CN102554416A - Submerged-arc welding root welding and back chipping process of thick plate with K-type groove - Google Patents

Submerged-arc welding root welding and back chipping process of thick plate with K-type groove Download PDF

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Publication number
CN102554416A
CN102554416A CN2011104353352A CN201110435335A CN102554416A CN 102554416 A CN102554416 A CN 102554416A CN 2011104353352 A CN2011104353352 A CN 2011104353352A CN 201110435335 A CN201110435335 A CN 201110435335A CN 102554416 A CN102554416 A CN 102554416A
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CN
China
Prior art keywords
welding
groove
root
chipping
reverse
Prior art date
Application number
CN2011104353352A
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Chinese (zh)
Inventor
龙兴平
张成杰
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中国船舶重工集团公司第七二五研究所
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Priority to CN2011104353352A priority Critical patent/CN102554416A/en
Publication of CN102554416A publication Critical patent/CN102554416A/en

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Abstract

The invention discloses a submerged-arc welding root welding and back chipping process of a thick plate with a K-type groove. The K-type groove is an asymmetric K-type groove, an upper open angle and a lower open angle of the groove are both 45 degrees to 50 degrees, and truncated edges are not reserved at the root. During assembly, groove clearance of 2mm to 3mm is reserved. During welding, solid gas protection welding wires under pulse current are adopted for backing welding of a root pass of the front side of a K-type groove test piece, and after the root pass is thoroughly fused, a part of weld metal penetrates through the reverse side of the groove to achieve backing welding. After welding, back chipping of the reverse side is performed. Finally, gas shielded welding under large current is adopted for fusion welding of the roof of the reverse side groove, and gas rich in argon is used as protective gas. The submerged-arc welding root welding and back chipping process reduces time for slag removal of root pass of submerged-arc welding and polishing and finishing of the reverse side groove of the welding test piece, improves welding efficiency by more than 30%, removes a carbon arc gouging process, decreases welding noises and dust emission, lowers labor intensity of welders and reduces time for damaging workers under high-decibel noises.

Description

A kind of submerged-arc welding root weld and back chipping technology of K type groove slab
Technical field
The present invention relates to a kind of welding technique, particularly a kind of submerged-arc welding root weld and back chipping technology of K type groove slab.
Background technology
In the slab submerged-arc welding welding of adopting K type groove,, cause the groove root pass to take off the slag difficulty, and groove back root cleaning difficulty is bigger because it is relatively large to receive the restriction and the submerged-arc welding weld heat input of groove.The method that back root cleaning adopts when factory and laboratory's welding slab is generally carbon arc air gouging.Thorough in order to ensure back chipping; The carbon arc air gouging worker is easy to go out root notches one at straight flange one side planing; Make straight flange one side be the indent arcuation at root; And the reverse side groove glacing flatness behind the gouge is relatively poor, has so not only increased the difficulty of polishing but also has been easy to cause later welded to produce weld defects such as incomplete fusion and slag inclusion.
Chinese patent number has been described for the patent of CN200610117500.9 and a kind of pipe has been carried out the mist not welding method of back chipping that feels secure, but its objective for implementation is the pipe single face butt welding of double V-groove, can not be suitable for for the K type groove of the two-sided welding of need.Chinese patent number has been described a kind of not back chipping welding technique of submerged arc welding of cut deal X type groove for the patent of CN201010579763.8; But root face is too little when directly carrying out the submerged-arc welding welding of bigger hot input quantity burn-through very easily more can not be suitable for for K type groove.
Summary of the invention
Technical problem to be solved by this invention provides a kind of submerged-arc welding root weld and back chipping technology of K type groove slab; Solve big, the tedious problem of carbon arc air gouging operation labour intensity that existing submerged-arc welding welding back chipping adopts; Remove labour intensity and tedious carbon arc air gouging back chipping operation; Simplify back chipping and the scarfing cinder difficulty of slab submerged-arc welding welding, with the submerged-arc welding welding efficiency that improves K type groove slab with alleviate working strength of workers.
For the purpose that realizes solving the problems of the technologies described above, the present invention has adopted following technical scheme:
The submerged-arc welding root weld and the back chipping technology of a kind of K type groove slab of the present invention comprise:
(1), slope type setting: slope type is asymmetric K type groove, and what groove was darker is positive, and more shallow is reverse side, and front groove and reverse side bevel angle are 45 ° ~ 50 °, and root does not stay root face, and the groove fit-up gap is 2~3mm;
(2), bottoming welding: during welding, adopt pulse current solid welding wire down to carry out the bottoming welding of K type groove test plate (panel) front root pass, make the root pass penetration after, the part weld metal sees through the groove reverse side, accomplishes bottoming and welds; Adopt the mixed gas protected of argon gas and carbon dioxide during welding;
(3), back chipping: after the welding, again with abrasive machine to the finishing of polishing of groove reverse side root, thereby reach the purpose of back chipping;
(4), fusion welding: adopt the gas shielded arc welding under the big electric current to carry out the fusion welding of groove reverse side root at last, protective gas adopts the mist of argon gas and carbon dioxide.
This patent is alleged does not stay root face, and promptly the groove frontal slope of hypotenuse side and reverse side inclined-plane directly intersect.
The mist of described argon gas and carbon dioxide, the mist of preferred argon gas and carbon dioxide is the mist of volume ratio 80% argon gas+20% carbon dioxide.
Through adopting technique scheme, the present invention has following beneficial effect:
1, having reduced scarfing cinder of submerged-arc welding root pass and test piece for welding reverse side groove polishes a large amount of welding non-cutting times such as finishing.Be of a size of in a pair to adopt on the steel plate of 1000mm (length) * 500mm (wide) * 60mm (thick) and carry out the submerged-arc welding welding after root weld of the present invention and the back chipping technology again and adopt traditional submerged-arc welding to weld to compare; Can practice thrift about 200 minutes weld intervals, improve welding efficiency more than 30%;
2, removed the carbon arc air gouging operation, reduced the discharging of welding noise and dust, alleviated welder's labour intensity and significantly reduced welder and the polishing harm time of workman under the high-decibel noise.
Description of drawings
Fig. 1 is traditional submerged-arc welding K type slope type.
Fig. 2 is a welding procedure K type slope type of the present invention.
Among the figure, vertically highly for the inclined-plane of 35mm is the groove front, back to the inclined-plane be the groove reverse side.
The specific embodiment
Select for use two pairs to be of a size of the steel plate of 1000mm (length) * 500mm (wide) * 60mm (thick).The traditional submerged welding process of one secondary employing welds; Carry out the submerged-arc welding welding again after another secondary employing technology of the present invention.Welding current, weldingvoltage and welding material etc. are all consistent.Adopt the test plate (panel) of traditional submerged welding process to select slope type among Fig. 1 for use, carry out front groove welding earlier, carbon arc air gouging back chipping after positive welding is accomplished carries out the welding of reverse side groove again after polishing is clean.Adopt the test plate (panel) of technology of the present invention to select slope type among Fig. 2 for use, carry out the submerged-arc welding welding of positive and negative groove behind root weld, the back chipping again.Adopt the mixed gas protected of argon gas and carbon dioxide during welding, mist is for forming volume ratio 80% argon gas+20% carbon dioxide; The submerged-arc welding welding parameter is seen table 1, and the time of each operation and use of testing is seen table 2, and table 3 is seen in the noise adverse factor test and appraisal of grinder buffing and carbon arc air gouging operation.
Table 1 submerged-arc welding welding parameter
Effect comparison under two kinds of welding procedures of table 2
Table 3 noise adverse factor test and appraisal table
Two secondary test plate (panel)s are after ultrasonic examination, and equal 100% is qualified, guaranteed welding quality.From table 2; We can be clear that; Adopt and carry out the submerged-arc welding welding behind technology root weld of the present invention, the back chipping again, compare, reduced the groove polishing finishing time behind carbon arc air gouging and the gouge with traditional submerged welding process; And shortened weld interval greatly, promoted welding efficiency to a great extent.We can find out from table 3; The noise nuisance of carbon arc air gouging and grinder buffing is bigger; After adopting technology of the present invention; The workman is received to shorten into 35 minutes in 130 minutes of noise and metallic dust pollution, improved workman's working environment to a certain extent, and reduced working strength of workers dramatically.Therefore, compare, adopt root weld of the present invention and back chipping technology to carry out K type groove slab submerged-arc welding welding again, reached the effect that reduces labor strength, improves welding efficiency with traditional submerged-arc welding.

Claims (2)

1. the submerged-arc welding root weld and the back chipping technology of a K type groove slab is characterized in that: comprising:
(1), slope type setting: slope type is asymmetric K type groove, and what groove was darker is positive, and more shallow is reverse side, and front groove and reverse side bevel angle are 45 ° ~ 50 °, and root does not stay root face, and the groove fit-up gap is 2~3mm;
(2), bottoming welding: during welding, adopt pulse current solid gas protecting welding wire down to carry out the bottoming welding of K type groove test plate (panel) front root pass, make the root pass penetration after, the part weld metal sees through the groove reverse side, accomplishes bottoming and welds; Adopt the mixed gas protected of argon gas and carbon dioxide during welding;
(3), back chipping: after the welding, again with abrasive machine to the finishing of polishing of groove reverse side root, thereby reach the purpose of back chipping;
(4), fusion welding: adopt the gas shielded arc welding under the big electric current to carry out the fusion welding of groove reverse side root at last, protective gas adopts the mist of argon gas and carbon dioxide.
2. according to the submerged-arc welding root weld and the back chipping technology of the said K type of claim 1 groove slab, it is characterized in that: the mist of described argon gas and carbon dioxide is the mist of volume ratio 80% argon gas+20% carbon dioxide.
CN2011104353352A 2011-12-22 2011-12-22 Submerged-arc welding root welding and back chipping process of thick plate with K-type groove CN102554416A (en)

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Application Number Priority Date Filing Date Title
CN2011104353352A CN102554416A (en) 2011-12-22 2011-12-22 Submerged-arc welding root welding and back chipping process of thick plate with K-type groove

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102814576A (en) * 2012-09-05 2012-12-12 中国化学工程第十四建设有限公司 Argon-rich carbon dioxide arc welding method
CN102873439A (en) * 2012-10-16 2013-01-16 南京钢铁股份有限公司 Submerged arc welding process for E36 oceaneering steel with thickness being 80mm
CN102922103A (en) * 2012-10-16 2013-02-13 南京钢铁股份有限公司 Submerged arc welding method for K-shaped groove of 80mm extra-thick steel plate with excellent plate shape after welding
CN102962559A (en) * 2012-12-11 2013-03-13 南京钢铁股份有限公司 Flux-cored arc welding method for K-shaped groove of 80-mm super-thick steel plate
CN103949754A (en) * 2014-03-31 2014-07-30 长治清华机械厂 Welding technique for medium plate large-size box-shaped beam
CN104002023A (en) * 2014-05-29 2014-08-27 南通中远重工有限公司 Welding process special for thick dissimilar material plate
CN104526135A (en) * 2014-11-20 2015-04-22 上海沪临重工有限公司 Non-back gouging submerged-arc welding method of H-shaped steel
CN104923893A (en) * 2015-06-25 2015-09-23 江苏省沙钢钢铁研究院有限公司 K-shaped groove submerged-arc welding technology for good shape of welded plate
CN105081531A (en) * 2015-09-22 2015-11-25 武汉钢铁(集团)公司 Gas-protected butt welding method for high-strength bridge steel K-shaped connectors
CN105127558A (en) * 2015-09-22 2015-12-09 武汉钢铁(集团)公司 Method for hybrid welding of high-strength bridge steel K type joint
CN105149807A (en) * 2015-10-22 2015-12-16 中国二十二冶集团有限公司 Manufacturing method of high-strength thick plate steel structure
CN105414784A (en) * 2015-12-09 2016-03-23 福建省马尾造船股份有限公司 Round steel butt welding technique
CN107052516A (en) * 2017-01-13 2017-08-18 南通远洋船舶配套有限公司 Ship slab welding process
CN109202214A (en) * 2017-06-30 2019-01-15 比亚迪股份有限公司 Riding-type Monorail Switch beam and its welding method and web
CN111037040A (en) * 2019-12-31 2020-04-21 震安科技股份有限公司 Welding process for improving fatigue performance of metal yielding damper
CN111037224A (en) * 2019-12-18 2020-04-21 安徽百甲科技有限责任公司 Welding method for carbon-free gouging back chipping of thick plate fusion penetration welded H-shaped steel

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CN101081460A (en) * 2007-03-26 2007-12-05 南阳二机石油装备(集团)有限公司 Large-sized T shaped joint full penetration assembled welding process
CN101879645A (en) * 2010-07-06 2010-11-10 蓬莱巨涛海洋工程重工有限公司 Marine engineering large thick steel plate submerged arc welding process method in low-temperature environment
CN101885099A (en) * 2010-07-16 2010-11-17 潍坊五洲风电设备有限公司 Welding process applying submerged automatic arc welding to wind power generation tower foundation seat
CN101913017A (en) * 2010-08-09 2010-12-15 河北省电力公司职业技术培训中心 Method for welding Q420 steel for power grid iron tower
CN102240841A (en) * 2011-06-30 2011-11-16 首钢总公司 Submerged-arc welding process for T-type joint for extra thick steel plate

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Publication number Priority date Publication date Assignee Title
CN101081460A (en) * 2007-03-26 2007-12-05 南阳二机石油装备(集团)有限公司 Large-sized T shaped joint full penetration assembled welding process
CN101879645A (en) * 2010-07-06 2010-11-10 蓬莱巨涛海洋工程重工有限公司 Marine engineering large thick steel plate submerged arc welding process method in low-temperature environment
CN101885099A (en) * 2010-07-16 2010-11-17 潍坊五洲风电设备有限公司 Welding process applying submerged automatic arc welding to wind power generation tower foundation seat
CN101913017A (en) * 2010-08-09 2010-12-15 河北省电力公司职业技术培训中心 Method for welding Q420 steel for power grid iron tower
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Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102814576A (en) * 2012-09-05 2012-12-12 中国化学工程第十四建设有限公司 Argon-rich carbon dioxide arc welding method
CN102814576B (en) * 2012-09-05 2014-12-03 中国化学工程第十四建设有限公司 Argon-rich carbon dioxide arc welding method
CN102873439A (en) * 2012-10-16 2013-01-16 南京钢铁股份有限公司 Submerged arc welding process for E36 oceaneering steel with thickness being 80mm
CN102922103A (en) * 2012-10-16 2013-02-13 南京钢铁股份有限公司 Submerged arc welding method for K-shaped groove of 80mm extra-thick steel plate with excellent plate shape after welding
CN102962559A (en) * 2012-12-11 2013-03-13 南京钢铁股份有限公司 Flux-cored arc welding method for K-shaped groove of 80-mm super-thick steel plate
CN103949754A (en) * 2014-03-31 2014-07-30 长治清华机械厂 Welding technique for medium plate large-size box-shaped beam
CN103949754B (en) * 2014-03-31 2016-01-20 长治清华机械厂 The large-scale box beam welding procedure of cut deal
CN104002023A (en) * 2014-05-29 2014-08-27 南通中远重工有限公司 Welding process special for thick dissimilar material plate
CN104002023B (en) * 2014-05-29 2016-08-24 南通中远重工有限公司 A kind of welding procedure for heterogeneous material slab
CN104526135A (en) * 2014-11-20 2015-04-22 上海沪临重工有限公司 Non-back gouging submerged-arc welding method of H-shaped steel
CN104923893A (en) * 2015-06-25 2015-09-23 江苏省沙钢钢铁研究院有限公司 K-shaped groove submerged-arc welding technology for good shape of welded plate
CN104923893B (en) * 2015-06-25 2017-04-19 江苏省沙钢钢铁研究院有限公司 K-shaped groove submerged-arc welding technology for good shape of welded plate
CN105127558A (en) * 2015-09-22 2015-12-09 武汉钢铁(集团)公司 Method for hybrid welding of high-strength bridge steel K type joint
CN105081531A (en) * 2015-09-22 2015-11-25 武汉钢铁(集团)公司 Gas-protected butt welding method for high-strength bridge steel K-shaped connectors
CN105127558B (en) * 2015-09-22 2017-11-07 武汉钢铁(集团)公司 A kind of high-strength bridge steel K-type joint complex welding method
CN105149807A (en) * 2015-10-22 2015-12-16 中国二十二冶集团有限公司 Manufacturing method of high-strength thick plate steel structure
CN105414784A (en) * 2015-12-09 2016-03-23 福建省马尾造船股份有限公司 Round steel butt welding technique
CN107052516A (en) * 2017-01-13 2017-08-18 南通远洋船舶配套有限公司 Ship slab welding process
CN107052516B (en) * 2017-01-13 2019-04-09 南通远洋船舶配套有限公司 Ship slab welding process
CN109202214A (en) * 2017-06-30 2019-01-15 比亚迪股份有限公司 Riding-type Monorail Switch beam and its welding method and web
CN111037224A (en) * 2019-12-18 2020-04-21 安徽百甲科技有限责任公司 Welding method for carbon-free gouging back chipping of thick plate fusion penetration welded H-shaped steel
CN111037040A (en) * 2019-12-31 2020-04-21 震安科技股份有限公司 Welding process for improving fatigue performance of metal yielding damper

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Application publication date: 20120711