CN105081603B - Ni based alloy flux-cored wires - Google Patents
Ni based alloy flux-cored wires Download PDFInfo
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- CN105081603B CN105081603B CN201510172512.0A CN201510172512A CN105081603B CN 105081603 B CN105081603 B CN 105081603B CN 201510172512 A CN201510172512 A CN 201510172512A CN 105081603 B CN105081603 B CN 105081603B
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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
- B23K35/24—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
- B23K35/3033—Ni as the principal constituent
- B23K35/304—Ni as the principal constituent with Cr as the 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
- B23K35/02—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
- B23K35/0266—Rods, electrodes, wires flux-cored
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
- B23K35/3608—Titania or titanates
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- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The present invention provides a kind of in the all-position welding of Ni based alloys and 9%Ni steel, highly corrosion resistant austenite stainless steel etc., excellent weld bead shape can be obtained, and arc stability and slag fissility are excellent, can obtain with good intensity, toughness, resistance to defective, high-temperature cracking resistance, the Ni based alloys of the welding metal of corrosion resistance flux-cored wire.It is a kind of Ni based alloy flux-cored wires that solder flux is filled with the crust of Ni based alloys, it is characterised in that in terms of welding wire gross mass, contain Ni, Cr, Mo, Nb by ormal weight, in the solder flux, in terms of welding wire gross mass, contain TiO by ormal weight2、SiO2、ZrO2、MnO2、Al2O3, also, in the solder flux, in terms of welding wire gross mass, in terms of alkali metal scaled value, the alkali metal compound for containing Na, K, Li by ormal weight contains fluoride in terms of fluorine scaled value by ormal weight.
Description
Technical field
The present invention relates to the Ni used in the welding of 9%Ni steel, Ni based alloys, highly corrosion resistant austenite stainless steel etc.
Based alloy flux-cored wire.
Background technology
Using Ni based alloys as the welding material of composition, such as being used as chemical complete set of equipments, oil relevant device
The welding of Ni based alloys, highly corrosion resistant austenite stainless steel that structural elements is used etc..Or, using Ni based alloys as composition
Welding material, is used as the welding of the 9%Ni steel that the structural elements such as the storage tank of LNG, liquid nitrogen or liquid oxygen etc. are used etc..
In recent years, on special welding material as Ni based alloys, compared with shielded arc welding and TIG welderings, use
It can expect that the gas shielded arc welding of the Ni based alloy flux-cored wires of higher operating efficiency is promoted.
Here, in the gas shielded arc welding for having used Ni based alloy flux-cored wires, Ni based alloys are because welding metal
Fusing point it is low, so gas is easily captured with the interface of the slag of solidification, there is welding metal easily to occur as arc crater
Problem.In addition, also attempting to improve other performances.
Thus, for example Patent Document 1 discloses a kind of Ni based alloys flux-cored wire, it is by adjusting TiO2、ZrO2、
SiO2Addition and addition MnO2To improve resistance to arc crater.In addition, in the Ni based alloy flux-cored wires, MnO2Addition tool
There is the effect for promoting the slagging tap of Si (slag out), make the Si reductionizations in welding metal, it may have put forward high-temperature cracking resistance
High effect.
In addition, for example Patent Document 2 discloses a kind of Ni based alloys flux-cored wire, it is with TiO2、SiO2、ZrO2
Based on slag forming agent in, addition make the MnO that the setting temperature of slag is reduced2, so that in horizontal fillet welding, transverse weld
In, change resistance to arc crater.
In addition, for example Patent Document 3 discloses a kind of Ni based alloys flux-cored wire, it is welded as with 9%Ni steel
Object, by the welding metal as Hastelloy (Hastelloy) system, so as to obtain excellent resistance to solidification cracking,
Low-temperature flexibility.In addition, the Ni based alloys flux-cored wire is by by TiO2、SiO2、MnO、ZrO2, alkali metal addition balance it is optimal
Change, so as to have excellent welding operation in all positon.
In addition, for example Patent Document 4 discloses a kind of Ni based alloys flux-cored wire, it is by by TiO2、Al2O3、
SiO2, Fe oxides, Mn oxides, alkali metal, the addition of fluoride optimize so that the fusion of welding bead is good, splash hair
Raw amount is few, and the welding operation such as covering property, fissility of slag is excellent.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2011-140064 publications
Patent document 2：Japanese Unexamined Patent Publication 2008-246507 publications
Patent document 3：Japanese Unexamined Patent Publication 2007-203350 publications
Patent document 4：Japanese Unexamined Patent Publication 6-198488 publications
Invent problem to be solved
But, the problem of having following in existing technology.
In the Ni based alloy flux-cored wires described in patent document 1,2, due to the MnO as low melting point oxide2Add
Plus, cause the reduction of slag setting temperature.Therefore, described in patent document 1,2 Ni based alloys flux-cored wire is in vertical position of welding and faces upward
The weld bead shape that welding position is put has room for improvement.
Ni based alloys flux-cored wire described in patent document 3 is also due to MnO addition is high, so slag setting temperature drops
It is low.Therefore, the Ni based alloys flux-cored wire described in patent document 3 has improvement in the weld bead shape of vertical position of welding and overhead position
Leeway.
In Ni based alloy flux-cored wires described in patent document 4, ZrO is free of in slag composition2.Therefore, the institute of patent document 4
The Ni based alloy flux-cored wires stated, have room for improvement in the weld bead shape of vertical position of welding and overhead position.ZrO2Fusing point is high, leads to
Addition is crossed, it is effective for vertical position welding, the improvement of the weld bead shape of overhead position.In addition, the Ni based alloy medicine cores described in patent document 4
Welding wire, the completely welding operation not to vertical position welding, overhead position are studied.
In addition, in existing technology, being also actively working to arc stability, slag fissility, which kind of welding bead shape being obtained
The welding operation of shape etc., and intensity, toughness, resistance to defective, high-temperature cracking resistance, corrosion resistance etc. welding metal performance
Improve.However, it may be desirable to which this welding operation and welding metal performance are existed side by side, and welding operation and welding metal performance enter one
Step is improved.Further, so-called resistance to defective, is exactly the characteristic that stomata, arc crater, slag inclusion etc. are difficult to occur.
The content of the invention
Therefore, problem of the invention is that it is in Ni based alloys and 9%Ni there is provided a kind of flux-cored wire of Ni based alloys
In the all-position welding of steel, highly corrosion resistant austenite stainless steel etc., excellent weld bead shape, and arc stability can be obtained
Property and slag fissility are excellent, can obtain with good intensity, toughness, resistance to defective, high-temperature cracking resistance, corrosion resistance
Welding metal.
Means for solving the problems
It is that the present inventor etc. concentrates on studies as a result, being found that following item.
Ni based alloys have in all-position welding because fusing point is low, the easy sagging feature of molten metal.Cause
This, in order to obtain flat weld bead shape in all-position welding, it is necessary to improve the setting temperature of slag, is pressed down with the slag of solidification
Molten metal processed is not sagging.In order to improve the setting temperature of slag, in slag forming agent, adding for dystectic oxide is improved
Dosage, the as far as possible oxide without low melting point.Based on such idea, have developed one kind can both maintain high-melting-point
Slag composition, there is slag to peel off the Ni based alloy flux-cored wires of also excellent slag composition again.
In order to solve the problem, in the present invention, following technological means is proposed.
The Ni based alloy flux-cored wires of the present invention, are the Ni based alloy medicine cores that solder flux is filled with the crust of Ni based alloys
Welding wire, it is characterised in that in terms of welding wire gross mass, contain Ni：52~65 mass %, Cr：18~23 mass %, Mo：7.0~
10.0 mass %, Nb：3.0~5.0 mass %, in the solder flux, in terms of welding wire gross mass, contain TiO2：4.0~12.0 matter
Measure %, SiO2：0.05~0.60 mass %, ZrO2：1.0~4.0 mass %, MnO2：Below 0.3 mass %, Al2O3：1.0 matter
Below % is measured, also, in the solder flux, in terms of welding wire gross mass, Na, K, Li alkali metal compound are with alkali metal scaled value
Meter is total to contain 0.1~2.0 mass %, and fluoride contains 0.1~1.0 mass % in terms of fluorine scaled value.
According to this composition, Ni based alloys flux-cored wire (it is following, suitably referred to as flux-cored wire or be only called welding wire) it is logical
The Ni of addition ormal weight is crossed, austenite structure is stabilized, toughness is improved, by adding Cr, Mo, Nb of ormal weight, welding
The intensity and corrosion resistance of metal are improved.
In addition, the TiO that flux-cored wire passes through ormal weight2, the good slag of covering property can be formed uniformly, arc stability is carried
Height, and the rising of slag fusing point, the weld bead shape in all-position welding are flat.In addition, the SiO by adding ormal weight2, slag
Viscosity raising, slag covering become uniform, slag fissility is good.In addition, the ZrO by adding ormal weight2, slag solidification
In advance, flat weld bead shape can be obtained in vertical position of welding and overhead position.In addition, by controlling MnO2Addition, can
Suppress the reduction of slag setting temperature, the deterioration of the weld bead shape of all-position welding is suppressed.In addition, by controlling Al2O3Add
Dosage, can suppress the deterioration of slag stripping.
In addition, flux-cored wire is by the alkali metal compound by ormal weight addition Na, K, Li, arc stability is improved, and is led to
Cross and add fluoride by ormal weight, gas hole defect caused by moisture can be reduced.
The Ni based alloy flux-cored wires of the present invention contain Ca compounds, Ba compounds and Bi compounds and formed as slag
Agent, on these compounds in terms of welding wire gross mass, is respectively preferably and is calculated as with Ca scaled values below 0.5 mass %, changed with Ba
Calculation value is calculated as below 0.5 mass %, is calculated as with Bi scaled values below 0.01 mass %.
According to this composition, flux-cored wire can suppress slag fusing point by controlling the addition of Ca compounds, Ba compounds
Reduction, the deterioration of the welding operation of all positon is suppressed.Thus, slag is readily obtained to peel off more preferably, it is more flat in all positon
Smooth weld bead shape.In addition, the addition by controlling Bi compounds, can suppress welding metal high-temperature cracking resistance it is bad
Change.
The Ni based alloy flux-cored wires of the present invention, contain oxide and carbonate, in the oxidation as slag forming agent
Among thing and carbonate, on Ti, Zr, Si, Ca, Mn, Ba oxide and Ti, Zr, Si, Ca, Mn, Ba carbonate, with oxygen
Compound scaled value meter, is preferably (TiO2+ZrO2)/(SiO2+CaO+MnO2+BaO)：5~50.
According to this composition, flux-cored wire is by providing (TiO2+ZrO2)/(SiO2+CaO+MnO2+ BaO), all positon
Welding operation and the fusion of slag are existed side by side.Thereby, it is possible to obtain more flat weld bead shape, slag fissility in all positon
It is better.
Invention effect
The Ni based alloy flux-cored wires of the present invention, in Ni based alloys, 9%Ni steel and highly corrosion resistant austenite stainless steel etc.
All-position welding in, can obtain the excellent welding metal of weld bead shape, and arc stability and slag peel off it is excellent.Separately
Outside, Ni based alloy flux-cored wires of the invention, can be obtained with good intensity, toughness, resistance to defective, high temperature resistant crackle
Property, the welding metal of corrosion resistance.
Embodiment
Hereinafter, the mode for the implementation of the present invention is explained.
The flux-cored wire of the present invention is the Ni based alloy flux-cored wires that solder flux is filled with the crust of Ni based alloys.And
And, the flux-cored wire is contained in Ni, Cr, Mo, Nb, solder flux in gross mass by ormal weight, in terms of welding wire gross mass, by regulation
Amount contains TiO2、SiO2、ZrO2、MnO2、Al2O3, also, in solder flux, in terms of welding wire gross mass, in terms of alkali metal scaled value,
Contain Na, K, Li alkali metal compound by ormal weight, in terms of fluorine scaled value, contain fluoride by ormal weight.
Hereinafter, the composition restriction reason for flux-cored wire is illustrated.
<Ni：52~65 mass %>
Ni is used to make austenite structure stabilize and add.When Ni contents are less than 52 mass %, the content of other elements
Relative increase, organizes unstable, toughness deterioration.On the other hand, if addition of the Ni contents higher than 65 mass %, Cr, Mo, Nb etc.
The relative step-down of amount, corrosion resistance, strength deterioration.Therefore, the Ni contents in flux-cored wire, 52~65 matter are calculated as with welding wire gross mass
Measure %.From the viewpoint of making tissue more stable, Ni contents are preferably more than 55 mass % more preferably more than 58 mass %.
In addition, from the viewpoint of further raising corrosion resistance, intensity, preferably below 62 mass %, more preferably 61 mass %
Below.
<Cr：18~23 mass %>
Cr has the effect that the intensity and corrosion resistance that make welding metal are improved.When Cr contents are less than 18 mass %, corrosion resistant
Corrosion is deteriorated.On the other hand, if Cr contents are higher than 23 mass %, the toughness of welding metal is deteriorated.Therefore, in flux-cored wire
Cr contents, 18~23 mass % are calculated as with welding wire gross mass.From the viewpoint of further raising corrosion resistance, Cr contents are preferred
For more than 19 mass %, more preferably more than 20 mass %.In addition, from the viewpoint of further raising toughness, preferably 22
Below quality %, more preferably below 21.5 mass %.
<Mo：7.0~10.0 mass %>
Mo is identical with Cr, the effect improved with the intensity for making welding metal and corrosion resistance.Mo contents are less than 7.0 matter
When measuring %, corrosion resistance deterioration.On the other hand, if Mo contents are higher than 10.0 mass %, the toughness of welding metal is deteriorated.Cause
This, the Mo contents in flux-cored wire are calculated as 7.0~10.0 mass % with welding wire gross mass.From further raising corrosion resistance
Viewpoint is set out, and Mo contents are preferably more than 7.5 mass % more preferably more than 8.0 mass %.In addition, from further improving tough
From the viewpoint of property, preferably below 9.0 mass %, more preferably below 8.8 mass %.
<Nb：3.0~5.0 mass %>
Nb is solution strengthening element, with the effect for improving the intensity of welding metal.Nb contents are less than 3.0 mass %
When, strength deterioration.On the other hand, if Nb contents are higher than 5.0 mass %, the toughness of welding metal is deteriorated.Therefore, flux-cored wire
In Nb contents, 3.0~5.0 mass % are calculated as with welding wire gross mass.From the viewpoint of further raising intensity, Nb contents are excellent
Elect as more than 3.15 mass %, more preferably more than 3.3 mass %.In addition, from the viewpoint of further raising toughness, preferably
For below 4.5 mass %, more preferably below 4.2 mass %.
<TiO2：It is 4.0~12.0 mass % in solder flux>
TiO2It is the principal component of slag forming agent, forms the uniform and good slag of covering property, with makes arc stability
The effect of raising.In addition, TiO2Addition also have improve slag fusing point, the effect for making the weld bead shape in all-position welding flat
Really.TiO2When content is less than 4.0 mass %, it cannot get above-mentioned effect.On the other hand, if TiO2Content is higher than 12.0 mass %,
Then solder flux is very infusibilized, and solder flux post does not melt, the reason for generation as slag inclusion.Therefore, the TiO in solder flux2Content, with welding wire
Gross mass is calculated as 4.0~12.0 mass %.From the viewpoint of above-mentioned effect is further improved, TiO2Content is preferably 5.0
More than quality %, more preferably more than 5.5 mass %.In addition, from making solder flux be easier from the viewpoint of fusing, preferably 10.0
Below quality %, more preferably below 9.0 mass %.
<SiO2：It is 0.05~0.60 mass % in solder flux>
SiO2The viscosity of slag is improved, makes slag covering uniform, so that with making the good effect of slag fissility.SiO2
When content is less than 0.05 mass %, it cannot get the effect above.On the other hand, if SiO2Content is higher than 0.60 mass %, then SiO2Quilt
Ti etc. strong deoxidant element reduction, therefore cause the increases of the Si in welding metal, cause the deterioration of the toughness of welding metal.Separately
Outside, slag fusing point is reduced, the weld bead shape deterioration of all-position welding.Therefore, the SiO in solder flux2Content, in terms of welding wire gross mass
For 0.05~0.60 mass %.From the viewpoint of above-mentioned effect is further improved, SiO2Content is preferably 0.20 mass %
More than, more preferably more than 0.30 mass %.In addition, from the further viewpoint for improving toughness and making the better sight of weld bead shape
Point sets out, preferably below 0.55 mass %, more preferably below 0.50 mass %.
<ZrO2：It is 1.0~4.0 mass % in solder flux>
ZrO2Accelerate slag solidification, with the effect of flat weld bead shape can be obtained in vertical position of welding and overhead position
Really.ZrO2When content is less than 1.0 mass %, it is impossible to fully obtain above-mentioned effect.On the other hand, if ZrO2Content is higher than 4.0 matter
% is measured, then causes the deterioration of slag covering property, slag fissility is significantly deteriorated.Therefore, the ZrO in solder flux2Content, it is total with welding wire
Quality is calculated as 1.0~4.0 mass %.From the viewpoint of above-mentioned effect is further improved, ZrO2Content is preferably 1.5 matter
Measure more than %, more preferably more than 1.8 mass %.In addition, from the viewpoint of further raising slag fissility, being preferably
Below 3.0 mass %, more preferably below 2.8 mass %.
<MnO2：It is below 0.3 mass % in solder flux>
MnO2Make the reduction of slag setting temperature, deteriorate the weld bead shape of all-position welding.Therefore, the MnO in solder flux2Contain
Amount, is calculated as below 0.3 mass % with welding wire gross mass.From the viewpoint of the further deterioration for suppressing weld bead shape, MnO2Contain
Amount is preferably below 0.1 mass %, more preferably below 0.05 mass %.Further, lower limit does not have special provision, is preferably free of
MnO2.But, because MnO2Inevitably it is mixed into, so substantial 0.001 mass % is lower limit.
<Al2O3：It is below 1.0 mass % in solder flux>
Al2O3Cause the deterioration of slag fissility.Therefore, the Al in solder flux2O3Content, 1.0 matter are calculated as with welding wire gross mass
Measure below %.From the viewpoint of the further deterioration for suppressing slag fissility, Al2O3Content is preferably below 0.8 mass %,
More preferably below 0.6 mass %.Further, lower limit does not have special provision, preferably without Al2O3.But, because Al2O3Can not
It is mixed into can avoiding, so substantial 0.001 mass % is lower limit.
<Alkali metal scaled value in Na, K, Li alkali metal compound it is total：It is 0.1~2.0 mass % in solder flux
>
The alkali metal such as Na, K, Li have the effect for improving arc stability.It can be used as fluoride, composite oxides
Addition, converted with alkali metal, by Na, K, Li add up to 0.1~2.0 mass % in the way of contain.The total of Na, K, Li is less than
During 0.1 mass %, arc stability deterioration.On the other hand, if higher than 2.0 mass %, the reduction of slag fusing point, all-position welding
Weld bead shape deterioration.Therefore, Na, K, Li's in solder flux is total, and 0.1~2.0 mass % is calculated as with welding wire gross mass.From making
From the viewpoint of arc stability is further improved, the total of Na, K, Li is preferably more than 0.3 mass %, more preferably 0.5 matter
Measure more than %.In addition, from the viewpoint of making weld bead shape better, preferably below 1.5 mass %, more preferably 1.2 matter
Measure below %.
<The fluorine scaled value of fluoride：It is 0.1~1.0 mass % in solder flux>
Fluorine has the effect of gas hole defect caused by reduction moisture.When the fluorine scaled value of fluoride is less than 0.1 mass %, obtain
Less than the minimizing effect of gas hole defect.On the other hand, if the fluorine scaled value of fluoride is higher than 1.0 mass %, arc stability
Deterioration.In addition, the weld bead shape deterioration of all-position welding.Therefore, the fluorine scaled value of the fluoride in solder flux, with welding wire gross mass
It is calculated as 0.1~1.0 mass %.From the viewpoint of the further raising of minimizing effect of gas hole defect is made, the fluorine conversion of fluoride
Value is preferably more than 0.3 mass %, more preferably more than 0.4 mass %.In addition, from making arc stability and weld bead shape better
From the viewpoint of good, preferably below 0.9 mass %, more preferably below 0.8 mass %.
Further, also included in alkali metal compound and alkali metal fluosilicate is also included in alkali metal fluoride, " fluoride " here
Compound.I.e., here also containing the fluoride beyond NaF, KF, LiF in " fluoride ".
In addition, the surplus of solder flux is Mn, W, Fe and inevitable impurity.
<Surplus：Inevitable impurity>
It is inevitable impurity as the surplus of the overall composition of flux-cored wire.It is used as inevitable impurity, example
Such as, C, Si, P, S, Cu, V, N etc. can be enumerated.
In flux-cored wire, contain Ca compounds, Ba compounds and Bi compounds as slag forming agent, on these chemical combination
Thing, in terms of welding wire gross mass, ormal weight preferably respectively in terms of Ca scaled values, Ba scaled values, Bi scaled values.
<Ca scaled values on Ca compounds：Below 0.5 mass %>
Ca makes the reduction of slag fusing point, deteriorates the welding operation of all positon.By reducing Ca, slag peels off more preferable, appearance
More flat weld bead shape is easily obtained in all positon.Therefore, the content of Ca compounds, in terms of welding wire gross mass, is preferably changed with Ca
Calculation value is calculated as below 0.5 mass %.Go out from the further viewpoint for improving welding operation and the viewpoint for making weld bead shape better
Hair, the content of Ca compounds is more preferably, is calculated as with Ca scaled values below 0.1 mass %, more preferably, with Ca scaled values
It is calculated as below 0.05 mass %.Further, lower limit does not have special provision, preferably without Ca compounds.But, Ca can be inevitable
Ground is mixed into, therefore substantially counts 0.001 mass % as lower limit using Ca scaled values.
<Ba scaled values on Ba compounds：Below 0.5 mass %>
Ba makes the reduction of slag fusing point, deteriorates the welding operation of all positon.By reducing Ba, slag stripping is better,
More flat weld bead shape is easily obtained in all positon.Therefore, the content of Ba compounds, in terms of welding wire gross mass, preferably with Ba
Scaled value is calculated as below 0.5 mass %.From the further viewpoint for improving welding operation and make the better viewpoint of weld bead shape
Set out, the content of Ba compounds is more preferably, be calculated as with Ba scaled values below 0.1 mass %, more preferably, converted with Ba
Value is calculated as below 0.05 mass %.Further, lower limit does not have special provision, preferably without Ba compounds.But, because Ba can not
It is mixed into avoiding, so substantially counting 0.001 mass % as lower limit using Ba scaled values.
<Bi scaled values on Bi compounds：Below 0.01 mass %>
Bi is finally solidifying domain segregation in welding metal as low melting point oxide, makes the high temperature resistant crackle of welding metal
Property deterioration.Therefore, the content of Bi compounds, in terms of welding wire gross mass, is preferably calculated as below 0.01 mass % with Bi scaled values.From
Make from the viewpoint of high-temperature cracking resistance further improves, the content of Bi compounds is more preferably, and 0.001 is calculated as with Bi scaled values
Below quality %, more preferably, in below 0.0005 mass % in terms of Bi scaled values.Further, lower limit is not advised especially
It is fixed, preferably without Bi compounds.But, because Bi is inevitably mixed into, 0.0001 matter substantially in terms of Bi scaled values
Amount % is lower limit.
In flux-cored wire, contain oxide and carbonate as slag forming agent, among the oxide and carbonate,
It is excellent in terms of oxide scaled value on Ti, Zr, Si, Ca, Mn, Ba oxide and Ti, Zr, Si, Ca, Mn, Ba carbonate
Select (TiO2+ZrO2)/(SiO2+CaO+MnO2+ BaO) in prescribed limit.
<In terms of the oxide scaled value of the oxide on Ti, Zr, Si, Ca, Mn, Ba and carbonate, (TiO2+ZrO2)/
(SiO2+CaO+MnO2+BaO)：5~50>
Ti, Zr, Si, Ca, Mn, Ba for being added by adjusting as slag forming agent balance, can make all positon
Welding operation and the fusion of slag are existed side by side.Thereby, it is possible to obtain more flat weld bead shape, slag fissility in all positon
It is better.In terms of the oxide scaled value of the oxide on Ti, Zr, Si, Ca, Mn, Ba and carbonate, if (TiO2+
ZrO2)/(SiO2+CaO+MnO2+ BaO) be more than 5, then slag solidification will not become slow, and the welding operation of all positon is improved.
On the other hand, if (TiO2+ZrO2)/(SiO2+CaO+MnO2+ BaO) be less than 50, then the fusion of slag is easily improved, for
Slag fissility is easier to maintain realistic scale.Therefore, with the oxide and the oxygen of carbonate on Ti, Zr, Si, Ca, Mn, Ba
Compound scaled value meter, preferably (TiO2+ZrO2)/(SiO2+CaO+MnO2+ BaO) it is 5~50.Welding operation is improved from further
From the viewpoint of, (TiO2+ZrO2)/(SiO2+CaO+MnO2+ BaO) it is more preferably more than 10, more preferably more than 12.Separately
Outside, from being easier to make the fusion of slag to improve, be further susceptible to maintain slag fissility from the viewpoint of, more preferably 40 with
Under, more preferably less than 30.
Further, TiO here2、SiO2、ZrO2、MnO2, do not contain the TiO in the solder flux except the explanation2、SiO2、
ZrO2、MnO2Material in addition.In addition, the formula is exported on experiment basis.
The flux-cored wire of present invention mentioned above, in the welding of the cryogenic steel such as 9%Ni steel, various high Ni alloys,
Ar+CO can be suitable for use with2Gas shielded arc welding of mixed gas etc..
<The manufacture method of flux-cored wire>
As the manufacture method of flux-cored wire, have and be allowed to roll and shape after spreading solder flux along the length direction of strip
For circular cross-section and carry out the method for wire drawing, the method that filling flux carries out wire drawing into the steel pipe of major diameter.But, because
Either method, can so being manufactured with either method all without the influence present invention.It is any in addition with seamed and seamless
.
【Embodiment】
Hereinafter, for the embodiment being within the scope of the invention, by its effect and the comparison departed from the scope of the present invention
Example is compared explanation.
First, using the crust of the chemical composition shown in table 1 below, chemistry of the trial-production with the welding wire shown in table 2 below
The flux-cored wire of composition.The chemical composition of welding wire is entirely the quality % relative to welding wire gross mass.The line footpath of flux-cored wire is
1.2mm, solder flux rate is 17~27 mass %.
In table, the numerical value of the scope of the present invention is unsatisfactory for, logarithm value is drawn underscore and represented.In addition, " Na+K+Li " be Na,
Alkali metal scaled value in K, Li alkali metal compound it is total, F, Ca, Ba, Bi are the scaled value of these compounds respectively.
In addition, formula is " (TiO2+ZrO2)/(SiO2+CaO+MnO2+BaO)”。
【Table 1】
【Table 2】
Using these flux-cored wires, as welding operation, arc stability, slag fissility, upward welding in the vertical position position are evaluated
The weld bead shape put.In addition, as welding metal performance, tensile strength is evaluated, toughness, resistance to defective, high-temperature cracking resistance, resistance to
Corrosivity.
Welding operation is evaluated by the fillet welding of upward welding in the vertical position.Specifically, protective gas uses 80%Ar-20%
CO2, welded with welding current (150~180A), arc voltage (24~27V), evaluate welding operation.
Tensile strength, the toughness of welding metal, carry out the experiment according to AWS B4.0 to evaluate.
The resistance to defective of welding metal, the RT for carrying out AWS A5.11 tests to evaluate.
The high-temperature cracking resistance of welding metal, carries out FISCO cracking tests, real immediately for the welding bead surface after welding
Apply and be impregnated with crank detection test, investigation has flawless to occur and evaluated.
The corrosion resistance of welding metal is evaluated using ASTM G48 C methods.
Metewand is as follows.
<Arc stability>
It is spray transfer on arc stability, molten drop is granule and splashes few for extremely good (◎), close to injection
The droplet transfer of transition, splash fewer for good (zero), be thick drop (globular) transition, molten drop is big and occurs a large amount of fly
Splash for bad (×).
<Slag fissility>
On slag fissility, that slag is peeled off naturally is extremely good (◎), and what is gently beaten and peeled off with hammer is
Well (zero), slag hot glue can not be peeled off on welding bead surface for bad (×).
<The weld bead shape of upward welding in the vertical position position>
On the weld bead shape of upward welding in the vertical position position, the determinating reference of AWS A5.34 angle welding is met, and as flat
Weld bead shape for extremely good (◎), meet AWS A5.34 angle welding determinating reference for good (zero), be unsatisfactory for
AWSA5.34 determinating reference, is bad (×) as convex welding bead.
<Tensile strength>
Tensile strength, that can obtain more than 690MPa is good (zero), is bad (×) less than 690MPa.
<Toughness>
On toughness, with -196 DEG C of pendulum impact test evaluation.It can be that more than 50J is good (zero) to absorb, and be less than
50J for bad (×).
<Resistance to defective>
On resistance to defective, the qualified benchmark for meeting AWS A5.11 RT experiments is good (zero), is unsatisfactory for AWS
The qualified benchmark of A5.11 RT experiments for bad (×).
<High-temperature cracking resistance>
On high-temperature cracking resistance, evaluated with FISCO cracking tests.With welding current 200A, speed of welding 40cpm
Tested, do not occur crackle for good (zero), occur crackle for bad (×).
<Corrosion resistance>
On corrosion resistance, in ASTM G48 C methods, CPT >=50 DEG C are good (zero), CPT<50 DEG C to be bad
(×)。
Overall merit is, welding operation is entirely ◎, and welding metal performance is entirely zero for ◎, welding operation
Among any one above is zero, and welding metal performance is entirely welding operation and welding metal performance zero for zero
Among, have × for ×.These results are shown in table 3.
【Table 3】
As shown in table 3, welding operation, the welding gold for meeting No.1~16 of the scope of the present invention are functional.It is another
Aspect, being unsatisfactory for No.17~35 of the scope of the present invention turns into following result.
No.17 is because Mo contents are low, the corrosion resistance deterioration of welding metal.No.18 is because Na+K+Li content
It is low, so arc stability is deteriorated.No.19 is because Nb contents are low, and the tensile strength of welding metal is significantly deteriorated.No.20
Because TiO2Content is high, so solder flux is difficult to melt, resistance to defective deterioration.
No.21 is because Cr contents are low, the corrosion resistance deterioration of welding metal.No.22 is because Na+K+Li content
Height, so slag fusing point is reduced, the weld bead shape deterioration of upward welding in the vertical position position.No.23, can not be appropriate because Ni contents are high
Add Cr, Mo, tensile strength and the corrosion resistance deterioration of welding metal.No.24 is because F contents are low, so while moisture causes
Stomata easily occur, the deterioration of resistance to defective.
No.25 is because Mo contents are high, the toughness deterioration of welding metal.No.26 is because Cr contents are high, welding gold
The toughness deterioration of category.No.27 is because SiO2Content is low, so slag fissility is deteriorated.No.28 is because Nb contents are high, weldering
Connect the toughness deterioration of metal.No.29 is because ZrO2Content is high, so slag fissility is deteriorated.No.30 is because SiO2Content is high, institute
With the reduction of slag fusing point, the weld bead shape deterioration of upward welding in the vertical position position.In addition, in welding metal Si amounts increase and toughness is bad
Change.
No.31 is because Ni contents are low, toughness deterioration.In addition, because Al2O3Content is high, so slag fissility is bad
Change.No.32 is because TiO2Content is low, so the weld bead shape deterioration of upward welding in the vertical position position.No.33 is because ZrO2Content is low, so
The weld bead shape deterioration of upward welding in the vertical position position.No.34 is because F contents are high, arc stability, the welding bead of upward welding in the vertical position position
Shape is deteriorated.No.35 is because MnO2Content is high, so the weld bead shape deterioration of upward welding in the vertical position position.
More than, for the present invention displaying embodiment and embodiment be illustrated in detail, but the present invention purport not
Limited by the content, its interest field must be based on the description extensive interpretation of the scope of Patent right requirement.Further, it is of the invention
Content it is of course possible to being changed extensively based on described description, changed.
Claims (2)
1. a kind of Ni based alloys flux-cored wire, it is characterised in that solder flux is filled with the crust of Ni based alloys,
In terms of welding wire gross mass, contain
Ni：52~65 mass %,
Cr：18~23 mass %,
Mo：7.0~10.0 mass %,
Nb：3.0~5.0 mass %,
In the solder flux, in terms of welding wire gross mass, contain
TiO2：4.0~12.0 mass %,
SiO2：0.05~0.60 mass %,
ZrO2：1.0~4.0 mass %,
MnO2：Below 0.3 mass %,
Al2O3：Below 1.0 mass %, also,
In the solder flux, in terms of welding wire gross mass,
Na, K, Li alkali metal compound are added up in terms of alkali metal scaled value and contain 0.1~2.0 mass %, and fluoride is changed with fluorine
Calculation value meter contains 0.1~1.0 mass %,
Wherein, contain oxide and carbonate as slag forming agent, among the oxide and carbonate, on Ti, Zr,
Si, Ca, Mn, Ba oxide and Ti, Zr, Si, Ca, Mn, Ba carbonate, in terms of oxide scaled value, (TiO2+ZrO2)/
(SiO2+CaO+MnO2+ BaO): 5~50.
2. Ni based alloys flux-cored wire according to claim 1, it is characterised in that containing Ca compounds, Ba compounds and
Bi compounds are as slag forming agent, in terms of welding wire gross mass, these compounds respectively with Ca scaled values be calculated as 0.5 mass % with
Under, it is calculated as below 0.5 mass %, is calculated as with Bi scaled values below 0.01 mass % with Ba scaled values.
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| JP6746338B2 (en) * | 2016-03-25 | 2020-08-26 | 株式会社神戸製鋼所 | Flux-cored wire for gas shield arc welding |
| JP6794295B2 (en) * | 2017-03-01 | 2020-12-02 | 日鉄溶接工業株式会社 | Flux-cored wire for 9% Ni steel welding |
| JP7027859B2 (en) * | 2017-12-12 | 2022-03-02 | 日本製鉄株式会社 | Gas shield arc Welding flux-cored wire and welding joint manufacturing method |
| AU2018416187A1 (en) * | 2018-03-28 | 2020-08-06 | Nippon Steel Corporation | Method for manufacturing flux-cored wire, flux-cored wire and method for manufacturing welded joint |
| KR102112159B1 (en) * | 2018-12-24 | 2020-05-19 | 현대종합금속 주식회사 | Flux cored wire for austenite stainless steel |
| JP7244340B2 (en) * | 2019-04-22 | 2023-03-22 | 株式会社神戸製鋼所 | Ni-based alloy flux-cored wire |
| CN110480208A (en) * | 2019-09-02 | 2019-11-22 | 兰州理工大学 | Nickel-base alloy bare welding filler metal and preparation method and welding procedure for LNG storage tank welding |
| KR102197134B1 (en) | 2019-11-29 | 2020-12-31 | 주식회사 세아에삽 | Ni based alloy flux cored wire |
| JP7401345B2 (en) * | 2020-02-28 | 2023-12-19 | 株式会社神戸製鋼所 | Ni-based alloy flux-cored wire |
| CN113732560B (en) * | 2021-08-23 | 2023-03-14 | 西安理工大学 | Nickel-chromium-based welding wire capable of effectively controlling heat cracking, method and groove form |
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| JPH04266495A (en) * | 1991-02-19 | 1992-09-22 | Nippon Steel Corp | Flux-cored wire for ni-based alloy welding |
| JPH07116891A (en) * | 1993-01-29 | 1995-05-09 | Kobe Steel Ltd | Ni-based alloy flux cored wire |
| JP4447078B2 (en) * | 1998-08-10 | 2010-04-07 | 株式会社神戸製鋼所 | Ni-based alloy flux cored wire |
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| CN105081620A (en) * | 2015-09-15 | 2015-11-25 | 北京工业大学 | Nickel-base 625 flux-cored wire suitable for full-position welding |
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| KR101708997B1 (en) | 2017-02-21 |
| CN105081603A (en) | 2015-11-25 |
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| JP2015217395A (en) | 2015-12-07 |
| KR20150130930A (en) | 2015-11-24 |
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