CN102303177A - Construction method for butt-welding of copper-nickel composite tubes - Google Patents
Construction method for butt-welding of copper-nickel composite tubes Download PDFInfo
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- CN102303177A CN102303177A CN201110213266A CN201110213266A CN102303177A CN 102303177 A CN102303177 A CN 102303177A CN 201110213266 A CN201110213266 A CN 201110213266A CN 201110213266 A CN201110213266 A CN 201110213266A CN 102303177 A CN102303177 A CN 102303177A
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Abstract
The invention discloses welding construction methods and particularly discloses a construction method for butt-welding of copper-nickel composite tubes, belonging to the technical field of metal welding production and manufacture. The invention provides the construction method for the butt-welding of the copper-nickel composite tubes which can effectively lower the defects blowholes in welding and enhance the quality of weld seams when butt welds of the copper-nickel composite tubes are welded. The welding construction method comprises the following steps of: machining an integral double-sided K-type groove on copper-nickel composite tubes needed to be butt-jointed; butt-joint assembling; and firstly welding a lower substrate weld seam at one side of a composite layer, and then welding a transitional layer weld seam and a composite layer weld seam after carrying out back chipping on the reverse surface of the lower substrate weld seam, wherein a single-layer multi-channel welding manner is adopted when the transitional layer weld seam and the composite layer weld seam are welded.
Description
Technical field
The present invention relates to a kind of welding procedure method, especially relate to the construction method of a kind of copper nickel multiple tube butt welding, belong to metal solder manufacturing technology field.
Background technology
In certain desalinization engineering, the inventor touches copper nickel multiple tube, and specification is φ 2200 * 10+2, and material is 20R, groundwork thickness 10mm, cupronickel B 30 composite bed thickness 2mm; 4 of butt joint weld bond quantity.The groove type of tube butt welding oral area position is the groove type of equipment supply state: promptly basic unit is a V-type, and composite bed is benchmark difference indentation 3mm in interface for the peak with basic unit's double V-groove, like Fig. 3.During design welding procedure technology, the welding sequence of requirement is: weld basic unit's weld seam, tungsten argon arc welding method welding transition layer weld seam and composite bed weld seam successively by hand again with the flux-cored arc welding welding method earlier.After welding was accomplished, butt welded seam carried out 100% radiographic inspection, and the radiographic inspection egative film is reflected in transition zone weld seam and the composite bed weld seam has a large amount of pores, is judged as pore from slice, thin piece and exceeds standard, and the weld bond credit rating is the II level criterion of acceptability that the IV level does not reach regulation.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of and when the butt weld of soldering copper nickel multiple tube, can make to effectively reduce the welding gas hole defect, improve the construction method of the copper nickel multiple tube butt welding of weldquality.
The technical scheme that adopts for solving the problems of the technologies described above is: the construction method of a kind of copper nickel multiple tube butt welding, may further comprise the steps,
A, elder generation are to the basic unit of the copper nickel multiple tube of needs butt joint and the two-sided K type bevel for welding of composite bed processing integral body;
B, the copper nickel multiple tube that will process qualified bevel for welding again dock assembling;
C and then the qualified copper nickel multiple tube of butt joint assembling weld, and when assembling qualified copper nickel multiple tube and weld, are undertaken by following step, adopt the weld seam of going to a grassroots level of GTAW welding composite bed one side earlier; And then in basic unit's one side back chipping is carried out at the back side of the weld seam of going to a grassroots level and handle; Then adopt basic unit's weld seam on all of flux-cored arc welding welding basic unit one side; Then smooth by the welding of composite bed weld seam behind the first transition zone weld seam again, adopt ambrose alloy welding wire GTAW to weld the transition zone weld seam and the composite bed weld seam of composite bed one side, up to the butt weld of complete interface of welding; Simultaneously, when transition zone weld seam that welds composite bed one side and composite bed weld seam, adopt the welding method of individual layer multiple tracks to weld respectively.
Further be, to the whole two-sided K type bevel for welding of the basic unit of copper nickel multiple tube and composite bed processing the time, the peak of K type groove protrusion is positioned in the basic unit, this peak to the distance of composite bed outer surface one side less than the distance that arrives base layer exterior surface one side.
Further be when basic unit's one side is carried out the back chipping processing to the weld seam of going to a grassroots level, to adopt the angle grinding machine that the root of the weld seam of going to a grassroots level is carried out back chipping.
Further be; When transition zone weld seam and composite bed weld seam are welded; Its interlayer temperature is less than 150 ℃, and welding current is got lower limit, weldingvoltage and the speed of welding of welding material operation instructions regulation and got welding material operation instructions set upper limit value.
The invention has the beneficial effects as follows: warp is analyzed, and causes copper nickel multiple tube butt weld flaw detection not conform to the main cause of analysing to be, when adopting existing welding method to weld; In the welding of transition zone weld seam and composite bed weld seam, welding pool is all bigger, and the composite bed material is the B30 copper-nickel alloy; Belong to nonferrous materials, the 20R material of its heat conductivility and basic unit widely different, Welding Metallurgy process solid-liquid phase temperature interval is little; Liquid metal is mobile on the low side in the welding pool; Under the rapid solidification crystallization condition, welding pool is big more, is easy to generate pore more; In addition; When the transition zone weld seam welds, use be nickel-based welding wire, exist welding material and 20R and B30 etc. that the situation that interpenetrates of three kinds of metals is arranged; In the uneven thermal process of welding; The following three kinds of different metals elements of liquid phase state are irregular staggered infiltration, under the situation of the big welding pool in this interval, in weld metal, also are prone to produce pore and column crystallization body.According to above-mentioned analysis, adopt construction method of the present invention after because bevel for welding makes whole two-sided K into; Thereby dwindled the welding capacity of transition zone weld seam and composite bed weld seam greatly, simultaneously, when welding transition layer weld seam and composite bed weld seam; All adopt the welding manner of individual layer multiple tracks, welding pool is greatly diminished, liquid metal needs to diminish with the distance that can flow in the welding pool thereby make; Interpenetrative scope between three kinds of metals is also littler, and like this, the gas flow that when welding, fuses in the liquid molten pool metal just greatly reduces; And then effectively reduced the possibility that in welding process, produces gas hole defect, thereby effectively raise weldquality.
Description of drawings
Fig. 1 is the groove type sketch map of the copper nickel multiple tube butt joint groove that the present invention relates to;
Fig. 2 is the weld seam form sketch map of the copper nickel multiple tube butt welding that the present invention relates to;
Fig. 3 is the groove type sketch map of the existing butt joint groove of copper nickel multiple tube that the present invention relates to.
Be labeled as among the figure: basic unit 1, the weld seam 11 of going to a grassroots level, attend basic unit's weld seam 12, composite bed 2, composite bed weld seam 21, transition zone weld seam 3, peak 4.
The specific embodiment
As Fig. 1, shown in Figure 2 be provided by the invention a kind of when the butt weld of soldering copper nickel multiple tube, can make to effectively reduce the welding gas hole defect, improve the construction method of the copper nickel multiple tube butt welding of weldquality.Said construction method may further comprise the steps,
A, elder generation are to the basic unit 1 of the copper nickel multiple tube of needs butt joint and the two-sided K type bevel for welding of composite bed 2 processing integral body;
B, the copper nickel multiple tube that will process qualified bevel for welding again dock assembling;
C and then weld assembling qualified copper nickel multiple tube when assembling qualified copper nickel multiple tube and weld, is undertaken by following step, adopts the weld seam 11 of going to a grassroots level of GTAW welding composite bed 2 one sides earlier; And then in basic unit's 1 one sides back chipping is carried out at the back side of the weld seam 11 of going to a grassroots level and handle; Then adopt basic unit's weld seam 12 on all of flux-cored arc welding welding basic unit 1 one sides; Then smooth by the welding of first transition zone weld seam 3 back composite bed weld seams 21 again, adopt ambrose alloy welding wire GTAW to weld the transition zone weld seam 3 and composite bed weld seam 21 of composite bed 2 one sides, up to the butt weld of complete interface of welding; Simultaneously, when transition zone weld seam that welds composite bed 2 one sides 3 and composite bed weld seam 21, adopt the welding method of individual layer multiple tracks to weld respectively.After adopting above-mentioned construction method,, thereby dwindled the welding capacity of transition zone weld seam 3 and composite bed weld seam 21 greatly because bevel for welding makes whole two-sided K into; Simultaneously, when welding transition layer weld seam 3 and composite bed weld seam 21, all adopt the welding manner of individual layer multiple tracks; Welding pool is greatly diminished, thereby the distance that makes liquid state in the welding pool need to flow diminishes, the interpenetrative scope between three kinds of metals is also littler; Like this; The gas flow that when welding, fuses in the liquid molten pool metal just greatly reduces, and then has effectively reduced the possibility that in welding process, produces gas hole defect, and then effectively raises weldquality.What individual layer multiple tracks welding manner of the present invention was meant, divides two or more welding beads to fill and is welded during certain one deck weld seam in welding, is 2mm * 8mm such as the size of composite bed weld seam 21 cross sections; Then the thickness of this layer weld seam is two 2mm; Adopt two welding beads to fill and be welded, then the width of each filler pass is 4mm, and promptly the size of the cross section of each filler pass is 2mm * 4mm; Certainly; When forming welding bead, because mother metal will melt a part, so the cross-sectional area of the actual welding bead that forms can be greater than above-mentioned size.Certainly, if when the thickness of weld seam is bigger, can adopt the multilayer welding manner, under the prerequisite of multilayer welding manner, adopt the multiple tracks welding can achieve the above object too again, promptly usually said multi-pass welding connects.
In the above-mentioned embodiment; For the thickness that makes transition zone weld seam 3 as much as possible little; Thereby reduce the welding capacity of transition zone weld seam 3; To the whole two-sided K type bevel for welding of the basic unit of copper nickel multiple tube 1 and composite bed 2 processing the time, the peak 4 of K type groove protrusion is positioned in the basic unit 1, this peak 4 to the distance of composite bed 2 outer surfaces one side less than distance to basic unit's 1 outer surface, one side.After adopting the bevel for welding of this structure; Because the thickness of transition zone weld seam 3 is very little; So the welding pool that when welding transition layer weld seam, forms is also very little, the gas that can fuse in the molten bath is also just less relatively, even under the very poor situation of flowability; Also can preferably gas be discharged, thereby reduce the formation of welding pore to greatest extent.
Reduce welding pool; Except the method and many welding beads form of taking above-mentioned change groove; Welding parameter also is to need to consider; So when transition zone weld seam 3 and composite bed weld seam 21 were welded, its interlayer temperature was less than 150 ℃, welding current is got lower limit, weldingvoltage and the speed of welding of welding material operation instructions regulation and is got welding material operation instructions set upper limit value.
Close in order to guarantee 100% flaw detection; Accomplish the weld seam 11 of going to a grassroots level of composite bed 2 one sides in welding after, weld the attending before basic unit's weld seam 12 of basic unit's 1 one sides again, need carry out the back chipping processing the weld seam 11 of going to a grassroots level of welding earlier; For fear of other back chipping mode at the root of weld place residual other impurity; Reduce welding performance, when basic unit's 1 one sides are carried out the back chipping processing to the weld seam 11 of going to a grassroots level, adopt emery wheel angle grinding machine that the root of the weld seam 11 of going to a grassroots level is carried out back chipping.
Claims (4)
1. the construction method of copper nickel multiple tube butt welding may further comprise the steps,
A, elder generation are to the basic unit (1) of the copper nickel multiple tube of needs butt joint and the two-sided K type bevel for welding of composite bed (2) processing integral body;
B, the copper nickel multiple tube that will process qualified bevel for welding again dock assembling;
C and then the qualified copper nickel multiple tube of butt joint assembling weld, and when assembling qualified copper nickel multiple tube and weld, are undertaken by following step, adopt the weld seam of going to a grassroots level (11) of GTAW welding composite bed (2) one sides earlier; And then in basic unit's (1) one side back chipping is carried out at the back side of the weld seam of going to a grassroots level (11) and handle; Then adopt basic unit's weld seam (12) on all of flux-cored arc welding welding basic unit (1) one side; Then, adopt the transition zone weld seam (3) and the composite bed weld seam (21) of ambrose alloy welding wire GTAW welding composite bed (2) one sides, up to the butt weld of complete interface of welding again by the welding sequence of first transition zone weld seam (3) back composite bed weld seam (21); Simultaneously, when transition zone weld seam (3) that welds composite bed (2) one sides and composite bed weld seam (21), adopt the welding method of individual layer multiple tracks to weld respectively.
2. the construction method of a kind of copper nickel multiple tube according to claim 1 butt welding; It is characterized in that: the time the whole two-sided K type bevel for welding of the basic unit (1) of copper nickel multiple tube and composite bed (2) processing; The peak (4) of K type groove protrusion is positioned in the basic unit (1), and this peak (4) arrives the distance of composite bed (2) outer surface one side less than the distance to basic unit (1) outer surface one side.
3. the construction method of a kind of copper nickel multiple tube according to claim 1 butt welding is characterized in that: when basic unit's (1) one side is carried out the back chipping processing to the weld seam of going to a grassroots level (11), adopt the angle grinding machine that the root of the weld seam of going to a grassroots level (11) is carried out back chipping.
4. according to the construction method of claim 11,2 or 3 described a kind of copper nickel multiple tube butt welding; It is characterized in that: to transition zone weld seam (3) and composite bed weld seam (21) when welding; Its interlayer temperature is less than 150 ℃, and welding current is got lower limit, weldingvoltage and the speed of welding of welding material operation instructions regulation and got welding material operation instructions set upper limit value.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102941397A (en) * | 2012-10-09 | 2013-02-27 | 中冶南方(武汉)威仕工业炉有限公司 | Argon tungsten arc welding method for nickel-based alloy |
| CN103317217A (en) * | 2013-03-14 | 2013-09-25 | 上海振华重工(集团)股份有限公司 | Weld pore control method for nickel-copper alloy pipes |
| CN103978292A (en) * | 2014-05-26 | 2014-08-13 | 北京隆盛泰科石油管科技有限公司 | Duplex-metal metallurgical composite pipe finished through quadruple welding and process method thereof |
| CN104801826A (en) * | 2015-03-24 | 2015-07-29 | 中国海洋石油总公司 | Bimetal composite pipe both-side welding process |
| CN105252116A (en) * | 2015-10-10 | 2016-01-20 | 西安交通大学 | Bi-metal metallurgy composite pipe welding method |
| CN106287031A (en) * | 2016-07-27 | 2017-01-04 | 郑州万达重工股份有限公司 | A kind of composite pipe and tube groove form |
| CN114083240A (en) * | 2021-11-29 | 2022-02-25 | 贵州天义电器有限责任公司 | Welding method for two-body conductive block |
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| CN101982282A (en) * | 2010-11-16 | 2011-03-02 | 四川电力建设三公司 | Welding technology for butt welding of composite boards |
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| JPS62282781A (en) * | 1986-05-30 | 1987-12-08 | Mitsubishi Heavy Ind Ltd | Butt welding method for clad steel |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102941397A (en) * | 2012-10-09 | 2013-02-27 | 中冶南方(武汉)威仕工业炉有限公司 | Argon tungsten arc welding method for nickel-based alloy |
| CN103317217A (en) * | 2013-03-14 | 2013-09-25 | 上海振华重工(集团)股份有限公司 | Weld pore control method for nickel-copper alloy pipes |
| CN103317217B (en) * | 2013-03-14 | 2015-08-19 | 上海振华重工(集团)股份有限公司 | Copper-nickel alloy tube weld blowhole control method |
| CN103978292A (en) * | 2014-05-26 | 2014-08-13 | 北京隆盛泰科石油管科技有限公司 | Duplex-metal metallurgical composite pipe finished through quadruple welding and process method thereof |
| CN103978292B (en) * | 2014-05-26 | 2016-09-28 | 北京隆盛泰科石油管科技有限公司 | Bimetal metallurgy multiple tube that four roads have welded and process thereof |
| CN104801826A (en) * | 2015-03-24 | 2015-07-29 | 中国海洋石油总公司 | Bimetal composite pipe both-side welding process |
| CN104801826B (en) * | 2015-03-24 | 2017-07-11 | 中国海洋石油总公司 | The process of composite bimetal pipe two-sided welding |
| CN105252116A (en) * | 2015-10-10 | 2016-01-20 | 西安交通大学 | Bi-metal metallurgy composite pipe welding method |
| CN106287031A (en) * | 2016-07-27 | 2017-01-04 | 郑州万达重工股份有限公司 | A kind of composite pipe and tube groove form |
| CN114083240A (en) * | 2021-11-29 | 2022-02-25 | 贵州天义电器有限责任公司 | Welding method for two-body conductive block |
| CN114083240B (en) * | 2021-11-29 | 2024-03-01 | 贵州天义电器有限责任公司 | Welding method for two-body conductive block |
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Application publication date: 20120104 |