CN108480912A - Welding repair method is changed in the digging of ironcasting - Google Patents
Welding repair method is changed in the digging of ironcasting Download PDFInfo
- Publication number
- CN108480912A CN108480912A CN201810547957.6A CN201810547957A CN108480912A CN 108480912 A CN108480912 A CN 108480912A CN 201810547957 A CN201810547957 A CN 201810547957A CN 108480912 A CN108480912 A CN 108480912A
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- ironcasting
- welding
- digging
- changed
- repair method
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses the diggings of ironcasting to change welding repair method, includes the following steps：(1) damaged location that ironcasting is cut off with plasma cut, selects steel plate to produce replacement insert according to the shape at removed position；(2) according to the thickness of steel plate, groove is held successfully to the ironcasting notch cut and the edge for replacing insert and is polished totally, brand-new base material is exposed；(3) it is DC reverse connection to select carbon dioxide welding machine, electric power polarity, and molten bath protective gas is 100% carbon dioxide, selects carbon dioxide flux-cored wire, carbon-dioxide arc welding is carried out under room temperature, the replacement insert is spliced in the ironcasting.Present invention process is simple and convenient to operate, be easy welding, fusion character is good, which can make iron member reusable, economize on resources, save ship repair period, the component scrapped due to corroding mildew and rot is reduced, helps shipowner to save fund, mitigates the cost of repairs of ship.
Description
Technical field
The present invention relates to Welding Repair Technology fields, and in particular to welding repair method is changed in a kind of digging of ironcasting.
Background technology
Cast iron is the iron-carbon alloy that phosphorus content is more than 2%.Due to cast iron have excellent wearability, damping property, also have can
Castability and machinability, ironcasting are widely used in the various element of installation of ship.Host is the heart of ship,
Certain parts of appliance of ship are such as various pump seats and end cap (main sea water pump, fire pump, ballast pump, jet pump, oil pump
Deng) these safeguard that the component of ship " heart " running is ironcasting.
However, the welding of ironcasting is because of the thorny problem that its characteristic is industry.The inside of cast iron is dispersed with a large amount of stones
Ink sheet, as the matrix of steel is isolated by a large amount of crackles, thus the intensity of cast iron is relatively low, and plasticity is very poor, unlike mild steel that
The deformations such as elongation, bending that sample easy tos produce under force.The elongation percentage of cast iron is equal to zero at normal temperatures, therefore,
When welding stress is more than the intensity of cast iron, the weakness along soldering area just generates to be broken or weld seam is made to be shelled along melt run suddenly
From.The characteristics of complex process, hardly possible molding, infusibility conjunction is welding cast iron.
Prior art weld cast iron generally will produce following problem：
(1) cast iron of seriously corroded will produce in welding and (can not be welded) together with base material extinction tests；
(2) easily there is spoken parts in traditional operas and hardened structure in welding point；
(3) welding point is easily cracked；
(4) there is the case where being not easy to burn-on and can not welding in the ironcasting to have gone bad.
Cast iron is damaged small component and is still repaired using manual electric arc welding, when the above-mentioned ironcasting equipment of ship is by seawater
Heavy corrosion generate large area it is mildew and rot when, any welding method all can not soldering.If cast again, the time is not only needed,
And by with original equipment build and endo conformation match the problems such as restrict；Under normal circumstances, for large area heavy corrosion
Iron member always be and scrap processing, can only in addition buy new part, the cost of repairing is higher.
Invention content
It is an object of the invention to overcome shortcoming and defect in the prior art, a kind of digging of ironcasting is provided changes welding and repair
Compound method, simple for process, easy to operate, easy welding, fusion character are good, which can make iron member reusable,
It economizes on resources, saves ship repair period, reduce the component scrapped due to corroding mildew and rot, help shipowner to save fund, mitigate ship
The cost of repairs provides convenience to repair again next time.
The present invention is achieved by the following technical solutions：
Welding repair method is changed in the digging of ironcasting, it is characterised in that includes the following steps：
(1) damaged location that ironcasting is cut off with plasma cut selects steel plate to be made according to the shape at removed position
Go out to replace insert；
(2) according to the thickness of steel plate, groove is held successfully to the ironcasting notch cut and the edge for replacing insert and is beaten
Mill is clean, exposes brand-new base material；
(3) it is DC reverse connection to select carbon dioxide welding machine, electric power polarity, and molten bath protective gas is 100% carbon dioxide, choosing
With carbon dioxide flux-cored wire, carbon-dioxide arc welding is carried out under room temperature, the replacement insert is spliced in the ironcasting.
Further, the steel plate is one kind in Q235, A plate, E plates or H plates.
Further, step (1) will first produce former shaped the ironcasting of specific shape with steel plate before cutting
Insert is replaced, then is cut with plasma, in order to avoid because error causes component inside position reason to hinder installation.
Further, the carbon dioxide flux-cored wire selects CHT711 the or CHT512 welding wires of a diameter of 1.2mm.
Further, welding current is 140-180 amperes in the step (3), and voltage is 23-29 volts, speed of welding
For 140-210 mm/mins, molten bath shield gas flow rate is 15-20 liters/min.
Further, in step (3) welding process, often weld it is a bit of gently tap weld seam with nail hammer immediately, with
Remove stress cracking.In addition, to there is heating lamp baking removal dirt in greasy dirt part just to weld.
Further, in step (3) welding process if there is crackle soldering is further continued for after then abrading crackle.
This is because the stretching action in welding process, it is possible to it can cause to crack at ironcasting welding edge, if do not abraded,
It can influence subsequent welding quality.
Further, the digging of ironcasting changes after the completion of REPAIR WELDING and is gradually cooling to room temperature with heat-preservation cotton package.
Preferably, the digging of ironcasting is changed after the completion of REPAIR WELDING, installs spelter additional on new structural member.New structure can be reduced in this way
Part improves the usage time for being repaired component by the speed of seawater corrosion.
The beneficial effects of the invention are as follows：
(1) many ironcastings of ship are all easy to be caused to go rotten by seawater corrosion, and base material ontology will appear mealy structure,
It gently taps to crush with nail hammer and be scattered, and any existing welding method can not all carry out REPAIR WELDING, it is traditional along with using
Cutting method (oxy-acetylene) can not also cut a variety of causes such as cast iron, the ironcasting of former seriously corroded can scrap processing.I
Department develops a kind of digging of the ironcasting of innovation and changes welding repair method, using plasma cut by concentrating on studies for many years
Steel plate+carbon dioxide arc welding connection is changed+spliced to digging to repair welding cast iron, and the above practice succeeds so that ironcasting is in big face
It can also be repaired in the case of long-pending corrosion and damage, the office renewed must be scrapped once large area is damaged by having broken ironcasting
Face, and the ironcasting appearance of weld after reparation is beautiful, weld seam is good with base material fusion character.
(2) it is the welding method using cold welding that welding repair method is changed in the digging of the ironcasting of the application, need not be heated pre-
Heat need not also make annealing treatment after welding, easy to operate, simple for process, energy saving, low production cost.And the reparation side
Method so that iron member is reusable, economizes on resources, and saves ship repair period, reduces the component scrapped due to corroding mildew and rot, side
It helps shipowner to save fund, mitigates the cost of repairs of ship.
(3) ironcasting for broken parts with certain radian or with specific shape, the large area of such ironcasting
Breakage, the advantage that welding repair method is changed in the digging of the ironcasting of the application are further embodied, and steel plate can be processed to have
The shape that original paper is removed position is got on by welding mounting again, can obtain the repairing effect closest to former ironcasting.
In order to better understand and implement, the present invention will be described in detail With reference to embodiment.
Specific implementation mode
Embodiment 1
Welding repair method is changed in the digging of the ironcasting of the present embodiment, includes the following steps：
(1) damaged location that ironcasting is cut off with plasma cut, is produced with steel plate according to the shape at removed position
Insert is replaced, the steel plate is Q235 plates；
(2) according to the thickness of steel plate, groove is held successfully to the ironcasting notch cut and the edge for replacing insert and is beaten
Mill is clean, exposes brand-new base material；
(3) it is DC reverse connection to select carbon dioxide welding machine, electric power polarity, and molten bath protective gas is 100% carbon dioxide, choosing
With the CHT711 carbon dioxide flux-cored wires for selecting a diameter of 1.2mm, carbon-dioxide arc welding is carried out under room temperature, by the replacement
In the ironcasting, welding current is 140 amperes for insert mounting, and voltage is 23 volts, and speed of welding is 140 mm/mins, is melted
Pond shield gas flow rate is 15 liters/min.
Embodiment 2
Welding repair method is changed in the digging of the ironcasting of the present embodiment, includes the following steps：
(1) damaged location that ironcasting is cut off with plasma cut selects steel plate to be made according to the shape at removed position
Go out and replace insert, the steel plate is A plates；
(2) according to the thickness of steel plate, groove is held successfully to the ironcasting notch cut and the edge for replacing insert and is beaten
Mill is clean, exposes brand-new base material；
(3) it is DC reverse connection to select carbon dioxide welding machine, electric power polarity, and molten bath protective gas is 100% carbon dioxide, choosing
With the CHT512 carbon dioxide flux-cored wires for selecting a diameter of 1.2mm, carbon-dioxide arc welding is carried out under room temperature, by the replacement
In the ironcasting, welding current is 160 amperes for insert mounting, and voltage is 25 volts, and speed of welding is 160 mm/mins, is melted
Pond shield gas flow rate is 18 liters/min.
(4) digging of ironcasting changes after the completion of REPAIR WELDING and is gradually cooling to room temperature with heat-preservation cotton package.
Embodiment 3
Welding repair method is changed in the digging of the ironcasting of the present embodiment, includes the following steps：
(1) damaged location that ironcasting is cut off with plasma cut selects steel plate to be made according to the shape at removed position
Go out and replace insert, the steel plate is E plates, and for the ironcasting of specific shape, first original shape is produced with steel plate before cutting
Replacement insert, then cut with plasma；
(2) according to the thickness of steel plate, groove is held successfully to the ironcasting notch cut and the edge for replacing insert and is beaten
Mill is clean, exposes brand-new base material；
(3) it is DC reverse connection to select carbon dioxide welding machine, electric power polarity, and molten bath protective gas is 100% carbon dioxide, choosing
With the CHT512 carbon dioxide flux-cored wires for selecting a diameter of 1.2mm, carbon-dioxide arc welding is carried out under room temperature, by the replacement
In the ironcasting, welding current is 180 amperes for insert mounting, and voltage is 29 volts, and speed of welding is 210 mm/mins, is melted
Pond shield gas flow rate be 20 liters/min, in welding process, often weld it is a bit of gently tap weld seam with nail hammer immediately, with clear
De-stress crackle.
(4) digging of ironcasting installs spelter additional after the completion of changing REPAIR WELDING on new structural member, is then wrapped up with heat-preservation cotton gradual
It is cooled to room temperature.
Embodiment 4
Welding repair method is changed in the digging of the ironcasting of the present embodiment, includes the following steps：
(1) damaged location that ironcasting is cut off with plasma cut selects steel plate to be made according to the shape at removed position
Go out and replace insert, the steel plate is H plates, and for the ironcasting of specific shape, first original shape is produced with steel plate before cutting
Replacement insert, then cut with plasma；
(2) according to the thickness of steel plate, groove is held successfully to the ironcasting notch cut and the edge for replacing insert and is beaten
Mill is clean, exposes brand-new base material；
(3) it is DC reverse connection to select carbon dioxide welding machine, electric power polarity, and molten bath protective gas is 100% carbon dioxide, choosing
With the CHT711 carbon dioxide flux-cored wires for selecting a diameter of 1.2mm, carbon-dioxide arc welding is carried out under room temperature, by the replacement
In the ironcasting, welding current is 150 amperes for insert mounting, and voltage is 27 volts, and speed of welding is 180 mm/mins, is melted
Pond shield gas flow rate be 16 liters/min, in welding process, often weld it is a bit of gently tap weld seam with nail hammer immediately, with clear
De-stress crackle is further continued for soldering if there is crackle after then abrading crackle.
(4) digging of ironcasting installs spelter additional after the completion of changing REPAIR WELDING on new structural member, is then wrapped up with heat-preservation cotton gradual
It is cooled to room temperature.
The invention is not limited in the above embodiments, if the various changes or deformation to the present invention do not depart from the present invention
Spirit and scope, if these changes and deformation belong within the scope of the claim and equivalent technologies of the present invention, then this hair
It is bright to be also intended to comprising these changes and deformation.
Claims (9)
1. welding repair method is changed in the digging of ironcasting, it is characterised in that include the following steps：
(1) damaged location that ironcasting is cut off with plasma cut is selected steel plate to be produced according to the shape at removed position and is replaced
Change insert；
(2) according to the thickness of steel plate, groove is held successfully to the ironcasting notch cut and the edge for replacing insert and is polished dry
Only, expose brand-new base material；
(3) it is DC reverse connection to select carbon dioxide welding machine, electric power polarity, and molten bath protective gas is 100% carbon dioxide, selects two
Carbonoxide flux-cored wire carries out carbon-dioxide arc welding under room temperature, and the replacement insert is spliced in the ironcasting.
2. welding repair method is changed in the digging of ironcasting according to claim 1, it is characterised in that：The steel plate is Q235, A
One kind in plate, E plates or H plates.
3. welding repair method is changed in the digging of ironcasting according to claim 1, it is characterised in that：Step (1) is for specific
The ironcasting of shape first will produce former shaped replacement insert with steel plate before cutting, then be cut with plasma.
4. welding repair method is changed in the digging of ironcasting according to claim 1, it is characterised in that：The carbon dioxide medicine core
Welding wire selects CHT711 the or CHT512 welding wires of a diameter of 1.2mm.
5. welding repair method is changed in the digging of ironcasting according to claim 1, it is characterised in that：Weldering in the step (3)
It is 140-180 amperes to connect electric current, and voltage is 23-29 volts, and speed of welding is 140-210 mm/mins, molten bath protective gas stream
Amount is 15-20 liters/min.
6. welding repair method is changed in the digging of ironcasting according to claim 1, it is characterised in that：Step (3) welding
In the process, often weld it is a bit of gently tap weld seam with nail hammer immediately, to remove stress cracking.
7. welding repair method is changed in the digging of ironcasting according to claim 1, it is characterised in that：Step (3) welding
In the process if there is crackle, then soldering is further continued for after abrading crackle.
8. welding repair method is changed in the digging of ironcasting according to claim 1, it is characterised in that：Welding is changed in the digging of ironcasting
After the completion of reparation room temperature is gradually cooling to heat-preservation cotton package.
9. welding repair method is changed in the digging of ironcasting according to claim 1, it is characterised in that：Welding is changed in the digging of ironcasting
After the completion of reparation, spelter is installed additional on new structural member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810547957.6A CN108480912A (en) | 2018-05-31 | 2018-05-31 | Welding repair method is changed in the digging of ironcasting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810547957.6A CN108480912A (en) | 2018-05-31 | 2018-05-31 | Welding repair method is changed in the digging of ironcasting |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109317920A (en) * | 2018-12-14 | 2019-02-12 | 徐州市华茂铸造有限公司 | A kind of breakage ironcasting restorative procedure |
| CN109676221A (en) * | 2019-01-23 | 2019-04-26 | 广州中船文冲船坞有限公司 | A kind of welding method of main engine jacket package zine plate |
| CN110091118A (en) * | 2019-04-17 | 2019-08-06 | 广州中船文冲船坞有限公司 | A kind of deformation repair method of fan blade peculiar to vessel |
| CN110142564A (en) * | 2019-05-08 | 2019-08-20 | 光大常高新环保能源(常州)有限公司 | A kind of screw conveyor method for maintaining |
| CN111451709A (en) * | 2020-03-12 | 2020-07-28 | 广州文冲船舶修造有限公司 | Digging, replacing and repairing method for condenser shell connected air bag |
| CN111545988A (en) * | 2020-03-31 | 2020-08-18 | 广州文冲船舶修造有限公司 | Repair method for prolonging service life of brake hub of marine anchor cable machine |
| CN111906493A (en) * | 2020-06-19 | 2020-11-10 | 中国华冶科工集团有限公司 | Repairing method for crane wheel crack |
| CN112139754A (en) * | 2020-09-30 | 2020-12-29 | 青义学 | Method for repairing outdoor thin-wall cast iron cultural relics |
| CN112536568A (en) * | 2019-09-20 | 2021-03-23 | 刘波 | Excavator bucket tooth repairing method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109317920A (en) * | 2018-12-14 | 2019-02-12 | 徐州市华茂铸造有限公司 | A kind of breakage ironcasting restorative procedure |
| CN109676221A (en) * | 2019-01-23 | 2019-04-26 | 广州中船文冲船坞有限公司 | A kind of welding method of main engine jacket package zine plate |
| CN110091118A (en) * | 2019-04-17 | 2019-08-06 | 广州中船文冲船坞有限公司 | A kind of deformation repair method of fan blade peculiar to vessel |
| CN110091118B (en) * | 2019-04-17 | 2020-07-28 | 广州文冲船舶修造有限公司 | Deformation repairing method for marine wind impeller |
| CN110142564A (en) * | 2019-05-08 | 2019-08-20 | 光大常高新环保能源(常州)有限公司 | A kind of screw conveyor method for maintaining |
| CN112536568A (en) * | 2019-09-20 | 2021-03-23 | 刘波 | Excavator bucket tooth repairing method |
| CN111451709A (en) * | 2020-03-12 | 2020-07-28 | 广州文冲船舶修造有限公司 | Digging, replacing and repairing method for condenser shell connected air bag |
| CN111545988A (en) * | 2020-03-31 | 2020-08-18 | 广州文冲船舶修造有限公司 | Repair method for prolonging service life of brake hub of marine anchor cable machine |
| CN111545988B (en) * | 2020-03-31 | 2021-03-16 | 广州文冲船舶修造有限公司 | Repair method for prolonging service life of brake hub of marine anchor cable machine |
| CN111906493A (en) * | 2020-06-19 | 2020-11-10 | 中国华冶科工集团有限公司 | Repairing method for crane wheel crack |
| CN112139754A (en) * | 2020-09-30 | 2020-12-29 | 青义学 | Method for repairing outdoor thin-wall cast iron cultural relics |
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