CN107322141A - A kind of welding repair method of crank axle for vessel local defect - Google Patents
A kind of welding repair method of crank axle for vessel local defect Download PDFInfo
- Publication number
- CN107322141A CN107322141A CN201710514576.3A CN201710514576A CN107322141A CN 107322141 A CN107322141 A CN 107322141A CN 201710514576 A CN201710514576 A CN 201710514576A CN 107322141 A CN107322141 A CN 107322141A
- Authority
- CN
- China
- Prior art keywords
- welding
- local defect
- repair method
- crank axle
- carries out
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 119
- 238000000034 method Methods 0.000 title claims abstract description 43
- 230000007547 defect Effects 0.000 title claims abstract description 31
- 230000008439 repair process Effects 0.000 title claims abstract description 23
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000007789 gas Substances 0.000 claims abstract description 21
- 229910052786 argon Inorganic materials 0.000 claims abstract description 13
- 238000005498 polishing Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims abstract description 7
- 238000000227 grinding Methods 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 239000006247 magnetic powder Substances 0.000 claims description 3
- UYISUKAIFLQFNV-UHFFFAOYSA-N [Ar].[Ni] Chemical compound [Ar].[Ni] UYISUKAIFLQFNV-UHFFFAOYSA-N 0.000 claims description 2
- 238000004321 preservation Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000010583 slow cooling Methods 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
Classifications
-
- 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
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- 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
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/164—Arc welding or cutting making use of shielding gas making use of a moving fluid
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
A kind of welding repair method of crank axle for vessel local defect, the material of the bent axle is S34MnV, it is characterized in that, without weld preheating, but the local defect of the crankshaft surface is repaired by cold welding method, the welding repair method includes, and the defect to the crankshaft surface carries out grinding process before welding, prime coat is formed using argon arc welding again, then using CO2Gas shielded arc welding is filled the welding of capping layer, finally carries out reconditioning polishing to repairing surface.Present invention, avoiding the cumbersome technique of weld preheating, postweld heat preservation slow cooling, reduce and reprocess cost, have the advantages that technique is simple, workable, operating efficiency is high simultaneously, available for the repairing and maintenance of the local defect of crank axle for vessel, with very high practicality.
Description
Technical field
The present invention relates to the renovation technique of marine diesel part, and in particular to a kind of welding of crank axle for vessel local defect
Restorative procedure, belongs to welding technology field.
Background technology
Bent axle mainly carries power transmission as the core component of engine, is important in engine operation process
One of moving parts.In high-power marine low-speed diesel engine, crank axle for vessel is large-scale processing forging, and size is big, quality is big, has
Length reach more than ten meters, quality tons up to a hundred, cost accounts for 20% or so of diesel engine totle drilling cost.Crank axle for vessel is in transport, peace
During dress occasional occur it is local damage and the defect such as wear and tear, due to high costs, once generation problems, typically to song
Axle takes local route repair treatment measures.Traditional restorative procedure mainly uses supersonic spray coating, i.e., in metal surface using spraying
Mode accumulate layer of metal powder so that reach repair surface damage purpose.But supersonic spray coating is to equipment, product surface
The requirement of state is higher, while it is also high to reprocess cost, is unfavorable for increasing economic efficiency.Also a kind of restorative procedure of crank axle for vessel
Be exactly to use welding method, but generally require progress weld preheating and postweld heat preservation slow cooling, thus efficiency is low, operation difficulty compared with
Greatly.Therefore, it is just significant using more simple effective method for the local route repair of impaired bent axle.
The content of the invention
It is an object of the present invention to be repaiied in view of the shortcomings of the prior art there is provided a kind of welding of crank axle for vessel local defect
Compound method, it is to avoid the preheating in repair process, carries out REPAIR WELDING, so as to reach using cold welding method to the local defect of crank axle for vessel
Cost is reprocessed to saving, improves and reprocesses efficiency, the effect of guarantee product quality.
In order to realize the above object the technical scheme that the present invention is provided is as follows：
A kind of welding repair method of crank axle for vessel local defect, the material of the bent axle is S34MnV, it is characterised in that no
Weld preheating is carried out, but the local defect of the crankshaft surface is repaired by cold welding method, the welding repair method
Including the defect to the crankshaft surface carries out grinding process before welding, then forms prime coat using argon arc welding, then uses
CO2Gas shielded arc welding is filled the welding of capping layer, finally carries out reconditioning polishing to repairing surface.
Further, the described defect progress grinding process before welding to the crankshaft surface refers to, to the song
The surface of the local defect progress reconditioning processing on axle surface, formation welding groove, the groove and the bent axle is in 50~60 degree
Angle, makes welding position rounding off, and carry out cleaning treatment to the region in the range of 50mm around welding position.
Further, described use argon arc welding forms prime coat and referred to, using a diameter of 2.0 millimeters of pure nickel argon arc welding
GTN-Ni1 welding wires carry out bottoming welding by argon tungsten-arc welding, and its welding condition is as follows：Welding current is 150~200A,
Arc length is 1~3mm；Using purity >=99.99% of argon gas, gas flow is 10~12L/min；Welding gun is put in crescent
Dynamic, amplitude of fluctuation is 1~2mm；The thickness of the prime coat of formation is 2~3mm；The GTN-Ni1 welding wires meet AWS A5.14
ERNi-1 standards.
Further, described use CO2The welding that gas shielded arc welding is filled capping layer refers to, using a diameter of
1.2mm GFL-71Ni welding wires pass through CO2Gas shielded arc welding carries out welding filling capping layer, and its welding condition is as follows：Weldering
Electric current is connect for 180~220A, weldingvoltage is 25~28V；Using CO2Purity >=99.98% of gas, gas flow be 15~
25L/min；Welding gun is swung in crescent, and amplitude of fluctuation is 1~2mm, and dry extension of electrode degree is 15-25mm, and welding is until fill up
The upper surface of the groove and filling capping layer is higher by 1~2mm of mother metal surface；The GFL-71Ni welding wires meet AWS
A5.20 E71T-1 standards.
Further, it is described to refer to that welding terminates latter 24 hours, to welding position to repairing surface progress reconditioning polishing
Carry out MT magnetic powder inspections, it is qualified after to welding position carry out reconditioning polishing.
Compared with prior art, the present invention carries out reparation welding using cold welding method, it is to avoid weld preheating, postweld heat preservation delay
Cold cumbersome technique, reduces and reprocesses cost, while having the advantages that technique is simple, workable, operating efficiency is high, can use
In the repairing and maintenance of the local defect of crank axle for vessel, with very high practicality.
Brief description of the drawings
Fig. 1 repairs the view before welding for the present invention.
Welding bead arrangement schematic diagram after Fig. 2 repairs for the present invention.
Embodiment
Come to make further detailed to automatic soldering technique method of the present invention with specific embodiment below in conjunction with the accompanying drawings
Illustrate, but can not be limited the scope of the invention with this.
The invention provides a kind of local defect welding repair method of S34MnV materials bent axle, marine diesel can be applied to
The reparation of machine crankshaft local defect, it uses cold welding method to be welded, it is to avoid the problem of weld preheating, with efficiency high, behaviour
Make the features such as simple, process is easily achieved.
The material of crank axle for vessel involved in the present invention is S34MnV, and its chemical composition is shown in Table 1：
The S34MnV chemical compositions of table 1
| C% | Si% | Mn% | P% | S% | Cr% | V% |
| 0.34 | 0.25 | 1.2 | 0.01 | 0.005 | 0.05 | 0.1 |
Its mechanical property is shown in Table 2：
The S34MnV mechanical properties of table 2
| Yield strength (MPa) | Tensile strength (Mpa) | Elongation |
| 395Mpa | 650Mpa | 30% |
The welding repair method of the crank axle for vessel local defect is without weld preheating, but by cold welding method to described
The local defect of crankshaft surface is repaired.
The welding repair method includes：
Welding preparation
Referring to Fig. 1, before REPAIR WELDING, the local defect to crankshaft surface carries out reconditioning processing, makes the to be repaired of bent axle
Complex surface formation welding groove, groove, in 50~60 degree of angles, makes welding position rounding off with crankshaft surface, and to weld part
Cleaning treatment is carried out in the range of the surrounding 50mm of position.
Argon arc welding forms prime coat
Referring to Fig. 2, after groove prepares and soldering areas adjacent is cleaned out, backing welding is carried out using argon tungsten-arc welding
Connect；Welding wire is GTN-Ni1, is pure nickel argon-arc welding wire, and 2.0 millimeters of diameter, welding wire meets AWS A5.14ERNi-1 standards；Weldering
The purity of argon used is connect for >=99.99%, gas flow is 10~12L/min；Welding current is 150~200A, and electric arc is long
Spend 1~3mm；Welding wire welding gun is swung in crescent, and amplitude of fluctuation is 1~2mm；The thickness of prime coat 1 is 2~3mm.
CO2Gas shielded arc welding is filled the welding of capping layer
Referring to Fig. 2, after the completion of bottom argon arc welding, using CO2Gas shielded arc welding carries out welding filling capping layer 2；Welding wire
For GFL-71Ni, diameter 1.2mm, welding wire meets AWS A5.20E71T-1 standards；Welding uses pure CO2Gas, gas purity
It is required that more than 99.98, CO2Gas flow is 15~25L/min；180~220A of welding current, 25~28V of voltage；Welding wire is dry to be stretched
Length 15-25mm, welding gun is swung in crescent, and amplitude of fluctuation is 1~2mm；Welding is until filling up welding groove and being higher by mother
1~2mm of material surface.
Reconditioning polishing is carried out to repairing surface
Welding terminate after 24 hours, to welding position carry out MT magnetic powder inspections, it is qualified after to welding position carry out reconditioning throwing
Light.
The present invention, can with very strong application value for the reparation of the crank axle for vessel local defect of S34MnV materials
Cost is reprocessed in reduction, while technique is simple, it is workable, with good application prospect.
It is above presently preferred embodiments of the present invention, for persons skilled in the art, without departing substantially from of the invention former
Any obvious equivalent or equivalent modifications on the premise of reason and spirit to made by it, should all be contemplated as falling with this
Within invention scope of the claims.
Claims (5)
1. a kind of welding repair method of crank axle for vessel local defect, the material of the bent axle is S34MnV, it is characterised in that do not entered
Row weld preheating, but the local defect of the crankshaft surface is repaired by cold welding method, the welding repair method bag
Include, the defect to the crankshaft surface carries out grinding process before welding, then forms prime coat using argon arc welding, then uses
CO2Gas shielded arc welding is filled the welding of capping layer, finally carries out reconditioning polishing to repairing surface.
2. the welding repair method of crank axle for vessel local defect according to claim 1, it is characterised in that described in weldering
The local defect to the crankshaft surface, which is carried out at reconditioning, to be referred to the defect progress grinding process of the crankshaft surface before connecing
Reason, forms welding groove, the surface of the groove and the bent axle is in 50~60 degree of angles, makes welding position rounding off, and right
Region around welding position in the range of 50mm carries out cleaning treatment.
3. the welding repair method of crank axle for vessel local defect according to claim 1, it is characterised in that described use
Argon arc welding forms prime coat and referred to, is entered using a diameter of 2.0 millimeters of pure nickel argon arc welding GTN-Ni1 welding wires by argon tungsten-arc welding
Row bottoming is welded, and its welding condition is as follows：Welding current is 150~200A, and arc length is 1~3mm；Using argon gas
Purity >=99.99%, gas flow is 10~12L/min；Welding gun is swung in crescent, and amplitude of fluctuation is 1~2mm；Formed
The thickness of prime coat is 2~3mm；The GTN-Ni1 welding wires meet AWS A5.14ERNi-1 standards.
4. the welding repair method of crank axle for vessel local defect according to claim 1, it is characterised in that described use
CO2The welding that gas shielded arc welding is filled capping layer refers to, CO is passed through using a diameter of 1.2mm GFL-71Ni welding wires2Gas
Protection weldering carries out welding filling capping layer, and its welding condition is as follows：Welding current is 180~220A, and weldingvoltage is 25
~28V；Using CO2Purity >=99.98% of gas, gas flow is 15~25L/min；Welding gun is swung in crescent, is swung
Amplitude be 1~2mm, dry extension of electrode degree be 15-25mm, welding until fill up the groove and the filling capping layer it is upper
Surface is higher by 1~2mm of mother metal surface；The GFL-71Ni welding wires meet AWS A5.20E71T-1 standards.
5. the welding repair method of crank axle for vessel local defect according to claim 1, it is characterised in that described to repairing
Complex surface carry out reconditioning polishing refers to, welding terminate after 24 hours, to welding position carry out MT magnetic powder inspections, it is qualified after to welding
Position carries out reconditioning polishing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710514576.3A CN107322141A (en) | 2017-06-29 | 2017-06-29 | A kind of welding repair method of crank axle for vessel local defect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710514576.3A CN107322141A (en) | 2017-06-29 | 2017-06-29 | A kind of welding repair method of crank axle for vessel local defect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107322141A true CN107322141A (en) | 2017-11-07 |
Family
ID=60197308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710514576.3A Pending CN107322141A (en) | 2017-06-29 | 2017-06-29 | A kind of welding repair method of crank axle for vessel local defect |
Country Status (1)
| Country | Link |
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| CN (1) | CN107322141A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108620808A (en) * | 2018-05-09 | 2018-10-09 | 河南鑫轴传动机械有限公司 | A kind of transmission shaft injury repair technique |
| CN108767338A (en) * | 2018-05-04 | 2018-11-06 | 东莞塔菲尔新能源科技有限公司 | A method of it repairing battery case and head cover welds burst point |
| CN109079421A (en) * | 2018-10-30 | 2018-12-25 | 西南交通大学 | A kind of method that locomotive buffer bar surface reconditioning remanufactures |
| CN111438426A (en) * | 2020-04-16 | 2020-07-24 | 哈尔滨锅炉厂有限责任公司 | By using CO2Method for welding boiler header part by gas shielded welding technology |
| CN112188945A (en) * | 2018-05-23 | 2021-01-05 | 西门子股份公司 | Manufacture welding and maintenance welding of nodular cast iron |
| CN112496503A (en) * | 2020-11-30 | 2021-03-16 | 中国南方电网有限责任公司超高压输电公司昆明局 | High-altitude cold welding repair method for defects of superficial holes of drainage plate of strain compression joint pipe |
| CN113210801A (en) * | 2021-06-16 | 2021-08-06 | 安徽马钢设备检修有限公司 | Welding device and repairing process for large crankshaft fracture of high-pressure pump body |
| CN114147379A (en) * | 2021-11-12 | 2022-03-08 | 中车戚墅堰机车车辆工艺研究所有限公司 | Cold welding repair process for rail damage |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108767338A (en) * | 2018-05-04 | 2018-11-06 | 东莞塔菲尔新能源科技有限公司 | A method of it repairing battery case and head cover welds burst point |
| CN108767338B (en) * | 2018-05-04 | 2020-03-24 | 东莞塔菲尔新能源科技有限公司 | Method for repairing welding explosion point of battery shell and top cover |
| CN108620808A (en) * | 2018-05-09 | 2018-10-09 | 河南鑫轴传动机械有限公司 | A kind of transmission shaft injury repair technique |
| CN112188945A (en) * | 2018-05-23 | 2021-01-05 | 西门子股份公司 | Manufacture welding and maintenance welding of nodular cast iron |
| CN109079421A (en) * | 2018-10-30 | 2018-12-25 | 西南交通大学 | A kind of method that locomotive buffer bar surface reconditioning remanufactures |
| CN109079421B (en) * | 2018-10-30 | 2019-09-24 | 西南交通大学 | A kind of method that locomotive buffer bar surface reconditioning remanufactures |
| CN111438426A (en) * | 2020-04-16 | 2020-07-24 | 哈尔滨锅炉厂有限责任公司 | By using CO2Method for welding boiler header part by gas shielded welding technology |
| CN112496503A (en) * | 2020-11-30 | 2021-03-16 | 中国南方电网有限责任公司超高压输电公司昆明局 | High-altitude cold welding repair method for defects of superficial holes of drainage plate of strain compression joint pipe |
| CN113210801A (en) * | 2021-06-16 | 2021-08-06 | 安徽马钢设备检修有限公司 | Welding device and repairing process for large crankshaft fracture of high-pressure pump body |
| CN114147379A (en) * | 2021-11-12 | 2022-03-08 | 中车戚墅堰机车车辆工艺研究所有限公司 | Cold welding repair process for rail damage |
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