CN105195858A - Flat-angle welding method for hull structural steel - Google Patents
Flat-angle welding method for hull structural steel Download PDFInfo
- Publication number
- CN105195858A CN105195858A CN201510708325.XA CN201510708325A CN105195858A CN 105195858 A CN105195858 A CN 105195858A CN 201510708325 A CN201510708325 A CN 201510708325A CN 105195858 A CN105195858 A CN 105195858A
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- welding
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- corner connection
- structural steel
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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
-
- 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
- B23K9/095—Monitoring or automatic control of welding parameters
-
- 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
- B23K9/235—Preliminary treatment
-
- 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
Abstract
The invention relates to a flat-angle welding method for hull structural steel, and belongs to welding methods for hull structural steel. The problems that an existing flat-angle welding method for hull structural steel is bad for base material corrosion prevention, and weld joints are low in strength are solved. The flat-angle welding method includes the steps of groove forming, preheating, front face welding, postweld treatment on the front face, back gouging, back face welding and postweld treatment on the back face. Machining is easy, welding deformation is effectively reduced, flat-angle welding for the hull structural steel 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 of steel for ship structure, be specifically related to a kind of steel for ship structure straight angle and connect 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.Therefore, solder technology progress is of great significance the development tool promoting shipbuilding production.In the world, high strength steel solder technology develops comparatively fast in wlding composition and technological design, and application is also in continuous expansion.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.And domestic, the range of application of 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 300MPa, and the welding standard of high strength steel is not perfect, the design studies Shortcomings of associated welds technique.
The existing high-strength structure steel straight angle connects welding method and mainly adopts manual electric arc welding, for ensureing welding quality, reduces the generation of the great weld defects such as cold crack, the austenitic stainless steel wlding that general employing intensity is lower; 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, for the structure with contact with sea water, can produce potential difference between weld seam and mother metal, be unfavorable for the anticorrosion of mother metal.
For ease of understanding the present invention, below relational term is explained:
When carrying out the straight angle and connecing welding, a steel part is welded in the steel piece surface of another root not movement, the steel part of not movement is called basic part, and mobile steel part is called workpiece, and generally groove is opened on workpiece, and certain angle corner connection pressed by workpiece and basic part.
The straight angle connects welding and refers to basic part placement parallel with workpiece general horizontal, and side, thickness of workpiece direction is welded at an angle with basic part surface.
The vertical toe of weld height of weld seam refers to the height of weld seam relative to basic part surface, and the horizontal toe of weld height of weld seam refers to the height of weld seam relative to surface of the work.
Summary of the invention
The invention provides a kind of steel for ship structure straight angle and connect welding method, solve the existing steel for ship structure straight angle connect weld strength existing for welding method low, be unfavorable for mother metal corrosion-resistant problem, to save more welding material, electric energy and man-hour, and be easy to processing, effectively reduce welding deformation.
A kind of steel for ship structure straight angle provided by the present invention connects welding method, comprises the steps:
(1) groove step is formed: form single V-arrangement bevel groove at workpiece corner connection position to be welded, stay root δ/3 ± 2mm, wherein workpiece thickness of slab δ >=30mm, bevel groove is 50 ° ~ 55 ° relative to basic part surface angle;
(2) preheating step: by workpiece to be welded and basic part corner connection, forms single V-arrangement corner connection groove, and corner connection bevel angle is 50 ° ~ 55 °, corner connection groove gap 0mm ~ 1mm; Then carry out preheating within the scope of diametrical connection groove and both sides 150mm thereof, preheat temperature reaches 100 DEG C ~ 130 DEG C and starts welding;
(3) front welding step: adopt the manual electric arc welding of multilayer multiple tracks, to fill up the bevel groove at corner connection position, welding material adopts the welding rod matched with basic part yield strength; During welding, between road, temperature controls at 100 DEG C ~ 130 DEG C;
(4) face bonding post-processing step: judge whether that environment temperature is 5 DEG C ~ 30 DEG C and relative humidity is less than 70%, go to step (5), otherwise heat within the scope of weld seam and weld seam both sides 150mm, heating-up temperature reaches 200 DEG C ~ 250 DEG C, be incubated 2 hours or more, then adopt sheet asbestos to cover weldment to make it to slowly cool to room temperature, then carry out step (5);
(5) back gouging step: first adopt φ 10mm carbon-point butt welded seam back side gouge back chipping, forms circular arc groove; Then carry out preheating within the scope of circular arc groove and both sides 150mm thereof, preheat temperature reaches 100 DEG C ~ 130 DEG C, carries out step (6);
(6) back side welding step: adopt the manual electric arc welding of multilayer multiple tracks, to fill up the circular arc groove at corner connection position, welding material adopts the welding rod matched with basic part yield strength; During welding, between road, temperature controls at 100 DEG C ~ 130 DEG C;
(7) back side after welding treatment step: judging whether that environment temperature is 5 DEG C ~ 30 DEG C and relative humidity is less than 70%, is terminate; Otherwise heat within the scope of weld seam and weld seam both sides 150mm, heating-up temperature reaches 200 DEG C ~ 250 DEG C, be incubated 2 hours or more, then adopt sheet asbestos to cover weldment and make it to slowly cool to room temperature, terminate.
The described steel for ship structure straight angle connects welding method, it is characterized in that:
Described front is welded and in the welding step of the back side, is adopted φ 4.0mm welding rod, welding current 165A ~ 175A, arc voltage 23V ~ 25V, speed of welding 10cm/min ~ 18cm/min.
The described steel for ship structure straight angle connects welding method, it is characterized in that:
Described front is welded and in the welding step of the back side, 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.
The present invention, in front welding and back side welding step, adopts the ferrite wlding mated with high-strength structure steel, ensure that the intensity of weld seam is not less than mother metal; Weld preheating is to eliminate the hydrogen induced cracking that may occur, the groove in cross section cannot be filled up due to single-pass welding during 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, and rear one weld seam is front one weld seam " annealing " process, effectively can eliminate welding stress, be beneficial to guarantee welding quality; Environmental condition do not reach require time, by post weld heat treatment, eliminate the cold crack that steel for ship structure weld seam may occur.
The present invention is easy to processing, effectively reduce welding deformation, achieve the steel for ship structure straight angle smoothly and connect welding, 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 the domestic steel for ship structure straight angle connects welding.
Accompanying drawing explanation
Fig. 1 is workpiece front welding groove ruler degree side view;
Fig. 2 (A) is workpiece front welding sequence of side views;
Fig. 2 (B) is back of work bevel for welding and welding sequence side view.
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, form single V-arrangement bevel groove at the special 902 steel workpiece corner connection positions of thickness 30mm, stay root 10mm, bevel groove is 55 ° relative to basic part surface angle; 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) preheating step: by workpiece to be welded and the thick 980 steel basic part corner connections of 30mm, form single V-arrangement corner connection groove, corner connection bevel angle is 55 °, corner connection groove gap 0mm ~ 1mm; Then carry out preheating within the scope of diametrical connection groove and both sides 150mm thereof, preheat temperature reaches 130 DEG C and starts welding;
(3) front welding step: as shown in Fig. 2 (A), adopts 5 layer of 8 road manual electric arc welding, to fill up the bevel groove at corner connection position, welding material adopt with basic part yield strength match φ 4.0mmCHE58-1HR welding rod; Welding current 165A ~ 175A, arc voltage 23V ~ 25V, speed of welding 10cm/min ~ 18cm/min, during welding, between road, temperature controls at 130 DEG C; The vertical toe of weld height of weld seam is 28mm ~ 31mm, and the horizontal toe of weld height of weld seam is 8mm ~ 10mm;
(4) face bonding post-processing step: judge whether that environment temperature is 5 DEG C ~ 30 DEG C and relative humidity is less than 70%, go to step (5), otherwise heat within the scope of weld seam and weld seam both sides 150mm, heating-up temperature reaches 200 DEG C, be incubated 2.5 hours, then adopt sheet asbestos to cover weldment to make it to slowly cool to room temperature, then carry out step (5);
(5) back gouging step: as shown in Fig. 2 (B), first adopts φ 10mm carbon-point butt welded seam back side gouge back chipping, forms circular arc groove; Then carry out preheating within the scope of circular arc groove and both sides 150mm thereof, preheat temperature reaches 130 DEG C, carries out step (6);
(6) back side welding step: as shown in Fig. 2 (B), adopts 5 layer of 8 road manual electric arc welding, to fill up the circular arc groove at corner connection position, welding material adopt with basic part yield strength match φ 4.0mmCHE58-1HR welding rod; Welding current 165A ~ 175A, arc voltage 23V ~ 25V, speed of welding 10cm/min ~ 18cm/min, during welding, between road, temperature controls at 130 DEG C; The vertical toe of weld height of weld seam is 28mm ~ 31mm, and the horizontal toe of weld height of weld seam is 8mm ~ 10mm;
(7) back side after welding treatment step: judging whether that environment temperature is 5 DEG C ~ 30 DEG C and relative humidity is less than 70%, is terminate; Otherwise heat within the scope of weld seam and weld seam both sides 150mm, heating-up temperature reaches 200 DEG C, be incubated 2.5 hours, then adopt sheet asbestos to cover weldment and make it to slowly cool to room temperature, terminate.
Embodiment 2, identical with the step of embodiment 1, difference is only the technological parameter in each step:
Formed in groove step, stay root 12mm, bevel groove angle is 50 °;
In preheating step, corner connection bevel angle is 50 °, corner connection groove gap 0mm ~ 1mm, and preheat temperature reaches 100 DEG C and starts welding;
In the welding step of front, during welding, between road, temperature controls at 100 DEG C.
In face bonding post-processing step, heating-up temperature reaches 250 DEG C, is incubated 2 hours;
In back gouging step, preheat temperature reaches 100 DEG C;
In the welding step of the back side, during welding, between road, temperature controls at 100 DEG C;
In back side after welding treatment step, heating-up temperature reaches 250 DEG C, is incubated 2 hours.
In the front welding step of the various embodiments described above and back side 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 (3)
1. the steel for ship structure straight angle connects a welding method, it is characterized in that, comprises the steps:
(1) groove step is formed: form single V-arrangement bevel groove at workpiece corner connection position to be welded, stay root δ/3 ± 2mm, wherein workpiece thickness of slab δ >=30mm, bevel groove is 50 ° ~ 55 ° relative to basic part surface angle;
(2) preheating step: by workpiece to be welded and basic part corner connection, forms single V-arrangement corner connection groove, and corner connection bevel angle is 50 ° ~ 55 °, corner connection groove gap 0mm ~ 1mm; Then carry out preheating within the scope of diametrical connection groove and both sides 150mm thereof, preheat temperature reaches 100 DEG C ~ 130 DEG C and starts welding;
(3) front welding step: adopt the manual electric arc welding of multilayer multiple tracks, to fill up the bevel groove at corner connection position, welding material adopts the welding rod matched with basic part yield strength; During welding, between road, temperature controls at 100 DEG C ~ 130 DEG C;
(4) face bonding post-processing step: judge whether that environment temperature is 5 DEG C ~ 30 DEG C and relative humidity is less than 70%, go to step (5), otherwise heat within the scope of weld seam and weld seam both sides 150mm, heating-up temperature reaches 200 DEG C ~ 250 DEG C, be incubated 2 hours or more, then adopt sheet asbestos to cover weldment to make it to slowly cool to room temperature, then carry out step (5);
(5) back gouging step: first adopt φ 10mm carbon-point butt welded seam back side gouge back chipping, forms circular arc groove; Then carry out preheating within the scope of circular arc groove and both sides 150mm thereof, preheat temperature reaches 100 DEG C ~ 130 DEG C, carries out step (6);
(6) back side welding step: adopt the manual electric arc welding of multilayer multiple tracks, to fill up the circular arc groove at corner connection position, welding material adopts the welding rod matched with basic part yield strength; During welding, between road, temperature controls at 100 DEG C ~ 130 DEG C;
(7) back side after welding treatment step: judging whether that environment temperature is 5 DEG C ~ 30 DEG C and relative humidity is less than 70%, is terminate; Otherwise heat within the scope of weld seam and weld seam both sides 150mm, heating-up temperature reaches 200 DEG C ~ 250 DEG C, be incubated 2 hours or more, then adopt sheet asbestos to cover weldment and make it to slowly cool to room temperature, terminate.
2. the steel for ship structure straight angle as claimed in claim 1 connects welding method, it is characterized in that:
Described front is welded and in the welding step of the back side, is adopted φ 4.0mm welding rod, welding current 165A ~ 175A, arc voltage 23V ~ 25V, speed of welding 10cm/min ~ 18cm/min.
3. the steel for ship structure straight angle as claimed in claim 1 or 2 connects welding method, it is characterized in that:
Described front is welded and in the welding step of the back side, 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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| CN201510708325.XA CN105195858B (en) | 2015-10-27 | 2015-10-27 | A kind of steel for ship structure straight angle connects welding method |
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| CN201510708325.XA CN105195858B (en) | 2015-10-27 | 2015-10-27 | A kind of steel for ship structure straight angle connects welding method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105665896A (en) * | 2016-03-15 | 2016-06-15 | 广船国际有限公司 | Welding method of transverse position angle joint |
| CN106363281A (en) * | 2016-08-30 | 2017-02-01 | 鞍钢建设集团有限公司 | Welding method for steel Q390GJC for building structure |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105195873B (en) * | 2015-10-27 | 2018-07-03 | 武昌船舶重工集团有限公司 | A kind of steel for ship structure founds corner connection welding method |
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| JP2005014001A (en) * | 2003-06-23 | 2005-01-20 | Shin Kurushima Dockyard Co Ltd | Welding method for corrugated partition corner part |
| CN102009257A (en) * | 2010-12-01 | 2011-04-13 | 武昌船舶重工有限责任公司 | Process for welding high-strength hull structural steel by fillet welding in vertical position |
| CN102009255A (en) * | 2010-12-01 | 2011-04-13 | 武昌船舶重工有限责任公司 | Downward and butt welding process for high strength steel for ship structure |
| 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 |
| CN104014914A (en) * | 2014-06-04 | 2014-09-03 | 浙江省海洋开发研究院 | Welding method for high-strength steel in hull structure |
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2015
- 2015-10-27 CN CN201510708325.XA patent/CN105195858B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005014001A (en) * | 2003-06-23 | 2005-01-20 | Shin Kurushima Dockyard Co Ltd | Welding method for corrugated partition corner part |
| 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 |
| CN102009257A (en) * | 2010-12-01 | 2011-04-13 | 武昌船舶重工有限责任公司 | Process for welding high-strength hull structural steel by fillet welding in vertical position |
| CN102009255A (en) * | 2010-12-01 | 2011-04-13 | 武昌船舶重工有限责任公司 | Downward and butt welding process for high strength steel for ship structure |
| CN104014914A (en) * | 2014-06-04 | 2014-09-03 | 浙江省海洋开发研究院 | Welding method for high-strength steel in hull structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105665896A (en) * | 2016-03-15 | 2016-06-15 | 广船国际有限公司 | Welding method of transverse position angle joint |
| CN106363281A (en) * | 2016-08-30 | 2017-02-01 | 鞍钢建设集团有限公司 | Welding method for steel Q390GJC for building structure |
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