CN109158796A - A kind of mating flux-cored wire of bridge steel Q690qE - Google Patents
A kind of mating flux-cored wire of bridge steel Q690qE Download PDFInfo
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- CN109158796A CN109158796A CN201811240446.6A CN201811240446A CN109158796A CN 109158796 A CN109158796 A CN 109158796A CN 201811240446 A CN201811240446 A CN 201811240446A CN 109158796 A CN109158796 A CN 109158796A
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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
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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
- B23K35/3053—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
- B23K35/40—Making wire or rods for soldering or welding
-
- 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
- B23K35/40—Making wire or rods for soldering or welding
- B23K35/406—Filled tubular wire or rods
Abstract
The invention belongs to technical field of welding materials, in particular to a kind of mating flux-cored wire of bridge steel Q690qE and preparation method thereof.Flux-cored wire is made of low-carbon cold rolling steel band package medicine core powder, and medicine core powder accounts for the 20% ~ 35% of welding wire gross mass.Drug core component and dosage are by mass percentage are as follows: FNiN-50 nano-nickel powder 3.0% ~ 5.5%, nano silicon nitride chromium powder 0.5% ~ 1.2%, nano-graphene 0.2% ~ 0.4%, nano-cerium oxide 0.2% ~ 0.8%, FeMn84C0.05 micro-carbon ferromanganese 1.2% ~ 2.0%, AlSi50 aluminium intermediate alloy 1.0% ~ 2.0%, Nb powder 0.25% ~ 0.45%, Mo powder 2.5% ~ 4.5%, Cu powder 0.4% ~ 1.0%, zirconium hafnium alloy powder (the two mass ratio is 96: 4) 0.5% ~ 1.0%, KBF42.5% ~ 3.5%, surplus is FHT10025 reduced iron powder.
Description
Technical field
The present invention relates to field of welding material, more particularly to a kind of mating flux-cored wire of bridge steel Q690qE.
Technical background
The major requirement of bridge steel are as follows: 1. higher low-temperature impact toughness；2. stronger atmospheric corrosion resistance；3. higher
Tensile strength；4. lesser yield tensile ratio, yield tensile ratio is smaller, and the potential ability of structure collapse resistance is stronger, once overload, it also can be by
Found early in plastic deformation and catastrophic collapse will not occur, if but yield tensile ratio it is too small, the effective rate of utilization of material is just
It is low；
The bridge steel in China experienced a veryer long development process, and the surrender for building the used steel plate of bridge of completion is strong
Degree gradually develops to 420MPa rank and 500MPa to 370MPa rank again from 235MPa to 345MPa.It puts into operation within 2015
The yield strength rank that the logical bridge in Shanghai uses is the new generation of bridge steel Q500qE of 500MPa.With science and technology progress and
The needs of economic development, 550MPa grades, 620MPa grades, 690MPa grades of bridge steel will also put into implementation, especially Q690qE
Bridge steel, it be build of new generation high intensity, high tenacity, high antifatigue bridge high request steel grade, not only require one
The load and impact flexibility of fixed intensity and receiving rolling stock, also require yield tensile ratio the smaller the better in a certain range, low
Warm impact flexibility also has higher requirement, and atmospheric corrosion resistance will be got well.
GB/T 714-2015 " structural steel for bridge " is instead of GB/T 714-2008, wherein most important change is pair
Low-temperature impact absorbs energy (KV2) value significantly adjusted, KV when will be -40 DEG C original2Value is increased to by 47J
120J, and increase in Appendix B recommendation yield tensile ratio (Q345q, Q370q, Q420q no more than 0.85, Q460q ~
Q690q agreement can refer to 0.85 execution), it proposes in appendix C and is referred to using the corrosion resistance of the chemical component prediction steel of steel
The calculation formula of number I has preferable atmospheric corrosion resistance index value I should be not less than 6.0 by ASTM relevant criterion steel.
There is presently no the mating flux-cored wires of Q690qE bridge steel welding, and researching and developing this new varieties welding wire is section skilled worker
The task of top priority of author.
Summary of the invention
A kind of mating medicine of bridge steel Q690qE that the object of the invention is to provide to solve the deficiency of the prior art
Core welding wire, deposited metal composition, deposited metal mechanical property and the deposited metal corrosion resistance of the flux-cored wire can be with
Meet the welding requirements of bridge steel Q690qE.
To achieve the above object, the present invention adopts the following technical scheme: a kind of mating flux-cored wire of bridge steel Q690qE, packet
Crust and medicine core are included, the drug core component and dosage are as mass fraction are as follows: FNiN-50 nano-nickel powder 3.0% ~ 5.5%, nanometer nitrogen
Change chromium powder 0.5% ~ 1.2%, nano-graphene 0.2% ~ 0.4%, nano-cerium oxide 0.2% ~ 0.8%, FeMn84C0.05 micro-carbon ferromanganese
1.2% ~ 2.0%, AlSi50 aluminium intermediate alloy 1.0% ~ 2.0%, Nb powder 0.25% ~ 0.45%, Mo powder 2.5% ~ 4.5%, Cu powder 0.4% ~
1.0%, zirconium hafnium alloy powder (the two mass ratio is 96: 4) 0.5% ~ 1.0%, KBF42.5% ~ 3.5%, surplus be FHT10025 also
Former iron powder, the partial size of the nano silicon nitride chromium powder are 50 ~ 120nm, and the partial size of the nano-graphene is 30 ~ 80nm, described to receive
The partial size of rice cerium oxide is 40 ~ 100nm.
The medicine core quality accounts for the 20% ~ 35% of flux-cored wire gross mass (i.e. filling rate).
Preferably, the 80 mesh percent of pass of medicine core powder is 100%.
Preferably, purity >=99.6% of the nanometer chrome nitride, purity >=99.5% of the nano-graphene are described to receive
Purity >=99.9% of purity >=99.0%, Nb of rice cerium oxide, purity >=99.6% of purity >=99.9%, Cu of the Mo, institute
State purity >=99.0% of zirconium hafnium alloy powder, the KBF4Purity >=99.5%.
The gage of wire is 1.2 ~ 4.0mm.
The crust be width be 8 ~ 20mm, the low-carbon cold rolling steel band with a thickness of 0.25 ~ 1.8mm, the chemical component of steel band
In mass percent are as follows: C 0 ~ 0.003%, Mn 0.2% ~ 0.35%, Si 0 ~ 0.028%, S 0 ~ 0.001%, P 0 ~ 0.001%,
Surplus is Fe；The tensile strength of steel band is 260 ~ 380MPa, and elongation is not less than 42%.
A kind of mating flux-cored wire of bridge steel Q690qE, preparation step are as follows:
(1) sorting: the raw material of above-mentioned chemical component is selected to carry out quality purity control；
(2) medicinal powder is handled: medicinal powder is put into open quartz container, is subsequently placed in drying box and dries, 160 DEG C of drying temperature
± 5 DEG C, 1.5 ~ 2h of drying time；
(3) it sieves powder: using 80 mesh screens to be sieved respectively in the powder after drying, save fine powder after sieving, discard impurity；
(4) match powder and mixed powder: the medicinal powder after weighing sieving in proportion is added in mixed powder machine, mixing is stirred, after being stirred
At mixed powder；
(5) steel band rolling and medicinal powder encapsulation: by low-carbon cold rolling steel band be placed on flux-cored wire forming machine put band machine on, pass through into
U-type groove is made in low-carbon cold rolling steel band by type machine, the mixed powder that step (4) obtain then is added into U-type groove, then pass through molding
U-type groove is rolled closure and forms O type by machine, makes medicinal powder package wherein, through wire drawing machine by road drawing, tube reducing, it is drawn to 1.2 ~
4.0mm obtains flux-cored wire, and disk is at disk, sealed package.
The design principle of each chemical element in the mating flux-cored wire of bridge steel Q620qF of the present invention are as follows:
Ni: deriving from FNiN-50 nano-nickel powder, and the intensity and impact flexibility of deposited metal can be improved in Ni, especially improves molten
The low-temperature impact toughness of metallisation, and brittle transition temperature is reduced, and Ni has fabulous atmospheric corrosion resistance ability.
Cr: deriving from chromium nitride, and under the action of electric arc heat input, a part of chromium nitride is decomposed into Cr element and N element,
Wherein the corrosion resistance of deposited metal can be improved in Cr, in addition it can fining ferrite grains, increases the tough of metal secondary structure
Property.
N: next former in deriving from chromium nitride, under arc heat input action, a part of chromium nitride is decomposed, and is decomposited
The volatilization of N element a part, a part are solid-solution in iron, are formed clearance-type solid solution, are there is the low-temperature impact toughness of deposited metal
It is significant to improve.
C: graphene is derived from, influence of the alloying element to mechanical property depends not only on carbon and alloying element is formed and is carbonized
Type, size, shape, quantity and the distribution of object, and depend on the size of crystal grain and being evenly distributed for alloying element
Degree.To obtain carbon in weld seam, a certain amount of graphene is added in flux-cored wire, can promote being uniformly distributed for C element.
Cerium oxide: cerium oxide has the function of refining crystal grain, and can promote the uniform of alloying element in deposited metal
Distribution.
Nano nickel, the nanometer chrome nitride for not having enough time decomposing then are used as nucleation mass point, play the role of non-spontaneous forming core,
The crystal grain that deposited metal can be refined, promotes alloying elements distribution to homogenize.
Additionally, due to nano nickel, nanometer chrome nitride, nano-graphene, nano-cerium oxide nano-scale structure be easy to
Other atoms combine, therefore the non-uniform field trash of size will not be generated in deposited metal, and surface atom has pole
High chemical activity, it is very unstable, it is easy in conjunction with other atoms, a large amount of interface provides highdensity short for atom diffusion
Journey fast diffusion path, this makes it be easier to spread in metal bath, can effectively improve the comprehensive mechanical property of deposited metal
Especially greatly improve low-temperature impact toughness.
Mn:Mn is the beneficial element for increasing weld metal strength and toughness, and the increase of manganese content not only contributes to prevent weld seam golden
There is fire check in category, also helps the deoxidation of weld metal.If manganese content is excessively high be easy for causing deposited metal occur segregation and
Crackle is also easy to keep the carbon equivalent of deposited metal excessive, there is the risk for the toughness for reducing weld metal.
Al:Al derives from AlSi50 aluminium intermediate alloy, and Al has both desulfurization and the effect of dephosphorization, aluminium is not as strong deoxidier
But it can reduce deposited metal to the sensibility of notch, reduce or eliminate the aging phenomenon of deposited metal, reduce ductile-brittle transition temperature,
And aluminium also reduces deposited metal notch sensitivity.Improve the low-temperature impact toughness of deposited metal.
Si:Si derives from AlSi50 aluminium intermediate alloy, and for Si other than with good deoxidation, Si is also solid-solubilized in iron element
In body and austenite, the intensity of weld metal can be improved.Meanwhile the silicon for adding certain content can also increase weld metal
Mobility, making welding wire in the welding process has good welding technological properties.
Nb:Nb has good corrosion resistance, has good stabilization to β phase, and reduce the content of the impurity elements such as carbon oxygen,
The corrosion resistance of deposited metal is significantly improved, and Nb can also improve the impact flexibility of deposited metal to a certain extent.
Mo:Mo can form MoC and Mo with C2C, both particles are uniformly distributed in tissue, as foreign nucleus when crystallization
The heart controls the movement that the crystal grain in crystallization process is grown up with carbide crystal boundary, so that thinning microstructure, improves the intensity of deposited metal
And impact flexibility.
Cu: corrosion resistance, enhancing weather-resistant performance are improved；And when the mass fraction of Cu is less than 0.50%, effect master
Show as solution strengthening.
B:B derives from KBF4, B can be solid-solution in austenite grain boundary, enhance grain boundary effect, inhibit the shape of pro-eutectoid ferrite
Core with grow up, avoid crystal boundary formed ferrite, reduce the ductile-brittle transition temperature of deposited metal, the low of deposited metal can be effectively improved
Warm impact flexibility.
F:F derives from KBF4, the fluorine ion generated in welding process reacts with hydrogen, can reduce the residual hydrogen of deposited metal
Content, and then improve its low-temperature impact toughness.
Zr and Hf: former in zirconium hafnium alloy powder, Zr and Hf are obdurability elements, are especially rushed to the low temperature for improving deposited metal
Hitting toughness has remarkable effect.
The beneficial effects of the present invention are:
1) the mating flux-cored wire of bridge steel Q690qE provided by the invention, the group based on Ni, Cr, Mn, Nb, Al, Mo, Cu, Zr, Hf
Point, it is equipped with graphene, B, N, then be aided with other components, by reasonably selecting each component and regulating and controlling each component content, makes each component
Between generate collaboration facilitation, effectively improve the low-temperature impact toughness and atmospheric corrosion resistance of welding wire.
2) the mating flux-cored wire of bridge steel Q690qE provided by the invention, by adding Ni, CrN, CeO nano-scale
Grain provides highdensity short distance fast diffusion path for atom diffusion, makes it be easier to spread in metal bath, avoid ruler
The generation of the very little non-uniform field trash of size.
3) the mating flux-cored wire of bridge steel Q690qE provided by the invention, by adding nano-graphene, to a certain degree
While upper raising C content, low-temperature impact toughness ensure that while improving intensity using its equally distributed characteristic.
4) atmospheric corrosion resistance is improved while refining crystal grain enhancing impact flexibility by the content of limitation Cr, Cu
Energy.
By on bridge steel 690qE welding show: the welding technological properties of welding wire is excellent, weld seam take off slag be easy, molding
Beauty, deposited metal composition, deposited metal mechanical property deposited metal corrosion resistance are all satisfied 690MPa grades of bridge steels
Welding requirements, yield tensile ratio≤0.80, KV at -40 DEG C2Minimum value be 146J, KV at -60 DEG C2Minimum value be 79J, it is resistance to
Atmospheric corrosiveness index value I >=6.349.
Specific embodiment
The principle of the invention and feature are described with reference to embodiments, listed give an actual example is served only for explaining the present invention,
And the non-limiting scope of the invention.
Embodiment 1:
A kind of mating flux-cored wire of bridge steel Q690qE, the flux-cored wire are made of low-carbon cold rolling steel band package medicine core powder.
Carrying out following processes first: sorting, → medicinal powder is handled → sieves powder → with powder and mixed powder；Then selecting width is 16mm,
With a thickness of the low-carbon cold rolling steel band of 0.6mm, it is pressed by molding machine U-shaped；Mixed medicine core powder is filled into U-type groove again,
Medicine core silty amount accounts for the 25% of flux-cored wire quality；Again U-type groove opening is healed up to form O type, thus make medicine core package wherein,
Through wire drawing machine by road drawing, tube reducing, the welding wire of Ф 3.2mm, i.e., the mating flux-cored wire of bridge steel Q690E of the invention are obtained.
The drug core component and dosage are by mass percentage are as follows: FNiN-50 nano-nickel powder 3.0% ~ 5.5%, nano silicon nitride
Chromium powder 0.5% ~ 1.2%, nano-graphene 0.2% ~ 0.4%, nano-cerium oxide 0.2%, FeMn84C0.05 micro-carbon ferromanganese 1.2%,
AlSi50 aluminium intermediate alloy 1.0%, Nb powder 0.25%, Mo powder 2.5%, Cu powder 0.4%, zirconium hafnium alloy powder (the two mass ratio is 96: 4)
0.5%, KBF42.5%, surplus is FHT10025 reduced iron powder.
Embodiment 2:
A kind of mating flux-cored wire of bridge steel Q690qE, the flux-cored wire are made of low-carbon cold rolling steel band package medicine core powder.
Carrying out following processes first: sorting, → medicinal powder is handled → sieves powder → with powder and mixed powder；Then selecting width is 16mm,
With a thickness of the low-carbon cold rolling steel band of 0.6mm, it is pressed by molding machine U-shaped；Mixed medicine core powder is filled into U-type groove again,
Medicine core silty amount accounts for the 25% of flux-cored wire quality；Again U-type groove opening is healed up to form O type, so that medicine core be made to wrap up it
In, through wire drawing machine by road drawing, tube reducing, obtain the welding wire of Ф 2.8mm, i.e., the mating medicine core weldering of bridge steel Q620qF of the invention
Silk.
The drug core component and dosage are by mass percentage are as follows: FNiN-50 nano-nickel powder 4.0%, nano silicon nitride chromium powder
0.7%, nano-graphene 0.25%, nano-cerium oxide 0.3%, FeMn84C0.05 micro-carbon ferromanganese 1.4%, AlSi50 aluminium intermediate alloy
1.2%, Nb powder 0.30%, Mo powder 3.0%, Cu powder 0.5%, zirconium hafnium alloy powder (the two mass ratio is 96: 4) 0.7%, KBF42.8%,
Surplus is FHT10025 reduced iron powder.
Embodiment 3:
A kind of mating flux-cored wire of bridge steel Q690qE, the flux-cored wire are made of low-carbon cold rolling steel band package medicine core powder.
Carrying out following processes first: sorting, → medicinal powder is handled → sieves powder → with powder and mixed powder；Then selecting width is 16mm,
With a thickness of the low-carbon cold rolling steel band of 0.6mm, it is pressed by molding machine U-shaped；Mixed medicine core powder is filled into U-type groove again,
Medicine core silty amount accounts for the 25% of flux-cored wire quality；U-type groove opening is healed up again, and it is O-shaped to be formed, thus make medicine core package wherein,
Through wire drawing machine by road drawing, tube reducing, the welding wire of Ф 2.0mm, i.e., the mating flux-cored wire of bridge steel Q620qF of the invention are obtained.
The drug core component and dosage are by mass percentage are as follows: FNiN-50 nano-nickel powder 4.5%, nano silicon nitride chromium powder
0.9%, nano-graphene 0.35%, nano-cerium oxide 0.6%, FeMn84C0.05 micro-carbon ferromanganese 1.6%, AlSi50 aluminium intermediate alloy
1.5%, Nb powder 0.35%, Mo powder 3.5%, Cu powder 0.8%, zirconium hafnium alloy powder (the two mass ratio is 96: 4) 0.85%, KBF43.0%,
Surplus is FHT10025 reduced iron powder.
Embodiment 4:
A kind of mating flux-cored wire of bridge steel Q690qE, the flux-cored wire are made of low-carbon cold rolling steel band package medicine core powder.
Carrying out following processes first: sorting, → medicinal powder is handled → sieves powder → with powder and mixed powder；Then selecting width is 16mm,
With a thickness of the low-carbon cold rolling steel band of 0.6mm, it is pressed by molding machine U-shaped；Mixed medicine core powder is filled into U-type groove again,
Medicine core silty amount accounts for the 25% of flux-cored wire quality；Again U-type groove opening is healed up to form O type, thus make medicine core package wherein,
Through wire drawing machine by road drawing, tube reducing, the welding wire of Ф 1.6mm, i.e., the mating flux-cored wire of bridge steel Q690E of the invention are obtained.
The drug core component and dosage are by mass percentage are as follows: the drug core component and dosage are as mass fraction are as follows:
FNiN-50 nano-nickel powder 5.0%, nano silicon nitride chromium powder 1.0%, nano-graphene 0.35%, nano-cerium oxide 0.7%,
FeMn84C0.05 micro-carbon ferromanganese 1.8%, AlSi50 aluminium intermediate alloy 1.8%, Nb powder 0.40%, Mo powder 4.0%, Cu powder 0.8%, zirconium hafnium
Alloyed powder (the two mass ratio is 96: 4) 0.8%, KBF43.2%, surplus is FHT10025 reduced iron powder.
Embodiment 5:
A kind of mating flux-cored wire of bridge steel Q690qE, the flux-cored wire are made of low-carbon cold rolling steel band package medicine core powder.
Carrying out following processes first: sorting, → medicinal powder is handled → sieves powder → with powder and mixed powder；Then selecting width is 16mm,
With a thickness of the low-carbon cold rolling steel band of 0.6mm, it is pressed by molding machine U-shaped；Mixed medicine core powder is filled into U-type groove again,
Medicine core silty amount accounts for the 25% of flux-cored wire quality；U-type groove opening is healed up again, and it is O-shaped to be formed, thus make medicine core package wherein,
Through wire drawing machine by road drawing, tube reducing, the welding wire of Ф 1.2mm, i.e., the mating flux-cored wire of bridge steel Q690E of the invention are obtained.
The drug core component and dosage are calculated as by quality percentage: FNiN-50 nano-nickel powder 5.5%, nano silicon nitride chromium powder
1.2%, nano-graphene 0.4%, nano-cerium oxide 0.8%, FeMn84C0.05 micro-carbon ferromanganese 2.0%, AlSi50 aluminium intermediate alloy
2.0%, Nb powder 0.45%, Mo powder 4.5%, Cu powder 1.0%, zirconium hafnium alloy powder (the two mass ratio is 96: 4) 0.5% ~ 1.0%, KBF4
3.5%, surplus is FHT10025 reduced iron powder.
Comparative example 1:
In addition to without " FNiN-50 nano-nickel powder, nanometer chrome nitride ", other are complete for this comparative example and 5 drug core component of embodiment and dosage
Exactly the same, the preparation process of this comparative example is identical with embodiment 5.
Comparative example 2:
This comparative example and 5 drug core component of embodiment and dosage are in addition to without " nano-graphene, nano-cerium oxide ", other complete phases
Together, the preparation process of this comparative example is identical with embodiment 5.
Comparative example 3:
This comparative example and 5 drug core component of embodiment and dosage are removed without " FeMn84C0.05 micro-carbon ferromanganese, AlSi50 aluminium intermediate alloy "
Outside, other are identical, and the preparation process of this comparative example is identical with embodiment 5.
Comparative example 4:
This comparative example and 5 drug core component of embodiment and dosage are removed " FNiN-50 nano-nickel powder, nano silicon nitride chromium powder, nano-graphite
Alkene, nano-cerium oxide " is changed to " nickel powder, nitridation chromium powder, graphene, cerium oxide " outside, and other components and dosage are identical, this is right
The preparation process of ratio is identical with embodiment 5.
Welding wire welding on bridge steel Q690qE that embodiment 1,2,3,4,5 and comparative example 1,2,3,4 are obtained uses
CO2Gas shield, CO2Gas purity is greater than 99.5%, H2O is less than 0.2%.Welding current be 180 ~ 260A, weldingvoltage be 22 ~
28V, speed of welding are 18 ~ 20mm/s, gas flow 25L/min.By 25776-2010 " welding material welding procedure of GB/T
Reliable Evaluating Methods of Their Performance " processing performance evaluation is carried out, deposited metal composition analysis is carried out by GB/T223 series standard, by GB/
T 2652-2008 " weld seam and deposited metal stretching test method " and " the welding point impact test side GB/T 2650-2008
Method " Mechanics Performance Testing is carried out, and yield tensile ratio and atmospheric corrosion resistance index value I are calculated, wherein I is calculated as follows:
I=26.01 (%Cu)+3.88 (%Ni)+1.20 (%Cr)+1.49 (%Si)+17.28 (%P) -7.29 (%Cu) (%
Ni) -9.10 (%Ni) (%P) -33.39 (%Cu)2
Deposited metal composition is as shown in table 1.
The deposited metal mechanical property and corrosion resistance of flux-cored wire are as shown in table 2.
Above embodiments and comparative example show: when 1. each component and dosage are in claimed range in the present invention, the conjunction of element
Reason design meets the atmospheric corrosion resistance requirement of weld(ing) deposit, and lower yield strength, tensile strength, yield tensile ratio, low-temperature impact are inhaled
Energy value is received to meet the requirements；2. be not added with " FNiN-50 nano-nickel powder, nanometer chrome nitride " in the present invention, or it is not added with and " receives
When rice graphene, nano-cerium oxide ", or when being not added with " FeMn84C0.05 micro-carbon ferromanganese, AlSi50 aluminium intermediate alloy ", or will
" FNiN-50 nano-nickel powder, nano silicon nitride chromium powder, nano-graphene, nano-cerium oxide " is changed to " nickel powder, nitridation chromium powder, graphite
When alkene, cerium oxide ", the rational design of other elements can meet weldering (without two kinds of elements of Ni and Cr in the example) in addition to comparative example 1
The atmospheric corrosion resistance requirement of deposited metal is stitched, so that atmospheric corrosion resistance improves significantly, still, lower yield strength, tension are strong
Degree, yield tensile ratio are undesirable, and low-temperature impact absorbs energy value and is then significantly less than required value.
It should be pointed out that core of innovation of the invention is to give the constituent ingredient of medicine core and dosage, pass through conjunction
Reason selection each component simultaneously regulates and controls each component content, makes to generate collaboration facilitation between each component, effectively improves the low temperature of welding wire
Impact flexibility and atmospheric corrosion resistance.Especially be added in medicine core powder FNiN-50 nano-nickel powder, nano silicon nitride chromium powder,
Nano-graphene, nano-cerium oxide, and optimize each component zone of reasonableness, being realized by the complex intensifying of multiple element ensures to make
Under the premise of intensity, reduces yield tensile ratio, effectively improves low-temperature impact toughness, enhancing atmospheric corrosion resistance.Nano-scale
The addition of grain provides highdensity short distance fast diffusion path for atom diffusion, makes it be easier to spread in metal bath, keep away
The generation for having exempted from the non-uniform field trash of size has purified the chemical component of deposited metal, improves the strong of deposited metal
Degree and low temperature temperature impact flexibility.Especially, it should be noted that the addition of not one of substance plays key effect, form
The ingredient of object and the comprehensive function of dosage are only core of the invention creation.
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.All
According to equivalent change or modification made by spirit of the invention, should be covered by the protection scope of the present invention.
Claims (5)
1. a kind of mating flux-cored wire of bridge steel Q690qE, including crust and medicine core, the drug core component and dosage press quality hundred
Ratio is divided to be calculated as: FNiN-50 nano-nickel powder 3.0% ~ 5.5%, nano silicon nitride chromium powder 0.5% ~ 1.2%, nano-graphene 0.2% ~ 0.4%,
Nano-cerium oxide 0.2% ~ 0.8%, FeMn84C0.05 micro-carbon ferromanganese 1.2% ~ 2.0%, AlSi50 aluminium intermediate alloy 1.0% ~ 2.0%, Nb
Powder 0.25% ~ 0.45%, Mo powder 2.5% ~ 4.5%, Cu powder 0.4% ~ 1.0%, zirconium hafnium alloy powder (the two mass ratio is 96: 4) 0.5% ~
1.0%, KBF42.5% ~ 3.5%, surplus is FHT10025 reduced iron powder, the partial size of the nano silicon nitride chromium powder is 50 ~
120nm, the partial size of the nano-graphene are 30 ~ 80nm, and the partial size of the nano-cerium oxide is 40 ~ 100nm.
2. the mating flux-cored wire of bridge steel Q690qE according to claim 1, which is characterized in that the medicine core quality accounts for medicine
The 20% ~ 35% of core welding wire gross mass.
3. the mating flux-cored wire of bridge steel Q690qE according to claim 1, the 80 mesh percent of pass of medicine core powder is 100%.
4. the mating flux-cored wire of bridge steel Q690qE according to claim 1, the crust is 8 ~ 20mm of width, thickness
The low-carbon cold rolling steel band of 0.25 ~ 1.8mm.
5. the mating flux-cored wire of bridge steel Q690qE described in one of -4 according to claim 1, which is characterized in that the welding wire is straight
Diameter is 1.2 ~ 4.0mm.
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| CN112453758A (en) * | 2020-10-29 | 2021-03-09 | 西安理工大学 | Welding wire for graphene-enhanced TA1-Q345 middle layer and preparation method |
| CN113523646A (en) * | 2021-07-29 | 2021-10-22 | 合肥工业大学 | Low-dilution-rate surfacing flux-cored wire and preparation method thereof |
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