CN103659051B - A kind of nuclear power engineering carbon steel flux-cored wire and Synthesis and applications thereof - Google Patents
A kind of nuclear power engineering carbon steel flux-cored wire and Synthesis and applications thereof Download PDFInfo
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- CN103659051B CN103659051B CN201410004497.4A CN201410004497A CN103659051B CN 103659051 B CN103659051 B CN 103659051B CN 201410004497 A CN201410004497 A CN 201410004497A CN 103659051 B CN103659051 B CN 103659051B
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- carbon steel
- cored wire
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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
- B23K35/36—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/3073—Fe as the principal constituent with Mn as next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
- B23K35/3608—Titania or titanates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
- B23K35/406—Filled tubular wire or rods
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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 provides a kind of nuclear power engineering carbon steel flux-cored wire and Synthesis and applications thereof, belong to field of welding material.Carbon steel flux-cored wire provided by the invention, its medicine core comprises the component of following percentage by weight: TiO2:40-60%; Mn:15-30%; SiO2:1-15%; Mo:0.01-0.5%; ZrO2:0.1-1.0%; The total amount of Al and Mg: 0.1-4%; Fluoride: 0-0.08%; Surplus is iron powder; The filling rate of described medicine core is 10-20%.Carbon steel flux-cored wire provided by the invention, improves weld seam overall performance effectively, solves the problem of weld metal low-temperature flexibility deficiency, can be widely used in the welding for steel structure in nuclear power engineering.
Description
Technical field
The invention belongs to field of welding material, be specifically related to a kind of nuclear power engineering carbon steel flux-cored wire and Synthesis and applications thereof.
Background technology
Welding material is mainly divided into stick electrode, copper plating solid core welding wire, submerged arc welding flux and flux-cored wire.Flux-cored wire, as high efficiency of new generation, high performance welding material, is subject to the welcome of every profession and trade deeply.Particularly titania-type flux-cored welding wire, the features such as the little and all-position welding function admirable of, beautiful appearance good with its de-slag, splashing and the dark favor by welder, promote the rapidest in shipping industry, manufacture of steel structure industry, with fastest developing speed.
In recent years, along with developing rapidly of China's nuclear power industry, the degree of the mechanization of welding processing industry and automation is more and more higher, the advantages such as flux-cored wire is high with its welding efficiency, processing performance is excellent, obtain applying more and more widely in China's nuclear power industry rapidly, and progressively replace carbon steel and iron powder electrode.The development level of nuclear power industry, intensively can reflect whole industrial foundation and the scientific and technological level of this country, its yield strength to steel construction, tensile strength, low-temperature flexibility etc. have very high requirement, wherein tensile strength is at more than 480MPa, and common carbon steel flux-cored wire cannot meet these requirements.
How improving the mentality of designing of existing rutile type slag flux-cored wire formula, improve the internal soundness of titania-type flux-cored welding wire, develop intensity high and low temperature good toughness, be suitable for the novel carbon steel flux-cored wire of nuclear power industry application, is very important research topic.
Summary of the invention
For solving the problem, the invention provides a kind of carbon steel flux-cored wire being applicable to welding for steel structure in nuclear power engineering, the following technical scheme of concrete employing:
A kind of nuclear power engineering carbon steel flux-cored wire, comprise carbon steel crust and medicine core, it is characterized in that, described medicine core comprises the component of following percentage by weight:
TiO
2：40-60%；
Mn：15-30%；
SiO
2：1-15%；
Mo：0.01-0.5%；
ZrO
2：0.1-1.0%；
The total amount of Al and Mg: 0.1-4%;
Fluoride: 0-0.08%;
Surplus is iron powder;
The filling rate of described medicine core is 10-20%.
Preferably, described fluoride is one or more the combination in sodium fluoride, prodan, potassium fluosilicate and cryolite.
Preferably, described carbon steel crust comprises the component of following percentage by weight:
C:0.03%; Mn:0.25%; Si:0.015%; S:0.004%; P:0.008%; Surplus is iron.
Preferably, the diameter of described carbon steel flux-cored wire is 1.20-1.60mm.
Prepare the method for nuclear power engineering carbon steel flux-cored wire recited above, it is characterized in that, adopt following steps: after components in certain proportion each in medicine core being mixed, medicine core is placed on carbon steel crust, through being rolled into silk or rolling into silk, be then carefully pulled to dimension and namely obtain described nuclear power engineering carbon steel flux-cored wire.
The application of nuclear power engineering carbon steel flux-cored wire recited above in welding, is characterized in that, described carbon steel flux-cored wire is for welding the steel plate that tensile strength is 510-630MPa.
Preferably, described flux-cored wire adopts Ar and CO when welding
2mixed gas protected, the volume ratio of described mist is Ar:CO
2=4:1
Design of the present invention is as follows:
TiO2: mainly play slag making and stabilising arc.Improve the de-slag of weld seam and shaping, slag fusing point and viscosity can be regulated, make it that there is good all positon operating characteristics.
ZrO2 is slag former, and its content is how many has certain influence to processing performance, and particularly the removability of slag of butt welded seam has certain help.Along with the increase of ZrO2 content, slag becomes crisp, and the intensity of slag reduces, and the yellow color in slag increases gradually, and appearance of weld is better.But when its content is excessive, slag melting point is high, easily there is foundary weight water phenomenon.
Fluoride: fluorine is in order to reduce the content of Diffusible Hydrogen In Deposited Metal, but content of fluoride is too high, when can cause welding electric arc unstable, splash become large, arcing sounds is deteriorated, and is mainly derived from sodium fluoride, prodan, potassium fluosilicate or cryolite.
Iron powder: add the core that is used as medicine in medicine core and can improve welding efficiency and provide a small amount of oxygen for stabilising arc, in order to ensure high deposition efficiency, be mainly derived from reduced iron powder or atomized iron powder.
Ferromanganese powder: increase manganese and strengthen deoxidation on the one hand in weld seam, add the ferritic quantity of symptom on the one hand, the simultaneously corresponding quantity decreasing pro-eutectoid ferrite and layered component, the refinement acicular ferrite of weld seam and the microscopic structure of coarse grain zone, improve the impact flexibility of weld seam.
Molybdenum-iron powder: molybdenum-iron powder plays the effect of gaining in strength with crystal grain thinning.Add appropriate molybdenum-iron powder to make up because manganese silicon reduces the deficiency of the intensity brought.
Mg, Al are the strong deoxidiers in medicine core formula.Appropriate Mg, Al can make the spray regime of electric arc easily realize, and the MgO at high temperature reacting generation enters slag, are conducive to the basicity improving slag, and the low-temperature flexibility of Resistance of Weld Metal is beneficial to.Very little, flux-cored wire deoxidation can be caused not enough, and the oxygen content in weld seam increases Mg, Al total content, reduces the low-temperature impact toughness of weld metal; But total content is too much, the blowing force of electric arc can be caused too large, during leg weld seam, easily produce undercut phenomenon.
Beneficial effect of the present invention is as follows:
1. nuclear power engineering carbon steel flux-cored wire provided by the invention, the formula of carbon steel crust especially medicine core is optimized, the component kind added in medicine core is few, still can meet the requirement of welding for steel structure intensity high and low temperature good toughness, when reducing carbon steel flux-cored wire preparation cost, the welding for steel structure in nuclear power engineering can be widely used in.
2. nuclear power engineering carbon steel flux-cored wire provided by the invention, welding technological properties and physicochemical property are good, technique reaches arc stability, splash little, appearance of weld is attractive in appearance, all positon good operation performance; Performance reaches good mechanical property.
3. nuclear power engineering carbon steel flux-cored wire provided by the invention, the Hydrogen Diffusion in Deposited Metal after welding low (being less than 5mL/100g), causes the possibility of weld seam or heat affected area generation cold crack low.
4. nuclear power engineering carbon steel flux-cored wire provided by the invention, has ultralow S, P content (S, P total amount is less than 0.02) in the deposited metal after welding, reduce the possibility that welding wire deposited metal produces solidification cracking.
5. nuclear power engineering carbon steel flux-cored wire provided by the invention, deposited metal after welding: tensile strength is 510-630Mpa, yield strength >=400Mpa, percentage elongation >=22% ,-20 DEG C of impacts reach 150J,-30 DEG C of impacts reach 120J, and deposited metal diffusible hydrogen content is less than 5mL/100g.Effectively improve weld seam overall performance, solve the problem of weld metal low-temperature flexibility deficiency, the requirement to flux-cored wire in nuclear power work can be met, the welding for steel structure in nuclear power engineering can be widely used in.
6. adopt argon-rich gas (Ar 80%+CO during flux-cored wire welding of the present invention
220%) protect, be conducive to the stable of weld seam low-temperature impact toughness.
7. welding wire of the present invention can be supporting for carbon steel, meets the requirement of E71T-12M in AWS A5.20.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some distortion and improvement can also be made.These all belong to protection scope of the present invention.
embodiment 1
Adopt the steel band of (wide × thick) 14 × 0.9mm as the crust of welding wire, its chemical composition is C 0.03wt%, Mn 0.25wt%, Si 0.015wt%, S 0.004wt%, P 0.008wt%, surplus be iron.
Medicinal powder composition percentage, medicinal powder accounts for 14% of welding wire weight, and medicinal powder composition mass percent is wherein that in medicine core, each composition is: TiO2:45%, Mn:15%, SiO2:3%, Mo:0.3%, ZrO2:1.0%, Al+Mg:3%, fluoride: 0.04%, surplus is iron powder.
Each for medicine core composition is mixed rear stand-by; Steel band to be placed in welding wire forming machine, stand-by medicine core compound to be injected laterally be bent in the steel band groove of " U " type successively, and then roll into silk, through being carefully pulled to Φ 1.2mm.
The flux-cored wire obtained in the present embodiment is welded, welding parameter: I=230-250A, U=28-30V, gas flow 20L/min, gas type are 80%Ar+20%CO2(volumn concentration); Arc stability during welding, splash little, the removability of slag is good, and all-position welding function admirable, appearance of weld is attractive in appearance, and bead height is moderate.
Deposited metal composition is in table one, and deposited metal mechanical performance (mist) is in table two, and diffusible hydrogen content is: 3.0mL/100g.
Table one: deposited metal composition ((wt, %) calculates by weight percentage, and surplus is Fe)
| C | Mn | Si | S | P | Mo |
| 0.05 | 1.15 | 0.40 | 0.006 | 0.011 | 0.15 |
Table two: (gas type is 80%Ar+20%CO to deposited metal mechanical property
2):
embodiment 2
Adopt the steel band of (wide × thick) 14 × 0.9mm as the crust of welding wire, its chemical composition is C 0.03wt%, Mn 0.25wt%, Si 0.015wt%, S 0.004wt%, P 0.008wt%, surplus be iron.
Medicinal powder composition percentage, medicinal powder accounts for 14% of welding wire weight, and in medicine core, the mass percent of each composition is: TiO2:50%, Mn:18%, SiO2:1.0%, Mo:0.2%, ZrO2:0.8%, Al+Mg:4%, fluoride: 0.03%, and surplus is iron powder.
After components in certain proportion each in medicine core is mixed, medicine core is placed on carbon steel crust, through being rolled into silk or rolling into silk, is then carefully pulled to Φ 1.6mm and namely obtains described carbon steel flux-cored wire.
The flux-cored wire obtained in the present embodiment is welded, welding parameter: I=230-250A, U=28-30V, gas flow 20L/min, gas type are 80%Ar+20%CO2(volumn concentration); Arc stability during welding, splash little, the removability of slag is good, and all-position welding function admirable, appearance of weld is attractive in appearance, and bead height is moderate.
Deposited metal composition is in table three, and deposited metal mechanical performance (mist) is in table four, and diffusible hydrogen content is: 4.0mL/100g.
Table three: deposited metal composition ((wt, %) calculates by weight percentage, and surplus is Fe)
| C | Mn | Si | S | P | Mo |
| 0.045 | 1.25 | 0.25 | 0.005 | 0.010 | 0.10 |
Table four: (gas type is 80%Ar+20%CO to deposited metal mechanical property
2):
embodiment 3
Adopt the steel band of (wide × thick) 14 × 0.9mm as the crust of welding wire, its chemical composition is C 0.03wt%, Mn 0.25wt%, Si 0.015wt%, S 0.004wt%, P 0.008wt%, surplus be iron.
Medicinal powder composition percentage, medicinal powder accounts for 14% of welding wire weight, and in medicine core, the mass percent of each composition is: TiO2:55%, Mn:22%, SiO2:1.0%, Mo:0.4%, ZrO2:0.6%, Al+Mg:2%, fluoride: 0.02%, and surplus is iron powder.
Each for medicine core composition is mixed rear stand-by; Steel band to be placed in welding wire forming machine, stand-by medicine core compound to be injected laterally be bent in the steel band groove of " U " type successively, and then roll into silk, through being carefully pulled to Φ 1.4mm.
The flux-cored wire obtained in the present embodiment is welded, welding parameter: I=230-250A, U=28-30V, gas flow 20L/min, gas type are 80%Ar+20%CO2(volumn concentration); Arc stability during welding, splash little, the removability of slag is good, and all-position welding function admirable, appearance of weld is attractive in appearance, and bead height is moderate.
Deposited metal composition is in table five, and deposited metal mechanical performance (mist) is in table six, and diffusible hydrogen content is: 3.8mL/100g.
Table five: deposited metal composition ((wt, %) calculates by weight percentage, and surplus is Fe)
| C | Mn | Si | S | P | Mo |
| 0.052 | 1.40 | 0.27 | 0.004 | 0.011 | 0.10 |
Table six: (gas type is 80%Ar+20%CO to deposited metal mechanical property
2):
Claims (7)
1. a nuclear power engineering carbon steel flux-cored wire, comprise carbon steel crust and medicine core, it is characterized in that, described medicine core comprises the component of following percentage by weight:
TiO
2：40-60%；
Mn：15-30%；
SiO
2：1-15%；
Mo：0.01-0.5%；
ZrO
2：0.1-1.0%；
The total amount of Al and Mg: 0.1-4%;
Fluoride: 0-0.08%;
Surplus is iron powder;
The filling rate of described medicine core is 10-20%.
2. nuclear power engineering carbon steel flux-cored wire according to claim 1, is characterized in that, described fluoride is one or more the combination in sodium fluoride, prodan, potassium fluosilicate and cryolite.
3. nuclear power engineering carbon steel flux-cored wire according to claim 1, is characterized in that, described carbon steel crust comprises the component of following percentage by weight:
C:0.03%; Mn:0.25%; Si:0.015%; S:0.004%; P:0.008%; Surplus is iron.
4. the nuclear power engineering carbon steel flux-cored wire according to any one of claim 1-3, is characterized in that, the diameter of described carbon steel flux-cored wire is 1.20-1.60mm.
5. the method for the nuclear power engineering carbon steel flux-cored wire of preparation according to any one of claim 1-4, it is characterized in that, adopt following steps: after components in certain proportion each in medicine core being mixed, medicine core is placed on carbon steel crust, through being rolled into silk or rolling into silk, be then carefully pulled to dimension and namely obtain described carbon steel flux-cored wire.
6. the application of nuclear power engineering carbon steel flux-cored wire in welding described in any one of claim 1-4, is characterized in that, described carbon steel flux-cored wire is for welding the steel plate that tensile strength is 510-630MPa.
7. the application of nuclear power engineering carbon steel flux-cored wire according to claim 6 in welding, is characterized in that, described flux-cored wire adopts Ar and CO when welding
2mixed gas protected, the volume ratio of described mist is Ar:CO
2=4:1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410004497.4A CN103659051B (en) | 2014-01-06 | 2014-01-06 | A kind of nuclear power engineering carbon steel flux-cored wire and Synthesis and applications thereof |
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|---|---|---|---|
| CN201410004497.4A CN103659051B (en) | 2014-01-06 | 2014-01-06 | A kind of nuclear power engineering carbon steel flux-cored wire and Synthesis and applications thereof |
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| CN103659051B true CN103659051B (en) | 2015-11-04 |
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| US10646965B2 (en) * | 2015-08-11 | 2020-05-12 | Hobart Brothers Llc | Tubular welding wire with a thinner sheath for improved deposition rates |
| CN105382441A (en) * | 2015-12-18 | 2016-03-09 | 天津市庆鑫祥科技发展有限公司 | Stainless steel welding wire and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102009287A (en) * | 2010-12-13 | 2011-04-13 | 首钢总公司 | Electrogas welding gas shield flux-cored wire for large heat input welding |
| CN102310301A (en) * | 2011-08-25 | 2012-01-11 | 张家港市亨昌焊材有限公司 | Flux-cored wire |
| CN102350597A (en) * | 2011-10-26 | 2012-02-15 | 南通晨曦焊业有限公司 | Flux-cored wire for low alloy high strength ship steel |
| EP2666575A1 (en) * | 2012-05-21 | 2013-11-27 | Air Liquide Welding France | Cored wire for welding steels with high yield strength |
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2014
- 2014-01-06 CN CN201410004497.4A patent/CN103659051B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102009287A (en) * | 2010-12-13 | 2011-04-13 | 首钢总公司 | Electrogas welding gas shield flux-cored wire for large heat input welding |
| CN102310301A (en) * | 2011-08-25 | 2012-01-11 | 张家港市亨昌焊材有限公司 | Flux-cored wire |
| CN102350597A (en) * | 2011-10-26 | 2012-02-15 | 南通晨曦焊业有限公司 | Flux-cored wire for low alloy high strength ship steel |
| EP2666575A1 (en) * | 2012-05-21 | 2013-11-27 | Air Liquide Welding France | Cored wire for welding steels with high yield strength |
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