CN105215580A - A kind of E309L stainless steel that can be used for big current welding adds Long Welding rod - Google Patents
A kind of E309L stainless steel that can be used for big current welding adds Long Welding rod Download PDFInfo
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- CN105215580A CN105215580A CN201510782465.1A CN201510782465A CN105215580A CN 105215580 A CN105215580 A CN 105215580A CN 201510782465 A CN201510782465 A CN 201510782465A CN 105215580 A CN105215580 A CN 105215580A
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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
- 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
- B23K35/365—Selection of non-metallic compositions of coating materials either alone or conjoint with selection of soldering or welding materials
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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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
- B23K35/0272—Rods, electrodes, wires with more than one layer of coating or sheathing material
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Abstract
A kind of E309L stainless steel that can be used for big current welding adds Long Welding rod, coating contains marble, fluorite, rutile, dehydration potassic feldspar, dehydration mica, bismuth oxide, chrome green, magnetic iron ore, soda ash, chromic carbide iron, electrolytic manganese metal, zircon sand, potassium fluoroaluminate, rare earth fluoride, crome metal and metallic nickel, undertaken blending and stirring by the proportioning of coating, add the potassium-sodium water glass of 15 ~ 20% according to coating gross weight and stir, then coating and ER308L welding wire are placed on hydraulic type electrode extrusion press to carry out production and can prepare and add Long Welding rod, do not have coating to ftracture and redness phenomenon when the big current of 170 ~ 180A and core wire length are 450mm, although core wire adopts ER308L, but make deposited metal composition meet the requirement of E309L chemical composition by the mode of covering transition alloy, therefore there is good welding usability, arc stability during welding, easy to operate, appearance of weld is good, de-slag is easy.
Description
Technical field
The invention belongs to technical field of welding materials, especially a kind of E309L stainless steel that can be used for big current welding adds Long Welding rod.
Background technology
Pressure vessel is widely used in petrochemical industry, nuclear power, thermoelectricity, the fields such as chemical industry, generally all needs to bear HTHP.The welding of internal pressure vessel walls generally adopts the pole built-up welding of large area austenic stainless steel belt, but adopts general welding rod to weld when joint, flange and place in irregular shape or faults repair repair welding.
The built-up welding of austenic stainless steel belt pole adopts the stainless steel electrodes such as 309L, 308L, 316L or 347L type usually, and wherein 309L is buttering welding rod, and the length of this welding rod is generally at 350 ~ 400mm.But in actual welding operating mode, welder is in order to finish the work as early as possible, many times adopt the big current welding exceeding code requirement, easily occur when being especially welded to the afterbody of welding rod that its coating is rubescent, welding rod afterbody problems of crack, can not weld again and cause welding rod to waste.
About the E309L stainless steel electrode implementing big current welding yet there are no relevant report.
Summary of the invention
For solving the problem, the invention provides the E309L stainless steel electrode of a kind of energy big current welding, the length of this welding rod can reach 450mm, can apply the big current welding of 170 ~ 180A, de-slag is easy, arc stability, coating is not rubescent, welding rod afterbody does not ftracture, and appearance of weld is good, can be applicable to the built-up welding welding of pressure petrochemical industry container inner wall transition zone.
For achieving the above object, the present invention adopts following technical scheme:
A kind of E309L stainless steel that can be used for big current welding adds Long Welding rod, this adds Long Welding rod and is made up of core wire and coating, wherein core wire adopts ER308L welding wire, containing calcite and fluorite, rutile, dehydration potassic feldspar, dehydration mica, bismuth oxide, chrome green, magnetic iron ore, soda ash, chromic carbide iron, electrolytic manganese metal, zircon sand, potassium fluoroaluminate, rare earth fluoride, crome metal and metallic nickel in coating, the binding agent that coating uses is potassium-sodium water glass, this is added Long Welding rod preparation and is produced by hydraulic type electrode extrusion press, and feature of the present invention is:
The cut to lengthen of ER308L welding wire is at 450mm;
Coating proportioning all is by weight: marble: 10 ~ 12; Fluorite: 8 ~ 10; Rutile: 30 ~ 35; Dehydration potassic feldspar: 15 ~ 20; Dehydration mica: 1 ~ 2; Bismuth oxide: 0.1 ~ 0.4; Chrome green: 3 ~ 5; Magnetic iron ore: 2 ~ 3; Soda ash: 0.3 ~ 0.5; Chromic carbide iron: 3 ~ 4; Electrolytic manganese metal: 3 ~ 4; Zircon sand: 1 ~ 2; Potassium fluoroaluminate: 0.3 ~ 0.5; Rare earth fluoride: 0.3 ~ 0.5; Crome metal: 10 ~ 12; Metallic nickel: 5 ~ 8;
Undertaken blending and stirring by the proportioning of coating, add the potassium-sodium water glass of 15 ~ 20% according to the gross weight of coating and stir, the coating stirred and ER308L welding wire are placed on hydraulic type electrode extrusion press to carry out production and can prepare and add Long Welding rod, this adds Long Welding rod Chinese medicine skin chemical composition wt% after testing and must meet: C≤0.04, Si≤1.0, Cr:22.0 ~ 25.0, Mn:0.50 ~ 2.50, Cu≤0.75, Ni:12.0 ~ 14.0, Mo≤0.50, S≤0.030, P≤0.040, Fe surplus; This adds Long Welding rod and allows the Current Control applied at 170 ~ 180A after testing;
The chemical composition wt% of above-mentioned ER308L welding wire requires: C≤0.03, Mn:1.0 ~ 2.5, Si:0.3 ~ 0.65, S≤0.03, P≤0.03, Cr:19.5 ~ 22.0, Ni:9.0 ~ 11.0;
The chemical composition wt% of above-mentioned potassium-sodium water glass requires: Na
2o+K
2o>=12, SiO
2>=25, S≤0.005, P≤0.005, the modulus of potassium-sodium water glass requires it is 2.4 and its Baume degrees requires it is 46 ~ 48 °;
Above-mentioned marmorean chemical composition wt% requires: CaCO
3>=98.0, S≤0.010, P≤0.010, requires that marmorean Task-size Controlling is at 60 orders;
The chemical composition wt% of above-mentioned fluorite requires: CaF
2>=95.0, SiO
2≤ 1.00, S≤0.010, P≤0.010, requires that the Task-size Controlling of fluorite is at 60 orders;
The chemical composition wt% of above-mentioned rutile requires: TiO
2>=95.0, S≤0.010, P≤0.010, requires that the Task-size Controlling of rutile is at 60 orders;
The chemical composition wt% of above-mentioned dehydration potassic feldspar requires: Na
2o+K
2o>=12, SiO
2: 63 ~ 73, Al
2o
3: 15 ~ 24, S≤0.04, P≤0.04, requires that the Task-size Controlling of dehydration potassic feldspar is at 120 orders;
The chemical composition wt% of above-mentioned dehydration mica requires: Na
2o+K
2o>=7, SiO
2: 45 ~ 55, Al
2o
3: 25 ~ 35, S≤0.03, P≤0.04, requires that the Task-size Controlling of dehydration mica is at 40 orders;
The chemical composition wt% of above-mentioned bismuth oxide requires: Bi
2o
3> 99.9, requires that the Task-size Controlling of bismuth oxide is at 120 orders;
The chemical composition wt% of above-mentioned chrome green requires: Cr
2o
3>=95.0, S≤0.04, P≤0.04, requires that the Task-size Controlling of chrome green is at 200 orders;
The chemical composition wt% of above-mentioned magnetic iron ore requires: Fe
3o
4>=97.0, S≤0.050, P≤0.050, requires that the Task-size Controlling of magnetic iron ore is at 60 orders;
The chemical composition wt% of above-mentioned soda ash requires: Na
2cO
3>=98.0, require that the Task-size Controlling of soda ash is at 40 orders;
The chemical composition wt% of above-mentioned chromic carbide iron requires: Cr:60 ~ 70, S≤0.03, P≤0.03, and C≤0.03, requires that the Task-size Controlling of chromic carbide iron is at 60 orders;
The chemical composition wt% of above-mentioned electrolytic manganese metal requires: Mn >=99.8, S≤0.04, and P≤0.04, requires that the Task-size Controlling of electrolytic manganese metal is at 60 orders;
The chemical composition wt% of above-mentioned zircon sand requires: ZrO
2>=60, SiO
2>=32, S≤0.05, P≤0.22, requires that the Task-size Controlling of zircon sand is at 80 orders;
Above-mentioned potassium fluoroaluminate K
3alF
6chemical composition wt% require be: F:48 ~ 53, AL:15 ~ 20, K:25 ~ 33, S≤0.05, P≤0.005, requires potassium fluoroaluminate K
3alF
6task-size Controlling at 60 orders;
The chemical composition wt% of above-mentioned rare earth fluoride requires: CeO
2/ REO>=45, F>=26, require that the Task-size Controlling of rare earth fluoride is at 100 orders;
The chemical composition wt% of above-mentioned crome metal requires: Cr >=99.0, C≤0.020, S≤0.010, and P≤0.010, requires that the Task-size Controlling of crome metal is at 60 orders;
The chemical composition wt% of above-mentioned metallic nickel requires: Ni=99.4, S≤0.010, P≤0.010, requires that the Task-size Controlling of metallic nickel is at 60 orders.
Owing to adopting technical scheme described above, the present invention produces following good effect:
1) stainless steel of the present invention adds Long Welding rod and has good welding usability, arc stability during welding, and easy to operate, appearance of weld is good, and de-slag is easy.
2) to add its anti-rubescent and anti-coating cracking performance of Long Welding rod good for stainless steel of the present invention, do not have coating cracking and redness phenomenon when the big current of 170 ~ 180A and core wire length are 450mm.
3) after 690 DEG C × 22h heat treatment, its side bend test and Huey test testing result qualified.
4) stainless steel of the present invention adds Long Welding rod and can be used for all-position welding.
Detailed description of the invention
Stainless steel of the present invention adds Long Welding rod and belongs to acidic electrode, wherein marble, fluorite, zircon sand, dehydration potassic feldspar, and rutile etc. are slag former, and chrome green and magnetic iron ore can strengthen the oxidisability of welding rod and reduce hydrogen dividing potential drop and improve weld blowhole tendency, potassium fluoroaluminate K
3alF
6can dehydrogenation eliminate hydrogen blistering with rare earth fluoride, hafnium metal powfer can to transition chromium element in deposited metal, metal nickel powder can to transition nickel element in deposited metal, electrolytic manganese metal can also to transition manganese element in deposited metal except having deoxidation, desulfidation, and chromic carbide iron, electrolytic manganese metal can ensure the degree of purity of weld(ing) deposit as deoxidier.
Rutile can improve the removability of slag and the Forming Quality of weld metal as main slag former simultaneously, and can improve arc stability.
Zircon sand, as main slag former, can adjust the physical and chemical performance of slag, improves the removability of slag of weld metal, improves fusing fusing point.There is chemical change in the zirconium dioxide especially in zircon sand, cause the change of slag thermal coefficient of expansion in welding process, is very beneficial for the de-slag of weld metal.
Bismuth oxide also can improve the removability of slag of weld metal.
Rutile, dehydration potassic feldspar, dehydration mica, marble, soda ash all has stabilising arc effect, can improve welding usability.Wherein rutile, dehydration potassic feldspar, dehydration mica have promotion molten drop flux-wall guided transfer, reduce the effect of coating temperature rise tearing tendency.
According to described technical scheme, three kinds of weight of coating see the following form.
By upper table proportioning, coating is blent, then add the potassium-sodium water glass of 15 ~ 20% again according to the gross weight of coating and stir, the coating stirred and ER308L welding wire are placed on hydraulic type electrode extrusion press and carry out production and can prepare and add Long Welding rod.
The three kinds of stainless steels prepared by upper table add Long Welding rod and carry out deposited metal composition analysis and mechanical property test, test plate (panel) groove, size, sampling method and position are all carried out according to standard GB/T/T983-2012 " stainless steel electrode ", welding conditions are for Φ 4.0mm welding rod: DC reverse connection, welding current 170 ~ 180A, temperature between the preheating of 150 DEG C and road, heat-treats according to the system of 690 DEG C × 22h after having welded in incubator again.
The deposited metal main chemical compositions wt% reference value of three embodiments sees the following form.
Fe surplus in upper table.
Need to draw attention to: although the present invention adopts is ER308L core wire, make deposited metal composition meet the chemical composition requirement of E309L by the mode of covering transition alloy, therefore the present invention is just called E309L stainless steel and adds Long Welding rod.
The deposited metal mechanical property reference value of three embodiments sees the following form.
Deposited metal lateral bending and Huey test is carried out according to national standard " GBT2653-2008 welding point bend test method " and " the corrosion stainless steel intercrystalline corrosion test method of GBT4334-2008 metal and alloy ", its result of the test is all qualified, meets the demands.
Claims (1)
1. the E309L stainless steel that can be used for big current welding adds Long Welding rod, this adds Long Welding rod and is made up of core wire and coating, wherein core wire adopts ER308L welding wire, containing calcite and fluorite, rutile, dehydration potassic feldspar, dehydration mica, bismuth oxide, chrome green, magnetic iron ore, soda ash, chromic carbide iron, electrolytic manganese metal, zircon sand, potassium fluoroaluminate, rare earth fluoride, crome metal and metallic nickel in coating, the binding agent that coating uses is potassium-sodium water glass, this is added Long Welding rod preparation and is produced by hydraulic type electrode extrusion press, it is characterized in that:
The cut to lengthen of ER308L welding wire is at 450mm;
Coating proportioning all is by weight: marble: 10 ~ 12; Fluorite: 8 ~ 10; Rutile: 30 ~ 35; Dehydration potassic feldspar: 15 ~ 20; Dehydration mica: 1 ~ 2; Bismuth oxide: 0.1 ~ 0.4; Chrome green: 3 ~ 5; Magnetic iron ore: 2 ~ 3; Soda ash: 0.3 ~ 0.5; Chromic carbide iron: 3 ~ 4; Electrolytic manganese metal: 3 ~ 4; Zircon sand: 1 ~ 2; Potassium fluoroaluminate: 0.3 ~ 0.5; Rare earth fluoride: 0.3 ~ 0.5; Crome metal: 10 ~ 12; Metallic nickel: 5 ~ 8;
Undertaken blending and stirring by the proportioning of coating, add the potassium-sodium water glass of 15 ~ 20% according to the gross weight of coating and stir, the coating stirred and ER308L welding wire are placed on hydraulic type electrode extrusion press to carry out production and can prepare and add Long Welding rod, this adds Long Welding rod Chinese medicine skin chemical composition wt% after testing and must meet: C≤0.04, Si≤1.0, Cr:22.0 ~ 25.0, Mn:0.50 ~ 2.50, Cu≤0.75, Ni:12.0 ~ 14.0, Mo≤0.50, S≤0.030, P≤0.040, Fe surplus; This adds Long Welding rod and allows the Current Control applied at 170 ~ 180A after testing;
The chemical composition wt% of above-mentioned ER308L welding wire requires: C≤0.03, Mn:1.0 ~ 2.5, Si:0.3 ~ 0.65, S≤0.03, P≤0.03, Cr:19.5 ~ 22.0, Ni:9.0 ~ 11.0;
The chemical composition wt% of above-mentioned potassium-sodium water glass requires: Na
2o+K
2o>=12, SiO
2>=25, S≤0.005, P≤0.005, the modulus of potassium-sodium water glass requires it is 2.4 and its Baume degrees requires it is 46 ~ 48 °;
Above-mentioned marmorean chemical composition wt% requires: CaCO
3>=98.0, S≤0.010, P≤0.010, requires that marmorean Task-size Controlling is at 60 orders;
The chemical composition wt% of above-mentioned fluorite requires: CaF
2>=95.0, SiO
2≤ 1.00, S≤0.010, P≤0.010, requires that the Task-size Controlling of fluorite is at 60 orders;
The chemical composition wt% of above-mentioned rutile requires: TiO
2>=95.0, S≤0.010, P≤0.010, requires that the Task-size Controlling of rutile is at 60 orders;
The chemical composition wt% of above-mentioned dehydration potassic feldspar requires: Na
2o+K
2o>=12, SiO
2: 63 ~ 73, Al
2o
3: 15 ~ 24, S≤0.04, P≤0.04, requires that the Task-size Controlling of dehydration potassic feldspar is at 120 orders;
The chemical composition wt% of above-mentioned dehydration mica requires: Na
2o+K
2o>=7, SiO
2: 45 ~ 55, Al
2o
3: 25 ~ 35, S≤0.03, P≤0.04, requires that the Task-size Controlling of dehydration mica is at 40 orders;
The chemical composition wt% of above-mentioned bismuth oxide requires: Bi
2o
3> 99.9, requires that the Task-size Controlling of bismuth oxide is at 120 orders;
The chemical composition wt% of above-mentioned chrome green requires: Cr
2o
3>=95.0, S≤0.04, P≤0.04, requires that the Task-size Controlling of chrome green is at 200 orders;
The chemical composition wt% of above-mentioned magnetic iron ore requires: Fe
3o
4>=97.0, S≤0.050, P≤0.050, requires that the Task-size Controlling of magnetic iron ore is at 60 orders;
The chemical composition wt% of above-mentioned soda ash requires: Na
2cO
3>=98.0, require that the Task-size Controlling of soda ash is at 40 orders;
The chemical composition wt% of above-mentioned chromic carbide iron requires: Cr:60 ~ 70, S≤0.03, P≤0.03, and C≤0.03, requires that the Task-size Controlling of chromic carbide iron is at 60 orders;
The chemical composition wt% of above-mentioned electrolytic manganese metal requires: Mn >=99.8, S≤0.04, and P≤0.04, requires that the Task-size Controlling of electrolytic manganese metal is at 60 orders;
The chemical composition wt% of above-mentioned zircon sand requires: ZrO
2>=60, SiO
2>=32, S≤0.05, P≤0.22, requires that the Task-size Controlling of zircon sand is at 80 orders;
Above-mentioned potassium fluoroaluminate K
3alF
6chemical composition wt% require be: F:48 ~ 53, AL:15 ~ 20, K:25 ~ 33, S≤0.05, P≤0.005, requires potassium fluoroaluminate K
3alF
6task-size Controlling at 60 orders;
The chemical composition wt% of above-mentioned rare earth fluoride requires: CeO
2/ REO>=45, F>=26, require that the Task-size Controlling of rare earth fluoride is at 100 orders;
The chemical composition wt% of above-mentioned crome metal requires: Cr >=99.0, C≤0.020, S≤0.010, and P≤0.010, requires that the Task-size Controlling of crome metal is at 60 orders;
The chemical composition wt% of above-mentioned metallic nickel requires: Ni=99.4, S≤0.010, P≤0.010, requires that the Task-size Controlling of metallic nickel is at 60 orders.
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