CN102049630B - Material for fast hand cutting and application thereof - Google Patents
Material for fast hand cutting and application thereof Download PDFInfo
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- CN102049630B CN102049630B CN 201010536018 CN201010536018A CN102049630B CN 102049630 B CN102049630 B CN 102049630B CN 201010536018 CN201010536018 CN 201010536018 CN 201010536018 A CN201010536018 A CN 201010536018A CN 102049630 B CN102049630 B CN 102049630B
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- 238000005520 cutting process Methods 0.000 title claims abstract description 125
- 239000000463 material Substances 0.000 title claims abstract description 100
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000000843 powder Substances 0.000 claims abstract description 34
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 28
- 239000010959 steel Substances 0.000 claims abstract description 28
- 238000005516 engineering process Methods 0.000 claims abstract description 17
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 13
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 13
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 12
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052802 copper Inorganic materials 0.000 claims abstract description 12
- 239000010949 copper Substances 0.000 claims abstract description 12
- 238000005242 forging Methods 0.000 claims abstract description 12
- 238000009713 electroplating Methods 0.000 claims abstract description 9
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 13
- 239000004567 concrete Substances 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 239000007769 metal material Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 229910052717 sulfur Inorganic materials 0.000 claims description 5
- 239000011449 brick Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 239000011435 rock Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 13
- 239000011150 reinforced concrete Substances 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 12
- 229910052760 oxygen Inorganic materials 0.000 description 12
- 239000001301 oxygen Substances 0.000 description 12
- 238000002485 combustion reaction Methods 0.000 description 10
- 239000000567 combustion gas Substances 0.000 description 5
- QFXZANXYUCUTQH-UHFFFAOYSA-N ethynol Chemical group OC#C QFXZANXYUCUTQH-UHFFFAOYSA-N 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 5
- 229920000049 Carbon (fiber) Polymers 0.000 description 3
- 239000004917 carbon fiber Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 206010033799 Paralysis Diseases 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000002459 sustained effect Effects 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
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Abstract
The invention discloses a material for fast hand cutting and an application thereof. The material has a hollow tubular structure formed by an external cutting pipe and a plurality of internal cutting wires, wherein the cutting pipe is a steel pipe manufactured through a forging technology, and the inside and the outside of the steel pipe are plated with copper layers with the thicknesses of 0.1mm with an electroplating technology; the cutting wire has the same length as the cutting pipe and comprises a sheath and a powder core, wherein the sheath is a low carbon steel 08F steel belt; and the powder core comprises the following components by weight percent: 2-8% of CuO powder, 0.4-2% of rare earth cerium, and the balance of iron powder. The material is used for fast cutting and breaking of reinforced concrete during the earthquake relief process and has the advantages that cutting gas and a cutting power supply are not needed, the cutting efficiency is high, the carrying is convenient and safe, the operation is convenient and the cost is low.
Description
Technical field
The invention belongs to the metal material cutting technique field that is used for manual fly-cutting, relate to a kind of manual fly-cutting material.
Background technology
China is the multiple country of an earthquake, and earthquake causes road interruption, electric power facility paralysis, house collapse, and a large amount of masses are crushed under house, the rubble.Need in 72 hours golden period, will pressed the masses to give treatment to out timely fast, yet the road that earthquake causes interrupts making main equipment in time to arrive earthquake field carry out disaster relief work.Simultaneously, some equipment that need livewire work are also because the paralysis of electric power facility can't be carried out rescue work.The main method of the disaster relief still is the manual disaster relief now; The instrument that disaster relief personnel use also mainly is pick, crowbar, spade etc., and building mainly adopts armored concrete to build, though concrete has ruptured in seismic process; But link together by reinforcing bar, brought great difficulty to rescue work.Now, firefighters mainly adopts reinforced shear, oxy-acetylene flame cutting method to cut off reinforcing bar, but these two kinds of method efficient are all very low; And can only cut metal, there sometimes have the coated reinforcing bar of concrete to cut to the outside to be just powerless, needs the rescue personnel to break the concrete of outside; Spill reinforcing bar; Could adopt reinforced shear, oxy-acetylene flame cutting reinforcing bar, the time with good conditionsi, also can adopt giant that the concrete of outside is got rid of; Cut, both of these case has further reduced the efficient of cutting, has delayed rescue time again.
Summary of the invention
The present invention is directed to the defective of various technology in the existing earthquake relief work process; Utilize the combustion characteristics of exothermic material in oxygen, a kind of need not to cut combustion gas and cutting power supply are provided, cutting efficiency is high; The cutting object scope is wide; Easy to carry, safety, simple to operate and manual fly-cutting material that cost is low is used for the fly-cutting of earthquake relief work process armored concrete and cracks.
Utilize heat release alloy CuO and the Fe liberated heat that in oxygen, burns just can support that cutting material can continual burning; And need not utilize electrical source of power or combustion gas, thus a kind of need not to cut combustion gas and cutting power supply are provided, cutting efficiency is high; The cutting object scope is wide; Easy to carry, safety, the low cutting material of simple to operate and cost is used for the fly-cutting of earthquake relief work process armored concrete and cracks.
A kind of manual fly-cutting material; Incising pipes by the outside cuts the hollow tubular structure that a material is formed with inner many undercuts; Wherein said incising pipes length is 600mm, is the steel pipe that adopts Forging Technology to be prepared from, and the inside and outside electroplating technology that adopts of steel pipe respectively is coated with the thick copper plate of 0.1mm; Said cutting silk material length is 600mm, is made up of crust and powder core, and said crust is a mild steel 08F steel band; Its chemical composition is: by weight percentage, C 0.05%～0.11%, Si≤0.03%; Mn 0.25%～0.50%, P≤0.035%, S≤0.035%; Ni≤0.25%, Cr≤0.10%, all the other are iron and unavoidable impurities; Said powder core consists of CuO powder 2～8% by weight percentage, rare earth cerium 0.4～2%, and surplus is an iron powder.
Said iron particle size is-80 orders, and CuO powder degree is-80～200 orders, and rare earth cerium granularity is-300 orders.
A kind of application of manual fly-cutting material is applied to the cutting of metal material or nonmetallic materials.
The adding of cutting CuO powder in the silk material among the present invention is to utilize CuO and iron reaction to emit a large amount of heats, supports carrying out smoothly of cutting.When CuO grain weight amount percentage less than 2% the time, liberated heat is few, cutting speed is less, and when CuO powder weight ratio greater than 8% the time, CuO and iron reaction are violent, burning velocity is too fast, is not easy control.
The adding of rare earth cerium can improve the efficiency of combustion of cutting material, promotes cutting material fully burning in oxygen.When rare earth cerium percentage by weight less than 0.4% the time, very little to the raising effect of efficiency of combustion, in the 0.4-2% scope; Along with the increase of rare earth cerium weight ratio, also increasing to the raising of efficiency of combustion, but surpass 2%; To the raising of efficiency of combustion with 2% compare change little; And rare earth cerium price is higher, in order to practice thrift cost, elects 0.4-2% as.
The diameter of said cutting silk material and the ratio scope of the wall thickness of incising pipes are 2.1～3.
" manual fly-cutting material " of the present invention is meant with traditional cutting method such as oxy-acetylene flame cutting and compares that its cutting speed is many soon, is about 3-8 doubly.
A kind of preparation method who is used for the cutting silk material of manual fly-cutting material; With the batch mixing mixer iron powder, CuO powder and rare earth alloy powder are mixed by proportioning earlier; And be ready to the 08F steel band, then through multi-functional powder cored filament material make-up machine, adopt the continuous hot candied tube reducing method of multiple roll continuous rolling and multiple tracks to make; Through sanction band, roll band, fill out powder, seal, sequence such as wire drawing, alignment, shearing, a material gets product.
The speed of preparation silk material is 10-30m/min, if throwing speed is slow, efficient is low, and throwing speed is fast, breaks a material easily.The alignment of silk material is carried out on silk material straightener, and alignment speed is about 5-22m/min; If alignment speed is slow, alignment efficient is low, and alignment speed is fast, and the alignment of silk material does not reach requirement, the assembling of influence and incising pipes.In alignment process, to heat the silk material earlier, firing equipment adopts the tubulose moderate oven; Heating-up temperature 200-400 ℃; The purpose of heating is to be convenient to a material alignment, lets a material pass the tubulose moderate oven, after the heating; Get into silk material straightener and carry out alignment, the silk material that is cut into certain-length at last is so that assemble with tubing.
Incising pipes cooperates requirement with the size that is equipped with of cutting silk material; Not so can cause incising pipes and cut the asynchronous of silk material burning; The rule that we draw be the ratio scope of wall thickness of diameter and incising pipes of cutting silk material between 2.1～3, the burning synchronism is better.Like this, adopt the tubing of different size, interior dress diameter, the different cutting of a radical material can be assembled into the manual fly-cutting material of different size, cut.Be the dimensions of concrete several kinds of manual fly-cutting materials below:
Specification 1:
Select the forging and pressing seamless steel pipe of the about 0.7mm of wall thickness for use, adopt electroplating technology again, outer within it both sides plate the copper plate of thick approximately 0.1mm, prepare to have copper-composite pipe of iron/copper three-decker.The total wall thickness of tubing is about 0.9mm; Internal diameter 5.2mm, external diameter 7mm, the incising pipes of preparation are about and are 600mm.
Cutting silk material diameter is 2.4mm, is about to be 600mm, and totally 3 are assemblied in the incising pipes.
Specification 2:
Select the forging and pressing seamless steel pipe of the about 0.8mm of wall thickness for use, adopt electroplating technology again, outer within it both sides plate the copper plate of thick approximately 0.1mm, prepare to have copper-composite pipe of iron/copper three-decker.The total wall thickness of tubing is about 1mm; Internal diameter 6.6mm, external diameter 8.6mm, the incising pipes of preparation are about and are 600mm.
Cutting silk material diameter is 2.4mm, is about to be 600mm, and totally 5 are assemblied in the incising pipes.
Specification 3:
Select the forging and pressing seamless steel pipe of the about 0.8mm of wall thickness for use, adopt electroplating technology again, outer within it both sides plate the copper plate of thick approximately 0.1mm, prepare to have copper-composite pipe of iron/copper three-decker.The total wall thickness of tubing is about 1mm; Internal diameter 8mm, external diameter 10mm, the incising pipes of preparation are about and are 600mm.
Cutting silk material diameter is 2.4mm, is about to be 600mm, and totally 7 are assemblied in the incising pipes.
Figure of description
Wherein, 1-incising pipes; 2-cutting silk material; The 3-crust; 4-powder core;
Accompanying drawing 2 is sketch mapes of manual fly-cutting system;
Wherein, 1-cut workpiece; The manual fly-cutting material of 2-; The 3-cutting gun; 4-oxygen gas circuit; 5-carbon fiber fire-fighting oxygen cylinder;
Accompanying drawing 5 is cross sectional representation of the manual fly-cutting material of specification 3.
The specific embodiment
Through following instance earthquake relief work is further described with the fly-cutting material.
As shown in Figure 2, the manual fly-cutting material 2 of cutting gun 3 clampings, carbon fiber fire-fighting oxygen cylinder 5 is given cutting gun 3 oxygen supply gas through gas circuit 4.
At first, open the oxygen control valve on the cutting gun 3 a little, minor amounts of oxygen is through oxygen gas circuit 4; The cutting gun 3 of flowing through flows into the manual fly-cutting material 2 of hollow; Then, manual fly-cutting material 2 at the batten up-igniting of lighting, and is strengthened the oxygen supply amount; Until the burning of manual fly-cutting material settling out, more manual fly-cutting material 2 is moved to workpiece 1 and cut.
Below in conjunction with embodiment and accompanying drawing the present invention is described further:
Manual fly-cutting material; Incising pipes by the outside cuts the hollow tubular structure that a material is formed with 3 inner undercuts; Wherein said incising pipes length is 600mm, is the steel pipe that adopts Forging Technology to be prepared from, and the inside and outside electroplating technology that adopts of steel pipe respectively is coated with the thick copper plate of 0.1mm; Said cutting silk material length is 600mm, is made up of crust and powder core, and said crust is a mild steel 08F steel band; Its chemical composition is: by weight percentage, C 0.05%～0.11%, Si≤0.03%; Mn 0.25%～0.50%, P≤0.035%, S≤0.035%; Ni≤0.25%, Cr≤0.10%, all the other are iron and unavoidable impurities; The composition and the content of said powder core are as shown in table 1.
Table 1
| Powder core composition | Percentage by weight % |
| The |
3％ |
| The |
1％ |
| Iron powder | Surplus |
The manual fly-cutting material that the powder core of the said component of employing table 1 is prepared from carries out cutting test to the 45# steel plate of thick 20mm, and cutting speed is 5.3mm/s.
Manual fly-cutting material; Incising pipes by the outside cuts the hollow tubular structure that a material is formed with 5 inner undercuts; Wherein said incising pipes length is 600mm, is the steel pipe that adopts Forging Technology to be prepared from, and the inside and outside electroplating technology that adopts of steel pipe respectively is coated with the thick copper plate of 0.1mm; Said cutting silk material length is 600mm, is made up of crust and powder core, and said crust is a mild steel 08F steel band; Its chemical composition is: by weight percentage, C 0.05%～0.11%, Si≤0.03%; Mn 0.25%～0.50%, P≤0.035%, S≤0.035%; Ni≤0.25%, Cr≤0.10%, all the other are iron and unavoidable impurities; The composition and the content of said powder core are as shown in table 2.
Table 2
| Powder core composition | Percentage by weight % |
| The CuO powder | 5％ |
| The |
1％ |
| Iron powder | Surplus |
The manual fly-cutting material that the powder core of the said component of employing table 2 is prepared from carries out cutting test to the 45# steel plate of thick 20mm, and cutting speed is 5.9mm/s.
Manual fly-cutting material; Incising pipes by the outside cuts the hollow tubular structure that a material is formed with 7 inner undercuts; Wherein said incising pipes length is 600mm, is the steel pipe that adopts Forging Technology to be prepared from, and the inside and outside electroplating technology that adopts of steel pipe respectively is coated with the thick copper plate of 0.1mm; Said cutting silk material length is 600mm, is made up of crust and powder core, and said crust is a mild steel 08F steel band; Its chemical composition is: by weight percentage, C 0.05%～0.11%, Si≤0.03%; Mn 0.25%～0.50%, P≤0.035%, S≤0.035%; Ni≤0.25%, Cr≤0.10%, all the other are iron and unavoidable impurities; The composition and the content of said powder core are as shown in table 3.
Table 3
| Powder core composition | Percentage by weight % |
| The CuO powder | 8％ |
| The rare earth cerium | 1.5％ |
| Iron powder | Surplus |
The manual fly-cutting material that the powder core of the said component of employing table 3 is prepared from carries out cutting test to the 45# steel plate of thick 20mm, and cutting speed is 8.27mm/s.
The beneficial effect that manual fly-cutting material provided by the invention is brought is following:
1) portability adopts fire-fighting light with the oxygen supply of carbon fiber oxygen cylinder, used diced system and cutting material, singlely just can carry, and does not receive the influence of the road interruption that earthquake causes;
2) do not need cutting power supply and cutting combustion gas; This method is by the comburant oxygen effect; Utilize the further sustained combustion of the manual fly-cutting material of manual fly-cutting material combustion self liberated heat support to cut; Do not need cutting power supply and cutting combustion gas, can cut workpiece with the batten of the lighting manual fly-cutting material that just can ignite.
3) cutting efficiency is high, and manual fly-cutting material combustion can reach the high temperature more than 5000 ℃, and cutting efficiency is 3-8 a times of oxy-acetylene flame cutting, has higher cutting speed, can shorten clipping time, reduces rescue time, improves rescue speed.
4) the cutting object scope is wide; Manual fly-cutting material is to utilize the liberated heat of material combustion own to support the further sustained combustion of cutting material; Therefore, receive the restriction of institute's cutting object material composition, can cut all metal materials unlike the oxy-acetylene flame that kind; Also can cut nonmetallic materials such as concrete, brick and rock, the cutting object scope is wide.
5) cost is low, and this craft fly-cutting material does not need complex apparatus, and used powder core composition is mainly iron, and therefore, manufacturing cost is lower.
Claims (10)
1. manual fly-cutting material; It is characterized in that: have the cutting material that cuts the hollow tubular structure that a material forms by the incising pipes of outside and inner many undercuts; 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 respectively is coated with the thick copper plate of 0.1mm; Said cutting silk material length is identical with incising pipes, is made up of crust and powder core, and said crust is a mild steel 08F steel band; Its chemical composition is: by weight percentage, C 0.05%～0.11%, Si≤0.03%; Mn 0.25%～0.50%, P≤0.035%, S≤0.035%; Ni≤0.25%, Cr≤0.10%, all the other are iron and unavoidable impurities; Said powder core consists of CuO powder 2～8% by weight percentage, rare earth cerium 0.4～2%, and surplus is an iron powder.
2. manual fly-cutting material as claimed in claim 1, it is characterized in that: said iron particle size is-80 orders, and CuO powder degree is-80～200 orders, and rare earth cerium granularity is-300 orders.
3. manual fly-cutting material according to claim 1 or claim 2 is characterized in that: the diameter of said cutting silk material and the ratio scope of the wall thickness of incising pipes are 2.1～3.
4. manual fly-cutting material according to claim 1 or claim 2, it is characterized in that: said incising pipes is the forging and pressing seamless steel pipe of wall thickness 0.7mm, and total wall thickness is 0.9mm, internal diameter 5.2mm, external diameter 7mm, length is 600mm; Said cutting silk material diameter is 2.4mm, and totally 3 are assemblied in the incising pipes.
5. manual fly-cutting material according to claim 1 or claim 2, it is characterized in that: said incising pipes is the forging and pressing seamless steel pipe of wall thickness 0.8mm, and total wall thickness is 1mm, internal diameter 6.6mm, external diameter 8.6mm, length is 600mm; Said cutting silk material diameter is 2.4mm, and totally 5 are assemblied in the incising pipes.
6. manual fly-cutting material according to claim 1 or claim 2, it is characterized in that: said incising pipes is the forging and pressing seamless steel pipe of wall thickness 0.8mm, and total wall thickness is 1mm, internal diameter 8mm, external diameter 10mm, length is 600mm; Said cutting silk material diameter is 2.4mm, and totally 7 are assemblied in the incising pipes.
7. application like the arbitrary described manual fly-cutting material of claim 1-6 is characterized in that: be applied to the cutting of metal material or nonmetallic materials.
8. the application of a manual fly-cutting material as claimed in claim 7 is characterized in that: be applied to the cutting of metal material in the earthquake relief work or nonmetallic materials.
9. the application of a manual fly-cutting material as claimed in claim 8 is characterized in that: be applied to the cutting of nonmetallic materials in the earthquake relief work.
10. the application of a manual fly-cutting material as claimed in claim 9 is characterized in that: said nonmetallic materials are concrete, brick or rock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010536018 CN102049630B (en) | 2010-11-09 | 2010-11-09 | Material for fast hand cutting and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010536018 CN102049630B (en) | 2010-11-09 | 2010-11-09 | Material for fast hand cutting and application thereof |
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|---|---|
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| CN102049630B true CN102049630B (en) | 2012-12-12 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699544B (en) * | 2012-01-12 | 2015-02-11 | 柳吉兰 | Cutting system accomplishing cutting by using underwater manual rapid cutting material |
| CN102699559B (en) * | 2012-01-12 | 2015-05-06 | 柳吉兰 | Method for manufacturing underwater manual quick cutting material |
| CN102699557B (en) * | 2012-01-12 | 2015-05-06 | 柳吉兰 | Underwater manual quick cutting material and application thereof |
| CN102699556B (en) * | 2012-01-12 | 2015-05-06 | 柳吉兰 | Underwater cutting material |
| CN102699552B (en) * | 2012-01-12 | 2015-05-06 | 柳吉兰 | Underwater manual rapid cutting material |
| CN102699543B (en) * | 2012-01-12 | 2015-02-11 | 柳吉兰 | Method for completing underwater cutting by aid of cutting system |
| CN103909357A (en) * | 2014-04-08 | 2014-07-09 | 北京工业大学 | Flux-cored cutting wire for closed space cutting under pressure |
| CN105921913A (en) * | 2016-06-28 | 2016-09-07 | 哈尔滨工业大学（威海） | Flux core cutting wire for underwater cutting |
| CN115229376B (en) * | 2021-11-10 | 2023-09-05 | 北京汉锐益新科技有限公司 | Rope-shaped metal cutting material for underwater thermal cutting |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4689461A (en) * | 1985-09-25 | 1987-08-25 | Eutectic Corporation | Cored tubular electrode and method for the electric-arc cutting of metals |
| CN101444876A (en) * | 2008-11-20 | 2009-06-03 | 清华大学 | Manual thermit welding electrode and preparation and using methods thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030145752A1 (en) * | 2002-02-05 | 2003-08-07 | Greg Carter | Portable metal cutting pyrotechnic torch |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4689461A (en) * | 1985-09-25 | 1987-08-25 | Eutectic Corporation | Cored tubular electrode and method for the electric-arc cutting of metals |
| CN101444876A (en) * | 2008-11-20 | 2009-06-03 | 清华大学 | Manual thermit welding electrode and preparation and using methods thereof |
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