CN106624450B - A kind of ultra supercritical heat-resistant steel flux-cored wire and preparation method thereof - Google Patents
A kind of ultra supercritical heat-resistant steel flux-cored wire and preparation method thereof Download PDFInfo
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- CN106624450B CN106624450B CN201710068892.2A CN201710068892A CN106624450B CN 106624450 B CN106624450 B CN 106624450B CN 201710068892 A CN201710068892 A CN 201710068892A CN 106624450 B CN106624450 B CN 106624450B
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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
- B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
-
- 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
Abstract
The invention discloses a kind of ultra supercritical heat-resistant steel flux-cored wires and preparation method thereof, the flux-cored wire includes crust and medicine core, crust is mild steel steel strip, by percentage to the quality, medicine core includes following components: graphite powder 3~5%, crome metal 35~50%, rutile 20~40%, molybdenum-iron 3~8%, ferromanganese powder 3~8%, nickel powder 1~8%, feldspar 2~8%, vanadium iron 1~5%, ferro-niobium 1~5%, fluoride 0.2~2% and surplus iron powder and inevitable impurity；Wherein, medicine core weight accounts for the 10~30% of welding wire total weight.Preparation method is to be uniformly mixed according to a ratio each component of medicine core to be placed on the mild steel steel strip as crust, wraps up or roll into silk and through drawing tube reducing to predetermined dimension, and the ultra supercritical heat-resistant steel flux-cored wire is made.
Description
Technical field
The invention belongs to weld the technical field of preparation, more particularly, it is related to a kind of ultra supercritical heat resisting steel medicine core weldering
Silk and preparation method thereof.
Background technique
Although ultra supercritical power generation technology in China has had the history of decades in foreign countries, at home also in just rising
Step section, and the research of corresponding ultra supercritical heat proof material is similarly in the starting stage.With operating temperature and operating pressure
Raising, it is desirable that the material of the important component in supercritical turbine have better thermostrength, resistance to high temperature corrosion and oxygen
Change performance, therefore the manufacturing technology of material becomes the key for restricting extra-supercritical unit development.For bearing certain load
It is often subjected to the high-temperature structural material of dramatic temperature variation again it may first have to which there is high antioxygenic property and certain heat resistance
Can, while must also have good thermal fatigue resistance to resist heat fatigue caused by temperature change, high structure stability with
Guarantee that structure size is stablized in the high temperature environment.Main component such as steam pipe line, drum, water-cooling wall, boiler in steam power plant etc.
It is all made of heat-resisting steel making.
The thermal efficiency for improving modern steam power plant seeks to improve first the temperature and pressure of steam.To meet this practical need
It wants, for many years, the content that relevant industries have been devoted to the research and development of New Heat-Resistant Steel, especially chromium is 9~12wt%
High chromium heat resisting steel development.The series heat resisting steel is due to very high obdurability, creep-resistant property and good anti-height
Temperature oxidation and corrosion resistance and paid close attention to, and become steam power plant in capital equipment material main choosing or update material.
ZG1Cr10MoVNbN heat resisting steel is supercritical turbine high temperature cast steel, is that China has independent intellectual property right
New material, be mainly used for the components such as supercritical turbine high-pressure inner cylinder, stop valve, nozzle, operating temperature is 600 DEG C,
Operating pressure is 25MPa, such part requirement material has preferable thermostrength, resistance to high temperature corrosion and oxidation susceptibility.So
The research and development of the material has a very important significance Development of Ultra-Supercritical generating set.
Ultra supercritical welding rod passes through the development of many years, has had and has been widely applied.And with the raising of the degree of automation,
More and more users need such automatically or semi-automatically welding material to replace manual welding rod, so the exploitation of such welding wire
It is extremely urgent.
Summary of the invention
In order to solve the problems in the existing technology, the object of the present invention is to provide one kind to be suitable for ultra supercritical steam turbine
Matching used ultra supercritical heat-resistant steel flux-cored wire of the heat resisting steel such as machine ZG1Cr10MoVNbN or T91/P91 and preparation method thereof.
An aspect of of the present present invention provides ultra supercritical heat-resistant steel flux-cored wire, and the flux-cored wire includes crust and medicine
Core, the crust are mild steel steel strip, and by percentage to the quality, the medicine core includes following components: graphite powder 3~5%, gold
Belong to chromium 35~50%, rutile 20~40%, molybdenum-iron 3~8%, ferromanganese powder 3~8%, nickel powder 1~8%, feldspar 2~8%, vanadium
Iron 1~5%, ferro-niobium 1~5%, fluoride 0.2~2% and surplus iron powder and inevitable impurity；Wherein, the medicine
Core weight accounts for the 10~30% of welding wire total weight
One embodiment of ultra supercritical heat-resistant steel flux-cored wire according to the present invention, the diameter of the flux-cored wire are φ
1.2~2.4mm.
One embodiment of ultra supercritical heat-resistant steel flux-cored wire according to the present invention, by percentage to the quality, the low-carbon
Steel steel strip includes following component: C 0.02~0.045%, Mn 0.15~0.35%, Si≤0.035%, S≤0.015%, P
≤ 0.017% and surplus iron and inevitable impurity.
One embodiment of ultra supercritical heat-resistant steel flux-cored wire according to the present invention, the fluoride are calcirm-fluoride, fluorine titanium
One of sour potassium and potassium fluoroaluminate are a variety of.
One embodiment of ultra supercritical heat-resistant steel flux-cored wire according to the present invention, the flux-cored wire are suitable for super face
Boundary's steam turbine ZG1Cr10MoVNbN or T91/P91 heat resisting steel matches.
One embodiment of ultra supercritical heat-resistant steel flux-cored wire according to the present invention, by percentage to the quality, the medicine core
The welding deposited metal of welding wire includes following component: C 0.08~0.13%, Mn≤1.20%, Si≤0.50%, S≤
0.015%, P≤0.020%, Cr 8.0~10.5%, Mo 0.85~1.20%, Ni≤0.8%, V 0.15~0.30%, Nb
0.02~0.10% and surplus Fe and inevitable impurity.
One embodiment of ultra supercritical heat-resistant steel flux-cored wire according to the present invention, the diffusible hydrogen of the welding deposited metal
Content be less than 5mL/100g and mechanical property are as follows: tensile strength >=620Mpa, yield strength >=540Mpa, elongation percentage >=16%,
20 DEG C of impacts reach 40J.
Another aspect provides the preparation methods of above-mentioned ultra supercritical heat-resistant steel flux-cored wire, by each of medicine core
Component, which is uniformly mixed according to a ratio, to be placed on the mild steel steel strip as crust, wrap up or roll into silk and through drawing tube reducing extremely
The ultra supercritical heat-resistant steel flux-cored wire is made in predetermined dimension.
Ultra supercritical heat-resistant steel flux-cored wire of the invention can it is mating for supercritical turbine ZG1Cr10MoVNbN,
The heat resisting steel such as T91/P9 1, meet the requirement of 17493 E91T1-B9M of standard GB/T/T.Also, the welding of the flux-cored wire
Processing performance and physicochemical property are good, reach that welding technological properties is good, arc stability, splashing is small, appearance of weld is beautiful in technique
The purpose of seeing and being able to carry out all-position welding achievees the purpose that with excellent mechanical performances in performance.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification unless specifically stated can be equivalent or with similar purpose by other
Alternative features are replaced.That is, unless specifically stated, each feature is an example in a series of equivalent or similar characteristics
?.
First ultra supercritical heat-resistant steel flux-cored wire of the invention is described in detail below.
An exemplary embodiment of the present invention, the ultra supercritical heat-resistant steel flux-cored wire include crust and medicine core, outside
Skin is mild steel steel strip, and by percentage to the quality, the medicine core includes following components: graphite powder 3~5%, crome metal 35~
50%, rutile 20~40%, molybdenum-iron 3~8%, ferromanganese powder 3~8%, nickel powder 1~8%, feldspar 2~8%, vanadium iron 1~5%,
The iron powder and inevitable impurity of ferro-niobium 1~5%, fluoride 0.2~2% and surplus；Wherein, it is total to account for welding wire for medicine core weight
The 10~30% of weight.
Heat resisting steel is usually that alloying element is added, i.e., the elevated temperature strength of steel is improved by alloying.Common alloy member
It is known as chromium, aluminium, vanadium, tungsten, niobium, boron, silicon, rare earth etc., by the way that alloying element is added and carries out heat treatment process appropriate, Ke Yiqi
To the effect of solution strengthening, intercrystalline strengthening and precipitation strength.The solution strengthening of high alloy content has the intensity for improving heat resisting steel
There is certain effect, but high chromium heat resisting steel generally uses the second phase particles of small and dispersed to strengthen to improve its intensity.Because thin
The second phase particles of small disperse while improving the strength of materials, can play pinning dislocation, hinder dislocation motion, thus play into
One step improves the effect of heat-resisting hardness of steel.
The main function of each component is as follows in medicine core powder of the present invention:
Graphite powder: in ultra supercritical wlding, graphite appropriate, which is added, can expand and stable austenite, improve weld seam
Elevated temperature strength.In the range of graphite powder content is 3~5%, deposited metal has preferable toughness and intensity.Carbon content is too low
Elevated temperature strength deficiency is easily caused, carbon content is excessively high to be easy to appear solidification cracking.
Crome metal: chromium is epochmaking alloying element in heat resisting steel.It, can be in the surface shape of steel when chrome content is enough in steel
At fine and close oxidation film.This layer of oxidation film can prevent to a certain extent the corrosive gas such as oxygen, sulphur, nitrogen from spreading into steel,
Metal ion can be prevented to external diffusion.The resistance to high temperature corrosion performance and amount containing Cr of heat resisting steel have certain relationship, when amount containing Cr reaches
When to 9% or more, the high-temperature oxidation resistance of steel is significantly improved.The present invention is improved by the way that crome metal is added directly in medicine core
The chromium content of deposited metal, to improve its mechanical property.
Rutile: being 20~40% or so in additional amount, can be good at playing the role of slag making, stablizes electric arc.If
It is added excessively, slag can be caused relatively viscous, slag mobility is bad；If addition is very few, slag making cannot be played and stablize the work of electric arc
With influencing the processing performance of wlding.
Molybdenum-iron: the main source as molybdenum in weld metal.Molybdenum is one of the most important alloying element for improving heat resistance, resistance to
Generally all contain Mo in hot steel.Mo is dissolved in ferrite, can significantly improve ferritic recrystallization temperature, so that it is strong to improve creep
Degree, Mo can generate dispersion-strengthened action simultaneously in the form of tiny carbide, and molybdenum is intensified element important in weld metal,
The too low weld metal intensity that will lead to of content is insufficient in the medicine core of flux-cored wire of the present invention, and too high levels will lead to intensity mistake
High, toughness deteriorates.Molybdenum-iron content is limited in medicine core as 3~8%, preferably molybdenum content be 50~60% molybdenum-iron.
Manganese iron: the main source as manganese in weld metal.Increase manganese in weld seam and on the one hand reinforce deoxidation, on the one hand increases
Add the quantity of acicular ferrite, while accordingly having reduced the quantity of pro-eutectoid ferrite and layered component, refines weld seam
The microscopic structure of acicular ferrite and coarse grain zone improves the impact flexibility of weld seam.
Nickel powder: the main source as nickel in weld metal.Nickel is alloying element important in weld(ing) deposit, to mentioning
High intensity has certain contribution, but acts on limited.
Feldspar: 2~8% feldspar, which is added, can effectively refine molten drop particle, reduce the molding splashed and improve weld seam.
Vanadium iron: for the main source of vanadium in weld metal.Vanadium generates tiny uniform mainly by heat treatment appropriate
The carbide particle of distribution, enables steel to strengthen.In Cr-Mo-V steel, since the carbide of V is sufficiently stable, by carbon fixation
The alloying elements such as Cr, Mo are promoted more to dissolve in solid solution, in this way, playing the role of promoting solution strengthening indirectly.
Ferro-niobium: being added 1~5% or so ferro-niobium, and elevated temperature strength can be improved, and refines crystal grain, prevents crystal grain under high temperature long
Greatly.
Fluoride: content of the fluorine to reduce Diffusible Hydrogen In Deposited Metal, but content of fluoride is excessively high, when will cause welding
Electric arc is unstable, splashing becomes larger, arcing sounds are deteriorated, and controls and is preferred for 0.2~2%.According to the present invention, fluoride can be fluorination
One of calcium, potassium fluotitanate and potassium fluoroaluminate are a variety of.
Iron powder: addition iron powder, which can be improved welding efficiency and provide a small amount of oxygen, in medicine core is used for stabilising arc, high in order to guarantee
Deposition efficiency is mainly derived from reduced iron powder or atomized iron powder.
The present invention is to assemble by the organic of above-mentioned medicine core component and cooperate to realize this with mild steel steel strip crust
The goal of the invention and technical effect of invention.
According to the present invention, the mild steel steel strip includes following component: C 0.02~0.045%, Mn0.15~
0.35%, the iron of Si≤0.035%, S≤0.015%, P≤0.017% and surplus and inevitable impurity.Control steel band
Carbon content, be conducive to the drawing of steel band in process of production；The content of impurity element S, P in strict control steel band, mentions
High impact toughness reduces the temper brittleness of deposited metal, further increases welding wire performance.
Preferred mild steel steel strip includes following component: C 0.035%, Mn 0.25%, Si 0.015%, S
0.006%, P 0.011% and the iron and inevitable impurity of surplus.
The diameter of ultra supercritical heat-resistant steel flux-cored wire of the invention is preferably 1.2~2.4mm of φ.Using of the invention
When ultra supercritical heat-resistant steel flux-cored wire is welded, by percentage to the quality, it includes following component that gained, which welds deposited metal:
C 0.08~0.13%, Mn≤1.20%, Si≤0.50%, S≤0.015%, P≤0.020%, Cr 8.0~10.5%, Mo
0.85~1.20%, the Fe of Ni≤0.8%, V 0.15~0.30%, Nb 0.02~0.10% and surplus and inevitably
Impurity.Also, the diffusible hydrogen content of the welding deposited metal is less than 5mL/100g and mechanical property are as follows: tensile strength >=
620MPa, yield strength >=540MPa, elongation percentage >=16%, 20 DEG C of ballistic works reach 40J.
To sum up, ultra supercritical heat-resistant steel flux-cored wire of the invention mating can be used for supercritical turbine
The welding of the heat resisting steel such as ZG1Cr10MoVNbN, T91/P91 meets standard GB/T/T 17493E91T1-B9M requirement,
Welding technological properties and physicochemical property are good.
Meanwhile the present invention also provides the preparation methods of above-mentioned ultra supercritical heat-resistant steel flux-cored wire, specifically: by medicine core
Each component be uniformly mixed according to a ratio and be placed on the mild steel steel strip as crust, wrap up or roll into silk and subtract through drawing
The ultra supercritical heat-resistant steel flux-cored wire is made to predetermined dimension in diameter.
It wherein, can be for 12~16mm of width and with a thickness of the low-carbon of 0.6~1.0mm as the mild steel steel strip of crust
Steel steel strip, and the flux-cored wire diameter of predetermined dimension is 1.2~2.4mm of φ.
It should be understood that above embodiment and following embodiment that the present invention is described in detail are merely to illustrate the present invention rather than limit
The scope of the present invention processed, some nonessential improvement and tune that those skilled in the art's above content according to the present invention is made
It is whole to all belong to the scope of protection of the present invention.
Ultra supercritical heat-resistant steel flux-cored wire and preparation method thereof of the invention is made into one combined with specific embodiments below
Walk explanation.
Embodiment 1:
Crust using the steel band of 14mm × 0.8mm (width x thickness) as welding wire, chemical component include C
0.035wt%, Mn 0.25wt%, Si 0.015wt%, S 0.006wt%, P 0.011wt% and surplus iron and can not
The impurity avoided.
The medicine core weight of 666kg welding wire is produced for 100kg (15wt% that medicine core weight accounts for entire welding wire weight), in medicine core
Each component content are as follows: graphite powder: 5kg, crome metal: 35kg, rutile: 20kg, molybdenum-iron: 3kg, ferromanganese powder: 3kg, nickel powder: 1kg,
Feldspar: 2kg, vanadium iron: 1kg, ferro-niobium: 1kg, fluoride: 0.2kg adds iron powder 28.8kg to medicine core ingredient gross weight 100kg.
Medicine core each component is stand-by after mixing, crust is placed in welding wire molding machine, successively mixes stand-by medicine core
It closes material injection to be laterally bent into the crust groove of U-typed, and then rolls into silk, is pulled to Φ 1.2mm carefully up to ultra supercritical
Heat-resistant steel flux-cored wire.
Embodiment 2:
Crust using the steel band of 14mm × 0.8mm (width x thickness) as welding wire, chemical component be C 0.025wt%,
Mn 0.20wt%, Si 0.012wt%, S 0.004wt%, P 0.008wt% and surplus iron and inevitable impurity.
Wherein, each component content in 100kg medicine core are as follows: graphite powder: 4kg, crome metal: 42kg, rutile: 26kg, molybdenum-iron:
5kg, ferromanganese powder: 5kg, nickel powder: 3kg, feldspar: 5kg, vanadium iron: 3kg, ferro-niobium: 3kg, fluoride: 1kg adds iron powder 3kg to medicine core
Ingredient gross weight 100kg.
Medicine core each component is stand-by after mixing, crust is placed in welding wire molding machine, successively mixes stand-by medicine core
It closes material injection to be laterally bent into the crust groove of U-typed, and then rolls into silk, is pulled to Φ 1.2mm carefully up to ultra supercritical
Heat-resistant steel flux-cored wire.
Embodiment 3:
In addition to drug core component content is different, remaining condition is same as Example 1.
Wherein, each component content in 100kg medicine core are as follows: graphite powder: 5kg, crome metal: 45kg, rutile: 20kg, molybdenum-iron:
5kg, ferromanganese powder: 3kg, nickel powder: 5kg, feldspar: 3kg, vanadium iron: 5kg, ferro-niobium: 5kg, fluoride: 0.5kg adds iron powder 3.5kg extremely
Medicine core ingredient gross weight 100kg.
Medicine core each component is stand-by after mixing, crust is placed in welding wire molding machine, successively mixes stand-by medicine core
It closes material injection to be laterally bent into the crust groove of U-typed, and then rolls into silk, is pulled to Φ 1.2mm carefully up to ultra supercritical
Heat-resistant steel flux-cored wire.
Embodiment 1 is used for the welding of test plate (panel), welding parameter I to the ultra supercritical heat-resistant steel flux-cored wire of embodiment 3
=240~260A, U=28~30V, gas flow 20L/min, protective gas are as follows: 80%Ar+20%CO2。
Wherein, gained welding deposited metal chemical component it is as shown in table 1, gained weld deposited metal mechanical property and
Diffusible hydrogen content is as shown in table 2.
The chemical component (wt%) of the welding deposited metal of table 1
The mechanical property (mixed gas) and diffusible hydrogen content of the welding deposited metal of table 2
In conclusion ultra supercritical heat-resistant steel flux-cored wire of the invention mating can be used for supercritical turbine
The heat resisting steel such as ZG1Cr10MoVNbN, T91/P9 1 meet the requirement of 17493 E91T1-B9M of standard GB/T/T.Also, it should
The welding technological properties and physicochemical property of flux-cored wire are good, reach that welding technological properties is good, arc stability, splashing in technique
It is small, appearance of weld is beautiful and the purpose of being able to carry out all-position welding, achieve the purpose that in performance with excellent mechanical performances.
The invention is not limited to specific embodiments above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (8)
1. a kind of ultra supercritical heat-resistant steel flux-cored wire, which is characterized in that the flux-cored wire includes crust and medicine core, described outer
Skin is mild steel steel strip, and by percentage to the quality, the medicine core includes following components: graphite powder 3~5%, crome metal 35~
50%, rutile 20~40%, molybdenum-iron 3~8%, ferromanganese powder 3~8%, nickel powder 3~8%, feldspar 2~8%, vanadium iron 3~5%,
The iron powder and inevitable impurity of ferro-niobium 1~5%, fluoride 0.2~2% and surplus；Wherein, the medicine core weight accounts for weldering
The 10~30% of silk total weight.
2. ultra supercritical heat-resistant steel flux-cored wire according to claim 1, which is characterized in that the diameter of the flux-cored wire is
1.2~2.4mm of φ.
3. ultra supercritical heat-resistant steel flux-cored wire according to claim 1, which is characterized in that by percentage to the quality, described
Mild steel steel strip includes following component: C 0.02~0.045%, Mn 0.15~0.35%, Si≤0.035%, S≤
0.015%, P≤0.017% and the iron and inevitable impurity of surplus.
4. ultra supercritical heat-resistant steel flux-cored wire according to claim 1, which is characterized in that the fluoride be calcirm-fluoride,
One of potassium fluotitanate and potassium fluoroaluminate are a variety of.
5. ultra supercritical heat-resistant steel flux-cored wire according to claim 1, which is characterized in that the flux-cored wire is suitable for super
Supercritical pressure turbine ZG1Cr10MoVNbN or T91/P91 heat resisting steel matches.
6. ultra supercritical heat-resistant steel flux-cored wire according to claim 1, which is characterized in that by percentage to the quality, described
The welding deposited metal of flux-cored wire includes following component: C 0.08~0.13%, Mn≤1.20%, Si≤0.50%, S≤
0.015%, P≤0.020%, Cr 8.0~10.5%, Mo 0.85~1.20%, Ni≤0.8%, V 0.15~0.30%, Nb
0.02~0.10% and surplus Fe and inevitable impurity.
7. ultra supercritical heat-resistant steel flux-cored wire according to claim 6, which is characterized in that the expansion of the welding deposited metal
It dissipates hydrogen content and is less than 5mL/100g and mechanical property are as follows: tensile strength >=620Mpa, yield strength >=540Mpa, elongation percentage >=
16%, 20 DEG C of impacts reach 40J.
8. the preparation method of ultra supercritical heat-resistant steel flux-cored wire as described in any one of claims 1 to 7, which is characterized in that
The each component of medicine core is uniformly mixed according to a ratio and is placed on the mild steel steel strip as crust, wraps up or rolls into silk and pass through
The ultra supercritical heat-resistant steel flux-cored wire is made to predetermined dimension in drawing tube reducing.
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| CN107116317A (en) * | 2017-05-17 | 2017-09-01 | 安徽飞弧焊业股份有限公司 | A kind of Jaw plate flux-cored wire |
| CN107717257B (en) * | 2017-11-27 | 2020-02-14 | 四川大西洋焊接材料股份有限公司 | Flux-cored wire matched with ultra-supercritical heat-resistant steel and preparation method thereof |
| CN109623192B (en) * | 2018-12-21 | 2021-06-01 | 中国船舶重工集团公司第七二五研究所 | Stainless steel welding rod core wire with extremely low temperature rise, stainless steel welding rod, preparation and application |
| CN113458656B (en) * | 2021-07-09 | 2022-10-21 | 昆山京群焊材科技有限公司 | A2.25% Cr-1% Mo-V steel electrode for hydrogenation reactor and its preparation method |
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| JPS6045994B2 (en) * | 1982-02-19 | 1985-10-14 | 新日本製鐵株式会社 | CO↓2 shield flux cored wire for hardfacing |
| CN1093451C (en) * | 1999-04-06 | 2002-10-30 | 河北省电力试验研究所 | Tungsten-pole argon arc-welding power-core weld wire for 9-chromium-molybdenum-niobium-alumen heat resisting steel |
| KR100581027B1 (en) * | 2004-07-28 | 2006-05-17 | 현대종합금속 주식회사 | Flux cored wire for martensitic stainless steel |
| CN100457373C (en) * | 2007-04-27 | 2009-02-04 | 北京工业大学 | High-alloy martensite type refractory steel air-protecting flux-cored wire |
| CN102489901B (en) * | 2011-12-09 | 2013-12-04 | 四川大西洋焊接材料股份有限公司 | Gas protective welding flux cored wire for welding heat resistant steel |
| CN103056549B (en) * | 2012-12-20 | 2015-07-01 | 中冶焊接科技有限公司 | Alkaline CO2 gas protection dilute alloy heat resistant steel flux-cored wire |
| CN104259690B (en) * | 2014-07-09 | 2017-03-01 | 北京工业大学 | A kind of stainless heat-resistance type self-protection flux-cored wire for magnesium smelting reduction pot |
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