WO2013080523A1 - 鋼板のサブマージアーク溶接方法 - Google Patents
鋼板のサブマージアーク溶接方法 Download PDFInfo
- Publication number
- WO2013080523A1 WO2013080523A1 PCT/JP2012/007610 JP2012007610W WO2013080523A1 WO 2013080523 A1 WO2013080523 A1 WO 2013080523A1 JP 2012007610 W JP2012007610 W JP 2012007610W WO 2013080523 A1 WO2013080523 A1 WO 2013080523A1
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- WIPO (PCT)
- Prior art keywords
- electrode
- wire
- arc welding
- submerged arc
- welding
- Prior art date
Links
- 238000003466 welding Methods 0.000 title claims abstract description 76
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 31
- 239000010959 steel Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000010410 layer Substances 0.000 claims description 13
- 239000002344 surface layer Substances 0.000 claims description 10
- 239000011324 bead Substances 0.000 abstract description 21
- 230000035515 penetration Effects 0.000 abstract description 21
- 238000002844 melting Methods 0.000 abstract description 4
- 230000008018 melting Effects 0.000 abstract description 4
- 230000002787 reinforcement Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 7
- 230000007547 defect Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000002356 single layer Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010953 base metal Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
Images
Classifications
-
- 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
- B23K9/18—Submerged-arc welding
- B23K9/186—Submerged-arc welding making use of a consumable electrodes
- B23K9/188—Submerged-arc welding making use of a consumable electrodes making use of several electrodes
-
- 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
- B23K33/006—Filling of continuous seams for cylindrical workpieces
-
- 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
- B23K2101/06—Tubes
-
- 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
Definitions
- the present invention relates to submerged arc welding of steel plates and relates to submerged arc welding suitable for seam welding of large diameter steel pipes such as UOE steel pipes and spiral steel pipes.
- seam welding of large-diameter steel pipes has a problem that the toughness of the welded part, particularly the heat-affected zone, is deteriorated, and it is necessary to reduce the welding heat input as much as possible in order to improve the toughness of the welded part.
- the welding heat input is reduced, there is a problem that the risk of inadequate penetration increases, unmelted portions are likely to occur, and surface defects such as undercut are likely to occur.
- Patent Document 3 discloses a method of submerged arc welding with high current density, in which arc energy is input in the plate thickness direction to ensure the necessary penetration depth and to melt the base metal in the plate width direction. By suppressing it, excessive welding heat input is prevented, and both reduction of welding heat input and securing of the penetration depth are achieved.
- Patent Document 4 discloses a submerged arc welding method in which double-sided single-layer welding is performed with multiple electrodes. By appropriately controlling the current supplied to each electrode, the bead width is widened and undercutting is performed. It tries to prevent surface defects.
- Patent Document 4 Although an effect of widening the bead width can be obtained, in order to significantly increase the bead width, a large current must be supplied, and as a result, welding heat input is reduced. There is a problem that the toughness of the welded part, particularly the heat-affected part, is deteriorated. Also, by supplying a large current, the amount of melting of the wire is increased and the height of the reinforcement is increased. Therefore, it is necessary to redesign the groove shape.
- the present invention can increase the toughness of the welded portion with low heat input, suppress excessive melting of the wire to reduce the surplus height, and obtain a deep penetration and a wide bead width.
- An object is to provide a submerged arc welding method.
- the present invention has been made on the basis of the above findings, and the gist thereof is as follows.
- the wire diameter of the first electrode at the head in the welding progress direction is 2.0 to 3.2 mm
- the current density is 145 A / mm 2 or more
- the second and subsequent electrodes are arranged in a row behind the first electrode.
- the shape of the groove formed on the steel plate to be welded is three or more electrodes, wherein the bottom layer side groove angle is ⁇ B and the surface layer side groove angle is ⁇ T and is a two-step groove satisfying ⁇ B ⁇ T.
- the present invention it is possible to achieve both reduction of welding heat input and securing of the penetration depth. Furthermore, since the height of the surplus can be lowered and a wide bead width can be obtained, it is advantageous for submerged arc welding and has a remarkable industrial effect.
- FIG. 1 is a perspective view schematically showing an example of the submerged arc welding method of the present invention.
- FIG. 2 is a side view of the electrode and steel plate in FIG.
- FIG. 3 is a plan view showing the position of the wire tip of each electrode in FIG. 1 on the steel plate surface.
- FIG. 4 is a cross-sectional view schematically showing an example of a groove shape to which the present invention is applied.
- FIG. 5 is a cross-sectional view schematically showing an example of a welded joint.
- FIG. 1 is a perspective view schematically showing an example in which a steel plate is welded by applying the submerged arc welding method of the present invention
- FIG. 2 is a side view thereof
- FIG. 3 is a plan view showing the tip position of each wire in FIG. 1 on the steel plate surface
- 4 is a cross-sectional view schematically showing an example of a groove shape to which the present invention is applied
- FIG. 5 is a cross-sectional view schematically showing an example of a welded joint of a steel plate having the groove. .
- FIGS. 1 to 3 show an example using three electrodes
- the present invention is a submerged arc welding method using three or more electrodes, and the number of electrodes is not limited to three.
- the first electrode 1 in the welding progress direction indicated by the arrow A is the first electrode 1, and the steel plate 5 on which the tip position of the wire 12 of the first electrode 1 advances.
- the locus on the surface be the weld line 6.
- the second electrode in the welding direction A is used as the second electrode 2 and is arranged behind the first electrode 1, and the third electrodes 3 are arranged in a row behind the second electrode 2.
- One wire 12, 22, 32 is supplied to each of the torches 11, 21, 31 of each electrode.
- the wire diameter of the wire 12 is set to 3.2 mm or less.
- the wire diameter is less than 2.0 mm, the wire 12 is too thin, so the wire feeding speed has to be increased to secure the required amount of weld metal, and as a result, the feedability (wire feed speed ) becomes unstable and stable welding cannot be performed. Therefore, the wire diameter of the wire 12 of the first electrode 1 is in the range of 2.0 to 3.2 mm.
- the current density of the current supplied to the wire 12 of the first electrode 1 can be increased by using the wire 12 having a small wire diameter. However, if it is less than 145 A / mm 2, it is sufficient. Depth penetration cannot be obtained. Therefore, the current density of the wire 12 of the first electrode 1 is set to 145 A / mm 2 or more. Further, if the current density of the wire 12 of the first electrode 1 is too large, the wire feeding speed must be increased, and as a result, stable welding cannot be performed. Therefore, the current density is preferably 310 A / mm 2 or less.
- the current supplied to the wire 12 of the first electrode 1 is a direct current in order to further increase the penetration depth.
- the first electrode 1 is set by inclining the wire 12 so that the tip of the wire 12 is located behind the torch 11 in the welding progress direction A (that is, on the second electrode side). It is preferable to do. It is preferable that the angle ⁇ (hereinafter referred to as the receding angle) formed by the wire 12 and the vertical line is 15 ° or less because the effect of increasing the penetration depth appears remarkably.
- the second electrode 2 is set so that the tip position 23 of the wire 22 on the steel plate surface is disposed on the weld line 6 as shown in FIG. If the wire diameter of the wire 22 is too thin, the surplus is likely to increase. Therefore, the wire diameter of the wire 22 is preferably set to 3.2 mm or more. On the other hand, if the wire diameter of the wire 22 is too large, slag entrainment is likely to occur. Therefore, the wire diameter of the wire 22 is preferably 4.0 mm or less.
- the current supplied to the wire 22 is preferably supplied with an alternating current in order to prevent arc interference from occurring with other electrodes.
- the second electrode 2 is set by inclining the wire 22 so that the tip of the wire 22 is positioned in front of the torch 21 in the welding progress direction A (that is, the first electrode side). It is preferable to do. If the angle ⁇ (hereinafter referred to as the advance angle) formed by the wire 22 and the vertical line is set to 5 ° or more, it is preferable because the effect of widening the bead width appears remarkably. If the advancing angle is too large, the torch must be made very long. Therefore, the advancing angle of the second electrode 2 is preferably 25 ° or less because of restrictions on equipment.
- the third electrode 3 is set so that the tip position 33 on the steel plate surface of the wire 32 is arranged on the weld line 6 as shown in FIG. If the wire diameter of the wire 32 is too thin, the surplus is likely to increase. Therefore, the wire diameter of the wire 32 is preferably set to 3.2 mm or more. On the other hand, if the wire diameter of the wire 32 is too large, the amount of wire welding decreases, so the wire diameter of the wire 32 is preferably 4.0 mm or less.
- the current supplied to the wire 32 is preferably supplied with an alternating current in order to prevent arc interference with other electrodes.
- the third electrode 3 is set by inclining the wire 32 so that the tip of the wire 32 is positioned in front of the torch 31 in the welding progress direction A (that is, the first electrode side). It is preferable to do. It is preferable to set the advance angle ⁇ to 20 ° or more because the effect of widening the bead width appears remarkably. If the advance angle is too large, the torch must be made very long. Therefore, when welding four or more electrodes, the advance angle of the third electrode 3 is preferably 30 ° or less due to equipment limitations.
- the example using three electrodes has been described above. However, the present invention is not limited to the number of electrodes, but can be applied to submerged arc welding using three or more electrodes, particularly 3 to 5 electrodes.
- the groove shape to which the present invention is applied is a two-stage groove in which two kinds of groove angles are combined.
- the groove angle on the bottom surface side of the steel plate 5 (hereinafter referred to as the bottom layer).
- Side groove angle) is ⁇ B
- surface layer side groove angle is ⁇ T.
- the bottom layer side groove angle ⁇ B is preferably in the range of 40 to 70 °.
- the surface layer side included angle theta T is less than 90 °, the effect of widening the bead width is small, it exceeds 120 °, too spread GMA width, easily undercut occurs. Therefore, the surface side groove angle ⁇ T is preferably in the range of 90 to 120 °.
- the depth of the portion of the bottom layer side groove angle ⁇ B of the two-step groove (hereinafter referred to as the bottom layer groove depth) is H B
- the portion of the portion of the surface layer side groove angle ⁇ T depth (hereinafter, referred to as the surface portion groove depth) as H T
- H B ⁇ H T the portion of the portion of the surface layer side groove angle ⁇ T depth
- the surplus height M can be reduced, Moreover, a wide bead width W can be obtained.
- the present invention can be applied to single-sided welding and double-sided welding, but when applied particularly to a thick steel plate having a thickness exceeding 30 mm, a deep penetration and a wide bead width can be obtained and welding can be performed. Since heat can be reduced, it is effective in improving the toughness of the heat-affected zone and preventing undercutting.
- a solid wire is generally used as a welding wire for submerged arc welding, but not only a solid wire but also a metal cored wire can be applied to the present invention.
- Table 1 shows the groove shape
- Table 2 shows the welding conditions
- Table 3 shows the electrode arrangement
- Table 4 shows the setting of the welding current.
- the invention example according to the present invention can achieve both deep penetration (18.4 to 22.2 mm) and wide bead width (24.4 to 30.6 mm) with low heat input.
- symbols 1 to 3, 13, and 14 have good bead appearance, no defects, and a low height (1.0 to 2.5 mm).
- Comparative Example 4 since the wire diameter of the first electrode was 1.6 mm, the penetration depth and the bead width were sufficient, but a high current could not be supplied and a deep penetration could not be obtained. . In symbol 5, since the wire diameter of the first electrode was 4.0 mm, a high current density could not be set and a deep penetration could not be obtained. Symbol 6 did not use a two-step groove and used a V groove, so a wide bead width could not be obtained.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
Abstract
Description
(1) 溶接進行方向の先頭の第1電極のワイヤ径が2.0~3.2mm、電流密度が145A/mm2以上であり、前記第1電極の後方に第2電極以降を1列に配置し、かつ被溶接鋼板に形成する開先の形状が、底層側開先角度をθB、表層側開先角度をθTとしてθB<θTを満足する2段開先である、3電極以上を用いた鋼板のサブマージアーク溶接方法。
以上に、3本の電極を用いる例について説明したが、本発明は電極数を3本に限定するものではなく、3本以上の電極を用いるサブマージアーク溶接に適用でき、とりわけ3~5本の電極を用いる場合に顕著な効果が得られる。6本以上の電極にすると溶接入熱が過大になり溶接熱影響部の靭性が劣化するおそれがあるので好ましいとはいえない。
なお、第3電極3の後方に第4電極以降を配置する場合は、ワイヤの鋼板表面における先端位置が溶接線6上に配置されるように一列に設定する。使用するワイヤのワイヤ径および前進角は上記の第3電極と同様とし、交流電流を供給することが好ましい。 次いで、図4,5を参照して、本発明を適用する開先形状、およびその開先形状から得られる溶接継手の形状について説明する。
11 第1電極のトーチ
12 第1電極のワイヤ
13 第1電極のワイヤの先端位置
2 第2電極
21 第2電極のトーチ
22 第2電極のワイヤ
23 第2電極のワイヤの先端位置
3 第3電極
31 第3電極のトーチ
32 第3電極のワイヤ
33 第3電極のワイヤの先端位置
5 鋼板
6 溶接線
Claims (6)
- 溶接進行方向の先頭の第1電極のワイヤ径が2.0~3.2mm、電流密度が145A/mm2以上であり、前記第1電極の後方に第2電極以降を1列に配置し、かつ被溶接鋼板に形成する開先の形状が、底層側開先角度をθB、表層側開先角度をθTとしてθB<θTを満足する2段開先である、3電極以上を用いた鋼板のサブマージアーク溶接方法。
- 前記底層側開先角度θBが40~70°であることを特徴とする請求項1に記載のサブマージアーク溶接方法。
- 前記表層側開先角度θTが120°以下であることを特徴とする請求項1または2に記載のサブマージアーク溶接方法。
- 前記開先の底層側開先角度θBの部位の深さをHB、表層側開先角度θTの部位の深さをHTとしてHB≧HTを満足することを特徴とする請求項1~3のいずれか一項に記載のサブマージアーク溶接方法。
- 前記第1電極に直流電流を供給し、前記第2電極以降に交流電流を供給することを特徴とする請求項1~4のいずれか一項に記載のサブマージアーク溶接方法。
- 前記第2電極以降のワイヤ径が3.2mm以上であることを特徴とする請求項1~5のいずれか一項に記載のサブマージアーク溶接方法。
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12853275.1A EP2786830B1 (en) | 2011-11-29 | 2012-11-28 | Submerged arc welding method for steel sheets |
KR1020147014225A KR20140094579A (ko) | 2011-11-29 | 2012-11-28 | 강판의 서브머지 아크 용접 방법 |
KR1020177003694A KR20170018972A (ko) | 2011-11-29 | 2012-11-28 | 강판의 서브머지 아크 용접 방법 |
US14/359,691 US20140346149A1 (en) | 2011-11-29 | 2012-11-28 | Submerged arc welding method for steel plate |
RU2014125804/02A RU2592335C2 (ru) | 2011-11-29 | 2012-11-28 | Способ дуговой сварки под флюсом для стальной пластины |
CN201280058087.7A CN103958109A (zh) | 2011-11-29 | 2012-11-28 | 钢板的埋弧焊方法 |
KR1020197011018A KR20190043638A (ko) | 2011-11-29 | 2012-11-28 | 강판의 서브머지 아크 용접 방법 |
JP2013546994A JP5772977B2 (ja) | 2011-11-29 | 2012-11-28 | 鋼板のサブマージアーク溶接方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011260265 | 2011-11-29 | ||
JP2011-260265 | 2011-11-29 |
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WO2013080523A1 true WO2013080523A1 (ja) | 2013-06-06 |
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ID=48535017
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2012/007610 WO2013080523A1 (ja) | 2011-11-29 | 2012-11-28 | 鋼板のサブマージアーク溶接方法 |
Country Status (7)
Country | Link |
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US (1) | US20140346149A1 (ja) |
EP (1) | EP2786830B1 (ja) |
JP (1) | JP5772977B2 (ja) |
KR (3) | KR20170018972A (ja) |
CN (2) | CN108788409A (ja) |
RU (1) | RU2592335C2 (ja) |
WO (1) | WO2013080523A1 (ja) |
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JP7485250B1 (ja) | 2023-02-24 | 2024-05-16 | Jfeスチール株式会社 | 片面サブマージアーク溶接方法および溶接継手の製造方法 |
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- 2012-11-28 RU RU2014125804/02A patent/RU2592335C2/ru active
- 2012-11-28 WO PCT/JP2012/007610 patent/WO2013080523A1/ja active Application Filing
- 2012-11-28 US US14/359,691 patent/US20140346149A1/en not_active Abandoned
- 2012-11-28 KR KR1020177003694A patent/KR20170018972A/ko active Search and Examination
- 2012-11-28 KR KR1020197011018A patent/KR20190043638A/ko not_active IP Right Cessation
- 2012-11-28 EP EP12853275.1A patent/EP2786830B1/en active Active
- 2012-11-28 KR KR1020147014225A patent/KR20140094579A/ko active Application Filing
- 2012-11-28 CN CN201810595184.9A patent/CN108788409A/zh active Pending
- 2012-11-28 JP JP2013546994A patent/JP5772977B2/ja active Active
- 2012-11-28 CN CN201280058087.7A patent/CN103958109A/zh active Pending
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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RU2706993C1 (ru) * | 2016-02-19 | 2019-11-21 | ДжФЕ СТИЛ КОРПОРЕЙШН | Многоэлектродная электродуговая сварка под флюсом |
CN113732552A (zh) * | 2020-05-27 | 2021-12-03 | 宝山钢铁股份有限公司 | 基于多丝埋弧焊的低碳微合金钢高热输入焊接性评估方法 |
CN113732552B (zh) * | 2020-05-27 | 2022-09-16 | 宝山钢铁股份有限公司 | 基于多丝埋弧焊的低碳微合金钢高热输入焊接性评估方法 |
JP7485250B1 (ja) | 2023-02-24 | 2024-05-16 | Jfeスチール株式会社 | 片面サブマージアーク溶接方法および溶接継手の製造方法 |
WO2024176507A1 (ja) * | 2023-02-24 | 2024-08-29 | Jfeスチール株式会社 | 片面サブマージアーク溶接方法および溶接継手 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2013080523A1 (ja) | 2015-04-27 |
KR20190043638A (ko) | 2019-04-26 |
EP2786830A4 (en) | 2016-04-20 |
US20140346149A1 (en) | 2014-11-27 |
CN103958109A (zh) | 2014-07-30 |
EP2786830B1 (en) | 2018-03-28 |
RU2592335C2 (ru) | 2016-07-20 |
EP2786830A1 (en) | 2014-10-08 |
RU2014125804A (ru) | 2015-12-27 |
KR20170018972A (ko) | 2017-02-20 |
CN108788409A (zh) | 2018-11-13 |
KR20140094579A (ko) | 2014-07-30 |
JP5772977B2 (ja) | 2015-09-02 |
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