CN102632327A - Single edge groove submerged arc welding technique of plate with moderate thickness - Google Patents
Single edge groove submerged arc welding technique of plate with moderate thickness Download PDFInfo
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- CN102632327A CN102632327A CN2012101205014A CN201210120501A CN102632327A CN 102632327 A CN102632327 A CN 102632327A CN 2012101205014 A CN2012101205014 A CN 2012101205014A CN 201210120501 A CN201210120501 A CN 201210120501A CN 102632327 A CN102632327 A CN 102632327A
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Abstract
The invention discloses a single edge groove submerged arc welding technique of a plate with moderate thickness. The technique utilizes a DC (direct current) opposition method, and comprises the following technical steps: first to third layers on the facade: a phi 3.2 welding wire is utilized, the current is 380-400A, a rod is stretched by 2.8-3.0cm, the voltage is 24-25V, and the speed is 55-57cm/min; the other layers on the facade of the welding rail: a phi 4 welding wire is utilized, the rod is stretched by 3.0-3.5cm, the current is 560-600A, the voltage is 28-30V and the speed is 45-50 cm/min, or a phi 4 welding wire is utilized, the rod is stretched by 3.8-4.0cm, the current is 650-680A, the voltage is 33-34V, and the welding speed is 38-40 cm/min; and the back surface layer: a phi 4 welding wire is utilized, the rod is stretched by 3.8-4.2cm, the current is 680-700A, the voltage is 34-35V, and the speed is 34-36 cm/min. According to the invention, the submerged arc welding is directly used for bottoming, and no back chipping is performed on the back surface of the weld, thereby solving the complex welding method of the traditional technique, guaranteeing the percent of pass of the weld flaw detection, reducing the welding time and saving the welding material.
Description
Affiliated technical field
The invention belongs to solder technology, particularly the monolateral groove welding technique of submerged arc welding of cut deal.
Background technology
In the welding of the monolateral groove submerged-arc welding of cut deal at present, be example with the submerged-arc welding of traditional slab monolateral " レ " shape groove, root adopts manual electric arc welding or gas shielded arc welding bottoming, and the carbon arc air gouging back chipping is taked at the postwelding back side.If use full submerged-arc welding, because monolateral " レ " shape groove bottom angle is little, form the molten bath difficulty, be prone to produce lack of penetration; Groove root angle is too narrow, and there is bigger welding residual stress in welding point, and the cold contraction of weld seam back welding slag is removed difficulty and easy slag inclusion, cracks; Be easy to generate pore behind the carbon arc air gouging back chipping, wayward appearance of weld in the welding.Article one, welding bead needs the workman of 4 different work posts to accomplish.
Summary of the invention
The present invention aims to provide a kind of monolateral groove welding technique of submerged arc welding of cut deal that overcomes the weak point of above-mentioned prior art existence; Only adopt submerged welding process, do not adopt other welding methods, and the new submerged welding process that does not carry out the carbon arc air gouging back chipping guarantees weldquality; Article one, welding bead only needs 1 submerged-arc welding workman just can accomplish; Reduce labor, enhance productivity, increase economic efficiency.
The technical scheme of invention: the monolateral groove welding technique of submerged arc welding of cut deal, adopt the dc reverse connection method, its processing step is:
Positive the 1st～3 layer: φ 3.2 welding wires, bar elongation 2.8～3.0cm, electric current 380～400A, voltage 24～25V, speed 55～57cm/min.
Positive other layers of welding bead: φ 4 welding wires, bar elongation 3.0～3.5cm, electric current 560～600A, voltage 28～30V, speed 45～50cm/min; φ 4 welding wires, bar elongation 3.8～4.0cm, electric current 650～680A, voltage 33～34V, speed of welding 38～40cm/min.
Back layer: φ 4 welding wires, bar elongation 3.8～4.2cm, electric current 680～700A, voltage 34～35V, speed 34～36cm/min.
The welding bead that welds out of coupling of this cover welding parameter just, back side moulding is good, and it is easy to take off slag, and can not burn, and the back side does not need back chipping, guarantees the quality of weld seam, is fit to the welding of the monolateral groove of various carbon steel cut deals.
Advantage of the present invention: directly adopt the submerged-arc welding bottoming, back of weld does not need back chipping, has solved the complicated welding method of traditional handicraft, has guaranteed the qualification rate of seam inspection simultaneously, when having reduced the Welder, has practiced thrift welding material.
Description of drawings
Fig. 1 is that test plate (panel) welding point group is to figure;
Fig. 2 is S460 test plate (panel) knot weld seam sketch map;
Fig. 3 is S355 test plate (panel) knot weld seam sketch map.
The specific embodiment
Embodiment 1:S460 submerged-arc welding soldering test.
The test piece for welding group is seen Fig. 1 to sketch map.
Welding procedure: adopt the dc reverse connection method; Welding bead adopts φ 3.2 welding wires for positive the 1st～3 layer, bar elongation 3.0cm, electric current 400A, voltage 24V, speed of welding 57cm/min; Positive other layers of welding bead adopt φ 4 welding wires, bar elongation 3.5cm, electric current 600A, voltage 30V, speed of welding 45cm/min; Welding bead completion back, front flange weldering back bead, the back bead layer adopts φ 4 welding wires, bar elongation 4.2cm, electric current 700A, voltage 35V, speed of welding 36cm/min, evenly heat input 24kJ/cm.The weld seam sketch map is seen Fig. 2, and welding condition is seen table 1.
The welding condition of table 1 welding test plate (panel)
Embodiment 2:S355 submerged-arc welding soldering test.
The test piece for welding group is seen Fig. 1 to sketch map.
Welding procedure: adopt the dc reverse connection method; Welding bead adopts φ 3.2 welding wires for positive the 1st～3 layer, bar elongation 3.0cm, electric current 400A, voltage 24V, speed of welding 57cm/min; Welding bead positive 4～12 adopts φ 4 welding wires, bar elongation 3.5cm, electric current 600A, voltage 30V, speed of welding 45cm/min; Welding bead positive 13～55 adopts φ 4 welding wires, bar elongation 3.5cm, electric current 680A, voltage 34V, speed of welding 40cm/min; Welding bead completion back, front flange weldering back bead, the back bead layer adopts φ 4 welding wires, bar elongation 4.2cm, electric current 700A, voltage 35V, speed of welding 36cm/min, evenly heat input 35kJ/cm.
The weld seam sketch map is seen Fig. 3, and welding condition is seen table 2.
The welding condition of table 2 welding test plate (panel)
Impact specimen adopts the summer of standard to compare v-notch.This test is upper surface 2mm, middle part and bottom lower surface 2mm at the top of joint straight flange and groove face, respectively at the weld seam center, melt run, get apart from positions such as melt run 2mm and 5mm and to impact appearance, impact test temperature adopts-40 ℃.Impact test numerical value meets the demands.
Through to S460 and S355 steel plate submerged-arc welding soldering test; The result shows: the S460 steel plate is input as under 24kJ/cm and S355 steel plate be input as 35kJ/cm in heat the condition in heat and welds; The tensile property of welding point, bending property and impact property are good, satisfy EN10225-2009 " but fixedly offshore structure welded structural steel technology terms of delivery " standard-required.
Claims (1)
1. the monolateral groove welding technique of submerged arc welding of cut deal adopts the dc reverse connection method, it is characterized in that processing step is:
Positive the 1st～3 layer: φ 3.2 welding wires, bar elongation 2.8～3.0cm, electric current 380～400A, voltage 24～25V, speed 55～57cm/min;
Positive other layers of welding bead: φ 4 welding wires, bar elongation 3.0～3.5cm, electric current 560～600A, voltage 28～30V, speed 45～50cm/min; φ 4 welding wires, bar elongation 3.8～4.0cm, electric current 650～680A, voltage 33～34V, speed of welding 38～40cm/min;
Back layer: φ 4 welding wires, bar elongation 3.8～4.2cm, electric current 680～700A, voltage 34～35V, speed 34～36cm/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101205014A CN102632327A (en) | 2012-04-23 | 2012-04-23 | Single edge groove submerged arc welding technique of plate with moderate thickness |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101205014A CN102632327A (en) | 2012-04-23 | 2012-04-23 | Single edge groove submerged arc welding technique of plate with moderate thickness |
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| CN102632327A true CN102632327A (en) | 2012-08-15 |
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| CN2012101205014A Pending CN102632327A (en) | 2012-04-23 | 2012-04-23 | Single edge groove submerged arc welding technique of plate with moderate thickness |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107876941A (en) * | 2016-09-29 | 2018-04-06 | 海阳中集来福士海洋工程有限公司 | Steel plate buried arc welding method |
| CN115229312A (en) * | 2022-08-25 | 2022-10-25 | 湖南华菱湘潭钢铁有限公司 | 06Ni9DR steel 35kJ/cm high heat input submerged arc welding method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101081460A (en) * | 2007-03-26 | 2007-12-05 | 南阳二机石油装备(集团)有限公司 | Large-sized T shaped joint full penetration assembled welding process |
| CN101513695A (en) * | 2009-04-03 | 2009-08-26 | 燕山大学 | Welding method of Q420qE grade ultra-low-carbon bainite steel for bridges |
| CN101817113A (en) * | 2010-03-12 | 2010-09-01 | 安徽杭萧钢结构有限公司 | Suspended welding process of thick plate |
| CN102240841A (en) * | 2011-06-30 | 2011-11-16 | 首钢总公司 | Submerged-arc welding process for T-type joint for extra thick steel plate |
-
2012
- 2012-04-23 CN CN2012101205014A patent/CN102632327A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101081460A (en) * | 2007-03-26 | 2007-12-05 | 南阳二机石油装备(集团)有限公司 | Large-sized T shaped joint full penetration assembled welding process |
| CN101513695A (en) * | 2009-04-03 | 2009-08-26 | 燕山大学 | Welding method of Q420qE grade ultra-low-carbon bainite steel for bridges |
| CN101817113A (en) * | 2010-03-12 | 2010-09-01 | 安徽杭萧钢结构有限公司 | Suspended welding process of thick plate |
| CN102240841A (en) * | 2011-06-30 | 2011-11-16 | 首钢总公司 | Submerged-arc welding process for T-type joint for extra thick steel plate |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107876941A (en) * | 2016-09-29 | 2018-04-06 | 海阳中集来福士海洋工程有限公司 | Steel plate buried arc welding method |
| CN107876941B (en) * | 2016-09-29 | 2020-08-28 | 海阳中集来福士海洋工程有限公司 | Submerged arc welding method for steel plate |
| CN115229312A (en) * | 2022-08-25 | 2022-10-25 | 湖南华菱湘潭钢铁有限公司 | 06Ni9DR steel 35kJ/cm high heat input submerged arc welding method |
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Application publication date: 20120815 |