CN108372372A - Coated electrode - Google Patents
Coated electrode Download PDFInfo
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- CN108372372A CN108372372A CN201810076271.3A CN201810076271A CN108372372A CN 108372372 A CN108372372 A CN 108372372A CN 201810076271 A CN201810076271 A CN 201810076271A CN 108372372 A CN108372372 A CN 108372372A
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- coated electrode
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- 239000011248 coating agent Substances 0.000 claims abstract description 35
- 238000000576 coating method Methods 0.000 claims abstract description 35
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 26
- 239000010959 steel Substances 0.000 claims abstract description 26
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000005275 alloying Methods 0.000 claims abstract description 12
- 229910052742 iron Inorganic materials 0.000 claims abstract description 12
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 239000002893 slag Substances 0.000 claims abstract description 7
- 239000003381 stabilizer Substances 0.000 claims abstract description 7
- 229910052738 indium Inorganic materials 0.000 claims description 3
- 229910000967 As alloy Inorganic materials 0.000 claims description 2
- 238000003466 welding Methods 0.000 abstract description 114
- 239000002184 metal Substances 0.000 abstract description 85
- 229910052751 metal Inorganic materials 0.000 abstract description 83
- 229910052804 chromium Inorganic materials 0.000 abstract description 7
- 229910052758 niobium Inorganic materials 0.000 abstract description 6
- 229910052750 molybdenum Inorganic materials 0.000 abstract description 5
- 229910052759 nickel Inorganic materials 0.000 abstract description 5
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 5
- 229910052721 tungsten Inorganic materials 0.000 abstract description 5
- 229910052720 vanadium Inorganic materials 0.000 abstract description 5
- 229910052748 manganese Inorganic materials 0.000 abstract description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 41
- 239000002245 particle Substances 0.000 description 30
- 238000012360 testing method Methods 0.000 description 21
- 239000013078 crystal Substances 0.000 description 18
- 230000000694 effects Effects 0.000 description 18
- 238000010438 heat treatment Methods 0.000 description 15
- 239000011159 matrix material Substances 0.000 description 14
- 238000001016 Ostwald ripening Methods 0.000 description 13
- 239000000463 material Substances 0.000 description 10
- 230000002401 inhibitory effect Effects 0.000 description 8
- 125000004429 atom Chemical group 0.000 description 6
- 230000006866 deterioration Effects 0.000 description 6
- 238000005204 segregation Methods 0.000 description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 4
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 4
- 239000002585 base Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 4
- 239000010931 gold Substances 0.000 description 4
- 229910052737 gold Inorganic materials 0.000 description 4
- 238000009863 impact test Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 229910001512 metal fluoride Inorganic materials 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 239000006104 solid solution Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 235000013399 edible fruits Nutrition 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000000284 extract Substances 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000019353 potassium silicate Nutrition 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 238000010010 raising Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910017061 Fe Co Inorganic materials 0.000 description 1
- 229910002551 Fe-Mn Inorganic materials 0.000 description 1
- 229910017082 Fe-Si Inorganic materials 0.000 description 1
- 229910017116 Fe—Mo Inorganic materials 0.000 description 1
- 229910017133 Fe—Si Inorganic materials 0.000 description 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 239000004111 Potassium silicate Substances 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004520 agglutination Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910001068 laves phase Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910052913 potassium silicate Inorganic materials 0.000 description 1
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007778 shielded metal arc welding Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 235000019795 sodium metasilicate Nutrition 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite 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
- 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
- B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
-
- 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
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The present invention provides a kind of coated electrode for the welding metal that can obtain creep rupture properties and excellent tenacity.It is a kind of that coating is coated in coated electrode made of steel core wire periphery, among one of described coating and the steel core wire or both, in the coated electrode gross mass, as alloying component, contain C in terms of quality %：0.05~0.20%, Si：0.3~1.0%, Mn：0.1~1.1%, Ni：0% or more and below 0.5%, Cr：3~12%, Mo：0.05~0.55%, V：0.02~0.50%, Nb：0.01~0.09%, Co：0.55~2.20%, W：0.4~2.0%, N：0.01~0.10%, B：0.001~0.100%, surplus is made of gas-forming agent, slag former, arc stabilizer, iron and inevitable impurity.
Description
Technical field
The present invention relates to coated electrodes.
Background technology
For the works of boiler and heat exchanger etc. in steam power plant, it is desirable that have heat resistance and resistance to pressure etc.
Characteristic, the steam temperature and vapour pressure of thermal power generation increasingly improve in recent years from the viewpoint of thermal efficiency raising.For example, super
The steam temperature of overcritical fire coal thermal power generation is about 500~600 DEG C.Above structure object is because for a long time in high temperature, high pressure
Lower holding, so straining increased creep with stress application, the passage of time.
The former material of above structure object uses to have the characteristic of heat resistance and resistance to pressure etc. more largely containing Cr's
Heat resisting steel.In addition, for above-mentioned former material, it is desirable that the creep rupture that will not be broken long-time exposes to the open air under high temperature, high pressure
Excellent also requires toughness also excellent.
About above structure object, is usually constructed for carrying out arc welding as the high Cr steel of former material, weld high Cr
Steel is formed by welding metal, also requires creep rupture properties and excellent tenacity.In addition, arc welding is formed by welding gold
Belong to, is implementing post weld heat treatment (Post Weld Heat Treatment generally for residual stress is removed；PWHT).
But Cr has the function of making ferrite stabilization, if therefore welding high Cr steel, delta ferrite is generated when welding,
And remain in the welding metal after welding.Welding of the delta ferrite under the welded condition before implementing post weld heat treatment
What is observed in metal is coarse tissue, will not be disappeared through post weld heat treatment, it is known that can be to the weldering after post weld heat treatment
Connect the creep rupture properties of metal, toughness causes harmful effect.
Creep rupture properties, toughness about welding metal are generally used and are extracted from the specific position of welding metal
When test film does not include delta ferrite by chance come the position evaluated, therefore extract test film, then good characteristic is shown.
But in the welding metal of practice of construction, even a part of, if there is delta ferrite generation, be also possible to occur destroy or
Fracture, therefore in order to firmly believe safety, need the generation for inhibiting delta ferrite in the whole region of welding metal.
The technology for inhibiting the generation of delta ferrite when as welding, for example, as it is known that there is Patent Documents 1 to 3.Patent document 1~
3 all refer to welding material used when welding.
It describes in patent document 1, Ni is being effective element for improving in toughness, but then, is promoted
Into the agglutination of carbide, oxide, the creep strength under high temperature long-time is made to reduce.Moreover, describe in the publication, by
The two or one that Co, Cu are added in steel core wire or coating, with replacement be considered improving effective Ni to toughness, so as to press down
The generation of delta ferrite processed improves creep strength while ensuring the toughness of welding metal.
Describe in patent document 2, by added in welding wire C, Si of appropriate amount, Mn, Cr, Ni, Co, Cu, Mo,
W, V, Nb and N, it can be ensured that high temperature creep strength, toughness and cracking resistance, by with the relationship of content appropriate, adding Cr, W
The element generated with the ferrite generating elements of Mo and the inhibition ferrite of Ni, Co, so as to inhibit the δ in welding metal
Ferritic generation simultaneously further increases creep strength and toughness, by inhibiting low Mo amounts, after inhibiting high temperature to keep
Phase transformation to σ phases.
It is described in patent document 3, the creep strength of welding metal, the amount of the precipitate of adjoint MX (carbonitride)
Increase and improve, toughness then largely depends on the amount of precipitation and Ae1 transformation temperatures of delta ferrite.
In addition, describe in patent document 4, by added in welding wire C, Si of appropriate amount, Mn, Cu, Ni, Co,
Cr, Mo, V, Nb, W, N, be capable of providing weld part high temperature creep strength and this two side of toughness it is excellent high Cr ferrites it is heat-resisting
Steel welding wire.
【Existing technical literature】
【Patent document】
【Patent document 1】The flat 7-268562 bulletins of Japanese Laid-Open
【Patent document 2】The flat 8-187592 bulletins of Japanese Laid-Open
【Patent document 3】The flat 11-170087 bulletins of Japanese Laid-Open
【Patent document 4】Japanese Laid-Open 2004-42116 bulletins
In above patent document 1~4, description is about welding material used when welding, using the welding material shape
At welding metal.But the generation of the whole region delta ferrite in welding metal whether be inhibited it is unclear.
Invention content
It is done currently invention addresses above-mentioned such situation, it is intended that creep rupture spy can be obtained by providing one kind
The coated electrode of property and the welding metal of excellent tenacity.
The present inventors have studied what delta ferrite when can make welding at a high level generated to reach the purpose
The means that both raisings of the creep rupture properties of inhibition and welding metal are existed side by side, as a result, it has been found that, it is applied by suitable control
The composition of alloy of medicine welding rod can reach the purpose, thereby completing the present invention.
It is the coating comprising steel core wire and the periphery for being coated over the steel core wire that is, the present invention relates to coated electrode
Coated electrode,
Among one of described coating and the steel core wire or both, in the coated electrode gross mass, as conjunction
Golden ingredient is contained in terms of quality %
C：0.05~0.20%,
Si：0.3~1.0%,
Mn：0.1~1.1%,
Ni：0% or more and below 0.5%,
Cr：3~12%,
Mo：0.05~0.55%,
V：0.02~0.50%,
Nb：0.01~0.09%,
Co：0.55~2.20%,
W：0.4~2.0%,
N：0.01~0.10%,
B：0.001~0.100%,
Surplus is made of gas-forming agent, slag former, arc stabilizer, iron and inevitable impurity.
Above-mentioned coated electrode is among one of coating and steel core wire or both, in coated electrode gross mass, as conjunction
Golden ingredient can also also contain Ti in terms of quality %：Higher than 0% and below 0.03%.
In addition, above-mentioned coated electrode, among one of coating and steel core wire or both, in coated electrode gross mass,
As alloying component, Cu can also be also contained in terms of quality %：Higher than 0% and below 0.25%.
In addition, above-mentioned coated electrode, among one of coating and steel core wire or both, in coated electrode gross mass,
As alloying component, Al can also be also contained in terms of quality %：Higher than 0% and below 1.5%.
Coated electrode according to the present invention can obtain the welding metal of creep rupture properties and excellent tenacity.
Description of the drawings
Fig. 1 is that the C atoms of the test film of a certain welding metal and the atom map of Cr atoms (are explained, each point
Point indicates atom).
Fig. 2 is indicated in the test film of a certain welding metal, and the surface density for the segregation B for being present in matrix crystal boundary is measured
(BGB) when set, the figure of columned analyzed area vertical with crystal boundary face and penetrating through crystal boundary face.
Fig. 3 is song when indicating in columned analyzed area shown in Fig. 2 to measure atomic concentration along analysis directions
The figure of line.
Fig. 4 is the extraction position for indicating to be used for the test film of the evaluation of creep rupture properties in an embodiment of the present invention
Schematic diagram.
Fig. 5 is the schematic diagram for the extraction position for indicating to be used for the test film of the evaluation of toughness in an embodiment of the present invention.
Specific implementation mode
Hereinafter, being illustrated in detail with regard to mode for carrying out the present invention.In addition, the present invention is not by reality described below
The mode of applying limits.In addition, in the present specification, the percentage (quality %) on the basis of quality and the percentage on the basis of weight
Rate (weight %) is synonymous.
The coated electrode of the present invention is the coating weldering of the coating comprising steel core wire and the periphery for being coated in the steel core wire
Item, among one of described coating and the steel core wire or both, in the coated electrode gross mass, as alloy at
Point, in terms of quality %, contain C：0.05~0.20%, Si：0.3~1.0%, Mn：0.1~1.1%, Ni：0% or more and
0.5% or less, Cr：3~12%, Mo：0.05~0.55%, V：0.02~0.50%, Nb：0.01~0.09%, Co：0.55~
2.20%, W：0.4~2.0%, N：0.01~0.10%, B：0.001~0.100%, surplus by gas-forming agent, slag former,
Arc stabilizer, iron and inevitable impurity are constituted.
B is generally fused by M23C6Representative carbide particle (hereinafter simply referred to as " M23C6Particle "), so that creep rupture is tried
M in testing23C6Grain stabilised, these particles hinder dislocation movement, it is thus regarded that can improve creep rupture properties.
Therefore, the present inventors make M to apply flexibly this effect to the maximum extent for B23C6The stabilizing mechanism of particle
It is studied.
Under the hot environment as creep rupture test, M23C6Particle due to Ostwald (Ostwald) cure,
Total population is caused drastically to reduce.Here, so-called Ostwald ripening, is exactly in heat treatment, the small particle of grain size disappears
The phenomenon that mistake, another aspect, big particle continues growth.Present inventors found that M23C6The Ostwald ripening of particle
Rate is controlled by the diffusion of B.
That is, in M23C6During the Ostwald ripening of particle, for M23C6The coarsening of particle was needed from week
The matrix supply B enclosed.At this moment, it can make to be present in matrix crystal boundary or transgranular B is reduced to certain value hereinafter, causing M23C6Particle
Ostwald ripening is suppressed.
As a result, the M under high temperature23C6The reduction speed of particle reduces, and the creep rupture that can improve welding metal is special
Property.
In the present invention, it is based on above-mentioned cognition, in order to by welding in obtained welding metal, make B with shape appropriate
State exists, in addition, in order to inhibit delta ferrite when welding to generate, provides the alloying component amount of coated electrode as follows.Also
Have, these alloying components, one of steel core wire and coating can be added to, or can also all add in both.Separately
Outside, each alloying component amount (%) in coated electrode below, is the content (quality %) in coated electrode gross mass.
(C：0.05~0.20 mass %)
C forms carbide, contributes to the element for improving the creep rupture properties of welding metal.In order to play such effect
Fruit, in the present invention, C amounts are 0.05% or more.C amounts are preferably 0.07% or more, more preferably 0.09% or more.If but mistake
Contain C surplusly, then carbide excessively coarsening, the toughness of welding metal reduces.Therefore in the present invention, C amounts for 0.20% with
Under.C amounts are preferably 0.18% hereinafter, more preferably 0.16% or less.In addition, when C is added by coating, can be allowed to containing at it
It is added in his raw metal.
(Si：0.3~1.0 mass %)
Si is functioned as deoxidier, and the intensity of welding metal and toughness is made to improve.In addition, when Si contributes to welding
The element that improves of operability, if Si amounts less than 0.3%, weld operational deterioration.Therefore in the present invention, Si amounts are
0.3% or more.Si amounts are preferably 0.4% or more, more preferably 0.5% or more.If but excessively contain Si, weld
The rising of the intensity surplus of metal, incurs the deterioration of toughness.Therefore in the present invention, Si amounts are 1.0% or less.Si amounts are preferably
0.8% hereinafter, more preferably 0.7% or less.In addition, when Si is added by coating, can be added by Fe-Si etc..
(Mn：0.1~1.1 mass %)
Mn is functioned as deoxidier, and the intensity of welding metal and toughness is made to improve.In addition, Mn is that have in welding
Delta ferrite is inhibited to generate the element of this effect.If Mn amounts are less than 0.1%, delta ferrite is easy to generate when welding, and has generated
Delta ferrite can not disappear implementing post weld heat treatment, therefore, if generating delta ferrite when welding, there are δ iron elements
Body to welding metal creep rupture properties and malleable band come the possibility that adversely affects.Therefore in the present invention, Mn amounts are
0.1% or more.Mn amounts are preferably 0.2% or more, more preferably 0.3% or more.But if excessively containing Mn, carbide
The Ostwald ripening of particle is excessively promoted, the creep rupture properties deterioration of welding metal.Therefore in the present invention, Mn
Amount is 1.1% or less.Mn amounts are preferably 0.8% hereinafter, more preferably 0.7% or less.In addition, when Mn is added by coating, it can
It is added by Fe-Mn etc..
(Ni：0 mass % or more, 0.5 mass % or less)
Ni is the element for promoting the diffusion of alloy elements in matrix.But if excessively adding Ni, the diffusion of B is encouraged,
M23C6The Ostwald ripening of particle is easy to carry out, the creep rupture properties deterioration of welding metal.Therefore in the present invention,
Ni amounts are 0.5% or less.Ni amounts are preferably 0.4% hereinafter, more preferably 0.3% or less.In addition, when Ni is added by coating, energy
Enough it is added by Fe-Ni etc..
(Cr：3~12 mass %)
Cr forms M when the metallic element of Cr, Fe and Mo etc. are expressed as M23C6Particle is the compacted of improvement welding metal
Become the element of fracture characteristics.In order to play such effect, in the present invention, it is 3% or more to make Cr amounts.Cr amounts are preferably 4%
More than, more preferably 5% or more.If but excessively contain Cr, delta ferrite is easy to generate when welding, generated δ iron element
Body will not disappear implementing post weld heat treatment, so if generating delta ferrite in welding, then there is delta ferrite to weldering
The improvement of the creep rupture properties and toughness that connect metal brings dysgenic possibility.Therefore in the present invention, Cr amounts are
12% or less.Cr amounts are preferably 11% hereinafter, more preferably 10% or less.In addition, when Cr is added by coating, Fe- can be passed through
Cr etc. is added.
(Mo：0.05~0.55 mass %)
Mo is the element for improving the creep rupture properties of welding metal by solution strengthening.In order to play such effect
Fruit, in the present invention, it is 0.05% or more to make Mo amounts.Mo amounts are preferably 0.10% or more, more preferably 0.15% or more.But
It is that if excessively containing Mo, delta ferrite is easy to generate when welding, and generated delta ferrite is even if implementation post weld heat treatment
It will not disappear, so if generating delta ferrite in welding, then there are creep rupture properties of the delta ferrite for welding metal
Improvement with toughness brings dysgenic possibility.Therefore in the present invention, Mo amounts are 0.55% or less.Mo amounts are preferably
0.50% hereinafter, more preferably 0.45% or less.In addition, when Mo is added by coating, can be added by Fe-Mo etc..
(V：0.02~0.50 mass %)
V-arrangement is the element for the creep rupture properties for improving welding metal at MX (carbonitride).In addition its effect also having
Fruit is to fix N as MX, to reduce the B amounts generated as BN, makes to be fused to M23C6B amounts in particle increase, and thus inhibit
M23C6The Ostwald ripening of particle.In order to play such effect, in the present invention, it is 0.02% or more to make V amounts.V
Amount preferably 0.05% or more, more preferably 0.10% or more.But if excessively containing V, delta ferrite generates when welding.
In addition, the Ostwald ripening of the MX (carbonitride) under incurring high temperature.As a result, the creep rupture of welding metal is special
Property and toughness deterioration.Therefore in the present invention, V amounts are 0.50% or less.V amounts are preferably 0.40% hereinafter, more preferably
0.30% or less.In addition, when V is added by coating, can be allowed to containing being added in other raw metals.
(Nb：0.01~0.09 mass %)
Nb forms MX (carbonitride), is the element for the creep rupture properties for improving welding metal.It is such in order to play
Effect, in the present invention, it is 0.010% or more to make Nb amounts.Nb amounts be preferably 0.015% or more, more preferably 0.020% with
On.But if excessively containing Nb, incurs the excessive rising of the intensity of welding metal, toughness is made to deteriorate.Therefore in the present invention
In, Nb amounts are 0.090% or less.Nb amounts are preferably 0.075% hereinafter, more preferably 0.070% or less.In addition,
When Nb is added by coating, it can be allowed to containing being added in other raw metals.
(Co：0.55~2.20 mass %)
Co inhibits the generation of delta ferrite when welding, is the element of the creep rupture properties and toughness that improve welding metal.For
Such effect is played, in the present invention, it is 0.55% or more to make Co amounts.Co amounts are preferably 0.65% or more, more preferably
0.75% or more.But if excessively containing Co, incurs the excessive rising of the intensity of welding metal, toughness is made to deteriorate.Cause
This in the present invention, Co amounts be 2.20% or less.Co amounts are preferably 2.00% hereinafter, more preferably 1.80% or less.In addition, Co
When being added by coating, it can be added by Fe-Co etc..
(W：0.4~2.0 mass %)
W is same as Mo, improves the creep rupture properties of welding metal as solution strengthening element, in addition to this,
It is precipitated in crystal boundary as Laves phases under high temperature, interferes the B of crystal boundary to spread, to it can be expected that M23C6The Ostwald of particle
The inhibiting effect of curing.In order to play such effect, in the present invention, it is 0.4% or more to make W amounts.W amounts are preferably 0.6%
More than, more preferably 0.8% or more.It is easy to generate delta ferrite, generated δ iron but if excessively containing W, when welding
Ferritic will not disappear implementing post weld heat treatment, so if generating delta ferrite in welding, then there is delta ferrite pair
Dysgenic possibility is brought in the creep rupture properties of welding metal and the improvement of toughness.Therefore in the present invention, W amounts are
2.0% or less.W amounts are preferably 1.8% hereinafter, more preferably 1.6% or less.In addition, when W is added by coating, can pass through
Fe-W etc. is added.
(N：0.01~0.10 mass %)
N is same as Nb, forms MX (carbonitride), is the element for the creep rupture properties for improving welding metal.In order to send out
Such effect is waved, in the present invention, it is 0.010% or more to make N amounts.N amounts are preferably 0.015% or more, more preferably
0.020% or more.But if excessively containing N, incurs the excessive rising of the intensity of welding metal, toughness is made to deteriorate.Cause
This in the present invention, N amounts be 0.10% or less.N amounts are preferably 0.09% hereinafter, more preferably 0.08% or less.In addition, N by
When coating adds, it can be allowed to containing being added in other raw metals.
(B：0.001~0.100 mass %)
B is fused to M23C6Particle inhibits M23C6The Ostwald ripening of particle is the creep rupture for improving welding metal
The element of characteristic.In order to play such effect, in the present invention, it is 0.001% or more to make B amounts.B amounts are preferably 0.003%
More than, more preferably 0.005% or more, further preferably 0.011% or more.But if excessively adding B, weld gold
The intensity of category too greatly rises, it is impossible to ensure defined toughness.Therefore in the present invention, B amounts are 0.100% or less.B amounts are excellent
0.090% is selected as hereinafter, more preferably 0.080% or less.In addition, when B is added by coating, can be allowed to containing in other gold
Belong to and being added in raw material.
In addition, the coated electrode of the present invention, as other elements, can also also contain other than above-mentioned alloying element
There is at least one selected in the group constituted from following (a)~(c).
(a)Ti：Higher than 0% and below 0.03%.
(b)Cu：Higher than 0% and below 0.25%.
(c)Al：Higher than 0% and below 1.5%.
Ti is not required element, but forms MX (carbonitride), contributes to the creep rupture properties of welding metal and improves
Element.In order to effectively play such effect, Ti amounts are preferably 0.001% or more, more preferably 0.002% or more, into
One step is preferably 0.003% or more.But if excessively containing Ti, the intensity of welding metal too greatly rises, and toughness is bad
Change.Therefore in the present invention, Ti amounts are preferably 0.03% or less.Ti amounts are more preferably 0.025% hereinafter, further preferably
0.020% or less.
Cu is not required element, but it is with the element for inhibiting delta ferrite to generate this effect in welding.In order to have
Effect ground plays such effect, and Cu amounts are preferably 0.01% or more, more preferably 0.02% or more, further preferably
0.025% or more.But if excessively containing Cu, encourages ferrite and (be referred to as ferrite in the tissue of band-like elongated growth
Band.) generation, the creep rupture properties of welding metal, toughness deterioration.Therefore in the present invention, Cu amounts are preferably 0.25%
Below.Cu amounts are more preferably 0.20% hereinafter, further preferably 0.15% or less.
Al is not required element, but it is the element to play a role as deoxidier.In order to effectively play such effect
Fruit, Al amounts are preferably 0.01% or more, more preferably 0.02% or more, further preferably 0.025% or more.But if mistake
Contain Al surplusly, then generate coarse oxide, become the starting point of brittle break, the toughness of welding metal reduces.Therefore at this
In invention, Al amounts are preferably 1.5% or less.Al amounts are preferably 1.3% hereinafter, more preferably 1.1% or less.
The surplus of the coated electrode of the present invention gas-forming agent, slag former, arc stabilizer, iron and can not preferably be kept away
The impurity exempted from.In addition, in the coated electrode of the present invention, as gas-forming agent, slag former and arc stabilizer, gold is preferably comprised
Belong to carbonate, metal fluoride, SiO2And alkali metal oxide.
In addition, as metal carbonate, such as CaCO can be added3Deng.As metal fluoride, such as can add
CaF2Deng.As alkali metal oxide, such as Na can be added2O、K2O etc..But metal carbonate, metal fluoride and alkali
Metal oxide is not welded as gas-forming agent, slag former or arc stabilizer if it is coating by these any restrictions of illustration
It would generally add in the coating of item, as long as not hindering the effect of the present invention then, can be applicable in without exception.
The content of metal carbonate in the coated electrode gross mass of the present invention is not particularly limited, for example, being 5~22 matter
Measure %.
In addition, the content of the metal fluoride in the coated electrode gross mass of the present invention is also not particularly limited, for example, being
2~12 mass %.
In addition, the SiO in the coated electrode gross mass of the present invention2Content be also not particularly limited, for example, be 5~12
Quality %.
In addition, the content of the alkali metal oxide in the coated electrode gross mass of the present invention is also not particularly limited, for example,
For 4~12 mass %.
Ratio in the coated electrode of the present invention shared by coating is not particularly limited, relative to coated electrode gross mass, example
Such as it is 20~40 mass %.
In addition, the ratio in the coated electrode of the present invention shared by steel core wire is not particularly limited, it is total relative to coated electrode
Quality, for example, 60~80 mass %.
In addition, the coated electrode of the present invention, such as can manufacture in the following manner.
First, coating is applied by the binder of waterglass representated by sodium metasilicate, potassium silicate etc. by common welding rod
Installation, it is coating to be coated on around steel core wire.Thereafter, it in order to remove moisture, such as is burnt into 400~550 DEG C.
Coated electrode according to the present invention can obtain the welding metal of creep rupture properties and excellent tenacity.Here, should
Welding metal preferably satisfies important document below.
(it is present in the transgranular solid solution B concentration of the matrix of welding metal：0.0008 mass % or less)
The transgranular solid solution B concentration (B of matrix by will be present in welding metalM) control in 0.0008 mass % hereinafter,
Contribute to the M under high temperature23C6The supply of the coarsening B of particle is suppressed, M23C6The Ostwald ripening of particle is pressed down
System, creep fracture time obtain long-timeization, therefore preferably.BMMore preferably 0.0005 mass % is hereinafter, more preferably
0.0003 mass % or less.BMCan also be 0 mass %.
(it is present in the surface density (B of the segregation B of the matrix crystal boundary of welding metalGB)：3.0/nm2Below)
By the way that there will be the surface density (B of the segregation B of the matrix crystal boundary of welding metalGB) control in 3.0/nm2Hereinafter, having
Help the M under high temperature23C6The supply of the coarsening B of particle is suppressed, M23C6The Ostwald ripening of particle is pressed down
System makes creep fracture time obtain long-timeization, therefore preferably.BGBMore preferably 2.0/nm2Hereinafter, further preferably
1.0/nm2Below.BGBCan also be 0/nm2。
(the O amounts in welding metal：0.080% or less)
O is the element to form oxide, if excessively containing O, oxide coarsening becomes the starting point of brittle break,
Toughness reduces, therefore the O amounts in preferred weld metal are 0.080% or less.O amounts are more preferably 0.075% hereinafter, further excellent
It is selected as 0.070% or less.O amounts are lower, and toughness is more improved, but usually contain 0.030~0.060% or so.
In addition, above-mentioned welding metal, preferably satisfies the relationship of following formula (1).
([V]×[B]/[N])×100≥0.42(1)
(in formula, [V], [B] and [N] indicates the content of V, B and N in welding metal respectively.)
Its reason is as follows.
That is, B is fused to M23C6Particle and the Ostwald ripening for inhibiting the particle, still, if the B for being generated as BN increases
Add, then cannot substantially ensure and be fused to M23C6The B amounts of particle.In addition, N is generated as the carbonitride first containing V, remaining N
Just form BN.Therefore, in order to ensure being fused to M23C6B amounts in particle need on the basis of adding B with specified amount, fully to make
Carbonitride Precipitation containing V.
From the perspective of above, in above-mentioned welding metal, preferably X=([V] × [B]/[N]) × 100 be 0.42 with
On.If production quantities of the X less than 0.42, BN increases, it is fused to M23C6The B of particle is reduced, as a result, it is impossible to fully inhibiting should
The Ostwald ripening of particle.X is more preferably 0.44 or more, further preferably 0.45 or more.In addition, X is preferably 5.0
Hereinafter, more preferably 4.0 or less.
【Embodiment】
Hereinafter, enumerating embodiment further illustrates the present invention, but the present invention is not limited by these embodiments, can accorded with
In the range of closing spirit of the invention, implementation can be changed, these are all contained in the technical scope of the present invention.
Using meeting at the base material being grouped as, surplus is made of iron and inevitable impurity shown in following table 1, separately
Outside, using meeting at the coated electrode being grouped as shown in following table 2, with aftermentioned welding condition, making meets following Table 3 institute
Show at being grouped as, the welding metal that surplus is made of iron and inevitable impurity evaluates various characteristics.
In addition, the "-" of each component amount in table 3, indicates that content is impurity level.
【Table 1】
【Table 2】
【Table 3】
＜ welding conditions ＞
Welding method：Welding electrode arc welding (SMAW)
Base material plate thickness：20mm
Bevel angle：20 ° (V words)
Root interval：16mm
Weld posture：Downwards
Core diameter：φ4.0mm
Heat input condition：About 2.2kJ/mm (150A-24V, 8~12cm/ minute)
Laminating method：The double welding beads of single layer
Preheat interlayer temperature：200~400 DEG C
(whether there is or not delta ferrites)
From the welding metal of obtained welded condition, so as to can be observed perpendicular to the section of welding direction
Mode extracts test film, golden with 400 times of observations of multiplying power by light microscope with the section of iron chloride etching solution corrosion test piece
Belong to tissue.When not observing delta ferrite in whole cross section, it is determined as " no delta ferrite ", is evaluated as qualification.In whole cross section
It is determined as " having delta ferrite " if even if observing when a delta ferrite, is evaluated as unqualified.Judgement result is shown in following tables
In 4.
Then, for welding obtained welding metal, to keep temperature：700~800 DEG C, retention time：2~10h's
Condition carries out post weld heat treatment (PWHT), evaluates the characteristic of welding metal.As a result it is shown in following table 4.
(be present in the transgranular solid solution B concentration of matrix and be present in the surface density of the segregation B of matrix crystal boundary)
From the welding metal after post weld heat treatment, carried in a manner of so that the face perpendicular to welding direction is observed
Test film is taken, metal groups are observed for 400 times with multiplying power by light microscope with the section of iron chloride etching solution corrosion test piece
It knits.Using focused ion beam apparatus (Helios-600 of FEI societies), the needle-shaped test film containing crystal boundary is made, and be free of crystal boundary
The needle-shaped test film of (only transgranular), using three-dimensional atom probe (the LEAP 3000HR of CAMECA societies), with measuring temperature
The condition implementation of 50K, pulse score 15% measure.Obtained data are analyzed by analysis software IVAS.More in detail
It carefully says, is exactly to implement to measure as follows and analyze.
The solid solution B concentration (B transgranular about matrix is present inM), use the survey of (only transgranular) test film without crystal boundary
Measure data.That is, being that matrix is transgranular by the equally distributed regional determination of carbon, from the total atom number detected, ambient noise is removed
Later, B concentration is acquired.In addition, the concentration measured by atom-probe is atomicity %, but quality % is converted into when evaluation.As a result
It is shown in following table 4.
Surface density (B about the segregation B for being present in matrix crystal boundaryGB), use the measurement data of the test film containing crystal boundary.Ginseng
According to Fig. 1~Fig. 3, illustrate the surface density of the segregation B for being present in matrix crystal boundary in the test film for measuring a certain welding metal
(BGB) gimmick.First, such atom map according to Fig. 1 is high by the atomic concentration of alloying element as C and Cr
Planar regional determination is crystal boundary face.Then, as shown in Fig. 2, with perpendicular to crystal boundary face, and the mode in crystal boundary face is penetrated through, sets bottom
The radius in face is the columned analyzed area (hereinafter simply referred to as " cylinder ") of 5nm, and the top from the side of the cylinder measures
Atomic concentration contained in the region of each length 0.5nm, is made curve shown in Fig. 3 on long axis direction.Then, with C and
Contained B atomicities divided by the floor space (round area) of cylinder in the high region of alloy element concentration as Cr, calculate inclined
Analyse the surface density of B.As a result it is shown in following table 4.
Next, the characteristic as the welding metal for implementing post weld heat treatment, evaluates creep rupture properties and toughness.
＜ creep rupture properties ＞
From the plate thickness central portion for the welding metal for implementing post weld heat treatment, based on Fig. 4 on sealing wire direction, with gauge length
30mm, extractionCreep test piece, creep test is carried out with the condition of 675 DEG C, 100MPa, is measured until test film
The time of fracture.In Fig. 4, T indicates the plate thickness of base material.The case where rupture time Tr is more than 400 hours, is determined as creep rupture
Excellent is evaluated as qualification.
＜ toughness ＞
From the plate thickness central portion for the welding metal for implementing post weld heat treatment, it is based on Fig. 5, it is vertical with sealing wire direction and carry
Pendulum impact test piece is taken, and carries out pendulum impact test.In Fig. 5, T indicates the plate thickness of base material.Pendulum impact test piece extracts
No. 4 V notch test sheets of JIS Z3111 (2005) defined.The main points of JIS Z2242 (2005) are pressed in pendulum impact test, with
20 DEG C of progress, measure and absorb energy.It measures and carries out 3 times, acquire the measured average value (vE for absorbing energy20℃).As a result it is shown in down
It states in table 4.Average value (vE20℃) be 41J or more welding metal be evaluated as excellent tenacity.
【Table 4】
Among example 1~20, example 1~13 is embodiment, and example 14~20 is comparative example.
In example 14, because of welding metal its creep rupture properties that the V amounts in coated electrode down to 0.01%, obtain
Difference.
In example 15, because the Ni amounts in coated electrode are up to 0.62%, its creep rupture of obtained welding metal is special
Property is poor.
In example 16, because the Si amounts in coated electrode are down to 0.22%, in addition Mn amounts are down to 0.05%, so obtained weldering
Connect metal its poor toughness.
In example 17, because the Si amounts in coated electrode, which are up to 1.10%, Nb amounts, is up to 0.092%, in addition B amounts are up to
0.110%, so its poor toughness of obtained welding metal.
In example 18, because the Cr amounts in coated electrode are up to 13.67%, δ iron elements are generated in obtained welding metal
Body, in addition creep rupture properties and poor toughness.
In example 19, because the W amounts in coated electrode are up to 2.1%, B is in addition free of, so raw in obtained welding metal
At delta ferrite, in addition creep rupture properties and poor toughness.
In example 20, because the Co amounts in coated electrode down to 0.49%, are in addition free of B, so obtained welding metal
Middle generation delta ferrite, in addition creep rupture properties are poor.
On the other hand, in the defined example 1~13 that coated electrode meets the present invention, δ iron elements are not generated in welding metal
Body, in addition creep rupture properties and excellent tenacity.
Claims (5)
1. a kind of coated electrode is the coated electrode of the coating containing steel core wire and the periphery for being coated in the steel core wire,
In,
Among one of described coating and the steel core wire or both, in the coated electrode gross mass, as alloy at
Point, contained in terms of quality %
C：0.05~0.20%,
Si：0.3~1.0%,
Mn：0.1~1.1%,
Ni：0% or more and below 0.5%,
Cr：3~12%,
Mo：0.05~0.55%,
V：0.02~0.50%,
Nb：0.01~0.09%,
Co：0.55~2.20%,
W：0.4~2.0%,
N：0.01~0.10%,
B：0.001~0.100%,
Surplus is made of gas-forming agent, slag former, arc stabilizer, iron and inevitable impurity.
2. coated electrode according to claim 1, wherein one of described coating and the steel core wire or both it
In, in the coated electrode gross mass, as alloying component, also contain Ti in terms of quality %：Higher than 0% and 0.03% with
Under.
3. coated electrode according to claim 1 or 2, wherein in one of described coating and the steel core wire or both
Among, in the coated electrode gross mass, as alloying component, also contain Cu in terms of quality %：Higher than 0% and 0.25%
Below.
4. coated electrode according to claim 1 or 2, wherein in one of described coating and the steel core wire or both
Among, in the coated electrode gross mass, as alloying component, also contain Al in terms of quality %：Higher than 0% and 1.5%
Below.
5. coated electrode according to claim 3, wherein one of described coating and the steel core wire or both it
In, in the coated electrode gross mass, as alloying component, also contain Al in terms of quality %：Higher than 0% and 1.5% with
Under.
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| JP2017015797A JP6829090B2 (en) | 2017-01-31 | 2017-01-31 | Shielded metal arc welding rod |
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| CN112536545A (en) * | 2019-09-20 | 2021-03-23 | 林肯环球股份有限公司 | High chromium creep resistant weld metal for arc welding of thick walled steel members |
| CN113613828A (en) * | 2019-03-26 | 2021-11-05 | 株式会社神户制钢所 | Coated electrode for high Cr ferrite heat-resistant steel |
| CN116445824A (en) * | 2023-04-04 | 2023-07-18 | 湖南瑞华新材料有限公司 | Alloy powder and application thereof in aspect of prolonging service life of strip steel pinch roll |
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| JP7502041B2 (en) * | 2019-02-21 | 2024-06-18 | 株式会社神戸製鋼所 | Welding materials for high Cr ferritic heat-resistant steel |
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| US11772206B2 (en) * | 2019-09-20 | 2023-10-03 | Lincoln Global, Inc. | High chromium creep resistant weld metal for arc welding of thin walled steel members |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109440011A (en) * | 2018-12-27 | 2019-03-08 | 攀钢集团江油长城特殊钢有限公司 | A kind of nitrogenous welding wire steel of vacuum induction furnace smelting low-alloy and its smelting process |
| CN113613828A (en) * | 2019-03-26 | 2021-11-05 | 株式会社神户制钢所 | Coated electrode for high Cr ferrite heat-resistant steel |
| CN112536545A (en) * | 2019-09-20 | 2021-03-23 | 林肯环球股份有限公司 | High chromium creep resistant weld metal for arc welding of thick walled steel members |
| CN110788518A (en) * | 2019-11-05 | 2020-02-14 | 上海欣冈贸易有限公司 | Welding metal material |
| CN111421262A (en) * | 2020-03-27 | 2020-07-17 | 上海大西洋焊接材料有限责任公司 | Low-alloy steel argon arc welding wire for primary loop main equipment of nuclear power station |
| CN116445824A (en) * | 2023-04-04 | 2023-07-18 | 湖南瑞华新材料有限公司 | Alloy powder and application thereof in aspect of prolonging service life of strip steel pinch roll |
| CN116445824B (en) * | 2023-04-04 | 2024-09-06 | 湖南瑞华新材料有限公司 | Alloy powder and application thereof in aspect of prolonging service life of strip steel pinch roll |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6829090B2 (en) | 2021-02-10 |
| KR102084932B1 (en) | 2020-03-05 |
| JP2018122329A (en) | 2018-08-09 |
| KR20180089310A (en) | 2018-08-08 |
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Application publication date: 20180807 |