CN109352137A - Angle steel welding method - Google Patents
Angle steel welding method Download PDFInfo
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- CN109352137A CN109352137A CN201811510125.3A CN201811510125A CN109352137A CN 109352137 A CN109352137 A CN 109352137A CN 201811510125 A CN201811510125 A CN 201811510125A CN 109352137 A CN109352137 A CN 109352137A
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- 238000003466 welding Methods 0.000 title claims abstract description 150
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 106
- 239000010959 steel Substances 0.000 title claims abstract description 106
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000007789 gas Substances 0.000 claims description 35
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 10
- 230000004907 flux Effects 0.000 claims description 8
- 229910000679 solder Inorganic materials 0.000 claims description 8
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 5
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 2
- 208000037656 Respiratory Sounds Diseases 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000035515 penetration Effects 0.000 description 5
- 230000004927 fusion Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
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
-
- 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
- B23K9/18—Submerged-arc 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
- B23K9/235—Preliminary treatment
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
This application discloses angle steel welding methods, include the following steps: to open up side slope mouth on the first steel plate and the second steel plate, it has opened up the first steel plate and the second steel plate vertical alignment after side slope mouth, first steel plate and the second steel plate are distributed in L font, and the side slope mouth on the side slope mouth and the second steel plate on the first steel plate forms the first groove and the second groove, and first groove and the second groove be located inside and outside the right angle end of L-shaped, the first groove and the second groove are V-shaped.The angle steel weldquality obtained the invention has the following beneficial effects: welding is stablized, and is not in crackle and lamellar tearing, and can significantly reduce welding deformation amount.
Description
Technical field
The present invention relates to steel tower field more particularly to a kind of angle steel welding methods.
Background technique
It builds and continues to develop with national grid, original electric power pylon component has been unable to meet UHV transmission or same tower
It is feed back power technology requirement more, become the new trend of steel tower design using large-size high-strength angle steel.Big specification is used in angle steel tower
Angle steel substitutes common Two bors d's oeuveres or four spelling angle steel, can reduce Tower processing amount with amplitude, reduce connection bolt and fill plate, improve steel tower
The advantages such as construction efficiency.Large-size high-strength angle steel refers to that limb is wide not less than 220mm, and limb thickness is in 20mm or more, strength grade
For Q420 and its more than.
The method for producing big specification angle steel at present is the hot rolling production in steel mill, but due to large-size hot-rolled angle steel application
Range is relatively narrow, and market demand is small, so steel mill is strict control to the yield of big specification angle steel, steel mill usually can only connect
To order reach a certain amount of and just start to produce, can't arrange production immediately for scattered order steel mill, thus can shadow
The construction of angle steel tower is rung, transmission line construction engineering is delayed.
Q420 low-alloy high-strength steel plate (hereafter referred to collectively as " steel plate ") is cheap, intensity is high since material source is wide
The advantages that be very suitable to for the big specification angle steel of welding production, but form member due to containing the carbide such as V, Ti, Nb in steel plate
Element, so current welding technique is easy to appear during welding steel prepares angle steel and splits with method (flat plate splicing welding method)
The technical problem of line and lamellar tearing.
Summary of the invention
The present invention is in view of the above-mentioned problems, propose a kind of angle steel welding method.
The technical solution adopted by the present invention is as follows:
1. a kind of angle steel welding method, includes the following steps:
S1: opening up side slope mouth on the first steel plate and the second steel plate, has opened up the first steel plate and the second steel after side slope mouth
Plate vertical alignment, the first steel plate and the second steel plate are distributed in L font, and on the side slope mouth and the second steel plate on the first steel plate
Side slope mouth forms the first groove and the second groove, and the first groove and the second groove are located inside and outside the right angle end of L-shaped
Two sides, the first groove and the second groove are V-shaped；
S2: gas shield welding bottoming is carried out to the first groove, then submerged-arc welding is carried out to the side slope mouth on the basis of gas shield welding；
S3: submerged-arc welding is carried out after having carried out submerged-arc welding to the first groove, then to the second groove.
It should be noted that the first steel plate described in this case and the second steel plate are Q420 low-alloy high-strength steel plates, and
The width of steel plate is not less than 220mm, and thickness is not less than 20mm, and length is 6000mm~12000mm.
Above-mentioned design is taken to the first steel plate and the second steel plate according to " welding for steel structure specification " (GB50661-2011), is made
It obtains and forms the first groove and the second groove between the first steel plate and the second steel plate.The structure of specific first groove and the second groove
Design is the figure b in conjunction with Fig. 5 .5.1-1 in " welding for steel structure specification " page 31 and schemes the way of recommendation in d and design.
First groove and the second groove employed in this case can guarantee the penetration of weld seam, and weld strength is high；While by
Suitable with the second groove loading and structure in the first groove, the stress that can effectively reduce connector is concentrated, and can effectively prevent layer
Shape tearing and reduction welding deformation, increase the cracking resistance of weld seam；Simultaneously weld it is easy to operate, external V-type side slope mouth into
It is equivalent to when row welding and carries out plate docking.
To the advanced row gas shield welding bottoming of the first groove, then carrying out submerged-arc welding on the basis of gas shield welding is because gas shield welding is beaten
What bottom was played the role of is back cover root gap, guarantees have enough thickness to be unlikely to penetrate when carrying out submerged-arc welding.
The angle steel weld seam welded using this law is not in crackle, is not in lamellar tearing, and welding quality is steady
It is fixed.
Optionally, the first steel plate and the second steel plate are first weldingly fixed on one before carrying out gas shield welding to the first groove
It rises.
The method being welded and fixed is first to carry out tack welding, and tack welding is carried out after the completion of tack welding.
Optionally, first to carrying out tack welding between the first steel plate and the second steel plate, after the completion of tack welding again the first steel plate with
Tack welding is carried out between second steel plate.
The effect of tack welding is that a tentatively fixed effect is played to the first steel plate and the second steel plate, and tack welding is in point
It is welded again on the basis of shape weld seam, expands fusion length, fix weldment.Specifically when carrying out tack welding, electric current is greater than
It is to increase its fusion penetration when normal weld.
Optionally, to area to be welded before welding to the first groove, its temperature is made to reach 150 DEG C~180 DEG C.
Weld preheating is to choose (150 DEG C~180 DEG C) of this temperature range requirements to reduce welding deformation and weld crack
It is to consider that weldment is larger, relatively good pre-heat effect can be reached in the heating of at least 100mm range.It can be completed simultaneously in welding
Butt-welding fitting carries out isothermal holding afterwards, can be further reduced weld crack in this way.
Optionally, it completes to carry out gouge back chipping to the second groove to after the submerged-arc welding of the first groove, after completing gouge back chipping
Grinding process is carried out to the second groove again.
Back chipping is to guarantee root penetration, and first of the second groove welding is particularly critical, when unclear root bead connects, if submerged arc
It is big to weld first of electrical parameter, energy penetration, but it is easy to appear crackle.If submerged arc electric current is slightly less than normal, easily there are non-fusion defects.
This technique still uses conventional carbon arc air gouging back chipping technique, cooperates suitable electric current, and root run welding quality is preferable, and steady
It is fixed.
Optionally, the protective gas of the gas shield welding is argon gas and carbon dioxide gas mixture, gas flow 18L/
Min~25L/min.
Optionally, the ratio of the argon gas and carbon dioxide gas is 17:3.
The mixed gas of said ratio can be reduced splashing in gas shield welding, and weld appearance is beautiful, can reduce postwelding and beat
Grind workload.
Optionally, the welding wire of gas shield welding selects Φ 1.2mm, trade mark ER55-D2, and welding arc voltage is 25V~30V,
Welding current is 220A~280A, and speed of welding is 250mm/min~350mm/min.
ER55-D2 gas shield welding wire backing welding is selected, the intensity of welding wire is suitable with strength of parent.Gas shield welding heat input is low, weldering
It stitches metal final strength and is slightly larger than base material.
Optionally, the welding wire of the submerged-arc welding selects the H10Mn2 of Φ 4.0mm, solder flux SJ101, and welding arc voltage is
28V~35V, welding current are 500A~650A, and speed of welding is 350mm/min~400mm/min.
Submerged-arc welding is the welding method of high heat-input, and the degree of emphasizing of weld heat-affected zone is often below base material, and weld seam gold
The toughness of category is poor.Welding wire solder flux Combination Welding strength range used in the present invention is slightly less than Q420 base material, is to belong to low strong matching,
But this does not imply that strength of joint is lower than base material, it ensure that the toughness of weld metal and cracking resistance increase instead.
Optionally, the angle value of first groove is 40 °~50 °, and the angle value of second groove is 50 °~60 °.
Above-mentioned design can guarantee that welding being capable of penetration.Entire welding is completed further to rectify entire welded unit
Just.
The beneficial effects of the present invention are: the angle steel commissure that welding obtains is not in crackle, it is not in lamellar tearing；
And significantly reduce welding deformation amount.
Detailed description of the invention:
Fig. 1 is the structure schematic diagram for welding angle steel.
Each appended drawing reference in figure are as follows: the 1, first layer, the 2, second layer, 3, third layer, the 4, the 4th layer, the 5, the 5th weldering
Layer, the 6, the 6th layer, the 7, the 7th layer, the 8, the 8th layer, the 9, the 9th layer, the 10, first steel plate, the 11, second steel plate, 12, the
One groove, the 13, second groove,
Specific embodiment:
With reference to the accompanying drawing 1, the present invention will be described in detail.
The present invention provides a kind of angle steel welding method, and production length is the angle steel of 8000mm model L300 × 28.It chooses
Q420B steel, ER55-D2 and H10Mn2 welding wire and the SJ101 solder flux of 28mm is raw material, and attached drawing groove type is taken to open up slope
Mouthful, sequence is as follows
S1: using multiple gun flame cutting equipment to steel plate cutting, to the first steel plate 10 (long 8150mm, wide 300mm, thickness
It 28mm) is processed with the second steel plate 11 (long 8150mm, wide 270mm, thick 28mm) using groove edge milling machines, and uses sanding machine pair
Side slope mouth is polished inside and outside nearby, makes to expose metallic luster within the scope of its neighbouring 30mm, and confirm side bevelled edge
Zero defect within the scope of 30mm；
S2: the first steel plate 10 and the second steel plate 11 are aligned to a L font, form folder on the inside of the right angle end of L-shaped
Angle is 40 °~50 ° the first grooves of V-arrangement 12, and it is 50 °~60 ° the second grooves of V-arrangement that angle is formd on the outside of the right angle end of L-shaped
13,13 equal, the 0~1mm of root face of height of the first groove 12 and the second groove；
S3: carrying out tack welding and tack welding to the first steel plate 10 and the second steel plate 11, and root gap is controlled in 2~4mm,
Tack welding fusion length is 30~40mm, every section of 350~500mm of weld spacing, and weld seam two sides should be smooth, and welding wire selects Φ
The 1.2mm trade mark are as follows: ER55-D2, welding arc voltage are 25V~30V, and welding current is 220A~280A, and speed of welding is
250mm/min~350mm/min, the source of welding current select Panasonic MBC-500；
S4: setting a postwelding through point, then opposite side groove is preheated, and sets preheating temperature as 150 DEG C~180 DEG C, preheats
Heating region should should be 1.5 times of plate thickness or more, and no less than 100mm range in joint edge groove two sides, width；
S5: gas shield welding (the first layer 1 of weldering) is carried out to the first groove 12, gas shield welding is carried out after the completion of preheating, welding wire is selected
The Φ 1.2mm trade mark are as follows: ER55-D2, ratio of gas mixture Ar:CO2=17:3, gas flow are 18L/min~25L/min,
Purity of argon is 99.95% or more；Welding arc voltage is 25~30V, and welding current is 220~280A, and speed of welding is
250mm/min~350mm/min, the source of welding current select Panasonic MBC-500.The layer thickness control of gas shield welding 3.0mm~
Within the scope of 3.8mm, the first layer 1 is completed in gas shield welding welding；
S6: carrying out submerged-arc welding (the second layer 2 of weldering) to the first groove 12, and submerged-arc welding wire selects the H10Mn2 of Φ 4.0mm,
Solder flux is SJ101, and welding arc voltage is 28V~32V, and welding current is 500A~600A, speed of welding be 350mm/min~
400mm/min, the source of welding current select Katyuan ZD5-1250B；
S7: carrying out back chipping to the second groove 13, Φ 8mm carbon-point selected to carry out gouge back chipping, is up to defect is fully erased
Only, it polishes after the completion of back chipping；
S8: carrying out submerged-arc welding (weldering third layer 3) to the second groove 13, and submerged-arc welding wire selects the H10Mn2 of Φ 4.0mm,
Solder flux is SJ101, and welding arc voltage is 28V~32V, and welding current is 500A~600A, speed of welding be 350mm/min~
400mm/min, the source of welding current select Katyuan ZD5-1250B；
S9: submerged-arc welding is carried out to the second groove 13, is successively soldered the 4th layer 4, the 5th layer 5, the 6th layer 6 and the 7th
Layer 7, submerged-arc welding wire select the H10Mn2 of Φ 4.0mm, solder flux SJ101, and welding arc voltage is 30V~35V, welding electricity
Stream is 550A~650A, and speed of welding is 350mm/min~400mm/min, and the source of welding current selects Katyuan ZD5-1250B；6th
Layer 6 and 7 cap weld reinforcement C of the 7th layer control control after 0~2mm, postwelding mechanical grinding in 0~1mm；
S10: carrying out submerged-arc welding to the first groove 12, is sequentially completed the 8th layer 8 and the 9th layer 9, submerged-arc welding wire choosing
With the H10Mn2 of Φ 4.0mm, solder flux SJ101, welding arc voltage is 30V~35V, and welding current is 550A~650A, weldering
Connecing speed is 350mm/min~400mm/min, and the source of welding current selects Katyuan ZD5-1250B；9th layer, 9 cap weld welding angle
Size hfControl carries out covering and heat insulating cotton isothermal holding after completing entire weld job process 0.5d ± 2mm (d is plate thickness),
Reduce the cooling rate of commissure.
It should be further noted that needing diagonal steel to be corrected after the completion of welding, the content of correction includes " straight line
The parameters such as degree ", " top right angle degree ", " torsion resistance ".Ultrasonic wave (phased array) carrying out flaw detection is carried out to weld seam after the completion of correction
Qualified (examination criteria GB/T 32563-2016, detection level B check and accept grade 2, acceptance criteria GB/T 29712-2013), adopts
Meet national standard Q/GDW 706-2012 " the big specification equal leg angle of electric power pylon hot rolling " requirement with the angle steel that this law is welded.
It should be noted that the specific layer number of plies is related with the thickness of steel plate, the thickness of every layer of layer also with the thickness of steel plate
It spends related.So can there are different layer number and different layer thickness in other equivalent embodiments, but the first weldering
Welding position, welding sequence and the welding procedure of layer, the second layer and third layer (specific process parameter can have adjustment)
It all must be same as the previously described embodiments.
The above description is only a preferred embodiment of the present invention, not thereby limits scope of patent protection of the invention, all
It is directly or indirectly to be used in other relevant technologies with equivalent structure transformation made by description of the invention and accompanying drawing content
Field similarly includes within the scope of the present invention.
Claims (10)
1. a kind of angle steel welding method, includes the following steps:
S1: carrying out side retaining wall on slope to the first steel plate and the second steel plate, has opened up the first steel plate and the second steel plate after side slope mouth
Vertical alignment, the first steel plate and the second steel plate are distributed in L font, and the cut place of the first steel plate and the second steel plate forms the
One groove and the second groove, and the first groove and the second groove are located inside and outside the right angle end of L-shaped, the first groove with
Second groove is V-shaped；
S2: gas shield welding bottoming is carried out to the first groove, then submerged-arc welding is carried out to the side slope mouth on the basis of gas shield welding；
S3: submerged-arc welding is carried out after having carried out submerged-arc welding to the first groove, then to the second groove.
2. angle steel welding method as described in claim 1, which is characterized in that first will before carrying out gas shield welding to the first groove
First steel plate is welded and fixed together with the second steel plate.
3. angle steel welding method as claimed in claim 2, which is characterized in that first carried out between the first steel plate and the second steel plate
Tack welding, tack welding carry out tack welding again after the completion between the first steel plate and the second steel plate.
4. angle steel welding method as described in claim 1, which is characterized in that treat welding zone before welding to the first groove
Domain is preheated, its temperature is made to reach 150 DEG C~180 DEG C.
5. angle steel welding method as described in claim 1, which is characterized in that complete to after the submerged-arc welding of the first groove to second
Groove carries out gouge back chipping, carries out grinding process to the second groove again after completing gouge back chipping.
6. angle steel welding method as described in claim 1, which is characterized in that the protective gas of the gas shield welding be argon gas with
Carbon dioxide gas mixture, gas flow are 18L/min~25L/min.
7. angle steel welding method as claimed in claim 6, which is characterized in that the ratio of the argon gas and carbon dioxide gas is
17:3.
8. angle steel welding method as described in claim 1, which is characterized in that the welding wire of gas shield welding selects Φ 1.2mm, and the trade mark is
ER55-D2, welding arc voltage be 25V~30V, welding current be 220A~280A, speed of welding be 250mm/min~
350mm/min。
9. angle steel welding method as described in claim 1, which is characterized in that the welding wire of the submerged-arc welding selects Φ 4.0mm's
H10Mn2, solder flux SJ101, welding arc voltage are 28V~35V, and welding current is 500A~650A, and speed of welding is
350mm/min~400mm/min.
10. angle steel welding method as described in claim 1, which is characterized in that the angle value of first groove be 40 °~
50 °, the angle value of second groove is 50 °~60 °.
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| CN201811510125.3A CN109352137A (en) | 2018-12-11 | 2018-12-11 | Angle steel welding method |
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|---|---|---|---|
| CN201811510125.3A CN109352137A (en) | 2018-12-11 | 2018-12-11 | Angle steel welding method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110560843A (en) * | 2019-09-05 | 2019-12-13 | 广州黄船海洋工程有限公司 | One-step forming welding process for Q420 high-strength steel thick plate by electro-gas welding |
| CN114682886A (en) * | 2022-04-28 | 2022-07-01 | 河南鼎力杆塔股份有限公司 | Welding method for angle iron tower steel cladding |
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| CN110560843A (en) * | 2019-09-05 | 2019-12-13 | 广州黄船海洋工程有限公司 | One-step forming welding process for Q420 high-strength steel thick plate by electro-gas welding |
| CN110560843B (en) * | 2019-09-05 | 2021-08-13 | 广州黄船海洋工程有限公司 | One-step forming welding process for Q420 high-strength steel thick plate by electro-gas welding |
| CN114682886A (en) * | 2022-04-28 | 2022-07-01 | 河南鼎力杆塔股份有限公司 | Welding method for angle iron tower steel cladding |
| CN114682886B (en) * | 2022-04-28 | 2024-03-19 | 河南鼎力杆塔股份有限公司 | Welding method for angle iron tower steel |
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