CN104475935B - A kind of anti-CO2The Site Welding method of corroded pipeline steel - Google Patents

A kind of anti-CO2The Site Welding method of corroded pipeline steel Download PDF

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Publication number
CN104475935B
CN104475935B CN201410682803.XA CN201410682803A CN104475935B CN 104475935 B CN104475935 B CN 104475935B CN 201410682803 A CN201410682803 A CN 201410682803A CN 104475935 B CN104475935 B CN 104475935B
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welding
steel
corroded pipeline
pipeline steel
surplus
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CN104475935A (en
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李丽
尹雨群
张静
张显辉
赵晋斌
张苏强
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Nanjing Iron and Steel Co Ltd
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Nanjing Iron and Steel Co Ltd
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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
    • B23K9/00—Arc welding or cutting
    • B23K9/16—Arc welding or cutting making use of shielding gas
    • B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
    • 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
    • B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
    • B23K33/004—Filling of continuous seams
    • 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
    • B23K35/308—Fe as the principal constituent with Cr as next major constituent
    • B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
    • 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
    • B23K9/02—Seam welding; Backing means; Inserts
    • B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
    • B23K9/0282—Seam welding; Backing means; Inserts for curved planar seams for welding tube sections
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/10—Pipe-lines
    • 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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/02—Iron or ferrous alloys
    • B23K2103/04—Steel or steel alloys

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Arc Welding In General (AREA)

Abstract

The invention discloses a kind of anti-CO2The Site Welding method of corroded pipeline steel, selects the anti-CO of X65 level2Corrosion pipe line steel, steel plate thickness is 5-21mm, and is the combination docking of identical thickness of slab；Select 5Cr-Ni-Mo alloy system welding wire, gage of wire Φ 2.4mm, welding wire chemical constituent and percentage by weight be: C≤0.05%, Mn:0.2-1.0%, Si:0.10-0.60%, P≤0.015%, S≤0.010%, Cr:4.0-6.0%, Ni+Mo:0.2-2.2%, surplus is Fe and inevitable impurity；Adopt tungsten electrode noble gas protecting multi-pass welding, welding condition: welding current 100-180A, arc voltage 10-15V, shield gas flow rate 10-15L/min；Combined steel plate banjo fixing butt jointing is adopted multilamellar multiple tracks continuous sequence, till weld seam fills up；Present invention process welds anti-CO when not preheating and not carrying out post weld heat treatment2Corroded pipeline steel, the mechanical property of welding point reaches X65 pipe line steel mechanical property level, and welding point has good anti-CO simultaneously2Corrosive nature so that anti-CO2Corroded pipeline steel Site Welding execution conditions improve, and production cost reduces.

Description

A kind of anti-CO2The Site Welding method of corroded pipeline steel
Technical field
The invention belongs to ferrous materials welding technology field, relate to a kind of anti-CO2The Site Welding method of corroded pipeline steel.
Background technology
Along with developing rapidly of industrial gas oil, CO2The etching problem of oil, gas pipeline is become a subject matter of oil and gas exploitation, conveying.Control CO2The method of corrosion mainly has three kinds: add corrosion inhibiter, uses anticorrosion undercoating and uses corrosion resistant alloy steel, and wherein the most safely and effectively safeguard procedures are use corrosion resistant alloy steel.In recent years, the development of this type of steel is also increased by various countries gradually, and main with low Cr steel steel, and it is main for coordinating the elements such as Cu, Ni, Mo, achieves relatively quantum jump in engineer applied.Being characterized in that of this type of steel not only has good anti-CO2Corrosive power (is about 3-4 times of ordinary carbon steel), and mechanical performance and weldability also can meet requirement of engineering, and price is far below the price of the like products such as rustless steel, therefore quickly grows.But the solder technology slower development of such steel, at present for the anti-CO of X65 level2Corroded pipeline steel, market does not still have the welding technique of maturation；Additionally, according to ASMEVIII, BS3351 code, before the weldering of 10mm thickness 5Cr-0.5Mo heat resisting steel, minimum preheating temperature should more than 150 DEG C, and postwelding must carry out the post weld heat treatment of about 700 DEG C, guarantee welding quality.No matter weld preheating or post weld heat treatment all add the difficulty of Site Welding, also increase construction cost.Relatively falling behind of solder technology greatly hinders the anti-CO of 5Cr system2Corrosion steel application.
Summary of the invention
The technical problem to be solved is, the shortcoming overcoming prior art, it is provided that a kind of anti-CO2The Site Welding method of corroded pipeline steel, the present invention adopts gas tungsten arc welding, and protective gas is 100%Ar, adopts the 5Cr-Ni-Mo alloy system welding wire of Φ 2.4mm simultaneously, welds anti-CO when not preheating and not carrying out post weld heat treatment2Corroded pipeline steel, the mechanical property of welding point reaches X65 pipe line steel mechanical property level, and welding point has good anti-CO simultaneously2Corrosive nature so that anti-CO2Corroded pipeline steel Site Welding execution conditions improve, and production cost reduces.
In order to solve above technical problem, the present invention provides a kind of anti-CO2The Site Welding method of corroded pipeline steel, comprises the following specific steps that:
(1) the anti-CO of X65 level is selected2Corrosion pipe line steel, steel plate thickness is 5-21mm, and is the combination docking of identical thickness of slab；Select 5Cr-Ni-Mo alloy system welding wire, gage of wire Φ 2.4mm, welding wire chemical constituent and percentage by weight be: C≤0.05%, Mn:0.2-1.0%, Si:0.10-0.60%, P≤0.015%, S≤0.010%, Cr:4.0-6.0%, Ni+Mo:0.2-2.2%, surplus is Fe and inevitable impurity；
(2) adopting tungsten electrode noble gas protecting multi-pass welding, protective gas is Ar, its purity > 99.9%；Groove adopts one side double V-groove, and bevel angle is 60 °, and groove gap is 0-1mm, and root face is 0-0.5mm；
(3) when ambient temperature >=5 °, need not preheating, weld continuously before welding, thermal weld stress amount controls at 6-18KJ/cm, and postwelding is made without heat treatment；Welding condition: welding current 100-180A, arc voltage 10-15V, shield gas flow rate 10-15L/min；；Combined steel plate banjo fixing butt jointing is adopted multilamellar multiple tracks continuous sequence, till weld seam fills up.
The technical scheme that the present invention limits further is:
Preferably, in step (1), welding wire chemical constituent and percentage by weight are: C:0.05%, Mn:0.2%, Si:0.10%, P:0.015%, S:0.010%, Cr:4.0%, Ni+Mo:0.2%, and surplus is Fe and inevitable impurity.
Preferably, in step (1), welding wire chemical constituent and percentage by weight are: C:0.01%, Mn:1.0%, Si:0.60%, P:0.005%, S:0.005%, Cr:6.0%, Ni+Mo:2.2%, and surplus is Fe and inevitable impurity.
Preferably, in step (1), welding wire chemical constituent and percentage by weight are: C:0.03%, Mn:0.6%, Si:0.30%, P:0.010%, S:0.008%, Cr:5.0%, Ni+Mo:1.2%, and surplus is Fe and inevitable impurity.
The invention has the beneficial effects as follows:
Present invention process adopts gas tungsten arc welding, and protective gas is 100%Ar, adopts the 5Cr-Ni-Mo alloy system welding wire of Φ 2.4mm simultaneously, welds anti-CO when not preheating and not carrying out post weld heat treatment2Corroded pipeline steel, the mechanical property of welding point reaches X65 pipe line steel mechanical property level, and welding point has good anti-CO simultaneously2Corrosive nature so that anti-CO2Corroded pipeline steel Site Welding execution conditions improve.
This technique is few to welding wire alloying element scaling loss, can be effectively ensured each alloying element content in weld seam, and easily realize single face welding and double face shaping, be easier to realize all-position welding, be particularly suitable for pipeline in-site installation；Welding joint mechanical property meets the anti-CO of X65 level simultaneously2The mechanical property requirements of corroded pipeline steel: Rm >=550MPa, bending property (face is curved, carry on the back curved) D=6a, 180 ° qualified, impact flexibility KV2 (-20 DEG C) >=47J of Seam and heat effected zone；Welding point has good anti-CO2Corrosivity ability, welding point CO2Corrosion testing evaluation display weld metal, fusion area, heat affected area and mother metal region occur without obvious etch pit, amplify 250 times of border coherent surface invariably observed between weld seam and underlying metal, and do not preheat before welding, postwelding is without heat treatment, improve production efficiency, saved one-tenth and produced cost.
Accompanying drawing explanation
Fig. 1 is the weld seam schematic diagram of embodiment 1；
Fig. 2 is the weld seam schematic diagram of embodiment 2；
Fig. 3 is the weld seam schematic diagram of embodiment 3.
Detailed description of the invention
Embodiment 1
The present embodiment provides a kind of anti-CO2The Site Welding method of corroded pipeline steel, as it is shown in figure 1, comprise the following specific steps that:
(1) the anti-CO of X65 level is selected2Corrosion pipe line steel, steel plate thickness is 5mm, and test plate (panel) is of a size of 450mm × 400mm × 5mm, and is the combination docking of identical thickness of slab；Selecting 5Cr-Ni-Mo alloy system welding wire, gage of wire Φ 2.4mm, welding wire chemical constituent and percentage by weight be: C:0.05%, Mn:0.2%, Si:0.10%, P:0.015%, S:0.010%, Cr:4.0%, Ni+Mo:0.2%, surplus is Fe and inevitable impurity；
(2) adopting tungsten electrode noble gas protecting multi-pass welding, protective gas is Ar, its purity > 99.9%；Groove adopts one side double V-groove, and bevel angle is 60 °, and groove gap is 0.3mm, and root face is 0mm；
(3) when ambient temperature >=5 °, need not preheating, weld continuously before welding, thermal weld stress amount controls at 6KJ/cm, and postwelding is made without heat treatment；Welding condition: welding current 100A, arc voltage 10V, shield gas flow rate 10L/min；The joint of 5mm+5mm combined steel plate is adopted multilamellar multiple tracks continuous sequence, till weld seam fills up.
Embodiment 2
The present embodiment provides a kind of anti-CO2The Site Welding method of corroded pipeline steel, as in figure 2 it is shown, comprise the following specific steps that:
(1) the anti-CO of X65 level is selected2Corrosion pipe line steel, steel plate thickness is 12mm, and test plate (panel) is of a size of 450mm × 400mm × 12mm, and is the combination docking of identical thickness of slab；Selecting 5Cr-Ni-Mo alloy system welding wire, gage of wire Φ 2.4mm, welding wire chemical constituent and percentage by weight be: C:0.01%, Mn:1.0%, Si:0.60%, P:0.005%, S:0.005%, Cr:6.0%, Ni+Mo:2.2%, surplus is Fe and inevitable impurity；
(2) adopting tungsten electrode noble gas protecting multi-pass welding, protective gas is Ar, its purity > 99.9%；Groove adopts one side double V-groove, and bevel angle is 60 °, and groove gap is 0.8mm, and root face is 0.5mm；
(3) when ambient temperature >=5 °, need not preheating, weld continuously before welding, thermal weld stress amount controls at 12KJ/cm, and postwelding is made without heat treatment；Welding condition: welding current 130A, arc voltage 12V, shield gas flow rate 12L/min；The joint of 12mm+12mm combined steel plate is adopted multilamellar multiple tracks continuous sequence, till weld seam fills up.
Embodiment 3
The present embodiment provides a kind of anti-CO2The Site Welding method of corroded pipeline steel, as it is shown on figure 3, comprise the following specific steps that:
(1) the anti-CO of X65 level is selected2Corrosion pipe line steel, steel plate thickness is 21mm, 450mm × 400mm × 21mm, and is the combination docking of identical thickness of slab；Selecting 5Cr-Ni-Mo alloy system welding wire, gage of wire Φ 2.4mm, welding wire chemical constituent and percentage by weight be: C:0.03%, Mn:0.6%, Si:0.30%, P:0.010%, S:0.008%, Cr:5.0%, Ni+Mo:1.2%, surplus is Fe and inevitable impurity；
(2) adopting tungsten electrode noble gas protecting multi-pass welding, protective gas is Ar, its purity > 99.9%；Groove adopts one side double V-groove, and bevel angle is 60 °, and groove gap is 1mm, and root face is 1mm；
(3) when ambient temperature >=5 °, need not preheating, weld continuously before welding, thermal weld stress amount controls at 18KJ/cm, and postwelding is made without heat treatment；Welding condition: welding current 180A, arc voltage 15V, shield gas flow rate 15L/min；The joint of 21mm+21mm combined steel plate is adopted multilamellar multiple tracks continuous sequence, till weld seam fills up.
To the anti-CO of X65 level adopting above-mentioned welding method to weld in embodiment 1-32Corroded pipeline steel banjo fixing butt jointing carries out mechanics properties testing, and testing result is in Table 1.
Above example is only the technological thought that the present invention is described, it is impossible to limits protection scope of the present invention, every technological thought proposed according to the present invention, any change done on technical scheme basis with this, each falls within scope.

Claims (4)

1. an anti-CO2The Site Welding method of corroded pipeline steel, it is characterised in that comprise the following specific steps that:
(1) the anti-CO of X65 level is selected2Corrosion pipe line steel, steel plate thickness is 5-21mm, and is the combination docking of identical thickness of slab；Select 5Cr-Ni-Mo alloy system welding wire, gage of wire Φ 2.4mm, described welding wire chemical constituent and percentage by weight be: C≤0.05%, Mn:0.2-1.0%, Si:0.10-0.60%, P≤0.015%, S≤0.010%, Cr:4.0-6.0%, Ni+Mo:0.2-2.2%, surplus is Fe and inevitable impurity；
(2) adopting tungsten electrode noble gas protecting multi-pass welding, protective gas is Ar, its purity > 99.9%；Groove adopts one side double V-groove, and bevel angle is 60 °, and groove gap is 0-1mm, and root face is 0-0.5mm；
(3) when ambient temperature >=5 °, need not preheating, weld continuously before welding, thermal weld stress amount controls at 6-18KJ/cm, and postwelding is made without heat treatment；Welding condition: welding current 100-180A, arc voltage 10-15V, shield gas flow rate 10-15L/min；Combined steel plate banjo fixing butt jointing is adopted multilamellar multiple tracks continuous sequence, till weld seam fills up.
2. anti-CO according to claim 12The Site Welding method of corroded pipeline steel, it is characterized in that, in described step (1), welding wire chemical constituent and percentage by weight are: C:0.05%, Mn:0.2%, Si:0.10%, P:0.015%, S:0.010%, Cr:4.0%, Ni+Mo:0.2%, surplus is Fe and inevitable impurity.
3. anti-CO according to claim 12The Site Welding method of corroded pipeline steel, it is characterized in that, in described step (1), welding wire chemical constituent and percentage by weight are: C:0.01%, Mn:1.0%, Si:0.60%, P:0.005%, S:0.005%, Cr:6.0%, Ni+Mo:2.2%, surplus is Fe and inevitable impurity.
4. anti-CO according to claim 12The Site Welding method of corroded pipeline steel, it is characterized in that, in described step (1), welding wire chemical constituent and percentage by weight are: C:0.03%, Mn:0.6%, Si:0.30%, P:0.010%, S:0.008%, Cr:5.0%, Ni+Mo:1.2%, surplus is Fe and inevitable impurity.
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Publication number Priority date Publication date Assignee Title
CN105149788B (en) * 2015-07-28 2017-01-18 北京工业大学 Laser welding method for ceramic-lined composite steel pipe
CN106695166A (en) * 2015-11-12 2017-05-24 海宁瑞奥金属科技有限公司 Gas shielded welding wire for ultra-high-strength corrosion-resistant pipelines

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JP4319886B2 (en) * 2003-10-22 2009-08-26 新日本製鐵株式会社 Large heat input butt weld joint with brittle fracture resistance
CN101362263B (en) * 2008-09-19 2011-09-14 四川大西洋焊接材料股份有限公司 Electric welding rod for gas shielded welding X80 grade steel oil, gas transmission pipe
CN101733580B (en) * 2008-11-18 2013-08-28 山东索力得焊材有限公司 800MPa-grade high-strength high-tenacity gas shielded welding wire
JP5521632B2 (en) * 2009-02-25 2014-06-18 Ｊｆｅスチール株式会社 Thick steel plate welding method
CN102218621B (en) * 2011-05-26 2014-12-03 四川大西洋焊接材料股份有限公司 Gas shielded welding wire used for X100 pipeline steel
CN102380694B (en) * 2011-09-15 2013-07-24 南京钢铁股份有限公司 Welding process for longitudinal weld joints of submerged-arc welding for high-strength pipeline steel
CN102500950B (en) * 2011-10-09 2014-02-19 四川大西洋焊接材料股份有限公司 Welding electrode for welding X65-grade pipeline steel
CN102848048B (en) * 2012-09-07 2015-11-25 龙口中集来福士海洋工程有限公司 Pipeline welding method
CN103121148B (en) * 2012-10-23 2016-07-13 中国石油天然气集团公司 For welding welding material and the welding procedure of X100 level pipe line steel
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