CN102029457B - Vertical butt welding process of high-strength steel for ship structures - Google Patents
Vertical butt welding process of high-strength steel for ship structures Download PDFInfo
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Abstract
The invention particularly relates to a vertical butt welding process of high-strength steel for ships, and discloses a welding process in allusion to the vertical butt welding of EH3630mm steel plates of high-strength steel ship structures. In the welding process, effective specifications are provided to the groove welding, the preheating before the welding, the welding temperature, the welding sequence, the welding specification parameter and the cold treatment after the welding, so that the welding process of the ultra-thick high-strength steel can be realized smoothly, the labor efficiency is improved, the raw materials are saved, the production cost is reduced, the ship building period is decreased and the domestic technical specification blank in the vertical butt welding of the EH3630mm steel plates of the high-strength steel ship structures is made up.
Description
Technical field
The invention particularly relates to the upright butt welding welding procedure of high-strength steel peculiar to vessel.
Background technology
Solder technology is one of key process technology of modern ships work, and the Ship Welding quality is to estimate the important indicator of shipbuilding quality in hull construction.Therefore, the solder technology progress has crucial meaning to the development that promotes shipbuilding production.In the world, the high strength steel solder technology develops aspect wlding composition and technological design comparatively fast, and application is also in continuous expansion.Steel construction relating under special instructions for use or the bad working environments environment is made the field, and high strength steel occupies more and more important position, has been widely used in fields such as boats and ships, bridge, automobile, skyscraper construction.And domestic, the range of application of high-strength steel is also increasing gradually, but to use generally that is that all right ripe, only account for about 10% of the total consumption of steel, and ratio is less.Because high-strength steel intensity peculiar to vessel is high, can create conditions for practicing thrift steel and alleviating the Welding Structure deadweight, so adopt the high strength steel of function admirable can promote Ship Structure to develop to maximization, lightweight and high-effect direction, its development prospect is wide.And not forming certain welding procedure file as yet about the welding procedure of high-strength steel slab, the design studies of associated welds technology exists not enough." material and the welding conditions " that publish in July, 2009 of CCS (CCS), upright butt welding welding does not provide relevant technological specification for high-strength steel EH36 30mm sheet material.
Therefore carry out slab high strength steel welding procedure Study on Measures; Can promote company technique level and synthesized competitiveness; Reduce spillage of material, save operation, raise the efficiency, and can instruct site operation; As following process modification and shipowner and go into the foundation of grade department check, in technological design and actual production, erect bridge.This patent is studied for the upright butt welding welding procedure of high-strength steel EH36 30mm sheet material through changing technological measure.
Summary of the invention
Technical problem to be solved by this invention is to the upright butt welding of the high strength ship hull structure use steel of EH36 30mm; Provide a kind of high strength ship hull structure use steel to found the butt welding welding technique; More welding material, electric energy and man-hour can be saved; And be easy to processing, can effectively reduce welding deformation.
For solving the problems of the technologies described above, the present invention provides a kind of high strength ship hull structure use steel to found the butt welding welding technique, it is characterized in that, and be the upright butt welding of high strength ship hull structure use steel of EH36 30mm to mother metal, comprise following technological parameter and step:
Bevel for welding: adopt two V grooves, the butt joint bevel angle is 60 ° ± 5 °.
Preheat temperature: need before the welding to adopt in oxy-acetylene mode butt welded seam and the weld seam both sides 150mm scope to carry out preheating, preheat temperature reaches 80 ℃ and begins welding.
The welding temperature: during welding between the road temperature should be controlled at 50 ℃-150 ℃.At any time adopt some temperature meter to measure.
Welding sequence: adopt multilayer welding to fill up the groove in the cross section, after positive welding is accomplished, should workpiece be stood up, weld seam adopts the carbon arc air gouging back chipping, implements the reverse side welding again.
Welding material: adopt 3Y welding wire or welding rod with structural steel yield strength ad eundem.
Welding parameter: welding current 170～190A, arc voltage 26～28V, speed of welding 9～14cm/min, heat input 21～32KJ/cm, electrical characteristics are dc reverse connection.
Welding manner is a carbon dioxide gas arc welding.
Adopt multilayer welding to fill up the groove in the cross section during welding, prevent the generation of weld cracking or delayed crack, simultaneously, the process that preceding one weld seam is " preheating " to one weld seam in back; One weld seam in back is equivalent to the process of " after-baking " concerning preceding one weld seam, improved stress distribution in the welding process effectively, and welding condition such as electric current, voltage and speed of welding etc. have very big influence to thermal cycle.
Original welding principle technology only belongs to the position welding method from Ship Structure and sets about explaining the welding procedure problem; But do not refine to from ship steel own characteristic formation welding procedure; And characteristics such as the mechanical property of this patent foundation high-strength steel slab peculiar to vessel and chemical composition; Form its unique welding procedure, and sum up formation welding procedure file thus, can be used as the supplementary notes of welding principle technology.
Realize that through changing technological process thickness of slab is the upright butt welding welding procedure of carbon dioxide gas arc welding of the EH36 sheet material of 30mm; Through measures such as weldability test, qualifications of welding procedure; Make the upright butt welding welding scheme of carbon dioxide gas arc welding of high-strength steel EH3630mm; Can enhance productivity, reduce energy consumption, save raw material, reduce cost etc.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment technical scheme of the present invention is further specified.
Fig. 1 is the bevel for welding sketch map.
Fig. 2 is the welding sequence sketch map.
The specific embodiment
One, prepares before the weldering
1. before the welding, the welder should conscientiously be familiar with construction drawing and technology, and the specification requirement and the quality requirement of understanding product strictly observe process discipline and weld in strict accordance with the welding requirements of this technology.
2. check conscientiously whether groove size and assembly quality meet the quality standard requirement before the weldering.
In the groove and the positive and negative in each 30mm of bevelled edge both sides and end face should remove the residual sticking carbon of water stain, greasy dirt, iron rust, extension slag and carbon plane etc. to the influential foreign material of welding quality, paste ceramic backing again.
4. rain, snow sky are forbidden to weld in the open.When envionmental humidity greater than 90% the time, should take corresponding measure, otherwise forbid welding; Carbon dioxide gas arc welding should be taked draught exclusion device when wind speed during greater than 2m/s during welding.
Two, welding material and welding method
1. this material can adopt carbon dioxide gas arc welding to weld.
2. welding material adopts 3Y welding wire or the welding rod with structural steel yield strength ad eundem.
Three, welding procedure
1. the bevel for welding form is as shown in Figure 1:
2. need to adopt before the welding in oxy-acetylene mode butt welded seam and the weld seam both sides 150mm scope and carry out preheating, preheat temperature reaches 80 ℃ and begins welding, during welding between the road temperature should be controlled at 50 ℃-150 ℃.At any time adopt some temperature meter to measure.
3. when welding, should monitor, observe the welding deformation state at any time, if find welding deformation, then should stop welding, the adjustment welding sequence reduces welding deformation as far as possible.
4. after positive welding is accomplished, should workpiece be stood up, weld seam adopts the carbon arc air gouging back chipping, implements the reverse side welding again.
Four, postwelding cleaning and check
1. the postwelding welder should conscientiously remove the splash of weld seam welding slag and both sides.
2. after having welded, outward appearance and Non-Destructive Testing are carried out in welding.Specific requirement is carried out by relevant requirements.
3. reprocessing of weld defect need thoroughly be removed defective with carbon arc air gouging, removes the position and answers smooth transition.
Adopt carbon dioxide gas arc welding:
1, welding material is following: welding wire HTW-711 (E501T-1) Φ 1.2 carbon dioxide purity >=99.5%
2, welding sequence and groove yardstick are as shown in Figure 2.
3, welding variables sees the following form 1:
Table 1 welding variables
It should be noted last that; The above specific embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although with reference to preferred embodiment the present invention is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention; And not breaking away from the spirit and the scope of technical scheme of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (2)
1. the upright butt welding welding technique of high strength ship hull structure use steel is characterized in that, is the upright butt welding of high strength ship hull structure use steel of EH36 30mm to mother metal, comprises following technological parameter and step:
Bevel for welding: adopt double V-shaped groove, the butt joint bevel angle is 60 ° ± 5 °;
Preheat temperature: need before the welding to adopt in oxy-acetylene mode butt welded seam and the weld seam both sides 150mm scope to carry out preheating, preheat temperature reaches 80 ℃ and begins welding;
The welding temperature: during welding between the road temperature should be controlled at 50 ℃-150 ℃; At any time adopt some temperature meter to measure;
Welding sequence: adopt multilayer welding to fill up the groove in the cross section, after positive welding is accomplished, should workpiece be stood up, weld seam adopts the carbon arc air gouging back chipping, implements the reverse side welding again;
Welding material: adopt 3Y welding wire or welding rod with structural steel yield strength ad eundem;
Welding parameter: welding current 170～190A, arc voltage 26～28V, speed of welding 9～14 cm/min, heat input 21～32KJ/cm, electrical characteristics are dc reverse connection.
2. high strength ship hull structure use steel according to claim 1 founds the butt welding welding technique, it is characterized in that welding manner is a carbon dioxide gas arc welding.
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| CN 201010568444 CN102029457B (en) | 2010-12-01 | 2010-12-01 | Vertical butt welding process of high-strength steel for ship structures |
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| CN 201010568444 CN102029457B (en) | 2010-12-01 | 2010-12-01 | Vertical butt welding process of high-strength steel for ship structures |
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| CN102029457B true CN102029457B (en) | 2012-10-03 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102909456B (en) * | 2012-10-31 | 2014-04-23 | 南通港闸船舶制造有限公司 | Dredger welding method |
| CN103273209A (en) * | 2013-06-05 | 2013-09-04 | 天顺风能(苏州)股份有限公司 | Welding process of outside wind tower U-shaped grooves |
| CN104676236B (en) * | 2013-11-27 | 2017-08-15 | 江南造船(集团)有限责任公司 | The welding method of double bulb flat-bulb steel components |
| JP6232643B2 (en) | 2014-06-05 | 2017-11-22 | 日立建機株式会社 | Boom for construction machinery |
| CN104801821B (en) * | 2014-07-23 | 2017-02-15 | 烟台中集来福士海洋工程有限公司 | Steel plate butt welding method |
| CN104646803B (en) * | 2015-02-15 | 2016-09-21 | 中船桂江造船有限公司 | Low alloy steel plate and the welding method of ship plate |
| CN105234525B (en) * | 2015-10-27 | 2017-09-29 | 武昌船舶重工集团有限公司 | A kind of hull structural steel founds butt welding method with forged steel |
| CN105436659B (en) * | 2016-01-08 | 2017-11-17 | 招商局重工（江苏）有限公司 | The technique that a kind of pile legs of self-elevating drilling platform rack renews |
| CN106312269B (en) * | 2016-10-13 | 2018-11-23 | 广西大学 | A kind of welding method of boiler medium plate |
| CN113843483B (en) * | 2021-10-21 | 2023-02-17 | 江南造船(集团)有限责任公司 | Welding process of low-alloy high-strength steel for ship pod propeller |
| CN115415643B (en) * | 2022-09-23 | 2023-11-03 | 南京钢铁股份有限公司 | Welding method of carbon-manganese low-temperature steel for VLGC ship |
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| CN1490118A (en) * | 2003-07-29 | 2004-04-21 | 沪东中华造船(集团)有限公司 | Vertical welding method for high-strength superthick structural steel board |
| CN101564785A (en) * | 2008-04-25 | 2009-10-28 | 中国海洋石油总公司 | Double wire automatic submerged arc welding process |
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| WO2008031210A1 (en) * | 2006-09-15 | 2008-03-20 | Algoma Steel Inc. | Method for manufacturing a welded assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1490118A (en) * | 2003-07-29 | 2004-04-21 | 沪东中华造船(集团)有限公司 | Vertical welding method for high-strength superthick structural steel board |
| CN101564785A (en) * | 2008-04-25 | 2009-10-28 | 中国海洋石油总公司 | Double wire automatic submerged arc welding process |
Non-Patent Citations (2)
| Title |
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| 方克.EH36船用高强度钢的焊接工艺.《机电技术》.2003,(第2期),第46页左栏第1-6段. * |
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Inventor after: Wang Yu Inventor after: Yan Jun Inventor after: Cai Dian Inventor after: Liang Tianshan Inventor after: Zhang Yadong Inventor after: Fan Wei Inventor after: Cao Nan Inventor after: Wang Tao Inventor before: Fan Wei Inventor before: Yan Jun Inventor before: Wang Yu Inventor before: Wang Bo Inventor before: Zhang Lijie |
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Owner name: WUCHANG SHIPBUILDING INDUSTRY GROUP CO., LTD. Free format text: FORMER NAME: WUCHANG SHIPBUILDING INDUSTRY CO., LTD. |
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Address after: 430060 Hubei city of Wuhan province Wuchang Ziyang Road No. 2 Patentee after: WUCHANG SHIPBUILDING INDUSTRY GROUP CO., LTD. Address before: 430060 Hubei city of Wuhan province Wuchang Ziyang Road No. 2 Patentee before: Wuchang Shipbuilding Industry Co., Ltd. |