CN109175774A - A kind of mating flux-cored wire of bridge steel Q550qE - Google Patents
A kind of mating flux-cored wire of bridge steel Q550qE Download PDFInfo
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- CN109175774A CN109175774A CN201811238755.XA CN201811238755A CN109175774A CN 109175774 A CN109175774 A CN 109175774A CN 201811238755 A CN201811238755 A CN 201811238755A CN 109175774 A CN109175774 A CN 109175774A
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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
-
- 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
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/3073—Fe as the principal constituent with Mn as next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—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 Q550qE.The flux-cored wire is made of low-carbon cold rolling steel band package medicine core powder, and medicine core powder accounts for the 25% ~ 28% of welding wire gross mass.Drug core component and dosage are by mass percentage are as follows: nano silicon nitride titanium valve 0.8% ~ 1.8%, nano-cerium oxide 0.3% ~ 1.2%, FeAl8Ba12Ca6Si40 silico-calcium barium aluminium alloy 0.2% ~ 0.5%, Nb powder 0.2% ~ 0.35%, Cr powder 0.8% ~ 1.2%, Ni powder 2.0% ~ 3.0%, Mo powder 3.5% ~ 6.0%, Cu powder 0.5% ~ 1.0%, Mn powder 5.0% ~ 6.0%, NaF powder 1.8% ~ 3.0%, surplus are 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 Q550qE.
Technical background
Flux-cored wire is a kind of new welding material, can be very square by adjusting the alloying component type and ratio of medicinal powder
Just the welding material of various different purposes is designed.Flux-cored wire is widely used, and weld metal is high-quality, the adaptation to base material
Property it is strong, welding production efficiency is high.
The matching of welding material and base material, intensity, toughness, chemical component are extremely important for welding effect.
Bridge steel plate also requires have certain yield tensile ratio in addition to there is high tensile strength；Yield tensile ratio is smaller, and structure is anti-broken
Bad potential ability is stronger, once overload, can also be found early due to plastic deformation and catastrophic collapse will not occur, if but
Yield tensile ratio is too low, then the effective rate of utilization of material is with regard to low.In addition, atmospheric corrosion resistance is also the weld(ing) deposit for measuring bridge steel
Whether He Ge important indicator.
The bridge steel plate in China experienced a veryer long development process, build the used steel plate of bridge of completion
Yield strength gradually develops to 420MPa rank and 500MPa to 370MPa rank again from 235MPa to 345MPa.It goes into operation within 2015
The yield strength rank that the logical bridge in the Shanghai of construction uses is the new generation of bridge steel Q500qE of 500MPa.
With the needs of progress and the economic development of science and technology, the bridge steel of 550MPa will also put into implementation, especially
It is Q550qNHE bridge steel, it is weather resisting steel, not only requires certain intensity and toughness, also requires yield tensile ratio
It is the smaller the better in a certain range, and corrosion resistance will be got well, but matching there is presently no Q550qNHE bridge steel welding
Cover flux-cored wire.
State Bureau of Technical Supervision has issued new standard GB/T 714-2015 " structural steel for bridge " on September 11st, 2015
(implementation on June 1st, 2016) is instead of GB/T 714-2008, wherein most important change is to absorb energy value to low-temperature impact
(KV2) significantly adjusted, KV when will be original -40 DEG C2Value is increased to 120J by 47J, and increases in Appendix B
(Q345q, Q370q, Q420q can refer to 0.85 and hold the yield tensile ratio recommended no more than 0.85, Q460q ~ Q690q agreement
Row), the calculation formula of the corrosion resistance index I using the chemical component prediction steel of steel is proposed in appendix C, according to ASTM phase
Pass standard steel have preferable atmospheric corrosion resistance index value I should be not less than 6.0.
Summary of the invention
A kind of mating medicine of bridge steel Q550qE 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 Q550qE.
To achieve the above object, the present invention adopts the following technical scheme: a kind of mating flux-cored wire of bridge steel Q550qE, packet
Crust and medicine core are included, the drug core component and dosage are by mass percentage are as follows: nano silicon nitride titanium valve 0.8% ~ 1.8%, nano oxygen
Change cerium 0.3% ~ 1.2%, FeAl8Ba12Ca6Si40 silico-calcium barium aluminium alloy 0.2% ~ 0.5%, Nb powder 0.2% ~ 0.35%, Cr powder 0.8% ~
1.2%, Ni powder 2.0% ~ 3.0%, Mo powder 3.5% ~ 6.0%, Cu powder 0.5% ~ 1.0%, Mn powder 5.0% ~ 6.0%, NaF powder 1.8% ~ 3.0%,
Surplus is iron powder.
Preferably, the partial size of the Nano titanium nitride is 20 ~ 80nm.
Preferably, the partial size of the nano-cerium oxide is 20 ~ 100nm.
The medicine core quality accounts for the 25% ~ 28% of flux-cored wire gross mass (i.e. filling rate).
Preferably, the 80 mesh percent of pass of medicine core powder is 100%.
Preferably, the chemical component of the FeAl8Ba12Ca6Si40 silico-calcium barium aluminium alloy is as mass fraction: Si >=
40.0%, Ca >=6.0%, Ba >=12.0%, Al >=8.0%, P≤0.04%, S≤0.02%, C≤0.40%, Mn≤0.40%, surplus
For Fe.
Preferably, purity >=99.5% of Nano titanium nitride, the purity of purity >=99.0%, Nb of the nano-cerium oxide >=
99.9%, purity >=99.6% of the Cr, purity >=99.9% of the Ni, the purity of purity >=99.9%, Cu of the Mo >=
99.6%, purity >=99.6% of the Mn, the purity of the NaF is >=99.5%.
The gage of wire is 1.2 ~ 3.2mm.
The crust is 8 ~ 18mm of width, the low-carbon cold rolling steel band with a thickness of 0.4 ~ 1.2mm, in the chemical component of steel band
Mass percent are as follows: C 0 ~ 0.035%, Mn 0.2% ~ 0.35%, Si 0 ~ 0.028%, S 0 ~ 0.01%, P 0 ~ 0.01%, surplus are
Fe；The tensile strength of steel band is 200 ~ 480MPa, elongation >=40%.
A kind of mating flux-cored wire of bridge steel Q550qE, 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, 180 DEG C of drying temperature
± 5 DEG C, 80 ~ 90min 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；
(4) match powder and mixed powder: the medicinal powder after weighing sieving in proportion is added in mixed powder machine, is stirred and is mixed into 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
Low-carbon cold rolling steel band is rolled into U-type groove by type machine, the mixed powder that step (4) obtain then is added into U-type groove, then pass through into
Type machine by U-type groove roll closure formed it is O-shaped, make medicinal powder package wherein, through wire drawing machine by road drawing, tube reducing, be drawn to 1.2
~ 3.2mm 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 Q550qE of the present invention are as follows:
Nano titanium nitride: 1. under the action of electric arc heat input, a part of titanium nitride is decomposed into Ti element and N element, due to Ti
Presence, make Ti and oxygen preferential reaction, on the one hand play deoxidation, on the other hand form titanyl compound and carbide conduct
The nucleation mass point of transgranular seam organization, has refined crystal grain；The N element a part volatilization decomposited, a part are solid-solution in iron, shape
At clearance-type solid solution, the impact flexibility of deposited metal is made to increase significantly；2. not having enough time the Nano titanium nitride decomposed
It is then used as nucleation mass point, the crystal grain of deposited metal is refined, increases its intensity and toughness；Nano titanium nitride surface atom number increases
More, large specific surface area, specific surface energy is high, and a large amount of interface provides highdensity short distance fast diffusion path for atom diffusion, together
When Nano titanium nitride surface atom have high chemical activity, it is easy to make with other atoms ining conjunction with its diffusion coefficient much larger than often
Gauge material, this point have apparent effect to the impact flexibility for improving deposited metal.1. and 2. from from the point of view of two o'clock, Nano titanium nitride
Addition can efficiently use Ti element and N element to improve the low-temperature impact toughness of deposited metal, undecomposed part is as forming core
Particle refines crystal grain, is easy in conjunction with other atoms additionally, due to the structure of its nano-scale, is just not easy in deposited metal
The non-uniform field trash of size is generated, is had to the raising of the comprehensive mechanical property especially low-temperature impact toughness of deposited metal
Remarkable effect.
Nano-cerium oxide: nano-cerium oxide has the function of refining crystal grain, and can promote alloy member in deposited metal
Element is uniformly distributed, and nanostructure makes surface atom have high chemical activity, it is easy to make its expansion in conjunction with other atoms
It dissipates coefficient to increase, the comprehensive mechanical property especially low-temperature impact toughness of deposited metal can be effectively improved.
FeAl8Ba12Ca6Si40 silico-calcium barium aluminium alloy: for silicon other than with good deoxidation, silicon is also solid-solubilized in iron
In ferritic 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.Calcium, barium, aluminium property are active, have extremely strong
Deoxidation, desulfurization, dephosphorizing capacity can purify the chemical component of deposited metal, and aluminium also reduces the notch sensitive of deposited metal
Property, there is remarkable effect to the low-temperature impact toughness for improving deposited metal.
Nb:Nb has good corrosion resistance, and reduces the content of the impurity elements such as carbon oxygen, significantly improves the anti-corrosion of deposited metal
Property, and Nb can also improve the impact flexibility of deposited metal to a certain extent.
The corrosion resistance of deposited metal can be improved in Cr:Cr, in addition it can fining ferrite grains, increases metal secondary structure
Obdurability, but content cannot be too high, otherwise will increase cool attenuation and reduces toughness.
The atmospheric corrosion resistance of deposited metal can be improved in Mo:Mo, can also refine crystal grain, improves the intensity and impact of weld seam
Toughness.
The intensity and impact flexibility of deposited metal can be improved in Ni:Ni, and the low-temperature impact of especially raising deposited metal is tough
Property, and brittle transition temperature is reduced, and Ni has fabulous atmospheric corrosion resistance ability.
Cu: improving corrosion resistance, enhances weather-resistant performance；And when the mass fraction of Cu is less than 0.50%, effect master
Show as solution strengthening.
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.But, it if manganese content is excessively high is easy for that deposited metal is caused to occur partially
Analysis and crackle, are also easy to keep the carbon equivalent of deposited metal excessive, there is the risk for reducing weld metal toughness.Thus, this technology side
Mass fraction in case by Mn element in medicinal powder controls below 6.0%, it is ensured that the mass percentage of Mn is not in deposited metal
Refer to that the Mn in carbon steel coating and medicinal powder dissolves in deposited metal altogether greater than 1.6%().
NaF:Na can play the role of stable electric arc, and the fluorine ion generated in welding process is reacted with hydrogen, can reduce molten
The residual hydrogen content of metallisation, and then improve its low-temperature impact toughness.
The beneficial effects of the present invention are: the Ti and N element that are 1. decomposited by the titanium nitride under arcing strengthen crystal boundary
And low-temperature impact toughness is improved, undecomposed Nano titanium nitride particle can be refined crystal grain using its nanostructure and reduce field trash
Generation, and then improve deposited metal comprehensive mechanical property；2. refining crystal grain by addition nano-cerium oxide, and promote deposition
Alloying element is uniformly distributed in metal；3. strengthening deoxidation, desulfurization and dephosphorization by addition silico-calcium barium aluminium alloy；4. passing through addition
The elements such as Nb, Ni, Cu, Mo improve the corrosion resistance of deposited metal, and Nb, Ni, Mo can effectively improve the low temperature of deposited metal
Impact flexibility；5. usually improving the intensity and toughness and cracking resistance of deposited metal by adding Mn member；6. passing through addition NaF
Achieve the purpose that stable electric arc, the H content in deposited metal is further decreased using F；7. flux-cored wire of the invention passes through
Welding shows on Q550qE: the welding technological properties of welding wire is good, the de- slag of weld seam is easy, beautiful appearance, deposited metal
It studies point, deposited metal mechanical property and deposited metal corrosion resistance can meet the welding requirements of bridge steel Q550qE, Qu Qiang
KV when than≤0.82, -40 DEG C2Value greatly improves, atmospheric corrosion resistance index value I >=6.847.
Specific embodiment
Principles and features of the present invention are described with reference to embodiments, listed give an actual example is served only for explaining this hair
It is bright, not limit the scope of the invention.
Embodiment 1:
Carrying out following processes first: sorting, → medicinal powder is handled → sieves powder → with powder and mixed powder；Then selecting width is 16mm, thickness
For 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, to make medicine core package wherein, through drawing
The drawing of the road Si Jizhu, tube reducing obtain the welding wire of Ф 3.2mm, i.e., the mating flux-cored wire of bridge steel Q550qE of the invention.
The drug core component and dosage are calculated as by mass percentage: nano silicon nitride titanium valve 1.8%, nano-cerium oxide 1.2%,
FeAl8Ba12Ca6Si40 silico-calcium barium aluminium alloy 0.5%, Nb powder 0.35%, Cr powder 1.2%, Ni powder 3.0%, Mo powder 6.0%, Cu powder
1.0%, Mn powder 6.0%, NaF powder 3.0%, surplus are iron powder.
Embodiment 2:
Carrying out following processes first: sorting, → medicinal powder is handled → sieves powder → with powder and mixed powder；Then selecting width is 16mm, thickness
For 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, to make medicine core package wherein, through drawing
The drawing of the road Si Jizhu, tube reducing obtain the welding wire of Ф 1.8mm, i.e., the mating flux-cored wire of bridge steel Q550qE of the invention.
The drug core component and dosage are calculated as by mass percentage: nano silicon nitride titanium valve 1.3%, nano-cerium oxide 0.8%,
FeAl8Ba12Ca6Si40 silico-calcium barium aluminium alloy 0.35%, Nb powder 0.28%, Cr powder 1.0%, Ni powder 2.5%, Mo powder 5%, Cu powder
0.8%, Mn powder 5.5%, NaF powder 2.5%, surplus are iron powder.
Embodiment 3:
Carrying out following processes first: sorting, → medicinal powder is handled → sieves powder → with powder and mixed powder；Then selecting width is 16mm, thickness
For 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, to make medicine core package wherein, through drawing
The drawing of the road Si Jizhu, tube reducing obtain the welding wire of Ф 1.2mm, i.e., the mating flux-cored wire of bridge steel Q550qE of the invention.
The drug core component and dosage are calculated as by mass percentage: nano silicon nitride titanium valve 0.8%%, nano-cerium oxide
0.5%, FeAl8Ba12Ca6Si40 silico-calcium barium aluminium alloy 0.2%, Nb powder 0.2%, Cr powder 0.8%, Ni powder 2.0%, Mo powder 3.5%, Cu
Powder 0.5%, Mn powder 5.0%, NaF powder 1.8%, surplus are iron powder.
Comparative example 1:
Carrying out following processes first: sorting, → medicinal powder is handled → sieves powder → with powder and mixed powder；Then selecting width is 16mm, thickness
For 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, to make medicine core package wherein, through drawing
The drawing of the road Si Jizhu, tube reducing obtain the welding wire of Ф 3.2mm.
In addition to without " nano silicon nitride titanium valve, nano-cerium oxide ", other are complete for this comparative example and 1 drug core component of embodiment and dosage
It is exactly the same.
Comparative example 2:
Carrying out following processes first: sorting, → medicinal powder is handled → sieves powder → with powder and mixed powder；Then selecting width is 16mm, thickness
For 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, to make medicine core package wherein, through drawing
The drawing of the road Si Jizhu, tube reducing obtain the welding wire of Ф 3.2mm.
This comparative example and 1 drug core component of embodiment and dosage in addition to nothing " FeAl8Ba12Ca6Si40 silico-calcium barium aluminium alloy ",
Other are identical.
Comparative example 3:
Carrying out following processes first: sorting, → medicinal powder is handled → sieves powder → with powder and mixed powder；Then selecting width is 16mm, thickness
For 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, to make medicine core package wherein, through drawing
The drawing of the road Si Jizhu, tube reducing obtain the welding wire of Ф 3.2mm.
This comparative example and 1 drug core component of embodiment and dosage remove without " nano silicon nitride titanium valve, nano-cerium oxide,
Outside, other are identical for FeAl8Ba12Ca6Si40 silico-calcium barium aluminium alloy ".
Welding wire welding on bridge steel Q550qE that embodiment 1,2,3 and comparative example 1,2,3 are obtained, welding current are
165 ~ 270A, weldingvoltage are 22 ~ 29V, and speed of welding is 19 ~ 22mm/s, gas flow 25L/min.By GB/T
25776-2010 " welding material welding technological properties assessment methods " carry out processing performance evaluation, by GB/T223 series standard into
Row deposited metal composition analysis, by GB/T 2652-2008 " weld seam and deposited metal stretching test method " and GB/T
2650-2008 " welding point impact test method " carries out Mechanics Performance Testing, and calculates yield tensile ratio and atmospheric corrosion resistance refers to
Numerical value I, 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 being 1. not added with " nano silicon nitride titanium valve, nano-cerium oxide " in the present invention, or
When being not added with " silico-calcium barium aluminium alloy ", or it is not added with " nano silicon nitride titanium valve, nano-cerium oxide, FeAl8Ba12Ca6Si40 silico-calcium
When barium aluminium alloy ", the rational design of other elements meets the atmospheric corrosion resistance requirement of weld(ing) deposit, so that atmospheric corrosion resistance
Performance improves significantly, but lower yield strength, tensile strength, yield tensile ratio are undesirable, and it is then big that low-temperature impact absorbs energy value
It is lower than required value greatly；2. adding " nano silicon nitride titanium valve, nano-cerium oxide, FeAl8Ba12Ca6Si40 Si-Ca-Ba aluminium in the present invention
When alloy ", the rational design of element meets the atmospheric corrosion resistance requirement of weld(ing) deposit, and lower yield strength, is bent at tensile strength
Strong ratio, low-temperature impact absorb energy value and meet the requirements.
It should be pointed out that core of innovation of the invention is to give the constituent ingredient of medicine core and dosage, especially
It is added to Nano titanium nitride, nano-cerium oxide, FeAl8Ba12Ca6Si40 silico-calcium barium aluminium alloy in medicine core powder, and has determined each
The zone of reasonableness of component is realized under the premise of ensuring use intensity by the complex intensifying of multiple element, effectively improves low temperature
Impact flexibility reduces yield tensile ratio, enhances atmospheric corrosion resistance.The especially addition of nanoscale titanium nitride is dissolved part N
Yu Tiezhong forms clearance-type solid solution, significantly improves the low-temperature impact toughness of deposited metal；Undecomposed Nano titanium nitride and
The nano-cerium oxide surface atom of addition has high chemical activity, it is easy to increase its diffusion coefficient in conjunction with other atoms
Greatly, the crystal grain for refining deposited metal increases its intensity and low-temperature impact toughness；In addition FeAl8Ba12Ca6Si40 Si-Ca-Ba aluminium closes
The addition of gold has purified the chemical component of deposited metal, improves the comprehensive mechanical property of weld seam.
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 Q550qE, including crust and medicine core, the drug core component and dosage press quality hundred
Divide ratio to be calculated as: nano silicon nitride titanium valve 0.8% ~ 1.8%, nano-cerium oxide 0.3% ~ 1.2%, FeAl8Ba12Ca6Si40 Si-Ca-Ba aluminium close
0.2% ~ 0.5%, Nb of gold powder 0.2% ~ 0.35%, Cr powder 0.8% ~ 1.2%, Ni powder 2.0% ~ 3.0%, Mo powder 3.5% ~ 6.0%, Cu powder 0.5%
~ 1.0%, Mn powder 5.0% ~ 6.0%, NaF powder 1.8% ~ 3.0%, surplus are iron powder, the partial size of the nano silicon nitride titanium valve is 20 ~
80nm, the partial size of the nano-cerium oxide are 20 ~ 100nm.
2. the mating flux-cored wire of bridge steel Q550qE according to claim 1, which is characterized in that the medicine core quality accounts for medicine
The 25% ~ 28% of core welding wire gross mass.
3. the mating flux-cored wire of bridge steel Q550qE according to claim 1, the 80 mesh percent of pass of medicine core powder are
100%.
4. the mating flux-cored wire of bridge steel Q550qE according to claim 1, the crust is 8 ~ 18mm of width, thickness
The low-carbon cold rolling steel band of 0.4 ~ 1.2mm.
5. the mating flux-cored wire of bridge steel Q550qE described in one of -4 according to claim 1, which is characterized in that the welding wire is straight
Diameter is 1.2 ~ 3.2mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110026708A (en) * | 2019-05-16 | 2019-07-19 | 江苏师范大学 | One kind O containing nano Ce2, Nb welding wire and its application method |
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| WO2008014801A1 (en) * | 2006-07-31 | 2008-02-07 | Ab Skf | A method for deposition of dispersion-strengthened coatings and composite electrode material for deposition of such coatings |
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| CN105269183A (en) * | 2015-12-01 | 2016-01-27 | 哈尔滨工业大学 | Flux core for nano-modified boron-containing high-chromium iron hardfacing self-protection flux-cored wire |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110026708A (en) * | 2019-05-16 | 2019-07-19 | 江苏师范大学 | One kind O containing nano Ce2, Nb welding wire and its application method |
| CN110026708B (en) * | 2019-05-16 | 2021-06-11 | 江苏师范大学 | Welding method of dual-phase steel |
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