CN106041363B - A kind of low temperature unimach flux-cored wire - Google Patents
A kind of low temperature unimach flux-cored wire Download PDFInfo
- Publication number
- CN106041363B CN106041363B CN201610629232.2A CN201610629232A CN106041363B CN 106041363 B CN106041363 B CN 106041363B CN 201610629232 A CN201610629232 A CN 201610629232A CN 106041363 B CN106041363 B CN 106041363B
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- Prior art keywords
- flux
- medicine core
- unimach
- low temperature
- medicine
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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
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/3073—Fe as the principal constituent with Mn as next major constituent
-
- 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
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
- B23K35/0266—Rods, electrodes, wires flux-cored
-
- 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
- B23K35/3601—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 with inorganic compounds as principal constituents
- B23K35/3608—Titania or titanates
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The present invention provides a kind of low temperature unimach flux-cored wires, including carbon steel crust and medicine core, the ingredient of the medicine core and its shared mass percentage content in medicine core are as follows: rutile 33~38%, zircon sand 2~6%, high carbon ferromanganese 25~30%, barium fluoride 6~8%, almag 2~4%, ferrosilicon 5~7%, ferrotianium 5~7%, rare earth ferrosilicon 1.5~3%, nickel powder 8~10%, surplus are iron powder.The low temperature unimach uses CO with flux-cored wire2Shielding gas, deposited metal and welding point comprehensive performance: yield strength >=550MPa；Tensile strength >=670MPa；Elongation >=20%；Under the conditions of -40 DEG C, Akv >=55J；And the flux-cored wire deposited metal nickel content is less than 1.4%, and without precious metals such as Mo, Cr, weld metal has good toughness and cold-crack resistance energy.
Description
Technical field
The invention belongs to welding material manufacturing technology fields, and in particular to a kind of low temperature unimach flux-cored wire,
It is mating to be used for yield strength 550MPa grades of steel.
Background technique
Gas-shielded flux-cored wire welding method has very high welding efficiency, can get the good weld seam of comprehensive performance.?
The industries such as shipbuilding, ocean engineering obtain more and more applications, need largely to use low temperature in offshore oil drilling platform construction
Ultra-high tensile steel welding material, it is especially desirable to the flux-cored wire with favorable low-temperature impact toughness.
Currently, common unimach steel plate mainly includes EQ56, EH550 etc. in drilling platforms and marine worker project, and
Corresponding welding material is mainly the product of the foreign countries such as U.S.；The demand of matched flux-cored wire will be more and more, but state
Outer flux-cored wire product is mostly using argon-rich gas as protective gas.
Summary of the invention
The object of the present invention is to provide a kind of low temperature unimach flux-cored wires, are able to satisfy under -40 DEG C of cryogenic conditions
Impact flexibility requirement, and 550MPa grades of its yield strength.
The technical solution of the present invention is to provide a kind of low temperature unimach flux-cored wires, including carbon steel crust and medicine
Core, the ingredient of the medicine core and its shared mass percentage content in medicine core are as follows: rutile 33~38%, zircon sand 2~
6%, high carbon ferromanganese 25~30%, barium fluoride 6~8%, almag 2~4%, ferrosilicon 5~7%, ferrotianium 5~7%, rare earth silicon
Iron 1.5~3%, nickel powder 8~10%, surplus are iron powder.
Further, the ingredient of above-mentioned medicine core and its shared mass percentage content in medicine core are as follows: rutile 33~
35%, zircon sand 2~6%, high carbon ferromanganese 26~30%, barium fluoride 7~8%, almag 2~4%, ferrosilicon 5~6%, titanium
Iron 5~7%, rare earth ferrosilicon 2~3%, nickel powder 8~8.5%, surplus are iron powder.
Further, the quality of above-mentioned medicine core is the 12~16% of flux-cored wire gross mass.
Preferably, the quality of above-mentioned medicine core is the 13% of flux-cored wire gross mass, the ingredient of the medicine core and its in medicine core
In shared mass percentage content are as follows: rutile 33%, zircon sand 6%, high carbon ferromanganese 30%, barium fluoride 8%, almag
2%, ferrosilicon 5%, ferrotianium 5%, rare earth ferrosilicon 1.5%, nickel powder 8%, surplus is iron powder.
Preferably, the quality of above-mentioned medicine core is the 16% of flux-cored wire gross mass, the ingredient of the medicine core and its in medicine core
In shared mass percentage content are as follows: rutile 38%, zircon sand 2%, high carbon ferromanganese 25%, barium fluoride 6%, almag
4%, ferrosilicon 7%, ferrotianium 7%, rare earth ferrosilicon 1.5%, nickel powder 8.5%, surplus is iron powder.
Preferably, the quality of above-mentioned medicine core is the 13% of flux-cored wire gross mass, the ingredient of the medicine core and its in medicine core
In shared mass percentage content are as follows: rutile 33%, zircon sand 2%, high carbon ferromanganese 30%, barium fluoride 6%, almag
2.5%, ferrosilicon 6%, ferrotianium 5%, rare earth ferrosilicon 2%, nickel powder 10%, surplus is iron powder.
Preferably, the quality of above-mentioned medicine core is the 14% of flux-cored wire gross mass, the ingredient of the medicine core and its in medicine core
In shared mass percentage content are as follows: rutile 35%, zircon sand 5%, high carbon ferromanganese 26%, barium fluoride 7%, almag
3%, ferrosilicon 5.5%, ferrotianium 6.5%, rare earth ferrosilicon 2.5%, nickel powder 8.5%, surplus is iron powder.
Further, in above-mentioned high carbon ferromanganese the mass percent of C 7% or more；When C content is low in high carbon ferromanganese,
In order to make weld seam intensity with higher, further amounts of high carbon ferromanganese will be used, will be increased in the flue dust that welding process generates
The concentration of manganese oxide, harm welding operator's health.
Further, above-mentioned carbon steel crust is SPCC steel band.
Low temperature unimach of the present invention is made with flux-cored wire using conventional flux-cored wire manufacturing process.
The present invention also provides above-mentioned low temperature unimach flux-cored wire welding method, welding condition are as follows: protection
Gas CO2Purity 99.95%, 230~250A of welding current, 26~28V of weldingvoltage, speed of welding 30mm/min.
The design principle of low temperature unimach medicine core solder wire formula of the present invention: containing a large amount of rutile in the present invention,
It can ensure that with good all-position welding applicability；Take a variety of strong deoxidant element combined deoxidation modes, while carbon, manganese, silicon
It is transitioned into weld seam as alloying component, so that it is guaranteed that weld metal yield strength can reach 550MPa or more.
Rutile main component is TiO in medicine core component2, play fluxing effect；Rutile mass percentage is less than 33%
When, all-position welding is neutral, the difficult operation of overhead welding, forms bad；When rutile is more than 38%, slag fusing point is increased, welding process
In be also easy to produce slag inclusion and appearance of weld and be deteriorated.
Zircon sand contains more ZrO2, be conducive to improve the slag removability of slag；Zircon sand mass percentage be less than 2% when pair
De- slag improvement result is unobvious, and when zircon sand mass percentage is more than 6%, weld seam residual slag easily occurs in when all-position welding
The phenomenon that.
High carbon ferromanganese refers to that wherein Mn can participate in deoxidation, while have alloying containing the manganeisen for being more than 7% carbon
Effect；Carbon is transitioned into weld seam as main intensified element.When medicine core medium high carbon manganese weight of iron percentage composition is less than 25%, weld seam Mn
Content is low, is unfavorable for weld seam hot stage and obtains more tiny austenite, so as to cause weld seam cold stage be difficult to obtain compared with
More tiny acicular ferrites, impact flexibility is low and yield strength and tensile strength are low, is not able to satisfy corresponding requirements；High carbon ferromanganese
When mass percentage content is more than 30%, weld seam C, Mn too high levels easily form coarse high carbon martensite, though it is strong to improve tension
It spends but reduces impact flexibility.When weld seam weld seam contains suitable carbon, in addition to obtaining tiny acicular ferrite, also can get a small amount of
Low-carbon martensite, because of low-carbon martensite, its formation temperature is higher, and " self tempering " occurs in weld seam temperature-fall period, has weld seam
Higher-strength and good toughness.
Barium fluoride (BaF2) fluorine is decomposited in welding, weld seam diffusible hydrogen content can be reduced with dehydrogenation, reduce and generate cold crack
Probability；When barium fluoride mass percentage is less than 6%, dehydrogenation is unobvious；When its mass percentage is more than 8%, weldering
Molten drop becomes larger in termination process, and splashing increases, and welding procedure is deteriorated；In addition, BaO can be formed after barium fluoride dehydrogenation, slag alkali is improved
Degree.
Almag is as deoxidier, deoxidation products Al2O3And MgO, suitable Al2O3All-position welding behaviour can be improved
Make processing performance, slag basicity can be improved in MgO；Almag can make to form Ti in melt tank reaction as deoxidier2O3, promote needle
Columnar ferrite forming core, to improve weld seam impact toughness；Almag can also reduce weld seam N content, further increase impact
Toughness.
Ferrosilicon has alloying effect, and ferrotianium is as deoxidier, it is ensured that deposited metal yield strength grade meets 550MPa；
When content is excessive, yield strength is excessively high, and weld seam impact toughness decline, then weld strength does not reach requirement content very little.
In general, rare earth has been oxidized in rare earth oxide, because the fusing point of rare earth oxide is generally higher, only molten
Stage in pond stage plays Grain refinement as nucleating agent.And it is dilute containing more activity in the rare earth ferrosilicon selected in the present invention
Soil may participate in the reaction such as deoxidation, desulfurization, dephosphorization, further purify molten drop molten bath, improve weld seam degree of purity, reduces O, S, P etc.
Impurity content improves weld seam impact toughness.When rare earth ferrosilicon mass percentage is less than 1.5%, unobvious, quality hundred is acted on
When point content is more than 3%, active content of rare earth is excessive in weld metal, will lead to oxygen content and drastically reduces, and occur rare earth " in
Poison " phenomenon, reduces impact flexibility instead.
Nickel powder contains a large amount of Ni, uses as alloying agent, and weld seam contains suitable Ni, can reduce brittle transition temperature,
Meet the requirements low-temperature impact toughness.
Compared with prior art, beneficial effects of the present invention:
(1) this low temperature unimach provided by the invention uses CO with flux-cored wire2Shielding gas has excellent
Good welding technological properties, deposited metal and welding point comprehensive performance: yield strength >=550MPa；Tensile strength >=
670MPa；Elongation >=20%；At -40 DEG C, Akv >=55J.
(2) this low temperature unimach provided by the invention with flux-cored wire deposited metal nickel content be less than 1.4%, and
Without precious metals such as Mo, Cr, weld metal has good toughness and cold-crack resistance energy.
Specific embodiment
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel all other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Embodiment low temperature unimach is shown in Table 1 with medicine core solder wire formula, and sheetmetal is SPCC steel band, is welded using conventional medicine core
Silk manufacturing process is made.Table 2 show the chemical component and mechanical property of corresponding embodiment flux-cored wire deposited metal；It is welded
Condition: protective gas CO2Purity 99.95%, 230~250A of welding current, 26~28V of weldingvoltage, speed of welding 30mm/
min。
Table 1: flux-cored wire formula (mass percent)
Table 2: the chemical component and mechanical property of deposited metal
From the chemical component of 2 illustrated embodiment of table 1 and table it follows that flux-cored wire of the invention uses CO2Protect gas
Body welding, deposited metal and welding point comprehensive performance: yield strength >=550MPa；Tensile strength >=670MPa；Elongation >=
20%；Under the conditions of -40 DEG C, Akv >=55J；And the flux-cored wire deposited metal nickel content is less than 1.4%, and without Mo, Cr etc.
Precious metal, weld metal have good toughness and cold-crack resistance energy.
The foregoing examples are only illustrative of the present invention, does not constitute the limitation to protection scope of the present invention, all
It is within being all belonged to the scope of protection of the present invention with the same or similar design of the present invention.
Claims (9)
1. a kind of low temperature unimach flux-cored wire, including carbon steel crust and medicine core, it is characterised in that: the medicine core at
Point and its shared mass percentage content in medicine core are as follows: rutile 33~38%, zircon sand 2~6%, high carbon ferromanganese 25~
30%, barium fluoride 6~8%, almag 2~4%, ferrosilicon 5~7%, ferrotianium 5~7%, rare earth ferrosilicon 1.5~3%, nickel powder 8
~10%, surplus is iron powder, and the mass percent of C is 7% or more in the high carbon ferromanganese.
2. low temperature unimach flux-cored wire as described in claim 1, it is characterised in that: the ingredient of the medicine core and its
The shared mass percentage content in medicine core are as follows: rutile 33~35%, zircon sand 2~6%, high carbon ferromanganese 26~30%,
Barium fluoride 7~8%, almag 2~4%, ferrosilicon 5~6%, ferrotianium 5~7%, rare earth ferrosilicon 2~3%, nickel powder 8~
8.5%, surplus is iron powder.
3. low temperature unimach flux-cored wire as described in claim 1, it is characterised in that: the quality of the medicine core is medicine
The 12~16% of core welding wire gross mass.
4. low temperature unimach flux-cored wire as claimed in claim 3, it is characterised in that: the quality of the medicine core is medicine
The 13% of core welding wire gross mass, the ingredient of the medicine core and its shared mass percentage content in medicine core are as follows: rutile
33%, zircon sand 6%, high carbon ferromanganese 30%, barium fluoride 8%, almag 2%, ferrosilicon 5%, ferrotianium 5%, rare earth ferrosilicon
1.5%, nickel powder 8%, surplus is iron powder.
5. low temperature unimach flux-cored wire as claimed in claim 3, it is characterised in that: the quality of the medicine core is medicine
The 16% of core welding wire gross mass, the ingredient of the medicine core and its shared mass percentage content in medicine core are as follows: rutile
38%, zircon sand 2%, high carbon ferromanganese 25%, barium fluoride 6%, almag 4%, ferrosilicon 7%, ferrotianium 7%, rare earth ferrosilicon
1.5%, nickel powder 8.5%, surplus is iron powder.
6. low temperature unimach flux-cored wire as claimed in claim 3, it is characterised in that: the quality of the medicine core is medicine
The 13% of core welding wire gross mass, the ingredient of the medicine core and its shared mass percentage content in medicine core are as follows: rutile
33%, zircon sand 2%, high carbon ferromanganese 30%, barium fluoride 6%, almag 2.5%, ferrosilicon 6%, ferrotianium 5%, rare earth ferrosilicon
2%, nickel powder 10%, surplus is iron powder.
7. low temperature unimach flux-cored wire as claimed in claim 2, it is characterised in that: the quality of the medicine core is medicine
The 14% of core welding wire gross mass, the ingredient of the medicine core and its shared mass percentage content in medicine core are as follows: rutile
35%, zircon sand 5%, high carbon ferromanganese 26%, barium fluoride 7%, almag 3%, ferrosilicon 5.5%, ferrotianium 6.5%, rare earth silicon
Iron 2.5%, nickel powder 8.5%, surplus are iron powder.
8. such as the described in any item low temperature unimach flux-cored wires of claims 1 or 2, it is characterised in that: the carbon steel
Crust is SPCC steel band.
9. the welding method of application low temperature unimach flux-cored wire as described in any one of claims 1 to 8, feature
Be: welding condition is protective gas CO2Purity 99.95%, 230~250A of welding current, 26~28V of weldingvoltage, welding
Speed 30mm/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610629232.2A CN106041363B (en) | 2016-08-03 | 2016-08-03 | A kind of low temperature unimach flux-cored wire |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610629232.2A CN106041363B (en) | 2016-08-03 | 2016-08-03 | A kind of low temperature unimach flux-cored wire |
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| CN106041363A CN106041363A (en) | 2016-10-26 |
| CN106041363B true CN106041363B (en) | 2019-02-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106825992B (en) * | 2017-01-20 | 2019-06-04 | 武汉铁锚焊接材料股份有限公司 | A kind of 620MPa grade low-temp steel flux-cored wire and its welding method |
| CN110202290B (en) * | 2019-05-29 | 2021-06-11 | 武汉铁锚焊接材料股份有限公司 | Flux-cored wire for high-strength weathering steel and application thereof |
| CN110625298B (en) * | 2019-11-06 | 2021-07-27 | 山东聚力焊接材料有限公司 | Welding wire flux-cored material with crack resistance and air hole resistance, welding wire and preparation method thereof |
| CN111761254B (en) * | 2020-06-29 | 2022-01-28 | 中国船舶重工集团公司第七二五研究所 | Seamless flux-cored wire for welding ocean engineering high-strength steel |
| CN112453756B (en) * | 2020-11-19 | 2022-11-29 | 天津大桥金属焊丝有限公司 | High-strength and high-toughness gas-shielded flux-cored wire |
| CN112719691B (en) * | 2020-12-22 | 2022-08-16 | 四川大西洋焊接材料股份有限公司 | Flux-cored wire, flux-cored wire and preparation method and application thereof |
| CN112917044B (en) * | 2021-02-03 | 2022-09-06 | 武汉铁锚焊接材料股份有限公司 | 550 MPa-level flux-cored wire with excellent moisture resistance |
| CN112935614B (en) * | 2021-03-08 | 2022-09-09 | 山东聚力焊接材料有限公司 | Metal powder type flux-cored wire and application and preparation method thereof |
| CN114346517B (en) * | 2022-01-20 | 2023-05-02 | 上海工程技术大学 | High-heat-dissipation high-strength steel gas flux-cored wire for overheat-resistant surfacing |
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| CN106041363A (en) | 2016-10-26 |
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