CN105312743A - On-site repair welding method for 5A06 aluminum barrel finished product welding joint stress corrosion crack - Google Patents
On-site repair welding method for 5A06 aluminum barrel finished product welding joint stress corrosion crack Download PDFInfo
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- CN105312743A CN105312743A CN201510721742.8A CN201510721742A CN105312743A CN 105312743 A CN105312743 A CN 105312743A CN 201510721742 A CN201510721742 A CN 201510721742A CN 105312743 A CN105312743 A CN 105312743A
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- welding
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- repair welding
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- aluminum barrel
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a 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
- B23K9/235—Preliminary treatment
-
- 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
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/10—Aluminium or alloys thereof
Abstract
The invention discloses an on-site repair welding method for a 5A06 aluminum barrel finished product welding joint stress corrosion crack, and belongs to the technical field of aluminum alloy structural member welding. The on-site repair welding method for the 5A06 aluminum barrel finished product welding joint stress corrosion crack can achieve product defect on-site repair without separating an aluminum barrel from a lathe with a high qualified rate. According to the technical scheme, the on-site repair welding method for the 5A06 aluminum barrel finished product welding joint stress corrosion crack comprises the following steps that 1 the repair welding method is selected, a welding technological parameter is determined, and a destressing mode and a technological parameter are determined; 2 the type and the size of a groove needing repair welding are determined, and a welding groove is prepared; 3 repair welding is conducted with the selected welding technological parameter; 4 a hammer is adopted for hammering a surface-layer welding joint of the repair-welding welding joint for destressing; and 5 liquid penetrant test is adopted for assisting in checking whether the repair-welding surface of the welding joint has the crack or not. The on-site repair welding method for the 5A06 aluminum barrel finished product welding joint stress corrosion crack is mainly used for conducting defect on-site repair for the 5A06 aluminum barrel finished product without separating the aluminum barrel from the lathe.
Description
Technical field
The on-the-spot repair welding method of 5A06 aluminum barrel finished product weld stress corrosion cracking of the present invention, belongs to the welding technology field of aluminum alloy junction component.
Background technology
5A06 is AL-Mg system rustproof aluminum alloy, there are higher intensity and corrosion resistance, annealing and squeezed state under plasticity fair, still can with the weld joint air-tight of argon arc welding and plastic property of weld bead, the strength of welded joint of gas welding and spot welding is matrix strength 90% ~ 95%, welding performance is good, but the intensity of material own is lower, and welding deformation is large.
At present, when in-plant aluminum barrel (section) carries out bead crack repair welding, cylindrical shell is installed on rolling wheel support, and cylindrical shell rolling, to suitable level " ship type " welding operation station, can ensure repair welding quality requirement.But, under the unseparated restrictive condition of car cylinder, aluminum barrel top and level two side weld be there is to the Welding Repair process of crack defect, still lack research.
Summary of the invention
The present invention overcomes the deficiency that prior art exists, and technical problem to be solved is to provide the on-the-spot repair welding method of a kind of 5A06 aluminum barrel finished product weld stress corrosion cracking, can complete the defect field repair of product under car cylinder not separation condition in high pass rate.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is: the on-the-spot repair welding method of 5A06 aluminum barrel finished product weld stress corrosion cracking, processes according to following steps:
The first step, selects the welding method of repair welding, determines welding condition, determine destressing mode and technological parameter;
Second step, determines groove type and the size of repair welding, prepares bevel for welding, adjustment divided edge structure;
3rd step, carries out repair welding with selected welding condition;
4th step, with the destressing parameter determined, adopts the top layer weld seam of hammer to repair welding weld seam to carry out hammering destressing;
5th step, repair welding completes to be cooled to room temperature, and butt welded seam reinforcement carries out polishing and flushes with mother metal, adopts its repair welding surface of dye penetrant inspection auxiliary examination to have flawless.
The welding method of described first step repair welding is selected semi-automatic MIG mode of welding and is carried out repair welding, implements overhead welding or vertical position welding station manipulation.
The welding condition of described 3rd step comprises welding wire model and diameter, welding current, weldingvoltage, gas flow and speed of welding.
When described second step prepares bevel for welding, butt welded seam defect is cleared up, ensure defect clear up completely in situation groove little as far as possible, clean out simultaneously and treat welding zone peripheral extent internal oxidition film, dirt etc., welding position after cleaning and welding wire forbid bare-handed or dirty hand etc. to contact, adopt the cleaning of dye penetrant inspection auxiliary examination defect whether thorough, ensure that defect is cleaned out.
After described weld defect cleaning completely, treating 30 ~ 40mm place propping process support rods near repair welding district, strut two ends adopt thin aluminum sheet dottle pin, stretching process support rods.
The bevel for welding of described second step is prepared as the standby or manual preparation of machine.
Hammer in described 4th step is spherical end.
The beneficial effect that the present invention is compared with the existing technology had is: employing comprises weld defect and prepares the technological processes such as groove, repair welding, destressing and carrying out flaw detection, complete the defect field repair of product under car cylinder not separation condition, and qualification rate is high.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is process flow diagram of the present invention.
Fig. 2 is typical groove type schematic diagram.
Detailed description of the invention
As shown in Figure 1, the on-the-spot repair welding method of 5A06 aluminum barrel finished product weld stress corrosion cracking, process according to following steps:
The first step, selects the welding method of repair welding, determines welding condition, determine destressing mode and technological parameter;
Second step, determines groove type and the size of repair welding, prepares bevel for welding, adjustment divided edge structure;
3rd step, carries out repair welding with selected welding condition;
4th step, with the destressing parameter determined, adopts the top layer weld seam of hammer to repair welding weld seam to carry out hammering destressing, and when repair welding district need carry out layering weldering, each layer weld seam of bottom forbids hammering, and hammering operation only carries out top layer weld seam;
5th step, repair welding completes to be cooled to room temperature, and butt welded seam reinforcement carries out polishing and flushes with mother metal, adopts its repair welding surface of dye penetrant inspection auxiliary examination to have flawless.
The welding method of described first step repair welding is selected semi-automatic MIG mode of welding and is carried out repair welding, implements overhead welding or vertical position welding station manipulation.
The welding condition of described 3rd step comprises welding wire model and diameter, welding current, weldingvoltage, gas flow and speed of welding.
When described second step prepares bevel for welding, butt welded seam defect is cleared up, ensure defect clear up completely in situation groove little as far as possible, clean out simultaneously and treat welding zone peripheral extent internal oxidition film, dirt etc., welding position after cleaning and welding wire forbid bare-handed or dirty hand etc. to contact, adopt the cleaning of dye penetrant inspection auxiliary examination defect whether thorough, ensure that defect is cleaned out.
After described weld defect cleaning completely, treating 30 ~ 40mm place propping process support rods near repair welding district, strut two ends adopt thin aluminum sheet dottle pin, stretching process support rods.
The bevel for welding of described second step is prepared as the standby or manual preparation of machine.
Hammer in described 4th step is spherical end.
Cannot realize around axial revolution at car cylinder unseparated condition lower shell, adopt the mode of repair welding to carry out reparation and need carry out overhead welding and vertical position welding station manipulation, the structural member for aluminum alloy material welds, particularly repair welding, and it is very large that operation realizes difficulty.
Below in conjunction with embodiment, the present invention is further elaborated.The 5A06 aluminum barrel finished product bead crack repair welding of wall thickness 20mm, process according to following steps:
The first step, selected semi-automatic MIG mode of welding carries out repair welding, overhead welding or vertical position welding station all can implementation and operations, selected welding wire model 5A06-H18, gage of wire φ 1.6mm, welding current 190 ~ 230A, weldingvoltage 22 ~ 25V, gas flow 20 ~ 24L/min, speed of welding 400 ~ 550mm/min, destressing adopts hammer to carry out hammering destressing to repair welding weld seam, hammer heavily about 0.6kg, the time is about 20-30 minute, hammering per minute 150 ~ 200 times;
Second step, determines groove type and the size of repair welding, mechanical or manually prepares bevel for welding (long × wide × dark) 50mm × 10mm × 10mm, adjustment divided edge structure, groove type after typical defect cleaning as shown in Figure 2, A is 5A06 aluminum barrel finished product, B is groove, groove two ends allow to make ship type structure, butt welded seam defect is cleared up, suitable adjustment divided edge structure, ensure defect clear up completely in situation groove little as far as possible, to facilitate repair welding operation and quality control, clean out simultaneously and treat pad perimeter 30mm scope internal oxidition film, dirt etc., welding position after cleaning and welding wire forbid bare-handed or dirty hand etc. to contact, adopt the cleaning of dye penetrant inspection auxiliary examination defect whether thorough, ensure that defect is cleaned out, after weld defect cleaning completely, treating 30 ~ 40mm place propping process support rods near repair welding district, its position needs repair welding operating personnel to confirm, in order to avoid affect its repair welding operation, protection cylindrical shell and personal security is noted in operation, strut two ends should adopt thin aluminum sheet dottle pin, avoid causing impression to barrel, process support rods stretching,
3rd step, carries out repair welding according to selected repair welding mode and technological parameter;
4th step, after repair welding completes, according to selected destressing technological parameter, adopts hammer to carry out hammering destressing to repair welding weld seam;
5th step, adopts dye penetration inspection repair welding surface to have flawless after repair welding.
The present invention welds place and selects environment temperature >=15 ° C, relative humidity≤75%, ensures that space enrironment cleans dustless, without draught, and noiselessness etc.
The present invention welds and adopts argon gas need meet GB/T4842-2006 " argon " requirement, prohibits the use as storage pressure≤1MPa.Should check before welding that welder equipment ensures normal operation, water route, gas circuit etc. are unobstructed, realization is welded cylinder is outer to confirm welding gun whether line can be met welding machine, if cannot meet, allow suitably to adjust welding machine position according to field condition, ensure to reprocess the normal enforcement of repair welding operation, welding earth connection is directly connected to ground earth point from cylindrical shell, ground earth point earth resistance is less than 4 Ω, should meet welding requirements simultaneously.
In welding process of the present invention, produce defect if find, arc must be stopped immediately, after cleaning out defect with Pneumatic milling cutter or other instrument, then striking welding again.When receiving arc, can be high at rewelding place heap, ensure that heap high altitude is not less than 5mm, must wait for that rewelding place temperature is down to less than 60 DEG C, just can remove heap eminence.
Above embodiments of the invention are explained in detail, but the present invention is not limited to above-described embodiment, in the ken that those of ordinary skill in the art possess, various change can also be made under the prerequisite not departing from present inventive concept.
Claims (7)
- The on-the-spot repair welding method of 1.5A06 aluminum barrel finished product weld stress corrosion cracking, is characterized in that processing according to following steps:The first step, selects the welding method of repair welding, determines welding condition, determine destressing mode and technological parameter;Second step, determines groove type and the size of repair welding, prepares bevel for welding, adjustment divided edge structure;3rd step, carries out repair welding with selected welding condition;4th step, with the destressing parameter determined, adopts the top layer weld seam of hammer to repair welding weld seam to carry out hammering destressing;5th step, repair welding completes to be cooled to room temperature, and butt welded seam reinforcement carries out polishing and flushes with mother metal, adopts its repair welding surface of dye penetrant inspection auxiliary examination to have flawless.
- 2. the on-the-spot repair welding method of 5A06 aluminum barrel finished product weld stress corrosion cracking according to claim 1, is characterized in that: the welding method of described first step repair welding is selected semi-automatic MIG mode of welding and carried out repair welding, implements overhead welding or vertical position welding station manipulation.
- 3. the on-the-spot repair welding method of 5A06 aluminum barrel finished product weld stress corrosion cracking according to claim 1, is characterized in that: the welding condition of described 3rd step comprises welding wire model and diameter, welding current, weldingvoltage, gas flow and speed of welding.
- 4. the on-the-spot repair welding method of the 5A06 aluminum barrel finished product weld stress corrosion cracking according to claim 1-3 any one, it is characterized in that: when described second step prepares bevel for welding, butt welded seam defect is cleared up, ensure defect clear up completely in situation groove little as far as possible, clean out simultaneously and treat welding zone peripheral extent internal oxidition film, dirt etc., welding position after cleaning and welding wire forbid bare-handed or dirty hand etc. to contact, adopt the cleaning of dye penetrant inspection auxiliary examination defect whether thorough, ensure that defect is cleaned out.
- 5. the on-the-spot repair welding method of 5A06 aluminum barrel finished product weld stress corrosion cracking according to claim 4, it is characterized in that: after described weld defect cleaning completely, treating 30 ~ 40mm place propping process support rods near repair welding district, strut two ends adopt thin aluminum sheet dottle pin, stretching process support rods.
- 6. the on-the-spot repair welding method of 5A06 aluminum barrel finished product weld stress corrosion cracking according to claim 5, is characterized in that: the bevel for welding of described second step is prepared as the standby or manual preparation of machine.
- 7. the on-the-spot repair welding method of 5A06 aluminum barrel finished product weld stress corrosion cracking according to claim 6, is characterized in that: the hammer in described 4th step is spherical end.
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Cited By (9)
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| CN106216937A (en) * | 2016-08-16 | 2016-12-14 | 贵州安吉航空精密铸造有限责任公司 | A kind of restorative procedure of ZL114A aluminium alloy castings internal metallurgical defect |
| CN107009003A (en) * | 2017-05-15 | 2017-08-04 | 山东电力基本建设总公司 | The Rework Technics of Condenser Titanium Tube |
| CN108890078A (en) * | 2018-08-24 | 2018-11-27 | 中国华冶科工集团有限公司 | Technique in Boiler Membrane Water Cooled Wall gap weldig defect repair method |
| CN109014510A (en) * | 2018-08-27 | 2018-12-18 | 天津市白津生焊接中心 | Improve the welding method for sending power transformation tube type bus weld seam conductivity |
| CN110449737A (en) * | 2019-08-19 | 2019-11-15 | 芜湖天弋能源科技有限公司 | A method of repairing housing of power cell and the fried point of top cover Laser Welding |
| CN110948091A (en) * | 2018-09-27 | 2020-04-03 | 中国商用飞机有限责任公司 | Manufacturing method of aluminum alloy airtight cavity |
| CN112372106A (en) * | 2020-09-29 | 2021-02-19 | 中车长江车辆有限公司 | Repair welding method for repairing corrosion point on surface of parent metal |
| CN113714606A (en) * | 2020-05-26 | 2021-11-30 | 西安核设备有限公司 | TIG fusion repair process method for defects of laser welding joint |
| CN114799722A (en) * | 2022-04-14 | 2022-07-29 | 江苏海川石化工程技术有限公司 | Rapid repair method for local stress corrosion defect of pressure vessel |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106216937A (en) * | 2016-08-16 | 2016-12-14 | 贵州安吉航空精密铸造有限责任公司 | A kind of restorative procedure of ZL114A aluminium alloy castings internal metallurgical defect |
| CN107009003A (en) * | 2017-05-15 | 2017-08-04 | 山东电力基本建设总公司 | The Rework Technics of Condenser Titanium Tube |
| CN108890078A (en) * | 2018-08-24 | 2018-11-27 | 中国华冶科工集团有限公司 | Technique in Boiler Membrane Water Cooled Wall gap weldig defect repair method |
| CN109014510A (en) * | 2018-08-27 | 2018-12-18 | 天津市白津生焊接中心 | Improve the welding method for sending power transformation tube type bus weld seam conductivity |
| CN110948091A (en) * | 2018-09-27 | 2020-04-03 | 中国商用飞机有限责任公司 | Manufacturing method of aluminum alloy airtight cavity |
| CN110449737A (en) * | 2019-08-19 | 2019-11-15 | 芜湖天弋能源科技有限公司 | A method of repairing housing of power cell and the fried point of top cover Laser Welding |
| CN113714606A (en) * | 2020-05-26 | 2021-11-30 | 西安核设备有限公司 | TIG fusion repair process method for defects of laser welding joint |
| CN113714606B (en) * | 2020-05-26 | 2023-01-31 | 西安核设备有限公司 | TIG fusion repair process method for defects of laser welding joint |
| CN112372106A (en) * | 2020-09-29 | 2021-02-19 | 中车长江车辆有限公司 | Repair welding method for repairing corrosion point on surface of parent metal |
| CN112372106B (en) * | 2020-09-29 | 2022-05-03 | 中车长江车辆有限公司 | Repair welding method for repairing corrosion point on surface of parent metal |
| CN114799722A (en) * | 2022-04-14 | 2022-07-29 | 江苏海川石化工程技术有限公司 | Rapid repair method for local stress corrosion defect of pressure vessel |
| CN114799722B (en) * | 2022-04-14 | 2023-07-21 | 江苏海川石化工程技术有限公司 | Quick repairing method for local stress corrosion defect of pressure vessel |
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Application publication date: 20160210 |