CN104759724A - Welding method for heating and connecting over-length hard alloy by using laser - Google Patents
Welding method for heating and connecting over-length hard alloy by using laser Download PDFInfo
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- CN104759724A CN104759724A CN201510227429.9A CN201510227429A CN104759724A CN 104759724 A CN104759724 A CN 104759724A CN 201510227429 A CN201510227429 A CN 201510227429A CN 104759724 A CN104759724 A CN 104759724A
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 110
- 239000000956 alloy Substances 0.000 title claims abstract description 110
- 238000003466 welding Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000010438 heat treatment Methods 0.000 title claims abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 149
- 239000002245 particle Substances 0.000 claims abstract description 33
- 238000000498 ball milling Methods 0.000 claims abstract description 22
- 238000004093 laser heating Methods 0.000 claims abstract description 19
- 150000001875 compounds Chemical class 0.000 claims abstract description 12
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 6
- 238000005498 polishing Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 56
- 238000012856 packing Methods 0.000 claims description 33
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 20
- 238000001035 drying Methods 0.000 claims description 15
- 239000007789 gas Substances 0.000 claims description 15
- 229910000679 solder Inorganic materials 0.000 claims description 15
- 239000007921 spray Substances 0.000 claims description 15
- 238000002360 preparation method Methods 0.000 claims description 11
- 238000005507 spraying Methods 0.000 claims description 11
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- 229910052786 argon Inorganic materials 0.000 claims description 10
- 229910052804 chromium Inorganic materials 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 10
- 244000137852 Petrea volubilis Species 0.000 claims description 5
- 238000005275 alloying Methods 0.000 claims description 5
- 238000005422 blasting Methods 0.000 claims description 5
- 230000001413 cellular effect Effects 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 229910052593 corundum Inorganic materials 0.000 claims description 5
- 239000010431 corundum Substances 0.000 claims description 5
- 239000001307 helium Substances 0.000 claims description 5
- 229910052734 helium Inorganic materials 0.000 claims description 5
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000005215 recombination Methods 0.000 claims description 5
- 230000006798 recombination Effects 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 5
- 229910052721 tungsten Inorganic materials 0.000 claims description 5
- 229910052725 zinc Inorganic materials 0.000 claims description 5
- 239000000470 constituent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 abstract description 3
- 239000011229 interlayer Substances 0.000 abstract 2
- 238000005270 abrasive blasting Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 6
- 239000002023 wood Substances 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
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- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 239000011195 cermet Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
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- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
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- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
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- 239000003870 refractory metal Substances 0.000 description 1
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- 229910052723 transition metal Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/005—Soldering by means of radiant energy
- B23K1/0056—Soldering by means of radiant energy soldering by means of beams, e.g. lasers, E.B.
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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- Materials Engineering (AREA)
- Powder Metallurgy (AREA)
- Laser Beam Processing (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention relates to a welding method for heating and connecting over-length hard alloy by using a laser. The welding method for heating and connecting the over-length hard alloy by using the laser comprises the following steps that firstly, 200-mesh alloy powder and compound powder ranging from 20 meshes to 30 meshes are selected as filling metal, the alloy powder comprises Cu powder, Zn powder, Ni powder, Co powder, Cr powder, B powder, Fe powder and W powder, the compound powder is WC powder, and a mass fraction of the WC particles ranges from 0.1% to 10%; secondly, a ball-milling ball, the WC particles and the alloy powder are put in a ball milling machine, and even mixing is carried out; thirdly, a groove with a dip angle ranging from 1 degree to 5 degrees is cut in the welding face of the hard alloy; fourthly, after the welding face of the hard alloy is polished, cleaned and dried, abrasive blasting and coating are carried out; fifthly, polishing and cleaning are carried out on a Ni piece and a Co piece which range from 0.1 mm to 0.2 mm, coinciding and assembling are carried out according to the sequence of Ni/Co/Ni, and an interlayer is formed; sixthly, clamping is carried out on coated hard alloy, the interlayer is fixed between the two hard alloy, and laser heating is carried out. According to the method, the residual stress of the hard alloy and hard alloy welding connectors can be notably lowered, and the weld strength is high.
Description
Technical field
The present invention relates to the solder technology between carbide alloy and carbide alloy, be specifically related to use LASER HEATING to connect the welding method of overlength carbide alloy.
Background technology
Along with the progress of timber industry technology, various composite wooden material, thick china, wood, bamboo wood, especially the material such as melamine impregnated paper wainscot plate, PVC thick china is more and more for furniture, floor, roof boarding and engineered wood product etc.But these timber need layered cutting to process, conventional cutting process, simple cutter structure and common cutter material are difficult to competent or cannot realize machining at all.It is fast that hard alloy cutter has cutting speed, and working (machining) efficiency is high, and anti-wear performance is good, the advantage of long service life, has become timber industry and has processed first-selected cutter.Because the original size of its processing wood materials is all comparatively large, corresponding process tool size is also thereupon elongated.But carbide alloy take refractory metal compound as matrix, take magnesium-yttrium-transition metal as Binder Phase, the cermet tool material prepared by powder metallurgy process, this preparation method just limits the Hardmetal materials of the long size of more difficult production, in order to obtain long size (being greater than 2 meters) hard alloy cutter, what solder technology must be used to realize between carbide alloy with carbide alloy is reliably connected.
Mainly there is two problems about carbide alloy with welding of carbide alloy, become the bottleneck of restriction overlength carbide alloy welding.This two problems is respectively: choosing of one packing material.If select common packing material, its material hardness, wearability compared with carbide alloy is often mutually far short of what is expected, and first packing material can wear and tear at work, can leave convex epirelief like this on its processing wood materials, affect the quality of product, product time serious, can be made to use; There is very large difference in the thermal coefficient of expansion of its two packing material and this bi-material of carbide alloy, this can cause producing larger residual stress in welding process, cause carbide alloy welding point position gross distortion, hard alloy cutter welding point will be caused first to occur crackle until finally cracked in the processing of follow-up wood materials.
Laser is as a kind of novel welding heat source, have that firing rate is fast, heat affected area is narrow, post welding distortion and the feature such as residual stress is little, particularly weaken joint fusion area brittle in, have unique advantage, this makes it likely be applied to welding of carbide alloy and carbide alloy.According to pertinent literature, " deep penetration welding " of laser and " thermal conductance weldering " pattern can be taked to carry out the soldering of carbide alloy and steel, this method can make solder in instantaneous interior abundant fusing, to infiltrate carbide alloy, hard alloy substrate can be heated to again higher temperature and unlikely fusing, can better soak by liquid solder, formed soldered fitting.But only have studied welding of carbide alloy and steel in pertinent literature, and carbide alloy and carbide alloy to weld difficulty larger, with high content of technology, so still belong to blank in the solder technology of the long size carbide alloy of this high-quality of China and carbide alloy, there is no the substantial report of this respect so far abroad yet.
Summary of the invention
The object of this invention is to provide the welding method using LASER HEATING to connect overlength carbide alloy, the welding method that this use LASER HEATING connects overlength carbide alloy is welded into the problem of super long workpiece for solving carbide alloy and carbide alloy.
The technical solution adopted for the present invention to solve the technical problems is: the welding method that this use LASER HEATING connects overlength carbide alloy is as follows:
One, packing material preparation:
200 order alloy powders and 20 ~ 30 order compound powders are chosen as filling metal by mass fraction, alloy powder comprises Cu powder, Zn powder, Ni powder, Co powder, Cr powder, B powder, Fe powder, W powder, compound powder is WC particle, in the gross mass of alloy powder and WC particle, the mass fraction of WC particle is 0.1% ~ 10%;
Two, packing material alloying:
The WC particle taken in ball milling ball, step one is put into planetary ball mill together with the alloy powder taken in step one, packing material powder is mixed with WC particle, ball milling bulb diameter is 2 ~ 10mm, ball material mass ratio is 9:1 ~ 14:1, argon gas is filled with after planetary ball mill vacuumizes, then be 50 ~ 400r/min batch (-type) ball milling, 4 ~ 22h with rotating speed, the every 6 ~ 11min of ball mill changes a rotation direction, and every ball milling 2 ~ 5h rests 0.6 ~ 1.1h;
Three, carbide alloy processing:
When carbide alloy prepares, first carbide alloy solder side is cut out the groove at about 1 ~ 5 ° of inclination angle with Linear cut, and cutter trade is removed in polishing;
Four, surface recombination:
By the carbide alloy solder side after step 3 process through with sand papering, with acetone cleaning, after drying, use 24 order corundum sands to carry out blasting treatment; Then spray, sprayed on material powder morphology is spherical in shape or subsphaeroidal, particle size range is 44 ~ 105 μm, spraying parameter is: voltage 30 ~ 60V, electric current 200 ~ 500A, argon flow amount 30 ~ 45L/min, powder sending quantity 1 ~ 2.5kg/h, spray distance 80 ~ 120mm, spray layer thickness about 200 ~ 900 μm; Heat-treat in holding furnace after spraying, wherein heat treatment parameter is: 200 ~ 700 DEG C of insulation 0.6 ~ 1h, air cooling;
Five, intermediate layer preparation:
Adopt sand paper to polish to the thick Ni sheet of 0.1 ~ 0.2mm and Co sheet, and after cleaning-drying, carry out superimposed assembling according to the order of Ni/Co/Ni, form the intermediate layer of sandwich formats;
Six, welding process:
Carbide alloy step 4 sprayed carries out clamping; and the intermediate layer of step 5 being prepared is fixed in the middle of two carbide alloy; carry out LASER HEATING subsequently, wherein packing material will carry out drying, then scrapes suction powder feeder and four cellular type coaxial powder-feeding nozzles by balancing point and realizes coaxially sending packing material; laser welding process is: laser power is 3 ~ 6kW; spot diameter 1 ~ 1.5mm, defocusing amount is 1 ~ 8mm, and bonding speed is 10 ~ 25mm/s; protective gas is helium, and gas flow is 32L/min.
The consisting of of alloy powder in such scheme: in the gross mass of alloy powder and WC particle, alloy powder is by being 10% ~ 60%Cu powder, 10% ~ 40%Zn powder, 1% ~ 70%Ni powder, 1% ~ 10%Co powder, 1% ~ 10%Cr powder, 0.1% ~ 10%B powder, 0.1% ~ 10%Fe powder, 1% ~ 20%W powder constituent by mass fraction.
In such scheme, sprayed on material by by mass fraction is: the Ni of 15% ~ 20%Cr, 3.0% ~ 4.5%B, 3.5% ~ 5.5%Si, 0.5% ~ 1.1%C, 0.5% ~ 5.0%Fe, surplus forms.
The present invention has following beneficial effect:
One, in the present invention, intermediate layer and packing material, with the use of the residual stress that significantly can reduce carbide alloy and carbide alloy welding point, improve weld strength, improve the performance of whole hard alloy component.
Two, packing material WC wild phase in mechanical milling process that prepared by the present invention can full and uniformly mix with brazing filler metal alloy powder.
Three, the present invention directly can obtain the composite weld that WC particle strengthens when welding, and the residual stress of joint also can be made significantly to decline.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
In figure: 1. carbide alloy, 2. sprayed coating, 3. packing material, 4. laser beam, 5. fixture.
Detailed description of the invention
The present invention is further illustrated below:
Embodiment 1:
The welding method that this use LASER HEATING connects overlength carbide alloy is as follows:
One, packing material preparation:
Choose 200 order alloy powders and 20 order compound powders as filling metal by mass fraction, its alloy powder comprises Cu powder, Zn powder, Ni powder, Co powder, Cr powder, B powder, Fe powder, W powder, and compound powder is WC particle; 10%Cu powder, 40%Zn powder, 10%Ni powder, 1%Co powder, 1%Cr powder, 7.9%B powder, 10%Fe powder, 20%W powder is taken by mass fraction, and 0.1%WC particle.
Two, packing material alloying:
The WC particle taken in ball milling ball, step one is put into planetary ball mill together with the alloy powder taken in step one, packing material powder is mixed with WC particle, ball milling bulb diameter is 2mm, ball material mass ratio is 9:1, argon gas is filled with after planetary ball mill vacuumizes, then be 50r/min batch (-type) ball milling 4h with rotating speed, the every 6min of ball mill changes a rotation direction, and every ball milling 2h rests 0.6h; In the present invention, ball material mass ratio is the quality sum of both alloy powders that takes in the WC particle that takes in step one and step one and the ratio of ball mill ball quality.
Three, carbide alloy processing:
When carbide alloy prepares, first carbide alloy solder side is cut out the groove at about 1 ~ 5 ° of inclination angle with Linear cut, and cutter trade is removed in polishing.
Four, surface recombination:
By the carbide alloy solder side after step 3 process through with sand papering, with acetone cleaning, after drying, use 24 order corundum sands to carry out blasting treatment; Then spray, sprayed on material by by mass fraction is: the Ni of 15%Cr, 3.0%B, 5.5%Si, 0.8%C, 0.7%Fe, surplus forms, powder morphology is spherical in shape or subsphaeroidal, particle size range is 44 μm, and spraying parameter is: voltage 30V, electric current 200A, argon flow amount 30L/min, powder sending quantity 1kg/h, spray distance 80mm, spray layer thickness about 200 μm; Heat-treat in holding furnace after spraying, wherein heat treatment parameter is: 200 DEG C of insulation 0.6h, air cooling.
Five, intermediate layer preparation:
Adopt sand paper to polish to the thick Ni sheet of 0.1mm and Co sheet, and after cleaning-drying, carry out superimposed assembling according to the order of Ni/Co/Ni, form the intermediate layer of sandwich formats.
Six, welding process:
As shown in Figure 1, carbide alloy step 4 sprayed carries out clamping, by the corresponding placement of sprayed coating 2 after two carbide alloy sprayings, clamp with fixture 5, and the intermediate layer of step 5 being prepared is fixed in the middle of two carbide alloy 1, intermediate layer is the white portion in Fig. 1 between two sprayed coatings, carry out LASER HEATING subsequently, wherein packing material will carry out drying, then scrape suction powder feeder and four cellular type coaxial powder-feeding nozzles by balancing point to realize coaxially sending packing material, laser beam 4 enters into two carbide alloy through packing material 3 and carries out LASER HEATING, laser welding process is: laser power is 3kW, spot diameter 1mm, defocusing amount is 3mm, bonding speed is 10mm/s, protective gas is helium, gas flow is 32L/min.
Embodiment 2:
The welding method that this use LASER HEATING connects overlength carbide alloy is as follows:
One, packing material preparation:
Choose 200 order alloy powders and 30 order compound powders as filling metal by mass fraction, its alloy powder comprises Cu powder, Zn powder, Ni powder, Co powder, Cr powder, B powder, Fe powder, W powder, and compound powder is WC particle; 58%Cu powder, 10%Zn powder, %Ni powder, 8%8Co powder, 9%Cr powder, 0.1%B powder, 0.9%Fe powder, 1%W powder is taken by mass fraction, and 8%WC particle.
Two, packing material alloying:
The WC particle taken in ball milling ball, step one is put into planetary ball mill together with the alloy powder taken in step one; packing material powder is mixed with WC particle; ball milling bulb diameter is 8mm; ball material mass ratio is 12:1; argon gas is filled with after planetary ball mill vacuumizes; then be 200r/min batch (-type) ball milling 18h with rotating speed, the every 8min of ball mill changes a rotation direction, and every ball milling 3h rests 0.9h.
Three, carbide alloy processing:
When carbide alloy prepares, first carbide alloy solder side is cut out the groove at about 1 ~ 5 ° of inclination angle with Linear cut, and cutter trade is removed in polishing.
Four, surface recombination:
By the carbide alloy solder side after step 3 process through with sand papering, with acetone cleaning, after drying, use 24 order corundum sands to carry out blasting treatment; Then spray, sprayed on material by by mass fraction is: the Ni of 20%Cr, 4.5%B, 3.5%Si, 0.5%C, 5.0%Fe, surplus forms, powder morphology is spherical in shape or subsphaeroidal, particle size range is 85 μm, and spraying parameter is: voltage 45V, electric current 300A, argon flow amount 40L/min, powder sending quantity 1.5kg/h, spray distance 100mm, spray layer thickness about 600 μm; Heat-treat in holding furnace after spraying, wherein heat treatment parameter is: 500 DEG C of insulation 0.9h, air cooling.
Five, intermediate layer preparation:
Adopt sand paper to polish to the thick Ni sheet of 0.2mm and Co sheet, and after cleaning-drying, carry out superimposed assembling according to the order of Ni/Co/Ni, form the intermediate layer of sandwich formats.
Six, welding process:
Carbide alloy step 4 sprayed carries out clamping; and the intermediate layer of step 5 being prepared is fixed in the middle of two carbide alloy; carry out LASER HEATING subsequently, wherein packing material will carry out drying, then scrapes suction powder feeder and four cellular type coaxial powder-feeding nozzles by balancing point and realizes coaxially sending packing material; laser welding process is: laser power is 4kW; spot diameter 1.2mm, defocusing amount is 5mm, and bonding speed is 18mm/s; protective gas is helium, and gas flow is 32L/min.
Embodiment 3:
The welding method that this use LASER HEATING connects overlength carbide alloy is as follows:
One, packing material preparation:
Choose 200 order alloy powders and 30 order compound powders as filling metal by mass fraction, its alloy powder comprises Cu powder, Zn powder, Ni powder, Co powder, Cr powder, B powder, Fe powder, W powder, and compound powder is WC particle; 10%Cu powder, 10%Zn powder, 70%Ni powder, 2%Co powder, 2%Cr powder, 2%B powder, 1%Fe powder, 2%W powder is taken by mass fraction, and 1%WC particle;
Two, packing material alloying:
The WC particle taken in ball milling ball, step one is put into planetary ball mill together with the alloy powder taken in step one, packing material powder is mixed with WC particle, ball milling bulb diameter is 10mm, ball material mass ratio is 14:1, argon gas is filled with after planetary ball mill vacuumizes, then be 400r/min batch (-type) ball milling 22h with rotating speed, the every 11min of ball mill changes a rotation direction, and every ball milling 5h rests 1.1h;
Three, carbide alloy processing:
When carbide alloy prepares, first carbide alloy solder side is cut out the groove at about 1 ~ 5 ° of inclination angle with Linear cut, and cutter trade is removed in polishing;
Four, surface recombination:
By the carbide alloy solder side after step 3 process through with sand papering, with acetone cleaning, after drying, use 24 order corundum sands to carry out blasting treatment; Then spray, sprayed on material by by mass fraction is: the Ni of 18%Cr, 4.0%4B, 4.5%Si, 0.8%C, 3%Fe, surplus forms, powder morphology is spherical in shape or subsphaeroidal, particle size range is 105 μm, and spraying parameter is: voltage 60V, electric current 500A, argon flow amount 45L/min, powder sending quantity 2.5kg/h, spray distance 120mm, spray layer thickness about 900 μm; Heat-treat in holding furnace after spraying, wherein heat treatment parameter is: 700 DEG C of insulation 1h, air cooling;
Five, intermediate layer preparation:
Adopt sand paper to polish to the thick Ni sheet of 0.1mm and Co sheet, and after cleaning-drying, carry out superimposed assembling according to the order of Ni/Co/Ni, form the intermediate layer of sandwich formats;
Six, welding process:
Carbide alloy step 4 sprayed carries out clamping; and the intermediate layer of step 5 being prepared is fixed in the middle of two carbide alloy; carry out LASER HEATING subsequently, wherein packing material will carry out drying, then scrapes suction powder feeder and four cellular type coaxial powder-feeding nozzles by balancing point and realizes coaxially sending packing material; laser welding process is: laser power is 6kW; spot diameter 1.5mm, defocusing amount is 8mm, and bonding speed is 25mm/s; protective gas is helium, and gas flow is 32L/min.
Claims (3)
1. use LASER HEATING to connect a welding method for overlength carbide alloy, it is characterized in that: the welding method that this use LASER HEATING connects overlength carbide alloy is as follows:
One, packing material preparation:
200 order alloy powders and 20 ~ 30 order compound powders are chosen as filling metal by mass fraction, alloy powder comprises Cu powder, Zn powder, Ni powder, Co powder, Cr powder, B powder, Fe powder, W powder, compound powder is WC particle, in the gross mass of alloy powder and WC particle, the mass fraction of WC particle is 0.1% ~ 10%;
Two, packing material alloying:
The WC particle taken in ball milling ball, step one is put into planetary ball mill together with the alloy powder taken in step one, packing material powder is mixed with WC particle, ball milling bulb diameter is 2 ~ 10mm, ball material mass ratio is 9:1 ~ 14:1, argon gas is filled with after planetary ball mill vacuumizes, then be 50 ~ 400r/min batch (-type) ball milling, 4 ~ 22h with rotating speed, the every 6 ~ 11min of ball mill changes a rotation direction, and every ball milling 2 ~ 5h rests 0.6 ~ 1.1h;
Three, carbide alloy processing:
When carbide alloy prepares, first carbide alloy solder side is cut out the groove at about 1 ~ 5 ° of inclination angle with Linear cut, and cutter trade is removed in polishing;
Four, surface recombination:
By the carbide alloy solder side after step 3 process through with sand papering, with acetone cleaning, after drying, use 24 order corundum sands to carry out blasting treatment; Then spray, sprayed on material powder morphology is spherical in shape or subsphaeroidal, particle size range is 44 ~ 105 μm, spraying parameter is: voltage 30 ~ 60V, electric current 200 ~ 500A, argon flow amount 30 ~ 45L/min, powder sending quantity 1 ~ 2.5kg/h, spray distance 80 ~ 120mm, spray layer thickness about 200 ~ 900 μm; Heat-treat in holding furnace after spraying, wherein heat treatment parameter is: 200 ~ 700 DEG C of insulation 0.6 ~ 1h, air cooling;
Five, intermediate layer preparation:
Adopt sand paper to polish to the thick Ni sheet of 0.1 ~ 0.2mm and Co sheet, and after cleaning-drying, carry out superimposed assembling according to the order of Ni/Co/Ni, form the intermediate layer of sandwich formats;
Six, welding process:
Carbide alloy step 4 sprayed carries out clamping; and the intermediate layer of step 5 being prepared is fixed in the middle of two carbide alloy; carry out LASER HEATING subsequently, wherein packing material will carry out drying, then scrapes suction powder feeder and four cellular type coaxial powder-feeding nozzles by balancing point and realizes coaxially sending packing material; laser welding process is: laser power is 3 ~ 6kW; spot diameter 1 ~ 1.5mm, defocusing amount is 1 ~ 8mm, and bonding speed is 10 ~ 25mm/s; protective gas is helium, and gas flow is 32L/min.
2. use LASER HEATING according to claim 1 connects the welding method of overlength carbide alloy, it is characterized in that: consisting of of described alloy powder: in the gross mass of alloy powder and WC particle, alloy powder is by being 10% ~ 60%Cu powder, 10% ~ 40%Zn powder, 1% ~ 70%Ni powder, 1% ~ 10%Co powder, 1% ~ 10%Cr powder, 0.1% ~ 10%B powder, 0.1% ~ 10%Fe powder, 1% ~ 20%W powder constituent by mass fraction.
3. use LASER HEATING according to claim 1 and 2 connects the welding method of overlength carbide alloy, it is characterized in that: described sprayed on material by by mass fraction is: the Ni of 15% ~ 20%Cr, 3.0% ~ 4.5%B, 3.5% ~ 5.5%Si, 0.5% ~ 1.1%C, 0.5% ~ 5.0%Fe, surplus forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510227429.9A CN104759724B (en) | 2015-05-07 | 2015-05-07 | Welding method for heating and connecting over-length hard alloy by using laser |
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| CN201510227429.9A CN104759724B (en) | 2015-05-07 | 2015-05-07 | Welding method for heating and connecting over-length hard alloy by using laser |
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| CN104759724A true CN104759724A (en) | 2015-07-08 |
| CN104759724B CN104759724B (en) | 2017-01-18 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN109604829A (en) * | 2018-12-25 | 2019-04-12 | 常州中车通用电气柴油机有限公司 | Diesel engine of locomotive booster nozzle ring laser repair welding device and its repair welding method |
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| CN109048034A (en) * | 2018-08-24 | 2018-12-21 | 江苏大学 | The device and method of laser-impact welding metal foil plate based on automatic spraying middle layer |
| CN109604829A (en) * | 2018-12-25 | 2019-04-12 | 常州中车通用电气柴油机有限公司 | Diesel engine of locomotive booster nozzle ring laser repair welding device and its repair welding method |
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| CN104759724B (en) | 2017-01-18 |
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