CN101462207A - High-ductility submerged arc welding wire for pipeline steel - Google Patents
High-ductility submerged arc welding wire for pipeline steel Download PDFInfo
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- CN101462207A CN101462207A CNA2007103036397A CN200710303639A CN101462207A CN 101462207 A CN101462207 A CN 101462207A CN A2007103036397 A CNA2007103036397 A CN A2007103036397A CN 200710303639 A CN200710303639 A CN 200710303639A CN 101462207 A CN101462207 A CN 101462207A
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Abstract
The invention relates to a high-roughness submerged arc welding wire for pipeline steel. The invention is suitable for submerged arc welding of APIX60-X70 level pipeline steel for a high-pressure oil and gas conveying pipeline and is also suitable for the submerged arc welding of steel for a pressure vessel and a bridge. The submerged arc welding wire comprises the following chemical compositions by weight percentage: 0.04 and 0.09 percent of C, 1.4 to 1.9 percent of Mn, 0.1 to 0.2 percent of Si, 0.1 to 0.3 percent of Mo, 0.07 to 0.15 percent of Ti, 0.0005 to 0.003 percent of B, 0.002 to 0.008 percent of Zr, less than or equal to 0.35 percent of Cu, less than or equal to 0.010 percent of S, less than or equal to 0.012 percent of P and the balance being Fe. When the welding wire and a welding flux SJ101 are matched for submerged arc welding, the metal tensile strength of a weld joint is between 550 and 700 MPa; impact power AkV at 40 DEG C below zero is more than or equal to 90 J; and the welding wire is suitable for the submerged arc welding of 500-700 MPa level low-alloy high-strength steel and the APIX60-X70 level pipeline steel.
Description
Technical field
The present invention relates to a kind of high-ductility submerged arc welding wire, belong to field of welding material, when this welding wire cooperates submerged arc welding with solder flux SJ101, weld metal tensile strength is 550～700Mpa,-40 ℃ of ballistic work AkV 〉=90J are suitable for the submerged arc welding of 500～700Mpa level low alloy high-strength steel and APIX60～X70 level pipeline steel plate.
Background technology
Oil, natural-gas transfer pipeline bear the complexing action of the pressure and the medium of oil, gas, because its fed distance is long, the geological conditions complexity, environmental condition is more abominable, perhaps pass through the city of population concentration, in use various fracture accidents might take place, cause serious economy loss, to personal safety and environment structure serious threat, thereby the security requirement of pipeline pipeline increased day by day.The security of pipeline is except from design, construction, use aspect are considered, it requires also increasingly stringent to its weld seam low-temperature flexibility.In recent years, many welding wire for submerged-arc welding have appearred in the world, as Japan Patent JP067205, JP143659, JP108883 and Chinese patent CN1025165C etc., above-mentioned patent welding wire for submerged-arc welding, in the requirement of having satisfied weldability and strength and toughness in varying degrees, but its toughness is generally lower, particularly low-temperature flexibility is lower.Be not suitable for that narrow-clearance submerged arc welding connects, large-line energy submerged arc welding, multi-pass welding connect.
Summary of the invention
Purpose of the present invention is to provide a kind of low-temperature flexibility good, and the high-ductility submerged arc welding wire for pipeline steel of anti-hydrogen induced cracking and corrosion resistance excellence is suitable for narrow-clearance submerged arc welding and large-line energy efficiently welds.
The present invention relates to a kind of high-ductility submerged arc welding wire for pipeline steel, its chemical composition % by weight contains: C0.04～0.09, Mn1.4～1.9, Si0.1～0.2, Mo0.1～0.3, Ti0.07～0.15, B0.0005～0.003, Zr0.002～0.008, Cu≤0.35, S≤0.010, P≤0.012, surplus are Fe.
Wherein: elements such as C, Mn, Si, Mo, Cu can improve the quenching degree of weld metal, suppress the formation of pro-eutectoid ferrite, promote acicular ferrite to form.Above-mentioned alloy system can reduce the transition temperature of acicular ferrite in certain proportion, make the acicular ferrite that changes at a lower temperature have higher dislocation density, thereby make weld metal have good tough ratio.
Alloying element Mn, Mo make weld seam have tough matrix based on solid solution in weld seam.Mn, Mo improve the ability of weld seam opposing H2S corrosion in addition.
Si, Mn have deoxidation when existing simultaneously, increase with the Si constituent content, and the phase transition temperature in the time of can making continuous the cooling reduces structure refinement gradually.Owing to contain higher Si in solder flux and the steel plate mother metal, thereby it is commonplace to increase the Si phenomenon in welding process, thereby control Si content 0.1～0.2%.
Mo, B element are postponed the ferritic transformation temperature, promote the formation of intragranular acicular ferrite, and B assembles at crystal boundary, suppress the formation of pro-eutectoid ferrite and ferrite side plate, thereby improve the toughness of weld seam.
Ti has deoxidation in welding wire, the nitride that remaining Ti forms in weld seam can be used as the forming core particle of acicular ferrite, thereby crystal grain thinning improves toughness.
Welding wire surface copper facing can be antirust, strengthens the electric conductivity and the feeding stability of welding process, and copper can carry out the transition in the weld seam in welding process.When Cu content less than 0.5% the time, play invigoration effect in the solution hardening mode, and reduce the acicular ferrite transition temperature, be beneficial to the acicular ferrite that obtains high density dislocation, determine that welding wire Cu content is≤0.35%.
S, P element butt welded seam metal low-temperature flexibility have damaging effect, should reduce as far as possible, thereby control S in the welding wire≤0.008, P≤0.012.
In a word, the transition region of the present invention by in welding wire, adding Ti, B, Mo and enlarge acicular ferrite, obtain stable acicular ferrite and obtain the microalloying effect; Si, Mn combined deoxidation make weld metal obtain suitable oxygen content; The fine acicular ferrite that adds Cu acquisition high density dislocation; Reduce the content of P, S and other impurity.Welding wire of the present invention is determined chemical composition (%): C0.04～0.09, Mn1.5～1.9, Si0.1～0.2, Mo0.1～0.3, Ti0.07～0.15, B0.0005～0.003, Zr0.002～0.008, Cu≤0.35, S≤0.010, P≤0.012, surplus are Fe.Thereby make weld metal obtain suitable alloy system, have excellent obdurability coupling.
The present invention has the following advantages:
1. welding wire welding technological properties of the present invention is stable, and weld metal has excellent comprehensive performances, has advantages of higher tensile strength and low-temperature impact toughness, has good cracking resistance.
2. welding wire of the present invention can be used for individual layer welding or multilayer welding, single-sided welding or multiaspect welding procedure, is suitable for thick plates and narrow gap welding connects, and the multiplewire submerged arc welding that is more suitable for pipe line steel connects.
3. welding wire of the present invention is strong to weld heat input and groove type adaptability, is the ideal material of large-scale steel structure welding.
4. welding wire steady quality of the present invention, when this welding wire and the submerged arc welding of SJ101 solder flux coupling, weld metal tensile strength is 550～700Mpa, and-40 ℃ of ballistic work AkV 〉=90J are suitable for the submerged arc welding of 500～700Mpa level low alloy high-strength steel and APIX60～X70 level pipeline steel plate.Satisfy that coal mine machinery, skyscraper, oil pipeline, pressure vessel, bridge spanning the sea, military project warship etc. are large-scale, the welding of the low-alloy high-strength steel of important structure.
Specific embodiment
Embodiment 1: adopt desulfurizing iron → converter smelting → LF stove refining → 160mm2 square billet casting machine full guard cast.Low-sulfur molten iron is selected in steel-making for use, carrying out desulfurizing iron when molten steel sulfur content is higher skims, smelting is carried out the steel making working procedure operation by regulations for technical operation and relevant key points for operation, when producing, arranges in tissue the top and bottom combined blown converter blowing as far as possible, and assurance is blown effect, parameters such as strict control steel-making terminal point composition, tapping temperature, the following quantity of slag again.The 160mm2 square billet is rolled into Φ 5.5mm wire rod, through removing surface scale, wire drawing, copper plating treatment, make Φ 4mm welding wire, the chemical composition of welding wire (% by weight): C 0.05, Mn 1.65, Si 0.15, Mo 0.15, Ti 0.14, B 0.0009, Zr 0.003, Cu 0.20, S 0.003, P 0.014, surplus is iron and unavoidable impurities.
This welding wire cooperates submerged arc welding with solder flux SJ101, carries out the deposited metal performance test according to the test method of standard GB/T5293-1999 " used for submerged arc welding carbon steel welding wire and solder flux ", sweating heat input 24.9kJ/cm, and it is as shown in the table for the result.
The mechanical property of weld metal
Embodiment 2: according to embodiment 1 described method, make Φ 4.0mm, Φ 3.2mm welding wire, the chemical composition of welding wire (% by weight): C 0.09, Mn 1.80, Si 0.20, Mo 0.30, Ti 0.10, B 0.0025, Zr 0.006, Cu 0.25, S 0.004, P 0.009, surplus is iron and unavoidable impurities.
Mother metal is the thick X70 pipe line steel of 8.8mm, and solder flux is SJ101.Interior weldering monofilament technology, heat input 30KJ/cm, mariages technology has been adopted in outside weld, and heat is imported 45KJ/cm, and the mechanical property of postwelding joint sees Table.
With X70 pipe line steel weldment bear
Embodiment 3: according to embodiment 1 described method, make Φ 3.2mm welding wire, the chemical composition of welding wire (% by weight): C 0.07, Mn 1.60, Si 0.18, Mo 0.30, Ti 0.15, B 0.003, Zr 0.008, Cu 0.35, S 0.003, P 0.006, surplus is iron and unavoidable impurities.Carry out welding wire and low-carbon bainite bridge steel soldering test.The chemical composition and the mechanical property of mother metal see Table.
The chemical composition of bainite bridge steel mother metal
| C | Si | Mn | P | S | Cu | Cr | Ni | Mo | Ti | Nb |
| 0.047 | 0.40 | 1.63 | 0.008 | 0.004 | 0.40 | 0.32 | 0.34 | 0.12 | 0.012 | 0.04 |
The mechanical property of bainite bridge steel mother metal
| Finished product thickness mm | Rel N/mm2 | Rm N/mm2 | ReL.Rm | A％ | Clod wash d=3a | -20 ℃ of vertical Akv (J) |
| 60 | 550 | 710 | 0.77 | 19.5 | Close | 290，290，290 |
This welding wire cooperates with solder flux SJ101, adopts monofilament Lincoln weld having carried out low-carbon bainite bridge steel Lincoln weld test, is input as 45～50KJ/cm according to the thickness sweating heat of mother metal.Postwelding has carried out ultrasonic examination, and result of detection shows that welding quality reaches II level quality.Postwelding sample mechanical property is as table.
The foregoing description explanation, welding wire welding adaptability of the present invention is strong, and the weld metal excellent performance is suitable for the submerged arc welding of 500～700Mpa level low alloy high-strength steel and APIX60～X70 level pipeline steel plate.
Claims (1)
1, a kind of high-ductility submerged arc welding wire for pipeline steel, its chemical composition % by weight contains: C0.04～0.09, Mn1.4～1.9, Si0.1～0.2, Mo0.1～0.3, Ti0.07～0.15, B0.0005～0.003, Zr0.002～0.008, Cu≤0.35, S≤0.010, P≤0.012, surplus are Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNA2007103036397A CN101462207A (en) | 2007-12-21 | 2007-12-21 | High-ductility submerged arc welding wire for pipeline steel |
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| CNA2007103036397A CN101462207A (en) | 2007-12-21 | 2007-12-21 | High-ductility submerged arc welding wire for pipeline steel |
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| CN101462207A true CN101462207A (en) | 2009-06-24 |
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| CNA2007103036397A Pending CN101462207A (en) | 2007-12-21 | 2007-12-21 | High-ductility submerged arc welding wire for pipeline steel |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101906568A (en) * | 2010-08-12 | 2010-12-08 | 中国石油天然气集团公司 | High-grade large-strain pipeline steel and manufacturing method of steel pipe |
| CN101342645B (en) * | 2008-01-08 | 2011-04-27 | 宝鸡石油钢管有限责任公司 | High-strength high-ductility high-soldering-speed welding wire for submerged arc welding for high-level pipeline steel |
| CN102161139A (en) * | 2010-12-13 | 2011-08-24 | 首钢总公司 | Production method for manufacturing steel wire rod for X80 pipe line steel submerged arc welding wire |
| CN102240865A (en) * | 2011-06-28 | 2011-11-16 | 首钢总公司 | High-strength high-toughness submerged-arc welding wire for super-high-strength pipeline steel |
| CN102383049A (en) * | 2011-11-21 | 2012-03-21 | 中国石油集团渤海石油装备制造有限公司 | Method for manufacturing low-cost high-toughness X70 steel spiral submerged arc welded pipe |
| CN102528312A (en) * | 2012-02-15 | 2012-07-04 | 哈尔滨工业大学 | Solder for exothermal soldering of railway track joint, igniting agent and soldering method |
| CN104476009A (en) * | 2014-12-09 | 2015-04-01 | 江苏省沙钢钢铁研究院有限公司 | Submerged arc welding wire for low temperature pipeline K65 hot bending elbows |
| CN107009049A (en) * | 2017-05-24 | 2017-08-04 | 中国石油天然气集团公司 | One kind is applied to below L360/X52 low level pipe line steel submerged arc welding welding wires |
| CN108672981A (en) * | 2018-07-25 | 2018-10-19 | 武汉铁锚焊接材料股份有限公司 | A kind of increasing material manufacturing solid welding wire and its welding method |
| CN109454360A (en) * | 2018-09-17 | 2019-03-12 | 昆山中冶宝钢焊接材料有限公司 | A kind of SAW consumable material for double wire welding |
| CN112404671A (en) * | 2020-11-06 | 2021-02-26 | 李素坤 | Solid welding wire for FCB (flux cored arc welding) method high heat input submerged arc welding and preparation method and application thereof |
-
2007
- 2007-12-21 CN CNA2007103036397A patent/CN101462207A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101342645B (en) * | 2008-01-08 | 2011-04-27 | 宝鸡石油钢管有限责任公司 | High-strength high-ductility high-soldering-speed welding wire for submerged arc welding for high-level pipeline steel |
| CN101906568A (en) * | 2010-08-12 | 2010-12-08 | 中国石油天然气集团公司 | High-grade large-strain pipeline steel and manufacturing method of steel pipe |
| CN102161139A (en) * | 2010-12-13 | 2011-08-24 | 首钢总公司 | Production method for manufacturing steel wire rod for X80 pipe line steel submerged arc welding wire |
| CN102240865A (en) * | 2011-06-28 | 2011-11-16 | 首钢总公司 | High-strength high-toughness submerged-arc welding wire for super-high-strength pipeline steel |
| CN102383049A (en) * | 2011-11-21 | 2012-03-21 | 中国石油集团渤海石油装备制造有限公司 | Method for manufacturing low-cost high-toughness X70 steel spiral submerged arc welded pipe |
| CN102383049B (en) * | 2011-11-21 | 2014-03-05 | 中国石油集团渤海石油装备制造有限公司 | Method for manufacturing low-cost high-toughness X70 steel spiral submerged arc welded pipe |
| CN102528312A (en) * | 2012-02-15 | 2012-07-04 | 哈尔滨工业大学 | Solder for exothermal soldering of railway track joint, igniting agent and soldering method |
| CN104476009A (en) * | 2014-12-09 | 2015-04-01 | 江苏省沙钢钢铁研究院有限公司 | Submerged arc welding wire for low temperature pipeline K65 hot bending elbows |
| CN107009049A (en) * | 2017-05-24 | 2017-08-04 | 中国石油天然气集团公司 | One kind is applied to below L360/X52 low level pipe line steel submerged arc welding welding wires |
| CN108672981A (en) * | 2018-07-25 | 2018-10-19 | 武汉铁锚焊接材料股份有限公司 | A kind of increasing material manufacturing solid welding wire and its welding method |
| CN109454360A (en) * | 2018-09-17 | 2019-03-12 | 昆山中冶宝钢焊接材料有限公司 | A kind of SAW consumable material for double wire welding |
| CN112404671A (en) * | 2020-11-06 | 2021-02-26 | 李素坤 | Solid welding wire for FCB (flux cored arc welding) method high heat input submerged arc welding and preparation method and application thereof |
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Open date: 20090624 |