CN105414782A - Isolated layer surfacing method of dissimilar steel welding joint - Google Patents
Isolated layer surfacing method of dissimilar steel welding joint Download PDFInfo
- Publication number
- CN105414782A CN105414782A CN201510805552.4A CN201510805552A CN105414782A CN 105414782 A CN105414782 A CN 105414782A CN 201510805552 A CN201510805552 A CN 201510805552A CN 105414782 A CN105414782 A CN 105414782A
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- pore
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- separation layer
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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
- 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
- B23K31/02—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 soldering or welding
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/18—Dissimilar materials
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention relates to the field of welding of dissimilar steel pipe joints on workpieces, and discloses an isolated layer surfacing method, which has the advantage of reducing dissimilar steel pipe joint welding operation difficulty, of a dissimilarsteel welding joint. The isolated layer surfacing method comprises the following steps: an isolated layer welded joint is positioned at a pore of a workpiece; a base plate is prepared according to the size of the pore; a groove, which is 4-5 mm deep and is corresponding to the pore, is formed in the base plate, a slag leaking hole is formed in the center of the base plate, and the base plate is arranged on the wall of the workpiece through spot welding; the position of the workpiece is adjusted, so that the center line of the pore of the workpiece is perpendicular to the ground, and the base plate is positioned below the pore, and when the isolated layer surfacing is conducted, a lower weld bead of an isolated layer is always kept to be slightly wider than or consistent with an upper weld bead adjacent to the lower weld bead; and after the isolated layer surfacing is completed, the base plate is removed, and the isolated layer welded joint is processed to met the design requirement. The size and the position of the slag leaking hole are determined on the premise that the width of the isolated layer welded joint is ensured. Through the adoption of the method, frequent position adjustment of the workpiece is avoided, the purpose that the inner wall isolated layer of the pore is always surfaced at the downhand position is achieved, the welding difficulty is reduced, and the welding quality is ensured.
Description
Technical field
The present invention relates to heterogenous steel pipe weld field on workpiece, especially a kind of buttering method.
Background technology
At present, nuclear power technology has entered generation Ⅲ nuclear power heap-type, having in generation Ⅲ nuclear power unit nuclear island container products on more carbon steel or low alloy steel cylindrical shell/end socket needs welding to run through the adapter of plug-in type stainless steel, material is thus formed Dissimilar Steel Welded Joint, by designing requirement, dissimilar steel joint needs in carbon steel/low-alloy steel side built-up welding stainless steel or Ni-based separation layer in advance, and separation layer just can carry out the welding of follow-up nozzle weld after carrying out flaw detection is qualified.Three generations's unit nuclear power container products stock size is comparatively large, and weight is very large, and general manufacturing enterprise is difficult to incumbent meaning displacement in fact, and especially to large-size cylinder body, the flexible displacement that will realize except accumbency and vertically-arranged when pore inner wall overlaying is substantially impossible.Pore inner wall overlaying when parts invariant position on it is as adopted traditional surface overlaying mode, then need to carry out to put down, horizontal, vertical, face upward the welding of each position, in this case the welding of pore inwall separation layer is docked, traditional mode is exactly manual all-position welding, welding positions, region different on circle side face is different, and operating space is limited, overlay-operation difficulty is large, poor welding quality, easy generation slag inclusion, the defects such as incomplete fusion, separation layer and carbon steel/low-alloy steel faying face also easily crack very much.
Have backing plate joint in existing welding method, backing plate is generally used for butt weld place, and its way places one piece of backing plate identical with matrix constituent, can obtain the weld seam of complete penetraction and fusion in welding when welding, root is unlikely again to be burnt.
Summary of the invention
The defect that operating difficulties during in order to overcome existing heterogenous steel pipe weld, welding quality are poor, technical problem to be solved by this invention is to provide a kind of Dissimilar Steel Welded Joint buttering method reducing heterogenous steel pipe weld operation easier.
The technical solution adopted for the present invention to solve the technical problems is: Dissimilar Steel Welded Joint separation layer weld seam overlaying method, described separation layer weld seam is positioned at the pore place on workpiece, according to the size of pore, prepare backing plate and the groove with certain depth that processing is corresponding with pore on backing plate, backing plate point is welded on the wall of workpiece; The adjustment location of workpiece makes the central axis of its pore in ground and backing plate is positioned at below pore, during buttering welding, ensures its lower floor's welding bead all the time slightly wider than the upper strata welding bead be adjacent or be at least consistent; After buttering completes, remove backing plate, processing separation layer weld seam is to designing requirement.
Described backing plate point is welded in the outside wall surface of workpiece, and the internal diameter of its groove is consistent with the opening diameter of pore outer wall side, and the degree of depth of groove is 4 ~ 5mm.
Described backing plate center is provided with leakage cinder hole, and size and the position of leaking cinder hole are determined by the width of guarantee separation layer weld seam.
The material of described backing plate is identical with the material of separation layer weld seam or close.
The invention has the beneficial effects as follows: avoid workpiece and repeatedly conjugate, achieve pore inwall separation layer all the time in downhand position operation, reduce welding difficulty.
Accompanying drawing explanation
Fig. 1 is workpiece and adapter welding equipment schematic diagram.
Fig. 2 is the partial enlarged drawing that Fig. 1 takes over position.
Fig. 3 is the schematic diagram utilizing the inventive method to carry out buttering.
Be labeled as in figure: workpiece 1, pore 2, separation layer weld seam 3, backing plate 4, welding rod 5, welding bead 6, inner wall overlaying layer 7, nozzle weld 8, adapter 9, groove 41, leak cinder hole 42.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described.
As shown in Figure 1, Figure 2 and Figure 3, Dissimilar Steel Welded Joint separation layer weld seam overlaying method of the present invention, Dissimilar Steel Welded Joint separation layer weld seam overlaying method, described separation layer weld seam 3 is positioned at pore 2 place on workpiece 1, according to the size of pore 2, prepare backing plate 4 and the groove 41 with certain depth that processing is corresponding with pore 2 on backing plate 4, reserve surplus for buttering completes aft-loaded airfoil separation layer weld seam, 4, backing plate is welded on the wall of workpiece 1; Adjustment workpiece 1 position makes the central axis of its pore 2 in ground and backing plate 4 is positioned at below pore 2, during buttering welding, ensures its lower floor's welding bead all the time slightly wider than the upper strata welding bead be adjacent or be at least consistent; After buttering completes, remove backing plate 4,3 to the designing requirement of processing separation layer weld seam.Backing plate 4 plays a liner effect to follow-up buttering deposited metal, the separation layer weld seam of all positon built-up welding itself is needed to be transformed into the groove weld built-up welding of downhand position, during welding, workpiece 1 does not need repeatedly to adjust displacement, greatly reduces welding difficulty, thus ensure that welding quality.
4, described backing plate is welded in the outside wall surface of workpiece 1, to facilitate removal, and do not have influence on the inner wall overlaying layer 7 that workpiece inner wall may exist, the internal diameter of its groove 41 is consistent with the opening diameter of pore 2 outer wall side, the degree of depth of groove 41 is 4 ~ 5mm, for processing separation layer weld seam reserves surplus, but exceed waste welding rod, and facilitate contraposition.
For ease of weld cleaning, best described backing plate 4 center is also provided with Lou cinder hole 42, should be noted that the size of Lou cinder hole 42 and position are determined by the width of guarantee separation layer weld seam 3.
For ensureing welding quality, the material of described backing plate 4 is identical with the material of separation layer weld seam 3 or close.
embodiment:
As shown in Figure 1, Figure 2, Figure 3 shows, certain cylinder-shaped workpiece 1 needs connection four adapters 9, this workpiece 1 is the stack shell of the upright container used, and its material is 20MnMo IV, internal diameter 1200mm, wall thickness 80mm, the diameter as the outer wall side of the pore of stub (tube) is 196mm, takes over as austenitic stainless steel, therebetween cannot directly weld, therefore, pore 2 place is provided with separation layer weld seam 3, and separation layer material is chosen as stainless steel.
To the built-up welding of this adapter hole stainless steel separation layer, traditional mode is exactly, and is disposed across by stack shell on turning rolls, and during built-up welding, holding tube axially bored line is parallel to the ground, carries out all-position welding, and during welding, operator is in the outside welding of cylindrical shell.Owing to needing the lasting change coordinating cylindrical shell position in welding process, welding operation difficulty is large, and weldquality not easily ensures.For this reason, the welding of follow-up pore has been suspended afterwards at the inner wall overlaying layer being soldered a pore, and Non-Destructive Testing has been carried out to completed pore inner wall overlaying layer, found that the more display that exceeds standard appears in the inwall stainless steel separation layer of this pore, with mother metal melt run even there is crackle in place.
After in-depth analysis, adopt overlaying method of the present invention, that is:
(1) according to the size of pore 2, previously prepared stainless backing plate 4, and in backing plate 4 central area, process the groove 41 of a diameter 196mm in advance, the degree of depth of groove 41 is 4mm;
(2) before buttering, 4, backing plate is welded in cartridge bore outer wall, makes pore 2 external diameter corresponding with the recess region of backing plate;
(3) rotating cylinder, adjust to and make it for the pore central axis of row isolation weldering in the position on ground, operator welds in inner barrel, carries out successively built-up welding by downhand position as described in Figure 3, every one deck built-up welding 3 is enclosed, and namely every layer of number of weld passes is 3; Under buttering weld seam the welding bead of one deck slightly wider than its adjacent upper welding bead or be at least consistent, make lower floor's weld seam as the liner of upper strata weld seam;
(4), after built-up welding completes, machined is removed backing plate and is processed separation layer weld seam to design size requirement.
Such scheme reprocessing first for the pore stainless steel separation layer piled first.After the defective separation layer of removal, adopt the method for improvement to reprocess, after completing, PT and UT testing result is once qualified.After again built-up welding has been carried out to remaining three adapter hole separation layers, result of detection is also once qualified.
Claims (4)
1. Dissimilar Steel Welded Joint separation layer weld seam overlaying method, described separation layer weld seam (3) is positioned at pore (2) place on workpiece (1), it is characterized in that: according to the size of pore (2), prepare backing plate (4) and at backing plate (4) groove (41) with certain depth that above processing is corresponding with pore (2), backing plate (4) point be welded on the wall of workpiece (1); Adjustment workpiece (1) position makes the central axis of its pore (2) in ground and backing plate (4) is positioned at pore (2) below, during buttering welding, ensures its lower floor's welding bead all the time slightly wider than the upper strata welding bead be adjacent or be at least consistent; After buttering completes, remove backing plate (4), processing separation layer weld seam (3) is to designing requirement.
2. Dissimilar Steel Welded Joint separation layer weld seam overlaying method as claimed in claim 1, it is characterized in that: described backing plate (4) point is welded in the outside wall surface of workpiece (1), the internal diameter of its groove (41) is consistent with the opening diameter of pore (2) outer wall side, and the degree of depth of groove (41) is 4 ~ 5mm.
3. Dissimilar Steel Welded Joint separation layer weld seam overlaying method as claimed in claim 1 or 2, is characterized in that: described backing plate (4) center is provided with Lou cinder hole (42), and size and the position of leaking cinder hole (42) are determined by the width of guarantee separation layer weld seam (3).
4. Dissimilar Steel Welded Joint separation layer weld seam overlaying method as claimed in claim 1 or 2, is characterized in that: the material of described backing plate (4) is identical or close with the material of separation layer weld seam (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510805552.4A CN105414782B (en) | 2015-11-20 | 2015-11-20 | Dissimilar Steel Welded Joint buttering method |
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| CN201510805552.4A CN105414782B (en) | 2015-11-20 | 2015-11-20 | Dissimilar Steel Welded Joint buttering method |
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| CN105414782A true CN105414782A (en) | 2016-03-23 |
| CN105414782B CN105414782B (en) | 2017-10-17 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106239055A (en) * | 2016-08-29 | 2016-12-21 | 东方电气集团东方锅炉股份有限公司 | The design of a kind of heavy wall dissimilar steel joint groove and processing method |
| CN111716030A (en) * | 2020-05-27 | 2020-09-29 | 共享铸钢有限公司 | Combined welding method for austenitic stainless steel structural member and low-alloy steel casting |
| CN112453642A (en) * | 2020-10-14 | 2021-03-09 | 沈阳鼓风机集团核电泵业有限公司 | Welding method for impeller locking bolt and locking pin |
| CN112756835A (en) * | 2021-01-29 | 2021-05-07 | 东方电气集团东方锅炉股份有限公司 | Method for processing surfacing layer of butt weld of tube plate |
| CN115041860A (en) * | 2022-06-09 | 2022-09-13 | 哈尔滨电机厂有限责任公司 | Novel head measuring body welding structure of hydroelectric ultrahigh water head unit |
| CN115319244A (en) * | 2022-09-05 | 2022-11-11 | 中国石油化工股份有限公司 | Dissimilar steel welding process |
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| CN101745709A (en) * | 2009-12-21 | 2010-06-23 | 哈尔滨工业大学 | Assistant coating TIG fusing-brazing method suitable for aluminum/steel dissimilar alloy butting |
| CN102528243A (en) * | 2011-12-15 | 2012-07-04 | 哈尔滨工业大学 | Arc welding-brazing method for titanium-aluminum dissimilar alloy TIG (tungsten inert gas) arc preheating |
| CN103894711A (en) * | 2014-03-14 | 2014-07-02 | 东方电气集团东方锅炉股份有限公司 | Dissimilar material welding method for processing temperature difference at high temperature |
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| CN104191074A (en) * | 2014-09-11 | 2014-12-10 | 兰州西固热电有限责任公司 | Heterogeneous austenite system steel welding method |
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| JP2003080392A (en) * | 2001-09-07 | 2003-03-18 | Mitsubishi Heavy Ind Ltd | Welding repair structure and welding repair method of pipe |
| CN101745709A (en) * | 2009-12-21 | 2010-06-23 | 哈尔滨工业大学 | Assistant coating TIG fusing-brazing method suitable for aluminum/steel dissimilar alloy butting |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106239055A (en) * | 2016-08-29 | 2016-12-21 | 东方电气集团东方锅炉股份有限公司 | The design of a kind of heavy wall dissimilar steel joint groove and processing method |
| CN111716030A (en) * | 2020-05-27 | 2020-09-29 | 共享铸钢有限公司 | Combined welding method for austenitic stainless steel structural member and low-alloy steel casting |
| CN111716030B (en) * | 2020-05-27 | 2022-02-22 | 共享铸钢有限公司 | Combined welding method for austenitic stainless steel structural member and low-alloy steel casting |
| CN112453642A (en) * | 2020-10-14 | 2021-03-09 | 沈阳鼓风机集团核电泵业有限公司 | Welding method for impeller locking bolt and locking pin |
| CN112453642B (en) * | 2020-10-14 | 2022-07-12 | 沈阳鼓风机集团核电泵业有限公司 | Welding method for impeller locking bolt and locking pin |
| CN112756835A (en) * | 2021-01-29 | 2021-05-07 | 东方电气集团东方锅炉股份有限公司 | Method for processing surfacing layer of butt weld of tube plate |
| CN115041860A (en) * | 2022-06-09 | 2022-09-13 | 哈尔滨电机厂有限责任公司 | Novel head measuring body welding structure of hydroelectric ultrahigh water head unit |
| CN115041860B (en) * | 2022-06-09 | 2023-11-14 | 哈尔滨电机厂有限责任公司 | Water and electricity superhigh water head unit gauge head body welded structure |
| CN115319244A (en) * | 2022-09-05 | 2022-11-11 | 中国石油化工股份有限公司 | Dissimilar steel welding process |
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| CN105414782B (en) | 2017-10-17 |
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