CN109514211A - A kind of production method of straight seam welded pipe - Google Patents

A kind of production method of straight seam welded pipe Download PDF

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Publication number
CN109514211A
CN109514211A CN201910073810.2A CN201910073810A CN109514211A CN 109514211 A CN109514211 A CN 109514211A CN 201910073810 A CN201910073810 A CN 201910073810A CN 109514211 A CN109514211 A CN 109514211A
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China
Prior art keywords
welded pipe
seam welded
straight seam
production method
socket
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Pending
Application number
CN201910073810.2A
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Chinese (zh)
Inventor
沈阳
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Jiangsu Ice Soluble Pipe Industry Co Ltd
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Jiangsu Ice Soluble Pipe Industry Co Ltd
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Priority to CN201910073810.2A priority Critical patent/CN109514211A/en
Publication of CN109514211A publication Critical patent/CN109514211A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron

Abstract

The present invention discloses a kind of production method of straight seam welded pipe, comprising the following steps: cuts steel plate by processing dimension requirement；Cutting section processed with edge milling machines flat and smooth, and processes welding groove；Arc-shaped is made in steel plate by prebending machine；Tubulose is made in the steel plate after pre-bending by molding machine；Close up its edge by linking machine upper and lower mould the opening socket of compression moulding, and carry out prewelding, to keep the shape of steel pipe；Inner wall welding is carried out to the socket of pre- postwelding；The socket of internal postwelding carries out outer wall welding；Integer aligning is carried out to steel pipe with finishing machine and straightener, obtains straight seam welded pipe.Harmful element content is lower than standard value in the chemical component of the straight seam welded pipe, and the intensity index of weld joint mechanical performance is in optimum state, and toughness index is higher than 3.5 times of standard；And it is depressed into the pressure of failure experiment outside beyond standard 41.9%.

Description

A kind of production method of straight seam welded pipe
Technical field
The present invention relates to the technical field of steel pipe, in particular to a kind of production method of straight seam welded pipe.
Background technique
Straight seam welded pipe welds manufactured steel pipe with hot rolling or cold-rolled steel sheet or steel coil strip and carries out straight seam welding on welding equipment Obtained pipe is all straight seam welded pipe.
Straight seam welded pipe simple production process, high production efficiency is at low cost, and development is very fast.But the weld seam of straight seam welded pipe The intensity of mechanical performance is low, it is led to problems such as to be easy to happen leakage when being applied to transport liquid.
Summary of the invention
The object of the present invention is to provide a kind of production method of straight seam welded pipe, one in above-mentioned prior art problem is solved Or it is multiple.
A kind of production method of straight seam welded pipe provided by the invention, comprising the following steps:
S1, blanking: steel plate is cut by processing dimension requirement；
S2: milling side: being processed cutting section with edge milling machines flat and smooth, and processes welding groove；
S3, pre-bending: steel plate is made by arc-shaped by prebending machine；
S4, molding: the steel plate after pre-bending is made by tubulose by molding machine；
S5, joint close prewelding: closing up its edge by linking machine upper and lower mould the opening socket of compression moulding, and carries out pre- Weldering, to keep the shape of steel pipe；
S6, interior weldering: inner wall welding is carried out to the socket of pre- postwelding；
S7, outside weld: the socket of internal postwelding carries out outer wall welding；
S8, full circle, aligning: integer aligning is carried out to steel pipe with finishing machine and straightener, obtains straight seam welded pipe.
In some embodiments, steel plate includes: by mass percentage
C:0.15%-0.21%；Si :≤0.35%；Mn :≤1.45%；P :≤0.02%；S :≤0.008%；Ti :≤ 0.018%；V :≤0.002%；Al :≤0.038%；Ni :≤0.13%；Nb :≤0.029%；Cu :≤0.135%；Cr :≤ 0.03%；Mo :≤0.008%；B :≤0.0005%；Ca :≤0.003%；Surplus is Fe and other inevitable impurity.
C: influence of the carbon content to welding performance is maximum.Carbon content is lower, and welding performance is better, can improve steel toughness and Hic resistance (hydrogen induced cracking (HIC)) performance, thus welding quality is better.With the increase of carbon content, element segregation and banded structure are easy It generates, their generation can be such that hardness increases, and welding performance reduces.
Si: silicon reduces the welding performance of steel, forms field trash in steel, keeps steel impure, to reduce welding quality.
Mn: manganese increases the intensity of steel, hardness, and welding performance reduces, and be easy to cause embrittlement.
P: phosphorus is harmful element, unfavorable to the welding performance of steel, and phosphorus is the main reason for causing blue shortness, and P content control exists 0.02% is sufficient for general welding requirements.
S: content height can be such that sulphide inculsion increases, and cause HIC and SSC (sulfide stress cracking (SSC)), be harmful in steel Element can be such that the welding performance of steel is significantly destroyed, the hot cracking of weld seam, generation stomata and loose phenomenon, and by In the reason of the S element.It needs S content to control below 0.01%.
In some embodiments, steel plate includes: by mass percentage
C:0.18%；Si:0.25%；Mn:1.00%；P:0.01%；S:0.005%；Ti:0.008%；V:0.001%； Al:0.008%；Ni:0.03%；Nb:0.019%；Cu:0.035%；Cr:0.02%；Mo:0.005%；B:0.0002%； Ca:0.001%；Surplus is Fe and other inevitable impurity.
In some embodiments, the caliber of straight seam welded pipe is 244.48-246.2mm.
In some embodiments, ovality≤1.2mm of straight seam welded pipe.
In some embodiments, the wall thickness of straight seam welded pipe is 8-9.4mm.
In some embodiments, inner wall welding step S6: is carried out using socket of the submerged welding process to pre- postwelding.
In some embodiments, outer wall welding rapid S7: is carried out using the socket of the internal postwelding of submerged welding process.
Beneficial effect:
Harmful element content is lower than standard value, weld joint mechanical in the chemical component of the straight seam welded pipe of the embodiment of the present invention The intensity index of energy is in optimum state, and toughness index is higher than 3.5 times of standard；And it is depressed into the pressure of failure experiment outside beyond standard 41.9%.
Specific embodiment
The present invention is described in more detail below by embodiment.
Case study on implementation 1:
A kind of production method of straight seam welded pipe, comprising the following steps:
S1, blanking: steel plate is cut by processing dimension requirement；
S2: milling side: being processed cutting section with edge milling machines flat and smooth, and processes welding groove；
S3, pre-bending: steel plate is made by arc-shaped by prebending machine；
S4, molding: the steel plate after pre-bending is made by tubulose by molding machine；
S5, joint close prewelding: closing up its edge by linking machine upper and lower mould the opening socket of compression moulding, and carries out pre- Weldering, to keep the shape of steel pipe；
S6, interior weldering: inner wall welding is carried out using socket of the submerged welding process to pre- postwelding；
S7, outside weld: outer wall welding is carried out using the socket of the internal postwelding of submerged welding process；
S8, full circle, aligning: integer aligning is carried out to steel pipe with finishing machine and straightener, obtains straight seam welded pipe.
Wherein, steel plate includes: by mass percentage
C:0.18%；Si:0.25%；Mn:1.00%；P:0.01%；S:0.005%；Ti:0.008%；V:0.001%； Al:0.008%；Ni:0.03%；Nb:0.019%；Cu:0.035%；Cr:0.02%；Mo:0.005%；B:0.0002%； Ca:0.001%；Surplus is Fe and other inevitable impurity.
Wherein, the caliber of straight seam welded pipe is 245mm；The ovality 1mm of straight seam welded pipe；The wall thickness of straight seam welded pipe is 9mm.
The straight seam welded pipe that the production method for the straight seam welded pipe that case study on implementation 1 obtains obtains is tested for the property, as a result such as Following table:
Table 1: performance test data summarizes
Harmful element content is lower than standard value, weld joint mechanical in the chemical component of the straight seam welded pipe of the embodiment of the present invention The intensity index of energy is in optimum state, and toughness index is higher than 3.5 times of standard；And it is depressed into the pressure of failure experiment outside beyond standard 41.9%.
The above statement is only preferred embodiment of the invention, it is noted that those skilled in the art, not Under the premise of being detached from the invention design, various modifications and improvements can be made, these also should be regarded as the protection model of invention Within enclosing.

Claims (8)

1. a kind of production method of straight seam welded pipe, which comprises the following steps:
S1, blanking: steel plate is cut by processing dimension requirement；
S2: milling side: being processed cutting section with edge milling machines flat and smooth, and processes welding groove；
S3, pre-bending: steel plate is made by arc-shaped by prebending machine；
S4, molding: the steel plate after pre-bending is made by tubulose by molding machine；
S5, joint close prewelding: closing up its edge by linking machine upper and lower mould the opening socket of compression moulding, and carry out prewelding, To keep the shape of steel pipe；
S6, interior weldering: inner wall welding is carried out to the socket of pre- postwelding；
S7, outside weld: the socket of internal postwelding carries out outer wall welding；
S8, full circle, aligning: integer aligning is carried out to steel pipe with finishing machine and straightener, obtains straight seam welded pipe.
2. a kind of production method of straight seam welded pipe according to claim 1, which is characterized in that the steel plate presses quality percentage Than including:
C:0.15%-0.21%；Si :≤0.35%；Mn :≤1.45%；P :≤0.02%；S :≤0.008%；Ti :≤ 0.018%；V :≤0.002%；Al :≤0.038%；Ni :≤0.13%；Nb :≤0.029%；Cu :≤0.135%；Cr :≤ 0.03%；Mo :≤0.008%；B :≤0.0005%；Ca :≤0.003%；Surplus is Fe and other inevitable impurity.
3. a kind of production method of straight seam welded pipe according to claim 1, which is characterized in that the steel plate presses quality percentage Than including:
C:0.18%；Si:0.25%；Mn:1.00%；P:0.01%；S:0.005%；Ti:0.008%；V:0.001%；Al: 0.008%；Ni:0.03%；Nb:0.019%；Cu:0.035%；Cr:0.02%；Mo:0.005%；B:0.0002%；Ca: 0.001%；Surplus is Fe and other inevitable impurity.
4. a kind of production method of straight seam welded pipe according to claim 1, which is characterized in that the caliber of the straight seam welded pipe For 244.48-246.2mm.
5. a kind of production method of straight seam welded pipe according to claim 1, which is characterized in that the ellipse of the straight seam welded pipe Degree≤1.2mm.
6. a kind of production method of straight seam welded pipe according to claim 1, which is characterized in that the wall thickness of the straight seam welded pipe For 8-9.4mm.
7. a kind of production method of straight seam welded pipe according to claim 1, which is characterized in that the step S6: using and bury Arc welding process carries out inner wall welding to the socket of pre- postwelding.
8. a kind of production method of straight seam welded pipe according to claim 1, which is characterized in that the rapid S7: using submerged arc The socket of the internal postwelding of Welding carries out outer wall welding.
CN201910073810.2A 2019-01-25 2019-01-25 A kind of production method of straight seam welded pipe Pending CN109514211A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110434560A (en) * 2019-08-19 2019-11-12 扬州吉星机械有限公司 A kind of abnormity welded tube process equipment and its processing technology

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Publication number Priority date Publication date Assignee Title
JP2005002385A (en) * 2003-06-10 2005-01-06 Sumitomo Metal Ind Ltd Steel tube having excellent formability and toughness, and its production method
CN101205596A (en) * 2007-12-10 2008-06-25 华北石油管理局第一机械厂 X120 pipeline steel submerged arc straight weld pipe and manufacture technique thereof
CN102248023A (en) * 2011-08-05 2011-11-23 中国石油集团渤海石油装备制造有限公司 Method for manufacturing X70 steel-level large deformation-resistant longitudinally submerged arc welding pipe
CN102310119A (en) * 2011-09-02 2012-01-11 中国石油集团渤海石油装备制造有限公司 Manufacturing method of X65 pipeline steel longitudinal submerged arc welded pipe for undersea use
CN102397941A (en) * 2011-11-14 2012-04-04 中国石油集团渤海石油装备制造有限公司 Manufacturing method for X90 pipeline steel longitudinal submerged arc welding pipe
CN103521549A (en) * 2013-10-07 2014-01-22 宝鸡石油钢管有限责任公司 Manufacturing method of X100 high-steel-grade large-opening-diameter thick-wall longitudinal submerged-arc welded pipe
CN103540867A (en) * 2013-10-07 2014-01-29 宝鸡石油钢管有限责任公司 X80-level straight seam submerged-arc welded pipe with hydrogen sulfide stress corrosion resistance as well as manufacturing method thereof
CN104451440A (en) * 2014-09-01 2015-03-25 宝鸡石油钢管有限责任公司 High-plasticity longitudinal submerged arc welding tube for X70 thick-wall deep-sea pipeline and manufacturing method of high-plasticity longitudinal submerged arc welding tube
CN104858536A (en) * 2015-06-05 2015-08-26 江苏德创制管有限公司 Method for producing large-diameter thick-wall longitudinal submerged arc welded pipe

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005002385A (en) * 2003-06-10 2005-01-06 Sumitomo Metal Ind Ltd Steel tube having excellent formability and toughness, and its production method
CN101205596A (en) * 2007-12-10 2008-06-25 华北石油管理局第一机械厂 X120 pipeline steel submerged arc straight weld pipe and manufacture technique thereof
CN102248023A (en) * 2011-08-05 2011-11-23 中国石油集团渤海石油装备制造有限公司 Method for manufacturing X70 steel-level large deformation-resistant longitudinally submerged arc welding pipe
CN102310119A (en) * 2011-09-02 2012-01-11 中国石油集团渤海石油装备制造有限公司 Manufacturing method of X65 pipeline steel longitudinal submerged arc welded pipe for undersea use
CN102397941A (en) * 2011-11-14 2012-04-04 中国石油集团渤海石油装备制造有限公司 Manufacturing method for X90 pipeline steel longitudinal submerged arc welding pipe
CN103521549A (en) * 2013-10-07 2014-01-22 宝鸡石油钢管有限责任公司 Manufacturing method of X100 high-steel-grade large-opening-diameter thick-wall longitudinal submerged-arc welded pipe
CN103540867A (en) * 2013-10-07 2014-01-29 宝鸡石油钢管有限责任公司 X80-level straight seam submerged-arc welded pipe with hydrogen sulfide stress corrosion resistance as well as manufacturing method thereof
CN104451440A (en) * 2014-09-01 2015-03-25 宝鸡石油钢管有限责任公司 High-plasticity longitudinal submerged arc welding tube for X70 thick-wall deep-sea pipeline and manufacturing method of high-plasticity longitudinal submerged arc welding tube
CN104858536A (en) * 2015-06-05 2015-08-26 江苏德创制管有限公司 Method for producing large-diameter thick-wall longitudinal submerged arc welded pipe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110434560A (en) * 2019-08-19 2019-11-12 扬州吉星机械有限公司 A kind of abnormity welded tube process equipment and its processing technology

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Application publication date: 20190326