WO2014024558A1 - Gaz combustible et procédé de découpe par fusion d'un matériau à base d'acier - Google Patents

Gaz combustible et procédé de découpe par fusion d'un matériau à base d'acier Download PDF

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Publication number
WO2014024558A1
WO2014024558A1 PCT/JP2013/065752 JP2013065752W WO2014024558A1 WO 2014024558 A1 WO2014024558 A1 WO 2014024558A1 JP 2013065752 W JP2013065752 W JP 2013065752W WO 2014024558 A1 WO2014024558 A1 WO 2014024558A1
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WO
WIPO (PCT)
Prior art keywords
gas
steel material
volume
ethylene
methane
Prior art date
Application number
PCT/JP2013/065752
Other languages
English (en)
Japanese (ja)
Inventor
吉田　佳史
清之 三品
誠 伴
横田　忠男
Original Assignee
岩谷瓦斯株式会社
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 岩谷瓦斯株式会社 filed Critical 岩谷瓦斯株式会社
Publication of WO2014024558A1 publication Critical patent/WO2014024558A1/fr

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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
    • B23K7/00—Cutting, scarfing, or desurfacing by applying flames
    • B23K7/10—Auxiliary devices, e.g. for guiding or supporting the torch
    • 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
    • B23K35/38—Selection of media, e.g. special atmospheres for surrounding the working area
    • 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
    • B23K7/00—Cutting, scarfing, or desurfacing by applying flames
    • B23K7/002—Machines, apparatus, or equipment for cutting plane workpieces, e.g. plates
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
    • C10L3/02—Compositions containing acetylene
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
    • C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/18—Sheet panels
    • 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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/02—Iron or ferrous alloys
    • B23K2103/04—Steel or steel alloys
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
    • C10L3/003—Additives for gaseous fuels

Definitions

  • the present invention relates to a flammable gas and a method for fusing steel, and more particularly to a flammable gas containing methane gas and ethylene, and a method for fusing steel using the flammable gas.
  • Acetylene (C 2 H 2 ) is widely used as a combustion gas in gas pressure welding, gas fusing, gas welding, brazing, and the like. Acetylene is excellent in burning rate and burning strength and is suitable as a combustion gas.
  • acetylene may decompose and explode if stored and transported in a compressed gas state. Therefore, acetylene is stored and transported in a dissolved gas state dissolved in a solvent such as acetone or dimethylformamide. As a result, acetylene has problems such as being unsuitable for mass transportation using a collection container or a large container.
  • the present invention has been made in order to cope with such a problem, and the object thereof is to combust a flammable gas that can be used as a substitute gas for acetylene for fusing of a steel material, and for fusing a steel material using the flammable gas.
  • the “methane-based gas” means a gas containing methane as a main component, including pure methane and natural gas which is a gas mainly containing methane.
  • the “natural gas” is a gas defined in JIS K2301 and means a gas mainly composed of methane produced in nature.
  • the component composition is mainly composed of methane, and includes gaseous hydrocarbons, hydrogen, helium, carbon monoxide, carbon dioxide, oxygen and nitrogen. More specifically, general natural gas is mainly composed of about 90% by volume of methane, contains ethane, propane and butane, and other components are less than 1% by volume.
  • the flammable gas according to the present invention is a flammable gas used as a combustion gas for melting a steel material.
  • This combustible gas contains not less than 36% by volume and not more than 44% by volume of ethylene, and the balance is composed of methane-based gas and inevitable impurities.
  • the present inventor has studied a method for reducing notches generated on a cut surface of a steel material when the steel material is cut using a combustion gas based on a methane-based gas. As a result, it has been found that generation of notches on the cut surface can be effectively suppressed by mixing ethylene with methane-based gas and appropriately adjusting the mixing ratio of methane-based gas and ethylene. More specifically, the generation of notches in the cross section can be effectively suppressed by mixing ethylene with the methane-based gas at a mixing ratio of 36% by volume to 44% by volume.
  • the combustible gas of the present invention it is possible to provide a combustible gas that can be applied as a substitute gas for acetylene for fusing steel materials.
  • the combustible gas may be sealed in a container, and the pressure in the container may be 1 MPa or more and 14.7 MPa or less at 35 ° C.
  • the combustible gas of the present invention may be manufactured and used by mixing ethylene gas and methane-based gas such as pure methane or natural gas at a place where the steel material is melted.
  • the combustible gas of the present invention is manufactured by mixing ethylene gas and methane-based gas in advance, and after being sealed in the container, up to the place where the steel material is melted while being held in the container It may be transported and used. In this case, in order to achieve efficient transportation, it is preferable to increase the pressure in the container. However, if the pressure is increased too much, ethylene may be liquefied at a low temperature and it may be difficult to obtain a desired mixing ratio of ethylene and methane-based gas at the time of use.
  • the pressure in the container By setting the pressure in the container to 1 MPa or higher and 14.7 MPa or lower at 35 ° C., occurrence of such a problem can be suppressed and efficient transportation can be achieved.
  • the pressure in the container is preferably 5 MPa or more at 35 ° C., more preferably 10 MPa or more.
  • the steel material fusing method according to the present invention is a steel material fusing method in which a combustible gas is used as a combustion gas to cut the steel material.
  • the combustible gas used in this steel material fusing method contains not less than 36% by volume and not more than 44% by volume of ethylene, and the balance is composed of methane-based gas and inevitable impurities.
  • the steel material fusing method of the present invention it is possible to perform fusing of a steel material in which the occurrence of notches on the cut surface is effectively suppressed without using acetylene as a combustion gas.
  • a flammable gas applicable as an alternative gas for acetylene for fusing steel material, and a steel material using the flammable gas A fusing method can be provided.
  • the combustible gas in this Embodiment can be manufactured by filling containers, such as a cylinder, as follows, for example. First, the inside of the container to be filled with combustible gas is depressurized to a desired level. Next, ethylene gas is supplied into the container, and ethylene is contained in the container so that the pressure in the container becomes a pressure necessary for the ratio of ethylene in the combustible gas to be 36% by volume or more and 44% by volume or less. Filled.
  • a methane gas such as methane gas or natural gas is supplied into the container filled with ethylene as described above, and the pressure in the container is such that the proportion of ethylene in the combustible gas is not less than 36% by volume and not more than 44% by volume.
  • the vessel is filled with a methane-based gas so that the pressure required for this is achieved.
  • the combustible gas which contains 36 volume% or more and 44 volume% or less ethylene, and a remainder consists of methane-type gas and an unavoidable impurity is filled in a container.
  • the pressure in the said container is 1 MPa or more and 14.7 MPa or less in 35 degreeC. In this way, when the container is filled with the combustible gas, the container can be transported, and can be easily applied as a combustion gas to the melting of the steel material.
  • the fusing of the steel material using the combustion gas can be performed as follows. Referring to FIG. 1, first, a material to be cut made of steel such as mild steel is prepared (S10). Next, the burner having a crater at the tip is supplied with the mixed gas of combustible gas and oxygen of the above-described embodiment filled in a container such as a cylinder, and a flame is formed by igniting this. (S20). Then, while the material to be cut is heated by this flame, cutting oxygen is supplied from the crater at the tip of the burner. Thereby, a part of the material to be cut burns, and a part of the material to be cut is melted by the combustion heat, and a part melted by the supplied gas flow is removed. Then, by moving the crater of the burner relative to the material to be cut, the above phenomenon proceeds continuously, and the material to be cut is cut (S30).
  • the cutting of the steel material may be performed automatically using a robot or the like, or may be performed manually by an operator.
  • the relative moving speed of the crater with respect to the steel material (material to be cut) can be set to 100 mm / min or more and 650 mm / min or less, for example.
  • the groove angle at the time of fusing can be set to 0 ° or more and 45 ° or less, for example.
  • a mixed gas of methane gas and ethylene with an ethylene content of 18 to 50% by volume was prepared, and an experiment was conducted to melt the steel material and confirm the state of the cut surface.
  • the cutting speed (relative speed of the crater with respect to the steel material) was 450 mm / min, the groove angle was 30 °, the distance between the crater and the steel material along the direction of the crater was 10 mm, and the steel material made of SS400, which was mild steel, was cut.
  • the thickness of the steel material is 25 mm.
  • the experimental results are shown in Table 1 and FIGS. 2, 3, 4, 5, 6, and 7 are obtained when the ethylene concentration is 24% by volume, 28% by volume, 32% by volume, 36% by volume, 40% by volume, and 44% by volume, respectively.
  • the cut surface is shown.
  • the method for fusing flammable gas and steel material of the present invention can be applied particularly advantageously to the flammable gas used as the combustion gas in the fusing of steel material and the fusing of steel material using the combustion gas.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

La présente invention concerne un gaz combustible qui peut être utilisé comme gaz en remplacement de l'acétylène dans la découpe par fusion d'un matériau à base d'acier comprenant 36 à 44 % en vol. inclus d'éthylène, le reste étant du méthane et les impuretés inévitables. L'invention concerne en outre un procédé de découpe par fusion d'un matériau à base d'acier utilisant un gaz combustible comme gaz de combustion et découpant par fusion le matériau à base d'acier. Le gaz combustible dans le procédé de découpe par fusion comprend 36 à 44 % en vol. inclus d'éthylène, le reste étant du méthane et les impuretés inévitables.
PCT/JP2013/065752 2012-08-06 2013-06-06 Gaz combustible et procédé de découpe par fusion d'un matériau à base d'acier WO2014024558A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012-174010 2012-08-06
JP2012174010A JP6162377B2 (ja) 2012-08-06 2012-08-06 可燃性ガスおよび鋼材の溶断方法

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Publication Number Publication Date
WO2014024558A1 true WO2014024558A1 (fr) 2014-02-13

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PCT/JP2013/065752 WO2014024558A1 (fr) 2012-08-06 2013-06-06 Gaz combustible et procédé de découpe par fusion d'un matériau à base d'acier

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JP (1) JP6162377B2 (fr)
WO (1) WO2014024558A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014169431A (ja) * 2013-02-08 2014-09-18 Koatsu Gas Kogyo Co Ltd 溶断用燃料ガスおよびそれを充填してなる高圧ガス容器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4926283B1 (fr) * 1970-05-15 1974-07-08
JPS506003B1 (fr) * 1970-08-22 1975-03-10
JPS53109504A (en) * 1977-03-07 1978-09-25 Daido Oxygen Inflammable gas for welding* cutting by fusion and heating metals
JPS5415561B2 (fr) * 1976-11-22 1979-06-15

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4926283B1 (fr) * 1970-05-15 1974-07-08
JPS506003B1 (fr) * 1970-08-22 1975-03-10
JPS5415561B2 (fr) * 1976-11-22 1979-06-15
JPS53109504A (en) * 1977-03-07 1978-09-25 Daido Oxygen Inflammable gas for welding* cutting by fusion and heating metals

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JP6162377B2 (ja) 2017-07-12
JP2014031472A (ja) 2014-02-20

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