CN105397296A - Laser deposition-melt injection synchronous compound connecting method - Google Patents
Laser deposition-melt injection synchronous compound connecting method Download PDFInfo
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- CN105397296A CN105397296A CN201511027899.7A CN201511027899A CN105397296A CN 105397296 A CN105397296 A CN 105397296A CN 201511027899 A CN201511027899 A CN 201511027899A CN 105397296 A CN105397296 A CN 105397296A
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
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Abstract
The invention relates to a laser deposition-melt injection synchronous compound connecting method. The laser deposition-melt injection synchronous compound connecting method aims at solving the problems that a metal matrix composite welding reinforcement phase is damaged by fire, air hole defect tendency is great, brittle intermetallic compounds are easy to produce, early-stage preparation process of laser powder filling welding is relatively complex, and the more reinforcement phase is dissolved in high temperature liquid metal. The method disclosed by the invention comprises the following steps of machining a to-be-welded workpiece, installing a powder feeding head, setting welding technological parameters, and starting a machine for welding. According to the method disclosed by the invention, energy input is accurate and controllable, material components are convenient to adjust, reinforcement phase particles can be prevented from being damaged by fire as far as possible due to adoption of a melt injection method, the flexibility is great, the automation degree is high, and minimum feature size and heat input are only limited by minimum spot size.
Description
Technical field
The present invention relates to a kind of metal-base composites laser weld new method, belong to materials processing engineering field.
Background technology
Metal-base composites (MetalMatrixComposites, be called for short MMCs) the excellent combination property of the high specific strength, specific modulus, good heat conduction, electric conductivity, wearability, high-temperature behavior, low thermal coefficient of expansion, high dimensional stability etc. that have, metal-base composites is all with a wide range of applications in space flight, aviation, electronics, automobile and sophisticated and futuristic weapons system.Relative to simple metal material, due to metal-base composites complex manufacturing technology, cost intensive, this limits the application of metal-base composites to a certain extent.Metal-base composites can be divided into continuous fiber composite material, short fiber composite material, particulate reinforced composite, woven composite etc. according to the difference of reinforcement morphology.Preparation technology mainly contains powder metallurgy, stirring casting, jet deposition and Pressure Infiltration etc.
Due to the microstructure that metal-base composites is special, between matrix and reinforcement there is very large difference in physicochemical properties, and this excellent properties of metallic matrix and reinforcement that both made metal-base composites have concurrently, can overcome again the performance deficiency of the two.But, also just this special microstructure feature of metal-base composites determine its welding difficulty much bigger relative to conventional metal material.
At present, to the connection investigation and application of metal-base composites many concentrate on melting, Solid-State Welding, soldering three major types.Melting mainly comprises TIG, MIG, MAG weldering etc.; Solid-State Welding mainly contains Transient Liquid-phase Bonding (TLP), solids control equipment, friction stir welding etc.; Soldering then has the soldering in air atmosphere, the soldering in protective atmosphere, vacuum brazing etc.During melting welding, the existence of reinforcement reduces molten bath mobility, easily causes that appearance of weld is poor, the defect such as pore and crackle; Meanwhile, in the case of a high temperature, easily there is interfacial reaction between wild phase and parent metal and generate frangible compounds.Therefore, conventional melt welding method is difficult to realize particles reiforced metal-base composition high-quality and connects.
Mainly there is following problem in the normal melting welding of metal-base composites:
One, appearance of weld is poor.Wild phase reduces molten bath mobility, and metallic matrix easily occurs in welding process simultaneously and splashes, form welding depression, wild phase residue is attached to weld edge.
Two, wild phase skewness.In welding process parent metal fusing and wild phase is non-fusible, reinforcement pass by advancing liquid-solid boundary, cause the wild phase skewness in weld seam.
Three, interfacial reaction forms frangible compounds.In welding process can there is interfacial reaction in parent metal material and wild phase usually, and as in SiCp/Al composite plate weld, SiC particle and Al occur to react as follows:
SiC(s)+Al(l)|Al
4C
3(s)+Si(s)
Interfacial reaction not only can consume wild phase, weakens it and strengthens effect; And interfacial reaction product mostly is brittlement phase, seriously undermines joint performance.
Four, weld defect tendency is large.Due to physical property marked difference between metallic matrix and wild phase, in welding process, the defect such as crackle, pore, incomplete fusion tendency is large.
Compare melting, although solid diffusivity can avoid the fusing of composite, do not occur to strengthen interfacial reaction between particle and parent metal, avoid the generation of brittlement phase, but in Solid-State Welding process, materials to be welded need apply larger pressure, easily causes the joint interface composite of mother metal and wild phase or wild phase itself to destroy.
And for soldering, compared with other welding methods, heating temperature is low, mother metal is non-fusible, not easily causes the interfacial reaction between matrix and wild phase; And brazing deformation is little, joint is attractive in appearance, but the existence of wild phase particle, serious obstruction solder is the wetting of mother metal surface and sprawl, and there is the Weak link between matrix-wild phase, wild phase-wild phase simultaneously, has a strong impact on joint performance.
Summary of the invention
The object of the invention is to solve wild phase scaling loss when metal-base composites welds, gas hole defect tendency large, easy generation brittle intermetallic thing, there is again early-stage preparations process relative complex in laser powder-filled welding process, wild phase dissolves the problems such as more in high temperature fluent metal.And provide a kind of laser deposition-synchronous composite connecting method of molten note.
A kind of laser deposition of the present invention-synchronous composite connecting method of molten note, it carries out according to following steps:
Step one: double V-groove is processed at the position to be welded of workpiece to be welded;
Step 2: groove and neighbouring surface of position are cleared up, polished, and with fixture, clamping workpiece to be welded is fixed on the table;
Step 3: install coaxial and paraxonic feeding head, welding condition is set:
Laser power is 600W ~ 5000W, and spot diameter is 1mm ~ 4mm, and speed of welding is 3mm/s ~ 15mm/s; Powder feed rate is 2g/min ~ 15g/min, and powder feeding carrier gas flux is 3L/min ~ 20L/min, and wild phase particle injection rate is 2g/min ~ 20g/min, and implant angle is 30 ° ~ 70 °, and protection gas and line throughput are 5L/min; Laser head leans forward 5 ° along welding direction;
Step 4: adopt coaxial powder feeding head to send into powder filler to position while welding, control the technological parameter that generating device of laser performs step 3, produce laser beam, under laser irradiation, melting powder forms molten bath;
Step 5: while the welding of coaxial feeding powder filler, inject wild phase particle at the rear portion in molten bath by paraxonic feeding head in molten bath, namely completes described laser deposition-synchronous composite joint of molten note.
Powder filler mixes with wild phase particle powder ball mill by the present invention, obtained mixing powder filler; To mix powder filler loads in powder feeding machine; Wherein, the volume mixing powder filler is greater than the volume of workpiece weld groove position to be welded.
In mixing powder filler, the ratio of powder filler and wild phase particle is determined according to the ratio of matrix material and wild phase in workpiece to be welded, and the volume namely mixing powder filler is greater than the volume of matrix and wild phase in metal-base composites to be welded.
Powder filler material of the present invention is different according to the difference of material to be welded, the general alloy powder selecting to match with welding base metal composition.
Wild phase particle of the present invention and mother metal wild phase Particle Phase are together; There is scaling loss to avoid wild phase particle and laser or high temperature molten bath direct effect, and form new composite layer at weld seam and connect two mother metals.
The present invention comprises following beneficial effect:
Adopt the method for laser powder-filled deposition-molten note, powder filler is separated with wild phase particle and sends into weld seam, avoid mixed-powder mechanical milling process in Preparatory work of experiment process, and experimentally situation can regulate feeding speed and the feeding amount of powder filler and wild phase particle in real time.
Method energy input controllable precise of the present invention; Conveniently regulate material component; Flexibility is large, automaticity is high; Minimum feature size and heat input are only limited to minimum spot size.Most distinguishing feature is that wild phase adopts the method for molten note to be filled into rear, weld seam molten bath in addition, not with laser energy direct effect, can avoid wild phase particle scaling loss, wild phase is sent into from the rear, molten bath that temperature is lower simultaneously, effectively can suppress the dissolving of wild phase particle in liquid metal as far as possible.
Accompanying drawing explanation
Fig. 1 is laser deposition of the present invention-synchronous composite joint schematic diagram of molten note;
Fig. 2 is the welding point metallograph of embodiment 1;
Fig. 3 is the welding point micro-organization chart of embodiment 1;
Fig. 4 is the welding point metallograph of embodiment 2;
Fig. 5 is the welding point micro-organization chart of embodiment 2.
Detailed description of the invention
Detailed description of the invention one: a kind of laser deposition-synchronous composite connecting method of molten note of present embodiment, it carries out according to following steps:
Step one: double V-groove is processed at the position to be welded of workpiece to be welded;
Step 2: groove and neighbouring surface of position are cleared up, polished, and with fixture, clamping workpiece to be welded is fixed on the table;
Step 3: install coaxial and paraxonic feeding head, welding condition is set:
Laser power is 600W ~ 5000W, and spot diameter is 1mm ~ 4mm, and speed of welding is 3mm/s ~ 15mm/s; Powder feed rate is 2g/min ~ 15g/min, and powder feeding carrier gas flux is 3L/min ~ 20L/min, and wild phase particle injection rate is 2g/min ~ 20g/min, and implant angle is 30 ° ~ 70 °, and protection gas and line throughput are 5L/min; Laser head leans forward 5 ° along welding direction;
Step 4: adopt coaxial powder feeding head to send into powder filler to position while welding, control the technological parameter that generating device of laser performs step 3, produce laser beam, under laser irradiation, melting powder forms molten bath;
Step 5: while the welding of coaxial feeding powder filler, inject wild phase particle at the rear portion in molten bath by paraxonic feeding head in molten bath, namely completes described laser deposition-synchronous composite joint of molten note.
Powder filler mixes with wild phase particle powder ball mill by present embodiment, obtained mixing powder filler; To mix powder filler loads in powder feeding machine; Wherein, the volume mixing powder filler is greater than the volume of workpiece weld groove position to be welded.
In mixing powder filler, the ratio of powder filler and wild phase particle is determined according to the ratio of matrix material and wild phase in workpiece to be welded, and the volume namely mixing powder filler is greater than the volume of matrix and wild phase in metal-base composites to be welded.
Detailed description of the invention two: present embodiment and detailed description of the invention one unlike: the laser instrument of Emission Lasers is semiconductor laser, CO
2gas laser, YAG solid state laser or optical fiber laser.Other is identical with detailed description of the invention one.
Detailed description of the invention three: present embodiment and detailed description of the invention one unlike: the technological parameter of step 3 is: laser power is 800W ~ 5000W, and spot diameter is 1mm ~ 4mm, and speed of welding is 3mm/s ~ 15mm/s; Powder feed rate is 2g/min ~ 15g/min, and powder feeding carrier gas flux is 3L/min ~ 20L/min, and wild phase particle injection rate is 2g/min ~ 20g/min, and implant angle is 30 ° ~ 70 °, and protection gas and line throughput are 5L/min; Laser head leans forward 5 ° along welding direction.Other is identical with detailed description of the invention one.
Detailed description of the invention four: present embodiment and detailed description of the invention one unlike: the technological parameter of step 3 is: laser power is 1000W ~ 5000W, and spot diameter is 1mm ~ 4mm, and speed of welding is 5mm/s ~ 15mm/s; Powder feed rate is 5g/min ~ 15g/min, and powder feeding carrier gas flux is 5L/min ~ 20L/min, and wild phase particle injection rate is 5g/min ~ 20g/min, and implant angle is 30 ° ~ 70 °, and protection gas and line throughput are 5L/min; Laser head leans forward 5 ° along welding direction.Other is identical with detailed description of the invention one.
Detailed description of the invention five: present embodiment and detailed description of the invention one unlike: the technological parameter of step 3 is: laser power is 2000W ~ 5000W, and spot diameter is 1mm ~ 4mm, and speed of welding is 8mm/s ~ 15mm/s; Powder feed rate is 8g/min ~ 15g/min, and powder feeding carrier gas flux is 8L/min ~ 20L/min, and wild phase particle injection rate is 8g/min ~ 20g/min, and implant angle is 30 ° ~ 70 °, and protection gas and line throughput are 5L/min; Laser head leans forward 5 ° along welding direction.Other is identical with detailed description of the invention one.
Detailed description of the invention six: present embodiment and detailed description of the invention one unlike: the technological parameter of step 3 is: laser power is 3000W ~ 5000W, and spot diameter is 1mm ~ 4mm, and speed of welding is 10mm/s ~ 15mm/s; Powder feed rate is 10g/min ~ 15g/min, and powder feeding carrier gas flux is 10L/min ~ 20L/min, and wild phase particle injection rate is 10g/min ~ 20g/min, and implant angle is 30 ° ~ 70 °, and protection gas and line throughput are 5L/min; Laser head leans forward 5 ° along welding direction.Other is identical with detailed description of the invention one.
Detailed description of the invention seven: present embodiment and detailed description of the invention one unlike: the technological parameter of step 3 is: laser power is 4000W ~ 5000W, and spot diameter is 1mm ~ 4mm, and speed of welding is 12mm/s ~ 15mm/s; Powder feed rate is 12g/min ~ 15g/min, and powder feeding carrier gas flux is 15L/min ~ 20L/min, and wild phase particle injection rate is 15g/min ~ 20g/min, and implant angle is 30 ° ~ 70 °, and protection gas and line throughput are 5L/min; Laser head leans forward 5 ° along welding direction.Other is identical with detailed description of the invention one.
Detailed description of the invention eight: present embodiment and detailed description of the invention one unlike: the technological parameter of step 3 is: laser power is 4500W, and spot diameter is 1mm ~ 4mm, and speed of welding is 10mm/s; Powder feed rate is 10g/min, and powder feeding carrier gas flux is 15L/min, and wild phase particle injection rate is 15g/min, and implant angle is 30 ° ~ 70 °, and protection gas and line throughput are 5L/min; Laser head leans forward 5 ° along welding direction.Other is identical with detailed description of the invention one.
Detailed description of the invention nine: present embodiment and detailed description of the invention one unlike: the technological parameter of step 3 is: laser power is 3000W, and spot diameter is 1mm ~ 4mm, and speed of welding is 15mm/s; Powder feed rate is 15g/min, and powder feeding carrier gas flux is 20L/min, and wild phase particle injection rate is 20g/min, and implant angle is 30 ° ~ 70 °, and protection gas and line throughput are 5L/min; Laser head leans forward 5 ° along welding direction.Other is identical with detailed description of the invention one.
Detailed description of the invention ten: present embodiment and detailed description of the invention one unlike: the technological parameter of step 3 is: laser power is 1000W, and spot diameter is 1mm ~ 4mm, and speed of welding is 3mm/s; Powder feed rate is 3g/min, and powder feeding carrier gas flux is 2L/min, and wild phase particle injection rate is 3g/min, and implant angle is 30 ° ~ 70 °, and protection gas and line throughput are 5L/min; Laser head leans forward 5 ° along welding direction.Other is identical with detailed description of the invention one.
Detailed description of the invention 11: present embodiment and detailed description of the invention one unlike: described workpiece to be welded is metal-base composites, as aluminum matrix composite, magnesium base composite material, titanium matrix composite or nickel-base composite material etc.Other is identical with detailed description of the invention one.
Content of the present invention is not limited only to the content of the respective embodiments described above, and the combination of one of them or several detailed description of the invention equally also can realize the object of inventing.
Beneficial effect of the present invention is verified by following examples:
The Sip/LD11 composite material solid welding of laser powder-filled deposit weld method and the thick volume fraction 60% of method 1mm of the present invention is adopted to connect respectively.
Embodiment 1
Laser powder-filled deposit weld method is as follows:
80 × 40 × 1mm is become to Sip/LD11 composite processing to be welded
3, monolateral 30 ° of double V-grooves, by position to be welded polishing cleaning, gapless is fixing on the table.
Semiconductor laser selected by laser instrument, spot diameter 4mm, AlSi12 alloy powder and Si particle powder evenly made by 2:3 spheroidal graphite and mixes powder filler; Adopt domestic new loose monotubular powder feeder, send into position while welding with laser coaxial.Laser power 1200W, speed of welding 5mm/s, powder feed rate 5g/min, powder feeding carrier gas flux 10L/min, protection gas and line throughput are 5L/min.
Welding point metallographic and microstructure are as shown in Figures 2 and 3, visible, and joint macroscopic view is shaped better, there is undercut defect and a small amount of pore.Microstructure is mainly thicker block Si phase and a (Al) solid solution, and Si particle scaling loss is more serious.
Embodiment 2
A kind of laser deposition-synchronous the composite connecting method of molten note of the present embodiment, it carries out according to following steps:
Semiconductor laser selected by laser instrument, and powder feeder is bitubular powder feeder.After sheet material polishing cleaning to be welded, open monolateral 30 ° of double V-grooves, gapless is docked.Laser power 1200W, speed of welding 5mm/s, powder feed rate 5g/min, powder feeding carrier gas flux 8L/min, wild phase particle injection rate scope 4g/min, implant angle scope 50 °, protection gas and line throughput are 5L/min.
Coaxial powder feeding head is adopted to send into powder filler to position while welding, powder filler material is different according to the difference of material to be welded, as welded Si particle reinforce LD11 material, powder filler can be the mixed-powder of AlSi12 alloy powder and Si particle, also can be the mixed-powder of pure Al powder and Si particle, ratio as Al:Si alloy powder needs the ratio-dependent according to wild phase in mother metal, and in the present embodiment condition, Al:Si alloy powder ratio can be 2:3-1:2.Control the technological parameter that generating device of laser performs step 3, produce laser beam, under laser irradiation, melting powder forms molten bath; While the welding of coaxial feeding powder filler, in molten bath, inject wild phase particle Si particle at the rear portion in molten bath by paraxonic feeding head.
Laser deposition-synchronous composite connecting method of molten note is adopted to carry out the joint metallograph of Sip/LD11 composite plate weld and microstructure as Fig. 4 and Fig. 5
Shown in, visible, weld seam no significant defect, mother metal fusing amount is few, and interface is clear.Seam organization is the Si particle of a (Al) solid solution and Dispersed precipitate, compares laser powder-filled deposit weld microstructure more evenly fine and closely woven, reaches the result of anticipation.
Embodiment 3
A kind of laser deposition-synchronous the composite connecting method of molten note of the present embodiment, it carries out according to following steps:
Laser instrument selective light fibre laser, powder feeder is bitubular powder feeder.After sheet material polishing cleaning to be welded, open monolateral 30 ° of double V-grooves, gapless is docked.Laser power 2000W, speed of welding 10mm/s, powder feed rate 10g/min, powder feeding carrier gas flux 15L/min, wild phase particle injection rate scope 8g/min, implant angle scope 50 °, protection gas and line throughput are 5L/min.
Coaxial powder feeding head is adopted to send into powder filler to position while welding, powder filler material is different according to the difference of material to be welded, as welded Si particle reinforce LD11 material, powder filler can be the mixed-powder of AlSi12 alloy powder and Si particle, also can be the mixed-powder of pure Al powder and Si particle, ratio as Al:Si alloy powder needs the ratio-dependent according to wild phase in mother metal, and in this condition, Al:Si alloy powder ratio can be 2:3-1:2., control the technological parameter that generating device of laser performs step 3, produce laser beam, under laser irradiation, melting powder forms molten bath; While the welding of coaxial feeding powder filler, in molten bath, inject wild phase Si particle at the rear portion in molten bath by paraxonic feeding head.
Embodiment 4
A kind of laser deposition-synchronous the composite connecting method of molten note of the present embodiment, it carries out according to following steps:
Laser instrument selective light fibre laser, powder feeder is bitubular powder feeder.After sheet material polishing cleaning to be welded, open monolateral 30 ° of double V-grooves, gapless is docked.Laser power 5000W, speed of welding 5mm/s, powder feed rate 5g/min, powder feeding carrier gas flux 5L/min, wild phase particle injection rate scope 8g/min, implant angle scope 50 °, protection gas and line throughput are 5L/min.
Coaxial powder feeding head is adopted to send into powder filler powder filler material to position while welding different according to the difference of material to be welded, as welded Si particle reinforce LD11 material, powder filler can be the mixed-powder of AlSi12 alloy powder and Si particle, also can be the mixed-powder of pure Al powder and Si particle, ratio as Al:Si alloy powder needs the ratio-dependent according to wild phase in mother metal, in this condition, Al:Si alloy powder ratio can be 2:3-1:2.Control the technological parameter that generating device of laser performs step 3, produce laser beam, under laser irradiation, melting powder forms molten bath; While the welding of coaxial feeding powder filler, in molten bath, inject wild phase Si particle at the rear portion in molten bath by paraxonic feeding head.
Embodiment 5
A kind of laser deposition-synchronous the composite connecting method of molten note of the present embodiment, it carries out according to following steps:
Laser instrument selective light fibre laser, powder feeder is bitubular powder feeder.After sheet material polishing cleaning to be welded, open monolateral 30 ° of double V-grooves, gapless is docked.Laser power 4000W, speed of welding 15mm/s, powder feed rate 15g/min, powder feeding carrier gas flux 15L/min, wild phase particle injection rate scope 8g/min, implant angle scope 50 °, protection gas and line throughput are 5L/min.
Coaxial powder feeding head is adopted to send into powder filler powder filler material to position while welding different according to the difference of material to be welded, as welded Si particle reinforce LD11 material, powder filler can be the mixed-powder of AlSi12 alloy powder and Si particle, also can be the mixed-powder of pure Al powder and Si particle, ratio as Al:Si alloy powder needs the ratio-dependent according to wild phase in mother metal, in this condition, Al:Si alloy powder ratio can be 2:3-1:2.Control the technological parameter that generating device of laser performs step 3, produce laser beam, under laser irradiation, melting powder forms molten bath; While the welding of coaxial feeding powder filler, in molten bath, inject wild phase particulates reinforcements Si particle at the rear portion in molten bath by paraxonic feeding head.The method energy input controllable precise of above embodiment; Conveniently regulate material component; Flexibility is large, automaticity is high; Minimum feature size and heat input are only limited to minimum spot size.Most distinguishing feature is that wild phase adopts the method for molten note to be filled into rear, weld seam molten bath in addition, not with laser energy direct effect, can avoid wild phase particle scaling loss, wild phase is sent into from the rear, molten bath that temperature is lower simultaneously, effectively can suppress the dissolving of wild phase particle in liquid metal as far as possible.
Claims (10)
1. laser deposition-synchronous composite connecting method of molten note, is characterized in that it carries out according to following steps:
Step one: double V-groove is processed at the position to be welded of workpiece to be welded;
Step 2: groove and neighbouring surface of position are cleared up, polished, and with fixture, clamping workpiece to be welded is fixed on the table;
Step 3: install coaxial and paraxonic feeding head, welding condition is set:
Laser power is 600W ~ 5000W, and spot diameter is 1mm ~ 4mm, and speed of welding is 3mm/s ~ 15mm/s; Powder feed rate is 2g/min ~ 15g/min, and powder feeding carrier gas flux is 3L/min ~ 20L/min, and wild phase particle injection rate is 2g/min ~ 20g/min, and implant angle is 30 ° ~ 70 °, and protection gas and line throughput are 5L/min; Laser head leans forward 5 ° along welding direction;
Step 4: adopt coaxial powder feeding head to send into powder filler to position while welding, control the technological parameter that generating device of laser performs step 3, produce laser beam, under laser irradiation, melting powder forms molten bath;
Step 5: while the welding of coaxial feeding powder filler, inject wild phase particle at the rear portion in molten bath by paraxonic feeding head in molten bath, namely completes described laser deposition-synchronous composite joint of molten note.
2. a kind of laser deposition according to claim 1-synchronous composite connecting method of molten note, is characterized in that the laser instrument of Emission Lasers is semiconductor laser, CO
2gas laser, YAG solid state laser or optical fiber laser.
3. a kind of laser deposition according to claim 1-synchronous composite connecting method of molten note, is characterized in that the technological parameter of step 3 is: laser power is 800W ~ 5000W, and spot diameter is 1mm ~ 4mm, and speed of welding is 3mm/s ~ 15mm/s; Powder feed rate is 2g/min ~ 15g/min, and powder feeding carrier gas flux is 3L/min ~ 20L/min, and wild phase particle injection rate is 2g/min ~ 20g/min, and implant angle is 30 ° ~ 70 °, and protection gas and line throughput are 5L/min; Laser head leans forward 5 ° along welding direction.
4. a kind of laser deposition according to claim 2-synchronous composite connecting method of molten note, is characterized in that the technological parameter of step 3 is: laser power is 1000W ~ 5000W, and spot diameter is 1mm ~ 4mm, and speed of welding is 5mm/s ~ 15mm/s; Powder feed rate is 5g/min ~ 15g/min, and powder feeding carrier gas flux is 5L/min ~ 20L/min, and wild phase particle injection rate is 5g/min ~ 20g/min, and implant angle is 30 ° ~ 70 °, and protection gas and line throughput are 5L/min; Laser head leans forward 5 ° along welding direction.
5. a kind of laser deposition according to claim 4-synchronous composite connecting method of molten note, is characterized in that the technological parameter of step 3 is: laser power is 2000W ~ 5000W, and spot diameter is 1mm ~ 4mm, and speed of welding is 8mm/s ~ 15mm/s; Powder feed rate is 8g/min ~ 15g/min, and powder feeding carrier gas flux is 8L/min ~ 20L/min, and wild phase particle injection rate is 8g/min ~ 20g/min, and implant angle is 30 ° ~ 70 °, and protection gas and line throughput are 5L/min; Laser head leans forward 5 ° along welding direction.
6. a kind of laser deposition according to claim 5-synchronous composite connecting method of molten note, is characterized in that the technological parameter of step 3 is: laser power is 3000W ~ 5000W, and spot diameter is 1mm ~ 4mm, and speed of welding is 10mm/s ~ 15mm/s; Powder feed rate is 10g/min ~ 15g/min, and powder feeding carrier gas flux is 10L/min ~ 20L/min, and wild phase particle injection rate is 10g/min ~ 20g/min, and implant angle is 30 ° ~ 70 °, and protection gas and line throughput are 5L/min; Laser head leans forward 5 ° along welding direction.
7. a kind of laser deposition according to claim 6-synchronous composite connecting method of molten note, is characterized in that the technological parameter of step 3 is: laser power is 4000W ~ 5000W, and spot diameter is 1mm ~ 4mm, and speed of welding is 12mm/s ~ 15mm/s; Powder feed rate is 12g/min ~ 15g/min, and powder feeding carrier gas flux is 15L/min ~ 20L/min, and wild phase particle injection rate is 15g/min ~ 20g/min, and implant angle is 30 ° ~ 70 °, and protection gas and line throughput are 5L/min; Laser head leans forward 5 ° along welding direction.
8. a kind of laser deposition according to claim 7-synchronous composite connecting method of molten note, is characterized in that the technological parameter of step 3 is: laser power is 4500W, and spot diameter is 1mm ~ 4mm, and speed of welding is 10mm/s; Powder feed rate is 10g/min, and powder feeding carrier gas flux is 15L/min, and wild phase particle injection rate is 15g/min, and implant angle is 30 ° ~ 70 °, and protection gas and line throughput are 5L/min; Laser head leans forward 5 ° along welding direction.
9. a kind of laser deposition according to claim 8-synchronous composite connecting method of molten note, is characterized in that the technological parameter of step 3 is: laser power is 3000W, and spot diameter is 1mm ~ 4mm, and speed of welding is 15mm/s; Powder feed rate is 15g/min, and powder feeding carrier gas flux is 20L/min, and wild phase particle injection rate is 20g/min, and implant angle is 30 ° ~ 70 °, and protection gas and line throughput are 5L/min; Laser head leans forward 5 ° along welding direction.
10. a kind of laser deposition according to claim 9-synchronous composite connecting method of molten note, is characterized in that the technological parameter of step 3 is: laser power is 1000W, and spot diameter is 1mm ~ 4mm, and speed of welding is 3mm/s; Powder feed rate is 3g/min, and powder feeding carrier gas flux is 2L/min, and wild phase particle injection rate is 3g/min, and implant angle is 30 ° ~ 70 °, and protection gas and line throughput are 5L/min; Laser head leans forward 5 ° along welding direction.
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| CN201511027899.7A CN105397296B (en) | 2015-12-30 | 2015-12-30 | Laser deposition-melt injection synchronous compound connecting method |
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| CN201511027899.7A CN105397296B (en) | 2015-12-30 | 2015-12-30 | Laser deposition-melt injection synchronous compound connecting method |
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| CN105397296B CN105397296B (en) | 2017-04-26 |
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| CN109483071A (en) * | 2018-12-27 | 2019-03-19 | 长沙理工大学 | A kind of method of the big thickness plate of laser-agitating friction composite welding |
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| CN114147353A (en) * | 2021-12-01 | 2022-03-08 | 华东交通大学 | Laser powder filling welding method for SiCp/Al-based composite material |
| CN114273662A (en) * | 2021-12-19 | 2022-04-05 | 南京理工大学 | Laser deposition-based thick plate high-nitrogen steel connecting method |
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| CN114273662A (en) * | 2021-12-19 | 2022-04-05 | 南京理工大学 | Laser deposition-based thick plate high-nitrogen steel connecting method |
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