CN103909357A - Flux-cored cutting wire for closed space cutting under pressure - Google Patents

Flux-cored cutting wire for closed space cutting under pressure Download PDF

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Publication number
CN103909357A
CN103909357A CN201410138012.0A CN201410138012A CN103909357A CN 103909357 A CN103909357 A CN 103909357A CN 201410138012 A CN201410138012 A CN 201410138012A CN 103909357 A CN103909357 A CN 103909357A
Authority
CN
China
Prior art keywords
cutting
flux
cutting wire
powder
cored
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201410138012.0A
Other languages
Chinese (zh)
Inventor
蒋建敏
王楠
何峰
李小岗
王百泉
贺定勇
周正
王曾洁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing University of Technology
China Railway Tunnel Group Co Ltd CRTG
Original Assignee
Beijing University of Technology
China Railway Tunnel Group Co Ltd CRTG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing University of Technology, China Railway Tunnel Group Co Ltd CRTG filed Critical Beijing University of Technology
Priority to CN201410138012.0A priority Critical patent/CN103909357A/en
Publication of CN103909357A publication Critical patent/CN103909357A/en
Pending legal-status Critical Current

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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
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0211—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in cutting
    • B23K35/0216—Rods, electrodes, wires
    • 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
    • B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
    • B23K35/286—Al 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
    • 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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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Nonmetallic Welding Materials (AREA)

Abstract

The invention relates to a flux-cored cutting wire for closed space cutting under pressure. The flux-cored cutting wire comprises a flux core and a low-carbon steel strip coating. The flux-cored cutting wire is characterized in that the flux core is made with, by weight, 8-26% of Fe3O4, 5-14% of NiO, 0.1-2.5% of potash water glass, 0.6-2.4% of rare earth cerium, and the balance of Al powder; flux powder is evenly screened with a 100-mesh screen. A production process of the flux-cored cutting wire includes the steps of preparing the powder according to a formula and evenly mixing the powder; rolling the low-carbon steel strip coating into a U-channel shape by a former, filling a U channel with the evenly mixed powder, closing a steel strip with a forming roll into a round shape, and drawing and reducing step by step by a drawing machine so as to obtain the flux-cored cutting wire. The flux-cored cutting wire is applicable to closed space cutting under pressure for steel structures, no CO2 is generated, workers' operating time is not prolonged, cutting efficiency is high, and the cost is low.

Description

A kind of medicine core cutting wire for airtight space with pressure cutting
Technical field
The invention belongs to welding and cutting material technology field, relate to a kind of medicine core cutting wire, more particularly, relate to a kind of medicine core cutting wire for airtight space with pressure cutting and preparation method thereof.
Background technology
Shield machine, in the time of underground driving, likely can run into steel pipe or steel plate etc. and be in the way, and shield machine is not moved.At this moment need to enter shield machine soil cabin and manually cut off the barrier such as steel pipe or steel plate.Because shield machine front is a large amount of stone, soil etc., in the cutting process of native cabin, need pressurization, prevent that stone, soil etc. from entering in cabin, in native cabin, pressure is equivalent to the dark pressure of 40-50 rice under water, and native cabin is an airtight space.
The method of at present conventional carbon arc air gouging is cut off the front barrier of shield machine.But in carbon arc production process, be accompanied by the scaling loss of carbon-point, can produce CO 2, the CO producing in confined space 2, can, to operating personnel's healthy generation harmful effect, work as O simultaneously 2consume CO 2when concentration increases to a certain degree, must process atmosphere in native cabin, and change operating personnel.Because pressure in native cabin is too large, before operating personnel enters native cabin and cuts, need to be in the middle of one cabin by pressure in being pressurized to gradually native cabin with environment in adapting to native cabin, general 6 hours consuming time of this process, can greatly reduce operating efficiency so change staff, increase cost.
Patent CN201010536018 provides a kind of material for fast hand cutting, this cutting material is made up of outside incising pipes and inner many hollow tubular structures that form with cutting wire material, wherein said incising pipes is the steel pipe that adopts Forging Technology to be prepared from, and the inside and outside electroplating technology that adopts of steel pipe is respectively coated with the copper plate that 0.1mm is thick; Described cutting wire material length is identical with incising pipes, is made up of crust and powder core, and described crust is low-carbon (LC) 08F steel band; Described powder core by weight percentage, consists of CuO powder 2～8%, cerium 0.4～2%, and surplus is iron powder.But CuO and Fe burn in oxygen, liberated heat is inadequate, causes cutting efficiency low, and this cutting material has complex manufacturing, the shortcoming such as cost is higher.
Patent CN102699556 discloses a kind of cutting material, and this cutting material is made up of outside incising pipes and many inner cutting wire materials, and there is a layer insulating in cutting pipe outside; Cutting wire material is made up of crust and powder core, and described crust is aluminium strip, and described powder core one percentage by weight note, consists of Fe 2o 3: 5～25%, surplus is Al powder, wherein: described Fe 2o 3granularity is-80～200 orders, and aluminum powder particle size is-80～200 orders; Described insulating barrier is the epoxy resin layer that is wrapped in the polyethylene glue belt in incising pipes outside or is coated in incising pipes outside.This cutting material crust is aluminium strip, and cost is higher, and complex manufacturing.
The present invention, take thermit reaction as basis, utilizes the electric arc thermite that ignites, and realizes cutting thereby emit a large amount of heat, in cutting gun, be used for logical Oxygen Flow with aperture, by burning, by the active force of the air-flow oxidizing slag that blows off, thereby formation scarfing, separates cut material.
Summary of the invention
The object of the invention is, in order to solve and to overcome the existing problem of prior art and defect in airtight space with pressure cutting, to realize in airtight space with pressure, metal to be carried out to fly-cutting, and do not produce CO 2, and a kind of medicine core cutting wire for airtight space with pressure cutting and preparation method thereof is provided.
In order to achieve the above object, the medicine core cutting wire crust of invention is mild-carbon steel strip, and powder core is made up of various medicinal powder.Utilize the electric arc aluminothermy alloy that ignites, the high heat that thermit reaction discharges is used for heating and melt cut metal; Utilize in cutting gun the logical Oxygen Flow of aperture, by burning, by the active force of the air-flow oxidizing slag that blows off, thereby form scarfing; By adding appropriate arc stabilizer, improve the combustion stability of electric arc, cutting can be carried out continuously; Can improve the efficiency of combustion of cutting material by adding cerium, when cerium exceedes when a certain amount of, substantially constant to the raising of efficiency of combustion, and consider the expensive and Cost Problems of rare earth, the content of cerium is 0.6～2.4%.
Concrete technical scheme of the present invention is:
For a medicine core cutting wire for airtight space with pressure cutting, formed by crust and medicine core, it is characterized in that, described crust is mild-carbon steel strip, described medicine core by mass percentage, consists of Fe 3o 4: 8～26%, NiO:5～14%, KP1: 0.1～2.5%, cerium: 0.6～2.4%, surplus Al powder.The particle diameter of described medicinal powder was 100 mesh sieves.
Described crust mild-carbon steel strip, thickness is 0.4～0.6mm
The preparation method of above-mentioned a kind of medicine core cutting wire for airtight space with pressure cutting, its step is as follows:
1, the configuration of alloy and mineral powder: powder is weighed in the ratio of formula Design, and mix, then put into the dust feeder of powder core wire forming machine.
2, the roll forming of silk material: steel band forms U-lag after the rolling of several roads roll, the medicinal powder mixing is filled in U-shaped groove, then steel band is closed into circle after format roll.
3, wire drawing: adopt wire drawing machine by road drawing, tube reducing, obtain medicine core cutting wire.
The present invention compared with prior art, its beneficial effect mainly:
1) the medicine core cutting wire of the present invention's development does not produce CO in cutting process 2, can not exert an influence to staff's health, staff is increased the activity duration in native cabin, greatly improve operating efficiency, reduce cost of labor.
2) utilize thermit reaction Al and Fe 3o 4and NiO reaction emits a large amount of heat, heating and melting be cut material, provide and there is certain pressure Oxygen Flow by burning by cutting gun, and slag is blown off, thus formation scarfing, and cutting effect is good.
3) KP1, as the arc stabilizer in medicine core, is conducive to improve the stability of arc burning under cutting with pressure; The efficiency of combustion that can improve cutting material by adding cerium, further improves cutting efficiency.
4) cutting efficiency is high, and cutting material burning can reach more than 5000 ℃, and cutting efficiency is the more than 10 times of oxy-acetylene cutting, has higher cutting speed.
The specific embodiment
Below by embodiment, a kind of medicine core cutting wire for airtight space with pressure cutting of the present invention and preparation method thereof is described in further detail.
Embodiment 1
One, drug core component proportioning
By mass percentage, take 8% Fe 3o 4, 14% NiO, 1.6% KP1,0.8% cerium, all the other are Al powder.
Two, preparation method
1, medicinal powder is mixed, cross 100 mesh sieve;
2, choosing thickness is that the H08A mild-carbon steel strip of 0.5mm does crust, is bundled into U-shaped groove shape;
3, the medicinal powder mixing is filled in U-shaped groove, then steel band is closed into circle after format roll.
4, employing wire drawing machine is by medicine core cutting wire respectively by the wire drawing die of different-diameter, and by road drawing, tube reducing, finally obtaining diameter is the medicine core cutting wire of 2.2mm.
Three, experimental result
The medicine core cutting wire that this example makes is under 450～500A, the killer voltage condition that is 45～50V at cutting current, the Q235 steel of 20mm thickness is carried out to cutting test in pressure storehouse, under the operating mode that is 5.0mm/s at maximum cutting rate, there is not current interruption and occur bridging, dross phenomenon.
Embodiment 2
By mass percentage, take 17% Fe 3o 4, 10% NiO, 1.6% KP1,1.6% cerium, all the other are Al powder.
The H08A mild-carbon steel strip of choosing thickness and be 0.5mm does crust, is prepared and obtains the medicine core cutting wire that diameter is 2.2mm according to the preparation method of example 1.
The medicine core cutting wire that this example makes is under 450～500A, the killer voltage condition that is 45～50V at cutting current, the Q235 steel of 20mm thickness is carried out to cutting test in pressure storehouse, under the operating mode that is 6.0mm/s at maximum cutting rate, there is not current interruption and occur bridging, dross phenomenon.
Example 3
By mass percentage, take 26% Fe 3o 4, 5% NiO, 1.6% KP1,2.4% cerium, all the other are Al powder.
The H08A mild-carbon steel strip of choosing thickness and be 0.5mm does crust, is prepared and obtains the medicine core cutting wire that diameter is 2.2mm according to the preparation method of example 1.
The medicine core cutting wire that this example makes is under 450～500A, the killer voltage condition that is 45～50V at cutting current, the Q235 steel of 20mm thickness is carried out to cutting test in pressure storehouse, under the operating mode that is 5.6mm/s at maximum cutting rate, there is not current interruption and occur bridging, dross phenomenon.

Claims (3)

1. for a medicine core cutting wire for airtight space with pressure cutting, be made up of crust and medicine core, it is characterized in that, described medicine core by mass percentage, consists of Fe 3o 4: 8～26%, NiO:5～14%, KP1: 0.1～2.5%, cerium: 0.6～2.4%, surplus Al powder.
2. the medicine core cutting wire for airtight space with pressure cutting according to claim 1, is characterized in that, the particle diameter of described medicine core was 100 mesh sieves.
3. the medicine core cutting wire for airtight space with pressure cutting according to claim 1, is characterized in that, described crust is mild-carbon steel strip, and thickness is 0.4～0.6mm.
CN201410138012.0A 2014-04-08 2014-04-08 Flux-cored cutting wire for closed space cutting under pressure Pending CN103909357A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410138012.0A CN103909357A (en) 2014-04-08 2014-04-08 Flux-cored cutting wire for closed space cutting under pressure

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Application Number Priority Date Filing Date Title
CN201410138012.0A CN103909357A (en) 2014-04-08 2014-04-08 Flux-cored cutting wire for closed space cutting under pressure

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104722960A (en) * 2015-03-24 2015-06-24 江苏科技大学 High-efficiency heat production flux-cored cutting wire for underwater wet-type arc cutting and preparation method thereof

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1054734A (en) * 1990-03-13 1991-09-25 鞍山钢铁公司 Deposit-metal-type thermit for welding-up ingot mould
US20030052112A1 (en) * 2001-04-09 2003-03-20 Kiswel Ltd. Flux cored wire for gas shielded arc welding
CN101444876A (en) * 2008-11-20 2009-06-03 清华大学 Manual thermit welding electrode and preparation and using methods thereof
CN102049630A (en) * 2010-11-09 2011-05-11 衣衍亮 Material for fast hand cutting and application thereof
CN102198570A (en) * 2011-05-06 2011-09-28 中国电力科学研究院 Heating welding flux of copper-coated steel/steel grounding network
CN102699552A (en) * 2012-01-12 2012-10-03 柳吉兰 Underwater manual rapid cutting material
CN102699557A (en) * 2012-01-12 2012-10-03 柳吉兰 Underwater manual quick cutting material and application thereof
CN103182609A (en) * 2011-12-27 2013-07-03 中国人民解放军军械工程学院 Combustion jet cutter used for steel structure member cutting

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1054734A (en) * 1990-03-13 1991-09-25 鞍山钢铁公司 Deposit-metal-type thermit for welding-up ingot mould
US20030052112A1 (en) * 2001-04-09 2003-03-20 Kiswel Ltd. Flux cored wire for gas shielded arc welding
CN101444876A (en) * 2008-11-20 2009-06-03 清华大学 Manual thermit welding electrode and preparation and using methods thereof
CN102049630A (en) * 2010-11-09 2011-05-11 衣衍亮 Material for fast hand cutting and application thereof
CN102198570A (en) * 2011-05-06 2011-09-28 中国电力科学研究院 Heating welding flux of copper-coated steel/steel grounding network
CN103182609A (en) * 2011-12-27 2013-07-03 中国人民解放军军械工程学院 Combustion jet cutter used for steel structure member cutting
CN102699552A (en) * 2012-01-12 2012-10-03 柳吉兰 Underwater manual rapid cutting material
CN102699557A (en) * 2012-01-12 2012-10-03 柳吉兰 Underwater manual quick cutting material and application thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104722960A (en) * 2015-03-24 2015-06-24 江苏科技大学 High-efficiency heat production flux-cored cutting wire for underwater wet-type arc cutting and preparation method thereof

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Application publication date: 20140709