CN106624614A - Manufacturing process for large-diameter thick-wall high-strength welded tube - Google Patents
Manufacturing process for large-diameter thick-wall high-strength welded tube Download PDFInfo
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- CN106624614A CN106624614A CN201610888849.6A CN201610888849A CN106624614A CN 106624614 A CN106624614 A CN 106624614A CN 201610888849 A CN201610888849 A CN 201610888849A CN 106624614 A CN106624614 A CN 106624614A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
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- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
The invention discloses a manufacturing process for a large-diameter thick-wall high-strength welded tube. A high-quality hot-rolled steel plate is adopted as a tube manufacturing raw material. The manufacturing process includes the main steps of plate edge groove machining, forming, high-frequency welding, internal burr removing, submerged arc welding, on-line heat treatment of weld joints, diameter-fixing finishing, straightening, and mark spraying and warehousing. A plate edge groove is a Y-shaped welding groove with the groove angle of 50-60 degrees, and the length range of the blunted edge is 10-20 mm. By means of the adopted technical scheme, a seamless tube is replaced with the large-diameter thick-plate welded tube, and the maximum wall thickness can reach 40 mm; the weldable thickness is increased in the technical scheme compared with singular high-frequency welding, removing of outer burrs generated in high-frequency welding is omitted, and the tube manufacturing procedure is accelerated; and welding workload is lowered compared with singular submerged arc welding, welding efficiency is improved, welding material consumption is reduced, and the welding cost is reduced.
Description
Technical field
The technical program is related to welded tube manufacturing technology field, and in particular to a kind of manufacture work of the high-strength welded tube of heavy caliber thick wall
Skill.
Background technology
Thick-walled pipe is also referred to as thick walled steel tube, the steel pipe that the ratio of outer diameter of steel pipes and wall thickness is less than 20 is called thick walled steel tube, mainly
It is used as the structural tubes such as petroleum geology drill pipe, construction steel structure.At present, the more employing steel ingot of domestic and international large diameter thick wall steel pipe or
Solid pipe billet perforated makes hollow billet, and then hot rolled, cold rolling or cold group is made.Welded tube mainly produces light-wall pipe, and seamless pipe is then
Wall thickness there are certain requirements, but for seamless steel pipe, using welded still pipe most distinguishing feature be wall thickness dimension high precision,
With high collapse-resistance, while manufacturing process is short, production efficiency is high, specification limit width, and also energy-conservation, low production cost, product
Cost performance is high.Therefore, energy-saving, under the requirement of environmental protection, more applications using low-cost high-efficiency welded tube
It is development trend to substitute high energy consumption, the seamless rolled pipe of high pollution.The fact is also really thus, the steel pipe manufacture such as American-European and Japan and Korea S is strong
State has welded tube to replace the trend of seamless pipe.
Thick walled steel tube of the radius-thickness ratio less than 20 is manufactured with welded tube, Major Difficulties are：Such as adopt high-frequency welding, then caliber and
Thickness is restricted, general thickness≤20mm；Submerged arc welding is such as adopted, bevel for welding processing capacity is big, it is more to consume wlding, welds
Deformation is big, directly affects tubulation dimensional accuracy, due to multi-pass welding, weld defect probability occurs greatly, and weldquality cannot have
Effect ensures.
The content of the invention
The technical problem to be solved is the deficiency and a kind of heavy caliber of offer existed for above-mentioned prior art
The manufacturing process of the high-strength welded tube of heavy wall, realizes heavy caliber thick plates pipe and substitutes seamless pipe, and thickest, up to 40mm, is one
Plant low cost, high-quality, efficient Welding Thick Pipe manufacturing process.
The present invention is to solve the problems, such as that adopted technical scheme set forth above is：
A kind of manufacturing process of the high-strength welded tube of heavy caliber thick wall, is high-quality hot rolled steel plate using tubulation raw material, key step
It is as follows：Edges of boards retaining wall on slope, plate body flaw detection, shaping, high-frequency welding, Removing of inner burs, submerged arc welding, weld seam burning optimization on line,
Sizing finishing, aligning, body nondestructive inspection, spray mark warehouse-in.
By such scheme, the high-quality hot rolled steel plate yield strength 235～750MPa of scope for being adopted, tensile strength 480～
890MPa, thickness is less than 40mm.Wherein, thickness preferably 14～40mm.
By such scheme, the groove is Y type bevel for weldings, and bevel angle is 50 °～60 °, and root face length range is 10
～20mm.Edges of boards retaining wall on slope form is as shown in Figure 1.
By such scheme, the high-frequency welding is that the root face to edges of boards groove is welded, 10～20mm of throat thickness；Institute
It is that edges of boards groove is welded to state submerged arc welding, 4～20mm of throat thickness, can be selected according to actual welding thickness and bevel angle
Select monofilament or multi-wire submerged-arc welding.Due to the high-frequency welding for first carrying out root face, after carry out groove submerged arc welding, so high-frequency welding
The outer burr for producing can directly be melted into weld seam by submerged arc welding, save outer burr removing step.
By such scheme, the high-frequency welding FREQUENCY CONTROL is in 100～150KHz, 14≤v of speed of welding≤20m/min.
By such scheme, the submerged arc welding can be according to throat thickness using monofilament or multifibres Combination Welding, speed of welding
0.5～3.0m/min.
By such scheme, the welding material that the submerged-arc welding is adopted for 500～800MPa of tensile strength solid core welding wire
Matching alkalescent sintered flux.
By such scheme, the weld seam can online carry out normalizing or modifier treatment, to obtain excellent obdurability matching.
By such scheme, each 25mm of pipe end pipe tail is cut off in the sizing finishing, to ensure weldquality stability, according to
Caliber requires that submerged arc weld surface reinforcement is controlled within 1mm.
Specifically, the manufacturing process of the high-strength welded tube of above-mentioned heavy caliber thick wall, is high-quality hot rolled steel plate using tubulation raw material, main
Step is wanted to be followed successively by：
(1) by the plate edge machined of high-quality hot rolled steel plate into Y type bevel for weldings；
(2) step (1) gained plate body is carried out into flaw detection zero defect, after shaping, high frequency is carried out to the root face of Y type bevel for weldings
Welding, welding removes inner burr after finishing；Then submerged arc welding is carried out to the groove of Y type bevel for weldings；
(3) online modifier treatment is carried out to the weld seam of step (2) gained body；
(4) sizing finishing is carried out to step (3) gained body, submerged arc weld surface reinforcement is controlled within 1mm；
(5) to carrying out ultrasonic examination after step (4) gained body aligning, spray printing mark, packaging and warehousing after zero defect.
By such scheme, it is described be shaped to be pressed into it is O-shaped or square etc..
By such scheme, in the sizing finishing and each 25mm of pipe end pipe tail is cut off, to ensure weldquality stability.
The high-strength welded tube of of the invention gained heavy caliber thick wall is caliber 273～660mm of scope Φ, wall thickness range 14.0～
The pipe of 40.0mm, yield strength 235～750MPa of scope, 480～890MPa of tensile strength.
Compared with prior art, the invention has the beneficial effects as follows：
The technical solution adopted in the present invention realizes heavy caliber thick plates pipe and substitutes seamless pipe, and thickest is reachable
40mm, this technical scheme increased solderable thickness than single ratio-frequency welding, and need not remove outer burr produced by high-frequency welding, contracting
Short tubulation operation；Welding job amount is reduced than single submerged-arc welding, welding efficiency is improved, welding material expenditure, reduction welding is reduced
Cost.Meanwhile, the present invention has ratio-frequency welding and submerged-arc welding advantage concurrently, improves production efficiency, reduces production cost, it is ensured that weldering
Seam quality, can realize caliber 273～660mm of scope Φ, the continuous and stable production of the pipe of 14.0～40.0mm of wall thickness range, energy
Enough relatively low production costs produce qualified heavy caliber thick wall pipe and large scale heavy wall square tube, are adapted to Welding Thick Pipe
Manufacture, with good application value.
Description of the drawings
Fig. 1 is the schematic diagram of the O-shaped cross section and Y type bevel for weldings for being pressed into O-shaped rear steel plate.
Specific embodiment
For a better understanding of the present invention, further of the invention is provided in technical scheme with reference to embodiment
Key technology is further described, but the present invention is not limited solely to the following examples.
Embodiment 1
A kind of high-strength welded tube of heavy caliber thick wall, it is that 890MPa, thickness are to adopt yield strength for 750MPa, tensile strength
The hot rolled steel plate of 14mm, welded tube specification is：Diameter 273mm, wall thickness 14mm, its manufacturing process is concretely comprised the following steps,
(1) by the plate edge machined of high-quality hot rolled steel plate into Y type bevel for weldings, 50 ° of bevel angle, root face length 10mm；
(2) step (1) gained plate body is carried out into flaw detection zero defect, shaping (is pressed into O-shaped rear steel plate and is as shaped to body)
Afterwards, high-frequency welding, welding frequency 150KHz, speed of welding 20m/min, throat thickness are carried out to the root face of Y type bevel for weldings
10mm, welding removes inner burr after finishing；
Then submerged arc welding is carried out to the groove of Y type bevel for weldings, from 800Mpa reality core welding wire for submerged-arc welding matching SJ101 welderings
Agent, monofilament DC reverse connection, speed of welding 0.5m/min, throat thickness 4mm；
(3) online modifier treatment is carried out to the weld seam of step (2) gained body, to obtain high-strength tenacity weld seam；
(4) sizing finishing is carried out to step (3) gained body, each 25mm of pipe end pipe tail is cut off in sizing finishing, to ensure
Weldquality stability, submerged arc weld surface reinforcement is controlled within 1mm；
(5) to carrying out ultrasonic examination after step (4) gained body aligning, spray printing mark, packaging and warehousing after zero defect.
Embodiment 2
A kind of high-strength welded tube of heavy caliber thick wall, it is that 480MPa, thickness are to adopt yield strength for 235MPa, tensile strength
The hot rolled steel plate of 40mm, welded tube specification is：Diameter 660mm, wall thickness 40mm, its manufacturing process is concretely comprised the following steps,
(1) by the plate edge machined of high-quality hot rolled steel plate into Y type bevel for weldings, 60 ° of bevel angle, root face length 20mm；
(2) step (1) gained plate body is carried out into flaw detection zero defect, after shaping, high frequency is carried out to the root face of Y type bevel for weldings
Welding, welding frequency 100KHz, speed of welding 14m/min, throat thickness 20mm, welding removes inner burr after finishing；
Then, submerged arc welding is carried out to the groove of Y type bevel for weldings, from 500Mpa reality core welding wire for submerged-arc welding matching SJ101
Solder flux, 3 submerged arc weldings, welding wire current polarity adopt DC reverse connection+exchange+exchange combining form, speed of welding 3.0m/min,
Throat thickness 20mm；
(3) online normalized treatment is carried out to the weld seam of step (2) gained body, to obtain high-strength tenacity weld seam；
(4) sizing finishing is carried out to step (3) gained body, each 25mm of pipe end pipe tail is cut off in sizing finishing, to ensure
Weldquality stability, submerged arc weld surface reinforcement is controlled within 1mm；
(5) to carrying out ultrasonic examination after step (4) gained body aligning, spray printing mark, packaging and warehousing after zero defect.
The welded tube mechanical property of embodiment 1
The welded tube mechanical property of embodiment 2
The body of the high-strength welded tube of the gained heavy caliber thick wall of embodiment 1 and 2 and the performance parameter of weld seam as shown in Table 1 and Table 2,
Good mechanical performance.It can thus be appreciated that：By technical scheme, it is possible to achieve prepare heavy caliber height using steel plate fierce
Adapter, can realize caliber 273～660mm of scope Φ, the continuous-stable of the large-sized heavy-wall tube of 14.0～40.0mm of wall thickness range
The various aspects of performance of production, body and weld seam is excellent, and seamless pipe can be substituted completely.
The above is only the preferred embodiment of the present invention, it is noted that for one of ordinary skill in the art comes
Say, without departing from the concept of the premise of the invention, some modifications and variations can also be made, these belong to the present invention's
Protection domain.
Claims (10)
1. the manufacturing process of the high-strength welded tube of a kind of heavy caliber thick wall, it is characterised in that it adopts tubulation raw material for high-quality hot-rolled steel
Plate, mainly comprises the following steps：Edges of boards retaining wall on slope, shaping, high-frequency welding, Removing of inner burs, submerged arc welding, weld seam burning optimization on line,
Sizing finishing, aligning, spray mark warehouse-in；The groove is Y type bevel for weldings, and bevel angle is 50 °～60 °, root face length range
For 10～20mm.
2. the manufacturing process of the high-strength welded tube of a kind of heavy caliber thick wall according to claim 1, it is characterised in that adopted
High-quality hot rolled steel plate yield strength 235～750MPa of scope, 480～890MPa of tensile strength, thickness is less than 40mm.
3. a kind of manufacturing process of the high-strength welded tube of heavy caliber thick wall according to claim 1, it is characterised in that the groove
For Y type bevel for weldings, bevel angle is 50 °～60 °, and root face length range is 10～20mm.
4. a kind of manufacturing process of the high-strength welded tube of heavy caliber thick wall according to claim 1, it is characterised in that the high frequency
Welding is that the root face to edges of boards groove is welded, 10～20mm of throat thickness；The submerged arc welding is that edges of boards groove is carried out
Welding, 4～20mm of throat thickness.
5. a kind of manufacturing process of the high-strength welded tube of heavy caliber thick wall according to claim 1, it is characterised in that the high frequency
Welding welding frequency is controlled in 100～150KHz, 14≤v of speed of welding≤20m/min.
6. a kind of manufacturing process of the high-strength welded tube of heavy caliber thick wall according to claim 1, it is characterised in that the submerged arc
Welding is using monofilament or multifibres Combination Welding, 0.5～3.0m/min of speed of welding.
7. a kind of manufacturing process of the high-strength welded tube of heavy caliber thick wall according to claim 1, it is characterised in that the submerged arc
The adopted welding material of weldering matches alkalescent sintered flux for the solid core welding wire of 500～800MPa of tensile strength.
8. a kind of manufacturing process of the high-strength welded tube of heavy caliber thick wall according to claim 1, it is characterised in that the sizing
Pipe end pipe tail is cut off in finishing, submerged arc weld surface reinforcement is controlled within 1mm.
9. the manufacturing process of the high-strength welded tube of a kind of heavy caliber thick wall, it is characterised in that it is high-quality hot-rolled steel using tubulation raw material
Plate, key step is followed successively by：
(1) by the plate edge machined of high-quality hot rolled steel plate into Y type bevel for weldings；
(2) step (1) gained plate body is carried out into flaw detection zero defect, after shaping, ratio-frequency welding is carried out to the root face of Y type bevel for weldings
Connect, welding removes inner burr after finishing；Then submerged arc welding is carried out to the groove of Y type bevel for weldings；
(3) online modifier treatment is carried out to the weld seam of step (2) gained body；
(4) sizing finishing is carried out to step (3) gained body, submerged arc weld surface reinforcement is controlled within 1mm；
(5) to carrying out ultrasonic examination after step (4) gained body aligning, spray printing mark, packaging and warehousing after zero defect.
10. the high-strength welded tube of heavy caliber thick wall in claim 1～9 described in any one, it is characterised in that its caliber scope
273～660mm of Φ, 14.0～40.0mm of wall thickness range.
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| CN201610888849.6A CN106624614B (en) | 2016-10-11 | 2016-10-11 | A kind of manufacturing process of the high-strength welded tube of heavy caliber thick wall |
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| CN201610888849.6A CN106624614B (en) | 2016-10-11 | 2016-10-11 | A kind of manufacturing process of the high-strength welded tube of heavy caliber thick wall |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108202178A (en) * | 2018-03-06 | 2018-06-26 | 陕西建工机械施工集团有限公司 | A kind of seamless pipe bushing pipe working apparatus |
| CN109955038A (en) * | 2017-12-26 | 2019-07-02 | 东莞市广信知识产权服务有限公司 | A kind of manufacture craft of sealing pipeline |
| CN110640278A (en) * | 2019-09-30 | 2020-01-03 | 广州黄船海洋工程有限公司 | Terminal crack prevention process for Q420 high-strength steel flux copper liner method submerged-arc welding |
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| CN110640278A (en) * | 2019-09-30 | 2020-01-03 | 广州黄船海洋工程有限公司 | Terminal crack prevention process for Q420 high-strength steel flux copper liner method submerged-arc welding |
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| CN106624614B (en) | 2019-08-23 |
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