CN106475708A - Gas shielded arc welding solid welding wire for X80 pipe line steel boxing seam welding - Google Patents
Gas shielded arc welding solid welding wire for X80 pipe line steel boxing seam welding Download PDFInfo
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- CN106475708A CN106475708A CN201710001302.4A CN201710001302A CN106475708A CN 106475708 A CN106475708 A CN 106475708A CN 201710001302 A CN201710001302 A CN 201710001302A CN 106475708 A CN106475708 A CN 106475708A
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- welding
- pipe line
- welding wire
- line steel
- gas shielded
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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
- B23K35/3073—Fe as the principal constituent with Mn as next major constituent
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention discloses a kind of gas shielded arc welding solid welding wire for X80 pipe line steel boxing seam welding, chemical composition is by mass percentage：C：0.05% 0.10%；Si：0.70% 1.00%；Mn：1.45% 1.75%；P ＜ 0.010%；S ＜ 0.005%；Cr：0.40% 0.60%；Ti：0.06% 0.10%；Ni：0.90% 1.10%；Balance of Fe.The gas shielded arc welding solid welding wire of the present invention, is development supporting exclusively for X80 pipe line steel.Welding wire has good welding technological properties, and the weldability that can adapt to X80 pipe line steel is required, weld metal obdurability coupling is good, the outstanding feature with high-strength, high tenacity.X80 steel conduit Full-automatic welding impact flexibility KV2(10 DEG C) >=80J, can be used for the full-automatic and semi-automatic welding of the pipe line steels such as X80.
Description
Technical field
The invention belongs to welding material, more particularly to a kind of gas shielded arc welding for X80 pipe line steel boxing seam welding
Solid welding wire, it is adaptable to X80 level pipeline steel tube girth joint all-position welding.
Background technology
Safe and reliable, the economic and continual feature that pipeline oil transportation (gas) shows is that other modes are incomparable.
With long range, Large Diameter Pipeline, high-pressure delivery mode and polar region, ocean, the construction of oil gas pipeline and use, outstanding to pipe line steel
The requirement of its line pipe is also more and more stricter.The economy that builds in order to ensure feed-line, the safety and reliability for running,
Do not require nothing more than pipe line steel itself and there is excellent toughness, and also require that welding material has excellent toughness.Due to welding
Journey feature inherently, often so that the toughness of the Toughness Ratio pipe line steel of line pipe welding point is more difficult to control, this becomes defeated
The weak link of pipeline is sent, the low-temperature flexibility for controlling and improving joint to greatest extent is that pipeliner author needs urgent solution
One of problem.Oil and gas pipes engineering is a large-scale Site Welding installing engineering.In pipe-line construction, welding procedure operation
Point is constantly migrated as pipeline extends, and natural environment is complicated and changeable, and a long distance pipeline can run into multiple people in process of construction
Literary environment, geology pattern and weather conditions.For adapting to different welding surroundings, the selection of Welding of pipeline construction is multiple many
Sample.World Developed Countries pipeline girth weld is mainly welded using gas shielded solid welding wire automatic welding, China's automatic welding journey
Degree is low, and pipeline girth weld is mainly welded using self-protection flux-cored wire semiautomatic welding.With conveyance conduit intensity, diameter and
The continuous improvement of wall thickness, welding procedure labour intensity strengthen, and site girth welding seam welding material, the selectable scope of welding procedure are got over
Come narrower, welding procedure difficulty is increasing, it is difficult to ensure that weld seam has the performance identical or close with mother metal, site girth welding skill
Art become restriction high intensity, the Main Bottleneck self-protection flux-cored wire semiautomatic welding of thick-wall pipeline steel application due to equipment once
Property invest little, flexible operation, strong to environment and adaptability for working condition, occupied leading position in China's pipe laying, but which be right
The requirement of welder's operative skill is higher, and weld metal combination property has declined with the raising of steel strength grade, in Hi-grade steel
The limitation that applies in pipeline is increasing.Although the big but welding efficiency of gas shielded solid welding wire automatic welding equipment one-time investment
Height, is not affected by human factors the control and management for being conducive to welding quality, and weld metal combination property is high, in high-strength grade of steel pipe
Application prospect in road is good.
Content of the invention
The technical problem to be solved is to provide a kind of gas shield for X80 pipe line steel boxing seam welding
Weldering solid welding wire, with high intensity and excellent low-temperature impact toughness.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is：One kind is used for X80 pipe line steel boxing seam weld
The gas shielded arc welding solid welding wire for connecing, chemical composition is by mass percentage：C：0.05%-0.10%；Si：0.70%-
1.00%；Mn：1.45%-1.75%；P ＜ 0.010%；S ＜ 0.005%；Cr：0.40%-0.60%；Ti：0.06%-
0.10%；Ni：0.90%-1.10%；Balance of Fe.
The invention has the beneficial effects as follows：Weld metal has high intensity and excellent low-temperature impact toughness, all position welding
Skill is functional, and the face of weld of diverse location is smooth, uniform, and welding bead pattern is attractive in appearance.Welding suitable for X80 level pipe line steel.
Specific embodiment
The gas shielded arc welding solid welding wire for X80 pipe line steel boxing seam welding of the present invention, chemical composition press quality hundred
Point ratio is：C：0.05%-0.10%；Si：0.70%-1.00%；Mn：1.45%-1.75%；P ＜ 0.010%；S ＜
0.005%；Cr：0.40%-0.60%；Ti：0.06%-0.10%；Ni：0.90%-1.10%；Balance of Fe.
C is to ensure that the essential element of weld metal intensity, but too high C element can cause splashing, the technique for affecting welding wire
Performance, while can also promote the formation of high carbon martensite, affects the impact flexibility of weld metal.Control carbon is in suitable model
Enclose the welding technological properties and weld seam obdurability that can ensure that welding wire, therefore the C content control in welding wire of the present invention 0.05～
In the range of 0.10%.
Si is deoxidant element, also functions to the effect of solution strengthening.Si can increase the intensity of weld metal, but make weld metal
Toughness decline.In welding wire, Si content is low, and deoxidation is insufficient, affects the low-temperature impact toughness of weld seam；Si too high levels, promote
Weld metal hardens, and reduces the low-temperature flexibility of weld metal, while spatter increases, welding procedure declines.In welding wire
Containing appropriate Si, non-metallic inclusion in weld seam can be both reduced, the impact flexibility of weld metal, welding wire of the present invention can have been improved again
The control of middle Si content is between 0.70～1.00%.
It is deoxidant element again that Mn is the intensified element of weld metal, must have enough Mn contents to can be only achieved deoxidation in welding wire
Effect.Mn is austenite stabilizer element, adds Mn improve the volume fraction of weld metal acicular ferrite, subtract in welding wire
Few pro-eutectoid ferrite quantity, while the low-carbon bainite that is also easy to get is organized, the increase of manganese content can both put forward steel high tenacity, and
Steel strength can be improved.Therefore in welding wire of the present invention the control of Mn content between 1.45～1.75%.
Cr is the element for expanding γ phase region, reduces γ → α phase transformation critical-temperature, converts the austenite at a lower temperature
Carry out.The hardness of weld metal is cumulative with the increase of Cr content, substantially linearly increases in low Mn content, but in high Mn
Then in non-linear during content.Impact of the Cr to weld strength is similar to Mn, and with the increase of Cr content, weld metal intensity increases
Greatly, simply the effect of Cr is weak compared with Mn, when Cr content is more than 0.6%, with the increase of Cr content, generates the side plate bar iron with the second phase
Ferritic, and deteriorate the toughness of weld seam.Therefore in welding wire of the present invention the control of Cr content between 0.40～0.60%.
Ni is austenite stabilizer element, and Ni is infinitely solid-solution in γ-Fe, also plays solution strengthening effect in weld metal,
Acicular ferrite can be increased and separate out thinning microstructure.The effect of Ni is similar to Mn, simply weak compared with the effect of Mn, is weak reinforced alloys unit
Element.In the range of the whole cooling velocity of weld metal, Ni reduces can phase transition temperature, and starts ferrite side plate
Transition temperature reduces degree and is significantly greater than the reduction that acicular ferrite starts transition temperature.When in weld metal containing Mn, Ni
This effect be more beneficial for the formation of acicular ferrite.Therefore in welding wire of the present invention Ni content control 0.90～1.10% it
Between.
Ti is added as microalloy element, is added micro Ti and N to form TiN particle, is effectively prevented the category of weld seam gold brilliant
Grain length is big, and crystal grain thinning, Ti can also reduce pro-eutectoid ferrite and be formed, and increases acicular ferrite content.
S, P are harmful elements, the performance of severe exacerbation weld seam, are mainly manifested in reduction upper mounting plate toughness and improve tough crisp turn
Temperature, causes hydrogen induced cracking (HIC).In the case of content identical, 4 times of P of illeffects of S.Therefore strictly to control in weld seam
The content of the content of S, P, especially S, limits their damaging effect.In the present invention, S, P control in S ＜ 0.005%, P ＜
0.010%.
The welding wire of the present invention adopts 80%Ar+20%CO2Rich argon mixture gas are welded, and spatter is little, arc stability
Good with all positon operability, appearance of weld is attractive in appearance, and the welding technological properties of welding wire is excellent.
The welding wire of the present invention adopts 80%Ar+20%CO2Rich argon mixture gas are welded, yield strength Rel of deposited metal
>=470MPa, tensile strength Rm >=550MPa, elongation percentage A >=20%, -40 DEG C of ballistic work KV2≥47J.
The alternative import welding wire of the present invention, can significantly reduce long distance oil-gas feed-line construction cost, with significant
Economic benefit and social benefit.
Specifically, using desulphurised hot metal, control into stove molten steel sulfur content, using pneumatic steelmaking, low from S, P content
Raw material, using top bottom blowing technique, C, S, P of smelting endpoint are controlled in relatively low level, after deoxidation alloying,
Using furnace outer refining process such as LF stoves, smelt the satisfactory molten steel of composition, molten steel is cast into company through kind casting machine full guard
Strand, continuous casting billet are rolled into the wire rod of Φ 5.5mm through high speed twist-free mill.It is hot candied that wire rod applies borax through pickling of peeling off
Φ 1.0mm or Φ 1.2mm finished product welding wire are made in copper facing.
Gas protection wire chemical composition in 1 example of table
2 example welding wire deposited metal mechanical property of table
Embodiment described above is merely to illustrate the technological thought of the present invention and feature, its object is to make in the art
Technical staff it will be appreciated that present disclosure implementing according to this, it is impossible to only limit the patent model of the present invention with the present embodiment
Enclose, i.e., equal change or modification that all disclosed spirit is made, still fall in the scope of the claims of the present invention.
Claims (1)
1. a kind of gas shielded arc welding solid welding wire for X80 pipe line steel boxing seam welding, it is characterised in that chemical composition presses matter
Measuring percentage is：C：0.05%-0.10%；Si：0.70%-1.00%；Mn：1.45%-1.75%；P ＜ 0.010%；S ＜
0.005%；Cr：0.40%-0.60%；Ti：0.06%-0.10%；Ni：0.90%-1.10%；Balance of Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710001302.4A CN106475708A (en) | 2017-01-03 | 2017-01-03 | Gas shielded arc welding solid welding wire for X80 pipe line steel boxing seam welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710001302.4A CN106475708A (en) | 2017-01-03 | 2017-01-03 | Gas shielded arc welding solid welding wire for X80 pipe line steel boxing seam welding |
Publications (1)
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|---|---|
| CN106475708A true CN106475708A (en) | 2017-03-08 |
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ID=58285178
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710001302.4A Pending CN106475708A (en) | 2017-01-03 | 2017-01-03 | Gas shielded arc welding solid welding wire for X80 pipe line steel boxing seam welding |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108971797A (en) * | 2018-09-25 | 2018-12-11 | 首钢集团有限公司 | A kind of silicon steel laser filling wire welding welding wire and preparation method thereof and welding method |
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| CN101104229A (en) * | 2006-11-24 | 2008-01-16 | 首钢总公司 | Submerged arc welding wire for steel pipeline |
| CN101157167A (en) * | 2007-12-03 | 2008-04-09 | 金秋生 | Low welding crack sensibility high-strength steel plate special-purpose welding wire |
| CN101234457A (en) * | 2008-02-28 | 2008-08-06 | 武汉钢铁(集团)公司 | High-strength high ductility gas protecting welding stick |
| CN101234459A (en) * | 2007-12-03 | 2008-08-06 | 金秋生 | 80 kilogram-scale low welding crack sensibility high-strength steel plate special-purpose welding stick |
| CN101549443A (en) * | 2009-05-08 | 2009-10-07 | 西安理工大学 | Submerged arc welding wire material for X80 pipeline steel and preparing method thereof |
| JP4369555B2 (en) * | 1999-04-28 | 2009-11-25 | 新日本製鐵株式会社 | High strength steel pipes and pipelines with excellent weld toughness |
| JP2010227945A (en) * | 2009-03-26 | 2010-10-14 | Kobe Steel Ltd | Weld metal having excellent strength and toughness as welded and after stress relief annealing, and weld structure joined by the weld metal |
| CN102029481A (en) * | 2009-09-30 | 2011-04-27 | 鞍钢股份有限公司 | Gas shielded welding wire with higher weatherability |
-
2017
- 2017-01-03 CN CN201710001302.4A patent/CN106475708A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4369555B2 (en) * | 1999-04-28 | 2009-11-25 | 新日本製鐵株式会社 | High strength steel pipes and pipelines with excellent weld toughness |
| CN101104229A (en) * | 2006-11-24 | 2008-01-16 | 首钢总公司 | Submerged arc welding wire for steel pipeline |
| CN101157167A (en) * | 2007-12-03 | 2008-04-09 | 金秋生 | Low welding crack sensibility high-strength steel plate special-purpose welding wire |
| CN101234459A (en) * | 2007-12-03 | 2008-08-06 | 金秋生 | 80 kilogram-scale low welding crack sensibility high-strength steel plate special-purpose welding stick |
| CN101234457A (en) * | 2008-02-28 | 2008-08-06 | 武汉钢铁(集团)公司 | High-strength high ductility gas protecting welding stick |
| JP2010227945A (en) * | 2009-03-26 | 2010-10-14 | Kobe Steel Ltd | Weld metal having excellent strength and toughness as welded and after stress relief annealing, and weld structure joined by the weld metal |
| CN101549443A (en) * | 2009-05-08 | 2009-10-07 | 西安理工大学 | Submerged arc welding wire material for X80 pipeline steel and preparing method thereof |
| CN102029481A (en) * | 2009-09-30 | 2011-04-27 | 鞍钢股份有限公司 | Gas shielded welding wire with higher weatherability |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108971797A (en) * | 2018-09-25 | 2018-12-11 | 首钢集团有限公司 | A kind of silicon steel laser filling wire welding welding wire and preparation method thereof and welding method |
| CN108971797B (en) * | 2018-09-25 | 2021-03-23 | 首钢集团有限公司 | Welding wire for silicon steel laser wire filling welding and preparation method and welding method thereof |
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Application publication date: 20170308 |
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