CN107009049A - One kind is applied to below L360/X52 low level pipe line steel submerged arc welding welding wires - Google Patents
One kind is applied to below L360/X52 low level pipe line steel submerged arc welding welding wires Download PDFInfo
- Publication number
- CN107009049A CN107009049A CN201710373783.1A CN201710373783A CN107009049A CN 107009049 A CN107009049 A CN 107009049A CN 201710373783 A CN201710373783 A CN 201710373783A CN 107009049 A CN107009049 A CN 107009049A
- Authority
- CN
- China
- Prior art keywords
- welding
- pipe line
- submerged arc
- line steel
- low level
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- B23K35/3073—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
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
Abstract
It is applied to below L360/X52 low level pipe line steel submerged arc welding welding wires the invention discloses one kind, the chemical composition of the welding wire is by mass percentage：0.05≤C≤0.10；0.5≤Mn≤1.8；0.10≤Si≤0.30；P≤0.015；S≤0.01；0.20≤Cr≤0.30；0.10≤Cu≤0.25；0.01≤Ti≤0.03, remaining is Fe, it is engaged using welding wire of the present invention with SJ301 solder flux after being connect to the inside and outside double-submerged arc of below L360/X52 low levels pipe line steel progress, the tensile strength ＞ 460MPa of weld seam, welding point impact flexibility ＞ 100J at 10 DEG C.
Description
Technical field:
The invention belongs to submerged-arc welding wire technical field, and in particular to one kind is applied to below L360/X52 low level pipelines
Steel submerged arc welding welding wire.
Background technology:
In recent years, with China's city oil, natural gas, water power, heating power resources requirement and city, road, traffic
Etc. the continuous growth of infrastructure, on the one hand steel pipe is mainly used in city Quo of Gathering Network, the municipal administration pipe such as water delivery, heating power
Road, steel pipe used in this municipal pipeline generally has the characteristics of pressure-bearing is small, throughput rate is big, therefore, requires relatively low to the grade of steel of steel pipe,
It is also more loose to the Quality and property requirement of steel pipe；Another aspect steel pipe main company of playing in terms of bridge, highway, building
Connect, support, enclosing the effect such as water, requiring relatively low for the obdurability of steel pipe, remaining performance is more loose.
In view of more than, municipal administration and structure connection use below L360/X52 grade of steels mostly with steel pipe.At present, to such steel
In the welding process of pipe, many H08MnMoA welding wires higher using alloy content not only cause the increase of steel-pipe welding cost, and
Weld strength, excessive high hardness, severe exacerbation steel tube performance.Existing welding material, it has been disclosed that patented technology as " publication No. is
CN103121149A, the 65ksi intensity rank pipe line steels submerged-arc welding wire of entitled carbon dioxide corrosion-resistant " and " publication No.
For CN103143856A, the high intensity levels pipe line steel submerged-arc welding wire of entitled carbon dioxide corrosion-resistant " above-mentioned two is special
The Cr contents of sharp welding wire are very high, and containing V, B and Nb element, Cr elements, which are mainly, prevents the further development of corrosion.And this
The welding wire of invention, which is mainly, to be applied to require relatively low to the obdurability of steel pipe, remaining performance more loose pipe line steel, and main
If for the welding wire of below L360/X52 grade of steel research and designs.
The content of the invention：
It is applied to below L360/X52 low level pipe line steel submerged arc welding welding wires it is an object of the invention to provide one kind,
Submerged arc welding is carried out with corresponding solder flux and raw material matching using welding wire of the present invention, not only welding cost is low, and weld seam is stretched
Moderate strength, impact flexibility is excellent.
To solve the above problems, the technical solution adopted by the present invention is：One kind be don't bother about suitable for below L360/X52 is rudimentary
Line steel submerged arc welding welding wire, the chemical composition of the welding wire is by mass percentage：0.05≤C≤0.10；0.5≤Mn≤
1.8；0.10≤Si≤0.30；P≤0.015；S≤0.01；0.20≤Cr≤0.30；0.10≤Cu≤0.25；0.01≤Ti≤
0.03, remaining is Fe.
Chemical composition of the present invention proposes that component of weld wire mentality of designing is as follows from C-Mn-Cr-Ti alloy systems：
(1) C plays an important role as the main intensified element in seam organization for weld seam tensile property, but with
The increase of carbon content, it will cause hardness to raise, and when reaching to a certain degree, organizational composition can be changed, there is complex phase group
Knit.There is scaling loss in view of C in welding process, so by C controls 0.05~1.8.
(2) mechanical property of Mn content Resistance of Weld Metal has a great impact, typically with the increase of Mn contents, weld seam
The yield strength and tensile strength of metal are linearly increased.In addition, Mn can also significantly reduce brittle transition temperature, and improve weldering
The impact flexibility of seam.In consideration of it, by the control of Mn contents 0.5~1.8.
(3) Si is to seam organization and performance important, and deoxidation is mainly played in weld metal, especially when
Mn, Si simultaneously in the presence of, with the increase of Mn-Si contents, the phase transition temperature of continuous coo1ing can be made gradually to reduce, structure refinement,
But simultaneously because Si is remarkably improved pearlitic transformation temperature, more thick carbide is formed in welding process, so both
The corrosive nature of weld seam can be influenceed can influence weld seam impact toughness again, therefore Si contents are 0.10~0.30.
(5) Cr can make weld seam have high wearability and little to plasticity, Toughness, meanwhile, Cr is used as medium carbon
Compound formation element, in all various carbide, chromium carbide is most tiny one kind, and it is evenly distributed in steel body product
In, so that weld seam has excellent plasticity, toughness, content should be 0.20~0.30.
(6) Cu is as the element for expanding austenite phase field, and solid solubility is smaller in iron, usually, when the copper content in steel
When below 0.25%, the resistance to corrosion of steel can be improved, increase the intensity of steel, but copper content it is higher when, it is easy during hot-working
Cause weld seam cracking, and cause welding performance to decline, cause weld seam copper brittleness phenomenon occur when serious.In consideration of it, to welding wire
Middle Cu contents control is 0.10~0.25.
(7) P and S are as impurity element, and easily generation is distributed in the meltable eutectics of austenite Fe+FeS, causes weld seam heat occur
It is crisp, cause plastic property of weld bead, toughness drastically to decline；Presence universal in the form of phosphide P, promotes gas-evolving electrodes to aggravate, but
In marine environment, phosphorus can improve the corrosion resisting property of steel again, and its content increases and will produce cold short, deteriorates the toughness of steel, institute
So that its content is controlled in P<0.015, S<0.01.
(8) Ti and C, N can form carbide, nitride or carboritride, with very high fusing point, in welding process,
These compound particles add austenite nucleating center, hinder the movement or merging of austenite grain boundary, effectively inhibit weldering
Crystal grain grows up in seam, it is ensured that weld seam has preferable toughness.
It is engaged using above-mentioned welding wire with SJ301 solder flux and inside and outside two-sided buried is carried out to below L360/X52 low levels pipe line steel
After arc welding, tensile strength the ＞ 460MPa, welding point impact flexibility ＞ 100J at -10 DEG C of weld seam.
Beneficial effects of the present invention：
1st, welding wire of the present invention connects with the inside and outside double-submerged arc of corresponding SJ301 solder flux progress, can reduce weld metal conjunction
Golden composition, causes weld seam to have the ferritic structure of refinement by the alloy formation carboritride such as Ti in mother metal and weld seam, meanwhile,
Ensure that weld seam has moderate tensile property and hardness, excellent impact flexibility, i.e.,：Weld strength ＞ 460MPa, at -10 DEG C
Impact flexibility ＞ 100J, inner and outer welding hardness is less than 22HRC.
2nd, the deposited metal R that the present invention is weldedt0.5=300~420MPa, Rm=460~580MPa, impacts at -20 DEG C
Good-toughness Akv>=27J, carries out inside and outside double-submerged arc and is connected to wide in range parameter area, is welding L360/X52 low level pipelines
Steel ideal material.
3rd, welding wire of the present invention is directed to low pressure fluid conduit and structural tube technical requirements, coordinates corresponding solder flux, can improving
On the basis of weldering property and reduction welding wire cost input, by reducing Mn, Mo, B alloying component content, slightly relax C, S, P index,
To effectively reduce low level pipe line steel welding production cost, promote tube product in city oil gas, water delivery, building, bridge, traffic
Deng the mass application in field.
Embodiment：
Example 1：Using vaccum sensitive stove, the low raw material of P, S, C impurity content need to be used, strictly carry out what S, P content were controlled
Molten iron, after deoxidation alloying, smelts and to meet the molten steel of component requirements, and burning casts continuous casting billet, is rolled through high speed twist-free mill
IntoWire rod,Wire rod is successively through derusting-cathodic pickling-borax treatment-wire drawing-degreasing-electricity of peeling off
Solution alkali cleaning-cathodic pickling-electroless copper is madeWithFinished product welding wire.The weight/mass percentage composition of the welding wire
For：C 0.06, Mn 1.05, Si 0.23, P 0.007, S 0.008, Cr 0.26, Cu 0.15；Ti 0.025；Remaining is Fe.
Welding wire of the present invention matches progress deposited metal welding with SJ301G solder flux, according to《GB/T12470-2003 submerged-arc weldings
With low alloy steel welding wire and solder flux》Standard requirement, test plate (panel) uses Q235, and thickness is 20mm, 30 ° of bevel angle, and root gap is
12mm.Welding conditions are electric current 475A~575A, voltage 27V~30V, 25 ± 1.5m/h of speed of welding；Temperature 150 ± 15 between road
DEG C, deposited metal yield strength is 385MPa, and tensile strength is 490MPa, and elongation percentage is 22.5%, and -20 DEG C of impact absorbing energies are
55J。
Welding wire of the present invention is matched with SJ301G solder flux, is that the thick L360MB pipe line steels of 9.5mm are welded to thickness,
The composition C 0.10 of L360MB pipe line steels, Si 0.16, Mn 1.14, P 0.012, S 0.008, Cu 0.17, Cr 0.03, Nb
0.01, Ti 0.017, V 0.02, Al 0.03, remaining is iron.Welding procedure mode：Joint form Y types, 35 ° of internal groove angle,
Root face size 5-6mm.Welding conditions are：Interior weldering 600~850A of welding current, 29.5~32V of weldingvoltage；Outside weld welding current
900~1150A, 30~33V of weldingvoltage, 1.62~1.98m/min of speed of welding, inside and outside double wire hidden arc welding connect, and are welded after welding
It is seamed into type good, welding toe transition is good.Weld properties the results are shown in Table 1 after welding.
The welding joint mechanical property of table 1 is detected
Example 2：Using the welding wire of above-mentioned technique productions, the weight/mass percentage composition of the welding wire is：C 0.06, Mn 1.05, Si
0.23, P 0.007, S 0.008, Cr 0.26, Cu 0.15；Ti 0.025；Remaining is Fe.
Welding wire of the present invention is matched with BG-SJ301G solder flux, and thickness is welded for 12.5mm Q235B pipe line steels,
The composition of Q235B pipe line steels is C 0.15, Si 0.22, Mn 0.22, P 0.014, S 0.01, Cu 0.06, Ni 0.04, Cr
0.02, Al 0.01, B 0.0004, remaining is iron.Technology mode is joint form X-type, 30 ° of internal groove angle, outer bevel angle
45 °, 5~6mm of root face size.Welding conditions are：Interior weldering 550~780A of welding current, 29.5~32V of weldingvoltage；Outside weld is welded
1100~1250A of electric current is met, 31~33V of weldingvoltage, 1.62~1.98m/min of speed of welding, inside and outside double wire hidden arc welding connects, welded
Connect rear appearance of weld good, welding toe transition is good, and weld properties the results are shown in Table 2 after welding.
The welding joint mechanical property of table 2 is detected
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to assert
The embodiment of the present invention is only limitted to this, for general technical staff of the technical field of the invention, is not taking off
On the premise of from present inventive concept, some simple deduction or replace can also be made, the present invention should be all considered as belonging to by institute
Claims of submission determine scope of patent protection.
Claims (2)
1. one kind is applied to below L360/X52 low level pipe line steel submerged arc welding welding wires, it is characterised in that：The welding wire
Chemical composition is by mass percentage：0.05≤C≤0.10；0.5≤Mn≤1.8；0.10≤Si≤0.30；P≤0.015；S≤
0.01；0.20≤Cr≤0.30；0.10≤Cu≤0.25；0.01≤Ti≤0.03, remaining is Fe.
2. one kind according to claim 1 is applied to below L360/X52 low level pipe line steel submerged arc welding welding wires, its
It is characterised by：The welding wire is engaged with SJ301 solder flux carries out inside and outside two-sided submerged arc to below L360/X52 low levels pipe line steel
After welding, tensile strength the ＞ 460MPa, welding point impact flexibility ＞ 100J at -10 DEG C of weld seam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710373783.1A CN107009049B (en) | 2017-05-24 | 2017-05-24 | One kind being suitable for L360/X52 or less low level pipe line steel submerged arc welding welding wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710373783.1A CN107009049B (en) | 2017-05-24 | 2017-05-24 | One kind being suitable for L360/X52 or less low level pipe line steel submerged arc welding welding wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107009049A true CN107009049A (en) | 2017-08-04 |
| CN107009049B CN107009049B (en) | 2019-07-30 |
Family
ID=59452578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710373783.1A Active CN107009049B (en) | 2017-05-24 | 2017-05-24 | One kind being suitable for L360/X52 or less low level pipe line steel submerged arc welding welding wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107009049B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61115694A (en) * | 1984-11-09 | 1986-06-03 | Kawasaki Steel Corp | Submerged arc welding method of high tensile steel |
| JPS62114796A (en) * | 1985-11-13 | 1987-05-26 | Nippon Steel Corp | Submerged arc welding method by which high-toughness weld metal is obtained |
| CN1305879A (en) * | 2001-02-28 | 2001-08-01 | 武汉钢铁(集团)公司 | High-performance welding wire for hidden arc welding of pipeline steel |
| CN1714985A (en) * | 2004-06-29 | 2006-01-04 | 宝山钢铁股份有限公司 | High strength anti-weather burial arc welding wire |
| CN101081465A (en) * | 2007-06-25 | 2007-12-05 | 宝鸡石油钢管有限责任公司 | Gas protecting welding wire for connecting pipes |
| CN101104229A (en) * | 2006-11-24 | 2008-01-16 | 首钢总公司 | Submerged arc welding wire for steel pipeline |
| CN101462207A (en) * | 2007-12-21 | 2009-06-24 | 首钢总公司 | High-ductility submerged arc welding wire for pipeline steel |
-
2017
- 2017-05-24 CN CN201710373783.1A patent/CN107009049B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61115694A (en) * | 1984-11-09 | 1986-06-03 | Kawasaki Steel Corp | Submerged arc welding method of high tensile steel |
| JPS62114796A (en) * | 1985-11-13 | 1987-05-26 | Nippon Steel Corp | Submerged arc welding method by which high-toughness weld metal is obtained |
| CN1305879A (en) * | 2001-02-28 | 2001-08-01 | 武汉钢铁(集团)公司 | High-performance welding wire for hidden arc welding of pipeline steel |
| CN1714985A (en) * | 2004-06-29 | 2006-01-04 | 宝山钢铁股份有限公司 | High strength anti-weather burial arc welding wire |
| CN101104229A (en) * | 2006-11-24 | 2008-01-16 | 首钢总公司 | Submerged arc welding wire for steel pipeline |
| CN101081465A (en) * | 2007-06-25 | 2007-12-05 | 宝鸡石油钢管有限责任公司 | Gas protecting welding wire for connecting pipes |
| CN101462207A (en) * | 2007-12-21 | 2009-06-24 | 首钢总公司 | High-ductility submerged arc welding wire for pipeline steel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107009049B (en) | 2019-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101992365B (en) | High-strength and high-tenacity gas shielded welding wire | |
| CN100441364C (en) | High ductility buried arc welding wire for low-alloy super-strength steel | |
| CN101716706B (en) | High-strength alloy solid cored welding wire | |
| CN102046325A (en) | Flux-cored wire for welding of duplex stainless steel which enables the miniaturization of solidified crystal particles | |
| CN101462207A (en) | High-ductility submerged arc welding wire for pipeline steel | |
| CN107052617A (en) | A kind of 1000MPa grade high-strengths all positon ultralow-hydrogen low flux-cored wire and its welding method | |
| CN104923989B (en) | Medicine core and gas protecting welding wire for high heat-input electro-gas (enclosed) welding gas protecting welding wire | |
| CN103737198A (en) | Gas-shielded flux-cored wire for stainless steel welding | |
| CN107900556A (en) | A kind of austenitic stainless steel self-protection flux-cored wire | |
| CN102218621B (en) | Gas shielded welding wire used for X100 pipeline steel | |
| CN101633085B (en) | Stainless steel welding wire and technology for welding same | |
| CN102756219B (en) | A kind of welding wire, wire rod and its application | |
| CN104400254A (en) | Welding wire applicable to submerged-arc welding of H2S corrosion resistant ultralow manganese pipeline steel | |
| CN103350289A (en) | Submerged-arc welding wire deposited metal with excellent low-temperature toughness and high strength | |
| CN100423880C (en) | Gas-shielded welding wire for welding high-strength steel | |
| CN110524138B (en) | X80 pipeline steel submerged arc welding wire with low cost and good low-temperature toughness | |
| CN104476008A (en) | Welding wire for high-heat-input submerged-arc welding | |
| CN102233493B (en) | Submerged-arc welding wire for high-intensity low-temperature steel | |
| CN102011067A (en) | Cavitation corrosion resistant dual-phase stainless steel | |
| CN103056550B (en) | A kind of welding wire for gas shielded welding of yield strength 900MPa rank | |
| CN101342645B (en) | High-strength high-ductility high-soldering-speed welding wire for submerged arc welding for high-level pipeline steel | |
| EP3156168B1 (en) | Submerged arc welding wire and welding method | |
| CN104588913A (en) | Welding wire for submerged-arc welding suitable for X70 offshore oil and gas conveying steel | |
| CN107914097A (en) | High-strength steel gas shield welding flux-cored wire | |
| CN103252594A (en) | Welding wire applicable to welding of X70MS/X65MS pipeline steel resisting hydrogen sulfide corrosion |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |