CN101823186A - Welding method of ocean platform module wall board gas shielded flux-cored down weld - Google Patents

Welding method of ocean platform module wall board gas shielded flux-cored down weld Download PDF

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Publication number
CN101823186A
CN101823186A CN200910079311A CN200910079311A CN101823186A CN 101823186 A CN101823186 A CN 101823186A CN 200910079311 A CN200910079311 A CN 200910079311A CN 200910079311 A CN200910079311 A CN 200910079311A CN 101823186 A CN101823186 A CN 101823186A
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China
Prior art keywords
welding
cored
welding method
platform module
ocean platform
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CN200910079311A
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Chinese (zh)
Inventor
杨炳发
曹军
徐玉强
王福祥
韦生
孙有辉
马丽
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China National Offshore Oil Corp CNOOC
Offshore Oil Engineering Co Ltd
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China National Offshore Oil Corp CNOOC
Offshore Oil Engineering Co Ltd
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Priority to CN200910079311A priority Critical patent/CN101823186A/en
Publication of CN101823186A publication Critical patent/CN101823186A/en
Pending legal-status Critical Current

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Abstract

The invention provides a welding method of an ocean platform module wall board gas shielded flux-cored down weld, comprising the following steps of: preparing a welding joint groove and cleaning; assembling interfaces at the joint of two wall boards; preheating a welded position before welding; and carrying out preparing working procedures such as setting a welding method and welding parameters, setting welding materials and setting shielding gas and parameters, welding working procedure and treatment working procedure after welding, wherein the welding materials in the preparing working procedure before welding are set to be flux-cored welding wire, and the shielding gas is set to be CO2. The welding method has the improvement in that the welding joint groove in the preparing working procedure before welding is I-shaped, and the welding way is set to be vertical down weld. The invention can improve the welding speed, achieves attractive welded joint formation, greatly lowers the welding distortion, reduces the workload for wall welding deformation correction after welding and welded joint polishing, and efficiently improves the working efficiency.

Description

The welding method of ocean platform module wall board gas shielded flux-cored down weld
Technical field
The present invention relates to welding method, relate in particular to a kind of welding method of ocean platform module wall board gas shielded flux-cored down weld.
Background technology
Wall on the ocean platform module mainly comprises windbreak and fire wall, and the wall dermatotome material of this windbreak and fire wall is generally carbon steel, and this carbon steel model is Q235B, and the thickness of wall dermatotome is between 6 to 10mm.Because flaggy thickness is less, the deflection of flaggy is bigger when therefore welding, and postwelding often needs straightening could satisfy the processing dimension requirement, therefore, overcomes the welding deformation of wall dermatotome, is the problem that the sector need solve always.Welding methods such as manual electric arc welding, CO 2 gas-shielded medicine core up hill welding, STT (surface tension transition) weldering are adopted in the welding of chunk wall dermatotome usually; these processes can solve the welding deformation problem of chunk wall dermatotome to a certain extent, but can not effectively control the welding deformation of chunk wall dermatotome.Therefore, improve the welding method of chunk wall dermatotome, the control welding deformation is increased work efficiency, and is necessary.
Summary of the invention
Main purpose of the present invention is to overcome the above-mentioned shortcoming that existing product exists, and provide a kind of welding method of ocean platform module wall board gas shielded flux-cored down weld, have the advantages that speed of welding is fast, fusion penetration is shallow, hot input quantity is little, be fit to the welding of wall dermatotome class thin plate; Can improve speed of welding, effectively control the welding deformation of wall dermatotome; Reduce post welding distortion and correct workload, increase work efficiency; Can also make the welding bead moulding attractive in appearance, reduce postwelding polishing workload, reduce construction cost.
The objective of the invention is to realize by following technical scheme.
The welding method of ocean platform module wall board gas shielded flux-cored down weld of the present invention, it comprises, preparation grooves of welding joints and cleaning, assembling two wall dermatotome joint interfaces, welding portion carried out weld preheating, sets welding method and welding parameter, setting welding material and sets the weldering of protective gas and parameter before preparatory process, welding operation and after welding treatment operation; Welding material is set at flux-cored wire in the preceding preparatory process of this weldering, and protective gas is set at carbon dioxide; It is characterized in that the grooves of welding joints for preparing in the preparatory process before this weldering is the I font, welding method is set at upright weldering downwards.
The welding method of aforesaid ocean platform module wall board gas shielded flux-cored down weld, wherein, the groove gap of I font groove is 5 ± 2mm.
The welding method of aforesaid ocean platform module wall board gas shielded flux-cored down weld, wherein, welding material is the safe flux-cored wire in sky, Kunshan, and the model of this welding wire is E71T-1TWE-711, and gage of wire is 1.2mm.
The welding method of aforesaid ocean platform module wall board gas shielded flux-cored down weld, wherein, the welding parameter of setting in the preparatory process before the weldering is that welding arc voltage is 19 to 22V, and welding current is 160 to 210A, and speed of welding is 100 to 400mm/min.
The welding method of aforesaid ocean platform module wall board gas shielded flux-cored down weld, wherein, welding method adopts the mode of tow sides single-run welding, and control full swing width is 10 ± 3mm, and the welding position is full position, and welding direction is for downwards upright.
The beneficial effect of the welding method of ocean platform module wall board gas shielded flux-cored down weld of the present invention, this method has the advantages that speed of welding is fast, fusion penetration is shallow, hot input quantity is little, is fit to the welding of wall dermatotome class thin plate; This method is protected medicine core up hill welding with existing carbon dioxide and is compared, the upright seam welding speed of wall dermatotome can improve 1 to 2 times, can effectively control simultaneously the welding deformation of wall dermatotome, reduce post welding distortion and correct workload, increase work efficiency, can also make the welding bead moulding attractive in appearance, reduce postwelding polishing workload, reduce construction cost.
The specific embodiment
The welding method of ocean platform module wall board gas shielded flux-cored down weld of the present invention, it comprises, preparation grooves of welding joints and cleaning, assembling two wall dermatotome joint interfaces, welding portion carried out weld preheating, sets welding method and welding parameter, setting welding material and sets the weldering of protective gas and parameter before preparatory process, welding operation and after welding treatment operation; Welding material is set at flux-cored wire in the preceding preparatory process of this weldering, and protective gas is set at carbon dioxide; Its improvements are that the grooves of welding joints for preparing in the preparatory process before this weldering is the I font, and welding method is set at upright weldering downwards.
The welding method of ocean platform module wall board gas shielded flux-cored down weld of the present invention, wherein, the groove crack of I font groove is 5 ± 2mm; Welding material is the safe flux-cored wire in sky, Kunshan, and the model of this welding wire is E71T-1TWE-711, and gage of wire is 1.2mm; The welding parameter of setting in the preparatory process before the weldering is that welding arc voltage is 19 to 22V, and welding current is 160 to 210A, and speed of welding is 100 to 400mm/min; Welding method adopts the mode of tow sides single-run welding, and control full swing width is 10 ± 3mm, and the welding position is full position, and welding direction is for downwards upright.
Embodiment one:
Carbon steel wall dermatotome to ocean platform module welds.The material of wall dermatotome is steel, and model is GB712-2000Q235B, and flaggy thickness is 10mm, uses the welding method of the CO 2 gas-shielded medicine core of the present invention down hill welding to weld:
One, prepare before the weldering:
1. prepare groove, the polishing group is to groove, and groove type is the I type, and the groove crack is 5mm, and to the cleaning of polishing of the scope of groove and both sides 15mm, until exposing metallic luster;
2. to 15mm scope polishing around the double-edged groove of steel plate, remove impurity such as greasy dirt iron rust;
3. weld preheating, to welding portion and carry out preheating in the scope of 75mm on every side, preheat temperature is 28 ℃, pre-heating mean adopts roasting heating;
4. welding material adopts the safe flux-cored wire in sky, Kunshan, and model is the E71T-1TWE-711 welding wire, and diameter is 1.2mm;
5. protective gas is selected carbon dioxide (CO for use 2), gas purity is 99.95%.
Two, welding adopts carbon dioxide (CO 2) gas shield medicine core down hill welding welds:
1. set welding parameter, the control welding arc voltage is 22V, and welding current is 180A, and speed of welding is 280mm/min, and shield gas flow rate is 21L/min;
2. setting welding manner is the single track multilayer welding, and the full swing width is 13mm, and the welding position is 3G, upright welding downwards.
Three, after welding treatment:
Postwelding carries out suitable polishing to welding bead to be cleared up, and removal face of weld and metal on every side splash, and make face of weld and smooth on every side, so that carry out next step performance test.
Four, postwelding butt welded seam sample carries out Performance Detection, crack length<3mm under 180 ° of conditions of clod wash; Tensile strength>375MPa, yield strength>235MPa, deposited metal elongation after fracture>26%, hardness<270HV10; The every index of welding point meets AWS D1.1 (AWS " steel construction welding conditions D1.1 ") code requirement.
The welding bead moulding is good, and width is even, and reinforcement is moderate, meets the Welding Testing requirement, welding bead smooth surface, flawless, weld defects such as undercut.
Among the embodiment of wall skin welding method of the present invention, the content that does not describe is a prior art, so, do not give unnecessary details in detail.
The effect and the advantage of wall skin welding method of the present invention are:
1, speed of welding is fast, is subjected to gravity effect molten bath molten iron to dirty during down hill welding, and the heap that has reduced molten iron covers, and welding bead is narrowed down, and therefore can reduce the metal filled amount of cladding, increases speed of welding; The base metals of simultaneously dirty molten iron before to welding direction can play pre-heat effect, reduces the welding heat demand, and raising speed of welding that can be suitable, speed of welding are 1~2 times of existing welding method speed of welding.
2, welding deformation is little, and the welding parameter of down hill welding is little, and speed of welding is fast, therefore hot input quantity little (the heat input is directly proportional with welding parameter, is inversely proportional to speed of welding).Because reducing of hot input quantity corrected so steel plate because of the temperature distortion amount can diminish thereupon, makes postwelding not need to carry out welding deformation substantially.
3, the welding bead moulding is attractive in appearance, is subjected to gravity effect molten bath molten iron to dirty during down hill welding, compares with upright upwards welding procedure, can reduce the molten bath molten iron covers at the heap of welding bead, make the welding bead uniform in shaping, the surface is more smooth, smooth, so the workload of postwelding polishing significantly reduces.
4, reduction construction cost, postwelding is corrected and postwelding polishing workload owing to reduce, and speed of welding is fast, makes the welding equipment minimizing duration of runs, can significantly reduce human input and energy resource consumption, thereby reduce construction cost.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did.

Claims (5)

1. the welding method of an ocean platform module wall board gas shielded flux-cored down weld, it comprises, preparation grooves of welding joints and cleaning, assembling two wall dermatotome joint interfaces, welding portion carried out weld preheating, sets welding method and welding parameter, setting welding material and sets the weldering of protective gas and parameter before preparatory process, welding operation and after welding treatment operation; Welding material is set at flux-cored wire in the preceding preparatory process of this weldering, and protective gas is set at carbon dioxide; It is characterized in that the grooves of welding joints for preparing in the preparatory process before this weldering is the I font, welding method is set at upright weldering downwards.
2. the welding method of ocean platform module wall board gas shielded flux-cored down weld according to claim 1 is characterized in that, the groove crack of described I font groove is 5 ± 2mm.
3. the welding method of ocean platform module wall board gas shielded flux-cored down weld according to claim 1 is characterized in that, described welding material is the safe flux-cored wire in sky, Kunshan, and the model of this welding wire is E71T-1TWE-711, and gage of wire is 1.2mm.
4. the welding method of ocean platform module wall board gas shielded flux-cored down weld according to claim 1; it is characterized in that; the welding parameter of setting in the preparatory process before the described weldering is that welding arc voltage is 19 to 22V; welding current is 160 to 210A, and speed of welding is 100 to 400mm/min.
5. the welding method of ocean platform module wall board gas shielded flux-cored down weld according to claim 1; it is characterized in that described welding method adopts tow sides single-run welding mode, control full swing width is 10 ± 3mm; the welding position is full position, and welding direction is for downwards upright.
CN200910079311A 2009-03-06 2009-03-06 Welding method of ocean platform module wall board gas shielded flux-cored down weld Pending CN101823186A (en)

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Application Number Priority Date Filing Date Title
CN200910079311A CN101823186A (en) 2009-03-06 2009-03-06 Welding method of ocean platform module wall board gas shielded flux-cored down weld

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102114577A (en) * 2010-12-17 2011-07-06 陕西国德电气制造有限公司 One-time welding method
CN102513661A (en) * 2011-12-19 2012-06-27 上海振华重工集团(南通)有限公司 CO2 (carbon dioxide) gas shielded welding method for flux-cored wires of marine engineering lifting pile leg
CN110653462A (en) * 2019-09-18 2020-01-07 江苏新扬子造船有限公司 Fitting-out piece vertical angle welding method
CN111604624A (en) * 2020-05-29 2020-09-01 广船国际有限公司 Test device for obtaining weld heat cracks and evaluation method
CN113145979A (en) * 2021-04-29 2021-07-23 广船国际有限公司 Welding method of ship window frame

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102114577A (en) * 2010-12-17 2011-07-06 陕西国德电气制造有限公司 One-time welding method
CN102114577B (en) * 2010-12-17 2016-02-10 陕西国德电气制造有限公司 A kind of disposable welding method
CN102513661A (en) * 2011-12-19 2012-06-27 上海振华重工集团(南通)有限公司 CO2 (carbon dioxide) gas shielded welding method for flux-cored wires of marine engineering lifting pile leg
CN102513661B (en) * 2011-12-19 2014-02-12 上海振华重工集团(南通)有限公司 CO2 (carbon dioxide) gas shielded welding method for flux-cored wires of marine engineering lifting pile leg
CN110653462A (en) * 2019-09-18 2020-01-07 江苏新扬子造船有限公司 Fitting-out piece vertical angle welding method
CN111604624A (en) * 2020-05-29 2020-09-01 广船国际有限公司 Test device for obtaining weld heat cracks and evaluation method
CN113145979A (en) * 2021-04-29 2021-07-23 广船国际有限公司 Welding method of ship window frame

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Open date: 20100908