CN109158779A - It is a kind of for aluminium alloy/high nitrogen steel laser spot welding-vacuum brazing complex welding method - Google Patents
It is a kind of for aluminium alloy/high nitrogen steel laser spot welding-vacuum brazing complex welding method Download PDFInfo
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- CN109158779A CN109158779A CN201811196590.4A CN201811196590A CN109158779A CN 109158779 A CN109158779 A CN 109158779A CN 201811196590 A CN201811196590 A CN 201811196590A CN 109158779 A CN109158779 A CN 109158779A
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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
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/22—Spot 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
- B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
- B23K28/02—Combined welding or cutting procedures or apparatus
-
- 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
- B23K35/40—Making wire or rods for soldering or welding
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- Mechanical Engineering (AREA)
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- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Laser Beam Processing (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention discloses a kind of for aluminium alloy/high nitrogen steel laser spot welding-vacuum brazing complex welding method, surface preparation is carried out to aluminium alloy and high nitrogen steel position to be welded first, the fixed position to be welded of fixture, secondly spot welding is carried out to position to be welded using laser spot welding to fix, then prefabricated solder paste is coated in surface to be welded, finally remaining position to be welded in addition to laser spot welding position is attached using vacuum brazing.Steel base material of the present invention is almost non-fusible, so that nitrogen is not lost, overcomes the stomata disadvantage of prior welding mode, so that nitrogen almost free of losses；Steel base material is almost non-fusible in brazing process of the present invention, i.e., without deformation, effectively increases the bonding strength and mechanical property of connector, welding point molding is very good；Whole process of the present invention is implemented under gas shield environment, makes impurity element in welding process, ambient atmos that can not participate in reacting, thus the connector zero defect of acquisition, cleanliness are high, have excellent performance.
Description
Technical field
The present invention relates to a kind of for aluminium alloy/high nitrogen steel laser spot welding-vacuum brazing complex welding method, belongs to weldering
Connection technology field.
Background technique
Aluminum steel connection, is the difficulties in welding field since solid solubility between the two is low, thermophysical property difference is big
One of.Currently, aluminum steel connection method is roughly divided into three classes: one kind is Pressure Welding, mainly friction welding (FW), diffusion welding (DW), explosion weldering etc.,
This method is conducive to the welding of steel and aluminium and aluminium alloy, and connection surface must be thoroughly cleaned before weldering, eliminates oxide and film, but this
Class method is the disadvantage is that the shape of weldment is subject to certain restrictions, while joint has certain deformation；One kind is fusion welding, mainly
It is the methods of argon arc welding, carbon arc welding, electron beam welding；It must be in one layer of transition metal of steel surface plating, this metal using such methods
It must be well combined with aluminium, good connector could be obtained；There are also one kind: molten soldering, mainly laser welding-brazing, CMT melt pricker
Weldering, the molten soldering of laser TIG, the molten soldering of laser MIG, are melted using such methods aluminum mother plate, are then attached with steel base material, aluminium
Side belongs to melting welding, and steel side belongs to soldering, and workpiece aluminum side to be welded is deformed, and for precision workpiece, has a foregone conclusion
It is sex-limited, and since the fusing of base material aluminum side is more, for complex precise components (solder joint is more and small), base material is deformed
And damage, the defects of weld interface is easy to happen burn through, does not burn-on.In addition, soldering processes are individually used, such as furnace brazing,
Vacuum brazing, furnace brazing, aluminium, steel are non-fusible, are difficult to be directly realized by the company of Dissimilar Materials Aluminium by existing liquid solder
It connects, existing solder only can be individually brazed steel (iron-based solder, silver-base solder) currently on the market, or individually brazed aluminum (aluminium base
Solder), but it can not be brazed aluminum steel simultaneously, solder ingredient and soldering property have limitation.
Patent 2013101716866 is disclosed to be combined using addition alloy interlayer with cast setting, realizes aluminum steel xenogenesis
The cold metal transfer welding method (CMT) of material improves aluminum steel linkage interface using nickel cladding layer, improves strength of joint, but should
Method CMT welding machine is expensive, and the precision of nickel-base alloy column is not easy to control, influences the quality of connection and performance of aluminum steel connector.
Patent 201710697166 is disclosed to be combined using copper-based modified powder processing+laser treatment, realizes Dissimilar Materials Aluminium
Connection.The method for welding of aluminium material surface chromising disclosed in patent 2016109533176, although can be realized Dissimilar Materials Aluminium
Connection, but the intensity of connector is lower, not can guarantee the engineering actual operation requirements of aluminum steel connector.Therefore, at present still without
Good Dissimilar Materials Aluminium connection method.
The welding methods such as current existing soldering, Laser Welding, MIG weldering, submerged-arc welding are deposited in terms of Dissimilar Materials Aluminium connection
In certain limitation, urgent need develops the new welding method of one kind and solves the problems, such as this.
Summary of the invention
In view of the deficiencies of the prior art, that the object of the present invention is to provide a kind of no brazing flux burn into cleanliness is high, has excellent performance
Be used for aluminium alloy/high nitrogen steel laser spot welding-vacuum brazing complex welding method.
To achieve the goals above, the technical scheme adopted by the invention is that:
It is a kind of for aluminium alloy/high nitrogen steel laser spot welding-vacuum brazing complex welding method, first to aluminium alloy and height
Nitrogen steel position to be welded carries out surface preparation, secondly the fixed position to be welded of fixture carries out a little position to be welded using laser spot welding
Solid welding is fixed, and then prefabricated solder paste is coated in surface to be welded, finally using vacuum brazing to its in addition to laser spot welding position
Remaining position to be welded is attached.
Aluminium alloy is 7 line aluminium alloys；The nitrogen content of high nitrogen steel is more than 0.9wt%.
High nitrogen steel includes the raw material of following parts by weight: N:2.8~5.8 part, Fe:51~65 part, Cr:24~29 part, Mn:21
~26 parts, Mo:5.2~6.5 part, C:0.2~0.3 part, Si:0.3~0.5 part, Nb:0.2~0.35 part, Al:0.05~0.06
Part, S:0.02~0.05 part, P:0.05~0.08 part.
Process for surface preparation are as follows: aluminium alloy and high nitrogen steel position to be welded are successively mechanically polished, electrobrightening, wine
Essence is cleaned.
The technological parameter of laser spot welding are as follows: laser power: 400~500W；Spot welding total time: 120~180ms；Welding speed
Degree: 5~8mm/s；The focal length of lens:Light frequency out: 10~15Hz.
The operation of laser spot welding are as follows: in initial 0.5ms, make laser power rise to 100% total power from 0, then exist
Continue 8.5~9ms when 100% total power, laser spot welding work is completed within 100% total power duration, then in 0.4ms
Laser power is inside set to drop to 0 from 100% total power rapidly.
Solder paste the preparation method comprises the following steps:
(1) according to Pd:Ni:Cr:Mn: Ni-coated graphite alkene: Re:Si:B=25~28:39~46:36~39:12~15:
3.2~7.5:7~11:6~9:2~5.5 weight ratio weighs raw material, and is mixed to prepare alloy powder；
(2) 15~30 parts by weight of distilled water, 15~30 parts by weight of water based adhesive, 5~12 parts by weight of acetone, alcohol are weighed
6~12 parts by weight are mixed and stirred for uniformly；
(3) 45~70 parts by weight of alloy powder are weighed, the mixture of step (2) is added in 15~21 parts by weight of auxiliary additive
In, it stirs evenly, and vacuumize spare.
Ni-coated graphite alkene the preparation method comprises the following steps:
(1) graphene oxide is taken, it is successively roughened, is sensitized and is activated；
(2) graphene oxide after sensitized treatment is put into reducing agent and is restored, reduction stone is made after washing, drying
Black alkene, it is spare；
(3) nickel plating is carried out on reduced graphene surface using electrodeposition process, Ni-coated graphite alkene is made；The parameter of electrodeposition process
It is preferred that as follows: current density: 2.5~3.7A/dm2, temperature: 35~46 DEG C, pH value: 4.5~6.8, deposition liquid: nickel sulfate 61~
81g/L, 41~50g/L of nickel chloride, 28~36g/L of boric acid, 5.2~6.8g/L of dodecyl sodium sulfate, deposition rate: 1.3~
1.75 μm/min, sedimentation time: 180~365s；
(4) load is made in Ni-coated graphite alkene surface deposited metal molybdenum ion using direct current magnetron sputtering process has molybdenum ion
Ni-coated graphite alkene；The parameter of direct current magnetron sputtering process is preferably as follows: target is the weight ratio 3:7 nickel-molybdenum alloy of purity 99.99%
Target, substrate are glass slide, 0.8~0.95kV of voltage power, vacuum degree (0.8~1.3) × 10-4When Pa, it is passed through purity 99.99%
Argon gas as electric discharge and sputter gas, sputtering power: 110~140W, sedimentation time: 2~2.5min；
(5) there is the Ni-coated graphite alkene of molybdenum ion to be put into ball grinder load to clay into power, Ni-coated graphite alkene powder be made,
The partial size of powder is preferably 86~112 μm.
The preparation method of reduced graphene is referring to a kind of entitled " high-intensitive antibiotic dental containing modified graphene
Solder and preparation method thereof " (application number: patent application 2018103066691).
Water based adhesive is 24~36:45 of weight ratio~61:15~23:14~22:7~12 trbasic zinc phosphate, ammonium chloride, gathers
Ethylene glycol, Tisuacryl, high sodium sulphate mixture.
Auxiliary additive is 24~36:12 of weight ratio~18:84~126 barium glass powder, sodium tartrate, gas phase titanium dioxide
Silicon mixture.
Vacuum brazing method particularly includes:
(1) the entire workpiece for having been coated with prefabricated solder paste is put into vacuum chamber；
(2) vacuum degree of setting vacuum chamber unit, 10-6~10-4Pa；
(3) set temperature control unit is heated above 50~100 DEG C of solder paste fusion temperature, carry out heat preservation 45~
55s；
(4) after the completion of keeping the temperature, cool down, when workpiece is cooled to room temperature, vacuum chamber is opened, when intracavitary external pressure is identical
When, take out workpiece；
(5) weld seam is detected using infra-red inspection, if it find that there are existing defects in weld seam, using above-mentioned (1)-
(4) step carries out repair welding；If not occurring defect in weld seam, welding process terminates.
Compared with prior art, the present invention having following remarkable advantage:
1, the advantages of laser spot welding-vacuum brazing Combined Welding:
The present invention uses laser spot welding-vacuum brazing Combined Welding, overcomes the difficulty that fusion welding needs plating or plating metal
Point avoids the case where base material aluminium-steel deforms.(start, ending segment) fast, registration, nothing using laser spot welding speed of welding
Wlding is needed, aluminium and aluminium alloy are subjected to spot welding with steel and fixed, general 12~16 solder joints, it is only necessary to 8~11ms, weldquality beauty
It sees, zero defect occurs；Then solder paste is smeared in other points to be welded, is welded using vacuum brazing method, one side vacuum
Soldering is whole to heat to workpiece in furnace chamber, so that aluminium alloy/high nitrogen steel to be welded position homogeneous heating to be welded, in welding process not
The defects of generating residual stress, fire check, on the other hand, vacuum brazing are implemented in vacuum environment, liquid solder and aluminium alloy/height
When nitrogen steel connects, the defects of brazed seam interface is not likely to produce stomata, is mingled with, guarantees welding quality and performance.Meanwhile composite welding side
In method, laser is not contacted with the light beam of vacuum, heat radiation with aluminium, steel base material, solder, is heated, is being welded by light beam-heat radiation
In the process without applying pressure, base material is indeformable, not damaged；Aluminium alloy/high nitrogen steel is easy to produce high-temerature creep, phase at high temperature
Become etc., structure property will change, and reduce the performance of welding point, and aluminium closes during laser spot welding-vacuum composite welding
Gold/high nitrogen steel is non-fusible, can be to avoid above-mentioned structure property variation issue.
2, the advantages of solder paste
Pd: dissolving each other with elements such as nickel, silicon, rhenium, manganese, can form solid solution, improves the intensity resistant to high temperatures of solder and connector；It is
Connect aluminium alloy/high nitrogen steel dissimilar material steel side one of the chief elements；
Ni: improving solder wetting, improve soldering joint strength, corrosion resistance, and purification brazed seam crystal boundary improves solder processability
Can, it is one of connection aluminium alloy/most important element in high nitrogen steel dissimilar material steel side；
Cr: being infinitely dissolved with nickel, manganese, and solder and strength of joint, corrosion resistance can be improved, and is that connection aluminium alloy/high nitrogen steel is different
One of kind most important element in material steel side；
Mn: it reduces fusion temperature, improve solder wetting, there is secondary deoxidation；It is micro- hard that solder can be improved simultaneously
Degree and elevated temperature strength；
Re: rhenium adds seldom in solder, is rarely reported, and solder of the present invention adds rhenium element, improves the joint filling of solder
Ability and joint capacity；
Si: improving solder wetting, refines solder tissue, improves the intensity of solder and soldered fitting；It can be formed with aluminium
Eutectic, the mass fraction of eutectic point Si are 11.7%, are connection aluminium alloy/most important elements of high nitrogen steel dissimilar material aluminum side；
B: improving the plasticity of solder, enhances the spreadability and mobility of solder, is connection aluminium alloy/high nitrogen steel dissimilar material
One of most important element of aluminum side.
Ni-coated graphite alkene: joined the Ni-coated graphite alkene that area load has molybdenum ion, and one side graphene has excellent
The properties such as electricity, calorifics, mechanics, while density is low, structural stability is good, addition, which enters in solder, can be obviously improved solder
Wetability, thermal conductivity and soldering property, by nickel plating on the surface of graphene, not only prevent graphene in solder paste and liquid solder
It is indefinite to float, and makes the problem of oxide occur in solder ingredient unevenness and tissue, and be greatly enhanced and prepared composite soldering
Tensile strength, be much higher than other methods, on the other hand in Ni-coated graphite alkene area load molybdenum ion, when composite soldering is using
In the process, molybdenum ion is released slowly, since molybdenum ion is under extremely low concentration, it will be able to inhibit to nitrogenize in high nitrogen steel
The appearance and generation of the defects of object, carbide, improves the mechanical property of connector.
(1) steel base material of the present invention is almost non-fusible, so that nitrogen is not lost, the stomata for overcoming prior welding mode is lacked
Point, so that nitrogen almost free of losses；
(2) steel base material is almost non-fusible in brazing process of the present invention, i.e., without deformation, effectively increases the bonding strength of connector
And mechanical property, welding point molding are very good；
(3) laser of the present invention, vacuum radiation are not contacted with base material, solder, by radiant heating, are not necessarily in the welding process
Apply pressure；
(4) whole process of the present invention is implemented under vacuum conditions, join impurity element in welding process, ambient atmos can not
With react, thus the connector zero defect, the cleanliness that obtain are high, have excellent performance.
(5) laser spot welding of the present invention-vacuum brazing composite welding can effectively prevent when connecting steel since temperature is lower
Only joint generates nitride, carbide, carbonitride to reduce its performance；
(6) institute's welding steel base material is easy to produce high-temerature creep, phase transformation etc. at high temperature, and structure property will change, and reduces
The performance of welding point, steel is almost non-fusible during composite welding of the present invention, can change to avoid above-mentioned structure property and ask
Topic；
It (7), not only can be with effective wetting steel, Er Qieyu containing elements such as palladium, nickel, manganese, chromium in solder paste used in the present invention
The virtually limitless solid solution of base material forms metallurgical bonding, enhances the mechanical property of connector.
Specific embodiment
Specific embodiments of the present invention will be described in further detail with reference to embodiments.
Embodiment 1
A kind of 7005 aluminium alloys/high nitrogen steel (N:2.8 parts by weight, Fe:65 parts by weight, Cr:24 parts by weight, Mn:21 weight
Part, Mo:5.2 parts by weight, C:0.2 parts by weight, Si:0.3 parts by weight, Nb:0.2 parts by weight, Al:0.05 parts by weight, S:0.02 weight
Measure part, P:0.05 parts by weight) laser spot welding-vacuum brazing complex welding method, comprising the following steps:
(1) machine is successively carried out to 7005 aluminium alloy plates with a thickness of 1mm and with a thickness of the high nitrogen steel plate position to be welded of 1.5mm
Tool polishing, electrobrightening, alcohol are cleaned, and are then docked aluminium alloy and high nitrogen steel position to be welded, are fixed with fixture；
(2) it carries out spot welding to position to be welded using laser spot welding method to fix, laser spot welding technological parameter are as follows: laser function
Rate: 400W；Spot welding total time: 120ms；Speed of welding: 5mm/s；The focal length of lens:Light frequency out: 10Hz；
The operation of laser spot welding are as follows: in initial 0.5ms, make laser power rise to 100% total power from 0, then exist
Continue 8.5ms when 100% total power, laser spot welding work is completed within 100% total power duration, then in 0.4ms
Laser power is set to drop to 0 from 100% total power rapidly；
(3) by prefabricated solder paste be coated on surface to be welded in, prefabricated solder paste the preparation method comprises the following steps:
1. according to Pd:Ni:Cr:Mn: Ni-coated graphite alkene: the weight ratio of Re:Si:B=25:46:36:12:3.2:7:6:2 claims
Raw material is taken, mixing and being ground to partial size is 150 μm, and alloy powder is made；
2. weighing 15 parts by weight of distilled water, (trbasic zinc phosphate of weight ratio 36:45:15:14:7, gathers ammonium chloride water based adhesive
Ethylene glycol, Tisuacryl, high sodium sulphate mixture) 15 parts by weight, 5 parts by weight of acetone, 6 parts by weight of alcohol, mixing is simultaneously
It stirs evenly；
3. weigh 70 parts by weight of alloy powder, auxiliary additive (the barium glass powder of weight ratio 24:18:126, sodium tartrate,
Fumed silica mixture) 15 parts by weight be added step (2) mixture in, stir evenly, using diffusion in vacuum furnace to it
Vacuumized (vacuum degree 0.5 × 10-5MPa), it is made as solder paste in advance；
(4) remaining position to be welded in addition to laser spot welding position is attached using vacuum brazing, specifically comprises the processes of:
1. the entire workpiece for having been coated with prefabricated solder paste is put into vacuum chamber；
2. the vacuum degree of vacuum chamber unit is set, 10-6Pa；
3. set temperature control unit is heated above 50 DEG C of solder paste fusion temperature, carries out heat preservation 55s；
4. cooling down after the completion of heat preservation, when workpiece is cooled to room temperature, vacuum chamber is opened, when intracavitary external pressure is identical
When, take out workpiece；
5. weld seam is detected using infra-red inspection, if it find that there is existing defects in weld seam, using it is above-mentioned 1. -4. walk
It is rapid to carry out repair welding；If not occurring defect in weld seam, welding process terminates.
Mechanical polishing, electrobrightening, alcohol are cleaned method particularly includes:
(1) it mechanically polishes:
The workpiece surface that welds will be needed to carry out polishing processing, workpiece to be welded successively pass through 100#, 400#, 600#, 800#,
1000#, 1500# and 2000# Wet-dry abrasive paper for metallograph mechanical polishing after, then with pleuche polishing cloth cooperation M1.5 polishing agent
It is mechanically polished；
(2) electrobrightening:
Perchloric acid and ethyl alcohol are mixed with the ratio of volume ratio 1:4, obtain electrolytic polishing liquid；Utilize the electrolysis of preparation
Polishing fluid carries out electrobrightening to the workpiece that mechanically polishes through step (1), and electrobrightening DC voltage is 20V, electric current 1.0A,
Temperature is -20 DEG C, polishing time 75s；
(3) alcohol is cleaned:
After electrobrightening, workpiece is removed to the acid solution on its surface, i.e. completion surface preparation using ethyl alcohol cleaning.
Ni-coated graphite alkene the preparation method comprises the following steps:
(1) graphene oxide is taken, it is successively roughened, is sensitized and is activated；
(2) graphene oxide after sensitized treatment is put into reducing agent and is restored, reduction stone is made after washing, drying
Black alkene, it is spare；
(3) nickel plating is carried out on reduced graphene surface using electrodeposition process, Ni-coated graphite alkene is made；The parameter of electrodeposition process
It is as follows: current density: 3.7A/dm2, temperature: 35 DEG C, pH value: 4.5, deposit liquid: nickel sulfate 81g/L, nickel chloride 41g/L, boric acid
28g/L, dodecyl sodium sulfate 5.2g/L, deposition rate: 1.75 μm/min, sedimentation time: 180s；
(4) load is made in Ni-coated graphite alkene surface deposited metal molybdenum ion using direct current magnetron sputtering process has molybdenum ion
Ni-coated graphite alkene；The parameter of direct current magnetron sputtering process is as follows: target is that the nickel molybdenum (nickel weight of molybdenum ratio 3:7) of purity 99.99% closes
Gold target, substrate are glass slide, voltage power 0.8kV, vacuum degree 1.3 × 10-4When Pa, it is passed through the argon gas conduct of purity 99.99%
Electric discharge and sputter gas, sputtering power: 140W, sedimentation time: 2min；
(5) there is the Ni-coated graphite alkene of molybdenum ion to be put into ball grinder load to clay into power, Ni-coated graphite alkene powder be made,
The partial size of powder is 86 μm.
Embodiment 2
A kind of 7075 aluminium alloys/high nitrogen steel (N:5.8 parts by weight, Fe:51 parts by weight, Cr:29 parts by weight, Mn:26 weight
Part, Mo:6.5 parts by weight, C:0.3 parts by weight, Si:0.5 parts by weight, Nb:0.35 parts by weight, Al:0.06 parts by weight, S:0.05 weight
Measure part, P:0.08 parts by weight) laser spot welding-vacuum brazing complex welding method, comprising the following steps:
(1) machine is successively carried out to 7075 aluminium alloy plates with a thickness of 2.5mm and with a thickness of the high nitrogen steel plate position to be welded of 2mm
Tool polishing, electrobrightening, alcohol are cleaned, and are then docked aluminium alloy and high nitrogen steel position to be welded, are fixed with fixture；
(2) it carries out spot welding to position to be welded using laser spot welding method to fix, laser spot welding technological parameter are as follows: laser function
Rate: 500W；Spot welding total time: 180ms；Speed of welding: 8mm/s；The focal length of lens:Light frequency out: 15Hz；
The operation of laser spot welding are as follows: in initial 0.5ms, make laser power rise to 100% total power from 0, then exist
Continue 9ms when 100% total power, laser spot welding work is completed within 100% total power duration, is then made in 0.4ms
Laser power drops to 0 from 100% total power rapidly；
(3) by prefabricated solder paste be coated on surface to be welded in, prefabricated solder paste the preparation method comprises the following steps:
1. according to Pd:Ni:Cr:Mn: Ni-coated graphite alkene: the weight of Re:Si:B=28:39:39:15:7.5:11:9:5.5
Than weighing raw material, mixing and being ground to partial size is 150 μm, and alloy powder is made；
2. weigh 30 parts by weight of distilled water, water based adhesive (trbasic zinc phosphate of weight ratio 24:61:23:22:12, ammonium chloride,
Polyethylene glycol, Tisuacryl, high sodium sulphate mixture) 30 parts by weight, 12 parts by weight of acetone, 12 parts by weight of alcohol, it mixes
Merging stirs evenly；
3. weigh 45 parts by weight of alloy powder, auxiliary additive (the barium glass powder of weight ratio 36:12:84, sodium tartrate,
Fumed silica mixture) 21 parts by weight be added step (2) mixture in, stir evenly, using diffusion in vacuum furnace to it
Vacuumized (vacuum degree 0.5 × 10-5MPa), it is made as solder paste in advance；
(4) remaining position to be welded in addition to laser spot welding position is attached using vacuum brazing, specifically comprises the processes of:
1. the entire workpiece for having been coated with prefabricated solder paste is put into vacuum chamber；
2. the vacuum degree of vacuum chamber unit is set, 10-4Pa；
3. set temperature control unit is heated above 100 DEG C of solder paste fusion temperature, carries out heat preservation 45s；
4. cooling down after the completion of heat preservation, when workpiece is cooled to room temperature, vacuum chamber is opened, when intracavitary external pressure is identical
When, take out workpiece；
5. weld seam is detected using infra-red inspection, if it find that there is existing defects in weld seam, using it is above-mentioned 1. -4. walk
It is rapid to carry out repair welding；If not occurring defect in weld seam, welding process terminates.
Mechanical polishing, electrobrightening, alcohol are cleaned method particularly includes:
(1) it mechanically polishes:
The workpiece surface that welds will be needed to carry out polishing processing, workpiece to be welded successively pass through 100#, 400#, 600#, 800#,
1000#, 1500# and 2000# Wet-dry abrasive paper for metallograph mechanical polishing after, then with pleuche polishing cloth cooperation M1.5 polishing agent
It is mechanically polished；
(2) electrobrightening:
Perchloric acid and ethyl alcohol are mixed with the ratio of volume ratio 1:4, obtain electrolytic polishing liquid；Utilize the electrolysis of preparation
Polishing fluid carries out electrobrightening to the workpiece that mechanically polishes through step (1), and electrobrightening DC voltage is 15V, electric current 1.5A,
Temperature is -30 DEG C, polishing time 40s；
(3) alcohol is cleaned:
After electrobrightening, workpiece is removed to the acid solution on its surface, i.e. completion surface preparation using ethyl alcohol cleaning.
Ni-coated graphite alkene the preparation method comprises the following steps:
(1) graphene oxide is taken, it is successively roughened, is sensitized and is activated；
(2) graphene oxide after sensitized treatment is put into reducing agent and is restored, reduction stone is made after washing, drying
Black alkene, it is spare；
(3) nickel plating is carried out on reduced graphene surface using electrodeposition process, Ni-coated graphite alkene is made；The parameter of electrodeposition process
It is as follows: current density: 2.5A/dm2, temperature: 46 DEG C, pH value: 6.8, deposit liquid: nickel sulfate 61g/L, nickel chloride 50g/L, boric acid
36g/L, dodecyl sodium sulfate 6.8g/L, deposition rate: 1.3 μm/min, sedimentation time: 365s；
(4) load is made in Ni-coated graphite alkene surface deposited metal molybdenum ion using direct current magnetron sputtering process has molybdenum ion
Ni-coated graphite alkene；The parameter of direct current magnetron sputtering process is as follows: target is that the nickel molybdenum (nickel weight of molybdenum ratio 3:7) of purity 99.99% closes
Gold target, substrate are glass slide, voltage power 0.95kV, vacuum degree 0.8 × 10-4When Pa, it is passed through the argon gas conduct of purity 99.99%
Electric discharge and sputter gas, sputtering power: 110W, sedimentation time: 2.5min；
(5) there is the Ni-coated graphite alkene of molybdenum ion to be put into ball grinder load to clay into power, Ni-coated graphite alkene powder be made,
The partial size of powder is 112 μm.
Embodiment 3
A kind of 7005 aluminium alloys/high nitrogen steel (N:4.3 parts by weight, Fe:58 parts by weight, Cr:26.5 parts by weight, Mn:23.5 weight
Amount part, Mo:5.85 parts by weight, C:0.25 parts by weight, Si:0.4 parts by weight, Nb:0.275 parts by weight, Al:0.055 parts by weight, S:
0.035 parts by weight, P:0.065 parts by weight) laser spot welding-vacuum brazing complex welding method, comprising the following steps:
(1) to a thickness of 1.75mm 7005 aluminium alloy plates and with a thickness of 1.75mm high nitrogen steel plate position to be welded successively into
Row mechanical polishing, electrobrightening, alcohol are cleaned, and are then docked aluminium alloy and high nitrogen steel position to be welded, are fixed with fixture；
(2) it carries out spot welding to position to be welded using laser spot welding method to fix, laser spot welding technological parameter are as follows: laser function
Rate: 450W；Spot welding total time: 150ms；Speed of welding: 6.5mm/s；The focal length of lens:Light frequency out:
12.5Hz；
The operation of laser spot welding are as follows: in initial 0.5ms, make laser power rise to 100% total power from 0, then exist
Continue 8.75ms when 100% total power, laser spot welding work is completed within 100% total power duration, then in 0.4ms
Laser power is set to drop to 0 from 100% total power rapidly；
(3) by prefabricated solder paste be coated on surface to be welded in, prefabricated solder paste the preparation method comprises the following steps:
1. according to Pd:Ni:Cr:Mn: Ni-coated graphite alkene: Re:Si:B=26.5:42.5:37.5:13.5:5.35:9:7.5:
3.75 weight ratio weighs raw material, and mixing and being ground to partial size is 150 μm, and alloy powder is made；
2. weighing 15 parts by weight of distilled water, (trbasic zinc phosphate of weight ratio 36:45:15:14:7, gathers ammonium chloride water based adhesive
Ethylene glycol, Tisuacryl, high sodium sulphate mixture) 15 parts by weight, 5 parts by weight of acetone, 6 parts by weight of alcohol, mixing is simultaneously
It stirs evenly；
3. weigh 70 parts by weight of alloy powder, auxiliary additive (the barium glass powder of weight ratio 30:15:105, sodium tartrate,
Fumed silica mixture) 18 parts by weight be added step (2) mixture in, stir evenly, using diffusion in vacuum furnace to it
Vacuumized (vacuum degree 0.5 × 10-5MPa), it is made as solder paste in advance；
(4) remaining position to be welded in addition to laser spot welding position is attached using vacuum brazing, specifically comprises the processes of:
1. the entire workpiece for having been coated with prefabricated solder paste is put into vacuum chamber；
2. the vacuum degree of vacuum chamber unit is set, 10-5Pa；
3. set temperature control unit is heated above 75 DEG C of solder paste fusion temperature, carries out heat preservation 50s；
4. cooling down after the completion of heat preservation, when workpiece is cooled to room temperature, vacuum chamber is opened, when intracavitary external pressure is identical
When, take out workpiece；
5. weld seam is detected using infra-red inspection, if it find that there is existing defects in weld seam, using it is above-mentioned 1. -4. walk
It is rapid to carry out repair welding；If not occurring defect in weld seam, welding process terminates.
Mechanical polishing, electrobrightening, alcohol are cleaned method particularly includes:
(1) it mechanically polishes:
The workpiece surface that welds will be needed to carry out polishing processing, workpiece to be welded successively pass through 100#, 400#, 600#, 800#,
1000#, 1500# and 2000# Wet-dry abrasive paper for metallograph mechanical polishing after, then with pleuche polishing cloth cooperation M1.5 polishing agent
It is mechanically polished；
(2) electrobrightening:
Perchloric acid and ethyl alcohol are mixed with the ratio of volume ratio 1:4, obtain electrolytic polishing liquid；Utilize the electrolysis of preparation
Polishing fluid carries out electrobrightening to the workpiece mechanically polished through step (1), and electrobrightening DC voltage is 17.5V, and electric current is
1.25A, temperature are -25 DEG C, polishing time 57.5s；
(3) alcohol is cleaned:
After electrobrightening, workpiece is removed to the acid solution on its surface, i.e. completion surface preparation using ethyl alcohol cleaning.
Ni-coated graphite alkene the preparation method comprises the following steps:
(1) graphene oxide is taken, it is successively roughened, is sensitized and is activated；
(2) graphene oxide after sensitized treatment is put into reducing agent and is restored, reduction stone is made after washing, drying
Black alkene, it is spare；
(3) nickel plating is carried out on reduced graphene surface using electrodeposition process, Ni-coated graphite alkene is made；The parameter of electrodeposition process
It is as follows: current density: 3.1A/dm2, temperature: 40 DEG C, pH value: 6.1, deposit liquid: nickel sulfate 71g/L, nickel chloride 45.5g/L, boron
Sour 32g/L, dodecyl sodium sulfate 6.0g/L, deposition rate: 1.5 μm/min, sedimentation time: 250s；
(4) load is made in Ni-coated graphite alkene surface deposited metal molybdenum ion using direct current magnetron sputtering process has molybdenum ion
Ni-coated graphite alkene；The parameter of direct current magnetron sputtering process is as follows: target is that the nickel molybdenum (nickel weight of molybdenum ratio 3:7) of purity 99.99% closes
Gold target, substrate are glass slide, voltage power 0.875kV, vacuum degree 1.05 × 10-4When Pa, the argon gas for being passed through purity 99.99% is made
For electric discharge and sputter gas, sputtering power: 125W, sedimentation time: 2.25min；
(5) there is the Ni-coated graphite alkene of molybdenum ion to be put into ball grinder load to clay into power, Ni-coated graphite alkene powder be made,
The partial size of powder is 99 μm.
Embodiment 4
A kind of 7075 aluminium alloys/high nitrogen steel (N:3.5 parts by weight, Fe:55 parts by weight, Cr:25 parts by weight, Mn:22 weight
Part, Mo:6.1 parts by weight, C:0.21 parts by weight, Si:0.45 parts by weight, Nb:0.3 parts by weight, Al:0.052 parts by weight, S:0.03
Parts by weight, P:0.06 parts by weight) laser spot welding-vacuum brazing complex welding method, comprising the following steps:
(1) machine is successively carried out to 7075 aluminium alloy plates with a thickness of 2mm and with a thickness of the high nitrogen steel plate position to be welded of 1.8mm
Tool polishing, electrobrightening, alcohol are cleaned, and are then docked aluminium alloy and high nitrogen steel position to be welded, are fixed with fixture；
(2) it carries out spot welding to position to be welded using laser spot welding method to fix, laser spot welding technological parameter are as follows: laser function
Rate: 475W；Spot welding total time: 160ms；Speed of welding: 7mm/s；The focal length of lens:Light frequency out: 13.5Hz；
The operation of laser spot welding are as follows: in initial 0.5ms, make laser power rise to 100% total power from 0, then exist
Continue 8.8ms when 100% total power, laser spot welding work is completed within 100% total power duration, then in 0.4ms
Laser power is set to drop to 0 from 100% total power rapidly；
(3) by prefabricated solder paste be coated on surface to be welded in, prefabricated solder paste the preparation method comprises the following steps:
1. according to Pd:Ni:Cr:Mn: Ni-coated graphite alkene: the weight ratio of Re:Si:B=27:45:37:14:4.5:10:8:5
Raw material is weighed, mixing and being ground to partial size is 150 μm, and alloy powder is made；
2. weigh 20 parts by weight of distilled water, water based adhesive (trbasic zinc phosphate of weight ratio 25:50:20:20:10, ammonium chloride,
Polyethylene glycol, Tisuacryl, high sodium sulphate mixture) 25 parts by weight, 10 parts by weight of acetone, 10 parts by weight of alcohol, it mixes
Merging stirs evenly；
3. weigh 60 parts by weight of alloy powder, auxiliary additive (the barium glass powder of weight ratio 25:16:100, sodium tartrate,
Fumed silica mixture) 20 parts by weight be added step (2) mixture in, stir evenly, using diffusion in vacuum furnace to it
Vacuumized (vacuum degree 0.5 × 10-5MPa), it is made as solder paste in advance；
(4) remaining position to be welded in addition to laser spot welding position is attached using vacuum brazing, specifically comprises the processes of:
1. the entire workpiece for having been coated with prefabricated solder paste is put into vacuum chamber；
2. the vacuum degree of vacuum chamber unit is set, 10-6Pa；
3. set temperature control unit is heated above 80 DEG C of solder paste fusion temperature, carries out heat preservation 49s；
4. cooling down after the completion of heat preservation, when workpiece is cooled to room temperature, vacuum chamber is opened, when intracavitary external pressure is identical
When, take out workpiece；
5. weld seam is detected using infra-red inspection, if it find that there is existing defects in weld seam, using it is above-mentioned 1. -4. walk
It is rapid to carry out repair welding；If not occurring defect in weld seam, welding process terminates.
Mechanical polishing, electrobrightening, alcohol are cleaned method particularly includes:
(1) it mechanically polishes:
The workpiece surface that welds will be needed to carry out polishing processing, workpiece to be welded successively pass through 100#, 400#, 600#, 800#,
1000#, 1500# and 2000# Wet-dry abrasive paper for metallograph mechanical polishing after, then with pleuche polishing cloth cooperation M1.5 polishing agent
It is mechanically polished；
(2) electrobrightening:
Perchloric acid and ethyl alcohol are mixed with the ratio of volume ratio 1:4, obtain electrolytic polishing liquid；Utilize the electrolysis of preparation
Polishing fluid carries out electrobrightening to the workpiece that mechanically polishes through step (1), and electrobrightening DC voltage is 18V, electric current 1.2A,
Temperature is -26 DEG C, polishing time 50s；
(3) alcohol is cleaned:
After electrobrightening, workpiece is removed to the acid solution on its surface, i.e. completion surface preparation using ethyl alcohol cleaning.
Ni-coated graphite alkene the preparation method comprises the following steps:
(1) graphene oxide is taken, it is successively roughened, is sensitized and is activated；
(2) graphene oxide after sensitized treatment is put into reducing agent and is restored, reduction stone is made after washing, drying
Black alkene, it is spare；
(3) nickel plating is carried out on reduced graphene surface using electrodeposition process, Ni-coated graphite alkene is made；The parameter of electrodeposition process
It is as follows: current density: 3.5A/dm2, temperature: 38 DEG C, pH value: 6, deposit liquid: nickel sulfate 75g/L, nickel chloride 45g/L, boric acid
30g/L, dodecyl sodium sulfate 5.5g/L, deposition rate: 1.6 μm/min, sedimentation time: 200s；
(4) load is made in Ni-coated graphite alkene surface deposited metal molybdenum ion using direct current magnetron sputtering process has molybdenum ion
Ni-coated graphite alkene；The parameter of direct current magnetron sputtering process is as follows: target is that the nickel molybdenum (nickel weight of molybdenum ratio 3:7) of purity 99.99% closes
Gold target, substrate are glass slide, voltage power 0.95kV, vacuum degree 1.2 × 10-4When Pa, it is passed through the argon gas conduct of purity 99.99%
Electric discharge and sputter gas, sputtering power: 130W, sedimentation time: 2.1min；
(5) there is the Ni-coated graphite alkene of molybdenum ion to be put into ball grinder load to clay into power, Ni-coated graphite alkene powder be made,
The partial size of powder is 95 μm.
Laser spot welding of the present invention-vacuum brazing composite welding effect detection:
1, influence of the different welding manners to nitrogen content
1-4 of embodiment of the present invention laser spot welding-vacuum brazing composite welding is welded using the measurement of TCH-600 gas combined measuring instrument
The nitrogen content for connecing front and back is detected, while using existing laser welding-brazing, Laser Welding, diffusion welding (DW) to embodiment 1-4 metal plate
It is welded, the measurement range of the nitrogen content after detection welding, nitrogen is 0.05ppm~5%, the results are shown in Table 1.Table 1 the result shows that,
Laser spot welding of the present invention-vacuum brazing complex welding method welding front and back nitrogen almost free of losses, can stablize in high nitrogen steel
Austenite, improve the yield strength of high nitrogen steel without reducing toughness, enhance the corrosion resistance of high nitrogen steel, inhibit the analysis of carbide
Out.
Influence (unit: %) of the different welding methods of table 1 to welding front and back nitrogen content
2, the influence of different welding manner Welded Joints tensile strength
1-4 of embodiment of the present invention laser spot welding-vacuum brazing composite welding connector tensile strength is detected, simultaneously
Embodiment 1-4 metal plate is welded using existing laser welding-brazing, Laser Welding, diffusion welding (DW), the tensile strength of detection tabs,
It the results are shown in Table 2.Table 2 the result shows that, method of the invention can effectively improve the tensile strength of welding point.
The influence of the different welding method butt joint tensile strength of table 2
3, the influence of different composite welding manner Welded Joints tensile strength
1-4 of embodiment of the present invention laser spot welding-vacuum brazing composite welding connector tensile strength is detected, simultaneously
Embodiment 1-4 metal plate is welded using existing laser spot welding-gas brazing, laser spot welding-induction brazing, detection tabs
Tensile strength, the results are shown in Table 3.Table 3 the result shows that, method of the invention can effectively improve the tensile strength of welding point.
And gas brazing, induction brazing are unable to accurately control due to welding temperature, are easy to generate remaining so that welding heat affected zone expands
Stress, fire check, cause welding joint mechanical property to decline.Therefore, laser spot welding should not be with induction brazing, flame brazing method
It is compound.
The influence of 3 different composite welding manner Welded Joints tensile strength of table
4, the influence of different laser spot welding technological parameter Welded Joints tensile strength
The tensile strength of 1-4 of embodiment of the present invention welding point is measured, and accordingly adjusts laser spot welding in embodiment 1-4
Technological parameter measures the tensile strength of welding point after laser spot welding technical arrangement plan, the results are shown in Table 4.Table 4 the result shows that,
Using test of many times of the present invention, the preferred laser welding process of series, power is moderate, the time is shorter, frequency stabilization, welding point
Tensile strength it is high, it is higher by 15.7~27.5% than the connector tensile strength that not preferred technological parameter obtains.
The influence of the different laser spot welding technological parameter Welded Joints tensile strength of table 4
The foregoing is merely the optimal embodiments of the present invention, and for those skilled in the art, the present invention can have
Various modifications and variations.All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on, should all
It is included within protection scope of the present invention.
Claims (10)
1. a kind of for aluminium alloy/high nitrogen steel laser spot welding-vacuum brazing complex welding method, which is characterized in that right first
Aluminium alloy and high nitrogen steel position to be welded carry out surface preparation, the fixed position to be welded of fixture, secondly using laser spot welding to be welded
Position carries out spot welding and fixes, and then prefabricated solder paste is coated in surface to be welded, finally using vacuum brazing in addition to laser point
Remaining position to be welded that welding position is set is attached.
2. according to claim 1 be used for aluminium alloy/high nitrogen steel laser spot welding-vacuum brazing complex welding method,
It is characterized in that, the aluminium alloy is 7 line aluminium alloys；The nitrogen content of the high nitrogen steel is more than 0.9wt%.
3. according to claim 1 be used for aluminium alloy/high nitrogen steel laser spot welding-vacuum brazing complex welding method,
It is characterized in that, the high nitrogen steel includes the raw material of following parts by weight: N:2.8~5.8 part, Fe:51~65 part, Cr:24~29
Part, Mn:21~26 part, Mo:5.2~6.5 part, C:0.2~0.3 part, Si:0.3~0.5 part, Nb:0.2~0.35 part, Al:
0.05~0.06 part, S:0.02~0.05 part, P:0.05~0.08 part.
4. according to claim 1 be used for aluminium alloy/high nitrogen steel laser spot welding-vacuum brazing complex welding method,
It is characterized in that, the process for surface preparation are as follows: aluminium alloy and high nitrogen steel position to be welded are successively mechanically polished, are electrolysed
Polishing, alcohol are cleaned.
5. according to claim 1 be used for aluminium alloy/high nitrogen steel laser spot welding-vacuum brazing complex welding method,
It is characterized in that, the technological parameter of the laser spot welding are as follows: laser power: 400~500W；Spot welding total time: 120~180ms；
Speed of welding: 5~8mm/s；The focal length of lens:Light frequency out: 10~15Hz.
6. according to claim 1 be used for aluminium alloy/high nitrogen steel laser spot welding-vacuum brazing complex welding method,
It is characterized in that, the operation of the laser spot welding are as follows: in initial 0.5ms, laser power is made to rise to 100% total power from 0,
Then continue 8.5~9ms in 100% total power, laser spot welding work is completed within 100% total power duration, then
Laser power is set to drop to 0 from 100% total power rapidly in 0.4ms.
7. according to claim 1 be used for aluminium alloy/high nitrogen steel laser spot welding-vacuum brazing complex welding method,
Be characterized in that, the solder paste the preparation method comprises the following steps:
(1) according to Pd:Ni:Cr:Mn: Ni-coated graphite alkene: Re:Si:B=25~28:39~46:36~39:12~15:3.2~
7.5:7~11:6~9:2~5.5 weight ratio weighs raw material, and is mixed to prepare alloy powder；
(2) weigh 15~30 parts by weight of distilled water, 15~30 parts by weight of water based adhesive, 5~12 parts by weight of acetone, alcohol 6~
12 parts by weight are mixed and stirred for uniformly；
(3) weigh 45~70 parts by weight of alloy powder, 15~21 parts by weight of auxiliary additive be added step (2) mixture in,
It stirs evenly, and vacuumizes spare.
8. according to claim 7 be used for aluminium alloy/high nitrogen steel laser spot welding-vacuum brazing complex welding method,
Be characterized in that, the Ni-coated graphite alkene the preparation method comprises the following steps:
(1) graphene oxide is taken, it is successively roughened, is sensitized and is activated；
(2) graphene oxide after sensitized treatment is put into reducing agent and is restored, reduction graphite is made after washing, drying
Alkene, it is spare；
(3) nickel plating is carried out on reduced graphene surface using electrodeposition process, Ni-coated graphite alkene is made；The parameter of electrodeposition process is preferred
It is as follows: current density: 2.5~3.7A/dm2, temperature: 35~46 DEG C, pH value: 4.5~6.8, deposit liquid: 61~81g/ of nickel sulfate
L, 41~50g/L of nickel chloride, 28~36g/L of boric acid, 5.2~6.8g/L of dodecyl sodium sulfate, deposition rate: 1.3~1.75 μ
M/min, sedimentation time: 180~365s；
(4) nickel plating that load has molybdenum ion is made in Ni-coated graphite alkene surface deposited metal molybdenum ion using direct current magnetron sputtering process
Graphene；The parameter of direct current magnetron sputtering process is preferably as follows: target is the weight ratio 3:7 nickel-molybdenum alloy target of purity 99.99%, base
Piece is glass slide, 0.8~0.95kV of voltage power, vacuum degree (0.8~1.3) × 10-4When Pa, it is passed through the argon of purity 99.99%
Gas is as electric discharge and sputter gas, sputtering power: 110~140W, sedimentation time: 2~2.5min；
(5) there is the Ni-coated graphite alkene of molybdenum ion to be put into ball grinder load to clay into power, Ni-coated graphite alkene powder, powder is made
Partial size be preferably 86~112 μm.
9. according to claim 7 be used for aluminium alloy/high nitrogen steel laser spot welding-vacuum brazing complex welding method,
It is characterized in that, the water based adhesive is 24~36:45 of weight ratio~61:15~23:14~22:7~12 trbasic zinc phosphate, chlorine
Change ammonium, polyethylene glycol, Tisuacryl, high sodium sulphate mixture；
The auxiliary additive is 24~36:12 of weight ratio~18:84~126 barium glass powder, sodium tartrate, gas phase dioxy
SiClx mixture.
10. according to claim 1 be used for aluminium alloy/high nitrogen steel laser spot welding-vacuum brazing complex welding method,
It is characterized in that, the vacuum brazing method particularly includes:
(1) the entire workpiece for having been coated with prefabricated solder paste is put into vacuum chamber；
(2) vacuum degree of setting vacuum chamber unit, 10-6~10-4Pa；
(3) set temperature control unit is heated above 50~100 DEG C of solder paste fusion temperature, carries out 45~55s of heat preservation；
(4) after the completion of keeping the temperature, cool down, when workpiece is cooled to room temperature, open vacuum chamber, when intracavitary external pressure is identical,
Take out workpiece；
(5) weld seam is detected using infra-red inspection, if it find that there are existing defects in weld seam, using above-mentioned (1)-(4) step
It is rapid to carry out repair welding；If not occurring defect in weld seam, welding process terminates.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110977171A (en) * | 2019-11-12 | 2020-04-10 | 江苏大学 | Vacuum laser-electric arc hybrid welding method and device for improving weld formation |
| CN113102854A (en) * | 2021-03-29 | 2021-07-13 | 浙江浪潮精密机械有限公司 | Automatic continuous brazing device and method for hard alloy cutter |
| CN115673583A (en) * | 2022-11-01 | 2023-02-03 | 成都科力深传感技术有限公司 | High-precision stress-free welding method based on laser welding and brazing |
-
2018
- 2018-10-15 CN CN201811196590.4A patent/CN109158779A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110977171A (en) * | 2019-11-12 | 2020-04-10 | 江苏大学 | Vacuum laser-electric arc hybrid welding method and device for improving weld formation |
| CN113102854A (en) * | 2021-03-29 | 2021-07-13 | 浙江浪潮精密机械有限公司 | Automatic continuous brazing device and method for hard alloy cutter |
| CN113102854B (en) * | 2021-03-29 | 2022-11-15 | 浙江浪潮精密机械有限公司 | Automatic continuous brazing device and method for hard alloy cutter |
| CN115673583A (en) * | 2022-11-01 | 2023-02-03 | 成都科力深传感技术有限公司 | High-precision stress-free welding method based on laser welding and brazing |
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