CN102267038A - Method for manufacturing steel pipe made of high-strength steel - Google Patents

Method for manufacturing steel pipe made of high-strength steel Download PDF

Info

Publication number
CN102267038A
CN102267038A CN2010101893157A CN201010189315A CN102267038A CN 102267038 A CN102267038 A CN 102267038A CN 2010101893157 A CN2010101893157 A CN 2010101893157A CN 201010189315 A CN201010189315 A CN 201010189315A CN 102267038 A CN102267038 A CN 102267038A
Authority
CN
China
Prior art keywords
steel pipe
steel
pipe
bending
plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2010101893157A
Other languages
Chinese (zh)
Inventor
周志吉
李友胜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANGHAI YUEYUECHAO STEEL TUBE CO Ltd
Original Assignee
SHANGHAI YUEYUECHAO STEEL TUBE CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHANGHAI YUEYUECHAO STEEL TUBE CO Ltd filed Critical SHANGHAI YUEYUECHAO STEEL TUBE CO Ltd
Priority to CN2010101893157A priority Critical patent/CN102267038A/en
Publication of CN102267038A publication Critical patent/CN102267038A/en
Pending legal-status Critical Current

Links

Abstract

The invention discloses a method for manufacturing a steel pipe made of high-strength steel. The method comprises the following steps of: strip cutting, in which a steel plate is vertically cut; edge milling, in which two side edges of the steel plate are milled at one time; pre-bending, in which straight edges of a plate end are eliminated; bending, in which the steel plate is preliminarily bent to be cylindrical; molding, in which the cylindrical steel plate forms the steel pipe; seam-joint pre-welding, in which a connecting end of the steel pipe is subjected to seam joint; interior welding, in which the interior of the connecting end of the steel pipe is welded; exterior welding, in which the exterior of the connecting end of the steel pipe is welded; pipe end processing, in which a flat head of a pipe end of the steel pipe is processed; straightening, in which straightness which accords with the standard can be realized by straightening; accurate shaping, in which an O-shaped mold is used for performing forced accurate shaping; end smoothing, in which an end head of the steel pipe is smoothed; final detection, in which the steel pipe is detected; and warehousing, in which the steel pipe is determined to be qualified and then warehoused. In the method, measures for preventing longitudinal cracks of a welding seam from being generated comprise pre-accurate shaping before control of pre-bending roundness and interior welding.

Description

The manufacture method of high strength steel steel pipe
Technical field
The present invention relates to a kind of manufacture method of steel, particularly relate to a kind of manufacture method of high strength steel steel pipe.
Background technology
Along with developing rapidly of crane gear, high strength steel (especially Q690E type high strength steel) uses the not competent main position in engineering of traditional low-alloy steel on a large scale in super large floating crane and boats and ships and bridge manufacturing.Crane barge boats and ships and bridge manufacturing industry are actively used Q690E type high strength steel, but because its steel pipe is made and the difficulty of welding, each big designing institute and production commercial city dare not be used easily.In addition, the yield strength 〉=690Mpa of Q690E type high strength steel (its chemical composition is as shown in table 1), tensile strength is 770-940Mpa.Intensity and hardness are higher, very likely crack after difficult forming and the welding, and the moulding difficulty increases along with plate thickness and strengthens, and mainly is the difficulty of pre-bending bending joint close and integer; Thereby welding causes carbon equivalent higher because of alloying component is higher, and solderability is reduced, and the steel heat affecting is easy to generate the inductile hardened structure, and hardenability also is easy to generate crackle along with the thickness increase.
The chemical composition of table 1Q690E type high strength steel
Model C Mn P S Si Nb.V
Q690E 0.10≤ 2.00≤ 0.020 0.01≤ 0.6≤ 0.08≤
Model TI Cr.Mo .Cu NI B Co Pcm
Q690E 0.03≤ 0.5≤ 0.8≤ 0.003≤ 0.5≤ 0.25≤
Summary of the invention
For the intensity that solves high strength steel in the prior art with hardness is higher, the technical problem that very likely cracks after difficult forming and the welding, the invention provides a kind of manufacture method of high strength steel steel pipe.
The present invention solves above-mentioned technical problem by following technical proposals: a kind of manufacture method of high strength steel steel pipe is characterized in that it may further comprise the steps:
Step 1: open bar, a block plate is carried out perpendicular cuts;
Step 2: mill the limit, to the dual-side of steel plate by a Milling Process;
Step 3: pre-bending, pre-bending are to eliminate plate end straight flange, earlier the side of steel plate are bent circular arc, repeatedly are bent to the circular arc requirement with the standard patrix again;
Step 4: bending tentatively is converted into tubular with steel plate;
Step 5: moulding, the steel plate formation steel pipe with tubular compresses the steel pipe whole circumference during moulding, makes even along the residual stress on thickness of steel pipe and the circumferencial direction;
Step 6: the joint close prewelding, carry out joint close with the link of steel pipe;
Step 7: interior weldering, interior weldering is welded the link inside of steel pipe;
Step 8: outside weld, outside weld is welded the link outside of steel pipe;
Step 9: pipe end processing, carry out the pipe end tack processing of steel pipe;
Step 10: aligning needs through just reaching the linearity that standard allows behind the aligning;
Step 11: finishing, force accurate shaping with O shape mould;
Step 12: repair end, make the termination of steel pipe level and smooth;
Step 13: the final detection, steel pipe is detected;
Step 14: warehouse-in, steel pipe detects warehousing after passing and deposits.
Preferably, monofilament automatic submerged arc welding is adopted in described interior weldering.
Preferably, the automatic submerged arc welding of monofilament multilayer multiple tracks is adopted in described outside weld.
Preferably, described final detection comprises that ultrasound examination, X ray detection, magnetic detection, Non-Destructive Testing, hydraulic pressure detect and take advantage of the magnetic detection.
Positive progressive effect of the present invention is: the present invention prevents that the main technique measure of quenching of heat affected area from being to adopt the little heat input of welding, reduces high-temperature residence time, reduces and exempt the weld crack possibility greatly; The measure that the present invention prevents to produce the weld seam longitudinal crack is to carry out pre-finishing before control pre-bending bending circularity and the interior weldering prerequisite.
Description of drawings
Fig. 1 is the flow chart of one embodiment of the invention.
The specific embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to describe technical scheme of the present invention in detail.
The manufacture method of high strength steel of the present invention is used to make Q690E type high strength steel steel pipe.As shown in Figure 1, the manufacture method of high strength steel of the present invention may further comprise the steps:
Step 1: open bar, a high strength steel steel plate is carried out perpendicular cuts;
Step 2: mill the limit, to the dual-side of steel plate by a Milling Process;
Step 3: pre-bending, pre-bending mainly are to eliminate plate end straight flange, earlier the side of steel plate are bent circular arc, repeatedly are bent to the circular arc requirement with the standard patrix again, have so not only satisfied the pre-bending requirement but also have saved steel plate materials; The high pre-bending of invar intensity does not reach eliminates the straight flange requirement, changes original pre-bending, a pre-bending several times.
Step 4: bending tentatively is converted into tubular with steel plate; Emphasis control bending circularity, circularity generally is controlled in 20 millimeters, avoids shaping to cross ambassador's weld seam because of roundness deviation and longitudinal crack occurs.
Step 5: moulding, the steel plate of tubular is formed steel pipe, during moulding the steel pipe whole circumference is compressed, make even along the residual stress on thickness of steel pipe and the circumferencial direction, can be reduced to the stress of shape steel tube on the one hand, provide convenience for postorder joint close prewelding on the other hand;
Step 6: the joint close prewelding, carry out joint close with the link of steel pipe;
Step 7: interior weldering, interior weldering is welded the link inside of steel pipe, and monofilament automatic submerged arc welding is adopted in interior weldering, shaping and the weld seam longitudinal crack occurs again after avoiding all having welded; Weld preheating welded seam area, preheating width are in 100 millimeters on the weld seam both sides, and preheat temperature 150 is spent to 200 degree.
Step 8: outside weld, outside weld is welded the link outside of steel pipe, and the automatic submerged arc welding of monofilament multilayer multiple tracks is adopted in outside weld; Weld preheating welded seam area, preheating width are in 100 millimeters on the weld seam both sides, and preheat temperature 150 is spent to 200 degree.
Step 9: pipe end processing, carry out the pipe end tack processing of steel pipe;
Step 10: aligning needs through just reaching the linearity that standard allows behind the aligning;
Step 11: finishing, force accurate shaping with O shape mould, to reach higher circularity and straight degree;
Step 12: repair end, make the termination of steel pipe bright and clean level and smooth;
Step 13: the final detection, steel pipe to be detected, the final detection comprises ultrasound examination, X ray detection, magnetic detection, Non-Destructive Testing, hydraulic pressure detection and takes advantage of magnetic to detect;
Step 14: warehouse-in, steel pipe detects warehousing after passing and deposits.
The present invention prevents that the main technique measure of quenching of heat affected area from being to adopt the little heat input of welding, reduces high-temperature residence time, reduces and exempt the weld crack possibility greatly; The measure that the present invention prevents to produce the weld seam longitudinal crack is to carry out pre-finishing before control pre-bending bending circularity and the interior weldering prerequisite.
Though more than described the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, under the prerequisite that does not deviate from principle of the present invention and essence, can make numerous variations or modification to these embodiments.Therefore, protection scope of the present invention is limited by appended claims.

Claims (4)

1. the manufacture method of a high strength steel steel pipe is characterized in that, it may further comprise the steps:
Step 1: open bar, a block plate is carried out perpendicular cuts;
Step 2: mill the limit, to the dual-side of steel plate by a Milling Process;
Step 3: pre-bending, pre-bending are to eliminate plate end straight flange, earlier the side of steel plate are bent circular arc, repeatedly are bent to the circular arc requirement with the standard patrix again;
Step 4: bending tentatively is converted into tubular with steel plate;
Step 5: moulding, the steel plate formation steel pipe with tubular compresses the steel pipe whole circumference during moulding, makes even along the residual stress on thickness of steel pipe and the circumferencial direction;
Step 6: the joint close prewelding, carry out joint close with the link of steel pipe;
Step 7: interior weldering, interior weldering is welded the link inside of steel pipe;
Step 8: outside weld, outside weld is welded the link outside of steel pipe;
Step 9: pipe end processing, carry out the pipe end tack processing of steel pipe;
Step 10: aligning needs through just reaching the linearity that standard allows behind the aligning;
Step 11: finishing, force accurate shaping with O shape mould;
Step 12: repair end, make the termination of steel pipe level and smooth;
Step 13: the final detection, steel pipe is detected;
Step 14: warehouse-in, steel pipe detects warehousing after passing and deposits.
2. the manufacture method of high strength steel steel pipe as claimed in claim 1 is characterized in that, monofilament automatic submerged arc welding is adopted in described interior weldering.
3. the manufacture method of high strength steel steel pipe as claimed in claim 1 is characterized in that, the automatic submerged arc welding of monofilament multilayer multiple tracks is adopted in described outside weld.
4. the manufacture method of high strength steel steel pipe as claimed in claim 1 is characterized in that, described final detection comprises that ultrasound examination, X ray detection, magnetic detection, Non-Destructive Testing, hydraulic pressure detect and take advantage of the magnetic detection.
CN2010101893157A 2010-06-01 2010-06-01 Method for manufacturing steel pipe made of high-strength steel Pending CN102267038A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010101893157A CN102267038A (en) 2010-06-01 2010-06-01 Method for manufacturing steel pipe made of high-strength steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010101893157A CN102267038A (en) 2010-06-01 2010-06-01 Method for manufacturing steel pipe made of high-strength steel

Publications (1)

Publication Number Publication Date
CN102267038A true CN102267038A (en) 2011-12-07

Family

ID=45049601

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010101893157A Pending CN102267038A (en) 2010-06-01 2010-06-01 Method for manufacturing steel pipe made of high-strength steel

Country Status (1)

Country Link
CN (1) CN102267038A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103084427A (en) * 2012-07-09 2013-05-08 上海月月潮钢管制造有限公司 Manufacturing method of hardenability steel tube
CN103182629A (en) * 2011-12-31 2013-07-03 上海和达汽车配件有限公司 Forming method for high strength steel pipe fittings with unequal wall thickness and irregular pipe fittings
CN103752998A (en) * 2014-01-08 2014-04-30 合肥紫金钢管有限公司 Method for manufacturing high-weather-resistance multi-wire submerged-arc welded steel pipes for marine environments
CN104786017A (en) * 2015-01-30 2015-07-22 张家港市博天机械有限公司 Manufacturing method of pressure vessel metal tube
CN108747216A (en) * 2018-06-01 2018-11-06 江阴市三和重工钢制品有限公司 The manufacturing process of No. 35 steel submerged-arc welded (SAW) pipes of wear-resisting dredging
CN110159053A (en) * 2019-06-25 2019-08-23 中电建成都铁塔有限公司 A kind of power transmission line polygon rod structure and its manufacture craft
CN110216420A (en) * 2019-05-31 2019-09-10 张家港华程机车精密制管有限公司 A kind of manufacturing method of the welded still pipe for crawler crane string abdomen arm

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1555935A (en) * 2003-12-31 2004-12-22 朱才科 Spiral welding pipe welding method
CN101205597A (en) * 2007-12-10 2008-06-25 华北石油管理局第一机械厂 Method for manufacturing X100 pipeline steel submerged arc straight weld pipe
CN101204720A (en) * 2007-12-10 2008-06-25 华北石油管理局第一机械厂 Manufacture method of X80 pipeline JCOE direct sew submerged arc welding tube

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1555935A (en) * 2003-12-31 2004-12-22 朱才科 Spiral welding pipe welding method
CN101205597A (en) * 2007-12-10 2008-06-25 华北石油管理局第一机械厂 Method for manufacturing X100 pipeline steel submerged arc straight weld pipe
CN101204720A (en) * 2007-12-10 2008-06-25 华北石油管理局第一机械厂 Manufacture method of X80 pipeline JCOE direct sew submerged arc welding tube

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
吴辉、蒋文凯、曲宾等: "大口径直缝埋弧焊管制造技术", 《世界制造技术与装备市场》 *
唐子金: "X80级直缝埋弧焊钢管开发", 《焊管》 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103182629A (en) * 2011-12-31 2013-07-03 上海和达汽车配件有限公司 Forming method for high strength steel pipe fittings with unequal wall thickness and irregular pipe fittings
CN103084427A (en) * 2012-07-09 2013-05-08 上海月月潮钢管制造有限公司 Manufacturing method of hardenability steel tube
CN103084427B (en) * 2012-07-09 2014-08-13 上海月月潮钢管制造有限公司 Manufacturing method of hardenability steel tube
CN103752998A (en) * 2014-01-08 2014-04-30 合肥紫金钢管有限公司 Method for manufacturing high-weather-resistance multi-wire submerged-arc welded steel pipes for marine environments
CN104786017A (en) * 2015-01-30 2015-07-22 张家港市博天机械有限公司 Manufacturing method of pressure vessel metal tube
CN108747216A (en) * 2018-06-01 2018-11-06 江阴市三和重工钢制品有限公司 The manufacturing process of No. 35 steel submerged-arc welded (SAW) pipes of wear-resisting dredging
CN110216420A (en) * 2019-05-31 2019-09-10 张家港华程机车精密制管有限公司 A kind of manufacturing method of the welded still pipe for crawler crane string abdomen arm
CN110159053A (en) * 2019-06-25 2019-08-23 中电建成都铁塔有限公司 A kind of power transmission line polygon rod structure and its manufacture craft

Similar Documents

Publication Publication Date Title
CN102267038A (en) Method for manufacturing steel pipe made of high-strength steel
CN103540867B (en) A kind of X80 level straight-line joint submerged arc welding tube of anti-H 2 S stress corrosion and manufacture method thereof
CN103722346B (en) A kind of corrosion resistance metallurgical composite bimetal longitudinal submerged arc welded pipe and preparation method
CN102699107B (en) Cold roll forming method of thin-walled and high-strength square steel tube
CN100547103C (en) A kind of method for manufacturing high-strength X 80 steel spiral welded pipe
CN101205597B (en) Method for manufacturing X100 pipeline steel submerged arc straight weld pipe
JP4832287B2 (en) Manufacturing method of cold-worked high-strength seamless corrosion-resistant pipe
CN101797600B (en) Method for manufacturing high-strength X100 steel grade spiral seam submerged arc welded pipe
CN102310119B (en) Manufacturing method of X65 pipeline steel longitudinal submerged arc welded pipe for undersea use
CN103084427B (en) Manufacturing method of hardenability steel tube
CN102407425A (en) Method for manufacturing ventilated steel tube made of hull steel
CN103521550B (en) A kind of X90 level pipe line steel heavy caliber thick wall straight-line joint submerged arc welding tube manufacture method
CN101886222B (en) Method for manufacturing high-strength X90 steel grade spiral submerged arc welded pipe
CN103521549B (en) A kind of manufacture method of X100 Hi-grade steel heavy caliber thick wall straight-line joint submerged arc welding tube
CN102205458B (en) Manufacturing method for X120 steel-level spiral seam hidden arc welding tube
CN102330034A (en) X65MS steel-grade spiral welded tube for acidic corrosion environment and manufacturing method thereof
CN102397941A (en) Manufacturing method for X90 pipeline steel longitudinal submerged arc welding pipe
CN100451415C (en) Double-seam submerged-arc welding pipe with petroleum and natural-gas transfer and its production
CN102294571A (en) Method for manufacturing high-temperature and high-pressure steel pipe
CN103212952A (en) Manufacturing method of super-large-diameter large-wall thick longitudinal submerged arc welded pipe
CN102407246A (en) Method for manufacturing high-strength bridge steel tube
CN108247292A (en) A kind of manufacturing method of super-duplex stainless steel Welding Thick Pipe
CN110000517B (en) Marine high-strain welded steel pipe based on dual-phase structure and preparation method thereof
CN102330032A (en) Acid-proof X70MS steel-grade spiral welded pipe and manufacturing method thereof
CN105382499A (en) Precise stainless steel bright annealing pipe production technology

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20111207

C02 Deemed withdrawal of patent application after publication (patent law 2001)