CN103894710A - High-strength Q500qE bridge steel thick plate submerged-arc welding method - Google Patents

High-strength Q500qE bridge steel thick plate submerged-arc welding method Download PDF

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Publication number
CN103894710A
CN103894710A CN201410137615.9A CN201410137615A CN103894710A CN 103894710 A CN103894710 A CN 103894710A CN 201410137615 A CN201410137615 A CN 201410137615A CN 103894710 A CN103894710 A CN 103894710A
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welding
submerged
arc welding
strength
bridge steel
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Inventor
缪凯
牟文广
陈浮
李立军
黄治军
胡因洪
许颖
胡家国
王靓
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Wuhan Iron and Steel Group Corp
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Wuhan Iron and Steel Group Corp
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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
    • B23K9/18—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
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
    • 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
    • B23K9/00—Arc welding or cutting
    • B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded
    • 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

Abstract

A high-strength Q500qE bridge steel thick plate submerged-arc welding method includes the steps: applicable mechanical properties of base plates include ReL not smaller than 500MPa, Rm not smaller than 650MPa, elongation A not smaller than 18%, and -40oCKV2 impact power not smaller than 120J; thick plates are combined by welding under equal thickness of 50mm and 60mm, preheating is not performed before welding, and heat treatment is not performed after welding; submerged-arc welding grooves are double-side U-shaped symmetric grooves at 60-degree angle, root face R of each grove is 7mm; tensile strength of submerged-arc welding rods is not lower than 610MPa, the diameter phi of the submerged-arc welding rods is 5.0mm, and the submerged-arc welding rods are used with sintered flux SJ101Q; welding process parameters include current 630A, voltage about 31V, speed 34cm/min, energy input 35kJ/cm, and flux baking system 350 DEG C*1h; multi-layer multiple welding is performed continuously, and inter-layer temperature is not larger than 210 DEG C. The high-strength Q500qE bridge steel thick plate submerged-arc welding method is simple to operate, efficient, energy saving, and especially applicable to welding of large-span bridge steel thick plates.

Description

A kind of high intensity levels Q500qE bridge steel slab buried arc welding method
Technical field
The present invention relates to a kind of Q500qE high-strength bridge steel slab submerged-arc welding butt welding process method, be applicable to weld tensile strength R m>=650MPa grade high-strength degree science of bridge building thick plate structure steel, it belongs to Longspan Bridge slab and manufactures welding technology field.
Background technology
The Shanghai Changjiang River bridge that China plans to build is the dual-purpose bridge of large span public affairs, iron of 6 line highways, 4 line railways, its main bridge employing span is the highway and railway bi-purpose cable-stayed bridge of 1092 meters, and the logical bridge in Shanghai after building up will become at present public affairs, the iron combined bridge of span maximum in the world.For adapt to Bridges in Our Country construction to high-strength, greatly across the requirement of, heavy duty, the development of high speed aspect, Wuhan Iron and Steel Plant (group) company has developed China a new generation high strength, high tenacity bridge steel plate Q500qE for this bridge, its comprehensive mechanical property has reached external similar steel grade level, is especially also greatly improved carrying high-intensity while low-temperature impact toughness.The raising of substrate performance has proposed urgent requirement to the welding material matching with it and welding procedure.Therefore,, as effectively solved not in time weldability and supporting welding material and the welding procedure problem of Longspan Bridge steel grade, will directly hinder applying of Bridges in Our Country steel and new steel grade.Accelerate to carry out the research of Longspan Bridge steel welding technology and supporting welding material, Bridges in Our Country has been applied to substantial economics and social benefit with steel in large span slab bridge structure manufacturing technology.
Through retrieving: the document of Chinese Patent Application No.: CN201310210442.4, it discloses " a kind of bridge Q500qE Ultra-low carbon Bei Shi steel welding method ".It is: in the time of thickness of slab B>32～44mm, and 80 DEG C of weld preheating temperature; When thickness of slab B>44～60mm, need 100 DEG C of preheatings.The submerged-arc welding groove type that described docking adopts comprises: when the steel plate of thickness of slab B>32～90mm docks, employing bevel angle is the bilateral U-shaped groove of 45 °, and bevel angle is 45 °, and root arc radius is 6mm, and root face is of a size of 4mm.The technological parameter of its docking submerged-arc welding comprises: when the steel plate of thickness of slab B>32～90mm docks, and at root pass, welding current 400～440A, arc voltage 26～28V, weldering speed 16～20m/h, heat input 18.7～27.7kj/cm; Filling and final pass, welding current 560～600A, arc voltage 28～32V, weldering speed 20～24m/h, heat are input as 23.5～28.8 kj/cm; Between road, temperature is all controlled at 80～200 DEG C; Before reverse side welding, to carry out back chipping processing.This patent deficiency mainly at same intensity thickness of slab in 32～44mm scope, before weldering, require 80 DEG C of preheat temperatures, thickness of slab needs 100 DEG C of preheatings in the time of 44～60mm, and the input of the steel plate of thickness of slab B>32～90mm when docking sweating heat is all less than 29kj/cm, and weld procedure specification is narrower.
The patent documentation of Chinese Patent Application No. CN201310282936., it discloses " yield strength >=500MPa level bridge steel large-line energy buried arc welding method ".Its substrate thickness being only suitable for is combined as the butt welding of 32mm uniform thickness, and bevel angle is 60 °, root face 6mm, R6mm; Tensile strength >=the 650MP of coupling welding wire, diameter Ф 4.0mm; Welding: electric current 700 ~ 750A, voltage 32V, speed 30 ~ 26cm/min, heat input 45 ~ 55 kj/cm, solder flux baking regime is 350 DEG C × 1h; Adopt multilayer multiple tracks continuous sequence.
For the construction of large span high strength bridge structure, the key issue of its solution is to ensure under the prerequisite that safety is on active service, and the rear structure of welding is indeformable, flawless produces, and joint has good mechanical property and low-temperature flexibility.But well-known, along with the increase of the intensity of bridge construction base material, especially improving constantly of yield strength, not preheating before weldering, under the not heat treated condition of postwelding, ensures the medium-and-large-sized steel construction anticracking of welding process, the anti-breaking primary key technology that becomes manufacture process.And large-scale steel structure manufacture process is carried out weld preheating, post weld heat treatment means the difficulty of construction environment, manufacturing cost and manufacturing cycle, cannot meet the technical requirement of construction.The invention discloses a kind of crucial welding procedure manufacturing technology of submerged-arc welding of Q500qE high-strength bridge steel slab, its problem mainly solving is the welding technique that not preheating before having proposed a kind of submerged-arc welding process and welding with matching materials welding large span high-strength bridge steel slab banjo fixing butt jointing, postwelding are not heat-treated.
Summary of the invention
The problem that the object of the invention is to mainly solve is that to have proposed a kind of high strength Q500qE bridge steel thickness of slab be the crucial welding procedure manufacturing technology of 50 mm and 60mm submerged-arc welding, its core has proposed a kind of submerged-arc welding process weld with the butt weld of matching materials welding large span high-strength bridge steel slab before not preheating, the postwelding welding method of not heat-treating.
Realize the measure of above-mentioned purpose:
A kind of high intensity levels Q500qE bridge steel slab buried arc welding method, its step:
(1) applicable substrate mechanical property is: yield strength R eL>=500MPa, tensile strength R m>=650MPa, percentage elongation A>=18% ,-40 ocKV 2ballistic work>=120J; Applicable slab is combined as 50mm+50mm, and 60mm+60mm welding manner, and not preheating before weldering, and postwelding is not heat-treated;
(2) submerged-arc welding groove type adopts two-sided U-shaped symmetrical groove, and bevel angle is 60 °, root face 7mm, R7mm;
(3) welding material of coupling: the tensile strength of welding wire for submerged-arc welding is not less than 610MPa, gage of wire Ф 5.0mm, and mate use with sintered flux SJ101Q;
(4) welding condition: welding current 630A, weldingvoltage ~ 31V, speed of welding 34cm/min, weld heat input 35kJ/cm, solder flux baking regime is 350 DEG C × 1h;
(5) adopt multilayer multiple tracks continuous sequence, and control interlayer temperature and be no more than 210 DEG C.
The deposited metal tensile strength R of the welding wire mating with the application's submerged arc welding m>=610MPa, gage of wire Ф 5.0mm.
The chemical composition (% by weight) of its welding wire is: C≤0.10, Si≤0.06, Mn≤2.0, Ni≤0.50, Ti≤0.13, B≤0.010, Cr≤0.20, Mo≤0.50, P≤0.010, S≤0.006.This welding wire mates and welds with sintered flux SJ101Q, and the mechanical property of deposited metal is R el=542MPa, R m=630MPa, A=25%, Z=74% ,-40 DEG C of KV 2ballistic work=143J.
" high-strength bridge steel Q500qE submerged arc thick plates method " disclosed by the invention tool has the following advantages:
(1) the high-strength bridge steel Q500qE submerged arc docking welding method that the present invention proposes, has met the Shanghai Changjiang River large span public affairs that China plans to build, the dual-purpose bridge thick plate structure of iron submerged-arc welding process key manufacture.Joint has good low-temperature flexibility, and joint 3rd district have higher impact flexibility deposit and margin of safety, and-40 of joint 3rd district ocKV 2ballistic work is far above bridge steel banjo fixing butt jointing three district-40 DEG C KV 2>=48J welding performance standard.
(2) adopt welding technique of the present invention, Submerged Arc Welding Joints overheated zone is mainly bainite structure, weld metal is mainly tiny acicular ferrite structure, thereby makes weld seam have good low-temperature impact toughness, and joint has good cracking resistance and good fracture toughness.
(3) adopt welding technique of the present invention to realize the welding procedure that not preheating before the weldering of high-strength bridge steel thick plate structure manufacture process, postwelding are not heat-treated, while adopting multilayer multiple tracks continuous sequence technique, weld seam still has higher ballistic work, joint three district-40 DEG C KV 2ballistic work reaches 108 ~ 193J.
Welding procedure of the present invention is easy and simple to handle, efficient, energy-conservation, is particularly useful for the welding of Longspan Bridge steel thick plate.
Brief description of the drawings
Accompanying drawing is that to adopt steel plate thickness be 50mm or 60mm submerged arc banjo fixing butt jointing groove schematic diagram in the present invention.
Detailed description of the invention
Below the present invention is described in detail:
Various embodiments of the present invention are produced according to following steps, and in institute's limited range any value.
A kind of high intensity levels Q500qE bridge steel slab buried arc welding method, its step:
(1) applicable substrate mechanical property is: yield strength R eL>=500MPa, tensile strength R m>=650MPa, percentage elongation A>=18% ,-40 ocKV 2ballistic work>=120J; Applicable slab is combined as 50mm+50mm, and 60mm+60mm welding manner, and not preheating before weldering, and postwelding is not heat-treated;
(2) submerged-arc welding groove type adopts two-sided U-shaped symmetrical groove, and bevel angle is 60 °, root face 7mm, R7mm;
(3) welding material of coupling: the tensile strength of welding wire for submerged-arc welding is not less than 610MPa, gage of wire Ф 5.0mm, and mate use with sintered flux SJ101Q;
(4) welding condition: welding current 630A, weldingvoltage ~ 31V, speed of welding 34cm/min, weld heat input 35kj/cm, solder flux baking regime is 350 DEG C × 1h;
(5) adopt multilayer multiple tracks continuous sequence, and control interlayer temperature and be no more than 210 DEG C.
Embodiment 1:
Base material: Q500qE, slab combination 50mm+50mm.Test plate (panel) is of a size of 600mm × 400mm × 50mm, and submerged-arc welding groove adopts the symmetrical groove of two-sided U, and bevel angle is 60 °, root face 7mm, R7mm.Matingofwelding material: WQ-6 welding wire, solder flux is SJ101Q, the mechanical property of deposited metal is R el=542MPa, R m=630 MPa, A=25%, Z=74% ,-40 DEG C of KV 2ballistic work=143J.Dock welding with Q500qE steel (50mm+50mm) slab, welding material is WQ-6 welding wire, gage of wire Ф 5.0mm; Weld procedure specification: welding current 630(A), weldingvoltage 31(V), speed of welding ~ 34 (cm/min), weld heat input 35 (kj/cm); Submerged-arc welding docking adopts multilayer multiple tracks continuous sequence, interlayer temperature be controlled at 170 ~ 180 (DEG C), not preheating before weldering, postwelding are not heat-treated.
Adopt the banjo fixing butt jointing of said welding method welding, through its mechanical property is detected, its weld seam tensile strength R m=655MPa, joint clod wash d=3a, 180 ° are qualified, weld seam ballistic work-40 DEG C KV 2=156J, melt run ballistic work-40 DEG C KV 2=129 J, heat affected area (1mm)-40 DEG C KV 2=183J.
Embodiment 2:
Base material: Q500qE, slab combination 60mm+60mm.Test plate (panel) is of a size of 600mm × 400mm × 60mm, and submerged-arc welding groove adopts the symmetrical groove of two-sided U, and bevel angle is 60 °, root face 7mm, R7mm.Matingofwelding material: WQ-6 welding wire, solder flux is SJ101Q,, the mechanical property of deposited metal is R el=542MPa, R m=630MPa, A=25%, Z=74% ,-40 DEG C of KV 2ballistic work=143J.With the welding of Q500qE steel (60mm+60mm) slab banjo fixing butt jointing, welding material is WQ-6 welding wire, gage of wire Ф 5.0mm; Weld procedure specification: welding current 630(A), weldingvoltage 31(V), speed of welding ~ 34 (cm/min), weld heat input 35 (kj/cm); Submerged-arc welding docking adopts multilayer multiple tracks continuous sequence, interlayer temperature be controlled at 190 ~ 210 (DEG C), not preheating before weldering, postwelding are not heat-treated.
Adopt the banjo fixing butt jointing of said welding method welding, through its mechanical property is detected, its weld seam tensile strength R m=681MPa, joint clod wash d=3a, 180 ° are qualified, weld seam ballistic work-40 DEG C KV 2=130J, melt run ballistic work-40 DEG C KV 2=108J, heat affected area (1mm)-40 DEG C KV 2=193J.
Embodiment 3:
Base material: Q500qE, slab combination 60mm+60mm.Test plate (panel) is of a size of 600mm × 400mm × 60mm, and submerged-arc welding groove adopts the symmetrical groove of two-sided U, and bevel angle is 60 °, root face 7mm, R7mm.Matingofwelding material: WQ-6 welding wire, solder flux is SJ101Q,, the mechanical property of deposited metal is R el=542MPa, R m=630MPa, A=25%, Z=74% ,-40 DEG C of KV 2ballistic work=143J.With the welding of Q500qE steel (60mm+60mm) slab banjo fixing butt jointing, welding material is WQ-6 welding wire, gage of wire Ф 5.0mm; Weld procedure specification: welding current 630(A), weldingvoltage 31(V), speed of welding ~ 34 (cm/min), weld heat input 35 (kj/cm); Submerged-arc welding docking adopts multilayer multiple tracks continuous sequence, interlayer temperature be controlled at 190 ~ 210 (DEG C), not preheating before weldering, postwelding are not heat-treated.
Adopt the banjo fixing butt jointing of said welding method welding, through its mechanical property is detected, its weld seam tensile strength R m=680MPa, joint clod wash d=3a, 180 ° are qualified, weld seam ballistic work-40 DEG C KV 2=118J, melt run ballistic work-40 DEG C KV 2=107J, heat affected area (1mm)-40 DEG C KV 2=175J.
This detailed description of the invention only exemplifies for the best, not the restricted enforcement to technical solution of the present invention.

Claims (1)

1. a high intensity levels Q500qE bridge steel slab buried arc welding method, its step:
(1) applicable substrate mechanical property is: yield strength R eL>=500MPa, tensile strength R m>=650MPa, percentage elongation A>=18% ,-40 ocKV 2ballistic work>=120J; Applicable slab is combined as 50mm+50mm, and 60mm+60mm welding manner, and not preheating before weldering, and postwelding is not heat-treated;
(2) submerged-arc welding groove type adopts two-sided U-shaped symmetrical groove, and bevel angle is 60 °, root face 7mm, R7mm;
(3) welding material of coupling: the tensile strength of welding wire for submerged-arc welding is not less than 610MP, gage of wire Ф 5.0mm, and mate use with sintered flux SJ101Q;
(4) welding condition: welding current 630A, weldingvoltage ~ 31V, speed of welding 34cm/min, weld heat input 35kJ/cm, solder flux baking regime is 350 DEG C × 1h;
(5) adopt multilayer multiple tracks continuous sequence, and control interlayer temperature and be no more than 210 DEG C.
CN201410137615.9A 2014-04-08 2014-04-08 High-strength Q500qE bridge steel thick plate submerged-arc welding method Pending CN103894710A (en)

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Cited By (9)

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Publication number Priority date Publication date Assignee Title
CN104999169A (en) * 2015-07-31 2015-10-28 武汉钢铁(集团)公司 Submerged arc welding method for ultrafast cooled steel with lower yield strength (Rel) being 500 MPa
CN108672903A (en) * 2018-06-05 2018-10-19 东北大学 A kind of buried arc welding method of bridge low-carbon Q420qNH weathering steels
CN108746945A (en) * 2018-05-21 2018-11-06 武汉钢铁有限公司 A kind of tensile strength >=810MPa bridge steel thick plate submerged arc complex welding methods
CN109249148A (en) * 2018-11-20 2019-01-22 江苏敦邦钢结构工程有限公司 A kind of assembling type steel structure construction steel structure slab submerged-arc welding docking structure
CN111014958A (en) * 2019-12-20 2020-04-17 渤海造船厂集团有限公司 Thick steel plate double-sided laser-MAG composite large-truncated-edge backing welding method
CN111843258A (en) * 2020-06-02 2020-10-30 中煤北京煤矿机械有限责任公司 Welding method for creep-resistant steel of hydraulic support
CN113523507A (en) * 2021-06-15 2021-10-22 江苏中铁山桥重工有限公司 Q500qENH and Q690qENH composite welding method for bridge
CN114749763A (en) * 2022-04-28 2022-07-15 鞍钢股份有限公司 Transverse narrow-gap welding method for steel for ocean platform
WO2023029279A1 (en) * 2021-09-01 2023-03-09 南京钢铁股份有限公司 Multi-wire submerged arc welding method for q370qe thick plate

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Cited By (12)

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Publication number Priority date Publication date Assignee Title
CN104999169A (en) * 2015-07-31 2015-10-28 武汉钢铁(集团)公司 Submerged arc welding method for ultrafast cooled steel with lower yield strength (Rel) being 500 MPa
CN108746945A (en) * 2018-05-21 2018-11-06 武汉钢铁有限公司 A kind of tensile strength >=810MPa bridge steel thick plate submerged arc complex welding methods
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CN108672903A (en) * 2018-06-05 2018-10-19 东北大学 A kind of buried arc welding method of bridge low-carbon Q420qNH weathering steels
CN109249148A (en) * 2018-11-20 2019-01-22 江苏敦邦钢结构工程有限公司 A kind of assembling type steel structure construction steel structure slab submerged-arc welding docking structure
CN109249148B (en) * 2018-11-20 2024-03-15 江苏敦邦钢结构工程有限公司 Submerged arc welding butt joint structure of steel structure thick plate for assembled steel structure building
CN111014958A (en) * 2019-12-20 2020-04-17 渤海造船厂集团有限公司 Thick steel plate double-sided laser-MAG composite large-truncated-edge backing welding method
CN111843258A (en) * 2020-06-02 2020-10-30 中煤北京煤矿机械有限责任公司 Welding method for creep-resistant steel of hydraulic support
CN113523507A (en) * 2021-06-15 2021-10-22 江苏中铁山桥重工有限公司 Q500qENH and Q690qENH composite welding method for bridge
WO2023029279A1 (en) * 2021-09-01 2023-03-09 南京钢铁股份有限公司 Multi-wire submerged arc welding method for q370qe thick plate
CN114749763A (en) * 2022-04-28 2022-07-15 鞍钢股份有限公司 Transverse narrow-gap welding method for steel for ocean platform
CN114749763B (en) * 2022-04-28 2023-09-26 鞍钢股份有限公司 Transverse narrow gap welding method for steel for ocean platform

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