CN105252202B - A kind of repair welding repair method of the ring flange class casting crack defect of sheet with rib - Google Patents
A kind of repair welding repair method of the ring flange class casting crack defect of sheet with rib Download PDFInfo
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- CN105252202B CN105252202B CN201510614630.2A CN201510614630A CN105252202B CN 105252202 B CN105252202 B CN 105252202B CN 201510614630 A CN201510614630 A CN 201510614630A CN 105252202 B CN105252202 B CN 105252202B
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- ring flange
- gouge
- defect
- casting
- welding
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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
Abstract
The present invention relates to a kind of repair welding repair method of the ring flange class casting crack defect of sheet with rib in cast steel part defect recovery technique field, successively including following process：A some reinforcement lacing wires firmly) are welded respectively at the ring flange back side, and reinforcement lacing wire is intersected with ring flange rift direction；B the casting that lacing wire is strengthened in welding) is moved entirely into heat-treatment furnace to be heat-treated；C) excision casting running channel, rising head class long position；D gouge first) is carried out from flange panel surface along crack defect position, at depth direction gouge to the close gusset in the ring flange back side of fracture, and keeps gouge smooth cut, nothing to be mingled with；E) gouge position first is preheated and defect repair welding；F) casting is entered to heat-treatment furnace again and carries out post weld heat treatment；G）Along the secondary gouge in the back side at ring flange gouge position first, the crack defect on the ring flange back side and gusset is excluded, lacing wire, H are strengthened while removing）The position of secondary gouge is preheated, defect repair welding and post weld heat treatment.
Description
Technical field
The present invention relates to cast steel part defect recovery technique field, the ring flange class casting crack of more particularly to a kind of sheet with rib
The repair welding repair method of defect.
Background technology
Shape and structure complexity in steel-casting is various, and wherein flange circle plate casting is exactly one of them, for large-scale wall
The even ring flange class casting of thickness ununiformity, to improve the intensity of casting, if often setting arterial highway stiffener plate at the ring flange back side.It is this kind of
Steel-casting, because size is larger, the inhomogeneities of wall thickness often produces various casting flaws.Wherein, gusset and ring flange connect
Contact portion bit comparison is weak, and splitting through whole gusset and flange thickness direction occurs in product during shake out after being poured
Line defect, as depicted in figs. 1 and 2 crackle 1 and crack site 2.This crack like defect can cause casting gusset to be broken, and make gusset
Booster action fails.If processing is bad, easily cause product gross distortion, cause excessive, the wlding waste of number of rewelding etc. existing
As the serious casting that even occurs is scrapped.
The conventional bonding technique of such casting defect is all to excavate to be welded again after crack defect, in actual production,
This faults repair method easily causes the gross distortion of casting flange, or even casting to be scrapped, this solder yield less than
50%.Meanwhile, all excavate and carry out welding after crack defect again and cause that welding difficulty is high, workload increase, be unfavorable for saving production
Cost and shortening production cycle.
The content of the invention
The present invention is for there is provided one the problem of ring flange class casting crack defect repair welding process method is present in the prior art
The repair welding repair method of the ring flange class casting crack defect of sheet with rib is planted, to reduce the deformation of defect repair welding, repair welding is improved and repaiies
Multiple qualification rate.
The object of the present invention is achieved like this, a kind of repair welding side of reprocessing of the ring flange class casting crack defect of sheet with rib
Method, successively including following process：
A) lacing wire is strengthened in welding：Some reinforcement lacing wires are firmly welded respectively at the ring flange back side, and make reinforcement lacing wire and method
Blue disk rift direction intersects；B the casting that lacing wire is strengthened in welding) is moved entirely into heat-treatment furnace to be heat-treated；C) excision casting
Part running channel, rising head class long position；D gouge first) is carried out from flange panel surface along crack defect position, to the depth side of fracture
At gouge to the close gusset in the ring flange back side, and gouge smooth cut, nothing is kept to be mingled with；E) gouge position first is carried out pre-
Heat and defect repair welding；F) casting is entered to heat-treatment furnace again and carries out post weld heat treatment；G）Along the back of the body at ring flange gouge position first
The secondary gouge in face, excludes the crack defect on the ring flange back side and gusset, and lacing wire is strengthened while removing；H）To the portion of secondary gouge
Position is preheated, defect repair welding and post weld heat treatment.
In the crack defect repair welding repair method of the present invention, two secondary clearing gouges are used for through property crack defect, point
Layer repair welding, and before to the crack defect of the big plane of ring flange first gouge, to prevent from deforming during repair welding after gouge, back to
Lacing wire is strengthened in the direction welding of gouge first, can improve the intensity of casting, ring flange casting deformation when preventing gouge and repair welding,
Improve repair welding of casting and reprocess quality, and reduce the workload of follow-up shaping；Casting is after gouge repair welding first, the gouge excision back of the body
The reinforcement lacing wire in face and remaining defect carry out repair welding and reprocessed again.Therefore, flange circle plate casting is directed to by the method for the present invention
Penetrating crack defect, it is possible to achieve the gouge repair welding reclamation work without deformation, improve casting reprocesses quality, reduces follow-up
Re-shaping exercise amount, raising reprocesses efficiency, and cost is reprocessed in reduction.
Further to improve the fastness for strengthening lacing wire, the A of the inventive method) in step, the reinforcement lacing wire is respectively welded
The ring flange back side gusset and ring flange junction both sides.
Further to improve the weld strength for strengthening lacing wire, the A of the inventive method) in step, the ring flange back side is strengthened
Polishing impurity elimination processing is carried out before the welding position surface weldering of lacing wire, then again to being preheated around welding position using natural gas flame
Processing, is welded when preheating temperature reaches 150 DEG C -350 DEG C.
To make reinforcement lacing wire and casting that there is corresponding mechanical performance, the A of the inventive method) in step, the reinforcement lacing wire
To be formed with ring flange casting with the discarded panel cutting polishing that stove is poured into a mould.
To ensure thoroughly to remove defect, the step D) in gouge recess first after gouge width for depth 1-
1.3 again.
To be further ensured that defect repair welding quality, the E）And H）The preheated zone for walking defect repair welding is gouge position and outer
The region in the range of 100-120mm is enclosed, the temperature of preheating is 150 DEG C-350 DEG C, and is terminated until being preheating to defect repair welding
Enter before heat-treatment furnace.
Brief description of the drawings
Fig. 1 is the penetrating crack defect schematic diagram of flange circle plate casting.
Fig. 2 is that Fig. 1 is overturn to the schematic diagram at the ring flange back side.
Fig. 3 is the welding schematic diagram for strengthening lacing wire.
Fig. 4 is the schematic diagram after casting first gouge.
The ring flange back side is strengthened carrying out polishing impurity elimination processing before the welding position surface weldering of lacing wire, then again to welding
Natural gas flame the pre-heat treatment is used around position, is welded when preheating temperature is kept for 150 DEG C -350 DEG C.
Embodiment
As shown in Figure 3 and Figure 4, the repair welding repair method of the flange circle plate casting fracture of sheet with rib of the invention, is wrapped successively
Include following process：
A) lacing wire is strengthened in welding：As shown in figure 3, according to the position of the penetrating crack defect on ring flange casting, in method
Some reinforcement lacing wires 4 are firmly welded in the both sides of blue disk back side gusset 3 and ring flange junction respectively, make intensity strengthen lacing wire 4 with
The direction of crackle 2 intersects on ring flange；To ensure the fastness of welding, before welding, the weld part of lacing wire 4 is strengthened at the ring flange back side
Polishing impurity elimination processing is carried out before the weldering of position surface, and the pre-heat treatment is carried out using natural gas flame around welding position, in preheating
Temperature is welded when reaching 150 DEG C -350 DEG C；B the casting that lacing wire 4 is strengthened in welding) is moved entirely into heat-treatment furnace and carries out heat
Processing, makes the even tissue of casting and welding position refine, eliminate the casting stress and welding stress of cast-internal, after reduction
The stress deformation of continuous treatment process；C) the long position such as running channel, rising head of excision cast(ing) surface；D) split from flange panel surface edge
The direction of line carries out gouge first, at crack depth direction gouge to the close gusset in the ring flange back side, to ensure thoroughly to remove
Defect, the width of gouge recess 5 is 1-1.3 times of depth, and keeps gouge smooth cut, without being mingled with, as shown in figure 4, first
After gouge, the crack defect at ring flange position is excluded substantially, and forms gouge recess 5, this gouge recess 5 formation ring flange
The weak part of structure, and just reinforcement this weak part for the reinforcement lacing wire 4 being staggered, prevent follow-up welding deformation； E)
Gouge position first is preheated and defect repair welding；For improve welding quality, preheated zone be gouge position and periphery 100-
Region in the range of 120mm, when preheating temperature reaches 150 DEG C -350 DEG C, proceeds by defect repair welding, and the pre-heat treatment
Until defect repair welding terminates into before heat-treatment furnace；F) casting is entered to heat-treatment furnace again and carries out post weld heat treatment, to remove weldering
Scoop out the tissue around power, and uniform welding；G）Along the secondary gouge in the back side at ring flange gouge position first, the ring flange back of the body is excluded
Crack defect on face and gusset 3, lacing wire 4 is strengthened while removing；H）The position of secondary gouge is preheated, defect repair welding and
Post weld heat treatment, is similarly the pre- thermal mass of guarantee, and preheated zone is the region in the range of 100-120mm of gouge position and periphery,
When preheating temperature reaches 150 DEG C -350 DEG C, defect repair welding is proceeded by, and preheat until defect repair welding terminates into Re Chu
Before reason stove.
In the crack defect repair welding repair method of the present invention, two secondary clearing gouges are used for through property crack defect, point
Layer repair welding, and before to the penetrating crack of the big plane of ring flange first gouge, to prevent gouge and repair welding from deforming, back to
Lacing wire is strengthened in the direction welding of gouge first, can improve the intensity of casting, ring flange casting deformation when preventing gouge and repair welding,
Improve repair welding of casting and reprocess quality, and reduce the workload of follow-up shaping；Casting is after gouge repair welding first, the gouge excision back of the body
The reinforcement lacing wire 4 in face and remaining defect carry out repair welding and reprocessed again.Therefore, flange circle plate casting is directed to by the method for the present invention
Penetrating crack defect, it is possible to achieve the gouge repair welding reclamation work without deformation, improve casting reprocesses quality, reduces follow-up
Re-shaping exercise amount, raising reprocesses efficiency, and cost is reprocessed in reduction.
Claims (6)
1. the repair welding repair method of the ring flange class casting crack defect of a kind of sheet with rib, it is characterised in that successively including as follows
Process：
A) lacing wire is strengthened in welding：Some reinforcement lacing wires are firmly welded respectively at the ring flange back side, and make reinforcement lacing wire and ring flange
Rift direction intersects；B the casting that lacing wire is strengthened in welding) is moved entirely into heat-treatment furnace to be heat-treated；C) excision casting is poured
Road, rising head class long position；D gouge first) is carried out from flange panel surface along crack defect position, to the depth direction gas of fracture
Dig to the ring flange back side at gusset, and keep gouge smooth cut, nothing to be mingled with；E) to gouge position first carry out preheating and
Defect repair welding；F) casting is entered to heat-treatment furnace again and carries out post weld heat treatment；G）Along the back side two at ring flange gouge position first
Secondary gouge, excludes the crack defect on the ring flange back side and gusset, and lacing wire, H are strengthened while removing）The position of secondary gouge is entered
Row preheating, defect repair welding and post weld heat treatment.
2. the repair welding repair method of the ring flange class casting crack defect of sheet with rib according to claim 1, its feature exists
In A) in step, it is described to strengthen the both sides that lacing wire is respectively welded at the gusset at the ring flange back side and the junction of ring flange.
3. the repair welding repair method of the ring flange class casting crack defect of sheet with rib according to claim 2, its feature exists
In the ring flange back side is strengthened carrying out polishing impurity elimination processing before the welding position surface weldering of lacing wire, then again to welding position
Surrounding uses natural gas flame the pre-heat treatment, is welded when preheating temperature reaches 150 DEG C -350 DEG C.
4. the repair welding repair method of the ring flange class casting crack defect of sheet with rib according to claim 1, its feature exists
In A) in step, it is described that to strengthen lacing wire be to polish to form with the discarded panel cutting that stove pour into a mould with ring flange casting.
5. the repair welding repair method of the ring flange class casting crack defect according to the sheet with rib described in claim 1, it is characterised in that
The D) width of gouge recess in step first after gouge is 1-1.3 times of depth.
6. the repair welding repair method of the ring flange class casting crack defect of the sheet with rib described in claim 1, it is characterised in that institute
State E）And H）It is the region in the range of 100-120mm of gouge position and periphery, the temperature of preheating to walk the preheated zone of defect repair welding
For 150 DEG C -350 DEG C, and terminate until being preheating to defect repair welding into before heat-treatment furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510614630.2A CN105252202B (en) | 2015-09-24 | 2015-09-24 | A kind of repair welding repair method of the ring flange class casting crack defect of sheet with rib |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510614630.2A CN105252202B (en) | 2015-09-24 | 2015-09-24 | A kind of repair welding repair method of the ring flange class casting crack defect of sheet with rib |
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| CN105252202A CN105252202A (en) | 2016-01-20 |
| CN105252202B true CN105252202B (en) | 2017-10-31 |
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| CN111266700B (en) * | 2020-03-30 | 2023-09-26 | 安徽马钢设备检修有限公司 | Welding device and repairing process for heat-resistant steel base of slow-cooling wheel |
| CN115319326B (en) * | 2022-09-13 | 2024-04-16 | 上海外高桥造船有限公司 | Crack repairing method |
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| US6394750B1 (en) * | 2000-04-03 | 2002-05-28 | United Technologies Corporation | Method and detail for processing a stator vane |
| JP2002144079A (en) * | 2000-11-10 | 2002-05-21 | Hitachi Ltd | Repairing method of heat resistant member and repairing method of gas turbine |
| CN100484690C (en) * | 2006-11-17 | 2009-05-06 | 长春安信电力科技有限公司 | Method for changing blade in machine for large-scale boiler draught fan |
| CN101053926A (en) * | 2007-05-31 | 2007-10-17 | 四川东风电机厂有限公司 | Axial-flow rotary propeller type water turbine runner blade crackle treating method |
| CN101979206B (en) * | 2010-11-30 | 2015-04-22 | 惠生（南通）重工有限公司 | Process for welding super-thick low-alloy high-strength plates |
| CN102744553A (en) * | 2012-07-17 | 2012-10-24 | 上海中油天宝巴圣钢管有限公司 | Repair method for transversal cracks of welding seams of thick-wall submerged arc welded pipe |
| CN103192223A (en) * | 2013-03-29 | 2013-07-10 | 中国十七冶集团有限公司 | Method for processing welding heat affected zone cracks of plates of moderate thicknesses |
| CN103439409B (en) * | 2013-09-03 | 2016-01-27 | 宁夏共享集团有限责任公司 | A kind of localization method of large wall thickness pipe fitting groove weld defect |
| CN104439876A (en) * | 2014-09-29 | 2015-03-25 | 宁夏共享铸钢有限公司 | Method for repairing defects of pipe orifice of high-alloy hollow valve shell casting |
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