CN1626308A - Metal fusing agent fiiled filler rod for high tension steel having exellent welding performence - Google Patents

Metal fusing agent fiiled filler rod for high tension steel having exellent welding performence Download PDF

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Publication number
CN1626308A
CN1626308A CNA2004100984257A CN200410098425A CN1626308A CN 1626308 A CN1626308 A CN 1626308A CN A2004100984257 A CNA2004100984257 A CN A2004100984257A CN 200410098425 A CN200410098425 A CN 200410098425A CN 1626308 A CN1626308 A CN 1626308A
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Prior art keywords
oxide
content
comparative examples
welding
slag
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CNA2004100984257A
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CN1296174C (en
Inventor
李善一
姜鍊玟
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Gaolirong Jieba Co ltd
Qiswill Holdings Co ltd
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Kiswel Ltd
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Classifications

    • 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
    • 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
    • B23K35/24—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
    • 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 invention relates to a metal-based flux cored wire for high tensile steel, a flux cored wire excellent in welding performance. The flux composition contains 1.00-5.00% Ti and Ti oxide in terms of TiO<SB>2</SB>, 1.00-4.00% Si and Si oxide in terms of SiO<SB>2</SB>, 0.10-1.50% Mg and Mg oxide in terms of MgO, 0.20-1.50% Al and Al oxide in terms of Al<SB>2</SB>O<SB>3</SB>, 0.10-1.00% Zr and Zr oxide in terms of ZrO<SB>2</SB>, 1.00-3.50% Mn, 0.50-1.50% Ni; 1.00-4.00% sum of MgO, Al<SB>2</SB>O<SB>3</SB>and ZrO<SB>2</SB>high melting oxides, with the balance total consisting of Fe and minute elements including C, P, S, K<SB>2</SB>O, Na<SB>2</SB>O, Na<SB>2</SB>O<SB>3</SB>, NaF, etc., and inevitable impurities. Assuming that the sum of Mn and Ni among the flux components is Q<SB>1</SB>and that the sum of TiO<SB>2</SB>, SiO<SB>2</SB>, Al<SB>2</SB>O<SB>3</SB>, ZrO<SB>2</SB>and MgO is Q<SB>2</SB>, the ratio of Q<SB>1</SB>/Q<SB>2</SB>fulfills the range of 0.20-1.00 in the composition.

Description

The metal fusing agent filler rod that is used for high tension steel with superior weldability energy
[technical field]
The present invention relates to have the metal fusing agent filler rod that is used for high tension steel of superior weldability energy, relate to proportioning between chemical composition by optimize forming flux and chemical composition in more detail, not only make welding rod have better hot strength and welding performance, and, also can provide the metal fusing agent filler rod that is used for high tension steel of good welding performance and weld shape for downward and H shape fillet (Off イ レ Star ト) welding.
[background technology]
The early stage main 50Kgf/mm that uses 2The metal fusing agent filler rod of level is because various structures intensity improves 60Kgf/mm 2The use of grade steel plate is more and more, so in order to increase work efficiency 60Kgf/mm 2The metal fusing agent filler rod of level begins to popularize.But require 60Kgf/mm now 2The flux filler rod of level hot strength mainly uses slag (Slag).
But, because 60Kgf/mm 2Level slag (Slag) flux filler rod weld sagging and overlapping phenomenon can occur when carrying out the fillet weld of H shape, thus must after welding, handle or repair operation such as welding again, for welding job is made troubles.
[summary of the invention]
The objective of the invention is in order to solve the shortcoming of above-mentioned conventional art, optimize proportioning between the chemical composition of forming flux and chemical composition, make the hot strength of pure weld metal surpass 60Kgf/mm by regulating 2Even the iron plate mother metal is used for 60Kgf/mm 2Situation, also can realize and present 50Kgf/mm 2The equal welding performance of level metal fusing agent filler rod is provided at the metal fusing agent filler rod that is used for high tension steel that aspects such as weld shape, slag separation property, arc stability have the superior weldability energy.
In addition, the present invention also aims to provide not only and can realize good welding performance, and can obtain extraordinary even weld seam, improve the metal fusing agent filler rod that is used for high tension steel of welding job efficient for downward and the fillet weld of H shape.
As shown in table 1, the present inventor has found and has guaranteed that pure weld metal tensile stress is 60Kgf/mm by regulating the content ratio of each constituent of flux and each composition 2Under the situation of level, still can have the method for superior weldability energy, finally propose the present invention downward and the fillet weld of H shape.
Promptly, among the present invention, make the metal fusing agent filler rod by in the crust of making by mild steel or alloy steel material, filling metal fusing agent, provide a kind of have superior weldability can the metal fusing agent filler rod that is used for high tension steel,
With the welding rod gross weight is benchmark, the consisting of of above-mentioned flux:
Be converted into TiO 2The Ti and the content of the oxide of Ti be 1.00～5.00%, be converted into SiO 2The Si and the content of the oxide of Si be 1.00～4.00%, the content that is converted into the oxide of the Mg of MgO and Mg is 0.10～1.50%, be converted into Al 2O 3The Al and the content of the oxide of Al be 0.20～1.50%, be converted into ZrO 2The Zr and the content of the oxide of Zr be 0.10～1.00%, the content of Mn is 1.00～3.50%, the content of Ni is 0.50～1.50%;
Above-mentioned MgO, Al 2O 3, ZrO 2The total content of refractory oxide is 1.00～4.00%, and all the other are all by Fe and C, P, S, K 2O, Na 2O, Na 2O 3, trace element such as NaF and unavoidable impurities form; In addition
For the flux composition that satisfies above-mentioned composition, establish Mn and Ni's and for Q 1, TiO 2, SiO 2, Al 2O 3, ZrO 2And MgO's and be Q 2, Q then 1/ Q 2Ratio in 0.20～1.00 scope.
Below the present invention is described in detail.
[specific embodiment]
The metal fusing agent filler rod that is used for high tension steel of the present invention is made by fill flux in the crust that mild steel or alloy steel material are made.Be elaborated as follows to flux constituent and the effect that constitutes above-mentioned flux filler rod.
Among the present invention, TiO 2Being the composition that formation, separation property and the adjustment of slag viscosity for slag play an important role, is the flux that uses as arc stabilizer, is raw material with rutile (Rutile) and reduced ilmenite (Ilmenite) mainly.
To be converted into TiO among the present invention 2Ti and the addition of the oxide of Ti be limited in 1.00～5.00 weight % scopes to best.This is because if the discontented 1.00 weight % of content, will cause electric arc instability, splash phenomena serious, can not guarantee enough slag amount and separation property.If the opposite 5.00 weight % that surpass for H shape fillet metal solder, will cause to be difficult to regulate slag viscosity, make the slag drippage, form weld sagging and overlapping phenomenon.
SiO among the present invention 2During to downward and the fillet weld of H shape slag is played an important role by bag property and adjusting slag fluidity, also use as arc stabilizer.To be converted into SiO among the present invention 2Si and the addition of the oxide of Si be limited in 1.00～4.00 weight % for best.This is because if the discontented 1.00 weight % of content, will cause that electric arc instability, splash phenomena are serious, slag is inhomogeneous by bag property, the slag separation property descends,, will make the slag drippage if surpass 4.00 weight %, weld shape degenerates, and reduces the slag separation property.
MgO is the flux that can increase slag viscosity, improve weld shape as refractory oxide.If but containing quantity not sufficient 0.10 weight %, slag separation property and weld shape effect of uniform will reduce.If surpass 1.50 weight %, will cause that electric arc instability, splash phenomena are serious, weld shape degenerates.Preferably be limited in 0.10～1.50 weight % so be converted into the addition of the oxide of the Mg of MgO and Mg.
Al 2O 3As refractory oxide, can adjust slag freezing point and viscosity, slag separation property, and the effect of arc stabilizer is arranged.Be converted into Al among the present invention 2O 3Al and the addition of the oxide of Al be limited in 0.20～1.50 weight % for best.This is because if contain quantity not sufficient 0.20 weight %, will reduce slag fluidity, makes the electric arc instability, splash phenomena is serious.If surpass 1.50 weight %, will cause slag fluidity variation, weld shape to degenerate.
ZrO in the present invention 2Have the slag of raising setting rate, viscosity is increased, improve slag effect separatory simultaneously, also have effect as arc stabilizer.If but it contains quantity not sufficient 0.10 weight %, the slag separation property can reduce, and its effect is weakened, if content surpasses 1.00 weight %, will worsen slag fluidity, make weld shape variation, electric arc become unstable, welding job efficient reduces, so be converted into ZrO among the present invention 2Zr and the content of the oxide of Zr preferably be limited in 0.10～1.00 weight %.
Mn has the slag of increasing viscosity, as deoxidier, and improves the flux of metal strength and low-temperature flexibility effect.If but contain quantity not sufficient 1.00 weight %, can be because the insufficient weld part defective that occurs of deoxidation, problems such as intensity and toughness reduction, if content surpasses 3.50 weight %, will in weld metal, form alloy and reinforcement, and the intensity of weld metal is increased, high temperature fracture takes place easily, elongation reduces, so its content preferably is limited in 1.00～3.50 weight % in the present invention.
Ni has the intensity of guaranteeing weld metal and the effect of low-temperature flexibility.If but contain quantity not sufficient 0.50 weight %, will not possess the effect of guaranteeing hot strength and low-temperature flexibility, if content surpasses 1.50 weight %, high temperature fracture takes place easily, be good so content is limited in 0.50～1.50 weight %.
In the above-mentioned flux constituent, MgO, Al 2O 3, ZrO 2The content summation of refractory oxide is preferably in the scope of 1.00～4.00 weight %.If this content summation less than 1.00 weight %, can make slag separation property variation, the welded seam shape loses uniformity, sagging appears, if this content summation surpasses 4.00 weight %, can make slag fluidity variation in the welding, weld seam overlapping phenomenon occurs because of can not fully expanding, and weld shape is inhomogeneous, makes the shape variation.
Feature of the present invention in addition is that the content summation of establishing conventional alloy addition Mn and Ni is Q 1, slag forming agent flux TiO 2, SiO 2, Al 2O 3, ZrO 2And the content summation of MgO is Q 2, then with Q 1/ Q 2Ratio be controlled in 0.20～1.00 the scope.Because each constituent content satisfies above-mentioned condition, not only can provide welding performance (hot strength and the low-temperature flexibility of weld shape, arc stability, slag separation property, weld metal) the good metal fusing agent filler rod that is used for high tension steel, and can make and make even weld and guarantee high strength and good low-temperature flexibility for downward or the fillet weld of H shape.If above-mentioned ratio less than 0.20, weld shape will lose uniformity, though welding efficiency and arc stability may be good, the hot strength of weld metal and low-temperature flexibility will variation; If above-mentioned ratio surpasses 1.00, though the hot strength of weld metal and low-temperature flexibility are good, another side welding efficiency and slag separation property are very poor, and weld shape is also bad.
The welding rod that the present invention relates to contains iron.Occupy maximum ratio in the flux of iron in being filled into the steel crust, can improve arc stability, reduce slag viscosity and slag setting temperature, accelerate speed of welding, improve welding efficiency.Simultaneously, when making welding rod,, can increase the flowability that is filled into the flux in the steel crust, prevent flux filling non-uniform phenomenon making pipe and lead-in wire process.Above-mentioned ferrous components comprises all metallic iron compositions that contain in iron powder and the ferroalloy.
In addition, the welding rod that the present invention relates to also contains C, P, S, K 2O, Na 2O, Na 2O 3, trace element such as NaF and inevitable some impurity.
When being filled into the flux of mentioned component in the crust that mild steel or steel alloy make, the gross weight of flux accounts for 10～20 weight % of welding rod gross weight for best.If less than 10%, packed density are too low, make the interior space of welding rod excessive, the easy filling non-uniform phenomenon that occurs can not be realized uniform welding rod supply problem, if surpass 20% when having welding, it is very thin that crust will become, and it is very high the possibility that welding rod self fractures to occur.
Filling forms for flux has no particular limits; all even antirust in order to guarantee the welding rod surface conductivity; can not toast and handle and interpolation special surface inorganic agent, or toast and handle formation oxide protection mould, or not toast and handle formation Cu coverlay.But the cross sectional shape of welding rod is preferably circular, for interior shape then without any restriction.
Below, the present invention is described in detail by embodiment.The following examples just are used for the present invention is specialized, and are not to limit thought of the present invention.
[embodiment]
In that (KS D 3512 in the crust of SPCC) making, fills the flux account for whole welding rod weight 10～20% and have chemical composition as shown in table 1 below, makes line and directly is the metal fusing agent filler rod of 1.4mm by alloy steel material.
Welding rod to making reaches the fillet weld of H shape downwards, and its welding performance is estimated.Concrete welding condition is as described in Table 2, and the welding performance evaluation result is as shown in table 3.As a reference, the oxide with Ti and Ti is converted into TiO 2, the oxide of Si and Si is converted into SiO 2, the oxide of Mg and Mg is converted into MgO, the oxide of Al and Al is converted into Al 2O 3, the oxide of Zr and Zr is converted into ZrO 2Expression.
Next use 20 tons welding to be mother metal with calendering steel KS SM 570 iron plates, under the condition of 260～320A and 31～34V, according to the KS/AWS standard test procedure hot strength, yield strength and pendulum (the シ ヤ Le ピ one) impact characteristics of weld metal is measured, and its result is illustrated in following table 4.
The evaluation criterion of welding performance is estimated according to very outstanding (◎), outstanding (zero), common (△), bad (*) in the present embodiment.In addition, in order to estimate the toughness intensity of weld metal, stretching hardness is according to AWS standard application 550～690N/mm 2, yield strength is according to KS standard application 490N/mm 2, pendulum (シ ヤ Le ピ one) impact test is carried out at-29 ℃ (more than 27J) according to the AWS standard.
[table 1a]
Project ?T-Fe 1) ?TiO 2 ?SiO 2 ?MgO ?Al 2O 3 ?ZrO 2 ?Mn ?Ni Other composition 2) ?MgO+ ?Al 2O 3?+ZrO 2 ?Q 1/Q 2 3)
Embodiment 1 ?89.21 ?3.31 ?1.69 ?1.07 ?0.79 ?0.20 ?2.47 ?1.06 0.20 ?2.06 ?0.50
Embodiment 2 ?88.62 ?3.30 ?3.74 ?0.24 ?0.31 ?0.87 ?1.46 ?1.00 0.46 ?1.42 ?0.29
Embodiment 3 ?89.59 ?3.28 ?1.98 ?0.27 ?0.65 ?0.61 ?2.30 ?0.98 0.34 ?1.53 ?0.48
Embodiment 4 ?88.09 ?3.72 ?2.10 ?1.41 ?1.27 ?0.79 ?1.87 ?0.52 0.23 ?3.47 ?0.26
Embodiment 5 ?89.42 ?3.72 ?2.10 ?0.34 ?0.63 ?0.21 ?2.30 ?0.99 0.29 ?1.18 ?0.47
Embodiment 6 ?89.59 ?1.37 ?3.20 ?1.21 ?1.37 ?0.23 ?1.47 ?1.42 0.14 ?2.81 ?0.39
Embodiment 7 ?88.61 ?3.47 ?2.06 ?0.97 ?0.92 ?0.84 ?2.06 ?0.82 0.25 ?2.73 ?0.35
Embodiment 8 ?88.45 ?3.49 ?2.08 ?1.39 ?1.42 ?0.93 ?1.17 ?0.76 0.31 ?3.74 ?0.21
Embodiment 9 ?87.91 ?4.60 ?1.24 ?0.87 ?0.31 ?0.79 ?3.24 ?0.61 0.43 ?1.97 ?0.49
Embodiment 10 ?88.86 ?3.39 ?2.21 ?1.34 ?0.89 ?0.37 ?2.01 ?0.69 0.24 ?2.60 ?0.33
Embodiment 11 ?89.79 ?3.36 ?2.10 ?0.67 ?0.62 ?0.40 ?2.02 ?0.79 0.25 ?1.69 ?0.39
Embodiment 12 ?90.68 ?1.87 ?1.54 ?0.34 ?0.24 ?0.57 ?3.14 ?1.21 0.41 ?1.15 ?0.95
Embodiment 13 ?90.09 ?3.40 ?2.02 ?0.50 ?0.62 ?0.40 ?1.82 ?0.79 0.36 ?1.52 ?0.38
Embodiment 14 ?88.95 ?3.14 ?2.78 ?1.09 ?0.67 ?0.24 ?2.14 ?0.74 0.25 ?2.00 ?0.36
[table 1b]
Project ?T-Fe 1) ?TiO 2 ?SiO 2 ?MgO ?Al 2O 3 ?ZrO 2 ?Mn ?Ni Other composition 2) ?MgO+ ?Al 2O 3?+ZrO 2 ?Q 1/Q 2 3)
Comparative Examples 1 ?88.65 ?3.34 ?0.92 ?0.42 ?0.89 ?0.97 ?3.21 ?1.26 ?0.34 ?2.28 ?0.68
Comparative Examples 2 ?86.84 ?5.21 ?2.95 ?0.54 ?0.18 ?0.49 ?2.34 ?1.24 ?0.21 ?1.21 ?0.38
Comparative Examples 3 ?90.54 ?2.31 ?1.42 ?0.13 ?0.27 ?0.15 ?3.42 ?1.37 ?0.39 ?0.55 ?1.12
Comparative Examples 4 ?85.66 ?4.79 ?3.72 ?1.27 ?1.31 ?0.87 ?1.79 ?0.35 ?0.24 ?3.45 ?0.18
Comparative Examples 5 ?88.51 ?2.79 ?4.12 ?0.95 ?0.82 ?0.45 ?0.89 ?1.16 ?0.31 ?2.22 ?0.22
Comparative Examples 6 ?88.62 ?3.89 ?1.56 ?1.62 ?0.64 ?0.21 ?2.46 ?0.76 ?0.24 ?2.47 ?0.41
Comparative Examples 7 ?88.94 ?3.56 ?3.41 ?0.36 ?0.31 ?0.08 ?2.79 ?0.16 ?0.39 ?0.75 ?0.38
Comparative Examples 8 ?87.02 ?4.36 ?2.76 ?0.67 ?1.62 ?0.39 ?1.24 ?1.42 ?0.52 ?2.68 ?0.27
Comparative Examples 9 ?87.50 ?0.87 ?3.89 ?1.47 ?1.66 ?0.91 ?2.46 ?0.76 ?0.48 ?4.04 ?0.37
Comparative Examples 10 ?88.17 ?2.47 ?2.19 ?0.37 ?0.41 ?1.12 ?3.34 ?1.59 ?0.34 ?1.90 ?0.75
Comparative Examples 11 ?90.69 ?1.47 ?1.66 ?0.09 ?0.77 ?0.69 ?3.57 ?0.69 ?0.37 ?1.55 ?0.91
Comparative Examples 12 ?90.69 ?1.86 ?1.67 ?0.26 ?0.23 ?0.48 ?3.14 ?1.28 ?0.39 ?0.97 ?0.98
Comparative Examples 13 ?85.37 ?4.78 ?3.82 ?1.30 ?1.34 ?0.91 ?1.68 ?0.53 ?0.27 ?3.55 ?0.18
Comparative Examples 14 ?90.57 ?1.46 ?1.31 ?0.51 ?0.54 ?0.42 ?3.42 ?1.45 ?0.32 ?1.47 ?1.15
Comparative Examples 15 ?88.09 ?4.87 ?3.98 ?0.48 ?0.31 ?0.16 ?1.16 ?0.57 ?0.38 ?0.95 ?0.18
* go up in the table
1) alloying component and T-Fe, be comprise Fe and alloy powder in the flux of metal sheath composition and.
2) other composition is meant C, P, S, K 2O, Na 2O, Na 2O 3, trace element and unavoidable impurities such as NaF.
3) Q in the formula 1Be Mn and Ni and, and Q 2Be TiO 2, SiO 2, Al 2O 3, ZrO 2And MgO and.
[table 2]
Classification Welding condition
Steel plate ?????????????KS?SM?570
Mother metal thickness ?????????????20mm(t)
Weld polarity Direct current antipolarity (DC+)
Protection gas ?????????????100％CO 2
Protection gas quantity delivered Flow 20l/min
The welding posture Downwards Horizontal fillet
Welding current ????260～280A ????300～320A
Weldingvoltage ????31～32V ????33～34V
Speed of welding ????40cm/min ????40cm/min
Distance between welding wire head-mother metal ????20mm ????20mm
[table 3a]
Project Weld shape Arc stability Slag fluidity The slag separation property Slag is by bag property Splash phenomena
Embodiment 1 ????◎ ????◎ ??○ ????○ ????◎ ????◎
Embodiment 2 ????◎ ????◎ ??○ ????○ ????◎ ????○
Embodiment 3 ????○ ????◎ ??○ ????○ ????◎ ????◎
Embodiment 4 ????◎ ????○ ??◎ ????◎ ????◎ ????◎
Embodiment 5 ????◎ ????◎ ??○ ????○ ????◎ ????○
Embodiment 6 ????◎ ????○ ??◎ ????◎ ????○ ????○
Embodiment 7 ????○ ????◎ ??◎ ????◎ ????◎ ????◎
Embodiment 8 ????◎ ????◎ ??◎ ????○ ????◎ ????◎
Embodiment 9 ????○ ????○ ??◎ ????◎ ????◎ ????◎
Embodiment 10 ????○ ????◎ ??◎ ????◎ ????◎ ????◎
Embodiment 11 ????◎ ????○ ??○ ????○ ????○ ????◎
Embodiment 12 ????○ ????○ ??◎ ????◎ ????○ ????○
Embodiment 13 ????◎ ????◎ ??○ ????◎ ????◎ ????◎
Embodiment 14 ????◎ ????◎ ??◎ ????◎ ????◎ ????◎
[table 3b]
Project Weld shape Arc stability Slag fluidity The slag separation property Slag is by bag property Splash phenomena
Comparative Examples 1 ????△ ????× ????× ????× ????△ ????△
Comparative Examples 2 ????× ????× ????○ ????△ ????○ ????×
Comparative Examples 3 ????× ????△ ????△ ????× ????× ????×
Comparative Examples 4 ????△ ????○ ????△ ????△ ????△ ????○
Comparative Examples 5 ????× ????△ ????× ????× ????○ ????△
Comparative Examples 6 ????× ????× ????× ????× ????△ ????×
Comparative Examples 7 ????× ????○ ????△ ????× ????△ ????△
Comparative Examples 8 ????× ????× ????× ????△ ????○ ????△
Comparative Examples 9 ????× ????△ ????× ????○ ????△ ????×
Comparative Examples 10 ????× ????× ????× ????△ ????△ ????×
Comparative Examples 11 ????× ????△ ????△ ????× ????△ ????○
Comparative Examples 12 ????× ????○ ????○ ????× ????△ ????△
Comparative Examples 13 ????○ ????○ ????△ ????△ ????△ ????△
Comparative Examples 14 ????× ????△ ????△ ????× ????△ ????△
Comparative Examples 15 ????× ????△ ????△ ????× ????× ????△
[table 4a]
Project Hot strength (N/mm 2) Yield strength (N/mm 2) Elongation (%) Pendulum impact value (J)
The KS standard Z3313 YFW-C602M ????≥590 ????≥490 ????≥19 ????≥27 ????(-20℃)
The AWS standard A5.29 E80T1-Ni1 ????550～690 ????≥470 ????≥19 ????≥27 ????(-29℃)
Embodiment 1 ????652 ????564 ????21 ????79
Embodiment 2 ????601 ????534 ????26 ????35
Embodiment 3 ????649 ????519 ????21 ????73
Embodiment 4 ????607 ????542 ????24 ????41
Embodiment 5 ????648 ????546 ????21 ????67
Embodiment 6 ????599 ????511 ????27 ????52
Embodiment 7 ????624 ????539 ????26 ????53
Embodiment 8 ????613 ????541 ????25 ????41
Embodiment 9 ????648 ????543 ????25 ????72
Embodiment 10 ????608 ????541 ????27 ????42
Embodiment 11 ????601 ????516 ????22 ????39
Embodiment 12 ????651 ????524 ????23 ????64
Embodiment 13 ????625 ????531 ????25 ????40
Embodiment 14 ????649 ????543 ????25 ????71
[table 4b]
Project Hot strength (N/mm 2) Yield strength (N/mm 2) Elongation (%) Pendulum impact value (J)
The KS standard Z3313 YFW-C602M ????≥590 ????≥490 ????≥19 ????≥27 ????(-20℃で)
The AWS standard A5.29 E80T1-Ni1 ????550～690 ????≥470 ????≥19 ????≥27 ????(-29℃で)
Comparative Examples 1 ????531 ????501 ????18 ????35
Comparative Examples 2 ????619 ????524 ????21 ????61
Comparative Examples 3 ????643 ????524 ????22 ????46
Comparative Examples 4 ????541 ????514 ????25 ????24
Comparative Examples 5 ????537 ????482 ????26 ????36
Comparative Examples 6 ????631 ????532 ????24 ????54
Comparative Examples 7 ????627 ????546 ????23 ????21
Comparative Examples 8 ????631 ????527 ????22 ????61
Comparative Examples 9 ????629 ????546 ????23 ????43
Comparative Examples 10 ????712 ????632 ????17 ????89
Comparative Examples 11 ????708 ????654 ????18 ????52
Comparative Examples 12 ????633 ????482 ????28 ????50
Comparative Examples 13 ????542 ????547 ????24 ????21
Comparative Examples 14 ????651 ????563 ????23 ????34
Comparative Examples 15 ????679 ????541 ????24 ????46
From last table 3 and table 4 as can be seen, be controlled at embodiment 1～14 in the optimum range for each chemical composition that will form flux and content, not only show good welding performance and weld shape for downward or the fillet weld of H shape, in mechanical-physical test (hot strength, yield strength and pendulum impact test), also can be met the weld metal of KS standard Z3313 YFW-C602M, AWS standard A 5.29E80T1-Ni1 with good impact flexibility.
On the other hand, for in the chemical composition of forming flux a kind or 2 kinds break away from scope provided by the invention, exceed refractory oxide that the present invention proposes and scope or exceed the Comparative Examples 1～15 of mathematical expression 1 scope that the present invention proposes, welding performance is very poor, weld shape is also bad, or fails to satisfy relevant criterion in the mechanical-physical test.
Promptly, Comparative Examples 1 is because of being scaled the SiO of oxide 2Content do not reach requirement of the present invention, so downwards and during the fillet weld of H shape, slag is wrapped inhomogeneous, the slag separation property is also bad, arc stability is also very poor.
The oxide content of Ti is converted into TiO in the Comparative Examples 2 2Surpass 5.0%, cause the slag viscosity adjustment to become difficult, the slag drippage degenerates weld shape, and because Al 2O 3Addition does not reach the scope of requirement of the present invention, so in welding job, cause the electric arc instability, splash phenomena is serious.
On the other hand, for refractory oxide content summation less than 1.0%, the value of the mathematical expression 1 that the present invention provides has surpassed 1.0 Comparative Examples 3, in welding job, slag contains quantity not sufficient, causes weld seam to become inhomogeneous, makes the also non-constant of slag separation property owing to weld seam is bad.Though the mechanical properties value satisfies relevant criterion, welding performance is very bad.
In the Comparative Examples 4, the value of mathematical expression 1 is less than 0.2, though also embody welding performance preferably substantially, hot strength does not satisfy relevant criterion, simultaneously since Ni contain quantity not sufficient 0.5%, low-temperature flexibility does not satisfy relevant criterion yet.
Be converted into the SiO of oxide in the Comparative Examples 5 2Surpassed 4.0% of requirement of the present invention, caused slag drippage to make that weld shape worsens, the slag separation property is bad, simultaneously since Mn contain quantity not sufficient 1.0%, the tensile stress of weld metal does not satisfy relevant criterion.
In the Comparative Examples 6, though satisfied relevant criterion showing aspect the mechanical properties evaluation, surpass 1.50% owing to be converted into the content of the MgO of oxide, cause the electric arc instability, splash phenomena is serious, slag fluidity variation simultaneously, and weld shape is also bad.
In the Comparative Examples 7, the summation of refractory oxide and be converted into the ZrO of Zr oxide 2All do not reach the scope of requirement of the present invention, cause the slag drippage, make weld shape inhomogeneous, weld sagging and overlapping phenomenon appear, the slag separation property is also bad, simultaneously since Ni contain quantity not sufficient 0.5%, low-temperature flexibility also fails to satisfy relevant criterion in the mechanical-physical test.
On the other hand, be converted into the Al of oxide in the Comparative Examples 8 2O 3Content has surpassed 1.5% of requirement of the present invention, causes the slag fluidity variation, and slag can not fully be expanded, and makes weld shape inhomogeneous, overlapping phenomenon occurs.
In addition, in Comparative Examples 9 owing to be converted into the TiO of oxide 2Content causes the arc stability variation less than 1.0% of the present invention's requirement, and splash phenomena is serious, Al 2O 3And refractory oxide and be respectively 1.66% and 4.04%, all exceeded the scope of requirement of the present invention, cause slag fluidity bad, weld shape also degenerates.
In the Comparative Examples 10 owing to be converted into the ZrO of oxide 2Content has exceeded the scope of requirement of the present invention, slag fluidity makes the weld shape variation inadequately well, the electric arc instability, splash phenomena is serious, simultaneously because the Ni content of one of alloy addition is 1.59%, the scope that has exceeded requirement of the present invention causes that hot strength does not satisfy standard yet in the mechanical properties value.
In addition, the MgO content that is converted into oxide in the Comparative Examples 11 does not reach the scope that the present invention requires, cause the slag separation property bad, can not form uniform weld seam, the overlapping phenomenon that weld seam occurs, simultaneously because the content of the Mn of one of alloy addition has exceeded 3.5%, the hot strength relevant criterion of also failing to satisfy aspect mechanical properties.
In addition, MgO, Al in Comparative Examples 12 2O 3, ZrO 2The summation of refractory oxide content does not reach the scope that the present invention requires, and causes the slag separation property bad, and sagging phenomenon also appears in weld seam.
In the Comparative Examples 13, establish Mn and Ni's and for Q 1, establish TiO 2, SiO 2, Al 2O 3, ZrO 2And MgO's and be Q 2, ratio Q 1/ Q 2Do not reach the scope of requirement of the present invention, though weld shape, welding performance and arc stability are better, mechanical properties values such as hot strength and low-temperature flexibility fail to reach the relevant criterion requirement.
In the Comparative Examples 14, establish Mn and Ni's and for Q 1, establish TiO 2, SiO 2, Al 2O 3, ZrO 2And MgO's and be Q 2, ratio Q 1/ Q 2The scope that has surpassed requirement of the present invention, though mechanical properties values such as hot strength and low-temperature flexibility satisfy the relevant criterion requirement, welding performance and slag separation property and weld shape are all bad.
In Comparative Examples 15, establish MgO, Al at last 2O 3, ZrO 2Refractory oxide and and Mn and Ni's and be Q 1, TiO 2, SiO 2, Al 2O 3, ZrO 2And MgO's and be Q 2, because Q 1/ Q 2Ratio do not reach the scope that the present invention requires simultaneously, though hot strength is relative good with mechanical properties values such as low-temperature flexibilities, can confirm that slag separation property, weld shape and welding performance etc. are all bad.
[invention effect]
As mentioned above, the present invention can provide the hot strength of pure weld metal to reach 60Kgf/mm 2, go for 60Kgf/mm 2Grade steel plate has and existing 50Kgf/mm simultaneously 2The metal fusing agent filler rod of the equal welding performance of level metal fusing agent filler rod.
In addition, advantage of the present invention is that the metal fusing agent filler rod that has with the equal welding performance of the slag flux filler rod that was used for high tension steel in the past can be provided, can avoid reaching weld sagging and the overlapping phenomenon that occurs in the fillet weld of H shape downwards, form weld seam uniformly, also showing good service behaviour and obtaining good weld shape downwards and in the fillet weld of H shape.

Claims (1)

1, a kind of have superior weldability can, be used for high tension steel, by filling the metal fusing agent filler rod that metal fusing agent is made at the crust made by mild steel or alloy steel material, it is characterized in that, with the welding rod gross weight is benchmark, the consisting of of above-mentioned flux:
Be converted into TiO 2The Ti and the content of the oxide of Ti be 1.00～5.00%, be converted into SiO 2The Si and the content of the oxide of Si be 1.00～4.00%, the content that is converted into the oxide of the Mg of MgO and Mg is 0.10～1.50%, be converted into Al 2O 3The Al and the content of the oxide of Al be 0.20～1.50%, be converted into ZrO 2The Zr and the content of the oxide of Zr be 0.10～1.00%, the content of Mn is 1.00～3.50%, the content of Ni is 0.50～1.50%;
Above-mentioned MgO, Al 2O 3, ZrO 2The total content of refractory oxide is 1.00～4.00%, and all the other are all by Fe and C, P, S, K 2O, Na 2O, Na 2O 3, trace element such as NaF and unavoidable impurities form; In addition
For the flux composition that satisfies above-mentioned composition, establish Mn and Ni's and for Q 1, TiO 2, SiO 2, Al 2O 3, ZrO 2And MgO's and be Q 2, Q then 1/ Q 2Ratio in 0.20～1.00 scope.
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CN102059476A (en) * 2009-11-17 2011-05-18 株式会社神户制钢所 Hardfacing MIG-arc welding wire and hardfacing MIG-arc welding process
CN113233758A (en) * 2021-06-25 2021-08-10 北京北旭电子材料有限公司 Glass composition, glass raw powder and preparation method thereof, and glass powder and preparation method thereof

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JP5005309B2 (en) 2006-10-02 2012-08-22 株式会社神戸製鋼所 Gas shielded arc welding flux cored wire for high strength steel
CN104588919B (en) * 2014-12-01 2017-03-01 武汉铁锚焊接材料股份有限公司 A kind of supporting flux-cored wire of high-strength bridge steel Q500qE
CN110788519B (en) * 2019-11-20 2021-05-28 桂林航天工业学院 Flux-cored wire for oil and gas conveying pipeline and preparation method thereof

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JPS5823593A (en) * 1981-07-31 1983-02-12 Kobe Steel Ltd Sintered flux for submerged arc welding
JPS59110495A (en) * 1982-12-15 1984-06-26 Nippon Steel Corp Low hydrogen type coated arc welding electrode for fillet welding
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KR0134561B1 (en) * 1993-03-31 1998-06-15 가메다카 소키치 Low-fume flux-cored wire for use in gas-shielded arc welding
JPH10249583A (en) * 1997-03-05 1998-09-22 Nippon Steel Weld Prod & Eng Co Ltd Flux cored wire for gas shielded arc welding
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102059476A (en) * 2009-11-17 2011-05-18 株式会社神户制钢所 Hardfacing MIG-arc welding wire and hardfacing MIG-arc welding process
CN113233758A (en) * 2021-06-25 2021-08-10 北京北旭电子材料有限公司 Glass composition, glass raw powder and preparation method thereof, and glass powder and preparation method thereof

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JP2005169506A (en) 2005-06-30

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