CN105618713B - A kind of welding agent, mould, the method using welding agent or mold repair - Google Patents
A kind of welding agent, mould, the method using welding agent or mold repair Download PDFInfo
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- CN105618713B CN105618713B CN201610125506.4A CN201610125506A CN105618713B CN 105618713 B CN105618713 B CN 105618713B CN 201610125506 A CN201610125506 A CN 201610125506A CN 105618713 B CN105618713 B CN 105618713B
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- powder
- air channel
- secondary air
- welding agent
- power plant
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/10—Repairing defective or damaged objects by metal casting procedures
-
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
- B23K35/286—Al as the principal constituent
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Ceramic Products (AREA)
Abstract
The present invention relates to a kind of welding agent for power plant's secondary air channel field maintenance, the welding agent is made up of the component of following percetage by weight：Ferric oxide powder 25%~40%, metallic aluminium powder 20%~25%, metallic nickel powder 11.9%~25%, sodium fluoride powder 0.5%~1.5%, SiO 2 powder 1.7%~3.5%, crome metal powder 13%~32%, metal molybdenum powder 0.1%~0.4%, remaining be ferro-titanium powder.Beneficial effects of the present invention：The present invention can realize field maintenance for fracturing and flaking off for secondary air channel, can reduce the difficulty of maintenance, mitigate working strength, shorten maintenance cycle, while can also save material cost.
Description
Technical field
The present invention relates to be used for power plant's secondary air channel field maintenance without electric welding and maintenance of equipment field, more particularly to one kind
Welding agent, by the welding agent prepare for the mould of power plant's secondary air channel field maintenance, using the welding agent to power plant's secondary air channel
The method of field maintenance and the method using the mould to power plant's secondary air channel field maintenance.
Background technology
Secondary air channel is one of part important in Power Plant running, and its material is mostly 2520 heat-resistance stainless steels.
During work, whole pipeline is imbedded in the heat-resisting soil layer of inboard wall of burner hearth, buried depth about 160cm~200cm.During due to work,
Airduct by high-temperature flue gas erosion with washing away, therefore the easily failure such as cracking, local shedding.When partial failure occurs
Afterwards, failure can be aggravated to in-depth development so that the fire prevention soil inside burner hearth suffers erosion, and influences the overall effect of generating set
Fruit, most cause compressor emergency shutdown overhaul at last.At present, the maintenance mode of secondary air channel, it is exactly mainly to change.
It is a kind of new technology based on self- propagating technology without electric welding connection technology, wherein having self- propagating melting welding, self- propagating pressure again
Weldering and self- propagating soldering etc..This technology be required for special auxiliary equipment and specific reaction environment (refer mainly to protective gas species,
Temperature, pressure etc.), can not solve problem at the construction field (site).
In addition, manual SHS weld is also a kind of new method of self- propagating melting welding.This method by conventional bonding technique with
SHS technology is combined, and welding can be realized under conditions of non-transformer, without source of the gas and without any equipment, but apply
Object is welded based on carbon steel, and size is limited, the repair welding that can not solve the problems, such as secondary air channel.
The content of the invention
For problems of the prior art, it is an object of the invention to provide one kind to be used for power plant's secondary air channel scene
The welding agent of maintenance, the mould, secondary to power plant using the welding agent for power plant's secondary air channel field maintenance prepared by the welding agent
The method of airduct field maintenance and the method using the mould to power plant's secondary air channel field maintenance.
The technical scheme is that：
A kind of welding agent for power plant's secondary air channel field maintenance, the welding agent by following percetage by weight component group
Into：
Ferric oxide powder 25%~40%, metallic aluminium powder 20%~25%, metallic nickel powder 11.9%~25%,
Sodium fluoride powder 0.5%~1.5%, SiO 2 powder 1.7%~3.5%, crome metal powder 13%~32%, metal molybdenum powder
Last 0.1%~0.4%, remaining is ferro-titanium powder.
On the basis of such scheme, the welding agent is made up of the component of following percetage by weight：
Ferric oxide powder 35%, metallic aluminium powder 22%, metallic nickel powder 20%, sodium fluoride powder 0.7%, dioxy
SiClx powder 2.0%, crome metal powder 20%, metal molybdenum powder 0.2%, ferro-titanium powder 0.1%.
On the basis of such scheme, the welding agent is made up of the component of following percetage by weight：
Ferric oxide powder 36%, metallic aluminium powder 20%, metallic nickel powder 15%, sodium fluoride powder 1.0%, dioxy
SiClx powder 2.5%, crome metal powder 25%, metal molybdenum powder 0.25%, ferro-titanium powder 0.25%.
On the basis of such scheme, the welding agent is made up of the component of following percetage by weight：
Ferric oxide powder 25%, metallic aluminium powder 25%, metallic nickel powder 13%, sodium fluoride powder 1.2%, dioxy
SiClx powder 3.0%, crome metal powder 32%, metal molybdenum powder 0.3%, ferro-titanium powder 0.5%.
On the basis of such scheme, the welding agent is applied to power plant's secondary air channel that material is 2520 heat-resistance stainless steels.
A kind of mould for power plant's secondary air channel field maintenance, including：Fuse, welding agent, from molten dividing plate, combustion chamber and
Casting cavity；
The combustion chamber has the combustion chamber for being used for accommodating welding agent；The bottom of the combustion chamber sets the first cast passage,
The junction of the combustion chamber and the first cast passage is provided with from molten dividing plate；
Second cast passage is set in the casting cavity；
The combustion chamber and the casting cavity detachable connection；And in use state, the first cast passage and institute
The second cast passage is stated to be connected；
The end of the second cast passage sets shaping area.
On the basis of such scheme, the bottom of the combustion chamber is back taper.
On the basis of such scheme, the material of the combustion chamber and casting cavity is high strength graphite, described from molten dividing plate
Material be mild steel.
A kind of method using above-mentioned welding agent to power plant's secondary air channel field maintenance, caused melting after being burnt using welding agent
The alloy of state and the breakage of secondary air channel form metallurgical binding.
A kind of method using above-mentioned mould to power plant's secondary air channel field maintenance, comprise the following steps that：
Casting cavity is arranged on secondary air channel, and contains breakage completely, is ignited welding agent by fuse, burning is given birth to
Into molten state alloy burn through eventually entered into from molten dividing plate, molten state alloy by the first cast passage and the second cast passage
Shaping area, molten state alloy form metallurgical binding in the breakage of shaping area and secondary air channel, and the temperature at metallurgical binding is certainly
When being so down to 150 DEG C, casting cavity is opened.
Beneficial effects of the present invention：
The present invention can realize field maintenance for fracturing and flaking off for secondary air channel, can reduce the difficulty of maintenance, subtract
Light work intensity, shorten maintenance cycle, while material cost can also be saved.
After self-propagating reaction occurs for welding agent of the present invention, the conjunction of the alloy composition of generation and 2520 heat-resistance stainless steel secondary air channels
Gold has good intersolubility, therefore can carry out welding maintenance to it；It is adjoint when being reacted due to welding agent to generate substantial amounts of heat, because
This can ensure not need outside resources and auxiliary equipment can field conduct weld, this feature allows for this technology can
Field maintenance is realized in burner hearth, shortens and maintains the cycle；In maintenance sites, combustion chamber provided by the invention, casting cavity, only need
Simple location and installation is wanted to can be used, overall process does not need human intervention, substantially reduces the difficulty of operation；Welded using the present invention
Medicine or maintenance die, the airduct for having ftractureed, having come off can be repaired, change the state changed simply in the past, both dropped
Low work difficulty, shortens maintenance cycle, while by having saved cost.
The alloy composition and 2520 stainless steels of welding agent reaction generation form reliable metallurgical binding, have good heat resistance
And wearability.Connected between alloy and mother metal for melting welding, intensity needs suitable for real work.
Brief description of the drawings
Fig. 1 is the structural representation of secondary air channel described in the embodiment of the present invention 5；
Fig. 2 is maintenance die structural representation of the present invention；
Fig. 3 is chamber structure schematic diagram of the present invention.
Embodiment
Embodiment 1
It is a kind of for material for 2520 heat-resistance stainless steels power plant's secondary air channel field maintenance welding agent, the welding agent by with
The component composition of lower percetage by weight：
Ferric oxide powder 35%, metallic aluminium powder 22%, metallic nickel powder 20%, sodium fluoride powder 0.7%, dioxy
SiClx powder 2.0%, crome metal powder 20%, metal molybdenum powder 0.2%, ferro-titanium powder 0.1%.
Field maintenance is carried out in certain power plant's burner hearth, to being found at airduct lower part cracking after field conduct welding, is welded
Medicine generation alloy is filled at cracking, and forms reliable metallurgical binding with mother metal, has reached maintenance purpose, can be effective
Control crackle further expands.
Begin to use after maintenance, (time turn(a)round is 3 months) uses good in two turn(a)rounds, and helpdesk is not sent out
It is now abnormal.
Embodiment 2
It is a kind of for material for 2520 heat-resistance stainless steels power plant's secondary air channel field maintenance welding agent, the welding agent by with
The component composition of lower percetage by weight：
Ferric oxide powder 36%, metallic aluminium powder 20%, metallic nickel powder 15%, sodium fluoride powder 1.0%, dioxy
SiClx powder 2.5%, crome metal powder 25%, metal molybdenum powder 0.25%, ferro-titanium powder 0.25%.
Field maintenance is carried out in certain power plant's burner hearth, on the upper side to airduct in the inner part at the cracking of part, field conduct welding
After find, welding agent generation alloy is filled at cracking, and is formd reliable metallurgical binding with mother metal, has been reached maintenance mesh
, effectively crackle can be controlled to further expand.Simultaneously as positional distance operating surface is higher herein, and go deep into insides of pipes,
The more difficult implementation for the welding of general means, is confirmed by this example, and it is outer that the present invention is more suitable for Site Welding maintenance.
Begin to use after maintenance, (time turn(a)round is 3 months) uses good in two turn(a)rounds, and helpdesk is not sent out
It is now abnormal.
Embodiment 3
It is a kind of for material for 2520 heat-resistance stainless steels power plant's secondary air channel field maintenance welding agent, the welding agent by with
The component composition of lower percetage by weight：
Ferric oxide powder 25%, metallic aluminium powder 25%, metallic nickel powder 13%, sodium fluoride powder 1.2%, dioxy
SiClx powder 3.0%, crome metal powder 32%, metal molybdenum powder 0.3%, ferro-titanium powder 0.5%.
Field maintenance is carried out in certain power plant's burner hearth, it is on the lower side to airduct, find, weld after field conduct welding at local shedding
Medicine generation alloy is completely filled in indentation, there, has recovered original form of secondary air channel, and form reliable smelting with mother metal
Gold combines, and has reached maintenance purpose.
Begin to use after maintenance, (time turn(a)round is 3 months) uses good in two turn(a)rounds, and helpdesk is not sent out
It is now abnormal.
The granularity of material is used in embodiment 1-3：
Ferric oxide powder granularity is in 50-200 mesh, purity >=96%；
Metallic aluminium powder size is in 50~200 mesh, purity >=96%；
Metallic nickel powder granularity is in 50~150 mesh, purity >=96%；
Sodium fluoride powder granularity is in 40~150 mesh, purity >=96%；
SiO 2 powder granularity is in 40~100 mesh, purity >=96%；
Crome metal powder size is in 100~150 mesh, chromium content >=76%；
Metal molybdenum powder size is in 150~200 mesh, purity >=96%；
Ferro-titanium powder granularity is in 100~150 mesh, Ti content >=65%.
Embodiment 4
A kind of welding agent using embodiment 1-3 is power plant's secondary air channel field maintenance of 2520 heat-resistance stainless steels to material
Method, the breakage of the alloy of caused molten condition and secondary air channel forms metallurgical binding after being burnt using welding agent.
In use, welding agent is ignited, self-propagating reaction occurs for the welding agent after igniting, and welding agent reaction produces substantial amounts of heat,
Generate the metal simple-substance and oxide of molten condition simultaneously, metallurgical chemistry reaction occurs for molten metal, formation can with it is 2520 resistance to
Hot stainless steel forms the alloying metal of good metallurgical binding.At the same time, alloying metal efficiently separates with oxide, under metal
Heavy, oxide is floated, and while taking off slag effect, insulation and protective effect are played to alloy melt.The alloying metal of molten condition
The alloying metal of good metallurgical binding is formed with 2520 heat-resistance stainless steels, cools down, crystallize afterwards, solidification, finally being formed with airduct
Reliable metallurgical binding.
Embodiment 5
As shown in Figures 2 and 3, a kind of mould for power plant's secondary air channel field maintenance, including：From molten dividing plate 3, burning
Room 4 and casting cavity 5；
The combustion chamber 4 has the combustion chamber 8 for being used for accommodating welding agent 2；The bottom of the combustion chamber 8 sets the first cast logical
Road 6, the junction that the combustion chamber 8 and first pours into a mould passage 6 are provided with from molten dividing plate 3；
Second cast passage 7 is set in the casting cavity 5；
The combustion chamber 4 and the detachable connection of casting cavity 5；And in use state, it is described first cast passage 6 with
The second cast passage 7 is connected；
The end of the second cast passage 7 sets shaping area 9；The shape of the shaping area 9 is according to secondary air channel
Ftracture, come off place's structures shape, i.e. the shape of shaping area 9 and the cracking of secondary air channel, the place that comes off are mutually complementary；
When the place that comes off of secondary air channel is as shown in Figure 1, shaping area 9 is fabricated to the sky with the place's phase complementary shape that comes off
Chamber,
The bottom of the combustion chamber 8 is back taper.Purpose is that the molten state alloy for making welding agent be formed after burning all flows to
From molten dividing plate 3；
The material of the combustion chamber 4 and casting cavity 5 is high strength graphite, and the material from molten dividing plate 3 is mild steel.
Embodiment 6
As shown in Fig. 2 a kind of mould using embodiment 5 shows to material for power plant's secondary air channel of 2520 heat-resistance stainless steels
The method of field maintenance, is comprised the following steps that：
Ftractureed according to secondary air channel, come off and locate structure fabrication casting cavity 5, principle is：Casting cavity 5 is arranged on secondary air channel
Afterwards, casting cavity 5 contains breakage completely, meanwhile, the shape of the shaping area 9 in casting cavity 5 and the cracking of secondary air channel, come off place
It is mutually complementary；
Casting cavity 5 is arranged on secondary air channel 10 afterwards, and contains breakage (ftractureing, come off place) completely, by drawing
Live wire 1 ignites welding agent 2, and self-propagating reaction occurs in combustion chamber 4 for welding agent, and welding agent reaction produces substantial amounts of heat, generated simultaneously
Metallurgical chemistry reaction occurs in combustion chamber 4 for the metal simple-substance and oxide of molten condition, molten metal, and formation can be with 2520
Heat-resistance stainless steel forms the alloying metal of good metallurgical binding.At the same time, efficiently separated with alloying metal and oxide, metal
Sink, oxide is floated, and while taking off slag effect, insulation and protective effect are played to alloy melt；
The generated molten state alloy of burning is sunk to from after molten dividing plate 3, and the heat burn through of metal stream is from dividing plate 3 is melted, so
Afterwards, molten state alloy pours into a mould passage 7 to flowing down by the first cast passage 6 and second, eventually enters into shaping area 9, and molten state is closed
Gold forms metallurgical binding in shaping area 9 with the breakage of secondary air channel, cools down, crystallizes afterwards, solidification, at metallurgical binding
When temperature is down to 150 DEG C naturally, casting cavity 5 is opened, casting is completed.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (9)
- A kind of 1. welding agent for power plant's secondary air channel field maintenance, it is characterised in that：The welding agent is by following percetage by weight Component composition：Ferric oxide powder 25%~40%, metallic aluminium powder 20%~25%, metallic nickel powder 11.9%~25%, fluorination Sodium powder end 0.5%~1.5%, SiO 2 powder 1.7%~3.5%, crome metal powder 13%~32%, metal molybdenum powder 0.1%~0.4%, remaining is ferro-titanium powder；The welding agent is used for maintenance of the material for power plant's secondary air channel of 2520 heat-resistance stainless steels.
- 2. the welding agent according to claim 1 for power plant's secondary air channel field maintenance, it is characterised in that：The welding agent by The component composition of following percetage by weight：Ferric oxide powder 35%, metallic aluminium powder 22%, metallic nickel powder 20%, sodium fluoride powder 0.7%, silica Powder 2.0%, crome metal powder 20%, metal molybdenum powder 0.2%, ferro-titanium powder 0.1%.
- 3. the welding agent according to claim 1 for power plant's secondary air channel field maintenance, it is characterised in that：The welding agent by The component composition of following percetage by weight：Ferric oxide powder 36%, metallic aluminium powder 20%, metallic nickel powder 15%, sodium fluoride powder 1.0%, silica Powder 2.5%, crome metal powder 25%, metal molybdenum powder 0.25%, ferro-titanium powder 0.25%.
- 4. the welding agent according to claim 1 for power plant's secondary air channel field maintenance, it is characterised in that：The welding agent by The component composition of following percetage by weight：Ferric oxide powder 25%, metallic aluminium powder 25%, metallic nickel powder 13%, sodium fluoride powder 1.2%, silica Powder 3.0%, crome metal powder 32%, metal molybdenum powder 0.3%, ferro-titanium powder 0.5%.
- A kind of 5. mould for power plant's secondary air channel field maintenance, it is characterised in that including：From molten dividing plate (3), combustion chamber And casting cavity (5) (4)；The combustion chamber (4) has the combustion chamber (8) for being used for accommodating welding agent (2)；The bottom of the combustion chamber (8) sets first to pour Passage (6) is noted, the combustion chamber (8) is provided with from molten dividing plate (3) with the first junction for pouring into a mould passage (6)；Second cast passage (7) is set in the casting cavity (5)；The combustion chamber (4) and the casting cavity (5) detachable connection；And in use state, the first cast passage (6) It is connected with the described second cast passage (7)；The end of the second cast passage (7) sets shaping area (9)；The welding agent (2) is made up of the component of following percetage by weight：Ferric oxide powder 25%~40%, metallic aluminium powder 20%~25%, metallic nickel powder 11.9%~25%, sodium fluoride powder 0.5%~1.5%, SiO 2 powder 1.7%~ 3.5%th, crome metal powder 13%~32%, metal molybdenum powder 0.1%~0.4%, remaining be ferro-titanium powder.
- 6. mould according to claim 5, it is characterised in that：The bottom of the combustion chamber (8) is back taper.
- 7. mould according to claim 5, it is characterised in that：The material of the combustion chamber (4) and casting cavity (5) is high-strength Graphite is spent, the material from molten dividing plate (3) is mild steel.
- 8. the welding agent described in a kind of usage right requirement any one of 1-4 is to the method for power plant's secondary air channel field maintenance, its feature It is, the breakage of the alloy of caused molten condition and secondary air channel forms metallurgical binding after being burnt using welding agent.
- 9. a kind of mould of use according to claim any one of 5-7 be to the method for power plant's secondary air channel field maintenance, its It is characterised by, comprises the following steps that：Ftractureed according to secondary air channel, come off and locate structure fabrication casting cavity (5), after the casting cavity (5) is arranged on secondary air channel, Casting cavity (5) contains breakage completely, meanwhile, the shape of shaping area (9) and ftractureing, taking off for secondary air channel in casting cavity (5) It is mutually complementary to fall place；Casting cavity (5) is arranged on secondary air channel afterwards, and contains breakage completely；Ignited welding agent (2) by fuse (1), the generated molten state alloy burn through of burning is from molten dividing plate (3), molten state alloy By the first cast passage (6) and the second cast passage (7), shaping area (9) is eventually entered into, molten state alloy is in shaping area (9) Metallurgical binding is formed with the breakage of secondary air channel, when the temperature at metallurgical binding is down to 150 DEG C naturally, opens casting cavity (5), casting is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610125506.4A CN105618713B (en) | 2016-03-07 | 2016-03-07 | A kind of welding agent, mould, the method using welding agent or mold repair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610125506.4A CN105618713B (en) | 2016-03-07 | 2016-03-07 | A kind of welding agent, mould, the method using welding agent or mold repair |
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| Publication Number | Publication Date |
|---|---|
| CN105618713A CN105618713A (en) | 2016-06-01 |
| CN105618713B true CN105618713B (en) | 2018-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610125506.4A Expired - Fee Related CN105618713B (en) | 2016-03-07 | 2016-03-07 | A kind of welding agent, mould, the method using welding agent or mold repair |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4250944A (en) * | 1978-06-08 | 1981-02-17 | Elektrothermit Gmbh | Process for performing aluminothermic rail connection weldings as well as multipart casting mold for performing the process |
| CN103506755A (en) * | 2013-10-14 | 2014-01-15 | 湖北威达电气有限公司 | Iron-based nonelectric welding device |
| CN103639589A (en) * | 2013-12-20 | 2014-03-19 | 武汉大学 | Aluminum-steel heat release welding method |
| CN103894730A (en) * | 2014-03-20 | 2014-07-02 | 南京唐模电气科技有限公司 | Module combined type heat-released welding mould |
| CN104816083A (en) * | 2015-05-22 | 2015-08-05 | 武汉钢铁(集团)公司 | Continuous casting plate blank surface vertical crack cleaning method based on aluminum heat self-propagating technology |
-
2016
- 2016-03-07 CN CN201610125506.4A patent/CN105618713B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4250944A (en) * | 1978-06-08 | 1981-02-17 | Elektrothermit Gmbh | Process for performing aluminothermic rail connection weldings as well as multipart casting mold for performing the process |
| CN103506755A (en) * | 2013-10-14 | 2014-01-15 | 湖北威达电气有限公司 | Iron-based nonelectric welding device |
| CN103639589A (en) * | 2013-12-20 | 2014-03-19 | 武汉大学 | Aluminum-steel heat release welding method |
| CN103894730A (en) * | 2014-03-20 | 2014-07-02 | 南京唐模电气科技有限公司 | Module combined type heat-released welding mould |
| CN104816083A (en) * | 2015-05-22 | 2015-08-05 | 武汉钢铁(集团)公司 | Continuous casting plate blank surface vertical crack cleaning method based on aluminum heat self-propagating technology |
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| CN105618713A (en) | 2016-06-01 |
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