CN102029458A - Butt welding technique of steel crossbar for high-strength ship body structure - Google Patents
Butt welding technique of steel crossbar for high-strength ship body structure Download PDFInfo
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Abstract
The invention relates to a butt welding technique of a high-strength steel crossbar for a ship. Aiming at cross butt welding of a high-strength steel ship body structure with base metal of EH3630mm, the invention provides a welding technique which has the effective specifications of bevel for welding, preheating before welding, welding temperature, welding sequence, welding specification parameters and cold treatment after welding, so that the welding technique of high-strength steel of ultra-thick plates can be realized smoothly, the labor efficiency is improved, the raw materials are saved, the production cost is reduced, the construction period of the ship is shortened, and the technical specification blank of the butt welding technique part of the steel crossbar for EH3630mm high-strength ship body structure in China is filled.
Description
Technical field
The present invention relates to the horizontal butt joint welding procedure of high-strength steel peculiar to vessel.
Background technology
Solder technology is one of key process technology of modern ships construction engineering, 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.Make the field at the steel construction that relates under special instructions for use or the bad working environments environment, 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.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), horizontal butt welding welding does not provide relevant technological specification for the thick EH36 high-strength steel of 30mm.
Because high-strength steel intensity height peculiar to vessel can create conditions for saving 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.Therefore carry out slab high strength steel welding procedure Study on Measures, can promote company's technical merit and synthesized competitiveness, reduce spillage of material, save operation, increase work efficiency, be convenient to carrying out smoothly, reducing production costs of welding procedure, 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.
The present invention studies for the horizontal butt welding welding procedure of the thick EH36 high-strength steel of 30mm through changing technological measure.
Summary of the invention
Technical problem to be solved by this invention provides the horizontal butt welding welding technique of a kind of high strength ship hull structure use steel, the horizontal butt welding of high strength ship hull structure use steel at EH36 30mm, 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 invention provides the horizontal butt welding welding technique of a kind of high strength ship hull structure use steel, it is characterized in that, be the horizontal butt welding of high strength ship hull structure use steel of EH36 30mm at mother metal, comprise following technological parameter and step:
Bevel for welding: be double-V groove, bevel angle is 50 ° ± 5 °;
Preheat temperature: need before the welding to adopt in oxyacetylene torch mode butt welded seam and the weld seam both sides 150mm scope and carry out preheating, preheat temperature reaches 80 ℃ and begins welding;
The welding temperature: during welding between the road temperature should be no more than 150 ℃, adopt some temperature meter to measure at any time;
Welding sequence: adopt multi-pass welding, to fill up the groove in the cross section;
Welding material: adopt 3Y welding wire or welding rod with structural steel yield strength ad eundem;
Welding parameter: welding current 190～220A, arc voltage 22～26V, speed of welding 21～38cm/min, heat input 7～13KJ/cm, electrical characteristics are dc reverse connection;
Welding manner is a carbon dioxide gas arc welding.
Adopt multi-pass welding to connect the groove that can fill up in the cross section during welding, prevent the generation of weld cracking or delayed crack, simultaneously, the process that preceding one weld seam is one " 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, improve stress distribution in the welding process effectively, be beneficial to the assurance welding quality; Welding condition such as electric current, voltage and speed of welding etc. have very big influence to thermal cycle.
Original welding principle technology only sets about illustrating the welding procedure problem from position, Ship Structure place welding method, 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 by changing technological process thickness of slab is the horizontal butt welding welding procedure of carbon dioxide gas arc welding of the EH36 sheet material of 30mm; by measures such as weldability test, qualifications of welding procedure; make the CO 2 gas-shielded horizontal butt welding welding scheme of high-strength steel EH36 30mm; can enhance productivity; reduce energy consumption, save raw material etc.
Description of drawings
Below in conjunction with the drawings and specific embodiments technical scheme of the present invention is further described in detail.
Fig. 1 is the bevel for welding schematic diagram.
Fig. 2 is for welding sequential schematic on bevel for welding.
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.
3. remove in the groove earlier and each 30mm of bevelled edge both sides in positive and negative and end face on the residual sticking carbon of water stain, greasy dirt, iron rust, dross 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 in oxyacetylene torch mode butt welded seam and the weld seam both sides 150mm scope and carry out preheating before the welding, preheat temperature reaches 80 ℃ and begins welding, during welding between the road temperature should be no more than 150 ℃.At any time adopt some temperature meter to measure.
3. when welding, should monitor, observe the welding deformation state at any time,, then should stop welding, adjust welding sequence, reduce welding deformation as far as possible if find that welding deformation is too much.
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, butt welded seam carries out outward appearance and Non-Destructive Testing.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.
4. all are reprocessed weld seam and should all carry out visual examination and corresponding Non-Destructive Testing.Welding quality should meet the requirement of acceptance criteria.
Embodiment 1
Adopt carbon dioxide gas arc welding:
1, welding material is as follows: 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 the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (2)
1. the horizontal butt welding welding technique of high strength ship hull structure use steel is characterized in that, is the horizontal butt welding welding of high strength ship hull structure use steel of EH36 30mm at mother metal, comprises following technological parameter and step:
Bevel for welding: be double-V groove, bevel angle is 50 ° ± 5 °;
Preheat temperature: need before the welding to adopt in oxyacetylene torch mode butt welded seam and the weld seam both sides 150mm scope and carry out preheating, preheat temperature reaches 80 ℃ and begins welding;
The welding temperature: during welding between the road temperature should be no more than 150 ℃, adopt some temperature meter to measure at any time;
Welding sequence: adopt multi-pass welding, to fill up the groove in the cross section;
Welding material: adopt 3Y welding wire or welding rod with structural steel yield strength ad eundem;
Welding parameter: welding current 190～220A, arc voltage 22～26V, speed of welding 21～38 cm/min, heat input 7～13 KJ/cm, electrical characteristics are dc reverse connection.
2. the horizontal butt welding welding technique of high strength ship hull structure use steel according to claim 1 is characterized in that welding manner is a carbon dioxide gas arc welding.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010568689 CN102029458B (en) | 2010-12-01 | 2010-12-01 | Butt welding technique of steel crossbar for high-strength ship body structure |
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| CN 201010568689 CN102029458B (en) | 2010-12-01 | 2010-12-01 | Butt welding technique of steel crossbar for high-strength ship body structure |
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| CN102029458A true CN102029458A (en) | 2011-04-27 |
| CN102029458B CN102029458B (en) | 2012-10-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104676236A (en) * | 2013-11-27 | 2015-06-03 | 江南造船(集团)有限责任公司 | Double-bulb flat-bulb steel component and welding method thereof |
| CN107584194A (en) * | 2017-11-01 | 2018-01-16 | 上海沪东三造船舶配套有限公司 | The welding method of high intensity crack arrest steel |
| CN112925289A (en) * | 2021-01-20 | 2021-06-08 | 大连海事大学 | Intelligent shipbuilding inspection and test system of wisdom shipyard |
Citations (3)
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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 |
| WO2008031210A1 (en) * | 2006-09-15 | 2008-03-20 | Algoma Steel Inc. | Method for manufacturing a welded assembly |
| 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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2010
- 2010-12-01 CN CN 201010568689 patent/CN102029458B/en active Active
Patent Citations (3)
| 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 |
| WO2008031210A1 (en) * | 2006-09-15 | 2008-03-20 | Algoma Steel Inc. | Method for manufacturing a welded assembly |
| 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 |
|---|
| 《机电技术》 20030228 方克 EH36船用高强度钢的焊接工艺 第46页左栏第1-6段 1-2 , 第2期 2 * |
| 《机电技术》 20070228 黄增忠 船体EH36高强度钢焊接工艺认可试验 第77页左栏第1段-第78页左栏第6段，图1-2 1-2 , 第2期 2 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104676236A (en) * | 2013-11-27 | 2015-06-03 | 江南造船(集团)有限责任公司 | Double-bulb flat-bulb steel component and welding method thereof |
| 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 |
| CN107584194A (en) * | 2017-11-01 | 2018-01-16 | 上海沪东三造船舶配套有限公司 | The welding method of high intensity crack arrest steel |
| CN112925289A (en) * | 2021-01-20 | 2021-06-08 | 大连海事大学 | Intelligent shipbuilding inspection and test system of wisdom shipyard |
| CN112925289B (en) * | 2021-01-20 | 2022-03-11 | 大连海事大学 | Intelligent shipbuilding inspection and test system of wisdom shipyard |
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| CN102029458B (en) | 2012-10-10 |
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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. |
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Effective date of registration: 20170614 Address after: 430060 Hubei Province, Wuhan city Wuchang District Ziyang Road No. 2 Patentee after: Wuhan Wuchuan Measurement & Test Co., Ltd. Address before: 430060 Hubei city of Wuhan province Wuchang Ziyang Road No. 2 Patentee before: WUCHANG SHIPBUILDING INDUSTRY GROUP CO., LTD. |