CN104526136A - Method for welding large-gap groove through submerged automatic arc welding - Google Patents
Method for welding large-gap groove through submerged automatic arc welding Download PDFInfo
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- CN104526136A CN104526136A CN201410693791.0A CN201410693791A CN104526136A CN 104526136 A CN104526136 A CN 104526136A CN 201410693791 A CN201410693791 A CN 201410693791A CN 104526136 A CN104526136 A CN 104526136A
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- 238000003466 welding Methods 0.000 title claims abstract description 160
- 238000000034 method Methods 0.000 title claims abstract description 75
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 230000008569 process Effects 0.000 claims abstract description 19
- 238000010276 construction Methods 0.000 claims abstract description 9
- 238000002360 preparation method Methods 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims description 40
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 23
- 239000002184 metal Substances 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 230000007547 defect Effects 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 230000001427 coherent effect Effects 0.000 claims description 8
- 238000009659 non-destructive testing Methods 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 claims description 7
- 238000009863 impact test Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 230000001066 destructive effect Effects 0.000 claims description 6
- 238000005304 joining Methods 0.000 claims description 6
- 210000001503 joint Anatomy 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000004927 fusion Effects 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 208000034189 Sclerosis Diseases 0.000 claims description 3
- 230000008021 deposition Effects 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 238000010891 electric arc Methods 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 claims description 3
- 238000003892 spreading Methods 0.000 claims description 3
- 230000007480 spreading Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000002411 adverse Effects 0.000 abstract description 3
- 238000005452 bending Methods 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 3
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
Classifications
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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
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- Arc Welding In General (AREA)
Abstract
The invention relates to a method for welding a large-gap groove through submerged automatic arc welding. The large-gap groove is a groove with a gap greater than 3 mm but smaller than or equal to 8 mm. The method comprises the following steps of 1 defining a using range process production according to a welding process principle and determining a used welding product; 2 completing preparation work according to technical index of process construction before process welding; 3 selecting reasonable welding process parameters and completing single-side welding double-side forming welding of the large-gap submerged automatic arc welding; 4 conducting relevant detection on welding joints and judging whether the welding joints are qualified or not. By means of the novel welding method, the adverse influence produced by a too large welding groove is reduced, the shortcomings brought by a traditional process to welding structure building are eliminated, product quality is improved, a workpiece manufacturing period is shortened, and further welding structure construction periods in all industries are shortened.
Description
Technical field
The present invention relates to Welding Structure to build, be related specifically to a kind of new technology of submerged-arc welding, specifically a kind of method using Lincoln weld to weld wide arc gap groove.
Background technology
At present in Welding Structure is built, the welding of submerged-arc welding that relatively more conventional is, it is the general all given fit-up gap when assembling, mainly in order to ensure root penetration and improve bead contour.When determining fit-up gap, consider that groove type and size and the back side have the situations such as linerless.If the bevelled angle of institute is less, then fit-up gap must be strengthened.But excessive gap is easily burnt, also need more weld seam to fill metal, increase the distortion of welding cost and weldment.Usual fit-up gap should not be greater than gage of wire.But when large scale structure assembles, because precision controlling is extremely difficult, be difficult to the small―gap suture groove being met submerged arc welding technique requirement.
Also there is the restriction because being subject to various condition in prior art, workpiece can not be carried out the situation overturning construction, mostly adopt CO at present in Welding Structure is built
2gas shielded arc welding ceramic liner single face welding and double face shaping has come, this method due to by welder's technical ability, the impact of the many factors such as welding material and performance, also exist labour intensity large, expend the disadvantages such as many, reliability difference in man-hour.
Summary of the invention
The object of the invention is to the deficiency overcoming above-mentioned existing technique existence, a kind of method using Lincoln weld to weld wide arc gap groove is provided.Utilize the inventive method to reduce the adverse effect because bevel for welding excesssive gap produces, complete welding in the mode of one side welding with back formation, thus improve Welding Structure production efficiency, reduce labour intensity and Improving The Quality of Products.
In order to reach upper goal of the invention, the technical scheme that patent of the present invention provides is as follows:
Use Lincoln weld to weld a method for wide arc gap groove, described wide arc gap groove refers to 3mm < Gap≤8mm groove, and it is characterized in that, the method comprises the steps:
The first step, specifies the scope of application of explained hereafter, determines selecting of wlding, and the described scope of application includes machinery, automobile, boats and ships, building, ocean engineering, relates to all wide arc gap groove jigsaw abutment joints wherein;
Second step, according to construction technology technical indicator, completes technique and welds front preparation, and described constructing skill index includes groove and assembles, draws arc-extinguishing plate installation, the subsides of liner dress and iron powder laying;
3rd step, selects rational welding condition, completes the one side welding with back formation welding of wide arc gap Lincoln weld;
4th step, butt welded seam carries out coherent detection, judge that whether it is qualified, described coherent detection includes Non-Destructive Testing and destructive detection, described Non-Destructive Testing comprises Magnetic testing and ray detection, and described destructiveness detects and comprises: tension test, bend test, impact test, hardness test and macrostructure are detected.
Lincoln weld is used to weld in the method for wide arc gap groove in the present invention, in the described first step, welding procedure principle refers to: adopt flexible gasket material to be pasted onto back of weld, dose certain metal powder in weld groove, utilize the principle of Lincoln weld to complete welding.
Use Lincoln weld to weld in the method for wide arc gap groove in the present invention, in described second step, constructing skill index specifically refers to:
2a. groove assembles: groove type is V-type, bevel angle 45 ~ 60 °, do not stay root face and control errors at 0 ~ 2mm, groove gap controls at 3mm < Gap≤8mm, and should be noted plate face levelness during groove equipment, back of weld assembling unfitness of butt joint must be less than 1.5mm;
2b. draws arc-extinguishing plate and installs: when technique is welded, the head and the tail two ends of its weld seam are easy to produce longitudinal crack, need install additional draw arc-extinguishing plate for preventing the generation of longitudinal crack when welding at weld seam head and the tail two ends;
2c. liner dress pastes: the back side close adhesion need paying special attention to liner and steel plate, the joining place of liner and liner should advance gapless mutually, prevents from welding process, cause the weld seam of the joining place of liner and liner occur burn-through or leak slag phenomenon;
2d. iron powder is laid: the iron powder that technique uses is straight iron powder, to make up the inhomogeneities of groove, makes it under same welding conditions, obtain uniform back side welding forming; Can prevent electric arc from burning in the place close to liner, ensure arc stability, increase deposition rate; Before spreading iron powder, each intersegmental gap be measured, and be identified at surface of steel plate, then according to the difference in gap, laying depth be adjusted.
Use Lincoln weld to weld in the method for wide arc gap groove in the present invention, during the weld seam of the 4th described step under the 3mm < Gap≤8mm of bevel for welding gap, the relational expression of welding current and arc voltage is:
U=0.02I+20
U-arc voltage (V) in formula
I-welding current (A)
The Main Basis selecting welding current is groove gap, iron powder laying depth and bevel angle;
The Main Basis of arc voltage is selected to be welding current and molten wide requirement;
When selecting welding condition before weldering, first choose welding current and weldingvoltage, then select speed of welding.
Use Lincoln weld to weld in the 5th step of the method for wide arc gap groove in the present invention, described ray detection is for detecting weld seam internal flaw, and Magnetic testing is for detecting weld seam External Defect, described tension test is for evaluating intensity and the plastic property of weld seam or welding point, described bend test also can reflect the plasticity difference of welding point regional for evaluating welding point plasticity, expose weld defect, the bond quality of examination fusion area, described impact test is for evaluating toughness and the notch sensitivity of weld metal and welding point, described hardness test is for evaluating the sclerosis tendency of welding point, and indirectly can examine the brittle degree of welding point, described macrostructure is detected can in a very large FOV, to discontinuity of material, the distribution of macrostructure's defect and classification etc. carry out detecting and evaluating.
Relative to the CO that prior art welding wide arc gap groove weld adopts
2gas shielded arc welding ceramic liner single face welding and double face shaping technique, the present invention is a kind of technique using Lincoln weld welding wide arc gap groove to reach one side welding with back formation, and its tool has the following advantages:
1. the present invention is suitable for welding long weld seam according to Lincoln weld, production efficiency is high, weldquality good, process characteristic easy and simple to handle, compensate for prior art labour intensity in welding process large, expend the disadvantages such as many, reliability difference in man-hour.
2. the inventive method has the feature of one side welding with back formation equally, so when there is the large welded structures of wide arc gap groove weld in welding, without the need to standing up welding to Welding Structure again, both work difficulty was reduced, can the working time be saved again, the danger occurred when standing up can also be reduced simultaneously.
3, adopt the inventive method, carry out welding operation according to welded wide arc gap feature, greatly can reduce the assembly difficulty of relevant large welded structures.
Accompanying drawing explanation
Fig. 1 is a kind of schematic diagram using Lincoln weld to weld the method for wide arc gap groove of the present invention.
Fig. 2 is a kind of groove type figure using Lincoln weld to weld the method for wide arc gap groove of the present invention.
Fig. 3 is a kind of welding procedure qualification test groove type figure using Lincoln weld to weld the method for wide arc gap groove of the present invention.
Detailed description of the invention
We use the method for Lincoln weld welding wide arc gap groove to be described in further detail with specific embodiment to patent of the present invention by reference to the accompanying drawings below; understand its technological process and mode of operation in the hope of more cheer and bright, but the protection domain of patent application of the present invention can not be limited with this.
Just based on problems of the prior art, patent of the present invention has carried out the research of wide arc gap Lincoln weld, the new method of trial submerged-arc welding reduces the adverse effect because bevel for welding excesssive gap produces, the butt welding of elimination traditional handicraft connects the deficiency that structure building brings, Improving The Quality of Products, reduction workpiece fabrication cycle, and then shorten every profession and trade Welding Structure construction period.
First new method of the present invention is determined according to technique Fundamentals of Welding can welding region, according to Fig. 1, Fig. 2, content completes the front preparation of welding simultaneously, then the welding by selecting rational welding condition to carry out single face welding and double face shaping, finally logical coherent detection, judge that whether weld seam is qualified, and then judge the Welding Structure product quality of manufacture, thus realize the one side welding with back formation of wide arc gap Lincoln weld.
The method that the present invention uses Lincoln weld to weld wide arc gap groove specifically includes following steps:
The first step, by technique Fundamentals of Welding, specifies the explained hereafter scope of application, determines that welding material is selected.These technique Fundamentals of Welding are: adopt flexible gasket material to be pasted onto back of weld, dose certain metal powder, utilize the principle of Lincoln weld to complete welding in weld groove.Can think thus, in current Welding Structure is built, the region of welding is carried out in all use submerged-arc welding, as long as at the gasket material of back of weld sticking flexible, can dose metal powder in weld groove, just can use this technique.So specifying this technique can in industries such as machinery, automobile, boats and ships, building, ocean engineerings, the enterprising enforcement of all wide arc gap groove jigsaw abutment joints related to is used.
Second step, according to construction technology technical indicator, completes the front preparation of technique welding.Construction technology technical indicator is specific as follows:
1. groove assembling: groove type is V-type, bevel angle 45 ~ 60 °, do not stay root face and control errors at 0 ~ 2mm, groove gap controls at 3mm < Gap≤8mm, and should be noted plate face levelness during groove equipment, back of weld assembling unfitness of butt joint must be less than 1.5mm.
2. draw arc-extinguishing plate to install: the two ends of its weld seam are easy to produce longitudinal crack when technique is welded, need install additional at weld seam head and the tail two ends when welding for preventing the generation of crackle and draw arc-extinguishing plate.
3. liner dress pastes: the back side close adhesion need paying special attention to liner and steel plate, the joining place of liner and liner should advance gapless mutually, prevents from welding process, causing the weld seam of the joining place of liner and liner to occur burn-through or leaking the phenomenon of slag.
4. iron powder is laid: the iron powder that technique uses is straight iron powder substantially.Straight iron powder can make up the inhomogeneities of groove to obtain uniform back side welding forming under same welding conditions; Can prevent electric arc from burning in the place close to liner, ensure arc stability; Can deposition rate be increased, improve welding efficiency.Before spreading iron powder, each intersegmental gap be measured.And be identified at surface of steel plate, then according to the difference in gap, laying depth is adjusted.
3rd step, selects rational welding condition, completes the one side welding with back formation welding of wide arc gap Lincoln weld.Welding condition comprises: welding current, arc voltage, speed of welding and iron powder lay height.In welding process, also will adjusting process parameter at any time with groove gap change.Technological parameter is specifically selected to see the following form:
For obtaining good appearance of weld, while increase of weld current, suitably should improve arc voltage, namely voltage and current should mate.
Drawn by a large amount of technical study test data analyzers carried out this technique, during weld seam under the 3mm < Gap≤8mm of bevel for welding gap, the relational expression of welding current and arc voltage:
U=0.02I+20
U-arc voltage (V) in formula
I-welding current (A)
The Main Basis selecting welding current is groove gap, iron powder laying depth and bevel angle.
The Main Basis of arc voltage is selected to be welding current and molten wide requirement.
When selecting welding condition before weldering, usually first choose welding current and weldingvoltage, and then select speed of welding.
4th step, butt welded seam carries out coherent detection, judges that whether it is qualified.Wherein coherent detection comprises Non-Destructive Testing and destructive detection, and Non-Destructive Testing comprises: Magnetic testing and ray detection, and destructive detection comprises: tension test, bend test, impact test, hardness test, macrostructure are detected.
Ray detection: for detecting weld seam internal flaw.
Magnetic testing: for detecting weld seam External Defect.
Tension test: for evaluating intensity and the plastic property of weld seam or welding point.
Bend test: the plasticity difference that also can reflect welding point regional for evaluating welding point plasticity, exposes weld defect, the bond quality of examination fusion area.
Impact test: for evaluating toughness and the notch sensitivity of weld metal and welding point.
Hardness test: for evaluating the sclerosis tendency of welding point, and indirectly can examine the brittle degree of welding point.
Macrostructure is detected: can in a very large FOV, detects the distribution of discontinuity of material, macrostructure's defect and classification etc. and evaluates.
Embodiment 1
In the present embodiment, use the detailed step of the method for Lincoln weld welding wide arc gap groove that the welding procedure qualification test process of CX-G14-WPS-050 can be utilized to carry out essence checking, be used as elaborating further technical process of the present invention:
The first step, by technique Fundamentals of Welding, determines that welding material is selected.
The mother metal that test plan uses is: EH36 t=19mm, therefore need pay attention to when Selective filling metal.
Second step, according to Fig. 3, groove type assembles, and according to the form of Fig. 1, in Fig. 1, label 1 is welding wire, and label 2 is iron powder filler, and label 3 is liner, and label 4 is solder flux, completes welds prepares work.Wherein iron powder laying depth selects 15mm.
3rd step, according to groove gap Gap=6 ~ 8mm, iron powder laying depth 15mm, bevel angle 45 ~ 50 °, determines that test welding current is I=850-860A.Then according to U=0.02I+20 formula, draw test arc voltage U=36-37V, and be v=300 ~ 320mm/min by welding current and arc voltage determination speed of welding.Last according to above-mentioned welding parameter, complete the welding of the one side welding with back formation of wide arc gap Lincoln weld.
4th step, butt welded seam carries out coherent detection, and comprising Non-Destructive Testing and destructive detection, concrete detection data are as follows:
1. Non-Destructive Testing:
Ray detection: according to JISZ3104-95 evaluation criteria, assessment of conformity.
Magnetic testing: check and accept by standard JISG0565-92, do not find excessive defect vestige, it is qualified to be assessed as.
2. destructive detection:
The parameter of tension test refers to following table:
| Specimen coding | Standard pull tension intensity TS [N/mm 2] | Test tensile strength TS min [N/mm 2] | Port position |
| CX-G14-WPS-050 | 490-620 | 518 | Disconnected mother metal |
| CX-G14-WPS-050 | 490-6620 | 534 | Disconnected weld seam |
The supplemental characteristic of bend test refers to following table:
| Pressure head diameter [mm] | 5t | Angle of bend [°] | 180 |
| Type | Result | Type | Result |
| Lateral bending | Qualified | Lateral bending | Qualified |
| Lateral bending | Qualified | Lateral bending | Qualified |
The test data of impact test refers to following table:
The test parameters of hardness test refers to following table:
| Type: HV | Load: 10kg |
| Mother metal: | 171～227 |
| Heat affected area: | 173～198 |
| Weld seam: | 190～222 |
Macrostructure is detected: through macro-etch test, all do not find the weld defects such as crackle, incomplete fusion, pore, slag inclusion in weld seam, melt run, heat affected area.
According to the data result of above-mentioned test item, according to associated acceptance solid standard, CX-G14-WPS-050 testing new process is qualified.
Adopt process of the present invention can well solve the unfavorable factor brought because groove gap is excessive in Welding Structure construction, and utilize that technology of automatic submerged arc is suitable for welding long weld seam, production efficiency is high, weldquality good, process characteristic easy and simple to handle, the welding production efficiency of Welding Structure 3 ~ 4 times can be improved, significantly promote Welding Structure welding quality simultaneously, and then make the corresponding Welding Structure production cycle shorten 60 ~ 70%.
Claims (5)
1. use Lincoln weld to weld a method for wide arc gap groove, described wide arc gap groove refers to 3mm < Gap≤8mm groove, and it is characterized in that, the method comprises the steps:
The first step, adopt welding procedure principle, specify the scope of application of explained hereafter, determine selecting of wlding, the described scope of application includes machinery, automobile, boats and ships, building and ocean engineering industry, relates to all wide arc gap groove jigsaw abutment joints in industry;
Second step, according to construction technology technical indicator, completes technique and welds front preparation, and described constructing skill index includes groove and assembles, draws arc-extinguishing plate installation, the subsides of liner dress and iron powder laying;
3rd step, selects rational welding condition, and complete the one side welding with back formation welding of wide arc gap Lincoln weld, described welding condition includes welding current, arc voltage, speed of welding and iron powder and lays height;
4th step, butt welded seam carries out coherent detection, judge that whether it is qualified, described coherent detection includes Non-Destructive Testing and destructive detection, described Non-Destructive Testing comprises Magnetic testing and ray detection, and described destructiveness detects and comprises: tension test, bend test, impact test, hardness test and macrostructure are detected.
2. a kind of method using Lincoln weld to weld wide arc gap groove according to claim 1, it is characterized in that, in the described first step, welding procedure principle refers to: adopt flexible gasket material to be pasted onto back of weld, dose certain metal powder in weld groove, utilize the principle of Lincoln weld to complete welding.
3. a kind of method using Lincoln weld to weld wide arc gap groove according to claim 1, it is characterized in that, in described second step, constructing skill index specifically refers to:
2a. groove assembles: groove type is V-type, bevel angle 45 ~ 60 °, do not stay root face and control errors at 0 ~ 2mm, groove gap controls at 3mm < Gap≤8mm, and should be noted plate face levelness during groove equipment, back of weld assembling unfitness of butt joint must be less than 1.5mm;
2b. draws arc-extinguishing plate and installs: when technique is welded, the head and the tail two ends of its weld seam are easy to produce longitudinal crack, need install additional draw arc-extinguishing plate for preventing the generation of longitudinal crack when welding at weld seam head and the tail two ends;
2c. liner dress pastes: the back side close adhesion need paying special attention to liner and steel plate, the joining place of liner and liner should advance gapless mutually, prevents from welding process, cause the weld seam of the joining place of liner and liner occur burn-through or leak slag phenomenon;
2d. iron powder is laid: the iron powder that technique uses is straight iron powder, to make up the inhomogeneities of groove, makes it under same welding conditions, obtain uniform back side welding forming; Can prevent electric arc from burning in the place close to liner, ensure arc stability, increase deposition rate; Before spreading iron powder, each intersegmental gap be measured, and be identified at surface of steel plate, then according to the difference in gap, laying depth be adjusted.
4. a kind of method using Lincoln weld to weld wide arc gap groove according to claim 1, it is characterized in that, in the 4th described step, during weld seam under the 3mm < Gap≤8mm of bevel for welding gap, the relational expression of welding current and arc voltage is:
U=0.02I+20
U-arc voltage (V) in formula
I-welding current (A)
The Main Basis selecting welding current is groove gap, iron powder laying depth and bevel angle;
The Main Basis of arc voltage is selected to be welding current and molten wide requirement;
When selecting welding condition before weldering, first choose welding current and weldingvoltage, then select speed of welding.
5. a kind of method using Lincoln weld to weld wide arc gap groove according to claim 1, it is characterized in that, in the 5th described step, described ray detection is for detecting weld seam internal flaw, and Magnetic testing is for detecting weld seam External Defect, described tension test is for evaluating intensity and the plastic property of weld seam or welding point, described bend test also can reflect the plasticity difference of welding point regional for evaluating welding point plasticity, expose weld defect, the bond quality of examination fusion area, described impact test is for evaluating toughness and the notch sensitivity of weld metal and welding point, described hardness test is for evaluating the sclerosis tendency of welding point, and indirectly can examine the brittle degree of welding point, described macrostructure is detected can in a very large FOV, to discontinuity of material, the distribution of macrostructure's defect and classification etc. carry out detecting and evaluating.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106826087A (en) * | 2016-12-27 | 2017-06-13 | 上海江南长兴造船有限责任公司 | A kind of Large Container Ship crack arrest steel construction method |
| CN109208409A (en) * | 2017-06-30 | 2019-01-15 | 比亚迪股份有限公司 | Riding-type Monorail Switch beam and preparation method thereof |
| CN109676220A (en) * | 2019-01-31 | 2019-04-26 | 湘潭电机股份有限公司 | A kind of slab butt welding method |
| CN110560849A (en) * | 2019-09-05 | 2019-12-13 | 广州黄船海洋工程有限公司 | soft gasket single-side submerged arc welding process for EH36 high-strength steel thick plate |
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| CN114799406A (en) * | 2022-05-07 | 2022-07-29 | 广船国际有限公司 | Welding method of plate for ship |
| CN115922030A (en) * | 2022-12-30 | 2023-04-07 | 金川集团股份有限公司 | Arc striking device and using method thereof |
| CN116079199A (en) * | 2022-12-28 | 2023-05-09 | 四川川锅锅炉有限责任公司 | A method to solve double-sided forming of submerged arc welding |
| CN115372583B (en) * | 2022-07-25 | 2024-03-26 | 中铁武汉大桥工程咨询监理有限公司 | Quality control method for bridge deck U-rib welding seam |
| CN120438773A (en) * | 2025-07-09 | 2025-08-08 | 中船黄埔文冲船舶有限公司 | A single-sided submerged arc automatic welding method |
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| CN116079199B (en) * | 2022-12-28 | 2025-09-02 | 四川川锅锅炉有限责任公司 | A method for solving the double-sided forming problem of submerged arc welding single-sided welding |
| CN115922030A (en) * | 2022-12-30 | 2023-04-07 | 金川集团股份有限公司 | Arc striking device and using method thereof |
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