CN108161177A - A kind of opening conduit end increases the welding technique of cobalt-based stiffening layer - Google Patents
A kind of opening conduit end increases the welding technique of cobalt-based stiffening layer Download PDFInfo
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- CN108161177A CN108161177A CN201711427397.2A CN201711427397A CN108161177A CN 108161177 A CN108161177 A CN 108161177A CN 201711427397 A CN201711427397 A CN 201711427397A CN 108161177 A CN108161177 A CN 108161177A
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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
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
- B23K9/044—Built-up welding on three-dimensional surfaces
- B23K9/046—Built-up welding on three-dimensional surfaces on surfaces of revolution
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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
- B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded
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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
- B23K9/235—Preliminary treatment
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Abstract
The invention discloses the welding techniques that a kind of opening conduit end increases cobalt-based stiffening layer, include the following steps：S1, an end plate is provided, the front of the end plate utilizes the cobalt-based stiffening layer that cobalt-based wlding built-up welding formation is adapted to opening conduit internal via shape；S2, built-up welding is carried out to sidewall opening using cobalt-based wlding, including carrying out built-up welding to axially open face and arc opening face, S3, end plate is placed on to the open-ended of pipeline and makes the edge of cobalt-based layer with being welded and fixed after pipe end is open and lateral opening matches；The welding technique can realize that opening conduit end increases cobalt-based stiffening layer, and ensures that the quality of cobalt-based stiffening layer is met the requirements.
Description
Technical field
The present invention relates to the welderings that a kind of welding technique more particularly to a kind of opening conduit end increase cobalt-based stiffening layer
Connect process.
Background technology
The deposited metal intensity of cobalt-based stiffening layer wlding is high, and hardness is big, fire check or cold crack is easily generated, if crackle
Depth extends to base metals surface hereinafter, then built-up welding product is unqualified.And for the detection of product crack depth, at present
There are no cost-effective methods.And some pipelines are needed to increase using cobalt-based stiffening layer to wear-resisting more demanding
The abrasion resistant effect of pipeline.
Opening conduit end mentioned in the present invention refers to circular pipe end opening tool there are one open-ended, pipeline
End sidewalls are also open, and there are one sidewall openings for tool；Open-ended place needs welded end plate, and sidewall opening is used for changing material
Flow direction, the opening conduit increase cobalt-based stiffening layer of right this shape is just more difficult, be easy to cause built-up welding part distortion, overlay cladding
Face checking, overlay cladding right angle intersection portion faces cracking, compares the quality for being difficult to guarantee stiffening layer component.
Invention content
The technical problems to be solved by the invention are：There is provided a kind of opening conduit end increases the Welder of cobalt-based stiffening layer
Process, the welding technique can realize that opening conduit end increases cobalt-based stiffening layer, and ensures cobalt-based stiffening layer
Quality is met the requirements.
In order to solve the above technical problems, the technical scheme is that：A kind of opening conduit end increases cobalt-based stiffening layer
Welding technique, include the following steps：
S1, an end plate is provided, the front of the end plate is fitted using cobalt-based wlding built-up welding formation with opening conduit internal via shape
The cobalt-based stiffening layer matched；
S2, pipeline opening include open-ended and sidewall opening, the sidewall opening include two sections of axially extending axial directions
Opening face and the arc opening face of one section of arc extension；Built-up welding is carried out to sidewall opening using cobalt-based wlding, is specifically included following
Step：
Pipeline is preheated before S21, weldering, preheating temperature is more than 96 DEG C, and cobalt-based wlding is required drying and processing according to the rules；
S22, built-up welding is carried out two layers to endoporus near surface of the tubing at sidewall opening by the way of single-run welding and total
Thickness is more than 3mm, and interlayer temperature is not less than preheating temperature；Per Ceng Han tri- and weld when do not swing, welding every layer welding bead with
The welding direction of previous welding bead is opposite；When welding every layer of next welding bead, deposited metal width is overlapped upper joint buildup metal
/ 3rd of width；
S23, built-up welding is carried out to the arc opening face of tubing by the way of single-run welding, included the following steps：
S231, the right angle intersected to arc opening face and axially open face are polished into arc transition；
S232, two piece of first run-on tab, plate face and the arc opening face of the first run-on tab are first welded in the outer surface of tubing
Concordantly, two piece of first run-on tab is located at corresponding axially open face respectively；
S233, continuous downhand welding is drawn behind arc opening face to another piece first after one of first end tab starting the arc
Arc plate receives arc, and two layers of built-up welding, every layer of common twice, thickness is more than 3mm, and interlayer temperature is not less than preheating temperature；
S234, postwelding reconditioning deposited metal toe of weld make itself and axially open face rounding off, and take out the first run-on tab；
S24, cobalt-based built-up welding is carried out to the axially open face of tubing by the way of single-run welding, two layers of built-up welding, every layer totally two
Road, thickness are more than 3mm, and interlayer temperature is not less than preheating temperature；It includes the following steps：
S241, two piece of second run-on tab, plate face and the axially open face of the second run-on tab are first welded in the outer surface of tubing
Concordantly, two piece of second run-on tab is located at the side in corresponding axially open face respectively；
It is continuously flushed until the end in axially open face after one of end tab starting the arc when S242, first of pass weld
Portion's end receives arc；To one of extraction after the end end starting the arc in axially open face continuously welding during second pass weld
Arc is received on plate；
S243, with the welding manner identical with step S242 to another axially open surface build-up welding；
S244, postwelding reconditioning deposited metal toe of weld, make itself and arc opening face rounding off；
S3, end plate is placed on the open-ended of pipeline and make cobalt-based layer edge and pipe end opening and lateral opening
It is welded and fixed after matching；
Wherein preferred, the method for the positive surface build-up welding of step S1 end plates includes the following steps：
S11, the reversed pre-bending of circular blank that will make end plate, the one side to arch upward are front；
S12, preweld cleaning is carried out to blank；
S13, draw built-up welding boundary line in blank front, the built-up welding boundary line and pipe end be open and lateral opening it is interior
The distance between wall is 0-0.5mm；
S14, to built-up welding region carry out divide form symmetrical first built-up welding region and the second built-up welding region；
S15, cobalt-based built-up welding first layer is proceeded by the first built-up welding region and the second built-up welding region respectively, from the first built-up welding
The joint in region and the second built-up welding region start to both sides by road weld, when welding next welding bead, welding direction with it is preceding together
On the contrary；Interlayer temperature is not less than preheating temperature；Deposited metal width is overlapped 1/3rd of upper joint buildup metal width, rises
Toe of weld should be with base material rounding off at arc, and arc crater will be filled up at arc by receiving, it is found that crackle is polished removing in time；
After the completion of S16, first layer welding, layer quality is checked, it is found that the position of built-up welding thinner thickness makes a mark；
S17, second layer welding is carried out in a manner that step S15 is identical, suitably thickeies built-up welding layer thickness when marking position,
The overall thickness of two layers of built-up welding is made to be more than 3mm；
S18, heap postwelding blank is machined out.
Wherein preferred, the machining steps in the step S18 are：
S181, polishing first is processed to the outer diameter of blank, the outer diameter for making blank is equal with the outer diameter of tubing；
S182, blank outer rim draw in a thickness direction one polishing datum line；
S183, removing of being polished on the basis of datum line of polishing the plate face region except built-up welding boundary line are smooth；
S184, it polishes flat to the cobalt-based stiffened layer surface within built-up welding boundary line, the thickness control of cobalt-based stiffening layer exists
Between 3-5mm；
S185, Milling Process is carried out to the back side of blank and make milling put down after the back side and the distance between polishing datum line it is full
Sufficient technological requirement.
It is wherein preferred, it must remove surface in described step S22, S23, S24, S16, S17, after the completion of per pass welding and lack
It falls into；Each layer of welding is required for carrying out 100%MT or PT detections.
After employing above-mentioned technical proposal, effect of the invention is：In the welding technique, cobalt-based first is welded to end plate
Stiffening layer then when the sidewall opening to opening conduit carries out cobalt-based built-up welding, first carries out the endoporus near surface of sidewall opening
Welding；Then using run-on tab using single-run welding, non-oscillatory welding manner carries out heap to axially open face and arc opening face
Cobalt-based wlding is welded, welding operation is simpler, and high-quality cobalt-based stiffening layer is more readily formed in downhand welding mode；Finally by end plate and
It is welded again after the open-ended cooperation of pipeline, can thus improve the wearability of opening conduit end and opening.
Again since the positive surface build-up welding of step S1 end plates employs above-mentioned method, built-up welding again after the reversed predeformation of end plate
Cobalt-based stiffening layer welds the deflection smaller of end plate, more convenient to be welded on pipe end.
Description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the pipeline configuration schematic diagram after the welding of the embodiment of the present invention；
Fig. 2 is sectional views of the Fig. 1 at A-A
Fig. 3 is the structure diagram of end plate blank；
Fig. 4 is that the welding bead of the cobalt-based stiffening layer on end plate moves towards schematic diagram；
Fig. 5 is the structure diagram after outer diameter machines；
Fig. 6 is the structure diagram behind the plate face region polished except built-up welding boundary line
Fig. 7 is the structure diagram for welding arc opening face；
Fig. 8 is that structural formula when welding axially open face is intended to；
In attached drawing：1st, pipeline；11. axially open face；12. arc opening face；It is 13. open-ended；14. endoporus near surface；
2. end plate；3. blank；4. built-up welding boundary line；5. cobalt-based stiffening layer；6. the first run-on tab；7th, the second run-on tab.
Specific embodiment
Below by specific embodiment, the present invention is described in further detail.
As shown in Figures 1 to 8, a kind of opening conduit end increases the welding technique of cobalt-based stiffening layer, including with
Lower step：
S1, an end plate is provided, the front of the end plate is fitted using cobalt-based wlding built-up welding formation with opening conduit internal via shape
The cobalt-based stiffening layer matched；
Wherein, the method for the positive surface build-up welding of step S1 end plates includes the following steps：
S11, the reversed pre-bending of circular blank that will make end plate, the one side to arch upward are front, and the size of circular blank is more than
The diameter of tubing, as shown in Figure 3；
S12, preweld cleaning is carried out to blank, with acetone soln cleaning blank surface oil stain, dirt etc.；
S13, draw built-up welding boundary line in blank front, the built-up welding boundary line and pipe end be open and lateral opening it is interior
The distance between wall is 0-0.5mm；
S14, to built-up welding region carry out divide form symmetrical first built-up welding region and the second built-up welding region；
S15, as shown in figure 4, proceed by cobalt-based built-up welding first layer to the first built-up welding region and the second built-up welding region respectively,
It is welded since the joint in the first built-up welding region and the second built-up welding region to both sides by road, in Fig. 4, the first built-up welding region is a left side
Side, according to placement state in Fig. 4, the first built-up welding region is welded to the left by road, and the second built-up welding regional location is in right side side, the
It is welded to the right by road in two built-up welding regions；Welding is not swung, welding parameter meets WPS regulations using single-run welding；Weld next weldering
During road, welding direction with it is preceding opposite together；Interlayer temperature is not less than preheating temperature；Deposited metal width is overlapped a upper joint buildup
/ 3rd of metal width, toe of weld should be with base material rounding off at the starting the arc, and arc crater will be filled up by receiving at arc, it is found that crackle is timely
Polishing is removed；
After the completion of S16, first layer welding, layer quality is checked, it is found that the position of built-up welding thinner thickness makes a mark；
S17, second layer welding is carried out in a manner that step S15 is identical, suitably thickeies built-up welding layer thickness when marking position,
The overall thickness of two layers of built-up welding is made to be more than 3mm；
S18, heap postwelding blank is machined out.
Machining steps in wherein described step S18 are：
S181, polishing first is processed to the outer diameter of blank, the outer diameter for making blank is equal with the outer diameter of tubing；Such as Fig. 5 institutes
Show；Processing polishing may be used the mode that machine turnery processing and manual grinding are combined and carry out polishing outer edge；
S182, blank outer rim draw in a thickness direction one polishing datum line；
S183, it is put down as shown in fig. 6, being removed on the basis of datum line of polishing to the plate face region polishing except built-up welding boundary line
Whole, which is realized by the way of manual grinding；
S184, it polishes flat to the cobalt-based stiffened layer surface within built-up welding boundary line, the thickness control of cobalt-based stiffening layer exists
Between 3-5mm；
S185, Milling Process is carried out to the back side of blank and make milling put down after the back side and the distance between polishing datum line it is full
Sufficient technological requirement.
End plate is made to meet requirement after above-mentioned processing in this way, the cobalt-based stiffening layer on end plate is just and opening conduit
Internal via shape adaptation.End plate uses predeformation, and therefore, when carrying out cobalt-based built-up welding, blank can deform, so as to gradually put down
It is whole, while the crackle that can also reduce cobalt-based stiffening layer generates.
S2, pipeline opening include open-ended and sidewall opening, the sidewall opening include two sections of axially extending axial directions
Opening face and the arc opening face of one section of arc extension；Built-up welding is carried out to sidewall opening using cobalt-based wlding, is specifically included following
Step：
Pipeline is preheated before S21, weldering, preheating temperature is more than 96 DEG C, and cobalt-based wlding is required drying and processing according to the rules；
S22, built-up welding is carried out two layers to endoporus near surface of the tubing at sidewall opening by the way of single-run welding and total
Thickness is more than 3mm, and interlayer temperature is not less than preheating temperature；Per Ceng Han tri- and weld when do not swing, welding every layer welding bead with
The welding direction of previous welding bead is opposite；When welding every layer of next welding bead, deposited metal width is overlapped upper joint buildup metal
/ 3rd of width；Innermost one of weld seam is first welded during welding, then is gradually soldered to sidewall opening inner wall edge, it is advantageous in this way
In the situation of observation deposition, ensure surfacing quality；
S23, built-up welding is carried out to the arc opening face of tubing by the way of single-run welding, welding wire is not swung during welding, is wrapped
Include following steps：
S231, the right angle intersected to arc opening face and axially open face are polished into arc transition；
S232, as shown in fig. 7, first the outer surface of tubing weld two piece of first run-on tab, the plate face of the first run-on tab with
Arc opening face is concordant, and two piece of first run-on tab is located at corresponding axially open face respectively；
S233, continuous downhand welding is drawn behind arc opening face to another piece first after one of first end tab starting the arc
Arc plate receives arc, and two layers of built-up welding, every layer of common twice, thickness is more than 3mm, and interlayer temperature is not less than preheating temperature；
S234, postwelding reconditioning deposited metal toe of weld make itself and axially open face rounding off, and take out the first run-on tab；
S24, cobalt-based built-up welding being carried out to the axially open face of tubing by the way of single-run welding, welding wire is not swung during welding,
Two layers of built-up welding, every layer of common twice, thickness are more than 3mm, and interlayer temperature is not less than preheating temperature；It includes the following steps：
S241, as shown in figure 8, first the outer surface of tubing weld two piece of second run-on tab, the plate face of the second run-on tab with
Axially open face is concordant, and two piece of second run-on tab is located at the side in corresponding axially open face respectively；
It is continuously flushed until the end in axially open face after one of end tab starting the arc when S242, first of pass weld
Portion's end receives arc；To one of extraction after the end end starting the arc in axially open face continuously welding during second pass weld
Arc is received on plate；
S243, with the welding manner identical with step S242 to another axially open surface build-up welding；
S244, postwelding reconditioning deposited metal toe of weld, make itself and arc opening face rounding off；
S3, end plate is placed on the open-ended of pipeline and make cobalt-based layer edge and pipe end opening and lateral opening
It is welded and fixed after matching；The welding procedure is using conventional technique according to WPS regulation parameter welding.
It is wherein preferred, it is every surface must to be removed in described step S22, S23, S24, S16, S17, after the completion of per pass welding
Road welding after the completion of must remove surface welding slag, do not merge, stomata the defects of；The crackle at the starting the arc and receipts arc is removed in polishing；Weldering
Temperature between strictly being controlled in termination process prevents overheat from occurring, in welder's operating process, welding rod is forbidden to be swung；Each layer
Welding is required for carrying out 100%MT or PT detections.
Embodiment described above is only the description to the preferred embodiment of the present invention, not as the limit to the scope of the invention
Fixed, the various modifications made to technical solution of the present invention on the basis of design spirit of the present invention is not departed from and transformation should all be fallen
Enter in the protection domain that claims of the present invention determines.
Claims (4)
1. a kind of opening conduit end increases the welding technique of cobalt-based stiffening layer, include the following steps：
S1, an end plate is provided, the front of the end plate utilizes what cobalt-based wlding built-up welding formation was adapted to opening conduit internal via shape
Cobalt-based stiffening layer；
S2, pipeline opening include open-ended and sidewall opening, the sidewall opening include two sections of axially extending axially opens
Face and the arc opening face of one section of arc extension；Built-up welding is carried out to sidewall opening using cobalt-based wlding, specifically includes following steps：
Pipeline is preheated before S21, weldering, preheating temperature is more than 96 DEG C, and cobalt-based wlding is required drying and processing according to the rules；
S22, built-up welding is carried out two layers to endoporus near surface of the tubing at sidewall opening by the way of single-run welding and overall thickness
More than 3mm, interlayer temperature is not less than preheating temperature；Per Ceng Han tri- and weld when do not swing, welding every layer welding bead with it is previous
The welding direction of welding bead is opposite；When welding every layer of next welding bead, deposited metal width is overlapped upper joint buildup metal width
1/3rd；
S23, built-up welding is carried out to the arc opening face of tubing by the way of single-run welding, included the following steps：
S231, the right angle intersected to arc opening face and axially open face are polished into arc transition；
S232, two piece of first run-on tab first is welded in the outer surface of tubing, the plate face of the first run-on tab is concordant with arc opening face,
Two piece of first run-on tab is located at corresponding axially open face respectively；
S233, after one of first end tab starting the arc continuous downhand welding behind arc opening face to another piece of the first run-on tab
Arc is received, two layers of built-up welding, every layer of common twice, thickness is more than 3mm, and interlayer temperature is not less than preheating temperature；
S234, postwelding reconditioning deposited metal toe of weld make itself and axially open face rounding off, and take out the first run-on tab；
S24, cobalt-based built-up welding, two layers of built-up welding, every layer of common twice, thickness are carried out to the axially open face of tubing by the way of single-run welding
Degree is more than 3mm, and interlayer temperature is not less than preheating temperature；It includes the following steps：
S241, two piece of second run-on tab first is welded in the outer surface of tubing, the plate face of the second run-on tab is concordant with axially open face,
Two piece of second run-on tab is located at the side in corresponding axially open face respectively；
It is continuously flushed after one of end tab starting the arc until the end in axially open face is use up when S242, first of pass weld
Head receives arc；To on one of end tab after the end end starting the arc in axially open face continuously welding during second pass weld
Receive arc；
S243, with the welding manner identical with step S242 to another axially open surface build-up welding；
S244, postwelding reconditioning deposited metal toe of weld, make itself and arc opening face rounding off；
S3, end plate is placed on to the open-ended of pipeline and the edge of cobalt-based layer is made to be matched with pipe end opening and lateral opening
After be welded and fixed.
2. a kind of opening conduit end as described in claim 1 increases the welding technique of cobalt-based stiffening layer, feature exists
In：The method of the positive surface build-up welding of step S1 end plates includes the following steps：
S11, the reversed pre-bending of circular blank that will make end plate, the one side to arch upward are front；
S12, preweld cleaning is carried out to blank；
S13, draw built-up welding boundary line in blank front, the built-up welding boundary line and pipe end be open and the inner wall of lateral opening it
Between distance be 0-0.5mm；
S14, to built-up welding region carry out divide form symmetrical first built-up welding region and the second built-up welding region；
S15, cobalt-based built-up welding first layer is proceeded by the first built-up welding region and the second built-up welding region respectively, from the first built-up welding region
With the joint in the second built-up welding region start to both sides by road weld, when welding next welding bead, welding direction with it is preceding opposite together；
Interlayer temperature is not less than preheating temperature；Deposited metal width is overlapped 1/3rd of upper joint buildup metal width, at the starting the arc
Toe of weld should be with base material rounding off, and arc crater will be filled up at arc by receiving, it is found that crackle is polished removing in time；
After the completion of S16, first layer welding, layer quality is checked, it is found that the position of built-up welding thinner thickness makes a mark；
S17, second layer welding is carried out in a manner that step S15 is identical, suitably thickeies built-up welding layer thickness when marking position, make heap
The overall thickness that two layers of weldering is more than 3mm；
S18, heap postwelding blank is machined out.
3. a kind of opening conduit end as claimed in claim 2 increases the welding technique of cobalt-based stiffening layer, feature exists
In：Machining steps in the step S18 are：
S181, polishing first is processed to the outer diameter of blank, the outer diameter for making blank is equal with the outer diameter of tubing；
S182, blank outer rim draw in a thickness direction one polishing datum line；
S183, removing of being polished on the basis of datum line of polishing the plate face region except built-up welding boundary line are smooth；
S184, it polishes flat to the cobalt-based stiffened layer surface within built-up welding boundary line, the thickness control of cobalt-based stiffening layer is in 3-5mm
Between；
S185, Milling Process is carried out to the back side of blank and make milling put down after the distance between the back side and polishing datum line meet work
Skill requirement.
4. a kind of opening conduit end as claimed in claim 3 increases the welding technique of cobalt-based stiffening layer, feature exists
In：In described step S22, S23, S24, S16, S17, surface defect must be removed after the completion of per pass welding；Each layer of welding is all
It needs to carry out 100%MT or PT detections.
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| CN201711427397.2A CN108161177B (en) | 2017-12-26 | 2017-12-26 | Welding process method for adding cobalt-based hardened layer to end part of open pipeline |
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|---|---|---|---|
| CN201711427397.2A CN108161177B (en) | 2017-12-26 | 2017-12-26 | Welding process method for adding cobalt-based hardened layer to end part of open pipeline |
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| CN108161177B CN108161177B (en) | 2020-05-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111872632A (en) * | 2020-06-12 | 2020-11-03 | 中国二冶集团有限公司 | Method for manufacturing open pipeline |
| CN114309880A (en) * | 2022-01-28 | 2022-04-12 | 安徽马钢设备检修有限公司 | Welding repair process for surface wear part of upright post hole of lower cross beam of large hydraulic press |
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| CN111872632B (en) * | 2020-06-12 | 2023-06-20 | 中国二冶集团有限公司 | Manufacturing method of open pipeline |
| CN114309880A (en) * | 2022-01-28 | 2022-04-12 | 安徽马钢设备检修有限公司 | Welding repair process for surface wear part of upright post hole of lower cross beam of large hydraulic press |
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