CN110508995A - The restorative procedure of ironcasting cracking - Google Patents
The restorative procedure of ironcasting cracking Download PDFInfo
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- CN110508995A CN110508995A CN201910788341.2A CN201910788341A CN110508995A CN 110508995 A CN110508995 A CN 110508995A CN 201910788341 A CN201910788341 A CN 201910788341A CN 110508995 A CN110508995 A CN 110508995A
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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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Abstract
A kind of restorative procedure of ironcasting cracking, belong to ironcasting Welding Repair Technology field, it is unable to satisfy casting for mechanical performance after solving the problems, such as ironcasting welding and integrally requires, the restorative procedure be with high-intensitive bar is set on casting of the crack weld seam at 45 degree~90 degree directions, the high intensity bar can promote the mechanical performance of commissure, to meet the needs of casting entirety.
Description
Technical field
The present invention relates to casting technology fields, the in particular to method of ironcasting reparation.
Background technique
The casting flaw of ironcasting usually has burning into sand, slag inclusion, stomata, cold shut, is not watered with, is exactly to cast there are also a kind of defect
Ironware, by the effect of external force, causes ironcasting local cracks or cracking to fall off after casting.Ironcasting is because of its metallographic structure
Particularity, defect welding after, the amalgamation of wlding and base material is poor, even if so ironcasting cracking be welded successfully after, cracking
The bearing load at position can also be greatly reduced, therefore this defect of ironcasting Chang Yinwei can be judged to useless and cannot use, and cause to produce
The significant wastage of cost.
Summary of the invention
Casting scrap problem caused by repairing is difficult in view of the above ironcasting crack or cracking welding, it is necessary to be mentioned
The restorative procedure of a kind of ironcasting cracking out, the restorative procedure in such a way that cracking position inlays high-intensitive stick class to institute
It states cracking and carries out REPAIR WELDING, having reached the casting after repairing can satisfy whole use demand.
A kind of restorative procedure of ironcasting cracking, the restorative procedure is with crack weld seam on casting into 45 degree~90 degree
Side sets up high-intensitive bar, and the high intensity bar can promote the mechanical performance of commissure, to meet casting entirety
Demand.
A kind of the step of restorative procedure of ironcasting cracking includes:
S01, the crack groove for being 60 degree~120 degree by the reconditioning of casting crack；
S02 carries out local heating to casting crack, makes 500 DEG C~600 DEG C of temperature near the groove of crack；
S03, fracture groove carry out built-up welding；
S04 keeps the temperature commissure, using thermal insulation material covering by the way of weld seam is kept the temperature, until weld seam with
Other spot temperatures of casting are identical；And welding seam grinding is extremely flushed with cast(ing) surface；
S05 integrally carries out ageing treatment to casting, to eliminate the welding interior stress of commissure；
S06, with long striped groove, the both ends of the groove are set on casting of the crack weld seam at 45 degree~90 degree directions
Equipped with end head, the Outside Dimensions of the end head are greater than the Outside Dimensions in the middle part of the groove, to play the handle of end head
The effect of holding reels effect；
S07 places high-intensitive bar identical with groove topography in the groove, and will be described by the way of welding
Groove sealing；
S08 carries out ageing treatment to casting, with the welding interior stress of removal process S07 weld seam, and repairs to weld seam
Mill；
S09 carries out PT inspection to entire casting, after confirming free from flaw and welding defect, carries out Shot Blasting to casting, complete
It is repaired at the crack of casting.
Further, groove is symmetrically located in casting crack two sides, namely the two sides to casting crack in the step S01
Edge carries out reconditioning, makes crack both sides of the edge at 60 degree~120 degree of groove.
Further, the range of local heating is crack groove at least 200mm outward in the step S02, to guarantee to weld
Connect quality；The local heating is heated using flame.
Further, built-up welding is carried out using nickel-iron electrode fracture groove in the step S03, is arranged in time in welding process
Except welding slag, tap makes seam organization consolidation in time, and weld seam is made to be higher by casting base material surface 2mm~3mm.
Further, the step S07 is specifically that the high-intensitive bar being placed in the groove is passed through welding
Mode be sealed in casting, to play the role of reeling on 45 degree~90 degree directions of weld seam, promoted at casting crack
Mechanical performance.Specifically the groove is welded using nickel-iron electrode, excludes welding slag in welding process in time, is tapped in time
Make seam organization consolidation, and weld seam is made to be higher by casting base material 2mm~3mm.
Technical solution of the present invention the utility model has the advantages that high-strength at 90 degree by being set to weld seam in the commissure where crack
The mode for spending stick class, improves the mechanical performance of commissure, so that casting can satisfy use demand.
Detailed description of the invention
Fig. 1 is casting crack schematic diagram；
Fig. 2 is provided with the weld seam schematic diagram of high-intensitive bar；
In figure, 1- casting；The crack 2-；3- high intensity bar.
Specific embodiment
In order to illustrate more clearly of technical solution of the present invention, will be described in detail according to figure embodiment, it is aobvious and easy
Insight, drawings in the following description are some embodiments of the invention, for those of ordinary skill in the art, is not paying
Under the premise of creative work, other structure types or combination can also be obtained according to these attached drawings.
For casting crack shown in FIG. 1, repaired using crack restorative procedure of the present invention, as shown in Figure 2.
It is described in detail below.
A kind of reparation of staged casting cracking defect at ladder as shown in Figure 1, specifically repairs step are as follows:
S101 is checked using PT, crack all on casting shown in Fig. 1 is found, and marked accordingly, after facilitating
It is continuous to repair, it prevents from omitting crack；
The both sides of the edge reconditioning in crack is the groove that angle is 60 degree~120 degree by S102, to facilitate the attached of welding wlding
；
S103 is heated the crack using flame, makes casting of the crack groove periphery outward within the scope of at least 200mm
Temperature is maintained at 500 DEG C~600 DEG C, to meet the needs of welding, avoids welding fusion bad；Preheat the model of crack periphery casting
Enclose do not answer yet it is excessive, to reduce welding energy consumption；
S104 carries out built-up welding, In using nickel-iron electrode fracture groove after casting crack is preheated to and meets welding requirements
Welding slag should be excluded in time in welding process and is tapped in time, to guarantee cleaning and the consolidation of seam organization, to guarantee weld seam
Welding quality；And weld seam should be higher by casting base material surface 2mm~3mm and avoid weld defect to facilitate the reconditioning of subsequent weld；
S105, using thermal insulation material by the weld seam covering and heat insulating, until the temperature of weld seam and other non-heating parts of casting
Split-phase is same, namely the temperature of weld seam is allowed to be down to room temperature；Reconditioning is carried out to weld seam afterwards, flushes the height of weld seam with cast(ing) surface；
S106, after being welded to all cracking positions on casting, the first time of the casting after carrying out cleft weld
Ageing treatment, it is therefore an objective to eliminate the internal stress of weld seam welding；
S107, the commissure after soldering are arranged along with the crack weld seam at 45 degree~90 degree in cast(ing) surface
Groove, the groove both ends are equipped with end head, and the cross section of the end head is set as semicircle, and the middle part of the groove is straight
Section, and the cross sectional dimensions of the end head is greater than the cross sectional dimensions in the middle part of groove；
The consistent high-intensitive bar of outer shape and the groove is placed in the groove, and is welded using ferronickel by S108
Item seals the groove, so that the high-intensitive bar be enclosed in the groove, also encloses the high-intensitive bar
In casting；Wherein, the height for sealing the weld seam of the groove also should be higher than that cast(ing) surface 2mm~3mm, to facilitate subsequent reconditioning；
The high-intensitive bar with end head, which is realized, reels function to weld seam, to improve the machine of weld seam at casting cracking
Tool performance；
S109 carries out second of ageing treatment to the casting of enclosed high-intensitive bar, to eliminate the weld seam of sealed groove
Internal stress, and reconditioning is carried out to the weld seam of the sealed groove；
S110, to entire casting carry out PT inspection, it is ensured that without cracking, welding defect the problems such as after, to casting carry out ball blast
Processing, completes entire repair process.
Above embodiments are only the descriptions to a kind of typical case of technical solution of the present invention, it is reasonable, do not need to pay
Out on the basis of creative work, can also reasonably it be expanded.
Claims (8)
1. a kind of restorative procedure of ironcasting cracking, which is characterized in that the restorative procedure be on casting with crack weld seam at
45 degree~90 degree sides set up high-intensitive bar.
2. the restorative procedure of ironcasting cracking as described in claim 1, which is characterized in that the restorative procedure includes following step
It is rapid:
The crack groove for being 60 degree~120 degree by the reconditioning of casting crack；
Local heating is carried out to casting crack, makes 500 DEG C~600 DEG C of temperature near the groove of crack；
Fracture groove carries out built-up welding；
With long striped groove is set on casting of the crack weld seam at 45 degree~90 degree directions, the both ends of the groove are equipped with end
Portion；
High-intensitive bar identical with groove topography is placed in the groove, and by the way of welding that the groove is close
Envelope.
3. the restorative procedure of ironcasting cracking as described in claim 1, which is characterized in that the restorative procedure includes following step
It is rapid:
S01, the crack groove for being 60 degree~120 degree by the reconditioning of casting crack；
S02 carries out local heating to casting crack, makes 500 DEG C~600 DEG C of temperature near the groove of crack；
S03, fracture groove carry out built-up welding；
S04 keeps the temperature commissure, is kept the temperature by the way of thermal insulation material covering to weld seam, until weld seam and casting
Other spot temperatures are identical；And welding seam grinding is extremely flushed with cast(ing) surface；
S05 integrally carries out ageing treatment to casting, to eliminate the welding interior stress of commissure；
S06, with long striped groove is set on casting of the crack weld seam at 45 degree~90 degree directions, the both ends of the groove are equipped with
End head, the Outside Dimensions of the end head are greater than the Outside Dimensions in the middle part of the groove, so that the holding for playing end head is made
With or reel effect；
S07 places high-intensitive bar identical with groove topography in the groove, and by the groove by the way of welding
Sealing；
S08 carries out ageing treatment to casting, with the welding interior stress of removal process S07 weld seam, and carries out reconditioning to weld seam；
S09 carries out PT inspection to entire casting, after confirming free from flaw and welding defect, carries out Shot Blasting to casting, completes casting
It repairs in the crack of part.
4. the restorative procedure of ironcasting cracking as claimed in claim 3, which is characterized in that the equal reconditioning in crack both sides of the edge is 60
The groove of~120 degree of degree.
5. the restorative procedure of ironcasting cracking as claimed in claim 3, which is characterized in that the range of the local heating is to split
Stitch groove at least 200mm outward.
6. the restorative procedure of ironcasting cracking as claimed in claim 3, which is characterized in that the local heating is added using flame
Heat.
7. the restorative procedure of ironcasting cracking as claimed in claim 3, which is characterized in that the built-up welding uses nickel-iron electrode,
Weld seam is higher by casting base material surface 2mm~3mm.
8. the restorative procedure of ironcasting cracking as claimed in claim 3, which is characterized in that the step S07 is specifically to cast
Part surface is along, at 45 degree~90 degree setting grooves, the groove both ends are equipped with end head, the end head with the crack weld seam
Cross section be set as semicircle, the middle part of the groove is straight section, and the cross sectional dimensions of the end head is greater than in groove
The cross sectional dimensions in portion；The consistent high-intensitive bar of outer shape and the groove is placed in the groove, and uses ferronickel
Welding rod seals the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910788341.2A CN110508995A (en) | 2019-08-26 | 2019-08-26 | The restorative procedure of ironcasting cracking |
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| CN201910788341.2A CN110508995A (en) | 2019-08-26 | 2019-08-26 | The restorative procedure of ironcasting cracking |
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| CN108161333A (en) * | 2017-12-29 | 2018-06-15 | 马钢(集团)控股有限公司 | A kind of welding repair method of Dump Truck Frame |
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2019
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| US5771557A (en) * | 1996-11-21 | 1998-06-30 | Contrasto; Sam | Concrete internal metal stitching |
| US20070050963A1 (en) * | 2005-08-24 | 2007-03-08 | Keller Jeffrey S | Method for repairing structural cracks |
| CN105195964A (en) * | 2015-10-24 | 2015-12-30 | 车晋绥 | On-site repair method for twist-off hollow long shaft |
| CN206283388U (en) * | 2016-12-23 | 2017-06-27 | 鞍钢电气有限责任公司 | A kind of device for repairing short-circuited conducting sleeve fracture |
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| CN107855725A (en) * | 2017-10-31 | 2018-03-30 | 徐家成 | The repair method of cast iron end-sealing die |
| CN207702515U (en) * | 2017-11-23 | 2018-08-07 | 深圳大唐宝昌燃气发电有限公司 | A kind of waste heat boiler furnace wall crack forming mechanism structure |
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Application publication date: 20191129 |