, react very slow, be difficult to observe.Along with the rising of temperature, the reaction rate between Al and C increases gradually, reacts more and more violent, the Al of generation
4c
3amount also increase gradually.Al
4c
3be a kind of fragility phase, between carbon fiber and aluminum substrate, generate a small amount of Al
4c
3play link enhancement body and matrix, can promote the humidification of carbon fiber to matrix.But excessive fragility Al
4c
3generation unfavorable to composite itself, can the serious performance that reduces material self.According to correlative study, show, the temperature threshold value that obvious effect occurs for Al and C is about 500 ℃, therefore, should be noted that the selection of welding temperature while welding this type of material.Conventional fusion welding method is because bath temperature is high, and the reasons such as heat time length can cause serious interfacial reaction, generate frangible compounds in weld seam; Though soldering can form jointing, be limited to the scope of heating-up temperature, low melting point solder makes joint fragility larger; The pressure that diffusion welding (DW) is larger and the physical action of friction welding (FW) can destroy the connection of carbon fiber and matrix again; Commonly from spreading, connect to adopt overall heating means, because intermediate layer ignition temperature has to improve heating-up temperature compared with high, destroy composite property, and intermediate layer reaction not exclusively, causes joint performance unstable.Therefore, C
fthe connection of/Al composite is a relatively stubborn problem.
Summary of the invention
The present invention will solve normal welding method because the problems such as heating-up temperature is too high, pressure is excessive cause C
fin/Al composite, between carbon fiber and aluminum substrate, there is serious interfacial reaction, interface in conjunction with being damaged, worsening the problem of mother metal performance, and provide a kind of laser-induced combustion self-propagating reaction assistant brazing to connect C
fthe method of/Al composite and TiAl.
A kind of laser-induced combustion self-propagating reaction assistant brazing connects C
fthe method of/Al composite and TiAl specifically completes according to the following steps:
One, prepare nickel powder/aluminium powder mixed-powder: weigh by weight 45 parts～55 parts nickel powders and 45 parts～55 parts aluminium powders mix, then be placed in ball grinder, in ball material mass ratio, be (5～10): 1 ratio is put into abrading-ball, under the condition of argon shield, speed ball milling 2h～3h with 300r/min～500r/min, obtains nickel powder/aluminium powder mixed-powder;
Two, preparation intermediate layer pressed compact: it is 60%～80% and the thickness intermediate layer pressed compact that is 1mm～2mm that nickel powder/aluminium powder mixed-powder that step 1 is obtained is pressed into relative density, and sealing is preserved;
Three, surface preparation: by C
f/ Al composite material surface and TiAl surface are used respectively #200 sand paper, #400 sand paper, #600 sand paper and #800 sand paper successively to polish to C
f/ Al composite material surface and TiAl smooth surface are smooth, the C after being polished
ftiAl after/Al composite and polishing, then by the C after polishing
fthe AgCuTi solder paillon foil that TiAl after/Al composite, polishing and thickness are 50 μ m～100 μ m is put into acetone ultrasonic cleaning 5min～10min, and after taking out, electricity consumption dries up, and obtains pretreated C
f/ Al composite, pretreated TiAl and pretreated thickness are the AgCuTi solder paillon foil of 50 μ m～100 μ m;
Four, laser-induced combustion: the pretreated C that step 3 is obtained
fthe pretreated thickness that/Al composite, step 3 obtain is that the pretreated TiAl that obtains of the AgCuTi solder paillon foil of 50 μ m～100 μ m, intermediate layer pressed compact that step 2 obtains and step 3 is stacked successively, then at pressure, be that 2MPa～3MPa aims at intermediate layer pressed compact by the hot spot of laser, ignite, after igniting in intermediate layer, close immediately laser instrument, utilize intermediate layer self liberated heat, complete C
f/ Al composite is connected with TiAl's.
Advantage of the present invention: one, the present invention, with respect to traditional method for welding, does not need whole heating, and with completing after the self-propagating reaction of laser-induced combustion intermediate layer, joint efficiency is higher at normal temperatures.Two, heat affected area of the present invention is less, is a kind of local heat method, and both sides mother metal local melting, can not affect C
fthe performance of/Al composite, has well kept the various good characteristics of mother metal.Three, the present invention adopts laser-induced combustion intermediate layer, and intermediate layer complete reaction forms even product; Solder melted by heat, fills intermediate porosity layer, can improve joint density; Both sides mother metal and intermediate layer, solder have formed good metallurgical binding, can obtain well behaved joint, more than intensity can reach 40.5MPa.
The present invention can be used for C
f/ Al composite is connected with TiAl's.
Accompanying drawing explanation
Fig. 1 is that the specific embodiment one laser-induced combustion self-propagating reaction assistant brazing connects C
fthe method schematic diagram of/Al composite and TiAl;
Fig. 2 is the C of test one
fthe SEM figure of/Al composite and TiAl joint, wherein in figure, left side is C
f/ Al composite, centre is intermediate layer pressed compact, right side is TiAl alloy.
The specific embodiment
The specific embodiment one: a kind of laser-induced combustion self-propagating reaction of present embodiment assistant brazing connects C
fthe method of/Al composite and TiAl, specifically completes according to the following steps:
One, prepare nickel powder/aluminium powder mixed-powder: weigh by weight 45 parts～55 parts nickel powders and 45 parts～55 parts aluminium powders mix, then be placed in ball grinder, in ball material mass ratio, be (5～10): 1 ratio is put into abrading-ball, under the condition of argon shield, speed ball milling 2h～3h with 300r/min～500r/min, obtains nickel powder/aluminium powder mixed-powder;
Two, preparation intermediate layer pressed compact: it is 60%～80% and the thickness intermediate layer pressed compact that is 1mm～2mm that nickel powder/aluminium powder mixed-powder that step 1 is obtained is pressed into relative density, and sealing is preserved;
Three, surface preparation: by C
f/ Al composite material surface and TiAl surface are used respectively #200 sand paper, #400 sand paper, #600 sand paper and #800 sand paper successively to polish to C
f/ Al composite material surface and TiAl smooth surface are smooth, the C after being polished
ftiAl after/Al composite and polishing, then by the C after polishing
fthe AgCuTi solder paillon foil that TiAl after/Al composite, polishing and thickness are 50 μ m～100 μ m is put into acetone ultrasonic cleaning 5min～10min, and after taking out, electricity consumption dries up, and obtains pretreated C
f/ Al composite, pretreated TiAl and pretreated thickness are the AgCuTi solder paillon foil of 50 μ m～100 μ m;
Four, laser-induced combustion: the pretreated C that step 3 is obtained
fthe pretreated thickness that/Al composite, step 3 obtain is that the pretreated TiAl that obtains of the AgCuTi solder paillon foil of 50 μ m～100 μ m, intermediate layer pressed compact that step 2 obtains and step 3 is stacked successively, then at pressure, be that 2MPa～3MPa aims at intermediate layer pressed compact by the hot spot of laser, ignite, after igniting in intermediate layer, close immediately laser instrument, utilize intermediate layer self liberated heat, complete C
f/ Al composite is connected with TiAl's.
Ball material mass ratio described in present embodiment step 1 is mill ball quality and the ratio of the gross mass of nickel powder and aluminium powder.
Fig. 1 is that the specific embodiment one laser-induced combustion self-propagating reaction assistant brazing connects C
fthe method schematic diagram of/Al composite and TiAl.
The method that present embodiment has proposed to adopt laser-induced combustion self-propagating reaction assistant brazing to connect realizes C
f/ Al composite is connected with TiAl's, utilizes intermediate layer self-propagating reaction liberated heat fusing high-melting-point solder, is guaranteeing C
funder the prerequisite that/Al composite property is not damaged, realize the good metallurgical binding of itself and TiAl, obtain the higher jointing of quality.
Intermediate layer burning heat release in present embodiment derives from the reaction Ni+Al=NiAl of Ni powder and Al powder, generates the single-phase NiAl of melting.According to calculation of thermodynamics, its adiabatic temperature reaches 1653 ℃, and mother metal that can local melting both sides forms liquid phase.But the NiAl fragility generating is larger, and hole is more, and dense structure's property is poor.Simultaneously due to C
fthe fusing point of/Al composite is lower, is about 660 ℃, and the high temperature of intermediate layer burning can make C
f/ Al composite one side melting range is excessive, makes joint distortion larger.Present embodiment is at C
fbetween/Al composite and Ni-Al intermediate layer, add AgCuTi solder paillon foil, high-melting-point, is about 800 ℃, with respect to C
f/ Al composite fusing point is higher, and the fusing of AgCuTi solder paillon foil absorbs heat, reduces C
f/ Al composite melting range.Simultaneously fusing AgCuTi solder can also and C
f/ Al composite forms metallurgical binding, and fills the hole in NiAl product, improves the density of tissue.
The advantage of present embodiment: one, present embodiment, with respect to traditional method for welding, does not need whole heating, and with completing after the self-propagating reaction of laser-induced combustion intermediate layer, joint efficiency is higher at normal temperatures.Two, the heat affected area of present embodiment is less, is a kind of local heat method, and both sides mother metal local melting, can not affect C
fthe performance of/Al composite, has well kept the various good characteristics of mother metal.Three, present embodiment adopts laser-induced combustion intermediate layer, and intermediate layer complete reaction, forms even product; Solder melted by heat, fills intermediate porosity layer, can improve joint density; Both sides mother metal and intermediate layer, solder have formed good metallurgical binding, can obtain well behaved joint, more than intensity can reach 40.5MPa.
Present embodiment can be used for C
f/ Al composite is connected with TiAl's.
The specific embodiment two: present embodiment is different from the specific embodiment one: order number >=200 order of the nickel powder described in step 1.Other is identical with the specific embodiment one.
The specific embodiment three: present embodiment is different from the specific embodiment one or two: order number >=325 order of the aluminium powder described in step 1.Other is identical with the specific embodiment one or two.
The specific embodiment four: present embodiment is different from one of specific embodiment one to three: weigh by weight 55 parts of nickel powders in step 1 and 45 parts of aluminium powders mix; then be placed in ball grinder; the ratio that is 5:1 in ball material mass ratio is put into abrading-ball; under the condition of argon shield; speed ball milling 2.5h～3h with 400r/min, obtains nickel powder/aluminium powder mixed-powder.Other is identical with one of specific embodiment one to three.
The specific embodiment five: present embodiment is different from one of specific embodiment one to four: weigh by weight 50 parts of nickel powders in step 1 and 50 parts of aluminium powders mix; then be placed in ball grinder; the ratio that is 5:1 in ball material mass ratio is put into abrading-ball; under the condition of argon shield; speed ball milling 2.5h～3h with 400r/min, obtains nickel powder/aluminium powder mixed-powder.Other is identical with one of specific embodiment one to four.
The specific embodiment six: present embodiment is different from one of specific embodiment one to five: weigh by weight 45 parts of nickel powders in step 1 and 55 parts of aluminium powders mix; then be placed in ball grinder; the ratio that is 5:1 in ball material mass ratio is put into abrading-ball; under the condition of argon shield; speed ball milling 2.5h～3h with 400r/min, obtains nickel powder/aluminium powder mixed-powder.Other is identical with one of specific embodiment one to five.
The specific embodiment seven: present embodiment is different from one of specific embodiment one to six: it is 65%～80% and the thickness intermediate layer pressed compact that is 1mm～2mm that the nickel powder/aluminium powder mixed-powder in step 2, step 1 being obtained is pressed into relative density, and sealing is preserved.Other is identical with one of specific embodiment one to six.
The specific embodiment eight: present embodiment is different from one of specific embodiment one to seven: described in step 2, compacting utilizes automanual hydraulic machine to carry out.Other is identical with one of specific embodiment one to seven.
Present embodiment is used semi-automatic liquid press, and adopting mixed-powder that pressure that axial compressive force is 500MPa～700MPa obtains step 1 to be pressed into relative density is 60%～80% and the thickness intermediate layer pressed compact that is 1mm～2mm.
The specific embodiment nine: present embodiment is different from one of specific embodiment one to eight: the pretreated C in step 4, step 3 being obtained
fthe pretreated thickness that/Al composite, step 3 obtain is that the pretreated TiAl that obtains of the AgCuTi solder paillon foil of 50 μ m～80 μ m, intermediate layer pressed compact that step 2 obtains and step 3 is stacked successively, then at pressure, be that 2.5MPa～3MPa aims at intermediate layer pressed compact by the hot spot of laser, ignite, after igniting in intermediate layer, close immediately laser instrument, utilize intermediate layer self liberated heat to make C
f/ Al composite is connected with TiAl's.Other is identical with one of specific embodiment one to eight.
Adopt following verification experimental verification effect of the present invention:
Test one: a kind of laser-induced combustion self-propagating reaction assistant brazing connects C
fthe method of/Al composite and TiAl specifically completes according to the following steps:
One, prepare nickel powder/aluminium powder mixed-powder: weigh by weight 55 parts of nickel powders and 45 parts of aluminium powders mix, then be placed in ball grinder, the ratio that is 5:1 in ball material mass ratio is put into abrading-ball, under the condition of argon shield, speed ball milling 3h with 400r/min, obtains nickel powder/aluminium powder mixed-powder;
Two, preparation intermediate layer pressed compact: it is 70% and the thickness intermediate layer pressed compact that is 1mm that nickel powder/aluminium powder mixed-powder that step 1 is obtained is pressed into relative density, and sealing is preserved;
Three, surface preparation: by C
f/ Al composite material surface and TiAl surface are used respectively #200 sand paper, #400 sand paper, #600 sand paper and #800 sand paper successively to polish to C
f/ Al composite material surface and TiAl smooth surface are smooth, the C after being polished
ftiAl after/Al composite and polishing, then by the C after polishing
fthe AgCuTi solder paillon foil that TiAl after/Al composite, polishing and thickness are 50 μ m is put into acetone ultrasonic cleaning 5min, and after taking out, electricity consumption dries up, and obtains pretreated C
f/ Al composite, pretreated TiAl and pretreated thickness are the AgCuTi solder paillon foil of 50 μ m;
Four, laser-induced combustion: the pretreated C that step 3 is obtained
fthe pretreated thickness that/Al composite, step 3 obtain is that the pretreated TiAl that obtains of the AgCuTi solder paillon foil of 50 μ m, intermediate layer pressed compact that step 2 obtains and step 3 is stacked successively, then at pressure, be that 2MPa aims at intermediate layer pressed compact by the hot spot of laser, ignite, after igniting in intermediate layer, close immediately laser instrument, utilize intermediate layer self liberated heat, complete C
f/ Al composite is connected with TiAl's.
The order number of the nickel powder described in this test procedure one is 200 orders; The order number of the aluminium powder described in step 1 is 325 orders.
Described in this test procedure two, compacting utilizes automanual hydraulic machine to carry out, concrete operations are for being used semi-automatic liquid press, and adopting nickel powder/aluminium powder mixed-powder that pressure that axial compressive force is 600MPa obtains step 1 to be pressed into relative density is 70% and the thickness intermediate layer pressed compact that is 1mm.
Ball material mass ratio described in this test procedure one is mill ball quality and the ratio of the gross mass of nickel powder and aluminium powder.
C in this test
fthe wild phase of/Al composite is diameter 5 μ m continuous carbon fibres, volume fraction 50%, and matrix is 6061 aluminium alloys; TiAl alloying component is Ti-48Al-7V-0.3Y (at.%); AgCuTi solder composition is Ag-26.4Cu-4.5Ti (wt.%).
Fig. 2 is the C of test one
fthe SEM figure of/Al composite and TiAl joint, wherein in figure, left side is C
f/ Al composite, centre is intermediate layer pressed compact, right side is TiAl alloy, as shown in Figure 2, intermediate layer and both sides mother metal have reached good metallurgical binding, and intermediate layer complete reaction and product are even, no significant defect in joint, quality of connection is good, adopts electronic universal tester Instron-5500R (1186) to carry out shearing test, and strength of joint can reach 40.5MPa.
Claims (9)
1. a laser-induced combustion self-propagating reaction assistant brazing connects C
fthe method of/Al composite and TiAl, is characterized in that a kind of laser-induced combustion self-propagating reaction assistant brazing connects C
fthe method of/Al composite and TiAl specifically completes according to the following steps:
One, prepare nickel powder/aluminium powder mixed-powder: weigh by weight 45 parts～55 parts nickel powders and 45 parts～55 parts aluminium powders mix, then be placed in ball grinder, in ball material mass ratio, be (5～10): 1 ratio is put into abrading-ball, under the condition of argon shield, speed ball milling 2h～3h with 300r/min～500r/min, obtains nickel powder/aluminium powder mixed-powder;
Two, preparation intermediate layer pressed compact: it is 60%～80% and the thickness intermediate layer pressed compact that is 1mm～2mm that nickel powder/aluminium powder mixed-powder that step 1 is obtained is pressed into relative density, and sealing is preserved;
Three, surface preparation: by C
f/ Al composite material surface and TiAl surface are used respectively #200 sand paper, #400 sand paper, #600 sand paper and #800 sand paper successively to polish to C
f/ Al composite material surface and TiAl smooth surface are smooth, the C after being polished
ftiAl after/Al composite and polishing, then by the C after polishing
fthe AgCuTi solder paillon foil that TiAl after/Al composite, polishing and thickness are 50 μ m～100 μ m is put into acetone ultrasonic cleaning 5min～10min, and after taking out, electricity consumption dries up, and obtains pretreated C
f/ Al composite, pretreated TiAl and pretreated thickness are the AgCuTi solder paillon foil of 50 μ m～100 μ m;
Four, laser-induced combustion: the pretreated C that step 3 is obtained
fthe pretreated thickness that/Al composite, step 3 obtain is that the pretreated TiAl that obtains of the AgCuTi solder paillon foil of 50 μ m～100 μ m, intermediate layer pressed compact that step 2 obtains and step 3 is stacked successively, then at pressure, be that 2MPa～3MPa aims at intermediate layer pressed compact by the hot spot of laser, ignite, after igniting in intermediate layer, close immediately laser instrument, utilize intermediate layer self liberated heat, complete C
f/ Al composite is connected with TiAl's.
2. a kind of laser-induced combustion self-propagating reaction assistant brazing according to claim 1 connects C
fthe method of/Al composite and TiAl, is characterized in that order number>=200 order of the nickel powder described in step 1.
3. a kind of laser-induced combustion self-propagating reaction assistant brazing according to claim 1 connects C
fthe method of/Al composite and TiAl, is characterized in that order number>=325 order of the aluminium powder described in step 1.
4. a kind of laser-induced combustion self-propagating reaction assistant brazing according to claim 1 connects C
fthe method of/Al composite and TiAl; it is characterized in that weighing by weight 55 parts of nickel powders in step 1 and 45 parts of aluminium powders mix; then be placed in ball grinder; the ratio that is 5:1 in ball material mass ratio is put into abrading-ball; under the condition of argon shield; speed ball milling 2.5h～3h with 400r/min, obtains nickel powder/aluminium powder mixed-powder.
5. a kind of laser-induced combustion self-propagating reaction assistant brazing according to claim 1 connects C
fthe method of/Al composite and TiAl; it is characterized in that weighing by weight 50 parts of nickel powders in step 1 and 50 parts of aluminium powders mix; then be placed in ball grinder; the ratio that is 5:1 in ball material mass ratio is put into abrading-ball; under the condition of argon shield; speed ball milling 2.5h～3h with 400r/min, obtains nickel powder/aluminium powder mixed-powder.
6. a kind of laser-induced combustion self-propagating reaction assistant brazing according to claim 1 connects C
fthe method of/Al composite and TiAl; it is characterized in that weighing by weight 45 parts of nickel powders in step 1 and 55 parts of aluminium powders mix; then be placed in ball grinder; the ratio that is 5:1 in ball material mass ratio is put into abrading-ball; under the condition of argon shield; speed ball milling 2.5h～3h with 400r/min, obtains nickel powder/aluminium powder mixed-powder.
7. a kind of laser-induced combustion self-propagating reaction assistant brazing according to claim 1 connects C
fthe method of/Al composite and TiAl, is characterized in that it is 65%～80% and the thickness intermediate layer pressed compact that is 1mm～2mm that the nickel powder/aluminium powder mixed-powder in step 2, step 1 being obtained is pressed into relative density, and sealing is preserved.
8. a kind of laser-induced combustion self-propagating reaction assistant brazing according to claim 1 connects C
fthe method of/Al composite and TiAl, is characterized in that compacting utilizes automanual hydraulic machine to carry out described in step 2.
9. a kind of laser-induced combustion self-propagating reaction assistant brazing according to claim 1 connects C
fthe method of/Al composite and TiAl, is characterized in that the pretreated C in step 4, step 3 being obtained
fthe pretreated thickness that/Al composite, step 3 obtain is that the pretreated TiAl that obtains of the AgCuTi solder paillon foil of 50 μ m～80 μ m, intermediate layer pressed compact that step 2 obtains and step 3 is stacked successively, then at pressure, be that 2.5MPa～3MPa aims at intermediate layer pressed compact by the hot spot of laser, ignite, after igniting in intermediate layer, close immediately laser instrument, utilize intermediate layer self liberated heat to make C
f/ Al composite is connected with TiAl's.
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| CN104759752A (en) * | 2015-04-28 | 2015-07-08 | 哈尔滨工业大学 | Method for welding TiAl alloy efficiently |
| CN105237791A (en) * | 2015-10-14 | 2016-01-13 | 哈尔滨工业大学 | Method for preparing cladding coating on surface of carbon fiber reinforced thermo plastic by laser-assisted self-propagation high-temperature synthesis (SHS) technology |
| 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 |
| CN109570745A (en) * | 2018-12-06 | 2019-04-05 | 北京工业大学 | A kind of ultrasonic wave auxiliary Nano composite granules green compact self- propagating containing energy connection metal and nonmetallic method |
| CN110587112A (en) * | 2019-09-12 | 2019-12-20 | 湖北工业大学 | Welding method between metal plates |
| CN112207424A (en) * | 2020-09-04 | 2021-01-12 | 上海交通大学 | Device and method for improving self-propagating reaction speed of energetic material |
| CN113894460A (en) * | 2021-04-19 | 2022-01-07 | 江苏博睿光电有限公司 | Self-propagating brazing film and preparation method thereof |
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