CN104476004A - Fluorine-containing cored electrode - Google Patents
Fluorine-containing cored electrode Download PDFInfo
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- CN104476004A CN104476004A CN201410746944.3A CN201410746944A CN104476004A CN 104476004 A CN104476004 A CN 104476004A CN 201410746944 A CN201410746944 A CN 201410746944A CN 104476004 A CN104476004 A CN 104476004A
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- CN
- China
- Prior art keywords
- fluorine
- parts
- weight
- cored electrode
- molten slag
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Classifications
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- 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
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/368—Selection of non-metallic compositions of core materials either alone or conjoint with selection of soldering or welding materials
Abstract
The invention discloses a fluorine-containing cored electrode comprising a metal clad and a filler composite. The filler composite comprises, by weight, 20-85 parts of metal oxide molten slag forming agent, 1-22 parts of fluorochemicals and 5-45 parts of metallic reducing agent, the parts by weight of the metal oxide molten slag forming agent are more than that of the fluorochemicals, and fluorine provided by the fluorochemicals accounts for at least 2% of the weight of the filler composite. The fluorochemicals in a core can be used for lowering the melting point of molten slag. By the lower melting point of the molten slag, the molten state of the molten slag can be kept for longer time, and more time is provided for gas to be released from molten welds and dissolved in the molten slag. The fluorine in the molten slag reacts with the released hydrogen to form HF. By the formation of the HF, hydrogen partial pressure in a welding system is lowered, and further formation of air holes in the welds is reduced. By the fluorine in the molten slag, the content of the hydrogen in the welds can be lowered as well.
Description
Technical field
The application relates to welding field, specifically a kind of flux cored electrode with fluorine.
Background technology
In arc welding field, the main Types of welding procedure uses the gas shielded arc welding of real core welding rod or gas shield flux-cored electrode arc welding and submerged-arc welding.In these techniques, the welding procedure due to the gas shielded arc welding using real core or metal cored electrode has productivity ratio and the versatility of raising, and therefore, it becomes day by day universal.This raising in productivity ratio and versatility comes from the continuity of welding rod in gas shielded arc welding, has quite high productivity ratio.And the weld seam slag using these welding rods to be formed is considerably less, which offers a saving for clean welds and time and the cost of removing slag.But in the gas shielded arc welding using real core or flux-cored electrode, splashing is large, flue dust is serious.
Suitably to adulterate other compositions at real core welding rod, combine with protective gas, make it have good physical and mechanical property.Flux-cored electrode becomes the substitute of real core welding rod day by day, because it has more high production rate in the welding processing of structure member.Flux-cored electrode is a kind of composite electrode, and medicine core (filler) material that it is wrapped up by metal-back forms.This medicine core forms, to obtain the good profile etc. of arc stability, solder wettability and weld seam, to obtain the physical and mechanical property of needs in welding primarily of metal dust and welding agent component.Flux-cored electrode is manufactured by following method: be contained in profiled strip by mixing drug core component, is then closed by band and is stretched to final diameter.Compared with real core welding rod, flux-cored electrode has higher appearance of weld speed, forms wider, more continuous print weld penetration profile.And compared with real core welding rod, they have the arc behavior of improvement, produce less smog and splashing, and give weld deposit better wetability.
In arc welding, use welding agent to control arc stability, regulate weld seam composition, and produce the oxidation of protective atmosphere from air, usually by regulating the composition of welding agent to control arc stability.Therefore, wish that there is the material that can play plasma electric charge carrier function well in medicine core mixture.Medicine core mixture is more meltable in molten bath in welding process, and easy and other impurity combination formation slag, the performance of the adjustment weld seam come further.Also can add other material to reduce slag fusing point in medicine core mixture, improve the mobility of slag, and as the binding agent of core wire drug particles.
In weld seam forming process, one of difficult problem forms high-quality weld seam, cavitations is mingled with in weld seam forming process, this phenomenon is mainly observed in the slag system (rutile-based) of cooling fast, due to the rapid solidification of slag, the gas shed from the weld seam of fusing is partly kept here, so just defines the pore of depression and weld seam inside at face of weld.
Application number: 96244454.5, denomination of invention is cored electrode with composite structure, it discloses a kind of cored electrode with composite structure, a kind of weld metal pipe or seamless metal pipe is adopted to be welded tube, pipe is outer scribbles coating, is filled with powdery or granular alloy medicine core in pipe, and the front end of welding rod is spun into arc-shaped sealing, and having ignition tip, its end has receives head and retained part.
Application number: 97219676.5, denomination of invention is flux-cored electrode, which solve welding rod with front needing to dry, problem costly.It is characterized in that the welding rod shell hollow of metal material is equipped with welding rod powder, shell outer contacting has conduction nozzle, has welding quality good, the feature that welding rod need not be dried.
In view of the problem of above-mentioned slag in weld pore, need to provide a kind of welding rod of weld seam that can form high-quality, weak breath hole.
Summary of the invention
The technical problem that the application will solve is for above-mentioned the deficiencies in the prior art, and provides a kind of flux cored electrode with fluorine, and it can form the weld seam in high-quality, weak breath hole.
The application is achieved through the following technical solutions:
A kind of flux cored electrode with fluorine, comprise metal-back and fill composition, the weight portion of each component contained in described fill composition is:
Metal oxide slag forming agent: 20-85 part,
Fluorochemical: 1-22 part,
Metallic reducing agent: 5-45 part,
The parts by weight of described metal oxide slag forming agent are greater than the parts by weight of described fluorochemical, and the fluorine that described fluorochemical provides is at least 2% of fill composition weight; Metal oxide slag forming agent comprises rutile, silicon-potassium titanate, A1
20
3one or more.
Described metal oxide slag forming agent is the mixture of rutile and silicon-potassium titanate, and wherein, rutile accounts for 15 parts (weight portions), and silicon-potassium titanate accounts for 25 parts (weight portions).
Described fluorochemical comprises K
2siF
6, Na
2siF
6, Na
3alF
6, K
3a1F
6, KF and MnF.
Described metal-back contains the iron of at least 80% weight.
Described fill composition accounts for the 10-65% of described flux cored electrode with fluorine gross weight.
Described metal oxide slag forming agent is rutile and A1
20
3mixture, wherein, rutile accounts for 15 parts (weight portions), A1
20
3account for 3 parts (weight portions).
Compared with prior art, this flux cored electrode with fluorine has the following advantages:
1, appearance of weld is good, and flue dust is little, splashes little;
2, weld blowhole is little, spatter loss coefficient is low;
3, the fluorochemical in medicine core may be used for the fusing point reducing slag.The time that lower slag fusing point can make the molten state of slag keep longer, to make gas have the more time discharge from the weld seam of fusing and be dissolved in slag.In slag fluorine can with release hydrogen reaction and form HF.The formation of HF reduces hydrogen dividing potential drop in welding system, and then reduces the formation of pore in weld seam.Fluorine in slag also can reduce the content of hydrogen in weld seam.
Detailed description of the invention
For making the object of the application and technical scheme clearly, be clearly and completely described below in conjunction with the technical scheme of the embodiment of the present application to the application.Obviously, described embodiment is a part of embodiment of the application, instead of whole embodiments.Based on the embodiment of described the application, the every other embodiment that those of ordinary skill in the art obtain under without the need to the prerequisite of creative work, all belongs to the scope of the application's protection.
The flux cored electrode with fluorine of the application overcomes the relevant issues such as weld porosity.The fill composition of flux cored electrode with fluorine contains slag forming agent, fluorochemical is used for regulating institute in welding process to form the performance of slag, so that minimizing or elimination gas pore in weld metal.Eurypalynous fluorochemical perhaps can be used in fill composition.
Embodiment 1
A kind of flux cored electrode with fluorine, comprise metal-back and fill composition, the weight portion of each component contained in described fill composition is:
Metal oxide slag forming agent: 35 parts,
Fluorochemical: 12 parts,
Metallic reducing agent: 25 parts,
The parts by weight of described metal oxide slag forming agent are greater than the parts by weight of described fluorochemical, and the fluorine that described fluorochemical provides is at least 2% of fill composition weight.
Described metal oxide slag forming agent is the mixture of rutile and silicon-potassium titanate, and wherein, rutile accounts for 15 parts (weight portions), and silicon-potassium titanate accounts for 25 parts (weight portions).
Described fluorochemical is K
2siF
6, Na
2siF
6mixture.
Described metal-back contains the iron of at least 80% weight.
Described fill composition accounts for 35% of described flux cored electrode with fluorine gross weight.
Embodiment 2
A kind of flux cored electrode with fluorine, comprise metal-back and fill composition, the weight portion of each component contained in described fill composition is:
Metal oxide slag forming agent: 45 parts,
Fluorochemical: 22 parts,
Metallic reducing agent: 35 parts,
The parts by weight of described metal oxide slag forming agent are greater than the parts by weight of described fluorochemical, and the fluorine that described fluorochemical provides is at least 2% of fill composition weight.
Described metal oxide slag forming agent is rutile and A1
20
3mixture, wherein, rutile accounts for 15 parts (weight portions), A1
20
3account for 3 parts (weight portions).
Described fluorochemical is K
3a1F
6, KF and MnF mixture.
Described metal-back contains the iron of at least 80% weight.
Described fill composition accounts for 45% of described flux cored electrode with fluorine gross weight.
To describe flux cored electrode with fluorine described in the embodiment of the present application technological parameter that can use and fusion penetration data when ensureing appearance of weld in following table:
| Embodiment | Welding current/A | Arc voltage/V | Fusion penetration/mm | Pore | Spatter loss coefficient |
| Embodiment 1 | 270-285 | 19-25 | 5.2 | Less and little | 3.7% |
| Embodiment 2 | 275-290 | 18-23 | 5.0 | Less and little | 3.2% |
In superincumbent specific embodiment, in fill composition, add these components to obtain the metal alloy composition required for weld metal, and to reduce in weld metal in welding process and around oxygen.Other or additional alloying constituent and/or reducing agent can also be used in fill composition.Other or additional microalloy agent can be used in fill composition.Add cast iron powder and/or iron powder also in order to obtain metal alloy composition required in weld metal.Fluorochemical may be used for the fusing point reducing slag.The time that lower slag fusing point can make the molten state of slag keep longer, to make gas have the more time discharge from the weld seam of fusing and be dissolved in slag.Also promote the formation of HF containing fluorine in slag.One of gas discharged from weld seam is hydrogen.In slag fluorine can with release hydrogen reaction and form HF, the formation of HF reduces hydrogen dividing potential drop in welding system, and then reduces the formation of pore in weld seam.Fluorine in slag also can reduce the content of hydrogen in weld seam.
In welding process, certain fluoride decomposes and discharge fluorine gas in air.The fluorine gas discharged has the effect of protection, and it protects the impact of weld seam from ambient gas of fusing.In addition, some fluorine can form HF with hydrogen reaction, and it is insoluble in the weld metal melted.Some low melting point fluorochemical covers in welded joints to form the impact of barrier from ambient hydrogen.Therefore, it is possible to the hydrogen amount diffusing into weld seam decreases.Fluorine in slag can regulate slag structure, can improve the spilling of hydrogen from the weld metal of fusing.Hydrogen, from the spilling of the weld metal of fusing, reduces the generation that the amount of hydrogen in weld seam also reduces pore simultaneously.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, and all terms used herein (comprising technical term and scientific terminology) have the meaning identical with the general understanding of the those of ordinary skill in field belonging to the application.Should also be understood that those terms defined in such as general dictionary should be understood to have the meaning consistent with the meaning in the context of prior art, unless and define as here, can not explain by idealized or too formal implication.
The implication of the "and/or" described in the application refers to respective individualism or both simultaneous situations include interior.
With the above-mentioned desirable embodiment according to the application for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this application technological thought, can carry out various change and amendment completely.The technical scope of this application is not limited to the content on description, must determine its technical scope according to right.
Claims (6)
1. a flux cored electrode with fluorine, is characterized in that, comprises metal-back and fill composition, and the weight portion of each component contained in described fill composition is:
Metal oxide slag forming agent: 20-85 part,
Fluorochemical: 1-22 part,
Metallic reducing agent: 5-45 part,
The parts by weight of described metal oxide slag forming agent are greater than the parts by weight of described fluorochemical, and the fluorine that described fluorochemical provides is at least 2% of fill composition weight; Metal oxide slag forming agent comprises rutile, silicon-potassium titanate, A1
20
3one or more.
2. flux cored electrode with fluorine as claimed in claim 1, it is characterized in that, described metal oxide slag forming agent is the mixture of rutile and silicon-potassium titanate, and wherein, rutile accounts for 15 parts (weight portions), and silicon-potassium titanate accounts for 25 parts (weight portions).
3. flux cored electrode with fluorine as claimed in claim 1, it is characterized in that, described fluorochemical comprises K
2siF
6, Na
2siF
6, Na
3alF
6, K
3a1F
6, KF and MnF.
4. flux cored electrode with fluorine as claimed in claim 1, it is characterized in that, described metal-back contains the iron of at least 80% weight.
5. flux cored electrode with fluorine as claimed in claim 1, it is characterized in that, described fill composition accounts for the 10-65% of described flux cored electrode with fluorine gross weight.
6. flux cored electrode with fluorine as claimed in claim 1, it is characterized in that, described metal oxide slag forming agent is rutile and A1
20
3mixture, wherein, rutile accounts for 15 parts (weight portions), A1
20
3account for 3 parts (weight portions).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410746944.3A CN104476004A (en) | 2014-12-10 | 2014-12-10 | Fluorine-containing cored electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410746944.3A CN104476004A (en) | 2014-12-10 | 2014-12-10 | Fluorine-containing cored electrode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104476004A true CN104476004A (en) | 2015-04-01 |
Family
ID=52750678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410746944.3A Withdrawn CN104476004A (en) | 2014-12-10 | 2014-12-10 | Fluorine-containing cored electrode |
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| Country | Link |
|---|---|
| CN (1) | CN104476004A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2269923Y (en) * | 1996-12-12 | 1997-12-10 | 机械工业部哈尔滨焊接研究所 | Cored electrode with composite structure |
| CN1799755A (en) * | 2005-01-03 | 2006-07-12 | 林肯环球公司 | Cored electrode for reducing diffusible hydrogen |
| US20060219685A1 (en) * | 2005-04-05 | 2006-10-05 | Lincoln Global, Inc., A Corporation Of The State Of Delaware | Flux cored electrode with fluorine |
| CN1846927A (en) * | 2005-04-05 | 2006-10-18 | 林肯环球公司 | Modified flux system in cored electrode |
| EP1775060A1 (en) * | 2005-10-05 | 2007-04-18 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Metall-Fülldraht zum Lichtbogenschweissen in vertikaler senkender Lage |
-
2014
- 2014-12-10 CN CN201410746944.3A patent/CN104476004A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2269923Y (en) * | 1996-12-12 | 1997-12-10 | 机械工业部哈尔滨焊接研究所 | Cored electrode with composite structure |
| CN1799755A (en) * | 2005-01-03 | 2006-07-12 | 林肯环球公司 | Cored electrode for reducing diffusible hydrogen |
| US20060219685A1 (en) * | 2005-04-05 | 2006-10-05 | Lincoln Global, Inc., A Corporation Of The State Of Delaware | Flux cored electrode with fluorine |
| CN1846927A (en) * | 2005-04-05 | 2006-10-18 | 林肯环球公司 | Modified flux system in cored electrode |
| EP1775060A1 (en) * | 2005-10-05 | 2007-04-18 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Metall-Fülldraht zum Lichtbogenschweissen in vertikaler senkender Lage |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C04 | Withdrawal of patent application after publication (patent law 2001) | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20150401 |