CN107225339B - A kind of self-shield flux-cored wire and preparation method thereof for heavy-duty forging die tool sandwich of layers - Google Patents
A kind of self-shield flux-cored wire and preparation method thereof for heavy-duty forging die tool sandwich of layers Download PDFInfo
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- CN107225339B CN107225339B CN201710408647.1A CN201710408647A CN107225339B CN 107225339 B CN107225339 B CN 107225339B CN 201710408647 A CN201710408647 A CN 201710408647A CN 107225339 B CN107225339 B CN 107225339B
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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
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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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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- Organic Chemistry (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention discloses a kind of self-shield flux-cored wires and preparation method thereof for heavy-duty forging die tool sandwich of layers; the chemical component of medicine core is calculated in mass percent in the flux-cored wire; carbon element content 0.24-0.4%, silicon content 0.2-0.6%, manganese element content 0.8-1.2%, phosphorus element content≤0.02%, sulfur content≤0.02%, chromium content 1.8-2.5%, nickel element content 1.8-2.5%, molybdenum element content 1.2-1.6%; vanadium unit cellulose content 13-18%, surplus are iron and impurity.The present invention provides a kind of self-shield flux-cored wires for heavy-duty forging die tool sandwich of layers; so that sandwich layer material is under the extreme operating condition of high temperature heavy load; the flexible deformation and stress dispersion capacity of sandwich of layers improve, and the bond strength between sandwich of layers and steel casting die matrix and transition zone increases and the Forming Quality and welding usability of sandwich of layers are more preferable.
Description
Technical field
The invention belongs to welding material manufacturing technology fields, and in particular to it is a kind of for heavy-duty forging die tool sandwich of layers from
Protect flux-cored wire and preparation method thereof.
Background technique
China's 80,000 tons of stamp forging hydraulic press of machinery industry dose necessary achievement (maximum stamp forging hydraulic press in the world) are certainly
Since 2013 put into operation, having played in the manufacture of the fields such as aerospace, the energy, ship large size key part can not be replaced
The effect in generation.Cooperate forming is difficult to become 80,000 tons of stamp forging hydraulic press and heavy-duty forging die tool now (single set weight is up to 60~100 tons)
Shape material (such as titanium alloy, high temperature alloy, unimach), at this point, the working region of heavy-duty forging die tool type chamber is in height
Under the extreme operating conditions such as temperature (350-700 DEG C) heavily loaded (40,000 tons or more load), so that the working region pole of heavy-duty forging die tool type chamber
The Problem of Failure such as abrasion, deformation, cracking are also easy to produce, cause heavy-duty forging die tool after forging 2-3 part forging, deformation quantity reaches
10mm or more, so that heavy-duty forging die tool can not continue to use；In addition, since the size that present heavy-duty forging die has is big
(the big 3-6m of single side size of heavy-duty forging die tool, type chamber projected area is up to 3-5 ㎡)；Lead to heavy-duty forging die tool uses the longevity
Order that extremely short, cost is high.
Publication No. CN104741499A at present, patent name are " a kind of sandwich of layers forging die and forging die sandwich of layers built-up welding
The Chinese patent of preparation method " discloses the design method by one layer of sandwich of layers of built-up welding between die matrix and transition zone,
So that allowing sandwich of layers that larger flexible deformation even small plastic deformation occurs under high pressure, by the concentration below mold cavity
The rapid diffusive attenuation of peak stress, and be transmitted on cast steel substrate layer with approaches uniformity distributed stress, to make cast steel substrate institute
The maximum stress received lowers, and cast steel substrate is safer in pressure-bearing, avoids peak stress from directly resulting in cast steel substrate generation and splits
Line, efficiently solve existing heavy-duty forging die tool be easy to happen under conditions of high temperature heavy load severe plastic deformation, cracking,
The technical problems such as the service life is short.
Although proposing to solve large-scale hot forging by way of sandwich of layers is arranged between transition zone and die matrix at present
The short problem of die life, but there is presently no see the report in relation to sandwich layer material correlative study.
Summary of the invention
In view of the above shortcomings of the prior art, the technical problems to be solved by the present invention are: providing a kind of for large-scale heat
The self-shield flux-cored wire of forging mould sandwich of layers solves existing sandwich layer material under the extreme operating condition of high temperature heavy load, folder
The flexible deformation and stress dispersion capacity of central layer are poor, and the bond strength between sandwich of layers and cast steel substrate and transition zone is small and presss from both sides
The technical problem of Forming Quality and the welding technological properties difference of central layer；It additionally provides simultaneously a kind of sandwich for heavy-duty forging die tool
The preparation method of the self-shield flux-cored wire of layer.
In order to solve the above-mentioned technical problem, The technical solution adopted by the invention is as follows:
A kind of self-shield flux-cored wire for heavy-duty forging die tool sandwich of layers, the chemical component of medicine core in the flux-cored wire
Be calculated in mass percent, carbon element content 0.24-0.4%, silicon content 0.2-0.6%, manganese element content 0.8-1.2%,
Phosphorus element content≤0.02%, sulfur content≤0.02%, chromium content 1.8-2.5%, nickel element content 1.8-
2.5%, molybdenum element content 1.2-1.6%, vanadium unit cellulose content 13-18%, surplus are iron and impurity.
In the technical program, a large amount of test has been carried out by the degree to sandwich of layers material component and component,
So that the heavy-duty forging die tool sandwich of layers that the flux-cored wire built-up welding provided through the invention is formed can satisfy in 80,000 tons of die forging liquid
The performance requirement of molding large difficulty deformation forging on press, because vanadium content is 13-18% in the technical program, in sandwich of layers
The middle equally distributed V-C type compound of formation graininess improves thermal stability and toughness；Chrome content is 1.8-2.5%, is formed suitable
The netted Cr-C type carbide of amount, as anti-deforming skeleton；Molybdenum element is carbide, it can not only be with
Chromium, carbon form high-temperature stability and crack resistance that double carbide further increases silk material, additionally it is possible to preferential in molten bath
It is precipitated, Dispersed precipitate thinning microstructure；Nickel is non-carbide forming element, and suitable nickel strengthens matrix, reduces superheated susceptivity, is risen
To the effect of precipitation strength, good toughness is kept while improving the intensity and hardness of steel；Silicon, manganese, carbon are fixed to deoxidation,
Enhance the effect of self-shield；Therefore, so that the sandwich of layers mechanical property at normal temperature that flux-cored wire built-up welding produced by the present invention is formed
Following requirements can be met: yield strength σ s >=750MPa, tension degree σ b >=1000MPa, compressive strength at 400 DEG C >=
750MPa, elongation percentage δ >=25%, shrinking percentage Ψ >=35%, Impact energy Ak v >=40J；So that flux-cored wire heap provided by the invention
The sandwich of layers of shape is welded under the conditions of the extreme operating condition of high temperature (400 DEG C or so) heavily loaded (40,000 tons or more), sandwich of layers can occur
Biggish flexible deformation, and small plastic deformation can only occur for sandwich of layers, or even not be plastically deformed, allow to by
Concentration peak stress (usually wedge shaped, harm is big) rapid diffusive attenuation below heavy-duty forging die tool type chamber, and with approximate equal
Even distributed stress is transmitted on cast steel substrate layer, and protection heavy-duty forging die has integrally-built safety, especially protection mold base
Body will not be damaged, and avoid massive losses；And the hardness of flux-cored wire produced by the present invention is moderate, has good modeling
Property and toughness, while alloy compositions collocation is rationally, forms good transition with cast steel substrate and buffer layer material, so that in the present invention
Sandwich of layers and the bond strength of die matrix and transition zone are high, can effectively be promoted on 80,000 tons of stamp forging hydraulic press under high temperature heavy load
The die-forging forming ability of difficult-to-deformation material.
Preferably, the chemical component of medicine core is calculated in mass percent in the flux-cored wire, carbon element content 0.32%,
Silicon content 0.4%, manganese element content 1.0%, phosphorus element content 0.01%, sulfur content 0.01%, chromium content
2.2%, nickel element content 2.1%, molybdenum element content 1.4%, vanadium unit cellulose content 16%, surplus are iron and impurity.Flux-cored wire
Keep the welding technological properties of flux-cored wire built-up welding more preferable using said ratio, and the sandwich of layers shaped by flux-cored wire built-up welding
Mechanical property it is more preferable, ensure that the mechanical properties such as plasticity, toughness, intensity and the hardness of the flux-cored wire prepared in the present invention more
It is balanced.
System described in any one of claim 1-4 for the self-shield flux-cored wire of heavy-duty forging die tool sandwich of layers
Preparation Method includes the following steps:
1) 1h is respectively dried in raw material at 120 DEG C, using 80 mesh sieve respectively to the various raw material after drying into
Row screening, the raw material after screening are saved backup in the environment of 80 DEG C；Allow to effectively control starting material particle size, makes it
More evenly, the self-shield effect of deoxidier reactivity and Welding Metallurgy process is promoted.
2) raw material are weighed as desired, weighed raw material are added in batch mixer and mix 2h, obtain medicine core powder；
3) after obtaining H08A steel band progress ultrasonic cleaning and drying, the cross section of H08A steel band is processed into U-shaped structure,
Then roll forming is carried out after medicine core powder obtained in step 2) being added in H08A steel band with powder adding machine, then by H08A steel
Band heals up to form flux-cored wire matrix；
4) using wire drawing die will be obtained in step 3) flux-cored wire matrix carry out drawing tube reducing, obtain diameter be 1.6~
The flux-cored wire of 3.2mm.
Preferably, the diameter of flux-cored wire obtained in the step 4) is 2.4mm.
2.4mm is set by the diameter of flux-cored wire, it in this way can be by the surface in heavy-duty forging die tool type chamber
3-5 layers of flux-cored wire of built-up welding can form sandwich of layers, on the one hand avoid that the built-up welding number of plies is very few, lead to the institutional framework of sandwich of layers
It is difficult to control, influences the effect of sandwich of layers；On the other hand, avoid the built-up welding number of plies excessive, the heat affecting for causing sandwich of layers to be subject to is big,
And welding workload is big, built-up welding low efficiency；Therefore, this invention ensures that the toughness and plastic property of sandwich of layers, so that sandwich
While layer is more preferable to the diffusivity of the concentration peak stress below heavy-duty forging die tool type chamber, guarantee sandwich of layers built-up welding efficiency
It is higher.
Compared with prior art, the present invention has the advantage that:
(1) in the technical program, a large amount of examination has been carried out by the degree to sandwich of layers material component and component
It tests, so that mechanical property can satisfy following requirements to the sandwich of layers of flux-cored wire built-up welding produced by the present invention formation at normal temperature:
Yield strength σ s >=750MPa, tension degree σ b >=1000Mpa, compressive strength >=750MPa at 400 DEG C, elongation percentage δ >=25%,
Shrinking percentage Ψ >=35%, Impact energy Ak v >=40J；Therefore, the sandwich of layers of flux-cored wire built-up welding forming provided by the invention is in high temperature
Under the conditions of the extreme operating condition of (400 DEG C or so) heavily loaded (40,000 tons or more), biggish flexible deformation can occur for sandwich of layers, and
Small plastic deformation can only occur for sandwich of layers, or even not be plastically deformed, and allowing to will be under heavy-duty forging die tool type chamber
Concentration peak stress (usually wedge shaped, harm is big) the rapid diffusive attenuation in face, and casting is transmitted to approaches uniformity distributed stress
On steel matrix layer, protection heavy-duty forging die has integrally-built safety.
(2) hardness of flux-cored wire obtained at normal temperature is moderate in the present invention, and component to flux-cored wire and contains
Amount design, so that the welding technological properties in the weld deposit process of flux-cored wire is good, so that formed by flux-cored wire built-up welding
Sandwich of layers has good plasticity and toughness, while making the combination between sandwich of layers difference steel casting die matrix and transition zone strong
Degree reaches 1000MPa or more；The die-forging forming of difficult-to-deformation material under high temperature heavy load on 80,000 tons of stamp forging hydraulic press can effectively be promoted
Ability.
(3) guaranteeing that sandwich of layers is good containing elements such as suitable silicon, manganese in the component of flux-cored wire provided in the present invention
While good toughness and plasticity, also make in the welding process, silicon, manganese in flux-cored wire etc. in the welding process with oxygen
Reaction, therefore do not need to be passed through argon gas or carbon dioxide during the welding process as protective gas, so that flux-cored wire exists
The welding surroundings that the process of welding forms anaerobic can form self-shield effect to the flux-cored wire welded, therefore in medicine core
Silk material is nearly free from oxide skin during built-up welding forms sandwich of layers, and weld seam is beautiful, when also making multiple tracks multi-layer welding not
Scarfing cinder is needed, while improving the efficiency of table folder central layer built-up welding, so that the better quality for the sandwich of layers that built-up welding is formed, so that sandwich
Layer is more preferable to the effect of protection steel casting die matrix.
Specific embodiment
Invention is further described in detail combined with specific embodiments below.Specific medicine core silk described by following embodiments
The proportion of material Chinese medicine core component, process conditions and as a result, in order to preferably explain the present invention, the present invention is protected without constituting
Protect the restriction of range.
Embodiment 1
1) 1h is respectively dried in raw material at 120 DEG C, using 80 mesh sieve respectively to the various raw material after drying into
Row screening, the raw material after screening are saved backup in the environment of 80 DEG C；
2) the medicine core raw material in flux-cored wire: carbon element content 0.32%, silicon content are weighed according to following proportion
0.4%, manganese element content 1%, phosphorus element content 0.01%, sulfur content 0.01%, chromium content 2.2%, nickel element
Content 2.1%, molybdenum element content 1.4%, vanadium unit cellulose content 16%, surplus are iron, and weighed raw material are added to batch mixer
Middle mixing 2h, obtains medicine core powder；
3) after obtaining H08A steel band progress ultrasonic cleaning and drying, the cross section of H08A steel band is processed into U-shaped structure,
Then roll forming is carried out after medicine core powder obtained in step 2) being added in H08A steel band with powder adding machine, then by H08A steel
Band heals up to form flux-cored wire matrix；
4) flux-cored wire matrix will be obtained using wire drawing die in step 3) and carry out drawing tube reducing, obtaining diameter is 2.4mm's
Flux-cored wire.
Sample 1,2,3 is obtained by the built-up welding of sandwich of layers self-shield flux-cored wire 3 times obtained in embodiment 1 respectively；Control weldering
Connecing electric current is 250A, weldingvoltage 28V, speed of welding 0.4m/min.Interlayer welding temperature is controlled at 300 DEG C.To obtaining
Sample 1,2,3 welding technological properties and the mechanical property of sandwich of layers that welding is formed detected to obtain table 1.
Table 1 is the welding technological properties of sample 1,2,3 and the sandwich of layers of flux-cored wire built-up welding 3 times formation in embodiment 1
Mechanical property table
Embodiment 2
1) 1h is respectively dried in raw material at 120 DEG C, using 80 mesh sieve respectively to the various raw material after drying into
Row screening, the raw material after screening are saved backup in the environment of 80 DEG C；
2) the medicine core raw material in flux-cored wire: carbon element content 0.24%, silicon content are weighed according to following proportion
0.2%, manganese element content 0.8%, phosphorus element content 0.01%, sulfur content 0.01%, chromium content 1.8%, nickel member
Cellulose content 1.8%, molybdenum element content 1.2%, vanadium unit cellulose content 13%, surplus are iron, and weighed raw material are added to mixing
2h is mixed in machine, obtains medicine core powder；
3) after obtaining H08A steel band progress ultrasonic cleaning and drying, the cross section of H08A steel band is processed into U-shaped structure,
Then roll forming is carried out after medicine core powder obtained in step 2) being added in H08A steel band with powder adding machine, then by H08A steel
Band heals up to form flux-cored wire matrix；
4) flux-cored wire matrix will be obtained using wire drawing die in step 3) and carry out drawing tube reducing, obtaining diameter is 2.4mm's
Flux-cored wire.
Sample 4,5,6 is obtained by the built-up welding of sandwich of layers self-shield flux-cored wire 3 times obtained in embodiment 2 respectively；Control weldering
Connecing electric current is 250A, weldingvoltage 28V, speed of welding 0.4m/min.Interlayer welding temperature is controlled at 300 DEG C.To obtaining
Sample 4,5,6 welding technological properties and the mechanical property of sandwich of layers that welding is formed detected to obtain table 2.
Table 2 is the welding technological properties of sample 4,5,6 and the sandwich of layers of flux-cored wire built-up welding 3 times formation in embodiment 2
Mechanical property table
Embodiment 3
1) 1h is respectively dried in raw material at 120 DEG C, using 80 mesh sieve respectively to the various raw material after drying into
Row screening, the raw material after screening are saved backup in the environment of 80 DEG C；
2) the medicine core raw material in flux-cored wire: carbon element content 0.4%, silicon content are weighed according to following proportion
0.6%, manganese element content 1.2%, phosphorus element content 0.01%, sulfur content 0.01%, chromium content 2.5%, nickel member
Cellulose content 2.5%, molybdenum element content 1.6%, vanadium unit cellulose content 18%, surplus are iron, and weighed raw material are added to mixing
2h is mixed in machine, obtains medicine core powder；
3) after obtaining H08A steel band progress ultrasonic cleaning and drying, the cross section of H08A steel band is processed into U-shaped structure,
Then roll forming is carried out after medicine core powder obtained in step 2) being added in H08A steel band with powder adding machine, then by H08A steel
Band heals up to form flux-cored wire matrix；
4) flux-cored wire matrix will be obtained using wire drawing die in step 3) and carry out drawing tube reducing, obtaining diameter is 2.4mm's
Flux-cored wire.
Sample 7,8,9 is obtained by the built-up welding of sandwich of layers self-shield flux-cored wire 3 times obtained in embodiment 3 respectively；Control weldering
Connecing electric current is 250A, weldingvoltage 28V, speed of welding 0.4m/min.Interlayer welding temperature is controlled at 300 DEG C.To obtaining
Sample 7,8,9 welding technological properties and the mechanical property of sandwich of layers that welding is formed detected to obtain table 3.
Table 3 is the welding technological properties of flux-cored wire obtained in embodiment 3 and is formed for flux-cored wire built-up welding 3 times sandwich
The mechanical property of layer
It practices, is had using the heavy-duty forging die with " sandwich of layers " structure, on 80,000 tons of press at present through actual production
It is produced certain model titanium alloy and fishes 7 batch of yoke forge piece, do not occur the failure such as severe plastic deformation, cracking, cast steel substrate obtains
Effective protection, significant effect.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (5)
1. a kind of self-shield flux-cored wire for heavy-duty forging die tool sandwich of layers, which is characterized in that medicine core in the flux-cored wire
Chemical component be calculated in mass percent, carbon element content 0.24-0.4%, silicon content 0.2-0.6%, manganese element content
0.8-1.2%, phosphorus element content≤0.02%, sulfur content≤0.02%, chromium content 1.8-2.5%, nickel element content
1.8-2.5%, molybdenum element content 1.2-1.6%, vanadium unit cellulose content 13-18%, surplus are iron and impurity.
2. the self-shield flux-cored wire according to claim 1 for heavy-duty forging die tool sandwich of layers, which is characterized in that should
The chemical component of medicine core is calculated in mass percent in flux-cored wire, carbon element content 0.32%, silicon content 0.4%, manganese element
Content 1.0%, phosphorus element content 0.01%, sulfur content 0.01%, chromium content 2.2%, nickel element content 2.1%, molybdenum element
Content 1.4%, vanadium unit cellulose content 16%, surplus are iron and impurity.
3. the self-shield flux-cored wire according to claim 1 for heavy-duty forging die tool sandwich of layers, which is characterized in that institute
State the sandwich of layers mechanical property at normal temperature of flux-cored wire built-up welding formation are as follows: yield strength σ s >=750MPa, tension degree σ b >=
1000MPa, compressive strength >=750MPa at 400 DEG C, elongation percentage δ >=25%, shrinking percentage Ψ >=35%, Impact energy Ak v >=40J.
4. the preparation described in any one of claim 1-3 for the self-shield flux-cored wire of heavy-duty forging die tool sandwich of layers
Method, which comprises the steps of:
1) 1h is respectively dried at 120 DEG C in raw material, the various raw material after drying is sieved respectively using 80 mesh sieve
Point, the raw material after screening are saved backup in the environment of 80 DEG C；
2) raw material are weighed as desired, weighed raw material are added in batch mixer and mix 2h, obtain medicine core powder；
3) after obtaining H08A steel band progress ultrasonic cleaning and drying, the cross section of H08A steel band is processed into U-shaped structure, then
Roll forming is carried out after medicine core powder obtained in step 2 is added in H08A steel band with powder adding machine, then closes H08A steel band
Mouth forms flux-cored wire matrix；
4) flux-cored wire matrix will be obtained using wire drawing die in step 3) and carry out drawing tube reducing, obtaining diameter is 1.6 ~ 3.2mm's
Flux-cored wire.
5. the preparation method of the self-shield flux-cored wire according to claim 4 for heavy-duty forging die tool sandwich of layers,
It is characterized in that, the diameter of flux-cored wire obtained in the step 4) is 2.4mm.
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| CN101850482A (en) * | 2010-06-23 | 2010-10-06 | 南通晨曦焊业有限公司 | Continuous casting roll hardfacing flux-cored wire |
| CN102500956A (en) * | 2011-11-12 | 2012-06-20 | 山东聚力焊接材料有限公司 | Blow-hole-resistant flux-cored wire |
| CN104955610A (en) * | 2013-01-31 | 2015-09-30 | 新日铁住金株式会社 | Flux cored wire, welding method using flux cored wire, method for producing welded joint using flux cored wire, and welded joint |
| CN105195925A (en) * | 2014-06-11 | 2015-12-30 | 上海司迈尔特种合金材料有限公司 | Carbon dioxide arc welding wire with small diameter of 1.6 mm and high alloy content |
| CN106624447A (en) * | 2016-12-27 | 2017-05-10 | 秦皇岛鸿翔焊业有限公司 | Flux-cored wire for overlaying repair remanufacturing of two intermediate rollers of Sendzimir mill and manufacturing method thereof |
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