CN105195861A - Overhead-butt-joint welding method for hull structural steel and forged steel - Google Patents
Overhead-butt-joint welding method for hull structural steel and forged steel Download PDFInfo
- Publication number
- CN105195861A CN105195861A CN201510708085.3A CN201510708085A CN105195861A CN 105195861 A CN105195861 A CN 105195861A CN 201510708085 A CN201510708085 A CN 201510708085A CN 105195861 A CN105195861 A CN 105195861A
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- welding
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- groove
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- forged
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Classifications
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- 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
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
-
- 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
- B23K9/02—Seam welding; Backing means; Inserts
-
- 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
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/035—Seam welding; Backing means; Inserts with backing means disposed under the seam
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Arc Welding In General (AREA)
Abstract
The invention relates to an overhead-butt-joint welding method for hull structural steel and forged steel, and belongs to methods for welding high-strength steel materials. The problems of low weld joint strength and large workload existing in an existing overhead-butt-joint welding method for high-strength structural steel and high-strength forged steel are solved. The overhead-butt-joint welding method includes the steps of groove forming, single side bead welding, preheating and welding. Machining is easy, welding deformation is effectively reduced, overhead-butt-joint welding of special steel 902 and forged steel SA508-3 is smoothly achieved and passes a weldability test and welding procedure qualification, labor efficiency can be improved, welding materials, electric energy and labor hour can be saved, the production cost is reduced, the shipbuilding cycle is shortened, and the blank of welding ship structural steel and forged steel in China is filled up.
Description
Technical field
The invention belongs to the welding method between high strength steel material, be specifically related to a kind of hull structural steel and face upward with forged steel and dock welding method.
Background technology
Solder technology is that modern ships builds one of key process technology of engineering, and in hull construction, Ship Welding quality evaluates the important indicator of shipbuilding quality.Relating to the manufacture of steel structure field under Special use requirement and bad working environments condition (as radiation parameter), high strength steel occupies more and more important position, the field such as extensive use boats and ships, bridge, petrochemical industry, Construction of highrise buildings, construction of nuclear power station.In the world, high strength steel solder technology develops comparatively fast in wlding composition and technological design, and application is also in continuous expansion.The range of application of domestic high strength steel is also expanding gradually, but generally also immature, only account for about 10% of steel consumption, ratio is less.At present, in standard GB/T 1499.2-2007, the intensity of high strength steel is 400MPa, existing high-strength structure steel and high strength forgings are faced upward docking welding method and are mainly adopted manual electric arc welding, for ensureing welding quality, the austenitic stainless steel wlding that general employing intensity is lower, opening one side groove, back root cleaning; But adopt the austenitic stainless steel wlding that intensity is lower, weld strength is lower than mother metal, and weld strength does not meet designing requirement, need all to need welding on the two sides of mother metal, the workload of welding is larger.
Summary of the invention
The invention provides a kind of steel for ship structure to face upward with forged steel and dock welding method, solve existing high-strength structure steel and high strength forgings and face upward weld strength low, the welding job amount larger problem of docking existing for welding method, butt welding is faced upward for special 902 steel of mother metal and SA508-3 forged steel, to save welding material, electric energy and man-hour, and be easy to processing, effectively reduce welding deformation.
A kind of steel for ship structure provided by the present invention is faced upward with forged steel and is docked welding method, it is characterized in that, comprises the steps:
(1) groove step is formed: form groove at special 902 steel and SA508-3 forged steel docking site respectively, do not stay root, groove angle of inclination, both sides is symmetrical, single V-arrangement butting grooves is jointly formed during docking, butting grooves angle is 50 ° ~ 60 °, the part that special 902 steel sides are thicker than SA508-3 forged steel is cut tiltedly, makes butting grooves both sides contour;
(2): SA508-3 forged steel groove region is preheated to 80 DEG C ~ 120 DEG C, then adopt the CHE58-1HR welding rod of manual electric arc welding and φ 4mm in the enterprising windrow weldering of SA508-3 forged steel groove, overlay cladding profile is consistent with groove, and thickness is 30mm ± 2mm; Described CHE58-1HR welding rod and special 902 steel yield strength ad eundems;
(3) preheating step: by special 902 steel and the single V-arrangement butting grooves of the common formation of both sides, SA508-3 forged steel docking site groove docking, butting grooves groove gap 6mm ± 2mm, butting grooves angle is 50 ° ~ 60 °, and the groove back side is provided with the Q345R steel sleeve of thickness 4mm ~ 6mm; Then carry out preheating within the scope of butt welded seam and weld seam both sides 150mm, preheat temperature reaches 80 ~ 120 DEG C and starts welding;
(4) welding step: adopt the manual electric arc welding of multilayer multiple tracks, to fill up the groove in interface, welding material adopts CHE58-1HR welding rod; During welding, between road, temperature controls at 80 DEG C ~ 120 DEG C.
Described steel for ship structure is faced upward with forged steel and is docked welding method, it is characterized in that:
In described one-sided built-up welding step, welding current 120A ~ 130A, arc voltage 21V ~ 23V, speed of welding 10cm/min ~ 18cm/min.
Described steel for ship structure is faced upward with forged steel and is docked welding method, it is characterized in that:
In described welding step, the 1st layer, the 2nd layer backing welding adopts φ 3.2mmCHE58-1HR welding rod, welding current 100A ~ 120A, arc voltage 20V ~ 22V, speed of welding 10cm/min ~ 18cm/min;
Other layer of backing welding and the weldering of capping layer adopt φ 4.0mmCHE58-1HR welding rod, welding current 120A ~ 130A, arc voltage 21V ~ 23V, speed of welding 10cm/min ~ 18cm/min.
Described steel for ship structure is faced upward with forged steel and is docked welding method, it is characterized in that:
In described one-sided built-up welding step and welding step, need to cure 1 ~ 2 hour through 380 ~ 400 DEG C before involved welding rod weldering, put into heat-preserving container ready access upon use, the welding rod do not used after 4 hours should take out and again cure, and the number of times again cured is no more than 2 times.
Because the intensity of SA508-3 forged steel is higher than special 902 steel, two kinds of steel directly weld rear SA508-3 forged steel side and easily produce cold crack, so the present invention adopts the CHE58-1HR welding rod strong with special 902 steel etc. to form changeover portion in the built-up welding of SA508-3 forged steel groove in one-sided built-up welding step, thus ensure welding of SA508-3 forged steel and special 902 steel, avoid the generation of cold crack, in turn ensure that the intensity of weld seam is not less than mother metal; In preheating step, carry out weld preheating to eliminate hydrogen induced cracking, meanwhile, have employed the method adding steel sleeve bottom groove, to reach the effect of manual electric arc welding single face welding and double face shaping, thus decrease welding job amount; In welding step, the groove in cross section cannot be filled up due to single-pass welding, therefore adopt multi-pass welding to fill up the groove in cross section, to prevent the generation of weld cracking and delayed crack, meanwhile, front one weld seam is rear one weld seam " preheating " process, rear one weld seam is front one weld seam " annealing " process, effectively can eliminate welding stress, be beneficial to guarantee welding quality, bevel for welding and welding condition welding quality have a great impact.
The present invention is easy to processing, effectively reduce welding deformation, achieve special 902 steel smoothly to face upward to dock with SA508-3 forged steel and weld, have passed weldability test, qualification of welding procedure, can raise labour efficiency, save welding material, electric energy and man-hour, reduce production cost, reduce ship building period, fill up the blank that domestic boats and ships structural steel welds with high strength forgings.
Accompanying drawing explanation
Fig. 1 is bevel for welding yardstick schematic diagram;
Fig. 2 is welding sequence schematic diagram in welding step.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described.
Embodiment 1, comprises the steps:
(1) groove step is formed: as shown in Figure 1, groove is formed respectively at special 902 steel of thickness 40mm and the SA508-3 forged steel docking site of thickness 30mm, do not stay root, groove angle of inclination, both sides is symmetrical, jointly form single V-arrangement butting grooves during docking, butting grooves angle is 51 °, and the part that special 902 steel sides are thicker than SA508-3 forged steel is cut tiltedly, cut plagioclase degree 50mm, make butting grooves both sides contour; End face in groove and in each 50mm in groove both sides should remove the influential foreign material of welding quality such as water stain, greasy dirt, iron rust, dross;
(2) one-sided built-up welding step: SA508-3 forged steel groove region is preheated to 120 DEG C, adopt the CHE58-1HR welding rod of manual electric arc welding and φ 4mm in the enterprising windrow weldering of SA508-3 forged steel groove again, overlay cladding profile is consistent with groove, and thickness is 30mm ± 2mm; Described CHE58-1HR welding rod and special 902 steel yield strength ad eundems;
Welding current 120A ~ 130A, arc voltage 21V ~ 23V, speed of welding 10cm/min ~ 18cm/min;
(3) preheating step: as shown in Figure 1, by special 902 steel and the single V-arrangement butting grooves of the common formation of both sides, SA508-3 forged steel docking site groove docking, butting grooves groove gap 8mm, butting grooves angle is 51 °, and the groove back side is provided with the Q345R steel sleeve of thickness 6mm; Then carry out preheating within the scope of butt welded seam and weld seam both sides 150mm, preheat temperature reaches 120 DEG C and starts welding;
(4) welding step: adopt the manual electric arc welding of multilayer multiple tracks, to fill up the groove in interface, welding material adopts CHE58-1HR welding rod; During welding, between road, temperature controls at 120 DEG C, in welding process, adopts infrared ray point thermometer to carry out monitoring temperature at any time;
As shown in Figure 2, the 1st layer, the 2nd layer backing welding adopts φ 3.2mmCHE58-1HR welding rod, welding current 100A ~ 120A, arc voltage 20V ~ 22V, speed of welding 10cm/min ~ 18cm/min;
3rd ~ 10 layers of backing welding and the 11st, 12 layer of capping layer weldering adopt φ 4.0mmCHE58-1HR welding rod, welding current 120A ~ 130A, arc voltage 21V ~ 23V, speed of welding 10cm/min ~ 18cm/min.
Embodiment 2, identical with the step of embodiment 1, difference is only the technological parameter in each step:
Formed in groove step, butting grooves angle is 60 °, cuts plagioclase degree 45mm;
In one-sided built-up welding step, be preheated to 80 DEG C;
Preheating step butting grooves groove gap 4mm, butting grooves angle is 60 °, is provided with the Q345R steel sleeve of thickness 4mm; Preheat temperature reaches 80 DEG C and starts welding;
In welding step, during welding, between road, temperature controls at 80 DEG C.
In the one-sided built-up welding step of the various embodiments described above and welding step, need to cure 1 ~ 2 hour through 380 ~ 400 DEG C before involved welding rod weldering, put into heat-preserving container ready access upon use, the welding rod do not used after 4 hours should take out and again cure, and the number of times again cured is no more than 2 times.
Above specific embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical scheme of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (4)
1. steel for ship structure is faced upward with forged steel and is docked a welding method, it is characterized in that, comprises the steps:
(1) groove step is formed: form groove at special 902 steel and SA508-3 forged steel docking site respectively, do not stay root, groove angle of inclination, both sides is symmetrical, single V-arrangement butting grooves is jointly formed during docking, butting grooves angle is 50 ° ~ 60 °, the part that special 902 steel sides are thicker than SA508-3 forged steel is cut tiltedly, makes butting grooves both sides contour;
(2) one-sided built-up welding step: SA508-3 forged steel groove region is preheated to 80 DEG C ~ 120 DEG C, adopt the CHE58-1HR welding rod of manual electric arc welding and φ 4mm in the enterprising windrow weldering of SA508-3 forged steel groove again, overlay cladding profile is consistent with groove, and thickness is 30mm ± 2mm; Described CHE58-1HR welding rod and special 902 steel yield strength ad eundems;
(3) preheating step: by special 902 steel and the single V-arrangement butting grooves of the common formation of both sides, SA508-3 forged steel docking site groove docking, butting grooves groove gap 6mm ± 2mm, butting grooves angle is 50 ° ~ 60 °, and the groove back side is provided with the Q345R steel sleeve of thickness 4mm ~ 6mm; Then carry out preheating within the scope of butt welded seam and weld seam both sides 150mm, preheat temperature reaches 80 ~ 120 DEG C and starts welding;
(4) welding step: adopt the manual electric arc welding of multilayer multiple tracks, to fill up the groove in interface, welding material adopts CHE58-1HR welding rod; During welding, between road, temperature controls at 80 DEG C ~ 120 DEG C.
2. steel for ship structure as claimed in claim 1 is faced upward with forged steel and is docked welding method, it is characterized in that:
In described one-sided built-up welding step, welding current 120A ~ 130A, arc voltage 21V ~ 23V, speed of welding 10cm/min ~ 18cm/min.
3. steel for ship structure as claimed in claim 1 is faced upward with forged steel and is docked welding method, it is characterized in that:
In described welding step, the 1st layer, the 2nd layer backing welding adopts φ 3.2mmCHE58-1HR welding rod, welding current 100A ~ 120A, arc voltage 20V ~ 22V, speed of welding 10cm/min ~ 18cm/min;
Other layer of backing welding and the weldering of capping layer adopt φ 4.0mmCHE58-1HR welding rod, welding current 120A ~ 130A, arc voltage 21V ~ 23V, speed of welding 10cm/min ~ 18cm/min.
4. the steel for ship structure as described in claim 1,2 or 3 is faced upward with forged steel and is docked welding method, it is characterized in that:
In described one-sided built-up welding step and welding step, need to cure 1 ~ 2 hour through 380 DEG C ~ 400 DEG C before involved welding rod weldering, put into heat-preserving container ready access upon use, the welding rod do not used after 4 hours should take out and again cure, and the number of times again cured is no more than 2 times.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510708085.3A CN105195861B (en) | 2015-10-27 | 2015-10-27 | A kind of hull structural steel faces upward butt welding method with forged steel |
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| CN201510708085.3A CN105195861B (en) | 2015-10-27 | 2015-10-27 | A kind of hull structural steel faces upward butt welding method with forged steel |
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| CN105195861A true CN105195861A (en) | 2015-12-30 |
| CN105195861B CN105195861B (en) | 2017-08-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111360366A (en) * | 2020-03-24 | 2020-07-03 | 江苏省沙钢钢铁研究院有限公司 | Welding method of full penetration overhead plate |
| CN113894392A (en) * | 2021-09-30 | 2022-01-07 | 北京博清科技有限公司 | Welding process method for overhead welding and bottoming |
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| CA2509322A1 (en) * | 2004-06-11 | 2005-12-11 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Dissimilar material weld joint formed by joining iron type material and aluminum type material, and weld joining method |
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| CN102019481A (en) * | 2010-11-30 | 2011-04-20 | 武昌船舶重工有限责任公司 | Plain butt welding process for high-strength hull structural steel |
| CN104014909A (en) * | 2014-06-24 | 2014-09-03 | 中国华冶科工集团有限公司 | Pipeline welding method |
| CN104801839A (en) * | 2015-04-01 | 2015-07-29 | 中石化工建设有限公司 | Welding technology of austenitic stainless steel and chrome molybdenum heat resistant steel |
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2015
- 2015-10-27 CN CN201510708085.3A patent/CN105195861B/en active Active
Patent Citations (7)
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| JPS5161473A (en) * | 1974-11-27 | 1976-05-28 | Nippon Kokan Kk | Kosokukonoritsugasushiirudoaakuyosetsunyoru atsunikuteionyokochoryokukokanno seizoho |
| CA2509322A1 (en) * | 2004-06-11 | 2005-12-11 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Dissimilar material weld joint formed by joining iron type material and aluminum type material, and weld joining method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111360366A (en) * | 2020-03-24 | 2020-07-03 | 江苏省沙钢钢铁研究院有限公司 | Welding method of full penetration overhead plate |
| CN113894392A (en) * | 2021-09-30 | 2022-01-07 | 北京博清科技有限公司 | Welding process method for overhead welding and bottoming |
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| CN105195861B (en) | 2017-08-25 |
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