CN103480984B - A kind of 308 stainless flux-cored wires of low Cr VI discharge - Google Patents
A kind of 308 stainless flux-cored wires of low Cr VI discharge Download PDFInfo
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- CN103480984B CN103480984B CN201310438119.2A CN201310438119A CN103480984B CN 103480984 B CN103480984 B CN 103480984B CN 201310438119 A CN201310438119 A CN 201310438119A CN 103480984 B CN103480984 B CN 103480984B
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- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 53
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 53
- 238000003466 welding Methods 0.000 claims abstract description 41
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- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 14
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- 239000013078 crystal Substances 0.000 claims abstract description 13
- 239000010453 quartz Substances 0.000 claims abstract description 13
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 13
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052845 zircon Inorganic materials 0.000 claims abstract description 13
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims abstract description 13
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 claims abstract description 12
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- 229910052802 copper Inorganic materials 0.000 claims description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims description 5
- 239000011574 phosphorus Substances 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 2
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- 238000000034 method Methods 0.000 abstract description 11
- 239000011651 chromium Substances 0.000 description 82
- 239000002893 slag Substances 0.000 description 13
- 229910052799 carbon Inorganic materials 0.000 description 10
- 238000000137 annealing Methods 0.000 description 9
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 229910052804 chromium Inorganic materials 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
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- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
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- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 4
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- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
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- 231100000504 carcinogenesis Toxicity 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- FGCGALPUFOSDIE-UHFFFAOYSA-N chromium nickel Chemical compound [Cr][Ni][Cr] FGCGALPUFOSDIE-UHFFFAOYSA-N 0.000 description 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
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- 210000004185 liver Anatomy 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
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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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
-
- 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
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
- B23K35/3608—Titania or titanates
-
- 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
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/368—Selection of non-metallic compositions of core materials either alone or conjoint with selection of soldering or welding materials
-
- 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
- B23K35/406—Filled tubular wire or rods
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
A kind of 308 stainless flux-cored wires of low Cr VI discharge, it is made up of medicine core and external application steel band, it is characterized in that: described medicine core accounts for the 15%-30% of welding wire gross weight, and its Chinese medicine core respectively forms the percentage accounting for medicine core weight and is: hafnium metal powfer: 19-24.5%, metal nickel powder: 8-13%, electrolytic manganese metal 4-8%, aluminium powder: 1-4%, rutile: 20-30%, quartz: 4-8%, zircon sand: 3-8%, feldspar 3-5%, MnO
2: 2-6%, ice crystal: 1-2%, MFC additive: 1-5%, surplus is iron powder; Above-mentioned MFC additive comprises Zn:25-45%; Cu:5-15%; Si:2-10%; Polytetrafluoroethylene (PTFE): 15-30%, fluorographite: 1-5%; Li
2cO
3: 20-40%; After mechanical mixture, 200-300 DEG C need be heated to stir in electric furnace.The present invention develops a kind of low Cr VI (Cr
+ 6) discharge, 308 stainless flux-cored wires that welding procedure is excellent.
Description
Technical field
The present invention relates to and be applicable to welding 18%Cr-8%Ni stainless steel (SUS304, SUS304L etc.) field of welding material, particularly relate to the low Cr VI (Cr in weld fumes
+ 6) gas shielded 308 stainless flux-cored wire of content.
Background technology
Stainless flux-cored wire welding austenitic stainless steel has that efficiency is high, cost is low, automaticity is high, and processing performance is good, and appearance of weld is attractive in appearance; Deposition rate is fast, and production efficiency is high, and burn-off rate is fast, and its deposition rate is about the feature of 85%-90%, is the direction of stainless steel welded technical development.
In stainless steel, the content of Cr is higher, and welding material can add appropriate Cr element in order to the corrosion resistance meeting weld seam, makes weld seam produce enough corrosion resistances to meet property of welded joint requirement.In wlding and mother metal, Cr evaporate and enters weld fumes under welding high temperature action, wherein partly can be oxidized to the virose Cr VI (Cr of tool
+ 6).
Cr VI (Cr
+ 6) in human body, there is carcinogenesis, also can cause other many health problems, the hexavalent chromium compound as sucked some higher concentration can cause rhinorrhea, sneezes, itch, nosebleed, ulcer and perforation of nasal septum.The contact of short-term heavy dose, can produce adverse consequences in contact site, comprises ulcer, schneiderian membrance stimulates and perforation of nasal septum.Absorption over much dosage can cause the damage of kidney and liver, nauseating, GI irritation, gastric ulcer, spasm are even dead.Skin contact can cause ulcer or allergic reaction Cr VI (Cr
+ 6) be one of the easiest anaphylactic metal, be only second to nickel.In order to ensure the health of welding personnel, 2006 Occupational Safety and Health Administration of the U.S. (OSHA) newly promulgated Cr VI (Cr in weld fumes
+ 6) permission exposure limit value (PEL), be reduced to 3 μ g/m3 by 52 original μ g/m3 in 8 hours, and be recommended as 0.2 μ g/m further 2010
3.
For stainless flux-cored wire, reduce Cr VI (Cr
+ 6) stability of product, reduce the active oxygen around electric arc, improving arc stability is reduce Cr VI (Cr
+ 6) main path.Therefore, the present invention develops a kind of low Cr VI (Cr
+ 6) discharge, 308 stainless flux-cored wires that welding procedure is excellent.
Summary of the invention:
The present invention is formed in view of the foregoing, its object is to provide a kind of low Cr VI (Cr
+ 6) discharge capacity, 308 stainless flux-cored wires that welding procedure is outstanding.
To achieve these goals, the present invention is by the following technical solutions:
A kind of low Cr VI (Cr
+ 6) 308 stainless flux-cored wires that discharge, it is made up of medicine core and steel band, and described steel band is the austenic stainless steel belt that phosphorus content is less than 0.03% (weight), and the phosphorus content of described medicine core is not higher than 0.04% (weight).
Described medicine core accounts for the 15%-30% of welding wire gross weight, its Chinese medicine core respectively forms the percentage accounting for medicine core weight: hafnium metal powfer: 19-24.5%, metal nickel powder: 8-13%, electrolytic manganese metal 4-8%, aluminium powder: 1-4%, rutile: 20-30%, quartz: 4-8%, zircon sand: 3-8%, feldspar 3-5%, MnO
2: 2-6%, ice crystal: 1-2%, MFC additive: 1-5%, surplus is iron powder;
Above-mentioned MFC additive comprises Zn, Cu, Si, polytetrafluoroethylene (PTFE), fluorographite and Li
2cO
3, their weight ratio be followed successively by Zn:25 ?45%; Cu:5 ?15%; Si:2 ?10%; Polytetrafluoroethylene (PTFE): 15 ?30%, fluorographite: 1 ?5%; Li
2cO
3: 20 ?40%; And Zn powder: 80 ?120 orders, Cu powder: 120 ?200 orders, polytetrafluoroethylene powder 100 ?200 orders, fluorographite 100 ?200 orders, Li
2cO
3: 80 ?200 orders, after mechanical mixture, need be heated in electric furnace 200 ?300 DEG C stir.
Further, raw material are Zn:80-120 order, Cu:120-200 order, polytetrafluoroethylene (PTFE) (PTFE) 100 ?200 orders, fluorographite (CH
4f
2) 100-200 order, Li
2cO
3: 80-200 order, after mechanical mixture, need heat 200-300 DEG C, stir after taking out in electric furnace.
In deposited metal, the content of essential element is at following scope: C:0.021 ~ 0.06wt.%; Cr:18 ~ 21wt.%; Ni:9 ~ 11.0wt.%; Mn:0.5 ~ 2.5wt.%; Si:0.3 ~ 1wt.%; Fe: surplus.
308 stainless flux-cored wires are used in austenitic stainless steel welding as above, and wherein said external application steel band is preferably the austenic stainless steel belt that phosphorus content is less than 0.03% (weight).
308 stainless flux-cored wires are used in austenitic stainless steel welding as above, and the diameter of wherein said welding wire is preferably between 0.9-1.6mm.
One is used for being added in 308 stainless flux-cored wires and suppresses Cr VI (Cr
+ 6) additive that generates, it is by Zn-Cu-Si-polytetrafluoroethylene (PTFE) (PTFE)-fluorographite (CH
4f
2)-Li
2cO
3, their weight ratio is followed successively by 25-45%, 5-15%, 2-10%, 15-30%, 1-5%, 20-40%.And the granularity of additive is 80-160 order.
A kind of low Cr VI (Cr
+ 6) preparation method of discharge austenite 308 stainless flux-cored wire, step is as follows:
Step 1: according to the recipe configuration good medicine core powder of described medicine core, austenic stainless steel belt phosphorus content being less than 0.03% (weight) is bundled into U-shaped, adds the medicine core powder accounting for this welding wire gross weight 15-30% in U-lag;
After capable for U groove heals up by step 2, successively through forging, roll, the process of drawing tube reducing finally obtains welding wire;
Step 3 pair welding wire surface is cleared up, and obtains the final products of the stainless steel welded flux-cored wire of described austenite 308.
Beneficial effect of the present invention is:
Reduce Cr VI (Cr in stainless steel welded flue dust
+ 6) mainly solved by three approach.Method one: by the active material in additive, reduces the active oxygen (O around electric arc in welding process
3), reduction divalence, tetravalence chromium are oxidized to the probability of sexavalence.Method two: replace K, the Na in medicine core with the material in additive, make Cr VI (Cr
+ 6) not becoming stable thing phase, final automatic classifying becomes divalence, tetravalence chromium.Method three: in additive, dystectic material is to Cr VI (Cr
+ 6) there is reduction, reduce the Cr VI (Cr generated
+ 6) be called divalence, tetravalence material.The material that in the present invention, additive relates to is selected through a large amount of, and content is at 1-5%, and granularity, at 80-160 order, controls weight percent oxide in medicinal powder simultaneously and is less than 45%.
Low Cr VI (Cr of the present invention
+ 6) discharge austenite 308 stainless flux-cored wire can reduce 30-70% Cr VI (Cr in weld fumes
+ 6) content, the advantages such as have good processing performance, namely have arc stability high, spatter is few simultaneously, and the removability of slag is good.
The present invention is applicable to 100%CO
2gas shielded arc welding, quality of weld seam molding is good, the metallurgical imperfections such as pore-free, crackle, slag inclusion.In deposited metal, the content of essential element is in following scope: in deposited metal, the content of essential element is at following scope: C:0.021 ~ 0.03wt.%; Cr:18 ~ 21wt.%; Ni:9 ~ 11.0wt.%; Mn:0.5 ~ 2.5wt.%; Si:0.3 ~ 1wt.%; Fe: surplus, this welding wire is applicable to austenitic stainless steel welding, is particularly suitable for welding space little, uses, can reduce Cr VI (Cr under the not smooth environment that ventilates
+ 6) discharge, reduce Cr VI (Cr
+ 6) harm to human body.
Detailed description of the invention
Flux-cored wire of the present invention is by the restriction of following example, and any improvement in the scope that claim of the present invention is protected and change are all within protection scope of the present invention.
The invention provides a kind of low Cr VI (Cr
+ 6) discharge the thin diameter flux-cored wire of 308 stainless steel, it is made up of external application steel band and welding wire medicine core wherein, and its instantiation mode is as follows:
Described welding wire medicine core composed as follows:
Crome metal: transition chromium element in welding wire deposited metal, its weight percentage is (accounting for the weight percentage of medicinal powder, as follows) 19-24.5%.
Metallic nickel: transition nickel element in welding wire deposited metal, its weight percentage 8-13%%.
Electrolytic manganese metal: transition manganese element in welding wire deposited metal, its weight percentage is 4-8%.
Aluminium powder: play deoxidation, improve the transfer coefficient of the alloying elements such as chromium, nickel, manganese, its percentage by weight is: 1-4%.
Rutile: main slag former, can improve the removability of slag and the forming quality of weld metal, and can also improve the stability of electric arc, its percentage by weight is: 20-30% simultaneously.
Quartz: main slag former, increases the acidity of slag, the viscosity of adjustment slag and oxidisability, and refinement molten drop, improve fusing coefficient, but addition too much easily reduces quality of weld seam molding, its weight percentage is 4-8%.
Zircon sand: main slag former, the physical and chemical performance of adjustment slag, improves the removability of slag of weld metal, and improve fusing coefficient, its weight percent content is 3-8%.
Feldspar: for slag making, the physical and chemical performance of adjustment slag, can also play the effect of stable arc, refinement molten drop, but addition crosses conference increase Cr VI (Cr
+ 6) growing amount, its weight percentage is feldspar 3-5%.
Ice crystal: for dehydrogenation, improves arc performance, and increase the mobility of weld seam skull, its weight percentage is preferably 1-2%.
Additive: its function reduces the active oxygen around welding arc, suppresses Cr VI (Cr
+ 6) generate stable compound, the Cr VI (Cr that reduction has generated
+ 6), its percentage by weight is preferably 1-5%.
Described additive is by Zn-Cu-Si-polytetrafluoroethylene (PTFE) (PTFE)-fluorographite (CH
4f
2)-Li
2cO
3, their weight ratio is followed successively by 25-45%, 5-15%, 2-10%, 15-30%, 1-5%, 20-40% and the granularity of additive is 80-160 order.
Cr VI (Cr in weld fumes is affected in stainless flux-cored wire
+ 6) active oxygen of factor mainly around electric arc of content, its main source is the oxide in medicinal powder.Next is the compound of K, Na, and it can make Cr VI (Cr
+ 6) generate stable compound.Deoxidier in general welding wire is that Al, Mg are still due to its oxidized temperature and Cr VI (Cr
+ 6) temperature that generates is not in same scope, therefore, Al, Mg are to Cr VI (Cr in weld fumes
+ 6) content impact little.MFC additive of the present invention, by Zn-Cu-Si-polytetrafluoroethylene (PTFE) (PTFE)-fluorographite (CH
4f
2)-Li
2cO
3, their weight ratio is followed successively by Zn:25-45%; Cu:5-15%; : Si:2-10%; Polytetrafluoroethylene (PTFE) (PTFE): 15-30%, fluorographite (CH
4f
2): 1-5%; Li
2cO
3: 20-40%.Raw material are Zn powder: 80-120 order, Cu powder: 120-200 order, polytetrafluoroethylene (PTFE) (PTFE) powder, fluorographite (CH
4f
2) 100-200 order, Li
2cO
3: 80-200 order, after mechanical mixture, 200-300 DEG C need be heated in electric furnace, polytetrafluoroethylene (PTFE) (PTFE) is melted, taking-up needs to stir, and after stirring, polytetrafluoroethylene (PTFE) (PTFE) to be attached on other particle it and both to have included and be reduced in Cr VI (Cr
+ 6) when generating, the material of the active oxygen around electric arc, suppress Cr VI (Cr
+ 6) generate the material of stable compound and include again the Cr VI (Cr that reduction generated
+ 6) species.Final arrival reduces 30-70% Cr VI (Cr
+ 6) object.The advantages such as have good processing performance, namely have arc stability high, spatter is few simultaneously, and the removability of slag is good.
The manufacture of 308 stainless flux-cored wires of the present invention adopts following steps:
1) by thickness 0.25-0.6mm, the low-carbon austenitic band of width 8-12mm is bundled into U-shaped, adds the medicinal powder accounting for welding wire gross weight 15-30% of the present invention in U-lag.
2) after being healed up by capable for U groove, by roll forming, drawing tube reducing, its diameter is finally made to reach between 0.9-1.6mm.
3) welding wire surface is cleared up, obtain final products.
Embodiment 1
Select thickness 0.25mm, width 8mm, weight are the low-carbon austenitic band of 5666g, are bundled into U-shaped, by 190g hafnium metal powfer, 80g metal nickel powder, 40g electrolytic manganese metal, 40g aluminium powder, 300g rutile, 80g quartz, 80g zircon sand, 30g feldspar, 20gMnO
2, 10g ice crystal, 10g additive (Zn:2.5g; Cu:1.5; : Si:1g; Polytetrafluoroethylene (PTFE): 2g, fluorographite: 0.5g; Li
2cO
3: 2.5g), 110g iron powder, altogether 1000g medicinal powder, add after mixing in U-type groove, filling rate is 15% (weight), heals up through tube reducing, bright annealing, again tube reducing, and final finished gage of wire is 0.9mm.
Embodiment 2
Select thickness 0.4mm, width 12mm, weight are the low-carbon austenitic band of 4000g, are bundled into U-shaped, by 245g hafnium metal powfer, 130g metal nickel powder, 80g electrolytic manganese metal, 10g aluminium powder, 200g rutile, 40g quartz, 30g zircon sand, 50g feldspar, 60gMnO
2, 20g ice crystal, 50g additive (Zn:12.5g; Cu:5; : Si:5g; Polytetrafluoroethylene (PTFE): 10g, fluorographite: 2.5g; Li
2cO
3: 15g), 85g iron powder, altogether 1000g medicinal powder, add after mixing in U-type groove, filling rate is 20% (weight), heals up through tube reducing, bright annealing, again tube reducing, and final finished gage of wire is 0.9mm.
Embodiment 3
Select thickness 0.3mm, width 8mm, weight are the low-carbon austenitic band of 3546g, are bundled into U-shaped, by 245g hafnium metal powfer, 130g metal nickel powder, 80g electrolytic manganese metal, 10g aluminium powder, 200g rutile, 40g quartz, 30g zircon sand, 50g feldspar, 60gMnO
2, 20g ice crystal, 50g additive (Zn:20g; Cu:7.5; : Si:1g; Polytetrafluoroethylene (PTFE): 9g, fluorographite: 2.5g; Li
2cO
3: 10g), 85g iron powder, altogether 1000g medicinal powder, add after mixing in U-type groove, filling rate is 22% (weight), heals up through tube reducing, bright annealing, again tube reducing, and final finished gage of wire is 1.2mm.
Embodiment 4
Select thickness 0.4mm, width 10mm, weight are the low-carbon austenitic band of 3000g, are bundled into U-shaped, by 190g hafnium metal powfer, 80g metal nickel powder, 40g electrolytic manganese metal, 40g aluminium powder, 300g rutile, 80g quartz, 80g zircon sand, 30g feldspar, 20gMnO
2, 10g ice crystal, 10g additive (Zn:3g; Cu:1; : Si:1g; Polytetrafluoroethylene (PTFE): 3g, fluorographite: 0.5g; Li
2cO
3: 1.5g), 140g iron powder, altogether 1000g medicinal powder, add after mixing in U-type groove, filling rate is 25% (weight), heals up through tube reducing, bright annealing, again tube reducing, and final finished gage of wire is 1.6mm.
Embodiment 5
Select thickness 0.6mm, width 12mm, weight are the low-carbon austenitic band of 2333g, are bundled into U-shaped, by 200g hafnium metal powfer, 90g metal nickel powder, 50g electrolytic manganese metal, 20g aluminium powder, 220g rutile, 50g quartz, 50g zircon sand, 40g feldspar, 30gMnO
2, 15g ice crystal, 30g additive (Zn:6.6g; Cu:3.9; : Si:3g; Polytetrafluoroethylene (PTFE): 6g, fluorographite: 1.5g; Li
2cO
3: 6g), 205g iron powder, altogether 1000g medicinal powder, add after mixing in U-type groove, filling rate is 30% (weight), heals up through tube reducing, bright annealing, again tube reducing, and final finished gage of wire is 1.6mm.
Embodiment 6
Select thickness 0.4mm, width 10mm, weight are the low-carbon austenitic band of 4263g, are bundled into U-shaped, by 230g hafnium metal powfer, 90g metal nickel powder, 50g electrolytic manganese metal, 30g aluminium powder, 230g rutile, 55g quartz, 40g zircon sand, 35g feldspar, 40gMnO
2, 17g ice crystal, 40g additive (Zn:12.8g; Cu:6; : Si:3.2g; Polytetrafluoroethylene (PTFE): 8g, fluorographite: 2g; Li
2cO
3: 8g), 143g iron powder, altogether 1000g medicinal powder, add after mixing in U-type groove, filling rate is 19% (weight), heals up through tube reducing, bright annealing, again tube reducing, and final finished gage of wire is 0.9mm.
Comparative example 1
Select thickness 0.4mm, width 10mm, weight are the low-carbon austenitic band of 3167g, are bundled into U-shaped, by 210g hafnium metal powfer, 95g metal nickel powder, 53g electrolytic manganese metal, 24g aluminium powder, 230g rutile, 50g quartz, 20g zircon sand, 60g feldspar, 30gMnO
2, 15g ice crystal, 0g additive, 213g iron powder, altogether 1000g medicinal powder, add after mixing in U-type groove, filling rate is 24% (weight), heals up through tube reducing, bright annealing, again tube reducing, and final finished gage of wire is 1.6mm.
Comparative example 2
Select thickness 0.3mm, width 8mm, weight are the low-carbon austenitic band of 3762g, are bundled into U-shaped, by 230g hafnium metal powfer, and 85g metal nickel powder, 52g electrolytic manganese metal, 24g aluminium powder, 230g rutile, 60g quartz, 20g zircon sand, 60g feldspar, 30gMnO
2, 25g ice crystal, 2g additive (Zn:0.25g; Cu:0.1; : Si:0.1g; Polytetrafluoroethylene (PTFE): 0.2g, fluorographite: 0.5g; Li
2cO
3: 0.3g), 172g iron powder, altogether 1000g medicinal powder, add after mixing in U-type groove, filling rate is 21% (weight), heals up through tube reducing, bright annealing, again tube reducing, and final finished gage of wire is 1.2mm.
Comparative example 3
Select thickness 0.3mm, width 8mm, weight are the low-carbon austenitic band of 4882g, are bundled into U-shaped, by 210g hafnium metal powfer, and 86g metal nickel powder, 50g electrolytic manganese metal, 14g aluminium powder, 240g rutile, 50g quartz, 20g zircon sand, 60g feldspar, 30gMnO
2, 15g ice crystal, 60g additive (Zn:13.2g; Cu:7.8; : Si:6g; Polytetrafluoroethylene (PTFE): 12g, fluorographite: 3g; Li
2cO
3: 12g), 165g iron powder, altogether 1000g medicinal powder, add after mixing in U-type groove, filling rate is 17% (weight), heals up through tube reducing, bright annealing, again tube reducing, and final finished gage of wire is 0.9mm.
To the evaluation of each embodiment and comparative example performance
1. Cr VI (Cr in weld fumes
+ 6) content
Air-suction cover in flue dust collecting device can 360 degree of rotations, in flexible inhalation arm, universal joint is housed, signature can be gone up, all around move, sucked by soot dust granule material, then collected in measurement unit's time below weld fumes weight 1.5g/min is excellent, is greater than 1.5g/min for poor, Cr (VI) content according to the standard detection every kilogram flue dust of ISO16740, its result in Table 1.Metewand is with content 1.6-1.8 × 10 of traditional 308 stainless flux-cored wires
3mg/Kg, when lower than 1.5 × 10
3during mg/Kg be " excellent, be greater than 1.3 × 10
3during mg/Kg be " poor ".
2. (mechanical property)
Tensile strength, 0 DEG C of absorption energy (toughness) is evaluated based on GB/T17853-1999.Its result is displayed in Table 3.The metewand of tensile strength be more than 550MPa 640MPa once time for " excellent: Ο " is lower than 550MPa or more than being " poor " during 640MPa.In addition, evaluate based on GB/T17853-1999.Elongation is higher than 30% for " excellence " according to metewand, lower than 30% time be " poor "
3. ferrite number
Survey number instrument with ferrite to measure with reference to the ferrite content of division lines method to sample in GB/T1954-2008 " chromiumnickel austenite stainless steel weld seam ferrite content measuring method ".For ensure measurement result statistically and reasonability, covering the welded seam area within melt run to each sample, random selecting 20 visual fields measure, and get the mean value of 20 measurement results as final tested volume, its result is in table 3.Metewand be ferrite number FN when 5%-12% for " excellence ", lower than 5% or higher than 12% time be " poor "
4. welding wire spatter loss coefficient
Spatter loss coefficient assessment method adopts semiclosed case to collect splashing, test test piece for welding (size
300 × 30 × 20mm, Q235 carbon steel sheet) be placed on testing stand, lose, with leading for preventing from splashing
Electrolytic copper cover is covered, welding in copper cover; Carry out being welded on test plate (panel) with automatic welding carriage
Welding is about the weld seam of 250mm together, and postwelding collects the splashing metal in copper cover on testing stand
Particle, claims its weight, and its result in table 3.Metewand is be " excellence " below 0.5%,
Higher than 0.5% time be " poor ".
Spatter loss coefficient ψ computing formula is as follows:
M in formula
2-splashing weight (g);
M
1-welding wire expendable weight (g).
5. overall merit
As overall merit, welding operation (Cr in arc stability, spatter loss coefficient, flue dust
+ 6content) and deposited metal performance (hot strength, ballistic work, FN number) all meets " excellent " time be evaluated as ⊙, even if when having any one project appraisal for difference, overall merit is also ×.
The low Cr of table 1
+ 6, low cost stainless steel metal core 308 evaluation result
As shown in table 1, embodiment 1-6 is low Cr VI Cr
+ 6discharge 308 stainless flux-cored wires, its medicine core composition meets scope of the present invention so comprehensive performance evaluation is " excellent ", and comparative example 1-3 does not meet scope of the present invention, and wherein 1,2 additive levels are low, make Cr VI (Cr in weld fumes
+ 6) do not reach qualified, the additive of No. 3 is too high, and the splashing of welding wire is increased, and therefore comprehensive performance evaluation is defective.
Claims (3)
1. 308 stainless flux-cored wires of low Cr VI discharge, it is made up of medicine core and external application steel band, and described medicine core accounts for the 15%-30% of welding wire gross weight, and described external application steel band is the austenic stainless steel belt that phosphorus content is less than 0.03%wt;
It is characterized in that: its Chinese medicine core respectively forms the percentage accounting for medicine core weight and is: hafnium metal powfer: 19-24.5%, metal nickel powder: 8-13%, electrolytic manganese metal 4-8%, aluminium powder: 1-4%, rutile: 20-30%, quartz: 4-8%, zircon sand: 3-8%, feldspar 3-5%, MnO
2: 2-6%, ice crystal: 1-2%, MFC additive: 1-5%, surplus is iron powder;
Above-mentioned MFC additive comprises Zn, Cu, Si, polytetrafluoroethylene (PTFE), fluorographite and Li
2cO
3, their weight ratio is followed successively by Zn:25-45%; Cu:5-15%; Si:2-10%; Polytetrafluoroethylene (PTFE): 15-30%, fluorographite: 1-5%; Li
2cO
3: 20-40%; After mechanical mixture, 200-300 DEG C need be heated to stir in electric furnace.
2. 308 stainless flux-cored wires of low Cr VI discharge as claimed in claim 1, the diameter of wherein said welding wire is between 0.9-1.6mm.
3. 308 stainless flux-cored wires of low Cr VI discharge as claimed in claim 1, Zn:80-120 order in described MFC additive, Cu:120-200 order, polytetrafluoroethylene (PTFE) 100-200 order, fluorographite 100-200 order, Li
2cO
3: 80-200 order.
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| US10646965B2 (en) * | 2015-08-11 | 2020-05-12 | Hobart Brothers Llc | Tubular welding wire with a thinner sheath for improved deposition rates |
| CN106141486B (en) * | 2016-08-08 | 2019-10-08 | 泉州联合新材料科技有限公司 | A kind of CO2Gas shielded stainless flux-cored wire |
| CN106514040B (en) * | 2016-11-04 | 2019-07-26 | 四川大西洋焊接材料股份有限公司 | A kind of gas shielded stainless flux-cored wire and its production technology for boiler-burner |
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| GB1030326A (en) * | 1963-09-17 | 1966-05-18 | Murex Welding Processes Ltd | Improvements in arc welding electrodes |
| CN101966628A (en) * | 2010-09-27 | 2011-02-09 | 中国船舶重工集团公司第七二五研究所 | Chemical powder components of 2507 type super double-phase stainless steel flux-cored wire |
| CN102229029A (en) * | 2011-05-30 | 2011-11-02 | 中冶焊接科技有限公司 | Flux-cored wire for austenitic stainless steel all-position welding |
| CN102909490A (en) * | 2012-11-09 | 2013-02-06 | 高金菊 | Flux-cored wire for welding austenitic stainless steel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU1780970C (en) * | 1990-08-21 | 1992-12-15 | Всесоюзный научно-исследовательский институт по строительству магистральных трубопроводов | Flux-cored welding electrode |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1030326A (en) * | 1963-09-17 | 1966-05-18 | Murex Welding Processes Ltd | Improvements in arc welding electrodes |
| CN101966628A (en) * | 2010-09-27 | 2011-02-09 | 中国船舶重工集团公司第七二五研究所 | Chemical powder components of 2507 type super double-phase stainless steel flux-cored wire |
| CN102229029A (en) * | 2011-05-30 | 2011-11-02 | 中冶焊接科技有限公司 | Flux-cored wire for austenitic stainless steel all-position welding |
| CN102909490A (en) * | 2012-11-09 | 2013-02-06 | 高金菊 | Flux-cored wire for welding austenitic stainless steel |
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Effective date of registration: 20220701 Address after: 265500 No. 2, Wuhan street, Yantai Development Zone, Yantai area, Yantai pilot Free Trade Zone, Shandong Province Patentee after: Shandong high entropy Metal Technology Co.,Ltd. Address before: 100124 No. 100 Chaoyang District Ping Tian Park, Beijing Patentee before: Beijing University of Technology |
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