CN108115306A - A kind of slag Welding flux-cored wire - Google Patents
A kind of slag Welding flux-cored wire Download PDFInfo
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- CN108115306A CN108115306A CN201611060354.0A CN201611060354A CN108115306A CN 108115306 A CN108115306 A CN 108115306A CN 201611060354 A CN201611060354 A CN 201611060354A CN 108115306 A CN108115306 A CN 108115306A
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- welding
- weld metal
- slag
- wire
- cored wire
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The present invention provides a kind of flux-cored wire available for slag Welding, which is the flux-cored wire of intracutaneous filler alloys and mineral dust outside steel, and wherein alloy and mineral dust contains compared with welding wire gross mass：C：0.03 ~ 0.10%, Si：0.15 ~ 0.40%, Mn：1.00 ~ 1.60%, Ni：0.10 ~ 1.00%, Mo：0.30 ~ 0.60%, Ti：0.05 ~ 0.10%, B：0.003 ~ 0.005%, TiO2：3.0 ~ 5.0%, Al2O3：0.3 ~ 0.5%, MgO：0.50 ~ 1.50%, remaining is iron and inevitable impurity.The welding wire can be used for the 600MPa grades of slag Weldings with upper steel plate, as thermal weld stress≤1000kJ/cm, weld metal tensile strength >=600MPa, and 60 DEG C of ballistic work >=100J.
Description
Technical field
The present invention relates to a kind of slag Welding flux-cored wire, suitable for the fields such as ship, Hai Gong, building, bridge thickness
The steel plate slag Welding of≤120mm is used, and belongs to field of welding material.
Background technology
In recent years, with the development of efficient welding technology, slag Welding technology is in fields such as ship, Hai Gong, building, bridges
It is more and more extensive to be applied, but slag Welding process due to heat input it is larger, cause that weld seam cooling velocity is excessively slow, weld seam
Microstructure coarsening, and then cause the deterioration of weld metal low-temperature flexibility.
At present, for the welding wire of slag Welding, have some correlation techniques, such as：JP8164497A and
JP59179289A uses electroslag welding wire made from Cr-Ni-Mo technologies, available for tensile strength 500MPa with the welding of upper steel plate,
But its welding point low-temperature flexibility is poor, is only capable of meeting 0 DEG C of ballistic work >=20J；JP2003340592A and JP2004058142A
Using Mo-Ti-B technologies, and pass through pro-eutectoid ferrite in the method inhibition weld metal cooling procedure for add Cr, V and Nb
It is formed, promotes Intragranular Acicular Ferrite forming core, so that 0 DEG C of ballistic work >=100J of weld metal；JP2009154199A then passes through
The affecting laws of Ti-B element Resistance of Weld Metal toughness are studied, devise a kind of low-carbon coppering-free solid solder wire so that weld seam gold
The 0 DEG C of ballistic work >=70J belonged to；And JP2009045671A is on the basis of Mo+Ti+B technology paths, by adding strong deoxidier Mg,
Ca or REM, to enhance the forming core of Intragranular Acicular Ferrite, using the welding wire welding 60mm steel plates weld metal 0 DEG C of ballistic work >=
100J, more than existing patent welding wire mainly for common building steel construction etc., and weld seam obtained only possesses 0 DEG C of impact
Energy；Although patent CN103350290B is aided with Mo-Ti-B technologies by adding substantial amounts of Ni elements (3.5~5.5%),
The impact flexibility of weld metal has been increased to -40 DEG C of ballistic work >=180J, but it is the disadvantage is that, add substantial amounts of Ni elements,
On the one hand so that the drawing process of welding wire is difficult, on the other hand but also the manufacture cost of welding wire greatly increases.
By above-mentioned analysis, solid core welding wire is focused on currently for designing and developing for electroslag welding wire, and in order to true
The mechanical property of weld metal is protected, often adds more alloying component in welding wire, this has resulted in the intensity of finished product welding wire
Excessively high, and in drawing, more difficult for the diameter control of welding wire, it is uneven to be easy to cause gage of wire, welding wire intensity mistake
Wire feed process is unstable when high and diameter unevenness can cause welding, phenomena such as being susceptible to card silk, current interruption, for slag Welding
Speech, card silk, current interruption are unacceptable critical defects.Though there have patent CN200710134163 to disclose to be a kind of available for big line energy
The flux-cored wire of welding is measured, but its thermal weld stress can only achieve 60kJ/cm, and the heat input that electroslag welding is much not achieved will
It asks.
In recent years, as requirement of the industries such as ship, Hai Gong, building, bridge to safety coefficient is higher and higher, to weld seam gold
The impact flexibility requirement of category is also gradually stepping up.At present, in ship, Hai Gong, building, the isostructural construction of bridge, have compared with
The use of F grades more (it is required that -60 DEG C of ballistic work >=47J) steel plates, but due to the shortage of mating electroslag welding wire, it is impossible to carry out electroslag welding
It connects, greatly reduces welding efficiency.
The content of the invention
It is an object of the invention to provide a kind of flux-cored wires for slag Welding, use welding made from the welding wire
Connector comprehensive mechanical property is excellent, welding point tensile strength >=600MPa, -60 DEG C of ballistic work >=100J, and welding procedure
Process is stablized, and can be widely used for the fields such as ship, Hai Gong, building, bridge.
For achieving the above object, present invention employs following designing schemes：
One kind is used for slag Welding flux-cored wire, it is characterised in that：By intracutaneous coated metal and mineral dust outside steel
Composition, compared with welding wire gross mass, contains：C：0.03~0.10%, Si：0.15~0.40%, Mn：1.00~1.80%, Ni：
0.10~1.00%, Mo：0.10~1.00%, Ti：0.05~0.10%, B：0.001~0.005%, TiO2：3.0~
5.0%, Al2O3：0.3~0.5%, MgO：0.50~1.50%, remaining is iron and inevitable impurity.
Component of weld wire design principle of the present invention is as follows：
C is essential element in steel, suitable C members addition, can effectively improve the intensity of weld metal, but C content
Excessively high, the low-temperature flexibility of Resistance of Weld Metal is unfavorable, while can also increase the cool attenuation of weld metal, therefore in the present invention
C content need to be controlled in the range of 0.03~0.10%.
Si has stronger solution strengthening effect, while can ensure that the ductility of weld metal, and in the welding process,
It can also combine with Mn and play deoxidation, but the deoxidation products of Si easily forms silicates slag inclusion, the silicate of low melting point
Solidification cracking is easy to cause, can also increase slag with melting the viscosity of metal, serious splashing be caused, so Si contents should not mistake
Height need to be controlled 0.15~0.40%.
Mn can increase substantially the intensity of weld metal, and in the welding process, Resistance of Weld Metal can play certain
Deoxidation.When Mn contents be less than 1.0% when, weld metal quenching degree deficiency, and higher than 1.8% when, then be easy to cause partially
Analysis, the toughness of Resistance of Weld Metal are unfavorable.Therefore, the control of Mn contents is 1.0~1.8%.
On the one hand the addition of Ni elements can properly increase the intensity of weld metal, while can also improve the low of weld metal
Warm toughness.When Ni contents be less than 0.1% when, act on unobvious, and content be higher than 1.0% when, then can increase weld metal
Viscosity, is unfavorable for inclusion floating discharge during welding in weld metal, and the low-temperature flexibility of Resistance of Weld Metal is unfavorable.
Mo is strong quenching degree element, appropriate to add, and can effectively inhibit austenite from being transformed into perlite, and with refinement
The effect of ferrite crystal grain, while improve the intensity and low-temperature flexibility of weld metal.When Mo contents are less than 0.3%, to pearl
The inhibitory action deficiency of body of light transformation, and during higher than 1.0%, then it can cause to be formed in weld metal a large amount of because of its strong quenching degree
Martensitic structure, the strong low-temperature flexibility for destroying weld metal.
Ti has strong deoxidation, and appropriate addition can effectively reduce the oxygen content in weld metal, and in weld metal
Middle oxygen containing Ti, the nitride for forming a large amount of small and dispersed distributions, as forming core of the weld metal from austenite to ferritic transformation
Particle, fining ferrite grains size, to improve the low-temperature flexibility of weld metal.It, can significantly but when Ti contents are more than 0.10%
Degree improves the viscosity of weld metal, and the deoxidation products of Ti is easily assembled agglomerating, and the oxide for forming bulky grain is mingled with, seriously
Destroy the low-temperature flexibility of weld metal.Therefore the preferred scope of Ti contents is set as 0.05~0.10%.
The addition of B can be solid-solution at the austenite grain boundary of weld metal, the pro-eutectoid ferrite in inhibition weld metal
It is formed, reduces the tendency that Edge crystal crack occurs when absorbing impact load for weld metal, improve the low-temperature flexibility of weld metal.But
The unsuitable excessive addition of B element, excessive B are easily combined with the N element in weld metal, are formed acicular BN particles, are reduced weldering
Stitch the low-temperature flexibility of metal.Therefore B content control is in the range of 0.001~0.005%.
TiO2Addition on the one hand can weld metal surface layer formed slag, protect weld metal, another aspect TiO2Fusing
Can ensure there is the solubility of certain Ti elements in slag afterwards, avoid the Ti member procatarxis in weld metal into slag transition and drop
The recovery rate of low Ti elements deteriorates so as to cause the mechanical property of weld metal.
Al2O3Addition added to improve welding fabrication, slag Welding is usually used in welding box-shaped hole, weldering
It is angle welding to stitch the surrounding that is contacted with by welding steel plate, easy slag inclusion, and suitable Al2O3Addition can improve weld metal and quilt
Wetability between welding steel plate avoids the situation of slag inclusion from occurring.But Al2O3Additive amount be less than 0.3% when, expected effect is not achieved
Fruit, if it is difficult to depart from it will cause slag higher than 0.5%, therefore Al2O3Additive amount control for 0.3~0.5%.
The addition of MgO can play the role of the inclusion conditioning in Resistance of Weld Metal, if without the presence of MgO, Ti's
Oxide is easily assembled, and forms larger inclusion particle, the performance of Resistance of Weld Metal is unfavorable, and suitable addition MgO, is welding
In termination process, the oxide of Ti can be crushed, re-formed using MgO as core, the particle of one layer of Ti oxide of outer layer covers,
So as to have the function that refine the oxide particle in weld metal.When the additive amount of MgO is less than 0.5%, this refinement changes
Property effect unobvious, and when MgO additive amounts be higher than 1.5% when, then it is this refinement modifying function no longer continued to increase, therefore
The additive amount of MgO is set as 0.3~0.5%.
Steel crust used is low-carbon low-alloy steel in the present invention, and composition range is：C≤0.05%, Si≤
0.15%, Mn≤0.60%, remaining is Fe and inevitable impurity element.
Compared with prior art, advantageous effect of the present invention at least that：
(1) innovative Ti+TiO2+ MgO composition designs so that the welding wire is welded available for the steel plate of thickness≤120mm,
For thermal weld stress up to 1000kJ/cm, the electroslag welding joint comprehensive mechanical property obtained using the welding wire is excellent, and tensile strength >=
600MPa, -60 DEG C of ballistic work >=80J.
(2) solid core welding wire is replaced using flux-cored wire composition design, reduced caused by adding more alloying element
Solid core welding wire is difficult to the problem of drawing, and ensure that the rational intensity of welding wire and uniform diameter so that slag Welding process
Phenomena such as more stablizing, avoiding welding process wire feed interim card, current interruption.
Specific embodiment
Technical scheme is further described below in conjunction with preferred embodiment.
Embodiment：
In steel crust, (steel crust ingredient is：0.02%C, 0.05%Si, 0.50%Mn, 0.012%P, 0.006%
S, remaining is Fe and inevitable impurity element) filler alloys and mineral medicinal powder in the pipe that is rolled into, it is made through drawing such as 1 institute of table
The flux-cored wire of the diameter 1.6mm shown, for wherein No.1~No.5 to meet the embodiment of the present invention, No.6~No.10 is not exist
The comparative example of present component scope.
1 embodiment welding wire chemical composition of table
Slag Welding, welding procedure such as table are carried out to 600MPa grades 60 and 120mm steel plates using the welding wire in table 1 respectively
Shown in 2, and fault detection and mechanics properties testing are carried out to gained welding point, as a result as shown in Table 3 and Table 4.
2 thermit process of table
3 60mm steel plate welding point inspection results of table
4 120mm steel plate welding point inspection results of table
By above-described embodiment, electroslag welding flux-cored wire of the present invention, in the thermal weld stress condition of 1000kJ/cm
Under, tensile strength >=600MPa of weld metal, -60 DEG C of ballistic work >=100J can be applied to the passes such as extremely cold area ship, bridge
The welding of the big thickness steel plate of key load-bearing.
Claims (2)
1. a kind of slag Welding flux-cored wire, it is characterised in that：The welding wire is by intracutaneous coated metal and mineral dust outside steel
Composition, compared with welding wire gross mass, contains：C：0.03 ~ 0.10%, Si：0.15 ~ 0.40%, Mn：1.00 ~ 1.60%, Ni：0.10
~ 1.00%, Mo：0.10 ~ 1.00%, Ti：0.05 ~ 0.10%, B：0.001 ~ 0.005%, TiO2：3.0 ~ 5.0%, Al2O3：0.3~
0.5%, MgO：0.50 ~ 1.50%, remaining is iron and inevitable impurity.
2. the slag Welding flux-cored wire according to claims 1, it is characterised in that：In the welding of≤1000kJ/cm
Under the conditions of heat input, tensile strength >=600MPa of weld metal, -60 DEG C of ballistic work >=100J.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611060354.0A CN108115306A (en) | 2016-11-28 | 2016-11-28 | A kind of slag Welding flux-cored wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611060354.0A CN108115306A (en) | 2016-11-28 | 2016-11-28 | A kind of slag Welding flux-cored wire |
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| Publication Number | Publication Date |
|---|---|
| CN108115306A true CN108115306A (en) | 2018-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611060354.0A Pending CN108115306A (en) | 2016-11-28 | 2016-11-28 | A kind of slag Welding flux-cored wire |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110587179A (en) * | 2019-09-03 | 2019-12-20 | 西安理工大学 | Self-protection flux-cored wire for welding T2 copper and 304 stainless steel and preparation method thereof |
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|---|---|---|---|---|
| KR100427546B1 (en) * | 2001-09-06 | 2004-04-30 | 고려용접봉 주식회사 | Basic flux cored wire |
| CN102233493A (en) * | 2010-04-27 | 2011-11-09 | 昆山京群焊材科技有限公司 | Submerged-arc welding wire and welding flux for high-intensity low-temperature steel |
| JP4954122B2 (en) * | 2008-02-28 | 2012-06-13 | Ｊｆｅスチール株式会社 | Large heat input electroslag welding method |
| CN102528332A (en) * | 2010-12-20 | 2012-07-04 | 昆山京群焊材科技有限公司 | High-strength low-temperature-resistant TiO2-series CO2 gas-shielded low-hydrogen type flux-cored wire |
| CN104259633A (en) * | 2014-07-22 | 2015-01-07 | 江苏省沙钢钢铁研究院有限公司 | Efficient single-face submerged arc welding method |
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| KR100427546B1 (en) * | 2001-09-06 | 2004-04-30 | 고려용접봉 주식회사 | Basic flux cored wire |
| JP4954122B2 (en) * | 2008-02-28 | 2012-06-13 | Ｊｆｅスチール株式会社 | Large heat input electroslag welding method |
| CN102233493A (en) * | 2010-04-27 | 2011-11-09 | 昆山京群焊材科技有限公司 | Submerged-arc welding wire and welding flux for high-intensity low-temperature steel |
| CN102528332A (en) * | 2010-12-20 | 2012-07-04 | 昆山京群焊材科技有限公司 | High-strength low-temperature-resistant TiO2-series CO2 gas-shielded low-hydrogen type flux-cored wire |
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Non-Patent Citations (2)
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| 毛新平等: "《钛微合金钢》", 31 August 2016, 冶金工业出版社 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110587179A (en) * | 2019-09-03 | 2019-12-20 | 西安理工大学 | Self-protection flux-cored wire for welding T2 copper and 304 stainless steel and preparation method thereof |
| CN110587179B (en) * | 2019-09-03 | 2021-11-16 | 西安理工大学 | Self-protection flux-cored wire for welding T2 copper and 304 stainless steel and preparation method thereof |
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Application publication date: 20180605 |