CN105855788A - Welding process for repairing crack of ball milling iron casting - Google Patents
Welding process for repairing crack of ball milling iron casting Download PDFInfo
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- CN105855788A CN105855788A CN201610385518.0A CN201610385518A CN105855788A CN 105855788 A CN105855788 A CN 105855788A CN 201610385518 A CN201610385518 A CN 201610385518A CN 105855788 A CN105855788 A CN 105855788A
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- welding
- crack
- repairing
- hypotenuse
- polishing
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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
- B23P6/04—Repairing fractures or cracked metal parts or products, e.g. castings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention relates to a welding process for repairing a crack of a ball milling iron casting. The welding process comprises the following steps of: (1) cutting a U-shaped welding bevel edge along the crack, carburizing the inner surface of the bevel edge, polishing and cleaning a sulfide layer, and re-polishing the bottom of the bevel edge to form a counter-arched shape; (2) pre-burying a bolt at the bottom of the U-shaped welding bevel edge; (3) carrying out intermittent surfacing to fill in the crack with a welding material selected from a dissimilar welding metal E5016 welding rod and welding using a manual electrode arc cold welding method of the dissimilar welding metal; and (4) polishing the surface of a welding bead to be flat. The welding process is applied to repairing an iron casting spare part, cracking cannot occur easily, and the service life of the original spare part is effectively prolonged.
Description
Technical field
The invention belongs to welding technology field, particularly relate to a kind of welding procedure repairing nodular cast iron part crackle.
Background technology
Pyrogenic process Copper making casting copper anode plate generally uses self-control copper mold, the casting die used during tradition casting copper mold is nodular cast iron material, a complete set of mold spare part is at 22.6 ten thousand yuan/set, master mold base plate expense is 10.5 ten thousand yuan/block, 1200 DEG C of copper liquid have been refined utilizing anode furnace, during casting copper mold, because of nodular cast iron material and architectural difference, under rapid heat cycle state, master mold base plate, circumferential side frame, upper cover plate is easily generated irregular cracks and scaling loss, the most frequently cast copper mould operation, expanded by heating and cold events principle effect, nodular cast iron crystal structure morphs, cause crack, sulfuration, carburizing, to the spare part repairing and reusing of nodular cast iron material, bring challenge.
The reparation of existing nodular cast iron material mould, is to use grey cast-iron half thermal weld technique, carries out repairing nodular cast iron material spare part, and operating procedure is: (1) cut；(2) reject and ooze copper and sulphide layer；(3) polish solder side；(4) preheat weld bond；(5) with 506 welding rod continuous built-up welding filling-in cracks；(6) weldering meat surface polishes flat.When built-up welding, homogeneity weld seam and incomplete fusion zone are easily formed spoken parts in traditional operas, austenite region is more easy to martensitic structure occur, it is easily formed cold crack under welding action of pulling stress, there is weldering meat not fuse with former spheroidal graphite cast-iron and be layered formation crack simultaneously, have a strong impact on nodular cast iron material spare part, the service life after reparation.
Summary of the invention
The present invention is directed to the problem that prior art exists, it is provided that a kind of welding procedure repairing nodular cast iron part crackle.
The present invention adopts the following technical scheme that:
A kind of welding procedure repairing nodular cast iron part crackle, it is characterised in that described technique includes:
(1) output hypotenuse U-shaped bevel for welding along crackle cutting, then hypotenuse groove inner surface carburizing, sulfuric horizon polishing are cleaned out, antiarch shape will be ground to bottom groove again；
(2) pre-buried many bolts bottom hypotenuse U-shaped bevel for welding；
(3) heterogeneous sea welding metal E5016 welding rod interval built-up welding filling-in crack selected by welding material, uses the stick electrode arc cold-welding method of heterogeneous sea welding metal during welding；
(4) weldering meat surface polishes flat.
According to above-mentioned welding procedure, it is characterised in that the surface area sum of described many bolts accounts for groove open surface area no less than 30%.
According to above-mentioned welding procedure, it is characterised in that described bolt is M14 high-strength bolt.
Beneficial effects of the present invention: this welding procedure is applied to after Nodular cast iron material spare part is repaired the most easy to crack, there is implementing process simplify, easy to operate, time saving and energy saving, maintenance is efficiently, former spare part service life can be effectively improved, alleviate post operation personnel and overhaul the labour intensity of spheroidal graphite cast-iron spare part, reduce nonferrous metallurgy and produce the consumption of spare part expense.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Detailed description of the invention
Seeing Fig. 1, the welding procedure repairing nodular cast iron part crackle of the present invention includes:
(1) output hypotenuse U-shaped bevel for welding with CUT along crack cutting, then with electric angle grinder, hypotenuse groove inner surface carburizing, sulfuric horizon are thoroughly polished and cleaned out, antiarch shape will be ground to bottom groove again.
(2) bottom hypotenuse U-shaped groove, use alloy bit boring, tapping, pre-buried many high-strength bolts (such as M14 high-strength bolt), the surface area sum of many bolts accounts for groove open surface area no less than 30%, the quantity of practical proof pre-embedded bolt not can exceed that 30%, otherwise weldering flesh noodles is long-pending diminishes, and affects its weld seam fusion amount and weld strength.Selecting studding weldering purpose is to take root with mother metal for weldering meat, strengthens heterogeneous carbon steel weldering meat intensity and plasticity, improves this district and bear the ability of Thermal Stress, stop the generation of cold crack.
(3) heterogeneous sea welding metal E5016 welding rod interval built-up welding filling-in crack selected by welding material, uses the stick electrode arc cold-welding method of heterogeneous sea welding metal during welding；
(4) weldering meat surface polishes flat.
By welding rod through 120～250 DEG C of drying before welding, put into heat-preserving container ready access upon use, during welding operation, suitable minimum welding current is selected to control, weld seam is with mother metal fusion preferably, reduce C, S, the objectionable impurities amounts such as P, reduce mother metal proportion in weld seam, reduce tendency of hardenability, first use very fast speed of welding and short arc welding bonding layer, linear arc manipulation is used during welding, do not swing, force down electric arc at the uniform velocity to weld, keep welding bead width consistent, weldering meat combines implements short-track weldering, discontinuous welding, dispersion weldering, utilize weld seam temperature high plasticity, with ball hammer hammering weld seam, weld metal is made to be plastically deformed, reduce weld stress, suppression weld seam cracks.
Claims (3)
1. the welding procedure repairing nodular cast iron part crackle, it is characterised in that described technique includes:
(1) output hypotenuse U-shaped bevel for welding along crackle cutting, then hypotenuse groove inner surface carburizing, sulfuric horizon polishing are cleaned out, antiarch shape will be ground to bottom groove again；
(2) pre-buried many bolts bottom hypotenuse U-shaped bevel for welding；
(3) heterogeneous sea welding metal E5016 welding rod interval built-up welding filling-in crack selected by welding material, uses the stick electrode arc cold-welding method of heterogeneous sea welding metal during welding；
(4) weldering meat surface polishes flat.
Welding procedure the most according to claim 1, it is characterised in that the surface area sum of described many bolts accounts for the 30% of groove open surface area.
Welding procedure the most according to claim 1, it is characterised in that described bolt is M14 high-strength bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610385518.0A CN105855788A (en) | 2016-06-03 | 2016-06-03 | Welding process for repairing crack of ball milling iron casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610385518.0A CN105855788A (en) | 2016-06-03 | 2016-06-03 | Welding process for repairing crack of ball milling iron casting |
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| CN105855788A true CN105855788A (en) | 2016-08-17 |
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| CN201610385518.0A Pending CN105855788A (en) | 2016-06-03 | 2016-06-03 | Welding process for repairing crack of ball milling iron casting |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735907A (en) * | 2017-01-05 | 2017-05-31 | 机械科学研究总院青岛分院 | A kind of laser butt-weld in the downhand position method of generous stainless steel plate |
| CN109500477A (en) * | 2018-11-21 | 2019-03-22 | 中船海洋动力部件有限公司 | A kind of repairing method with welding suitable for spheroidal graphite cast-iron |
| CN109551167A (en) * | 2018-11-26 | 2019-04-02 | 阳泉煤业集团华越机械有限公司煤机装备研究院 | A kind tooth reproduces gear restorative procedure |
| CN111843101A (en) * | 2020-06-30 | 2020-10-30 | 金川集团股份有限公司 | Method for repairing and welding copper mold bottom plate made of nodular cast iron |
| CN112440076A (en) * | 2019-08-29 | 2021-03-05 | 招远市金亭岭矿业有限公司 | Method for repairing end cover of ball mill |
| CN112475531A (en) * | 2020-11-23 | 2021-03-12 | 西安热工研究院有限公司 | Welding repair method for nodular cast iron main frame of wind turbine generator |
| CN113084448A (en) * | 2021-04-15 | 2021-07-09 | 中铁十一局集团第三工程有限公司 | Rapid repairing method for rocket sled sliding rail fastener |
| CN113172361A (en) * | 2021-05-12 | 2021-07-27 | 远景能源有限公司 | Method and system for welding and repairing hub of wind generating set |
| CN115138951A (en) * | 2022-08-01 | 2022-10-04 | 南京钢铁股份有限公司 | Online repairing method for cracking of large hydraulic cylinder |
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| US4068111A (en) * | 1975-08-20 | 1978-01-10 | De Rotterdamsche Droogdok Maatschappij B.V. | Process of working imperfections or defects on generally thickwalled metal worked-pieces |
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| CN201783765U (en) * | 2010-08-05 | 2011-04-06 | 中建钢构江苏有限公司 | Thick plate embedded part with reinforcing bar penetrating through inner grooves |
| CN105414708A (en) * | 2015-12-15 | 2016-03-23 | 含山县大力精密机械有限公司 | Welding repair method for gray cast iron |
| CN105414709A (en) * | 2015-12-15 | 2016-03-23 | 含山县大力精密机械有限公司 | Welding repair method for large nodular iron castings |
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2016
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4068111A (en) * | 1975-08-20 | 1978-01-10 | De Rotterdamsche Droogdok Maatschappij B.V. | Process of working imperfections or defects on generally thickwalled metal worked-pieces |
| CN1160618A (en) * | 1996-03-21 | 1997-10-01 | 陈友兰 | Repair method and welding wire for repairing defect on the machined plane of iron casting |
| CN201783765U (en) * | 2010-08-05 | 2011-04-06 | 中建钢构江苏有限公司 | Thick plate embedded part with reinforcing bar penetrating through inner grooves |
| CN101972882A (en) * | 2010-11-08 | 2011-02-16 | 常熟市普利擎汽车维修保养有限公司 | Carbon-dioxide arc welding process of automotive iron casting |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735907A (en) * | 2017-01-05 | 2017-05-31 | 机械科学研究总院青岛分院 | A kind of laser butt-weld in the downhand position method of generous stainless steel plate |
| CN109500477A (en) * | 2018-11-21 | 2019-03-22 | 中船海洋动力部件有限公司 | A kind of repairing method with welding suitable for spheroidal graphite cast-iron |
| CN109551167A (en) * | 2018-11-26 | 2019-04-02 | 阳泉煤业集团华越机械有限公司煤机装备研究院 | A kind tooth reproduces gear restorative procedure |
| CN112440076A (en) * | 2019-08-29 | 2021-03-05 | 招远市金亭岭矿业有限公司 | Method for repairing end cover of ball mill |
| CN111843101A (en) * | 2020-06-30 | 2020-10-30 | 金川集团股份有限公司 | Method for repairing and welding copper mold bottom plate made of nodular cast iron |
| CN112475531A (en) * | 2020-11-23 | 2021-03-12 | 西安热工研究院有限公司 | Welding repair method for nodular cast iron main frame of wind turbine generator |
| CN113084448A (en) * | 2021-04-15 | 2021-07-09 | 中铁十一局集团第三工程有限公司 | Rapid repairing method for rocket sled sliding rail fastener |
| CN113084448B (en) * | 2021-04-15 | 2023-02-24 | 中铁十一局集团第三工程有限公司 | Rapid repairing method for rocket sled sliding rail fastener |
| CN113172361A (en) * | 2021-05-12 | 2021-07-27 | 远景能源有限公司 | Method and system for welding and repairing hub of wind generating set |
| CN113172361B (en) * | 2021-05-12 | 2022-09-23 | 远景能源有限公司 | Method and system for welding and repairing hub of wind generating set |
| CN115138951A (en) * | 2022-08-01 | 2022-10-04 | 南京钢铁股份有限公司 | Online repairing method for cracking of large hydraulic cylinder |
| CN115138951B (en) * | 2022-08-01 | 2023-12-15 | 南京钢铁股份有限公司 | Online repairing method for large hydraulic cylinder cracks |
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Application publication date: 20160817 |