CN104907726B - Gas metal arc welding flux-cored wire - Google Patents
Gas metal arc welding flux-cored wire Download PDFInfo
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- CN104907726B CN104907726B CN201410776598.3A CN201410776598A CN104907726B CN 104907726 B CN104907726 B CN 104907726B CN 201410776598 A CN201410776598 A CN 201410776598A CN 104907726 B CN104907726 B CN 104907726B
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/3066—Fe as the principal constituent with Ni as next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—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
-
- 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
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
Abstract
The present invention provides a kind of gas metal arc welding flux-cored wire for the deposited metal that can obtain tensile strength characteristic, toughness and the excellent that drops hammer.Gas metal arc welding flux-cored wire is characterized in that, contains C：0.010~0.100 mass %, Si：0.20~1.00 mass %, Mn：1.00~2.00 mass %, P：0.025 mass % or less, S：0.025 mass % or less, Cu：0.35 mass % or less, Ni：4.00~5.00 mass %, Mo：0.10~0.50 mass %, Ti：0.025~0.075 mass %, surplus are made of Fe and inevitable impurity.
Description
Technical field
The present invention relates to the gas metal arc welding flux-cored wires of the welding for Mn-Mo-Ni steel, Ni steel.
Background technology
In the past, in energy plant or chemical plant, energy source raw material bunkerage pressure vessel or the institutes such as storage container
For the Mn-Mo-Ni steel that uses, Ni steel, it is substantially carried out gas metal arc welding.Moreover, disclosing for carrying out this
The various gas metal arc welding flux-cored wires of the gas metal arc welding of sample.
For example, patent document 1 discloses a kind of gas shield pulsed arc welding method, which is characterized in that in pulsed arc
It is 1.2≤MR≤1.5 Ip≤900A Ib >=30A in peak point current Ip, background current Ib, melting velocity rate MR in weldering
It is welded under conditions of range.
In addition, as the welding wire for the gas shield pulsed arc welding method, a kind of gas shielded arc welding is disclosed
Contain C in terms of weight % relative to welding wire total weight with the chemical composition of welding wire, welding wire：0.02~0.20%, Si：0.2~
2.0%, Mn：0.2~3.0%, P：0.05% or less, S：0.05% or less, Cu：1.5% hereinafter, inevitably ingredient is
0.1% hereinafter, and surplus be substantially made of Fe.
Furthermore disclosed a kind of gas shielded arc welding welding wire, the chemical composition of welding wire relative to welding wire total weight, with
Weight % meters, also contain and are selected from Ni：0.10~5.00%, Cr：0.10~3.00%, Mo：0.05~2.00%, Ti：0.02~
0.50%, B：At least one of 0.0010~0.0300% element, inevitable ingredient is 0.1% hereinafter, and surplus reality
It is made of Fe in matter.
The gas shielded arc welding welding wire is the MAG flux-cored wire used for welding of the Ni containing 0.10~5.00 mass %,
In the best region of impulsive condition in welding, the engineering properties of weld job and molten metal can be taken into account.
In addition, such as patent document 2 discloses a kind of extra-high tension steel gas shielded arc welding welding wire, feature exists
In in terms of quality %, containing C：0.020~0.060%, Si：0.20~0.50%, Mn：1.50~2.50%, Ni：2.90~
3.50%, Cr：0.7~1.5%, Mo：0.30~1.00%, Ti：0.010~0.050%, Al：0.020~0.080%, it will make
It is reduced to P for P, S, N, O, V, Nb of impurity：0.007% or less, S：0.007% or less, N：0.007% or less, O：0.007%
Below, V：0.005% or less, Nb：0.003% hereinafter, surplus is made of Fe and inevitable impurity.
The MAG welding that the extra-high tension steel gas shielded arc welding welding wire is the Ni containing 2.90~3.50 mass % is used
Flux-cored wire contains suitable Ti and Al, so as to take into account welding point tensile strength and toughness by making in welding wire.
Existing technical literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2000-225465 bulletins
Patent document 2：Japanese Unexamined Patent Publication 2001-1181 bulletins
Invention content
Problems to be solved by the invention
But there is a problem of in existing technology following.About patent document 1, the welding of the steel of thick-wall and large-diameter
It would generally implement post weld heat treatment (later, suitably referred to as PWHT (Post Weld Heat Treatment)), but patent text
Offer the engineering properties after the PWHT for not mentioning deposited metal in 1.In addition, the toughness about deposited metal, by vE0 DEG C or
VE-20 DEG C >=/47J is set as good performance, but for it is actual require performance for be insufficient threshold value.
About patent document 2, although the welding of the steel of thick-wall and large-diameter would generally implement PWHT, patent document 2 is simultaneously
The engineering properties after the PWHT of deposited metal is not referred to.
In this way, the characteristic ameliorative way as deposited metal caused by gas metal arc welding, may be used
Using Ni be addition from the various alloying components of representative to welding wire, welding condition adjustment.But it does not show about as follows
The opinion of technology：Even if after the PWHT that can implement in the welding as the steel plate of the major diameter wall thickness of practical operation object, still
Ensure the technology of excellent engineering properties.
In addition, not showing the opinion about following technology：Even if providing in the construction item for paying attention to welding procedure efficiency
Even if part still has especially under the various welding postures comprising upward welding in the vertical position posture and under the welding condition in large-line energy
There is the technology of the deposited metal of excellent mechanical property.
Therefore, the existing group any opinion constituted of applying for a patent can not be solved in various welding postures, heat input range
Under conditions of, even and if still making the problem that tensile strength characteristic, toughness and characteristic of dropping hammer are good after PWHT.
In addition, for existing welding material, the various pressure vessels in energy plant or chemical plant are applicable in
Mn-Mo-Ni steel, Ni steel welding position, exist can not make large-line energy construct and PWHT after deposited metal tension it is strong
Spend the problem that characteristic, toughness and characteristic of dropping hammer are good.
Therefore, problem of the present invention is that, the molten of tensile strength characteristic, toughness and the excellent that drops hammer can be obtained by providing
The gas metal arc welding flux-cored wire of metallisation.
The method used for solving the problem
Present inventor has performed further investigations, as a result, it has been found that following item.
Gas metal arc welding involved by the application (later, being suitably abbreviated as GMAW) is with flux-cored wire in welding wire
In the Ni containing 4.00~5.00 mass %.Even if as after large-line energy construction and PWHT, still make the anti-of the deposited metal
Tensile strength characteristic, toughness and characteristic of dropping hammer are good method, and inventor has obtained " while realizing solution strengthening and being precipitated strong
The addition of the alloying element of change " and " microstructures Control for the field trash being precipitated in process of setting when applying flexibly welding "
Design.
The position for being applicable in GMAW flux-cored wires includes：In machine design, according to the plate thickness of application site, stress distribution
State implements the situation of PWHT；The situation of PWHT is not implemented.Therefore, for the deposited metal, no matter PHWT has
Without and need to make tensile strength, toughness and characteristic of dropping hammer is good.
In general, the microscopic structure by the relevant GMAW of the application deposited metals formed with flux-cored wire is bainite
Main body, tissue are replied because of the implementation of PHWT, and on the one hand its toughness and characteristic of dropping hammer are improved and on the other hand tensile strength
The tendency of reduction is stronger.In addition, the deposited metal formed with flux-cored wire by GMAW, is welded under the conditions of large-line energy
In the case of construction, the notable coarsening of microscopic structure, tensile strength, toughness and characteristic of dropping hammer reduce.
Therefore, it is intended that obtaining following deposited metal：Even if for example pay attention to construction efficiency, in upward welding in the vertical position posture and big
In the case of carrying out welding procedure under the conditions of heat input, still excellent toughness can be shown and the spy that drops hammer in the state of after only welding
Property, after PWHT in the state of with defined tensile strength deposited metal.Moreover, the inventors discovered that the GMAW medicine cores
The chemical composition of welding wire.
Improvement for tensile strength, (1) carbonitride caused by PWHT are dispersed to precipitate the precipitation strength brought, (2)
Solution strengthening or the miniaturization of (3) old γ grain sizes are effective caused by total solid solution of the element into matrix.For reality
Existing (1), it is effective that addition Cr, Nb, V etc. form the alloying element of carbide in crystal grain boundary or crystal grain, but these alloys
The addition of element makes the toughness of deposited metal and characteristic reduction of dropping hammer, therefore not preferably.Therefore, in this application, it is conceived to
It can be achieved at the same time (1) and (2) and influence smaller Mo on toughness.On the other hand, in order to realize (3), it is conceived in welding
Process of setting in form nitride, inhibit γ coarsening Ti by its pinning effect.
In addition, in order to improve toughness and drop hammer characteristic, the high toughening of (4) matrix, (5) old γ grain sizes miniaturization or
(6) miniaturization of lath of bainite is effective.In order to realize (4), addition Ni is effective, and as involved by the application
The Basic Design of MIG flux-cored wire used for welding.In order to realize (5), as described above, being conceived to the addition of Ti.In addition, in order to realize
(6), addition makes A1 transformation temperatures and bainitic transformation start temperature reduce, be effective by the alloying element of lath of bainite miniaturization
, it is conceived to Mn and Ni in the application.
In order to solve above-mentioned problem, technological means below is taken in the present invention.
The gas metal arc welding flux-cored wire of the present invention is characterized in that, contains C：0.010~0.100 matter
Measure %, Si：0.20~1.00 mass %, Mn：1.00~2.00 mass %, P：0.025 mass % or less, S：0.025 mass %
Below, Cu：0.35 mass % or less, Ni：4.00~5.00 mass %, Mo：0.10~0.50 mass %, Ti：0.025~
0.075 mass %, surplus are made of Fe and inevitable impurity.
According to the above configuration, gas metal arc welding with flux-cored wire (hereinafter, properly termed as flux-cored wire or only
Referred to as welding wire) by provide C, Si, Mn, P, S, Cu, Ni, Mo, Ti content, to deposited metal intensity, toughness and drop hammer
Characteristic becomes good.
The present invention gas metal arc welding be preferably with flux-cored wire：Contain C：0.010~0.050 matter
Measure %, Si：0.20~0.50 mass %, Mn：1.10~1.40 mass %, P：0.010 mass % or less, S：0.010 mass %
Below, Cu：0.35 mass % or less, Ni：4.00~4.50 mass %, Mo：0.10~0.30 mass %, Ti：0.050~
0.075 mass %, surplus are made of Fe and inevitable impurity.
According to the above configuration, by the way that the composition of flux-cored wire to be set as preferably providing, to the intensity, tough of deposited metal
Property and characteristic of dropping hammer become more good.
Invention effect
For the gas metal arc welding flux-cored wire of the present invention, even if being capable of providing in big line energy
It measures under execution conditions and after PWHT, the characteristic of deposited metal is still made to improve tremendously, tensile strength characteristic, toughness and fall
Hammer the excellent deposited metal of characteristic into shape.
Description of the drawings
Fig. 1 is the sectional view for the bevel shape for indicating the breadboard used in the evaluation of embodiment.
Fig. 2 is the sectional view of the acquisition position of the tensile test at room temperature piece and Charpy-type test piece that indicate embodiment.
Fig. 3 is the sectional view of the acquisition position for the drop weight test piece for indicating embodiment.
Specific implementation mode
Hereinafter, detailed description of embodiments of the present invention.The flux-cored wire of the present invention is Gas metal pole
Flux-cored wire used in arc welding, contains C：0.010~0.100 mass %, Si：0.20~1.00 mass %, Mn：1.00~
2.00 mass %, P：0.025 mass % or less, S：0.025 mass % or less, Cu：0.35 mass % or less, Ni：4.00~
5.00 mass %, Mo：0.10~0.50 mass %, Ti：0.025~0.075 mass %, surplus is by Fe and inevitable impurity
It constitutes.
In addition, the flux-cored wire of the present invention is preferably to contain C：0.010~0.050 mass %, Si：0.20~0.50 matter
Measure %, Mn：1.10~1.40 mass %, P：0.010 mass % or less, S：0.010 mass % or less, Cu：0.35 mass % with
Under, Ni：4.00~4.50 mass %, Mo：0.10~0.30 mass %, Ti：0.050~0.075 mass %, surplus is by Fe and not
Evitable impurity is constituted.
Hereinafter, the ingredient restriction reason to flux-cored wire illustrates.
<C：0.010~0.100 mass %>
C brings larger impact to the amount of precipitation of the carbide in deposited metal.If the C content in flux-cored wire is less than
0.010 mass %, then the C content in deposited metal be lower, the amount of precipitation of carbide becomes inadequate, be unable to get as defined in it is strong
Degree.On the other hand, if the C content in flux-cored wire is more than 0.100 mass %, the C content in deposited metal becomes excessively high, quenches
Permeability improves, and in addition Carbide Precipitation amount increases, and improves the intensity of deposited metal, toughness and characteristic reduction of dropping hammer.Therefore, medicine core
The C content of welding wire entirety is set as 0.010~0.100 mass %.From the viewpoint of the intensity for further increasing deposited metal, C
Content is preferably 0.015 mass % or more, more preferably 0.020 mass % or more.In addition, from deposited metal is further increased
From the viewpoint of toughness and characteristic of dropping hammer, C content is preferably 0.050 mass % hereinafter, more preferably 0.040 mass % or less.
<Si：0.20~1.00 mass %>
Si, by deposited metal deoxidation, purifying, makes toughness improve while improving the intensity of deposited metal.If medicine core
Si contents in welding wire are less than 0.20 mass %, then the Si contents in deposited metal are lower, strength reduction, in addition deposited metal
In oxygen amount increase, form coarse oxide, therefore toughness and characteristic reduction of dropping hammer.On the other hand, if in flux-cored wire
Si contents are more than 1.00 mass %, then the addition of Si becomes superfluous, and the intensity of deposited metal is significantly got higher, toughness and characteristic of dropping hammer
It reduces.Therefore, the Si contents of flux-cored wire entirety are set as 0.20~1.00 mass %.From further increasing the strong of deposited metal
From the viewpoint of degree, toughness and characteristic of dropping hammer, Si contents are preferably 0.25 mass % or more, more preferably 0.30 mass % with
On.In addition, from the viewpoint of the toughness for further increasing deposited metal and characteristic of dropping hammer, Si contents are preferably 0.50 mass %
Hereinafter, more preferably 0.45 mass % or less.
<Mi：1.00~2.00 mass %>
Mn makes A1 transformation temperatures and bainitic transformation start temperature reduce, and makes bainite structure miniaturization, makes deposited metal
Toughness and characteristic raising of dropping hammer.In addition, Mn is in the same manner as Si, by deposited metal deoxidation, purifying, its toughness is made to improve.If medicine
Mn contents in core welding wire are less than 1.00 mass %, then are unable to get these effects.On the other hand, if the Mn in flux-cored wire contains
Amount becomes superfluous more than 2.00 mass %, the then addition of Mn, and the intensity of deposited metal is significantly got higher, toughness and characteristic drop of dropping hammer
It is low.Therefore, the Mn contents of flux-cored wire entirety are set as 1.00~2.00 mass %.From further increase deposited metal toughness and
From the viewpoint of characteristic of dropping hammer, Mn contents are preferably 1.10 mass % or more, more preferably 1.20 mass % or more.In addition, from
From the viewpoint of further increasing the toughness of deposited metal and characteristic of dropping hammer, Mn contents are preferably 1.40 mass % hereinafter, more excellent
It is selected as 1.30 mass % or less.
<P：0.025 mass % or less, S：0.025 mass % or less>
If the content of P and S more than 0.025 mass %, keeps deposited metal brittle respectively, make its toughness and characteristic drop of dropping hammer
It is low.Therefore, the P content of flux-cored wire entirety and S contents are set as 0.025 mass % or less.From further increasing deposited metal
Toughness and drop hammer from the viewpoint of characteristic, P content and S contents are both preferably 0.010 mass % hereinafter, more preferably 0.008
Quality % or less.It should be noted that although lower limiting value without special provision, does not preferably contain P and S, preferably 0 matter
Measure %.But due to being inevitably mixed into P and S, substantial 0.001 mass % becomes lower limiting value.
<Cu：0.35 mass % or less>
Cu is plated from Cu contained in welding wire and in order to improve welding wire feeding when welding by the methods of plating
Spread on the Cu of welding wire surface.If the Cu contents in flux-cored wire are more than 0.35 mass %, the Cu contents in deposited metal also increase
Add, toughness and characteristic reduction of dropping hammer.Therefore, the Cu contents of flux-cored wire entirety are set as 0.35 mass % or less.From further
From the viewpoint of improving the toughness of deposited metal and characteristic of dropping hammer, Cu contents are preferably 0.25 mass % hereinafter, more preferably
0.20 mass % or less.It should be noted that although lower limiting value can not also contain Cu without special provision, lower limiting value can
Think 0 mass %.But due to being inevitably mixed into Cu, substantial 0.01 mass % becomes lower limiting value.
<Ni：4.00~5.00 mass %>
Ni is the basis of the welding welding wire involved by the application, is made under A1 transformation temperatures and bainitic transformation start temperature
Drop, makes bainite structure miniaturization, and the toughness of matrix is made to improve, and makes the toughness of deposited metal and characteristic raising of dropping hammer.If
Ni contents in flux-cored wire are less than 4.00 mass %, then are unable to fully obtain these effects.On the other hand, if in flux-cored wire
Ni contents be more than 5.00 mass %, then the intensity of deposited metal is significantly got higher, toughness and drop hammer characteristic reduction.Therefore, medicine core
The Ni contents of welding wire entirety are set as 4.00~5.00 mass %.From the sight of the toughness for further increasing deposited metal and characteristic of dropping hammer
Point considers that Ni contents are preferably 4.20 mass % or more, more preferably 4.30 mass % or more.In addition, molten from further increasing
From the viewpoint of the toughness of metallisation and characteristic of dropping hammer, Ni contents are preferably 4.50 mass % hereinafter, more preferably 4.40 matter
Measure % or less.
<Mo：0.10~0.50 mass %>
Mo forms carbide in PWHT, and is solid-solution in matrix, and the intensity of deposited metal is made to improve.If flux-cored wire
In Mo contents be less than 0.10 mass %, then be unable to get defined tensile strength.On the other hand, if the Mo in flux-cored wire contains
Amount excessively increases more than 0.50 mass %, then Carbide Precipitation amount and the solid solution capacity into matrix, the intensity of deposited metal
It significantly gets higher, toughness and characteristic reduction of dropping hammer.Therefore, the Mo contents of flux-cored wire entirety are set as 0.10~0.50 mass %.From
From the viewpoint of the intensity for further increasing deposited metal, Mo contents are preferably 0.15 mass % or more, more preferably 0.20 matter
Measure % or more.In addition, from the viewpoint of the toughness for further increasing deposited metal and characteristic of dropping hammer, Mo contents are preferably 0.30
Quality % is hereinafter, more preferably 0.25 mass % or less.
<Ti：0.025~0.075 mass %>
Ti forms TiN in the process of setting in welding, inhibits γ coarsenings by its pinning effect, makes old γ
Grain size miniaturization.Make the intensity, toughness of deposited metal as a result, and characteristic raising of dropping hammer.If the Ti contents in flux-cored wire are less than
0.025 mass % is then unable to fully obtain these effects.On the other hand, if the Ti contents in flux-cored wire are more than 0.075 matter
% is measured, then the intensity of deposited metal is significantly got higher, toughness and characteristic reduction of dropping hammer.Therefore, the Ti contents of flux-cored wire entirety are set
For 0.025~0.075 mass %.From the viewpoint of the intensity, toughness for further increasing deposited metal and characteristic of dropping hammer, Ti contains
Amount is preferably 0.050 mass % or more, more preferably 0.055 mass % or more.In addition, from the tough of deposited metal is further increased
Property and drop hammer from the viewpoint of characteristic, Ti contents are preferably 0.070 mass % hereinafter, more preferably 0.065 mass % or less.
<Surplus：Fe and inevitable impurity>
The surplus of the ingredient of flux-cored wire is Fe and inevitable impurity.As inevitable impurity, such as can lift
Go out V, W, Nb, Co, Sn, Sb, As etc..These inevitable impurity are allowed in do not interfere effect of the present invention in the range of contain,
Its content is respectively preferably 0.005 mass % or less.
The flux-cored wire of present invention mentioned above is mainly suitable for energy plant or chemical plant, energy source raw material storage are set
The gas metal arc welding of Mn-Mo-Ni steel, Ni steel used in standby interior pressure vessel or storage container etc..
Next, being illustrated to the manufacturing method of the flux-cored wire of the present invention.
The flux-cored wire of the present invention can be manufactured by common method.For example, first, it, will using converter or electric furnace etc.
Molten steel with mentioned component composition manufactures steel (steel billet by the molten steel of gained by continuously casting or ingot casting method etc.
Deng).Next, by after the heat steel of manufacture, implements hot rolling (extrusion calendaring), further implement the cold rolling (cold drawing of dry type
Silk), the former line of welding welding wire (also referred to as steel wire) of manufacture such as φ 5.5mm.Next, by the welding welding wire with former line according to
It needs to implement annealing, pickling, carries out wire drawing, be manufactured into the flux-cored wire with final gage of wire (such as 1.2mm).
Embodiment
Hereinafter, about the embodiment for falling into the scope of the present invention, by its effect and the comparative example for deviateing the scope of the present invention
It is compared to illustrate.
First, ingot casting is carried out to molten steel using electric furnace, and carries out extrusion calendaring, cold-drawn wire, produce the welding of φ 5.5mm
After the former line of welding wire, wire drawing is carried out with former line to the welding welding wire and reaches φ 2.4mm.Next, carrying out intermediate annealing and copper facing
It handles and intermediate wire drawing is made, further implement final wire drawing, implement skin-pass and be coated with lubricating oil, finally produce welding wire
The GMAW flux-cored wires with chemical composition (quality %) shown in table 1 of diameter phi 1.2mm.
Next, using the GMAW flux-cored wires of chemical composition shown in table 1, the breadboard of bevel shape shown in FIG. 1,
It is welded under the welding condition shown in table 2 and table 3, evaluates tensile strength, toughness and the characteristic of dropping hammer of deposited metal totality.It is molten
The engineering properties of metallisation totality is commented both " in the state of after welding " and " after PWHT (615 DEG C × 10h) "
Valence.It should be noted that in table 1, the situation meeting logarithm addition underscore of the scope of the present invention is unsatisfactory for indicate.
Table 1
Table 2
Table 3
For test weld silk gage of wire there are a variety of, but embodiments herein is with a diameter of representative of 1.2mm.For weldering
It connects posture and is laminated for main points, it is contemplated that utilize the welding procedure of real machine and from the viewpoint of execution conditions, it is desirable to
Most stringent of condition evaluates the engineering properties of deposited metal, is set as upward welding in the vertical position posture and each layer 1 is constructed, stacking
Number is set as 4 layers.If upward welding in the vertical position posture can be applied, other postures can also carry out.Common GMAW uses comprising 1~
5% or so O2Ar gas or include 10~20% or so CO2Ar gas, but protective gas in the application form with
Ar-10%CO2To represent, flow is set as 25L/min.In addition, incidentally whether bonding machine with, pulse welding function is unrelated, but this
The bonding machine for being accompanied with pulse welding function is used in the embodiment of application.
In addition, in the evaluation of the tensile strength characteristic of deposited metal totality, provides and exist from the plate thickness central portion of deposited metal
According to tensile test at room temperature piece (the test film diameter of AWS B4.0 acquisitions on sealing wire direction：φ 12.5mm, parallel portion length：
50.0mm).In addition, in the evaluation of toughness, the plate thickness central portion from deposited metal is provided in sealing wire and normal direction (seam side
To) on according to the Charpy-type test pieces of the 2mm-V notches (side notch (side notch)) of AWS B4.0.In addition, in deposition
In the evaluation of the characteristic of dropping hammer of metal, the drop weight test piece according to ASTM E208-2006 is provided.It should be noted that examination of dropping hammer
The experiment plate shape for testing piece is set as P-3 type test films.Each test film acquisition position is shown in Fig. 2 and Fig. 3.
It is 587MPa's or more by TS for the tensile strength characteristic of deposited metal totality in this item embodiment
Test film is evaluated as zero, the test film less than 587MPa is evaluated as ×.In addition, for toughness, impact when by -39 DEG C
3 average values of value (hereinafter, being denoted as vE-39 DEG C) are that the test film of 100J or more is evaluated as ◎, by 55J less than 100J
Test film be evaluated as zero, the test film less than 55J is evaluated as ×.In addition, for characteristic of dropping hammer, by RTNDTIt is -75
DEG C test film below is evaluated as ◎, will be more than that -75 DEG C and -50 DEG C test films below are evaluated as zero, by the examination more than -50 DEG C
Test piece be evaluated as ×.Here, RTNDTAccording to " power generation nuclear facilities specifications design builds the 4th chapter attachment 4-1 of specification " export.It will
As a result it is shown in Table 4.
Table 4
As shown in table 4, No.1~7 for meeting the scope of the present invention are good in whole assessment items.
On the other hand, No.8~22 for being unsatisfactory for the scope of the present invention are result below.
The C content of No.8 is low, and therefore the tensile strength characteristic of " PWHT (615 DEG C × 10h) is afterwards " is poor.The C content of No.9 is high,
Therefore the characteristic of dropping hammer of the toughness " in the state of after welding ", characteristic of dropping hammer and " PWHT (615 DEG C × 10h) is afterwards " is poor.
The Si contents of No.10 are low, the toughness of " in the state of after welding ", characteristic of dropping hammer, " PWHT (615 DEG C × 10h) is afterwards "
Tensile strength characteristic it is poor.The Si contents of No.11 are high, and therefore the toughness " in the state of after welding ", characteristic of dropping hammer are poor.
The Mn contents of No.12 are low, and therefore the toughness " in the state of after welding ", characteristic of dropping hammer are poor.The Mn contents of No.13
Height, therefore the toughness " in the state of after welding ", characteristic of dropping hammer are poor.
The P content of No.14 is high, therefore the toughness " in the state of after welding ", characteristic of dropping hammer, " PWHT (615 DEG C × 10h)
Characteristic of dropping hammer afterwards " is poor.The S contents of No.15 are high, therefore the toughness " in the state of after welding ", characteristic of dropping hammer, " PWHT (615
DEG C × 10h) afterwards " characteristic of dropping hammer it is poor.The Cu contents of No.16 are high, therefore the toughness " in the state of after welding ", characteristic of dropping hammer,
The characteristic of dropping hammer of " PWHT (615 DEG C × 10h) is afterwards " is poor.
The Ni contents of No.17 are low, and therefore the toughness " in the state of after welding ", characteristic of dropping hammer are poor.The Ni contents of No.18
Height, therefore the toughness " in the state of after welding ", characteristic of dropping hammer, the characteristic of dropping hammer of " PWHT (615 DEG C × 10h) is afterwards " are poor.
The Mo contents of No.19 are low, and therefore the tensile strength characteristic of " PWHT (615 DEG C × 10h) is afterwards " is poor.The Mo of No.20 contains
Amount is high, and therefore the toughness " in the state of after welding ", characteristic of dropping hammer, the characteristic of dropping hammer of " PWHT (615 DEG C × 10h) is afterwards " are poor.
The Ti contents of No.21 are low, therefore the toughness " in the state of after welding ", characteristic of dropping hammer, " PWHT (615 DEG C × 10h)
Tensile strength characteristic afterwards " is poor.The Ti contents of No.22 are high, therefore the toughness " in the state of after welding ", characteristic of dropping hammer, " PWHT
(615 DEG C × 10h) afterwards " toughness, characteristic of dropping hammer it is poor.
Next, the GMAW welding wires of chemical composition shown in embodiment 7 using table 1, item is welded according to shown in table 5
Part carries out soldering test under various welding postures and weld heat input, evaluates the engineering properties of deposited metal.In advance
Temperature is set as 200~220 DEG C between heat, road, and protective gas is set as Ar-10%CO2(25L/min), distance is set as between tip, base material
15~20mm.In addition, the bonding machine of this item embodiment is also using the bonding machine for being accompanied with pulse welding function, impulsive condition root
According to table 3.
Table 5
In the embodiment of this item, assessment item and test film acquisition method etc. are identical as embodiment above-mentioned.For deposition
For the tensile strength characteristic of metal totality, the test film that TS is 587MPa or more is evaluated as zero, by the examination less than 587MPa
Test piece be evaluated as ×.In addition, for toughness, 3 average out to of the impact value (hereinafter, being denoted as vE-39 DEG C) when by -39 DEG C
The test film of 100J or more is evaluated as ◎, 55J is evaluated as zero less than the test film of 100J, by the experiment less than 55J
Piece is evaluated as ×.In addition, for characteristic of dropping hammer, by RTNDTIt is evaluated as ◎ for -75 DEG C of test films below, will be more than -75
DEG C and -50 DEG C of test films below be evaluated as zero, the test film more than -50 DEG C is evaluated as ×.It shows the result in table 6.
Table 6
As shown in table 6, No.23~26 for meeting the scope of the present invention are good in whole assessment items.
More than, to showing that embodiments and examples are described in detail about the present invention, purport of the invention is simultaneously
It is not limited to above-mentioned content, interest field must be based on the record of technical solution and extensive interpretation.It should be noted that this
The content of invention carries out extensive modifications, change etc. it is of course possible to be based on the record.
Claims (2)
1. a kind of gas metal arc welding of the deposited metal formed for being heat-treated after being welded is welded with medicine core
Silk, which is characterized in that contain C：0.010~0.100 mass %, Si：0.20~1.00 mass %, Mn：1.20~2.00 matter
Measure %, P：0.025 mass % or less, S：0.003~0.025 mass %, Cu：0.01~0.35 mass %, Ni：4.00~5.00
Quality %, Mo：0.10~0.50 mass %, Ti：0.025~0.075 mass %, surplus is by Fe and inevitable impurity structure
At.
2. a kind of gas metal arc welding of the deposited metal formed for being heat-treated after being welded is welded with medicine core
Silk, which is characterized in that contain C：0.010~0.050 mass %, Si：0.20~0.50 mass %, Mn：1.20~1.40 matter
Measure %, P：0.010 mass % or less, S：0.003~0.010 mass %, Cu：0.01~0.35 mass %, Ni：4.00~4.50
Quality %, Mo：0.10~0.30 mass %, Ti：0.050~0.075 mass %, surplus is by Fe and inevitable impurity structure
At.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014046502A JP6255284B2 (en) | 2014-03-10 | 2014-03-10 | Solid wire for gas metal arc welding |
| JP2014-046502 | 2014-03-10 |
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| CN104907726A CN104907726A (en) | 2015-09-16 |
| CN104907726B true CN104907726B (en) | 2018-11-09 |
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| CN201410776598.3A Expired - Fee Related CN104907726B (en) | 2014-03-10 | 2014-12-15 | Gas metal arc welding flux-cored wire |
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| JP (1) | JP6255284B2 (en) |
| KR (1) | KR101688310B1 (en) |
| CN (1) | CN104907726B (en) |
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| CN106736031A (en) * | 2016-12-26 | 2017-05-31 | 首钢总公司 | A kind of steel welding rod |
| CN107414342A (en) * | 2017-07-31 | 2017-12-01 | 安徽华众焊业有限公司 | A kind of copper aluminium flux-cored wire |
| CN110625289A (en) * | 2019-08-07 | 2019-12-31 | 中国第一重型机械集团大连加氢反应器制造有限公司 | Tungsten electrode argon arc welding wire for welding Mn-Mo-Ni steel of nuclear island main equipment |
| CN113547255B (en) * | 2021-07-20 | 2022-09-06 | 武汉铁锚焊接材料股份有限公司 | Flux-cored wire for ultralow-temperature high manganese steel suitable for all-position welding and application thereof |
| CN114700385B (en) * | 2022-04-20 | 2023-08-22 | 山东钢锢诚焊材股份有限公司 | Processing technology and device for special protective welding wire for repair welding |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63157795A (en) * | 1986-12-19 | 1988-06-30 | Nippon Steel Corp | Wire for high tensile steel |
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| JPS5440250A (en) * | 1977-09-05 | 1979-03-29 | Nippon Steel Corp | Wire for gas shielded arc welding of high efficiency |
| JPS5886996A (en) * | 1981-11-18 | 1983-05-24 | Mitsubishi Heavy Ind Ltd | Welding material of high strength and high toughness |
| JPS60196286A (en) * | 1984-03-17 | 1985-10-04 | Nippon Steel Corp | Steel wire for gas shielded arc welding for 80-kg/cm2 class high tensile steel |
| AU4111193A (en) * | 1992-05-27 | 1993-12-30 | Alloy Rods Global, Inc. | Welding electrodes for producing low carbon bainitic ferrite weld deposits |
| JPH07195193A (en) * | 1993-12-29 | 1995-08-01 | Kobe Steel Ltd | Solid wire for thin sheet of high tension steel |
| US5744782A (en) * | 1996-03-07 | 1998-04-28 | Concurrent Technologies Corporation | Advanced consumable electrodes for gas metal arc (GMA) welding of high strength low alloy (HSLA) steels |
| JP2000225465A (en) * | 1999-02-02 | 2000-08-15 | Nippon Steel Weld Prod & Eng Co Ltd | Gas shield pulse arc welding method |
| JP3894703B2 (en) | 1999-04-15 | 2007-03-22 | Ｊｆｅスチール株式会社 | Gas shielded arc welding wire |
| JP2003311471A (en) | 2002-04-19 | 2003-11-05 | Nippon Steel Corp | SOLID WIRE FOR GAS-SHIELDED ARC WELDING OF HIGH Ni BASED WEATHER RESISTANT STEEL |
| JP2005211933A (en) * | 2004-01-29 | 2005-08-11 | Jfe Steel Kk | Carbon dioxide gas shield arc welding method and weld joint |
| CN1274459C (en) * | 2004-05-10 | 2006-09-13 | 安泰科技股份有限公司 | High strength welding rod with excellent low-temperature toughness |
| CN100484687C (en) * | 2005-09-30 | 2009-05-06 | 中国船舶重工集团公司第七二五研究所 | High-strength and high-toughness gas protective welding wire containing copper |
| JP5019781B2 (en) | 2006-04-27 | 2012-09-05 | 株式会社神戸製鋼所 | MIG arc welding method using gas shielded arc welding flux cored wire |
| JP5457920B2 (en) * | 2010-04-09 | 2014-04-02 | 株式会社神戸製鋼所 | Weld metal with excellent low temperature toughness and drop characteristics |
| CN102500953A (en) * | 2011-12-14 | 2012-06-20 | 上海交通大学 | High-strength low-yield-ratio gas shielded welding wire |
-
2014
- 2014-03-10 JP JP2014046502A patent/JP6255284B2/en not_active Expired - Fee Related
- 2014-12-15 CN CN201410776598.3A patent/CN104907726B/en not_active Expired - Fee Related
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63157795A (en) * | 1986-12-19 | 1988-06-30 | Nippon Steel Corp | Wire for high tensile steel |
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| CN104907726A (en) | 2015-09-16 |
| JP2015167995A (en) | 2015-09-28 |
| KR20150105925A (en) | 2015-09-18 |
| KR101688310B1 (en) | 2016-12-20 |
| JP6255284B2 (en) | 2017-12-27 |
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