CN103934585A - Manual welding method used for pressure container steel thick plates with tensile strength larger than or equal to 610 MPa - Google Patents

Manual welding method used for pressure container steel thick plates with tensile strength larger than or equal to 610 MPa Download PDF

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Publication number
CN103934585A
CN103934585A CN201410159639.4A CN201410159639A CN103934585A CN 103934585 A CN103934585 A CN 103934585A CN 201410159639 A CN201410159639 A CN 201410159639A CN 103934585 A CN103934585 A CN 103934585A
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welding
tensile strength
mpa
thick plates
manual
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CN201410159639.4A
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CN103934585B (en
Inventor
缪凯
胡因洪
牟文广
黄治军
李立军
陈浮
许颖
胡家国
王靓
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Wuhan Iron and Steel Co Ltd
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Wuhan Iron and Steel Group Corp
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Priority claimed from CN201410159639.4A external-priority patent/CN103934585B/en
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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
    • B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
    • 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
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • B23K35/3053—Fe as the principal constituent
    • B23K35/3073—Fe as the principal constituent with Mn as next major constituent
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/18—Sheet panels

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Arc Welding In General (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

The invention relates to a manual welding method used for pressure container steel thick plates with the tensile strength larger than or equal to 610 MPa. The mechanical properties of base materials are as follows: Rm >= 610 MPa, ReL >= 490 MPa, the elongation A >= 17%, and -40 DEG C KV2 >=54J; the base materials are equal thick plates with the thickness of 28 mm and equal thick plates with the thickness of 44 mm, and the equal thick plates are butt-welded; according to the welding material, the Rm of welding rods is not lower than 610 MPa, and the diameter phi of the welding rods is 4.0 mm; a groove is a double-faced V-shaped symmetric groove, the angle of the groove is 55 degrees, and the length of the truncated edge is 3 mm; preheating is not performed before welding, and thermal treatment is not performed after welding; according to the welding parameters, the current ranges from 170 A to 185 A, the voltage ranges from 27 V to 28 V, the speed ranges from 16 cm/min to 17 cm/min, the linear energy ranges from 17 kj/cm to 19 kj/cm, and the baking rule is 400 DEG C * 1 h; multilayer multi-pass continuous welding is applied. According to the manual welding method, the Rm of a joint >= 700 MPa, the -40 DEG C KV2 of a welding joint >= 91 J, the -40 DEG C KV2 of a fusion line >= 136 J, the -40 DEG C KV2 of a heat-affected zone (2 mm) >= 122 J, the -40 DEG C KV2 of a heat-affected zone (5 mm) >= 152 J, and the -40 DEG C KV2 of a heat-affected zone (20 mm) >=173 J.

Description

A kind of for tensile strength >=610MPa pressure vessel steel thick plate manual welding method
Technical field
The present invention relates to a kind of large pressurized vessel steel steel thick plate manual welding technique method, be applicable to tensile strength and be greater than the thick plate structure manual welding of 610MPa grade high-strength degree pressure vessel steel, it belongs to large pressurized vessel steel steel thick plate structure and manufactures welding technology field.
Background technology
Along with the design of Chinese large-sized pressure vessel steel is progressively to high parameter, the development of maximization aspect.For adapting to the construction needs of all kinds of container storage tanks, Wuhan Iron and Steel Plant has been researched and developed a kind of tensile strength and has been>=610MPa, yield strength R eL>=490MPa, percentage elongation A>=17%, ballistic work-40 oc KV 2the pressure vessel steel steel plate of>=54J, its comprehensive mechanical property is better than external similar steel grade level, and especially-40 DEG C of low-temperature flexibilities have excellent obdurability coupling.The exploitation of this steel grade has proposed urgent requirement to the welding material matching with it and welding procedure.
Just at present, adopt the existing 600MPa of being greater than level manual welding material to mate with welding procedure, the deficiency existing is: deposited metal ballistic work and actual joint toughness far can not meet the solder technology requirement that high-strength large-scale thick plate structure is manufactured, especially compared with the base material of high tenacity, its-40 DEG C of cryomechanics indexs are too wide in the gap, can not meet large pressurized vessel steel thick plate structure and manufacture solder technology index request; The in the situation that of large-line energy and multilayer welding, joint low temperature impact properties cannot meet large pressurized vessel steel thick plate structure and manufacture solder technology index request.
Through retrieving: Chinese Patent Application No. is application number: CN200910062436.2 document 3 discloses a kind of bridge steel and engineering steel manual welding method that tensile strength is 690～760MPa rank that be applicable to.Measure: a kind of for high strength steel docking manual welding method, its welding step: employing tensile strength is that 690～760MPa, yield strength are 600～660MPa, percentage elongation: 18～25% ,-40 DEG C of KV 2: the high-strength steel of 165～210J, its thickness is the identical thickness of slab combination of 26～50mm docking; The welding rod tensile strength of coupling is greater than 700MPa, diameter of phi 4.0mm; Manual welding groove adopts the asymmetric 60 ° of grooves of two-sided V-type, root face 2mm; Welding current 160A, voltage 26V, speed 15cm/min, heat input 17kj/cm, adopt continuous sequence and weld seam filled up, and interlayer temperature is controlled at 100～150 DEG C.Not preheating before weldering, postwelding do not need heat treatment.Chinese Patent Application No. is that CN201310282949.0 document 4 discloses a kind of yield strength>=500MPa level bridge steel manual welding method, applicable substrate performance: R eL>=500MPa, R m>=650MPa, A>=18% ,-40 DEG C of KV 2>=120J; Thickness of slab is combined as 32mm uniform thickness; Bevel for welding form is two-sided V-type symmetry, and bevel angle is 60 °, root face 2mm; Tensile strength>=the 650MPa of coupling welding rod, core diameter Ф 4.0mm; Welding: electric current 165 ~ 175A, voltage 25 ~ 26V, speed ~ 15cm/min, heat input 17 ~ 18kj/cm, welding rod baking regime is 350 DEG C × 1h; Adopt multilayer multiple tracks continuous sequence.And not preheating before weldering, not heat treatment of postwelding.Patent documentation 4 scope of applications are mainly used in the construction of large span high strength bridge structure, and 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.Patent documentation 3 is for being applicable to bridge steel and the engineering steel manual welding method that tensile strength is 690～760MPa rank, patent documentation 4 for being applicable to tensile strength is>=the structural steel for bridge manual welding method of 650MPa rank, and its difference is different welding material and different welding procedure, different military service technical conditions (40 DEG C of KV 2>=48J).And this patent is applicable to tensile strength is>=and the large pressurized vessel structural steel manual welding method of 650MPa rank, its welding material and welding procedure, military service technical conditions (40 DEG C of KV 2>=54J) all requirement is stricter.As everyone knows, along with the increase of intensity rank and the thickness of slab of steel grade, large pressurized vessel structural steel welding anticracking is the key technology difficult point that container is built.Its core innovative point of this patent is to have proposed the welding technique that not preheating before the butt weld weldering of a kind of manual welding technique and matching materials welding large pressurized vessel structural steel slab, postwelding are not heat-treated.
Summary of the invention
The object of the invention is to solve current manual welding technique and the existing problem of not mating, can not meet the demands of matching materials welding large pressurized vessel steel slab, proposing a kind of welding tensile strength is >=610MPa, deposited metal ballistic work and actual joint toughness can meet the demands, joint low temperature impact properties is good, and not preheating before manufacture process weldering, postwelding do not heat-treat for tensile strength >=610MPa pressure vessel steel thick plate manual welding method.
Realize above-mentioned purpose technology contents:
A kind of for tensile strength >=610MPa pressure vessel steel thick plate manual welding method, its welding step:
1) base material mechanical property: adopt tensile strength to be>=610MPa, yield strength R eL>=490MPa, percentage elongation A>=17%, ballistic work-40 oc KV 2>=54J; The thickness that adopts base material is the slab combination banjo fixing butt jointings such as 28mm+28mm or 44mm+44mm; The welding material of coupling: welding rod tensile strength is not less than 610MPa, core diameter Ф 4.0mm;
2) manual welding groove adopts the symmetrical groove of two-sided V-type, and bevel angle is 55 °, and root face is 3mm;
3) not preheating before employing weldering, postwelding is Technology for Heating Processing not;
4) welding condition: welding current 170 ~ 185A, weldingvoltage 28 ~ 27V, speed of welding 17 ~ 16cm/min, weld heat input 17 ~ 19kj/cm, welding rod baking regime is 400 DEG C × 1h;
5) adopt multilayer multi-pass continuous sequence, interlayer temperature is controlled at 170 ~ 200 DEG C.
It is characterized in that: deposited metal chemical constituent and the percentage by weight of described welding rod are: C 0.07 ~ 0.09%, Mn 1.60 ~ 2.0%, Si≤0.30 ~ 0.40%, Ni 0.50 ~ 0.70%, P≤0.013%, S≤0.009%, all the other are Fe.
Compared with prior art, tool has the following advantages in the present invention:
(1) a kind of high-strength pressure vessel steel slab manual welding technique method disclosed by the invention, has met the crucial manual welding process manufacturing technology of Chinese large-sized pressure vessel steel tank thick plate structure steel.Manual welding butt joint tensile strength, joint three district's ballistic works reach higher level, and joint has good low-temperature impact toughness and safety stock, i.e. joint tensile strength R m>=700MPa, weld seam ballistic work-40 DEG C KV 2>=91J, melt run-40 DEG C KV 2>=136J, heat affected area (2mm)-40 DEG C KV 2>=122J, heat affected area (5mm)-40 DEG C KV 2>=152J, heat affected area (20mm)-40 DEG C KV 2>=173J.
(2) adopt welding technique of the present invention, manual welding joint overheated zone is mainly bainite structure, and weld metal is mainly tiny acicular ferrite structure, thereby makes weld seam have good obdurability mechanical property and cracking resistance.
(3) adopt welding technique of the present invention to realize not preheating before large pressurized vessel steel steel butt joint thick plate structure manufacture process weldering, the welding procedure that postwelding is not heat-treated, while adopting multilayer multiple tracks continuous sequence technique, joint has good comprehensive mechanical property.
Welding technique of the present invention has good welding technological properties, and easy and simple to handle, applicable convenient, efficient, energy-conservation and applicable factory large pressurized vessel steel tank steel making is applied.
Brief description of the drawings
Accompanying drawing is groove shape and structure schematic diagram of the present invention.
Detailed description of the invention
Illustrate: deposited metal chemical constituent and the percentage by weight of following embodiment welding rod used all exist: C 0.07 ~ 0.09%, Mn 1.60 ~ 2.0%, Si≤0.30 ~ 0.40%, Ni 0.50 ~ 0.70%, P≤0.013%, S≤0.009%, in all the other scopes that are Fe.
Embodiment 1:
Base material: the mechanical property after modified: tensile strength is 658MPa, yield strength R eL: 586MPa, percentage elongation A:21%, ballistic work-40 oc KV 2: 223J; Be combined as 28mm+28mm Deng thickness of slab; Test plate (panel) is of a size of 600mm × 400mm × 28mm, and manual butt welding groove adopts double V-shaped symmetrical groove, and bevel angle is 55 °, root face 3mm;
Welding material: welding rod CHF607RH, diameter Ф 4.0mm; The mechanical property of welding rod deposited metal is R el=550MPa, R m=640 MPa, A=26%, ballistic work-40 DEG C KV 2=80J;
Manual welding technique: welding current 170(A), weldingvoltage 28(V), speed of welding ~ 17 (cm/min), weld heat input ~ 17 (kj/cm), welding rod baking regime is 400 DEG C × 1h; Manual welding docking adopts multilayer multiple tracks continuous sequence, interlayer temperature be controlled at 170 ~ 190 (DEG C), the welding procedure that not preheating before weldering, postwelding are not heat-treated.
After testing, adopt the joint mechanical property of said welding method welding to be: joint tensile strength R m=700MPa, weld seam ballistic work-40 DEG C KV 2=109J, melt run-40 DEG C KV 2=139J, heat affected area (2mm)-40 DEG C KV 2=157 J, heat affected area (5mm)-40 DEG C KV 2=238 J, heat affected area (20mm)-40 DEG C KV 2=225 J.
Embodiment 2:
Base material: the mechanical property after modified: tensile strength is 664MPa, yield strength R eL: 606MPa, percentage elongation A:20%, ballistic work-40 oc KV 2: 183J; Be combined as 44mm+44mm Deng thickness of slab, test plate (panel) is of a size of 600mm × 400mm × 44mm, and manual butt welding groove adopts double V-shaped symmetrical groove, and bevel angle is 55 °, root face 3mm;
Welding material: adopt CHF607RH welding rod coupling to weld, its diameter Ф 4.0mm; The mechanical property of welding rod deposited metal is R el=550MPa, R m=640 MPa, A=26% ,-40 DEG C of KV 2ballistic work=80J;
Welding procedure: welding current 180(A), weldingvoltage 27(V), speed of welding ~ 16 (cm/min), weld heat input ~ 18 (kj/cm), welding rod baking regime is 400 DEG C × 1h; Manual welding docking adopts multilayer multiple tracks continuous sequence, interlayer temperature be controlled at 180 ~ 190 (DEG C), the welding procedure that not preheating before weldering, postwelding are not heat-treated.
After testing, adopt the joint mechanical property of said welding method welding to be: joint tensile strength R m=710MPa, weld seam ballistic work-40 DEG C KV 2=97J, melt run-40 DEG C KV 2=156J, heat affected area (2mm)-40 DEG C KV 2=158 J, heat affected area (5mm)-40 DEG C KV 2=167J, heat affected area (20mm)-40 DEG C KV 2=192 J.
Embodiment 3:
Base material: the mechanical property after modified: tensile strength is 664MPa, yield strength R eL: 606MPa, percentage elongation A:20%, ballistic work-40 oc KV 2: 183J; Be combined as 44mm+44mm Deng thickness of slab, test plate (panel) is of a size of 600mm × 400mm × 44mm, and manual butt welding groove adopts double V-shaped symmetrical groove, and bevel angle is 55 °, root face 3mm;
Welding material: adopt CHF607RH welding rod coupling to weld, its core diameter is Ф 4.0mm; The mechanical property of welding rod deposited metal is R el=550MPa, R m=640 MPa, A=26% ,-40 DEG C of KV 2ballistic work=80J;
Welding procedure: welding current 185(A), weldingvoltage 28(V), speed of welding ~ 16 (cm/min), weld heat input ~ 19 (kj/cm), welding rod baking regime is 400 DEG C × 1h; Manual welding docking adopts multilayer multiple tracks continuous sequence, interlayer temperature be controlled at 190 ~ 200 (DEG C), the welding procedure that not preheating before weldering, postwelding are not heat-treated.
After testing, adopt the joint mechanical property of said welding method welding: joint tensile strength R m=710MPa, weld seam ballistic work-40 DEG C KV 2=91J, melt run-40 DEG C KV 2=136J, heat affected area (2mm)-40 DEG C KV 2=122 J, heat affected area (5mm)-40 DEG C KV 2=152J, heat affected area (20mm)-40 DEG C KV 2=173J.
Above-described embodiment only exemplifies for the best, and is not the restriction to embodiments of the present invention.

Claims (2)

1. for tensile strength >=610MPa pressure vessel steel thick plate manual welding method, its welding step:
1) base material mechanical property: adopt tensile strength to be>=610MPa, yield strength R eL>=490MPa, percentage elongation A>=17%, ballistic work-40 oc KV 2>=54J; The thickness that adopts base material is the slab combination banjo fixing butt jointings such as 28mm+28mm or 44mm+44mm; The welding material of coupling: welding rod tensile strength is not less than 610MPa, core diameter Ф 4.0mm;
2) manual welding groove adopts the symmetrical groove of two-sided V-type, and bevel angle is 55 °, and root face is 3mm;
3) not preheating before employing weldering, postwelding is Technology for Heating Processing not;
4) welding condition: welding current 170 ~ 185A, weldingvoltage 28 ~ 27V, speed of welding 17 ~ 16cm/min, weld heat input 17 ~ 19kj/cm, welding rod baking regime is 400 DEG C × 1h;
5) adopt multilayer multi-pass continuous sequence, interlayer temperature is controlled at 170 ~ 200 DEG C.
2. one as claimed in claim 1 is for tensile strength >=610MPa pressure vessel steel thick plate manual welding method, it is characterized in that: deposited metal chemical constituent and the percentage by weight of described welding rod are: C 0.07 ~ 0.09%, Mn 1.60 ~ 2.0%, Si≤0.30 ~ 0.40%, Ni 0.50 ~ 0.70%, P≤0.013%, S≤0.009%, all the other are Fe.
CN201410159639.4A 2014-04-21 A kind of for tensile strength >=610MPa pressure vessel steel thick plate manual welding method Expired - Fee Related CN103934585B (en)

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Application Number Priority Date Filing Date Title
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005125348A (en) * 2003-10-22 2005-05-19 Nippon Steel Corp Large heat input butt welded joint superior in brittle fracture characteristic resistance
CN101564791A (en) * 2009-06-05 2009-10-28 武汉钢铁(集团)公司 Submerged arc-welding method of steel for high strength pressure vessel
CN101564783A (en) * 2009-06-05 2009-10-28 武汉钢铁(集团)公司 Manual welding method applied to butt joint of high-tensile steel
CN102784998A (en) * 2012-08-08 2012-11-21 武汉钢铁(集团)公司 Butt-joint manual welding method for high-strength bridge steel with thickness of 80 mm
CN103264207A (en) * 2013-05-24 2013-08-28 武汉钢铁(集团)公司 Method for butt-joint manual welding of high-strength nuclear power steel

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005125348A (en) * 2003-10-22 2005-05-19 Nippon Steel Corp Large heat input butt welded joint superior in brittle fracture characteristic resistance
CN101564791A (en) * 2009-06-05 2009-10-28 武汉钢铁(集团)公司 Submerged arc-welding method of steel for high strength pressure vessel
CN101564783A (en) * 2009-06-05 2009-10-28 武汉钢铁(集团)公司 Manual welding method applied to butt joint of high-tensile steel
CN102784998A (en) * 2012-08-08 2012-11-21 武汉钢铁(集团)公司 Butt-joint manual welding method for high-strength bridge steel with thickness of 80 mm
CN103264207A (en) * 2013-05-24 2013-08-28 武汉钢铁(集团)公司 Method for butt-joint manual welding of high-strength nuclear power steel

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Effective date of registration: 20170711

Address after: 430083 Qingshan District, Hubei, Wuhan factory before the door No. 2

Patentee after: WUHAN IRON AND STEEL Co.,Ltd.

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Granted publication date: 20161130