CN108161331A - A kind of welding Rework Technics method of ZG1Cr11Ni2WMoV large sizes casing casting - Google Patents
A kind of welding Rework Technics method of ZG1Cr11Ni2WMoV large sizes casing casting Download PDFInfo
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- CN108161331A CN108161331A CN201711445443.1A CN201711445443A CN108161331A CN 108161331 A CN108161331 A CN 108161331A CN 201711445443 A CN201711445443 A CN 201711445443A CN 108161331 A CN108161331 A CN 108161331A
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- casing casting
- defect
- electric furnace
- casting
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
-
- 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
- B23K9/235—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
- B23P6/002—Repairing turbine components, e.g. moving or stationary blades, rotors
Abstract
The invention discloses a kind of welding Rework Technics methods of ZG1Cr11Ni2WMoV large sizes casing casting, include the following steps：1) it detects：Casing casting is detected with x-ray flaw detector, find defect and passes through exograph and positions defective locations；2) it is heat-treated：It will find that the casing casting of defect is put into electric furnace in step 1) to be heat-treated；3) defect removes：The defects of being excavated with steel bistrique or sanding head on the casing casting after step 2) heat treatment；4) lossless confirmation：Casing casting after defect is removed is detected again with X ray；5) soldering；6) it polishes：Face of weld on casing casting after the completion of soldering is polished flat, is smooth；7) non-destructive testing：It detects the casing casting polished on surface again with X ray, confirms in welding process whether generate the defects of new；8) post weld heat treatment.The present invention can improve the qualification rate of a large-scale soldering of casing casting, reduce number of rewelding, improve casing casting yield.
Description
Technical field
The present invention relates to welding technology field, more particularly to a kind of welding of ZG1Cr11Ni2WMoV large sizes casing casting
Rework Technics method.
Background technology
The large-scale casing casting of existing ZG1Cr11Ni2WMoV materials can inevitably generate various in casting process
Casting flaw, due to the characteristic of ZG1Cr11Ni2WMoV materials and the strict demand of large-scale casing part, utilize traditional casting
Defect mending easily finds postwelding in defect removal and confirmation link up to five or six times repeatedly, Er Qie, postwelding non-destructive testing
There is crackle to show, a soldering qualification rate expends a large amount of manpowers, financial resources and time cost down to 30-40%.
Invention content
The object of the present invention is to provide a kind of welding Rework Technics method of ZG1Cr11Ni2WMoV large sizes casing casting,
The technical issues of effectively can solving to be previously mentioned in background technology.
To achieve the above object, the present invention provides following technical solution：
A kind of welding Rework Technics method of ZG1Cr11Ni2WMoV large sizes casing casting, includes the following steps：
1) it detects：Casing casting is detected with x-ray flaw detector, find defect and passes through exograph and positions defective locations；
2) it is heat-treated：It will find that the casing casting of defect is put into electric furnace in step 1) to be heat-treated, i.e., carried out successively
Full annealing, recrystallization annealing, concrete operations are：Electric furnace is warming up to 860 DEG C, keeps the temperature 10 hours, electric furnace be cooled to 200 DEG C with
Under, then room temperature is air-cooled to, then electric furnace is warming up to 680 DEG C, 6 hours are kept the temperature, electric furnace is cooled to 200 DEG C hereinafter, air-cooled again later
To room temperature；
3) defect removes：The defects of being excavated with steel bistrique or sanding head on the casing casting after step 2) heat treatment, shape
It is cheated into defect, then the bevelled edge that defect is cheated polishes smooth；
4) lossless confirmation：Casing casting after defect is removed is detected again with X ray, it is ensured that defect removes completely；
5) soldering：The casing casting that defect removes completely is integrally preheating to 250 DEG C with electric furnace, with tungsten argon arc weld repair
All defect, welding process ensures temperature at 200 DEG C or more, after welding, casing casting Slow cooling；
6) it polishes：Face of weld on casing casting after the completion of soldering is polished flat, is smooth；
7) non-destructive testing：It detects the casing casting polished on surface again with X ray, confirms whether generated in welding process
The defects of new, for it is new the defects of need according to step 3) -7) repetitive operation；
8) post weld heat treatment：It quenched, be tempered, be tempered successively, concrete operation step is：Electric furnace is warming up to 1050 DEG C,
Heat preservation 10 hours, water cooling；Electric furnace is warming up to 580 DEG C again, keeps the temperature 6 hours, it is air-cooled；Finally, electric furnace is warming up to 580 DEG C, protected
Temperature 6 hours, it is air-cooled.
Compared with prior art, the beneficial effects of the invention are as follows：
ZG1Cr11Ni2WMoV material casing casting weld crack tendency is serious, by the heat treatment of step 2) of the present invention,
The hardness of casing casting is reduced, has refined crystal grain, eliminates casing casting stress, non-destructive testing first-time qualification rate reaches after soldering
95%, by step 8) post weld heat treatment, casing casting coupon performance meets HB5430-2011 requirements；The present invention can improve
The qualification rate of a large-scale soldering of casing casting reduces number of rewelding, improves casing casting yield.
Specific embodiment
The technical solution in the embodiment of the present invention will be clearly and completely described below, it is clear that described implementation
Example is only part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's all other embodiments obtained without making creative work belong to the model that the present invention protects
It encloses.
Embodiment one：
A kind of welding Rework Technics method of ZG1Cr11Ni2WMoV large sizes casing casting, includes the following steps：
1) it detects：Casing casting is detected with x-ray flaw detector, find defect and passes through exograph and positions defective locations；
2) it is heat-treated：It will find that the casing casting of defect is put into electric furnace in step 1) to be heat-treated, i.e., carried out successively
Full annealing, recrystallization annealing, concrete operations are：Electric furnace is warming up to 860 DEG C, keeps the temperature 10 hours, electric furnace be cooled to 200 DEG C with
Under, then room temperature is air-cooled to, then electric furnace is warming up to 680 DEG C, 6 hours are kept the temperature, electric furnace is cooled to 200 DEG C hereinafter, air-cooled again later
To room temperature；
3) defect removes：The defects of being excavated with steel bistrique or sanding head on the casing casting after step 2) heat treatment, shape
It is cheated into defect, then the bevelled edge that defect is cheated polishes smooth；
4) lossless confirmation：Casing casting after defect is removed is detected again with X ray, it is ensured that defect removes completely；
5) soldering：The casing casting that defect removes completely is integrally preheating to 250 DEG C with electric furnace, with tungsten argon arc weld repair
All defect, welding process ensures temperature at 200 DEG C or more, after welding, casing casting Slow cooling；
6) it polishes：Face of weld on casing casting after the completion of soldering is polished flat, is smooth；
7) non-destructive testing：It detects the casing casting polished on surface again with X ray, confirms whether generated in welding process
The defects of new, for it is new the defects of need according to step 3) -7) repetitive operation；
8) post weld heat treatment：It quenched, be tempered, be tempered successively, concrete operation step is：Electric furnace is warming up to 1050 DEG C,
Heat preservation 10 hours, water cooling；Electric furnace is warming up to 580 DEG C again, keeps the temperature 6 hours, it is air-cooled；Finally, electric furnace is warming up to 580 DEG C, protected
Temperature 6 hours, it is air-cooled.
ZG1Cr11Ni2WMoV material casing casting weld crack tendency is serious, by the heat treatment of step 2) of the present invention,
The hardness of casing casting is reduced, has refined crystal grain, eliminates casing casting stress, non-destructive testing first-time qualification rate reaches after soldering
95%, by step 8) post weld heat treatment, casing casting coupon performance meets HB5430-2011 requirements；The present invention can improve
The qualification rate of a large-scale soldering of casing casting reduces number of rewelding, improves casing casting yield.
Above content is only to structure example of the present invention and explanation, affiliated those skilled in the art couple
Described specific embodiment does various modifications or additions or substitutes in a similar way, without departing from invention
Structure surmounts range defined in the claims, is within the scope of protection of the invention.
Claims (1)
- A kind of 1. welding Rework Technics method of ZG1Cr11Ni2WMoV large sizes casing casting, which is characterized in that including following step Suddenly：1) it detects：Casing casting is detected with x-ray flaw detector, find defect and passes through exograph and positions defective locations；2) it is heat-treated：It will find that the casing casting of defect is put into electric furnace in step 1) to be heat-treated, i.e., moved back completely successively Fire, recrystallization annealing, concrete operations are：Electric furnace is warming up to 860 DEG C, keeps the temperature 10 hours, electric furnace is cooled to 200 DEG C hereinafter, again Room temperature is air-cooled to, then electric furnace is warming up to 680 DEG C, keeps the temperature 6 hours, electric furnace is cooled to 200 DEG C hereinafter, being air-cooled to room again later Temperature；3) defect removes：The defects of being excavated with steel bistrique or sanding head on the casing casting after step 2) heat treatment, forms and lacks Pitfall, then the bevelled edge that defect is cheated polish smooth；4) lossless confirmation：Casing casting after defect is removed is detected again with X ray, it is ensured that defect removes completely；5) soldering：The casing casting that defect removes completely is integrally preheating to 250 DEG C with electric furnace, is owned with tungsten argon arc weld repair Defect, welding process ensures temperature at 200 DEG C or more, after welding, casing casting Slow cooling；6) it polishes：Face of weld on casing casting after the completion of soldering is polished flat, is smooth；7) non-destructive testing：It detects the casing casting polished on surface again with X ray, whether is generated in confirmation welding process new Defect, for it is new the defects of need according to step 3) -7) repetitive operation；8) post weld heat treatment：It quenched, be tempered, be tempered successively, concrete operation step is：Electric furnace is warming up to 1050 DEG C, heat preservation 10 hours, water cooling；Electric furnace is warming up to 580 DEG C again, keeps the temperature 6 hours, it is air-cooled；Finally, electric furnace is warming up to 580 DEG C, heat preservation 6 is small When, it is air-cooled.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711445443.1A CN108161331A (en) | 2017-12-27 | 2017-12-27 | A kind of welding Rework Technics method of ZG1Cr11Ni2WMoV large sizes casing casting |
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| CN201711445443.1A CN108161331A (en) | 2017-12-27 | 2017-12-27 | A kind of welding Rework Technics method of ZG1Cr11Ni2WMoV large sizes casing casting |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110625322A (en) * | 2019-08-23 | 2019-12-31 | 北京星航机电装备有限公司 | Method for quickly positioning and accurately repairing internal defect part of complex casting |
| CN110802366A (en) * | 2019-11-14 | 2020-02-18 | 四川航天长征装备制造有限公司 | Drilling repair welding method for aluminum alloy special-shaped structural part |
| CN110947916A (en) * | 2019-12-24 | 2020-04-03 | 安徽应流航源动力科技有限公司 | Large thin-wall precision casting casing part shell manufacturing process method |
| CN112059531A (en) * | 2020-07-24 | 2020-12-11 | 西安航天发动机有限公司 | Method for repairing defects of precision investment casting for liquid rocket engine |
| CN114453825A (en) * | 2022-01-27 | 2022-05-10 | 安徽应流铸业有限公司 | Welding repair method for defects of low-alloy high-strength steel casting |
| CN115213637A (en) * | 2022-07-21 | 2022-10-21 | 昆山西诺巴精密模具有限公司 | Casting casing machining method based on-machine measurement and application thereof |
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| CN102744496A (en) * | 2012-07-05 | 2012-10-24 | 武汉宇宙科技有限公司 | Surface overlaying and processing method for pinch roller manufacturing and repairing |
| CN102886590A (en) * | 2012-10-16 | 2013-01-23 | 重庆望江工业有限公司 | Method for repairing defects of parts by adopting manual arc welding and soaked repair welding |
| CN103962791A (en) * | 2013-02-01 | 2014-08-06 | 哈尔滨建成集团有限公司 | Welding repair method for large-sized heat-resistant steel castings |
| CN105234598A (en) * | 2015-10-19 | 2016-01-13 | 东方电气集团东方汽轮机有限公司 | Material repair welding method of CB2 casting of ultra-supercritical turbine unit |
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| CN202207724U (en) * | 2011-08-31 | 2012-05-02 | 西部钛业有限责任公司 | Sag repair device for thin-wall metal tube |
| CN102744496A (en) * | 2012-07-05 | 2012-10-24 | 武汉宇宙科技有限公司 | Surface overlaying and processing method for pinch roller manufacturing and repairing |
| CN102886590A (en) * | 2012-10-16 | 2013-01-23 | 重庆望江工业有限公司 | Method for repairing defects of parts by adopting manual arc welding and soaked repair welding |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110625322A (en) * | 2019-08-23 | 2019-12-31 | 北京星航机电装备有限公司 | Method for quickly positioning and accurately repairing internal defect part of complex casting |
| CN110625322B (en) * | 2019-08-23 | 2020-07-28 | 北京星航机电装备有限公司 | Method for quickly positioning and accurately repairing internal defect part of complex casting |
| CN110802366A (en) * | 2019-11-14 | 2020-02-18 | 四川航天长征装备制造有限公司 | Drilling repair welding method for aluminum alloy special-shaped structural part |
| CN110947916A (en) * | 2019-12-24 | 2020-04-03 | 安徽应流航源动力科技有限公司 | Large thin-wall precision casting casing part shell manufacturing process method |
| CN112059531A (en) * | 2020-07-24 | 2020-12-11 | 西安航天发动机有限公司 | Method for repairing defects of precision investment casting for liquid rocket engine |
| CN112059531B (en) * | 2020-07-24 | 2022-04-08 | 西安航天发动机有限公司 | Method for repairing defects of precision investment casting for liquid rocket engine |
| CN114453825A (en) * | 2022-01-27 | 2022-05-10 | 安徽应流铸业有限公司 | Welding repair method for defects of low-alloy high-strength steel casting |
| CN115213637A (en) * | 2022-07-21 | 2022-10-21 | 昆山西诺巴精密模具有限公司 | Casting casing machining method based on-machine measurement and application thereof |
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Application publication date: 20180615 |