CN104999167A - Thick steel plate vertical welding method - Google Patents
Thick steel plate vertical welding method Download PDFInfo
- Publication number
- CN104999167A CN104999167A CN201510384486.8A CN201510384486A CN104999167A CN 104999167 A CN104999167 A CN 104999167A CN 201510384486 A CN201510384486 A CN 201510384486A CN 104999167 A CN104999167 A CN 104999167A
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- Prior art keywords
- welding
- steel plate
- plate vertical
- groove
- heat treatment
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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
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
-
- 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
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/003—Cooling means
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/18—Sheet panels
- B23K2101/185—Tailored blanks
-
- 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 discloses a thick steel plate vertical welding method which comprises the following steps of welding preparation, welding, and postweld heat treatment, wherein in the step of postweld heat treatment, a workpiece enters a furnace wholly and subjected to postwelding stress relieving annealing treatment, and a method of the postweld heat treatment comprises the steps that the workpiece is arranged in the furnace with the furnace temperature not great than 300 DEG, heated to 625 DEG plus-minus 20 DEG at a rate of 65 DEG/h and kept for 6h, then cooled to below 300 DEG at a rate of 65 DEG/h, discharged out of the furnace and cooled in still air. Macrocosmically, no arc breaking occurs in a welding process; the surface of a welding seam is shaped smoothly and attractively; except lack of fusion at an arc end, no defect is found in fusion and transition between welding deposits of subsequent welding seams and wood. A cutting sampling analysis on the welding seams of a test piece for welding indicates that the mechanical properties of the welding seams are higher than those of parent metal; the rigidity of the parent metal in a heat-affected zone is lower than the rigidity of the welding seams, and is lightly higher than the rigidity of the parent metal outside the heat-affected zone; and the forming widths of the welding seams at the front and back are consistent.
Description
Technical field
The invention belongs to welding technology field, particularly relate to a kind of steel plate vertical welding method.
Background technology
Along with the fast development of China's economic construction, thick steel plate steel structure welding appears at the industries such as metallurgy, shipbuilding, petrochemical industry, water conservancy in a large number.For the steel plate vertical welding of thickness at 60-100 mm (even thicker), also there is no a kind of high-quality and efficient welding method and relevant device, SMAW is difficult to solve this difficult problem, though electroslag welding can solve this difficult problem, such as application number is 201010180014.8, what denomination of invention was that the patent of the welding method of slab banjo fixing butt jointing says is exactly adopt the method for electroslag welding with tube electrode to be that the workpiece of 240-286mm is welded as a whole by two pieces thickness, the method step comprised: the first step, welds prepares: add multiple alloy elements and obtain powder in pipe formulation for coating material, add adhesive after powder mixes, make pipe coating, pipe coating is coated on the outer wall of pipe pole, four pipes are extremely fixedly assemblied on clamping device, regulate the fit-up gap of two workpiece, second step, welding: carry out electroslag welding, sends in the molten bath that four pipe poles are formed by welding wire, energising welding, welding direction is for be welded to upper groove from lower groove, 3rd step, post weld heat treatment.
And application number is 201420545534.8, denomination of invention is a kind of patent of electroslag welder, technical scheme disclosed in it comprises electroslag welding power supply, the power-supply controller of electric be connected with described electroslag welding power supply, wire feeder, welding gun, mechanical driver unit, cooling device, the power interface be connected with described electroslag welding power supply, wire feeder comprises welding wire funnel, wire feed pipeline, wire-feed motor, school silk device, described welding wire funnel is connected with welding gun by wire feed pipeline, described wire-feed motor is connected on wire feed pipeline, described cooling device comprises water tank, water pipeline, described water tank is connected with welding gun by water pipeline, described mechanical driver unit comprises the pendulous device and lifting device that are connected with welding gun, described pendulous device is connected with oscillating motor, the other end is connected with welding gun by drive link, described pendulous device bottom is provided with bearing, described lifting device is connected with lifting motor.
But because the heat affected area of electroslag welding is large, weld seam cools naturally, causes weld seam and perienchyma's coarse grains thereof, causes weld properties lower than the mechanical property of mother metal, and this fatal shortcoming makes electroslag welding face the state be eliminated, and now seldom applies.
Summary of the invention
The object of the invention is to provide a kind of steel plate vertical welding method for thick steel plate steel structure vertical welding, the process employs tandem electrogas welding machine and weld, solve prior art medium plate and found the problem of stitching high-quality and efficient automatic welding difficulty.
The technical solution used in the present invention is:
The method of steel plate vertical welding, comprises the following steps:
Step one, welds prepares:
A, offer X-type groove, the gap of lower groove is 6mm, and the gap of upper groove is 18mm;
B, at distance groove 500mm place be parallel to groove length direction, welding tractor to be adsorbed on steel plate;
C, arc end flame is heated to 200 degrees Celsius;
D, setting torch swinging parameter, welding current, weldingvoltage;
E, unlatching carbon dioxide steam supply valve, circulating water cooling system;
Step 2, welding: the welding parameter in welding process is: wire feed rate is 15m/min; Arc voltage is 38-40V; Speed of welding is 4cm/min; Welding current is 480-550A; The welding extraction stage lowers weldingvoltage and wire feed rate gradually;
Step 3, post weld heat treatment: postwelding entirety enters the process of stove Stress relieving annealing; The method of described post weld heat treatment is: workpiece is placed in furnace temperature not higher than the stove of 300 DEG C, keep 6 hours to temperature 625 ± 20 DEG C with the heating rate of the rate of heat addition 65 DEG C/h, be then cooled to less than 300 DEG C to come out of the stove with the speed of 65 DEG C/h and cool in still air.
In described step one, carbon dioxide gas supply flow is all 25L/min when welding front and back.
Setting circulating water flow in described step one, is all 130L/min when welding front and back.
Welding the welding wire trade mark selected in described step 2 is 43G, φ 1.6mm.
Also comprise in described step one: triangle water-cooled copper gear row is loaded in underside groove.
After the present invention adopts technique scheme, there is following technique effect:
From macroscopically, do not occur current interruption in welding process, appearance of weld is smoothly attractive in appearance, and except except arc end lack of fusion, the weldering meat of subsequent weld and timber fuse the equal zero defect of transition.
The cutting sampling analysis of test piece for welding weld seam is shown: weld properties is than the height of mother metal, and the hardness ratio weld seam of heat affected area mother metal is low, slightly higher than the mother metal hardness beyond heat affected area; Positive and negative appearance of weld width is consistent.
Detailed description of the invention
For making the object of the application and technical scheme clearly, be clearly and completely described below in conjunction with the technical scheme of the embodiment of the present application to the application.Obviously, described embodiment is a part of embodiment of the application, instead of whole embodiments.Based on the embodiment of described the application, the every other embodiment that those of ordinary skill in the art obtain under without the need to the prerequisite of creative work, all belongs to the scope of the application's protection.
Described tandem electrogas welding machine comprises two sources of welding current, two wire-feed motor, mariages water cooled welding torch, welding tractor, a set of water-cooling system, a set of carbon dioxide air supply system and the welding operation box be all electrically connected with above-mentioned parts, a source of welding current connects a wire-feed motor, wire-feed motor, water-cooling system and carbon dioxide air supply system are connected to mariages water cooled welding torch, and mariages water cooled welding torch is arranged on welding tractor; Described welding tractor comprises car body, track, magnet, welding gun adjusting mechanism and welding gun oscillation mechanism, track two ends are arranged for track being adsorbed in the magnet on welded steel plate, walking gear on car body engages with the tooth bar on track and realizes car body walking in orbit, welding gun adjusting mechanism is arranged on car body, the output of welding gun adjusting mechanism installs welding gun oscillation mechanism, welding gun oscillation mechanism is installed mariages water cooled welding torch, welding gun adjusting mechanism is used for carrying out adjustment to the position of mariages water cooled welding torch and angle and locates; For controlling and regulating the welding operation box of welding process parameters to be fixed in the track be positioned at above car body; A set of electric-control system for operating whole welding process has been installed in welding operation box.
Tandem electrogas welding machine is adopted to carry out the processing step welded:
Step one, welds prepares
(1) offer X-type groove, the gap of lower groove is 6mm, and the gap of upper groove is 18mm; At distance groove 500 mm place be parallel to groove length direction, be adsorbed on steel plate by the track of welding tractor, welding tractor is installed in orbit.
(2) electric wire is accessed, make the source of welding current, welding tractor, water cooling system, carbon dioxide air supply system and electric-control system online and to electricity, then start the source of welding current, make tandem electrogas welding machine be in quasi-operating status.
(3) arc end flame is heated to 200 degrees centigrade.
(4) triangle water-cooled copper gear row is loaded in underside groove.
(5) welding tractor is walked to striking position, water-cooled slide block installs in place, places and is used for the broken welding wires of striking, adjust welding gun adjusting mechanism toward groove striking point, welding gun is goed deep in groove and is in close welding position.
(6) set torch swinging parameter, the principle swinging the idle hours of two end points is: short inside groove, outer face length (because of narrow outer face width inside groove).Do swing test, make welding gun be in correct position and swing state.
(7) welding current, weldingvoltage parameter is set;
(8) carbon dioxide steam supply valve, circulating water cooling system is opened;
Preferably, carbon dioxide gas supply flow is all 25L/min when welding front and back.Circulating water flow is all 130L/min when welding front and back.
Further, welding the welding wire trade mark selected is 43G, φ 1.6mm.
Step 2, welding: the welding parameter in welding process is: wire feed rate is 15m/min; Arc voltage is 38-40V; Speed of welding is 4cm/min; Welding current is 480-550A; The welding extraction stage lowers weldingvoltage and wire feed rate gradually;
Step 3, post weld heat treatment: postwelding entirety enters the process of stove Stress relieving annealing; The method of described post weld heat treatment is: workpiece is placed in furnace temperature not higher than the stove of 300 DEG C, keep 6 hours to temperature 625 ± 20 DEG C with the heating rate of the rate of heat addition 65 DEG C/h, be then cooled to less than 300 DEG C to come out of the stove with the speed of 65 DEG C/h and cool in still air.
After weld seam is soldered, press " stopping " button on welding operation box, and water-cooling system also to continue work a period of time, cool further with the device (as water-cooling copper bar, water-cooled slide block, water cooled welding torch etc.) that is heated to make weld seam.
Postwelding is analyzed:
Butt welded seam carries out macroscopic observation, obtains: do not occur current interruption in welding process, and appearance of weld is smoothly attractive in appearance, and except except arc end lack of fusion, the weldering meat of subsequent weld and timber fuse the equal zero defect of transition.
Hardness test is carried out in butt welded seam sampling, obtains data:
| Title | Impression diameter/mm | Hardness (HB) |
| Weld seam | 4.30 | 192 |
| Nearly spot welds | 4.58 | 155 |
| Spot welds far away | 4.85 | 145 |
Data show, weld properties is higher than mother metal, and the hardness ratio weld seam of heat affected area mother metal is low, slightly higher than the mother metal hardness beyond heat affected area.
Butt welded seam positive and negative is measured, and the result obtained is that positive and negative appearance of weld width is consistent.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, and all terms used herein (comprising technical term and scientific terminology) have the meaning identical with the general understanding of the those of ordinary skill in field belonging to the application.Should also be understood that those terms defined in such as general dictionary should be understood to have the meaning consistent with the meaning in the context of prior art, unless and define as here, can not explain by idealized or too formal implication.
The implication of the "and/or" described in the application refers to respective individualism or both simultaneous situations include interior.
With the above-mentioned desirable embodiment according to the application for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this application technological thought, can carry out various change and amendment completely.The technical scope of this application is not limited to the content on description, must determine its technical scope according to right.
Claims (5)
1. the method for steel plate vertical welding, is characterized in that, comprises the following steps:
Step one, welds prepares:
A, offer X-type groove, the gap of lower groove is 6mm, and the gap of upper groove is 18mm;
B, at distance groove 500mm place be parallel to groove length direction, welding tractor to be adsorbed on steel plate;
C, arc end flame is heated to 200 degrees Celsius;
D, setting torch swinging parameter, welding current, weldingvoltage;
E, unlatching carbon dioxide steam supply valve, circulating water cooling system;
Step 2, welding: the welding parameter in welding process is: wire feed rate is 15m/min; Arc voltage is 38-40V; Speed of welding is 4cm/min; Welding current is 480-550A; The welding extraction stage lowers weldingvoltage and wire feed rate gradually;
Step 3, post weld heat treatment: postwelding entirety enters the process of stove Stress relieving annealing; The method of described post weld heat treatment is: workpiece is placed in furnace temperature not higher than the stove of 300 DEG C, keep 6 hours to temperature 625 ± 20 DEG C with the heating rate of the rate of heat addition 65 DEG C/h, be then cooled to less than 300 DEG C to come out of the stove with the speed of 65 DEG C/h and cool in still air.
2. steel plate vertical welding method according to claim 1, is characterized in that, in described step one, carbon dioxide gas supply flow is all 25L/min when welding front and back.
3. steel plate vertical welding method according to claim 1, is characterized in that, set circulating water flow in described step one, is all 130L/min when welding front and back.
4. steel plate vertical welding method according to claim 1, is characterized in that, welding the welding wire trade mark selected in described step 2 is 43G, φ 1.6mm.
5. a steel plate vertical welding method as claimed in claim 1, is characterized in that, also comprise in described step one: triangle water-cooled copper gear row loaded in underside groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510384486.8A CN104999167A (en) | 2015-06-30 | 2015-06-30 | Thick steel plate vertical welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510384486.8A CN104999167A (en) | 2015-06-30 | 2015-06-30 | Thick steel plate vertical welding method |
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| CN104999167A true CN104999167A (en) | 2015-10-28 |
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| CN201510384486.8A Withdrawn CN104999167A (en) | 2015-06-30 | 2015-06-30 | Thick steel plate vertical welding method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107267700A (en) * | 2017-07-14 | 2017-10-20 | 中国十九冶集团有限公司 | Device and method is answered in disappearing for blast furnace shell weld seam |
| CN107953043A (en) * | 2017-12-28 | 2018-04-24 | 安徽马钢设备检修有限公司 | A kind of welding procedure of last furnace shell longitudinal seam |
| CN108213661A (en) * | 2017-12-29 | 2018-06-29 | 南京理工大学 | A kind of welding method of the vertical high-strength steel member of vertical position welding of robot double wire |
| CN108856970A (en) * | 2018-08-24 | 2018-11-23 | 南京钢铁股份有限公司 | The welding method of tandem electrogas welding suitable for high strength ultra-thick steel plates |
| CN109047997A (en) * | 2018-08-10 | 2018-12-21 | 武汉科技大学 | The welding method of tandem electrogas welding suitable for super large weld heat input |
| CN112589233A (en) * | 2020-12-02 | 2021-04-02 | 上海江南长兴造船有限责任公司 | One-step forming welding method for hull structure panel |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107267700A (en) * | 2017-07-14 | 2017-10-20 | 中国十九冶集团有限公司 | Device and method is answered in disappearing for blast furnace shell weld seam |
| CN107953043A (en) * | 2017-12-28 | 2018-04-24 | 安徽马钢设备检修有限公司 | A kind of welding procedure of last furnace shell longitudinal seam |
| CN108213661A (en) * | 2017-12-29 | 2018-06-29 | 南京理工大学 | A kind of welding method of the vertical high-strength steel member of vertical position welding of robot double wire |
| CN109047997A (en) * | 2018-08-10 | 2018-12-21 | 武汉科技大学 | The welding method of tandem electrogas welding suitable for super large weld heat input |
| CN108856970A (en) * | 2018-08-24 | 2018-11-23 | 南京钢铁股份有限公司 | The welding method of tandem electrogas welding suitable for high strength ultra-thick steel plates |
| CN112589233A (en) * | 2020-12-02 | 2021-04-02 | 上海江南长兴造船有限责任公司 | One-step forming welding method for hull structure panel |
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Application publication date: 20151028 |