CN102380694A - Welding process for longitudinal weld joints of submerged-arc welding for high-strength pipeline steel - Google Patents
Welding process for longitudinal weld joints of submerged-arc welding for high-strength pipeline steel Download PDFInfo
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Abstract
The invention belongs to the technical field of welding of high-strength pipeline steel, and relates to a welding process for longitudinal weld joints of submerged-arc welding for high-strength pipeline steel. Chemical components of high-strength pipeline steel comprise 0.04%-0.06% of C, 0.08%-0.10% of Si, 1.2%-2.0% of Mn, 0.09%-0.10% of Nb+V+Ti+Zr, 0.2%-0.4% of Mo, 0.8%-1.2% of Ni+Cr+Cu, P equal to or less than 0.004%, S equal to or less than 0.001% and the balance being Fe. Steel comprises carbon equivalent Ceq equal to or less than 0.53% and Pcm equal to or less than 0.22%. Chemical components of welding wires comprise 0.08% of C, 1.75% of Mn, 0.80% of Si, 0.003% of S, 0.010% of P, 0.138% of Cu, 0.41% of Cr, 0.53% of Mo, 2.22% of Ni, 0.011% of Al, 0.05% of Ti, 0.015% of V, 0,01% of Zr, and the balance being Fe. An X-shaped groove is utilized for the submerged-arc welding, the angle of the groove is 90 degrees, the truncated edge is 4.8mm, the heat input in welding is 21kj/cm, the welding current ranges from 450-800A, the arc voltage ranges from 32V to 38V, and the welding speed is 170cm/min. Preheating before welding, heat treatment after welding, interlayer temperature control are all eliminated, weld joints have excellent comprehensive performances, and various areas of the weld joints have fine impact ductility reserve and safety allowance.
Description
Technical field
The invention belongs to the high-strength line-pipe steel welding technology field, a kind of specifically welding procedure of high tensile pipeline steel submerged-arc welding longitudinal seam relates to a kind of welding procedure of high tensile pipeline steel X120 submerged-arc welding longitudinal seam.
Background technology
Be used to transport the pipe line steel of petroleum gas; The X65 that comes into operation since the seventies in last century, the eighties, the X70 steel was introduced into engineering construction, produced the X80 steel pipe end of the nineties; Until X100 and the X120 steel developed at present, its intensity develops into more than the 1000MPa gradually.Use high-strength and the strong pipe line steel of superelevation not only can reduce the cost of building High Pressure Gas Transmitting Pipeline; And can improve the efficient of transport gas; Saving operating cost, is the requirement and the trend of current and following pipe line steel development, and this just requires senior pipe line steel to have good welding performance.
The development report of superhigh intensity pipe line steel X100/X120 appearred later in China from 2005; In October, 2006; Baosteel is successfully manufactured experimently out superhigh intensity X120 pipeline steel plate on new 5000mm wide and heavy plate mill of going into operation, still be in the three-way backbone of transfering natural gas from the west to the east of design phase at present and plan to build the test section of establishing X100/X120 level pipe line steel.For the welding of present high-strength line-pipe steel X120, also do not have one can be for reference welding procedure.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the shortcoming of prior art, proposes a kind of welding procedure of high tensile pipeline steel submerged-arc welding longitudinal seam; Preheating before the solderless; Interlayer temperature is not controlled in no post weld heat treatment, and welding point has excellent comprehensive performances and good impact flexibility deposit.
The technical scheme that the present invention solves above technical problem is:
A kind of welding procedure of high tensile pipeline steel submerged-arc welding longitudinal seam, ⑴ high tensile pipeline steel chemical constituent and percentage by weight are: C:0.04-0.06%, Si:0.08-0.10%; Mn:1.2-2.0%, Nb+V+Ti+Zr:0.09-0.10%, Mo:0.2-0.4%; Ni+Cr+Cu:0.8-1.2%; P≤0.004%, S≤0.001%, surplus is Fe and unavoidable impurities; The carbon equivalent Ceq of steel≤0.53%, Pcm≤0.22%;
⑵ used welding wire chemical constituent and percentage by weight are: C:0.08%, Mn:1.75%, Si:0.80%, S:0.003%; P:0.010%, Cu:0.138%, Cr:0.41%, Mo:0.53%; Ni:2.22%, Al:0.011%, Ti:0.05%; V:0.015, < 0.01%, surplus is Fe and unavoidable impurities to Zr;
⑶ X type groove is adopted in submerged-arc welding, and bevel angle is 90 °, root face 4.8mm, welding under room temperature environment; Without preheating is not controlled interlayer temperature, and the sweating heat input quantity is 21 kJ/cm, welding current 450-800A; Arc voltage 32-38V, speed of welding 170cm/min, sweating heat input quantity 21kJ/cm.
The technical scheme that the present invention further limits is:
The welding procedure of aforesaid high tensile pipeline steel submerged-arc welding longitudinal seam, gage of wire is 4mm, the solder flux trade mark of selecting for use is OK Flux 10.62.
The welding procedure of aforesaid high tensile pipeline steel submerged-arc welding longitudinal seam, the solder flux system of curing are 350 ℃ * 2h.
The welding procedure of aforesaid high tensile pipeline steel submerged-arc welding longitudinal seam is that the vertical weldering of 12.7mm+12.7mm combined steel pipe submerged-arc welding banjo fixing butt jointing adopts inside and outside three submerged-arc weldings, one-shot forming to thickness.
The setting of welding pre-heating temperature and interlayer temperature:, carrying out having considered its welding performance when senior pipe line steel designs in order to satisfy the requirement of pipe line steel actual field welding efficiency.Usually weigh its welding performance with carbon equivalent parameters C eq, Pcm.There is carbon equivalent value preferably the high-grade pipe line steel capital, when welding procedure is suitable, can avoid producing bigger weld defect, satisfies relevant performance indications requirement.Therefore do not carry out preheating and do not control interlayer temperature, do not find that there is weld defect in it yet, welding point is carried out microexamination do not find microscopic defect yet.
The setting of welding material: when selecting welding material for use; What at first consider is the intensity and-30 ℃ of impact flexibility and base material coupling of weld metal; Welding wire of the present invention is joined sintered flux OK Flux 10.62; The weld metal high purity that forms, and seam organization is main with tiny acicular ferrite, obdurability has concurrently; The welding wire for submerged-arc welding of selecting for use is joined the mechanical property of solder flux OK Flux 10.62 deposited metals: tensile strength Rm >=940MPa, yield strength Rp0.2 >=890MPa, percentage elongation A >=15% ,-40 ℃ of ballistic work AKv >=47J.
The setting of sweating heat input quantity: will influence the Thermal Cycle process because the sweating heat input quantity changes, will bring influence to the tissue and the mechanical property of welding joint welding metal and heat affected area thus.Through welding wire of the present invention, when weld heat input was input as 21 kJ/cm, each item performance of welding point heat affected area all can satisfy its performance indications requirement.
The invention has the beneficial effects as follows: the present invention can solve welding technique of submerged arc welding and matching materials problem; Preheating before the solderless; Interlayer temperature is not controlled in no post weld heat treatment, adopts the inventive method welding X120 pipe steel; Welding point has excellent comprehensive performances, and each zone of welding point has good impact flexibility deposit and the rich degree of safety.The present invention has realized the butt joint of the vertical weldering of pipeline steel X120 steel pipe; Adopt three submerged arc technology welding, the joint surface moulding is good, has good comprehensive mechanical property; Weld seam and welding heat affected zone have good impact flexibility, can satisfy the performance indications requirement of X120 level pipeline pipeline steel.
The specific embodiment
Embodiment 1
Present embodiment is a kind of welding procedure of high tensile pipeline steel submerged-arc welding longitudinal seam, and ⑴ high tensile pipeline steel chemical constituent and percentage by weight are: C:0.04%, Si:0.08%; Mn:1.90%, Nb+V+Ti+Zr:0.09%, Mo:0.2%; Ni+Cr+Cu:0.8%; P:0.004%, S:0.001%, surplus is Fe and unavoidable impurities; The carbon equivalent Ceq:0.53% of steel, Pcm:0.22%;
⑵ used welding wire chemical constituent and percentage by weight are: C:0.08%, Mn:1.75%, Si:0.80%, S:0.003%; P:0.010%, Cu:0.138%, Cr:0.41%, Mo:0.53%; Ni:2.22%, Al:0.011%, Ti:0.05%; V:0.015, < 0.01%, surplus is Fe and unavoidable impurities to Zr; Gage of wire is 4mm, and the solder flux trade mark of selecting for use is OK Flux 10.62; The solder flux system of curing is 350 ℃ * 2h;
⑶ X type groove is adopted in submerged-arc welding, and bevel angle is 90 °, root face 4.8mm, welding under room temperature environment; Without preheating is not controlled interlayer temperature, and the sweating heat input quantity is 21 kJ/cm, welding current 450A; Arc voltage 32V, speed of welding 170cm/min, sweating heat input quantity 21kJ/cm.
To thickness is that the vertical weldering of 12.7mm+12.7mm combined steel pipe submerged-arc welding banjo fixing butt jointing adopts inside and outside three submerged-arc weldings, one-shot forming.
Embodiment 2
Present embodiment is a kind of welding procedure of high tensile pipeline steel submerged-arc welding longitudinal seam, and ⑴ high tensile pipeline steel chemical constituent and percentage by weight are: C:0.05%, Si:0.09%; Mn:1.80%, Nb+V+Ti+Zr:0.095%, Mo:0.3%; Ni+Cr+Cu:1.0%; P:0.003%, S:0.0009%, surplus is Fe and unavoidable impurities; The carbon equivalent Ceq:0.50% of steel, Pcm:0.21%;
⑵ used welding wire chemical constituent and percentage by weight are: C:0.08%, Mn:1.75%, Si:0.80%, S:0.003%; P:0.010%, Cu:0.138%, Cr:0.41%, Mo:0.53%; Ni:2.22%, Al:0.011%, Ti:0.05%; V:0.015, < 0.01%, surplus is Fe and unavoidable impurities to Zr; Gage of wire is 4mm, and the solder flux trade mark of selecting for use is OK Flux 10.62; The solder flux system of curing is 350 ℃ * 2h;
⑶ X type groove is adopted in submerged-arc welding, and bevel angle is 90 °, root face 4.8mm, welding under room temperature environment; Without preheating is not controlled interlayer temperature, and the sweating heat input quantity is 21 kJ/cm, welding current 600A; Arc voltage 35V, speed of welding 170cm/min, sweating heat input quantity 21kJ/cm.
To thickness is that the vertical weldering of 12.7mm+12.7mm combined steel pipe submerged-arc welding banjo fixing butt jointing adopts inside and outside three submerged-arc weldings, one-shot forming.
Embodiment 3
Present embodiment is a kind of welding procedure of high tensile pipeline steel submerged-arc welding longitudinal seam, and ⑴ high tensile pipeline steel chemical constituent and percentage by weight are: C:0.06%, Si:0.10%; Mn:1.60%, Nb+V+Ti+Zr:0.10%, Mo:0.4%; Ni+Cr+Cu:1.2%; P:0.002%, S:0.0005%, surplus is Fe and unavoidable impurities; The carbon equivalent Ceq:0.51% of steel, Pcm:0.21%;
⑵ used welding wire chemical constituent and percentage by weight are: C:0.08%, Mn:1.75%, Si:0.80%, S:0.003%; P:0.010%, Cu:0.138%, Cr:0.41%, Mo:0.53%; Ni:2.22%, Al:0.011%, Ti:0.05%; V:0.015, < 0.01%, surplus is Fe and unavoidable impurities to Zr; Gage of wire is 4mm, and the solder flux trade mark of selecting for use is OK Flux 10.62; The solder flux system of curing is 350 ℃ * 2h;
⑶ X type groove is adopted in submerged-arc welding, and bevel angle is 90 °, root face 4.8mm, welding under room temperature environment; Without preheating is not controlled interlayer temperature, and the sweating heat input quantity is 21 kJ/cm, welding current 800A; Arc voltage 38V, speed of welding 170cm/min, sweating heat input quantity 21kJ/cm.
To thickness is that the vertical weldering of 12.7mm+12.7mm combined steel pipe submerged-arc welding banjo fixing butt jointing adopts inside and outside three submerged-arc weldings, one-shot forming.
The impact ductility test result such as the following table of the welding point of embodiment:
Table 1
Can know that by table 1 through adopting welding procedure of the present invention, each zone of welding X120 steel plate welding point has good impact flexibility deposit and the rich degree of safety.
Except that the foregoing description, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (4)
1. the welding procedure of a high tensile pipeline steel submerged-arc welding longitudinal seam is characterized in that:
⑴ said high tensile pipeline steel chemical constituent and percentage by weight are: C:0.04-0.06%, Si:0.08-0.10%, Mn:1.2-2.0%; Nb+V+Ti+Zr:0.09-0.10%; Mo:0.2-0.4%, Ni+Cr+Cu:0.8-1.2%, P≤0.004%; S≤0.001%, surplus are Fe and unavoidable impurities; The carbon equivalent Ceq of steel≤0.53%, Pcm≤0.22%;
⑵ used welding wire chemical constituent and percentage by weight are: C:0.08%, Mn:1.75%, Si:0.80%, S:0.003%; P:0.010%, Cu:0.138%, Cr:0.41%, Mo:0.53%; Ni:2.22%, Al:0.011%, Ti:0.05%; V:0.015, < 0.01%, surplus is Fe and unavoidable impurities to Zr;
⑶ X type groove is adopted in submerged-arc welding, and bevel angle is 90 °, root face 4.8mm, welding under room temperature environment; Without preheating is not controlled interlayer temperature, and the sweating heat input quantity is 21 kJ/cm, welding current 450-800A; Arc voltage 32-38V, speed of welding 170cm/min, sweating heat input quantity 21kJ/cm.
2. the welding procedure of high tensile pipeline steel submerged-arc welding longitudinal seam as claimed in claim 1 is characterized in that: said gage of wire is 4mm, and the solder flux trade mark of selecting for use is OK Flux 10.62.
3. the welding procedure of high tensile pipeline steel submerged-arc welding longitudinal seam as claimed in claim 2 is characterized in that: the said solder flux system of curing is 350 ℃ * 2h.
4. the welding procedure of high tensile pipeline steel submerged-arc welding longitudinal seam as claimed in claim 1 is characterized in that: to thickness is that the vertical weldering of 12.7mm+12.7mm combined steel pipe submerged-arc welding banjo fixing butt jointing adopts inside and outside three submerged-arc weldings, one-shot forming.
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Cited By (9)
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| CN103056496A (en) * | 2012-12-28 | 2013-04-24 | 胜利油田龙玺石油钢管有限公司 | Combined wire automatic submerged arc welding technology |
| CN103433603A (en) * | 2013-07-24 | 2013-12-11 | 武汉一冶钢结构有限责任公司 | Equal-strength matching submerged arc welding method for strong-strength P690QL1 steel |
| CN104475935A (en) * | 2014-11-24 | 2015-04-01 | 南京钢铁股份有限公司 | Field welding method for CO2-corrosion-resistant pipeline steel |
| CN105234590A (en) * | 2015-11-18 | 2016-01-13 | 四川大西洋焊接材料股份有限公司 | SA-508Gr.3Cl.2 steel submerged arc welding agent for nuclear power engineering and special welding wire |
| CN109604863A (en) * | 2019-01-14 | 2019-04-12 | 上海连山金属材料有限公司 | A kind of high tough gas protecting welding wire |
| CN110788456A (en) * | 2019-10-24 | 2020-02-14 | 番禺珠江钢管（珠海）有限公司 | Multi-wire submerged arc welding process with low weld seam surplus height for thin-wall steel pipe |
| CN111001907A (en) * | 2019-12-05 | 2020-04-14 | 渤海造船厂集团有限公司 | Welding wire for ultra-low carbon martensite high-strength and high-toughness gas metal arc welding |
| CN111015016A (en) * | 2019-12-05 | 2020-04-17 | 渤海造船厂集团有限公司 | Welding wire for ultra-low carbon martensite non-consumable electrode gas shielded welding |
| CN112372118A (en) * | 2020-12-09 | 2021-02-19 | 南京钢铁股份有限公司 | Submerged arc welding method for low-Mo refractory steel |
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Cited By (11)
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| CN103056496A (en) * | 2012-12-28 | 2013-04-24 | 胜利油田龙玺石油钢管有限公司 | Combined wire automatic submerged arc welding technology |
| CN103433603A (en) * | 2013-07-24 | 2013-12-11 | 武汉一冶钢结构有限责任公司 | Equal-strength matching submerged arc welding method for strong-strength P690QL1 steel |
| CN103433603B (en) * | 2013-07-24 | 2015-10-28 | 武汉一冶钢结构有限责任公司 | The grade of P690QL1 high strength steel mates buried arc welding method by force |
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| CN105234590A (en) * | 2015-11-18 | 2016-01-13 | 四川大西洋焊接材料股份有限公司 | SA-508Gr.3Cl.2 steel submerged arc welding agent for nuclear power engineering and special welding wire |
| CN109604863A (en) * | 2019-01-14 | 2019-04-12 | 上海连山金属材料有限公司 | A kind of high tough gas protecting welding wire |
| CN110788456A (en) * | 2019-10-24 | 2020-02-14 | 番禺珠江钢管（珠海）有限公司 | Multi-wire submerged arc welding process with low weld seam surplus height for thin-wall steel pipe |
| CN111001907A (en) * | 2019-12-05 | 2020-04-14 | 渤海造船厂集团有限公司 | Welding wire for ultra-low carbon martensite high-strength and high-toughness gas metal arc welding |
| CN111015016A (en) * | 2019-12-05 | 2020-04-17 | 渤海造船厂集团有限公司 | Welding wire for ultra-low carbon martensite non-consumable electrode gas shielded welding |
| CN112372118A (en) * | 2020-12-09 | 2021-02-19 | 南京钢铁股份有限公司 | Submerged arc welding method for low-Mo refractory steel |
| CN112372118B (en) * | 2020-12-09 | 2022-03-01 | 南京钢铁股份有限公司 | Submerged arc welding method for low-Mo refractory steel |
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