CN110369908A - The excellent SA-508Gr.4N steel all position welding hydrogen controlled electrode of low-temperature impact toughness - Google Patents
The excellent SA-508Gr.4N steel all position welding hydrogen controlled electrode of low-temperature impact toughness Download PDFInfo
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- CN110369908A CN110369908A CN201910769078.2A CN201910769078A CN110369908A CN 110369908 A CN110369908 A CN 110369908A CN 201910769078 A CN201910769078 A CN 201910769078A CN 110369908 A CN110369908 A CN 110369908A
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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
-
- 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
- B23K35/3073—Fe as the principal constituent with Mn 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
- B23K35/3602—Carbonates, basic oxides or hydroxides
-
- 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
Abstract
The excellent SA-508Gr.4N steel all position welding hydrogen controlled electrode of low-temperature impact toughness, it is related to technical field of welding materials.It solves the problems, such as SA-508Gr.4N steel hydrogen controlled electrode, and there are low-temperature impact toughness difference and unsuitable all-position weldings.Welding rod: it includes core wire and coating；Core wire group becomes the Fe of C, Si, Mn, S, P and surplus；Coating includes powder and binder；Powder group becomes marble, fluorite, strontium carbonate, titanium dioxide, quartz, yttrium base ferrosilicon, ferrotianium, electrolytic manganese, mid-carbon fe-mn, nickel powder, soda ash and potassium alginate.When welding rod of the invention has excellent all-position welding processing performance, especially vertical position welding and overhead welding, arc stability, splashing is small, sleeve is moderate, and uniformly, welding bead beautiful appearance, welder's operability is good for coating fusing, has ideal mechanical property.Welding rod of the invention is suitable for the all-position welding of SA-508Gr.4N steel.
Description
Technical field
The present invention relates to technical field of welding materials.
Background technique
As reactor pressure vessel develops to enlargement and integrated direction, third generation SA-508Gr.3 steel is difficult to ensure
Structural homogenity and stability on special thickness section, in consideration of it, new one with higher harden ability, intensity and plasticity and toughness
For material SA-508Gr.4N steel by the extensive concern in engineering.
The ingredient of SA-508Gr.4N steel reduces C, Mn and contains by improving Ni, Cr content on the basis of SA-508Gr.3 steel
Amount, reaches more preferably mechanical property.The reduction of Mn content can reduce the segregation of material, reduce temper brittleness sensibility；Ni,Cr
The raising of content can increase the harden ability of material, while the raising of Ni content can also effectively improve intensity and low temperature is tough
Property.Engineer application has certain requirement, 725~895MPa of tensile strength, elongation of having no progeny to the mechanical property of SA-508Gr.4N steel
Rate >=16%, -30 DEG C of impact absorbing energy average value >=48J.
Reactor pressure vessel welding procedure mainly uses narrow-clearance submerged arc welding and welding electrode arc welding.In design and SA-
508Gr.4N steel, on the one hand by adding a variety of carbonate, controls the ratio of carbonate and fluoride, improves with when applying welding rod
The all positon craftsmanship of welding rod.On the other hand, deposited metal composition is close with base material as far as possible, with guarantee and strength of parent etc.
Grade matches；The size and distribution for improving Second Phase Particles by addition heavy rare earth element, improve the low-temperature impact of weld metal
Toughness changes simultaneously liquid state of molten pool metallic surface property, reduces the diffusible hydrogen content of weld metal, reduces welding point cold cracking
Line sensibility.
Application No. is disclose a seed nucleus in the patent of 201810555476.X " nuclear power AG728 steel electrode and preparation method "
The electric mating welding rod of AG728 steel is suitble to vertical-up welding, welding rod deposited metal mechanics after 595~620 DEG C × 12h30min heat treatment
Function admirable, room temperature tensile intensity >=655MPa, -30 DEG C of impact >=54J.The patent " one of patent No. ZL201310528893.2
Kind of carbon steel covered electrode for nuclear power carbon steel welding and preparation method carbon steel and preparation method " in disclose and a kind of welded for third-generation nuclear power technology welding with carbon steel
Item and preparation method, all positon good operation performance, welding rod deposited metal mechanics after 595~625 DEG C × 1h, 16h, 40h heat treatment
Function admirable, room temperature tensile intensity are 510~630MPa, -30 DEG C of impact >=40J.Application No. is 201010121440.4 it is special
A kind of and AP1000 type pressure is disclosed in sharp " nuclear power special welding rod matched with steel plate with AP1000 type presurized water reactor containment "
The water-water reactor containment matched nuclear power special welding rod of SA-738Grade B steel plate, the welding rod can carry out all-position welding.Mesh
It is preceding still excellent without low-temperature impact toughness, it is suitble to the open report of the mating welding rod of SA-508Gr.4N steel of all-position welding.
Summary of the invention
The purpose of the present invention is to solve current SA-508Gr.4N steel hydrogen controlled electrode, that there are low-temperature impact toughness is poor
And the problem of unsuitable all-position welding, and it is low to provide the excellent SA-508Gr.4N steel all position welding of low-temperature impact toughness
Hydrogen type welding rod.
The excellent SA-508Gr.4N steel all position welding hydrogen controlled electrode of low-temperature impact toughness, it includes core wire and coating；
The core wire according to weight percent group become C≤0.04%, Si≤0.015%, Mn≤0.50%, S≤0.004%, P≤
0.008% and surplus Fe；The coating includes powder and binder；The powder according to weight percent group become 30%~
42% marble, 20%~30% fluorite, 4%~10% strontium carbonate, 3%~8% titanium dioxide, 2%~7% stone
English, 1%~3% yttrium base ferrosilicon, 4%~8% ferrotianium, 3%~7% electrolytic manganese, 3%~6% mid-carbon fe-mn, 3%
~10% nickel powder, 0.5%~1% soda ash and 0.5%~1% potassium alginate；
The consumption of binder is the 25% of powder weight；
The binder is potassium-sodium water glass.
Advantages of the present invention is as follows:
Low-temperature impact toughness excellent SA-508Gr.4N steel all position welding hydrogen controlled electrode has excellent in the present invention
When all-position welding processing performance, especially vertical position welding and overhead welding, arc stability, splashing is small, sleeve is moderate, and coating fusing is uniform,
Welding bead beautiful appearance, welder's operability is good, is suitble to the welding of SA-508Gr.4N steel.
Welding rod of the invention has ideal mechanical property, wherein tensile strength >=750MPa, female with SA-508Gr.4N steel
Material strength matching；Especially -30 DEG C of impact absorbing energy average value >=90J.
Welding rod of the invention is hydrogen controlled electrode, 3~5ml/100g of deposited metal diffusible hydrogen content.
The present invention is suitable for the all-position welding of SA-508Gr.4N steel.
Specific embodiment
The technical solution of the present invention is not limited to the following list, further includes between each specific embodiment
Any combination.
Specific embodiment 1: present embodiment low-temperature impact toughness it is excellent SA-508Gr.4N steel all position welding it is low
Hydrogen type welding rod, it includes core wire and coating；The core wire according to weight percent group become C≤0.04%, Si≤0.015%,
Mn≤0.50%, S≤0.004%, P≤0.008% and surplus Fe；The coating includes powder and binder；The powder
According to weight percent group become 30%~42% marble, 20%~30% fluorite, 4%~10% strontium carbonate, 3%
~8% titanium dioxide, 2%~7% quartz, 1%~3% yttrium base ferrosilicon, 4%~8% ferrotianium, 3%~7% electrolysis
Manganese, 3%~6% mid-carbon fe-mn, 3%~10% nickel powder, 0.5%~1% soda ash and 0.5%~1% potassium alginate.
The sum of weight percent of each component is 100% in present embodiment powder.
The system of the excellent SA-508Gr.4N steel all position welding hydrogen controlled electrode of low-temperature impact toughness in present embodiment
It is standby:
1, core wire is prepared in ratio described in specific embodiment one；
2, the powder of coating is prepared in ratio described in specific embodiment one, after the sieve of 40 mesh, is mixed
It closes uniformly, potassium-sodium water glass is then added, wet mixing is uniform, then extrusion is on core wire, finally into drying oven through low temperature, hot stage
Drying.
Two kinds of marble, strontium carbonate carbonate are added in present embodiment in the powder of coating, improves the alkali of slag
Degree increases slag surface tension.Wherein marmorean additional amount is 30%~42%, and too high levels will lead to de- slag difficulty, and
And since fusing point increases, electrode coating fusing can be made uneven, cause electric arc unstable；Content is too low, and blow force of arc is inadequate, protection
Bad, electric arc is unstable.The additional amount of strontium carbonate is 4%~10%, and slag characteristic, mentions when additional amount appropriate can improve welding
The craftsmanship of high welding rod vertical position welding and overhead welding；Slag fluidity is very good when content is too low, causes to drop down under slag when vertical position welding and overhead welding；Contain
Electric arc is unstable when then will lead to welding when measuring excessively high.
20%~30% fluorite is added in present embodiment in the powder of coating, viscosity coefficient of dross and flowing can be improved
Property, increase dehydrogenation；Too high levels slag is too dilute, and covering degenerates；Viscosity coefficient of dross is too big when content is too low, and welding bead molding is caused to be disliked
Change.
Present embodiment is added to 1%~3% yttrium base ferrosilicon in the powder of coating, and rare-earth yttrium is a kind of heavy rare earth, can
To improve the size and distribution of Second Phase Particles, crystal grain is refined, improves acicular ferrite content, improves the low temperature punching of weld metal
Toughness is hit, while rare-earth yttrium belongs to surface active element, thus it is possible to vary liquid state of molten pool metallic surface property reduces liquid state of molten pool
Absorption of the metal surface to arc space hydrogen atom, reduces the diffusible hydrogen content of weld metal, to reduce welding point cold cracking
Line sensibility.
Present embodiment is added to 0.5%~1% potassium alginate in the powder of coating, can increase coating plasticity and light
Slip improves the extrusion of welding rod, while potassium alginate can be ashed immediately in the welding process, it is possible to reduce splashes, increases electricity
Arc stbility.
Specific embodiment 2: the present embodiment is different from the first embodiment in that, the consumption of binder is powder
Expect the 25% of weight.It is other same as the specific embodiment one.
Specific embodiment 3: the present embodiment is different from the first embodiment in that, the binder is potassium sodium water
Glass.It is other same as the specific embodiment one.
Specific embodiment 4: the present embodiment is different from the first embodiment in that, the powder is according to weight hundred
Ratio group is divided to become 41% marble, 22% fluorite, 5% strontium carbonate, 4% titanium dioxide, 4% quartz, 1.5% yttrium
Base ferrosilicon, 5% ferrotianium, 5.5% electrolytic manganese, 4.8% mid-carbon fe-mn, 6% nickel powder, 0.6% soda ash and 0.6%
Potassium alginate.It is other same as the specific embodiment one.
Specific embodiment 5: the present embodiment is different from the first embodiment in that, the powder is according to weight hundred
Ratio group is divided to become 36.5% marble, 25% fluorite, 6% strontium carbonate, 5% titanium dioxide, 3% quartz, 2% yttrium
Base ferrosilicon, 6% ferrotianium, 6% electrolytic manganese, 4% mid-carbon fe-mn, 5% nickel powder, 0.7% soda ash and 0.8% seaweed
Sour potassium.It is other same as the specific embodiment one.
Specific embodiment 6: the present embodiment is different from the first embodiment in that, the powder is according to weight hundred
Ratio group is divided to become 32% marble, 25% fluorite, 9% strontium carbonate, 5% titanium dioxide, 4% quartz, 3% yttrium base
Ferrosilicon, 4% ferrotianium, 5% electrolytic manganese, 3.5% mid-carbon fe-mn, 8% nickel powder, 1% soda ash, 0.5% alginic acid
Potassium.It is other same as the specific embodiment one.
Specific embodiment 7: the present embodiment is different from the first embodiment in that, the powder is according to weight hundred
Ratio group is divided to become 35% marble, 25% fluorite, 6% strontium carbonate, 5% titanium dioxide, 4% quartz, 3% yttrium base
Ferrosilicon, 5% ferrotianium, 4% electrolytic manganese, 5.5% mid-carbon fe-mn, 6% nickel powder, 1% soda ash, 0.5% alginic acid
Potassium.It is other same as the specific embodiment one.
Specific embodiment 8: the present embodiment is different from the first embodiment in that, the powder is according to weight hundred
Ratio group is divided to become 38% marble, 28% fluorite, 4% strontium carbonate, 3% titanium dioxide, 3% quartz, 2% yttrium base
Ferrosilicon, 6% ferrotianium, 3% electrolytic manganese, 4.5% mid-carbon fe-mn, 7% nickel powder, 1% soda ash, 0.5% alginic acid
Potassium.It is other same as the specific embodiment one.
Beneficial effects of the present invention are verified by following embodiment:
Embodiment 1:
The excellent SA-508Gr.4N steel all position welding hydrogen controlled electrode of low-temperature impact toughness, it includes core wire and coating；
The core wire according to weight percent group become C≤0.04%, Si≤0.015%, Mn≤0.50%, S≤0.004%, P≤
0.008% and surplus Fe；The coating includes powder and binder；The powder is according to weight percent group as 32%
Marble, 25% fluorite, 9% strontium carbonate, 5% titanium dioxide, 4% quartz, 3% yttrium base ferrosilicon, 4% ferrotianium,
5% electrolytic manganese, 3.5% mid-carbon fe-mn, 8% nickel powder, 1% soda ash, 0.5% potassium alginate；
The consumption of binder is the 25% of powder weight；
The binder is potassium-sodium water glass.
The preparation of the excellent SA-508Gr.4N steel all position welding hydrogen controlled electrode of low-temperature impact toughness in the present embodiment:
1, core wire is prepared in ratio described in specific embodiment one；
2, the powder of coating is prepared in ratio described in specific embodiment one, after the sieve of 40 mesh, is mixed
It closes uniformly, potassium-sodium water glass is then added, wet mixing is uniform, then extrusion is on core wire, finally into drying oven through low temperature, hot stage
Drying.
The performance test results of welding rod are as shown in table 1 in the present embodiment；
Table 1 is the heat treatment state mechanical performance of 615 DEG C of welding rod deposited metal × for 24 hours
The deposited metal diffusible hydrogen content that mercury process measures is 4ml/100g.
Embodiment 2:
The excellent SA-508Gr.4N steel all position welding hydrogen controlled electrode of low-temperature impact toughness, it includes core wire and coating；
The core wire according to weight percent group become C≤0.04%, Si≤0.015%, Mn≤0.50%, S≤0.004%, P≤
0.008% and surplus Fe；The coating includes powder and binder；The powder is according to weight percent group as 35%
Marble, 25% fluorite, 6% strontium carbonate, 5% titanium dioxide, 4% quartz, 3% yttrium base ferrosilicon, 5% ferrotianium,
4% electrolytic manganese, 5.5% mid-carbon fe-mn, 6% nickel powder, 1% soda ash, 0.5% potassium alginate；
The consumption of binder is the 25% of powder weight；
The binder is potassium-sodium water glass.
The preparation of the excellent SA-508Gr.4N steel all position welding hydrogen controlled electrode of low-temperature impact toughness in the present embodiment:
1, core wire is prepared in ratio described in specific embodiment one；
2, the powder of coating is prepared in ratio described in specific embodiment one, after the sieve of 40 mesh, is mixed
It closes uniformly, potassium-sodium water glass is then added, wet mixing is uniform, then extrusion is on core wire, finally into drying oven through low temperature, hot stage
Drying.
The performance test results of welding rod are as shown in table 2 in the present embodiment；
Table 2 is the heat treatment state mechanical performance of 615 DEG C of welding rod deposited metal × for 24 hours
The deposited metal diffusible hydrogen content that mercury process measures is 3.6ml/100g.
Embodiment 3:
The excellent SA-508Gr.4N steel all position welding hydrogen controlled electrode of low-temperature impact toughness, it includes core wire and coating；
The core wire according to weight percent group become C≤0.04%, Si≤0.015%, Mn≤0.50%, S≤0.004%, P≤
0.008% and surplus Fe；The coating includes powder and binder；The powder is according to weight percent group as 38%
Marble, 28% fluorite, 4% strontium carbonate, 3% titanium dioxide, 3% quartz, 2% yttrium base ferrosilicon, 6% ferrotianium,
3% electrolytic manganese, 4.5% mid-carbon fe-mn, 7% nickel powder, 1% soda ash, 0.5% potassium alginate；
The consumption of binder is the 25% of powder weight；
The binder is potassium-sodium water glass.
The preparation of the excellent SA-508Gr.4N steel all position welding hydrogen controlled electrode of low-temperature impact toughness in the present embodiment:
1, core wire is prepared in ratio described in specific embodiment one；
2, the powder of coating is prepared in ratio described in specific embodiment one, after the sieve of 40 mesh, is mixed
It closes uniformly, potassium-sodium water glass is then added, wet mixing is uniform, then extrusion is on core wire, finally into drying oven through low temperature, hot stage
Drying.
The performance test results of welding rod are as shown in table 3 in the present embodiment；
Table 3 is the heat treatment state mechanical performance of 615 DEG C of welding rod deposited metal × for 24 hours
The deposited metal diffusible hydrogen content that mercury process measures is 3.2ml/100g.
Claims (8)
1. the excellent SA-508Gr.4N steel all position welding hydrogen controlled electrode of low-temperature impact toughness, it is characterised in that it includes weldering
Core and coating；The core wire according to weight percent group become C≤0.04%, Si≤0.015%, Mn≤0.50%, S≤
0.004%, the Fe of P≤0.008% and surplus；The coating includes powder and binder；The powder is according to weight percent
Group become 30%~42% marble, 20%~30% fluorite, 4%~10% strontium carbonate, 3%~8% titanium dioxide,
2%~7% quartz, 1%~3% yttrium base ferrosilicon, 4%~8% ferrotianium, 3%~7% electrolytic manganese, 3%~6%
Mid-carbon fe-mn, 3%~10% nickel powder, 0.5%~1% soda ash and 0.5%~1% potassium alginate.
2. the excellent SA-508Gr.4N steel all position welding hydrogen controlled electrode of low-temperature impact toughness according to claim 1,
It is characterized in that the consumption of binder is the 25% of powder weight.
3. the excellent SA-508Gr.4N steel all position welding hydrogen controlled electrode of low-temperature impact toughness according to claim 1,
It is characterized in that the binder is potassium-sodium water glass.
4. the excellent SA-508Gr.4N steel all position welding hydrogen controlled electrode of low-temperature impact toughness according to claim 1,
It is characterized in that the powder according to weight percent group become 41% marble, 22% fluorite, 5% strontium carbonate, 4%
Titanium dioxide, 4% quartz, 1.5% yttrium base ferrosilicon, 5% ferrotianium, 5.5% electrolytic manganese, 4.8% mid-carbon fe-mn,
6% nickel powder, 0.6% soda ash and 0.6% potassium alginate.
5. the excellent SA-508Gr.4N steel all position welding hydrogen controlled electrode of low-temperature impact toughness according to claim 1,
It is characterized in that the powder according to weight percent group become 36.5% marble, 25% fluorite, 6% strontium carbonate,
5% titanium dioxide, 3% quartz, 2% yttrium base ferrosilicon, 6% ferrotianium, 6% electrolytic manganese, 4% mid-carbon fe-mn, 5%
Nickel powder, 0.7% soda ash and 0.8% potassium alginate.
6. the excellent SA-508Gr.4N steel all position welding hydrogen controlled electrode of low-temperature impact toughness according to claim 1,
It is characterized in that the powder according to weight percent group become 32% marble, 25% fluorite, 9% strontium carbonate, 5%
Titanium dioxide, 4% quartz, 3% yttrium base ferrosilicon, 4% ferrotianium, 5% electrolytic manganese, 3.5% mid-carbon fe-mn, 8%
Nickel powder, 1% soda ash, 0.5% potassium alginate.
7. the excellent SA-508Gr.4N steel all position welding hydrogen controlled electrode of low-temperature impact toughness according to claim 1,
It is characterized in that the powder according to weight percent group become 35% marble, 25% fluorite, 6% strontium carbonate, 5%
Titanium dioxide, 4% quartz, 3% yttrium base ferrosilicon, 5% ferrotianium, 4% electrolytic manganese, 5.5% mid-carbon fe-mn, 6%
Nickel powder, 1% soda ash, 0.5% potassium alginate.
8. the excellent SA-508Gr.4N steel all position welding hydrogen controlled electrode of low-temperature impact toughness according to claim 1,
It is characterized in that the powder according to weight percent group become 38% marble, 28% fluorite, 4% strontium carbonate, 3%
Titanium dioxide, 3% quartz, 2% yttrium base ferrosilicon, 6% ferrotianium, 3% electrolytic manganese, 4.5% mid-carbon fe-mn, 7%
Nickel powder, 1% soda ash, 0.5% potassium alginate.
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