CN110142529A - Super-duplex stainless steel gas shielded welding flux-cored wire and preparation method thereof - Google Patents
Super-duplex stainless steel gas shielded welding flux-cored wire and preparation method thereof Download PDFInfo
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- CN110142529A CN110142529A CN201910359667.3A CN201910359667A CN110142529A CN 110142529 A CN110142529 A CN 110142529A CN 201910359667 A CN201910359667 A CN 201910359667A CN 110142529 A CN110142529 A CN 110142529A
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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
- B23K35/02—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
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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
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
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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
- B23K35/40—Making wire or rods for soldering or welding
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Abstract
A kind of super-duplex stainless steel gas shielded welding flux-cored wire and preparation method thereof.The flux-cored wire is made of external application steel band and medicinal powder, and external application steel band is the austenic stainless steel belt that chromium content is 17.0%~18.0%, nickel content is 11.0%~12.5%;By weight percentage, component and content contained by medicinal powder are as follows: chromium powder 36.0%~38.0%, high nitrogen ferrochrome 9.0%~13.0%, electrolytic manganese metal 2.5%~3.0%, molybdenum powder 4.0%~5.0%, ferrosilicon 0.5%~1.0%, ferrotianium 1.0%~1.5%, almag 0.5%~1.0%, rutile 18.0%~20.0%, quartz 1.0%~2.0%, zircon sand 5.0%~6.0%, potassium feldspar 1.0%~1.5%, albite 3.0%~3.5%, fluorite 1.0%~1.5%, sodium cryolite 0.5%~1.0%, potassium titanate 1.0%~1.5%, bismuth oxide 0.1%~0.3%, remaining is iron powder.The present invention can guarantee the equilibrium of the ingredient and two-phase proportion of deposited metal, obtain that forming quality is good, duplex stainless steel welded joints of fine corrosion resistance.
Description
Technical field
The present invention relates to a kind of super-duplex stainless steel gas shielded welding flux-cored wires and preparation method thereof, belong to material
Expect the welding field of process engineering.
Background technique
Two phase stainless steel is China's development of iron & steel industry " crucial special steel kind ", ferritic phase and Ovshinsky in microscopic structure
Body mutually respectively account for about 50%, making it both has the excellent in toughness of austenitic stainless steel, also with ferritic stainless steel high intensity and
Anti-chlorine ion corrosion performance has been more and more widely used in fields such as ocean structure, petrochemical industry, purged with fresh water.
The development of two phase stainless steel is after three generations.First generation two phase stainless steel is developed with middle 1960s Sweden
3RE60 steel is representative, can be used for anti-chlorine ion stress corrosion environment, but the extremely difficult guarantee that balances each other of welding point.The second generation is double
Phase stainless steel is generated from the 1970s, have Ultra-low carbon and nitrogenous feature, represents the trade mark as SAF2205, resistance to point
Losing index is 32~36.Third generation two phase stainless steel is the Ultra-low carbon (≤0.03%) of development the late 1980s, high molybdenum
The super-duplex stainless steel of (> 3.5%), high nitrogen (0.22%~0.30%) content, the index of resistance to spot corrosion are greater than 40, especially suitable
For being on active service under marine corrosion environment.
Since super-duplex stainless steel exploitation, since they are having both the same of excellent mechanical property and high corrosion-resistant
When, compared with the super austenitic stainless steel and nickel-bass alloy material that possess similar performance, and there is cost advantage, in corrosion ring
The extremely harsh field in border, the application in the industry such as ocean structure, deep-marine-environment increase rapidly.
Welding is one of the key technology of super-duplex stainless steel application, and the performance of connector is to influence stainless steel structure entirety
The key factor of safety.The technical bottleneck that super-duplex stainless steel promotes and applies is the corrosion resistance and base material gold of welding point
Belonging to and mismatching, welding point is the weak link of stainless steel welded structure, and corrosion failure first will occur for connector in a corrosive environment,
So as to cause structure global failure, causes the corrosion resistance of super-duplex stainless steel that can give full play to, cause great deal of steel
Waste.
Documents and materials are not studies have shown that add welding material in welding, using the effect of welding heat source, fusing or melting
The solidification cooling of super-duplex stainless steel base metals can form welding point, but the austenite content of weld seam is only 30% or so,
Its corrosion resistance can significantly reduce;Being passed through nitrogen in the welding process can be improved the austenite content of weld metal, but due to nitrogen
From protective gas, transfer coefficient depends on nitrogen degree of ionization in the welding process and nitrogen in welding pool
Solubility, be affected by welding condition, the chemical component and two-phase proportion of weld metal are not easy accurately to control.Cause
This, welds super-duplex stainless steel using dedicated super-duplex stainless steel phase welding material, is to guarantee that welding point is corrosion-resistant
The maximally efficient measure of performance.
Summary of the invention
The purpose of the present invention is to provide a kind of super-duplex stainless steel gas shielded welding flux-cored wires, pass through improvement
The chemical component of flux-cored wire external application steel band and the composition of medicinal powder, to guarantee austenite and ferrite two-phase proportion in deposited metal
Equilibrium, to guarantee welding point corrosion resistance.On this basis, the present invention can also advanced optimize with while guarantee
Welding wire has good welding technological properties, to obtain, forming quality is good, super-duplex stainless steel of fine corrosion resistance
Welding point.
Another object of the present invention is to provide a kind of preparation methods of flux-cored wire, due to super-duplex stainless steel
The content of gas shielded welding medicine core soldering wire alloy element be higher than common stainless steel welding wire, need by regulation manufacturing process with
Realize the manufacture of thin diameter, high alloy content flux-cored wire.
To achieve the above object, the invention adopts the following technical scheme:
A kind of super-duplex stainless steel gas shielded welding flux-cored wire, is made of external application steel band and medicinal powder, wherein institute
Stating external application steel band is the austenic stainless steel belt that chromium content is 17.0%~18.0%, nickel content is 11.0%~12.5%;It presses
Weight percent meter, component and content contained by medicinal powder are as follows: chromium powder 36.0%~38.0%, high nitrogen ferrochrome 9.0%~13.0%, electricity
Solve manganese metal 2.5%~3.0%, molybdenum powder 4.0%~5.0%, ferrosilicon 0.5%~1.0%, ferrotianium 1.0%~1.5%, magnalium
Alloy 0.5%~1.0%, rutile 18.0%~20.0%, quartzy 1.0%~2.0%, zircon sand 5.0%~6.0%, potassium
Feldspar 1.0%~1.5%, albite 3.0%~3.5%, fluorite 1.0%~1.5%, sodium cryolite 0.5%~1.0%, titanium
Sour potassium 1.0%~1.5%, bismuth oxide 0.1%~0.3%, remaining is iron powder.
Flux-cored wire as described above, it is preferable that the relation with contents of chromium powder and high nitrogen ferrochrome meets 42.5 in the medicinal powder
≤ A+0.6B≤45.5, wherein the weight percent that chromium powder accounts for medicinal powder is A%, and the weight percent that high nitrogen ferrochrome accounts for medicinal powder is
B%.
Flux-cored wire as described above, it is preferable that the size distribution of the medicinal powder are as follows: the medicinal powder of 80~120 mesh granularities accounts for
The 40%~45% of medicinal powder gross weight;The medicinal powder of 120~200 mesh granularities accounts for the 55%~60% of medicinal powder gross weight.
Flux-cored wire as described above, it is preferable that the external application steel band is austenite 316L stainless steel band, specification are as follows:
With a thickness of 0.4 ± 0.02mm, width is 10 ± 0.03mm.
A kind of preparation method of super-duplex stainless steel gas shielded welding flux-cored wire, comprising the following steps:
(1) rutile, potassium feldspar, albite are sieved, particle size range controls within the scope of 80~150 mesh, in 950 DEG C
± 10 DEG C of high temperature bake 60min ± 10min;
(2) quartz, zircon sand, potassium titanate are sieved, particle size range controls within the scope of 100~200 mesh, and in 500
DEG C of ± 10 DEG C high temperature bake 60min ± 10min;
(3) fluorite, sodium cryolite are sieved, particle size range controls within the scope of 120~200 mesh, and in 300 DEG C ± 10
DEG C drying 60min ± 10min;
(4) remaining medicinal powder is sieved, particle size range controls within the scope of 80~200 mesh;
(5) all medicinal powder configure in proportion, in 120 DEG C of ± 10 DEG C of drying 60min ± 10min after being uniformly mixed;
(6) stainless steel band is rolled into U-shaped, the medicine core powder after stirring and drying is added into U-lag;
(7) after U-lag healing up, roll forming, the processing of continuous drawing tube reducing are successively carried out, and machine is carried out to welding wire surface
Tool cleaning, obtains the final products of the flux-cored wire.
The invention has the benefit that
Alloying element content (predominantly chromium, nickel, the nitrogen that the present invention passes through control flux-cored wire external application steel band and medicinal powder
Content), and then control the chemical component and two-phase proportion of welding wire deposited metal.
For nickel element, the present invention makes the nickel element in welding wire deposited metal by the nickel content of rationally control steel band
It all from external application stainless steel band, avoids and adds nickel powder or nickeliferous substance in medicinal powder, improve welding wire deposited metal nickel element
The controllability of content, while reducing the required medicinal powder fill factor of welding wire manufacture, to reduce the difficulty of welding wire production manufacture, this hair
Bright external application steel band is preferably the austenic stainless steel belt that nickel content is 11.0%~12.5%, the nickel content of welding wire deposited metal
Preferably 9.0%~10.5%.
For nitrogen, nitrogen is the important element of super-duplex stainless steel flux-cored wire, and source is welding wire medicine
High nitrogen ferrochrome in powder.If high nitrogen ferrochrome content is relatively low in medicinal powder, nitrogen will lead to austenite in weld seam as austenizer
Content is too low, corrosion resistance decline, and high nitrogen ferrochrome too high levels in medicinal powder, will lead to and generates stomata in weld seam, reduces weldering
Connect quality.The content B% of high nitrogen ferrochrome is 9.0%~13.0% in the preferred medicinal powder of the present invention, to guarantee welding wire deposited metal
Nitrogen content is preferably 0.20%~0.30%.
In preferred deposited metal after nickel content, chromium need to control its containing in deposited metal as ferritisey
Amount, to guarantee the equilibrium of austenite and ferrite two-phase proportion in deposited metal.In preferred deposited metal nickel element content
In the case of, when chromium content is excessively high, ferritic solid solubility temperature is reduced, and is not only caused molten bath high-temperature residence time to increase, is easily led
Coarse grains are caused, and austenite is precipitated in lower temperature in welding pool, will cause austenite amount of precipitation mistake in deposited metal
It is low, it is unfavorable for guaranteeing that two-phase proportion is balanced.When chromium content is too low, the intensity of Yi Yinqi deposited metal declines.The present invention passes through
Welding wire external application steel band, the chromium powder in medicinal powder and high nitrogen ferrochrome are to deposited metal transition chromium, the preferred external application austenite of the present invention
The chromium content of stainless steel belt is 17.0%~18.0%, and the content A% of chromium powder is preferably 36.0%~38.0% in medicinal powder.By
It is 60.0~65.0% in the chrome content of high nitrogen ferrochrome, therefore the present invention further preferably A+0.6B makes its control 42.5~45.5
In range, to guarantee that the chromium content of welding wire deposited metal is preferably 24.0%~26.0%.
Require have a certain amount of nitrogen, usually less than 0.2% in super-duplex stainless steel flux-cored wire deposited metal.In order to
Guarantee the nitrogen content in deposited metal, the present invention is added to suitable ferrotianium in medicinal powder, not merely with the strong deoxidation of titanium elements
Effect also utilizes the strong binding force of titanium elements and nitrogen, improves the nitrogen fixing capacity of deposited metal.In currently preferred medicinal powder
Ferrotianium content is 1.0%~1.5%, when ferrotianium content is more than 1.5%, deteriorates the welding technological properties of welding wire instead, increases
Spatter.
For the stability for guaranteeing welding wire welding usability, need to control the uniformity of medicinal powder filling.Medicinal powder, which is uniformly filled, to be needed
It to be realized by the cavity volume that the apparent density and steel band for controlling medicinal powder are healed up.Medicinal powder granularity is the weight for influencing its apparent density
Factor is wanted, when medicinal powder granularity is less than normal, the apparent density of medicinal powder is reduced, mobility decline, it will filling needed for leading to welding wire
Coefficient increases and filling is uneven, and drawing welding wire tube reducing is difficult;When medicinal powder granularity is bigger than normal, bulky grain medicinal powder easily hinders subsequent medicine
The filling of powder, and bulky grain medicinal powder is difficult to compression flow therewith in tube reducing, and fracture of wire phenomenon is caused frequently to occur.The present invention is rationally controlled
The granularity for having made each component in medicinal powder is collocated with each other mixed medicinal powder large or fine granule, increases medicinal powder pine dress to greatest extent
Density and mobility.Currently preferred medicinal powder granularity size distribution are as follows: the medicinal powder of 80~120 mesh granularities accounts for medicinal powder gross weight
40%~45%;The medicinal powder of 120~200 mesh granularities accounts for the 55%~60% of medicinal powder gross weight.Correspondingly, width of steel band and thickness are inclined
Difference is the important parameter for influencing cavity volume after it heals up, when width of steel band is excessive or thickness is too small, cavity volume after healing up
Become larger, play easily occurs for drawing tube reducing traditional Chinese medicine powder, and medicinal powder fill factor is caused to fluctuate;When width of steel band is too small or thickness is excessive
When, cavity volume becomes smaller after healing up, and the asynchronous flowing of steel band medicinal powder occurs in subsequent drawing tube reducing, will lead to medicinal powder filling
Coefficient suddenly increases or fracture of wire phenomenon.Currently preferred external application stainless steel band dimensional tolerance be thickness ± 0.02mm, width ±
0.03mm。
The acidity that welding wire slag system is suitably reduced in the formula system of flux-cored wire of the present invention, make it between metatitanic acid type slag system and
Between neutral slag system, the excellent flux-cored wire of welding technological properties is obtained, quality of weld seam molding is good, pore-free, crackle, slag inclusion etc.
Metallurgical imperfection can be used for the 100%CO of super-duplex stainless steel2Gas shield all-position welding.
Specific embodiment
In super-duplex stainless steel gas shielded welding flux-cored wire of the invention, flux-cored wire external application steel band is chromium
The austenic stainless steel belt that content is 17.0%~18.0%, nickel content is 11.0%~12.5%, specification be thickness 0.4 ±
0.02mm, width is 10 ± 0.03mm, to built-up welding deposited metal transition nickel element, chromium and molybdenum element.
Contained component and the content of each component in medicinal powder (medicine core powder) are as follows: chromium powder 36.0%~38.0%, high nitrogen ferrochrome
9.0%~13.0%, electrolytic manganese metal 2.5%~3.0%, molybdenum powder 4.0%~5.0%, ferrosilicon 0.5%~1.0%, ferrotianium
1.0%~1.5%, almag 0.5%~1.0%, rutile 18.0%~20.0%, quartzy 1.0%~2.0%, zirconium English
Sand 5.0%~6.0%, potassium feldspar 1.0%~1.5%, albite 3.0%~3.5%, fluorite 1.0%~1.5%, sodium ice crystal
Stone 0.5%~1.0%, potassium titanate 1.0%~1.5%, bismuth oxide 0.1%~0.3%, remaining is iron powder.Medicinal powder preferably accounts for weldering
The 22.0%~23.0% of silk total weight.
Wherein, the composition of the welding wire medicinal powder and its main function are as follows:
Chromium powder: the transition chromium into welding wire deposited metal, content A% (weight percent i.e. in medicinal powder, below
It together) is 36.0%~38.0%.
High nitrogen ferrochrome: the nitrogen content of high nitrogen ferrochrome is 10.0%~12.0%, and chrome content is 60.0~65.0%, to welding wire
Transition chromium and nitrogen in deposited metal.The content B% of high nitrogen ferrochrome is 9.0%~13.0% in medicinal powder.
And chromium powder and high nitrogen ferrochrome content preferably satisfy condition: 42.5≤A+0.6B≤45.5 in medicinal powder.
Electrolytic manganese metal: the transition manganese element into welding wire deposited metal, and play deoxidation, desulfidation, content 2.5%
~3.0%.
Molybdenum powder: the transition molybdenum element into welding wire deposited metal, content are 4.0%~5.0%.
Ferrosilicon: the appropriate transition element silicon into welding wire deposited metal, and combine slag making with manganese element, content 0.5%
~1.0%.
Ferrotianium: mainly playing deoxidation and nitrogen fixation, and content is 1.0%~1.5%.
Almag: deoxidation, and slag making is participated in, content is 0.5%~1.0%.
Rutile: main slag former can improve the removability of slag and forming quality of weld metal, and rutile amount is very few to be led
Cause the covering of welding bead skull incomplete, the decline of molten bath protecting effect, but additional amount excessively reduces the removability of slag instead, and stomata occurs in weld seam
Load mould, content are 18.0%~20.0%.
Quartz: main slag former increases the acidity of slag, adjusts the viscosity and oxidisability of slag, but additional amount is excessive
It will increase oxide inclusion content in deposited metal, reduce quality of weld seam molding, content is 1.0%~2.0%.
Zircon sand: main slag former adjusts the physical and chemical performance of slag, improves the removability of slag of weld metal, improves
Fusing coefficient, content are 5.0%~6.0%.
Potassium feldspar: being mainly used for slag making, improves arc stability, and content is 1.0%~1.5%.
Albite: being mainly used for slag making, improves welding arc stiffness, improves all-position welding, and content is 3.0%~
3.5%.
Fluorite: dehydrogenation increases the anti-stomata ability of weld metal, and content is 1.0%~1.5%.
Sodium cryolite: dehydrogenation increases the mobility of slag, improves the anti-stomata ability of weld metal, and content is 0.5%~
1.0%.
Potassium titanate: stablizing electric arc, and participate in slag making, and content is 1.0%~1.5%.
Bismuth oxide: improving the removability of slag of weld metal, and content is 0.1%~0.3%.
Remaining is iron powder.
The preparation process of super-duplex stainless steel gas shielded welding flux-cored wire of the invention is as follows:
Rutile, potassium feldspar in medicinal powder, albite particle size range are controlled in 80~150 mesh, and in 950 DEG C ± 10 DEG C into
The high temperature baking of row 60min ± 10min is handled;Quartz, zircon sand, potassium titanate particle size range are controlled in 100~200 mesh, and in
500 DEG C of ± 10 DEG C of progress 60min ± 10min high temperature bakings processing;Fluorite, the control of sodium cryolite particle size range are 120~200
Mesh, and in 300 DEG C of ± 10 DEG C of progress 60min ± 10min drying and processings;Remaining medicinal powder particle size range is controlled in 80~200 mesh;It will
All medicinal powder configure in proportion, dry after being uniformly mixed in 120 DEG C of ± 10 DEG C of progress 60min ± 10min, final medicinal powder
Size distribution are as follows: the medicinal powder of 80~120 mesh granularities accounts for the 40%~45% of medicinal powder gross weight;The medicinal powder of 120~200 mesh granularities accounts for medicine
The 55%~60% of powder gross weight.
The austenic stainless steel belt that specification is 0.4mm × 10mm is rolled into U-shaped, after stirring and drying is added into U-lag
Medicine core powder, medicine core powder account for this welding wire total weight 22.0%~23.0%;After U-lag is healed up, successively carry out roll forming,
The processing of continuous drawing tube reducing, and mechanical chipping is carried out to welding wire surface, obtain the super-duplex stainless steel gas shield welding agent
The final products of core welding wire.
Invention is further described in detail by the following examples, but cited embodiment is not limited to this
Invention.
Embodiment 1
Select with a thickness of 0.4mm, austenite 316L stainless steel band that width 10mm, weight are 3347g (main component and
1) specification is shown in Table, rolled into it is U-shaped, by 380g chromium powder, 125g high nitrogen ferrochrome, 30g electrolytic manganese metal, 50g molybdenum powder, 10g ferrosilicon,
15g ferrotianium, 10g almag, 200g rutile, 20g quartz, 60g zircon sand, 15g potassium feldspar, 35g albite, 15g fluorite,
10g sodium cryolite, 15g potassium titanate, 3g bismuth oxide, 7g iron powder, total 1000g medicinal powder, granularity, baking temperature and the time of each medicinal powder
2 are shown in Table, is added in U-type groove after being mixed evenly, filling rate 23.0%, by multiple tracks tube reducing after healing up, finally obtaining diameter is
The finished product welding wire of φ 1.2mm.
Embodiment 2
Select with a thickness of 0.4mm, austenite 316L stainless steel band that width 10mm, weight are 3545g (main component and
1) specification is shown in Table, rolled into it is U-shaped, by 360g chromium powder, 110g high nitrogen ferrochrome, 25g electrolytic manganese metal, 40g molybdenum powder, 5g ferrosilicon,
10g ferrotianium, 5g almag, 180g rutile, 10g quartz, 50g zircon sand, 10g potassium feldspar, 30g albite, 10g fluorite,
5g sodium cryolite, 10g potassium titanate, 1g bismuth oxide, 139g iron powder, total 1000g medicinal powder, the granularity of each medicinal powder, baking temperature are timely
Between be shown in Table 2, after being mixed evenly be added U-type groove in, filling rate 22.0% finally obtains diameter by multiple tracks tube reducing after healing up
For the finished product welding wire of φ 1.6mm.
Embodiment 3
Select with a thickness of 0.4mm, austenite 316L stainless steel band that width 10mm, weight are 3444g (main component and
1) specification is shown in Table, rolled into it is U-shaped, by 370g chromium powder, 120g high nitrogen ferrochrome, 27g electrolytic manganese metal, 45g molybdenum powder, 7g ferrosilicon,
12g ferrotianium, 8g almag, 190g rutile, 15g quartz, 55g zircon sand, 12g potassium feldspar, 33g albite, 12g fluorite,
8g sodium cryolite, 13g potassium titanate, 2g bismuth oxide, 71g iron powder, total 1000g medicinal powder, granularity, baking temperature and the time of each medicinal powder
2 are shown in Table, is added in U-type groove after being mixed evenly, filling rate 22.5%, by multiple tracks tube reducing after healing up, finally obtaining diameter is
The finished product welding wire of φ 1.6mm.
Embodiment 4
Select with a thickness of 0.4mm, austenite 316L stainless steel band that width 10mm, weight are 3545g (main component and
1) specification is shown in Table, rolled into it is U-shaped, by 380g chromium powder, 90g high nitrogen ferrochrome, 30g electrolytic manganese metal, 42g molybdenum powder, 6g ferrosilicon,
13g ferrotianium, 10g almag, 195g rutile, 18g quartz, 58g zircon sand, 12g potassium feldspar, 33g albite, 12g fluorite,
10g sodium cryolite, 15g potassium titanate, 2g bismuth oxide, 74g iron powder, total 1000g medicinal powder, the granularity of each medicinal powder, baking temperature are timely
Between be shown in Table 2, after being mixed evenly be added U-type groove in, filling rate 22.0% finally obtains diameter by multiple tracks tube reducing after healing up
For the finished product welding wire of φ 1.2mm.
Embodiment 5
Select with a thickness of 0.4mm, austenite 316L stainless steel band that width 10mm, weight are 3347g (main component and
1) specification is shown in Table, rolled into it is U-shaped, by 360g chromium powder, 130g high nitrogen ferrochrome, 26g electrolytic manganese metal, 42g molybdenum powder, 7g ferrosilicon,
13g ferrotianium, 8g almag, 185g rutile, 12g quartz, 55g zircon sand, 13g potassium feldspar, 30g albite, 15g fluorite,
5g sodium cryolite, 15g potassium titanate, 3g bismuth oxide, 81g iron powder, total 1000g medicinal powder, granularity, baking temperature and the time of each medicinal powder
2 are shown in Table, is added in U-type groove after being mixed evenly, filling rate 23.0%, by multiple tracks tube reducing after healing up, finally obtaining diameter is
The finished product welding wire of φ 1.2mm.
Comparative example 1
Select with a thickness of 0.4mm, austenite 316L stainless steel band that width 10mm, weight are 3545g (main component and
1) specification is shown in Table, rolled into it is U-shaped, by 420g chromium powder, 110g high nitrogen ferrochrome, 25g electrolytic manganese metal, 40g molybdenum powder, 5g ferrosilicon,
10g ferrotianium, 5g almag, 180g rutile, 10g quartz, 50g zircon sand, 10g potassium feldspar, 30g albite, 10g fluorite,
5g sodium cryolite, 10g potassium titanate, 1g bismuth oxide, 79g iron powder, total 1000g medicinal powder, granularity, baking temperature and the time of each medicinal powder
2 are shown in Table, is added in U-type groove after being mixed evenly, filling rate 22.0%, by multiple tracks tube reducing after healing up, finally obtaining diameter is
The finished product welding wire of φ 1.2mm.
Comparative example 2
Select with a thickness of 0.4mm, austenite 316L stainless steel band that width 10mm, weight are 3545g (main component and
1) specification is shown in Table, rolled into it is U-shaped, by 380g chromium powder, 150g high nitrogen ferrochrome, 30g electrolytic manganese metal, 42g molybdenum powder, 6g ferrosilicon,
15g ferrotianium, 10g almag, 195g rutile, 18g quartz, 58g zircon sand, 12g potassium feldspar, 33g albite, 12g fluorite,
10g sodium cryolite, 15g potassium titanate, 2g bismuth oxide, 12g iron powder, total 1000g medicinal powder, the granularity of each medicinal powder, baking temperature are timely
Between be shown in Table 2, after being mixed evenly be added U-type groove in, filling rate 22.0% finally obtains diameter by multiple tracks tube reducing after healing up
For the finished product welding wire of φ 1.6mm.
Comparative example 3
Select with a thickness of 0.4mm, austenite 316L stainless steel band that width 10mm, weight are 3444g (main component and
1) specification is shown in Table, rolled into it is U-shaped, by 370g chromium powder, 120g high nitrogen ferrochrome, 27g electrolytic manganese metal, 45g molybdenum powder, 7g ferrosilicon,
5g ferrotianium, 8g almag, 190g rutile, 15g quartz, 55g zircon sand, 12g potassium feldspar, 33g albite, 12g fluorite, 8g
Sodium cryolite, 13g potassium titanate, 2g bismuth oxide, 78g iron powder, total 1000g medicinal powder, granularity, baking temperature and the time of each medicinal powder see
Table 2 is added in U-type groove, filling rate 22.5% after being mixed evenly, and by multiple tracks tube reducing after healing up, finally obtaining diameter is φ
The finished product welding wire of 1.6mm.
Comparative example 4
Select with a thickness of 0.4mm, austenite 316L stainless steel band that width 10mm, weight are 3347g (main component and
1) specification is shown in Table, rolled into it is U-shaped, by 360g chromium powder, 130g high nitrogen ferrochrome, 26g electrolytic manganese metal, 42g molybdenum powder, 7g ferrosilicon,
13g ferrotianium, 8g almag, 185g rutile, 12g quartz, 55g zircon sand, 13g potassium feldspar, 30g albite, 15g fluorite,
5g sodium cryolite, 15g potassium titanate, 3g bismuth oxide, 81g iron powder, total 1000g medicinal powder, granularity, baking temperature and the time of each medicinal powder
2 are shown in Table, is added in U-type groove after being mixed evenly, filling rate 23.0%, by multiple tracks tube reducing after healing up, finally obtaining diameter is
The finished product welding wire of φ 1.2mm.
Comparative example 5
Select with a thickness of 0.4mm, austenite 316L stainless steel band that width 10mm, weight are 3347g (main component and
1) specification is shown in Table, rolled into it is U-shaped, by 360g chromium powder, 130g high nitrogen ferrochrome, 26g electrolytic manganese metal, 42g molybdenum powder, 7g ferrosilicon,
13g ferrotianium, 8g almag, 185g rutile, 12g quartz, 55g zircon sand, 13g potassium feldspar, 30g albite, 15g fluorite,
5g sodium cryolite, 15g potassium titanate, 3g bismuth oxide, 81g iron powder, total 1000g medicinal powder, granularity, baking temperature and the time of each medicinal powder
2 are shown in Table, is added in U-type groove after being mixed evenly, filling rate 23.0%, by multiple tracks tube reducing after healing up, finally obtaining diameter is
The finished product welding wire of φ 1.2mm.
Comparative example 6
Select with a thickness of 0.4mm, austenite 316L stainless steel band that width 10mm, weight are 3347g (main component and
1) specification is shown in Table, rolled into it is U-shaped, by 380g chromium powder, 125g high nitrogen ferrochrome, 30g electrolytic manganese metal, 50g molybdenum powder, 10g ferrosilicon,
15g ferrotianium, 10g almag, 200g rutile, 20g quartz, 60g zircon sand, 15g potassium feldspar, 35g albite, 15g fluorite,
10g sodium cryolite, 15g potassium titanate, 3g bismuth oxide, 7g iron powder, total 1000g medicinal powder, granularity, baking temperature and the time of each medicinal powder
2 are shown in Table, is added in U-type groove after being mixed evenly, filling rate 23.0%, by multiple tracks tube reducing after healing up, finally obtaining diameter is
The finished product welding wire of φ 1.6mm.
Comparative example 7
Select with a thickness of 0.4mm, austenite 316L stainless steel band that width 10mm, weight are 3545g (main component and
1) specification is shown in Table, rolled into it is U-shaped, by 360g chromium powder, 110g high nitrogen ferrochrome, 25g electrolytic manganese metal, 40g molybdenum powder, 5g ferrosilicon,
10g ferrotianium, 5g almag, 280g rutile, 10g quartz, 50g zircon sand, 10g potassium feldspar, 30g albite, 10g fluorite,
5g sodium cryolite, 10g potassium titanate, 1g bismuth oxide, 39g iron powder, total 1000g medicinal powder, granularity, baking temperature and the time of each medicinal powder
2 are shown in Table, is added in U-type groove after being mixed evenly, filling rate 22.0%, by multiple tracks tube reducing after healing up, finally obtaining diameter is
The finished product welding wire of φ 1.2mm.
The actual techniques parameter of 1 embodiment and comparative example external application steel band of table
The granularity of 2 embodiment and comparative example medicinal powder each component of table bakes and banks up with earth/drying temperature and time
Evaluation to each embodiment and comparative example performance:
Using 100%CO2Gas shielded arc welding welds flux-cored wire described in embodiment and comparative example, welding condition
Are as follows: welding current 180A, weldingvoltage 27V, speed of welding 20cm/min, gas flow 20L/min, " no according to GB/T17853
Rust steel flux-cored wire " in method prepare welding wire deposited metal.Using GB/T 25776, " welding material welding technological properties is commented
Determine method " evaluation welding wire welding technological properties, using FISCHER ferrite analyzer MP30 test seam cross-section iron element
Body content, every weld seam are surveyed five times, its average value is taken.
The Contrast on effect of each embodiment and comparative example is as shown in table 3.
Can be seen that from the result in table 3 for chromium powder additional amount in medicinal powder is more than 38.0%, and chromium powder and high nitrogen ferrochrome account for
The weight percent A+0.6B of medicinal powder is greater than 45.5 comparative example 1, and the content of chromium is high in deposited metal, and chromium nickel is than big, group
It knits middle ferrite content and reaches 65.4%, will lead to corrosion resistant performance decline.It is more than 13.0% for high nitrogen ferrochrome content in medicinal powder
Comparative example 2, the nitrogen content in medicinal powder is excessively high, and nitrogen is difficult to all be dissolved in weld(ing) deposit, and weld seam will generate nitrogen
Stomata reduces welding quality.It is lower than 1.0% comparative example 3 for ferrotianium content in medicinal powder, titanium elements rise de- in the welding process
Oxygen and nitrogen fixation, the reduction of content will lead to nitrogen element content in deposited metal and decline, and austenite content reduces in tissue,
Ferrite content increases, and is unfavorable for guaranteeing corrosion resistance.It is lower than 11.0% comparative example 4, welding wire for nickel content in steel band
Nickel content is relatively low in deposited metal, and austenite content reduces in tissue, and ferrite content increases, corrosion resistance decline.For
External application width of steel band is more than the comparative example 5 of 10.03mm, and the volume that cavity is formed after steel band joint close increases, and medicinal powder is easily in the cavities
Play causes medicinal powder fill factor to fluctuate, causes welding arc unstable, and spatter increases, and deteriorates the welding procedure of welding wire
Performance.Do not carry out baking and banking up with earth the comparative example 6 of processing, the more chemical combination that the minerals powder in medicinal powder contains as required for medicinal powder
Water, the crystallization water adsorb water, and the water content in medicinal powder is excessive, causes welding arc unstable in welding process, and easily produce in weld seam
Angry hole;Secondly medicinal powder does not carry out granularity control as required, and granular size is uneven, and coarse granule increases drawing tube reducing difficulty, carefully
Particle reduces mobility, causes medicinal powder filling uneven, reduces arc stability, deteriorates welding technological properties.For in medicinal powder
Rutile content is more than 22.0% comparative example 7, and the slag making constituent element in medicinal powder is excessive, and the fusing point of skull increases, in cooling procedure
There is the phenomenon that skull first solidifies, welding pool cannot flow freely due to being limited by solidification skull, will deteriorate weld seam table
Face forming quality reduces de- slag rate, is in addition also easy to produce oxide in deposited metal and is mingled with, its corrosion resistance is caused to decline.
The made flux-cored wire of the present invention of Examples 1 to 6, welding usability is good, and weld porosity is inclined to low, welding wire deposition
The ferrite content of metal is moderate, and comprehensive performance is significantly better than comparative example 1~7, can be used for super-duplex stainless steel (such as
SUS2507 gas shielded welding).
The welding wire performance evaluation of each embodiment of table 3 and comparative example
Claims (7)
1. a kind of super-duplex stainless steel gas shielded welding flux-cored wire, is made of, feature exists external application steel band and medicinal powder
In the external application steel band is the austenitic stainless steel that chromium content is 17.0%~18.0%, nickel content is 11.0%~12.5%
Band;By weight percentage, component and content contained by medicinal powder are as follows: chromium powder 36.0%~38.0%, high nitrogen ferrochrome 9.0%~
13.0%, electrolytic manganese metal 2.5%~3.0%, molybdenum powder 4.0%~5.0%, ferrosilicon 0.5%~1.0%, ferrotianium 1.0%~
1.5%, almag 0.5%~1.0%, rutile 18.0%~20.0%, quartzy 1.0%~2.0%, zircon sand 5.0%
~6.0%, potassium feldspar 1.0%~1.5%, albite 3.0%~3.5%, fluorite 1.0%~1.5%, sodium cryolite 0.5%
~1.0%, potassium titanate 1.0%~1.5%, bismuth oxide 0.1%~0.3%, remaining is iron powder.
2. flux-cored wire according to claim 1, which is characterized in that the medicinal powder account for welding wire total weight 22.0%~
23.0%.
3. flux-cored wire according to claim 1, which is characterized in that the content of chromium powder and high nitrogen ferrochrome is closed in the medicinal powder
System meets 42.5≤A+0.6B≤45.5, and the weight percent that wherein chromium powder accounts for medicinal powder is A%, and high nitrogen ferrochrome accounts for the weight of medicinal powder
Percentage is B%.
4. flux-cored wire according to claim 1, which is characterized in that the size distribution of the medicinal powder are as follows: 80~120 mesh grains
The medicinal powder of degree accounts for the 40%~45% of medicinal powder gross weight;The medicinal powder of 120~200 mesh granularities accounts for the 55%~60% of medicinal powder gross weight.
5. flux-cored wire according to claim 1, which is characterized in that the external application steel band is austenite 316L stainless steel
Band.
6. flux-cored wire according to claim 1, which is characterized in that the specification of the external application steel band are as follows: with a thickness of 0.4 ±
0.02mm, width are 10 ± 0.03mm.
7. the preparation method of flux-cored wire described in a kind of any one of claim 1-6, which comprises the following steps:
(1) rutile, potassium feldspar, albite are sieved, particle size range controls within the scope of 80~150 mesh, in 950 DEG C ± 10
DEG C high temperature bakes 60min ± 10min;
(2) by quartz, zircon sand, potassium titanate be sieved, particle size range control within the scope of 100~200 mesh, and in 500 DEG C ±
10 DEG C of high temperature bake 60min ± 10min;
(3) fluorite, sodium cryolite are sieved, particle size range controls within the scope of 120~200 mesh, and in 300 DEG C of ± 10 DEG C of bakings
Dry 60min ± 10min;
(4) remaining medicinal powder is sieved, particle size range controls within the scope of 80~200 mesh;
(5) all medicinal powder configure in proportion, in 120 DEG C of ± 10 DEG C of drying 60min ± 10min after being uniformly mixed;
(6) stainless steel band is rolled into U-shaped, the medicine core powder after stirring and drying is added into U-lag;
(7) after U-lag healing up, roll forming, the processing of continuous drawing tube reducing are successively carried out, and welding wire surface is carried out mechanical clear
Reason, obtains the final products of the flux-cored wire.
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