WO2013069573A1 - 曲面の肉盛溶接方法及びそれを用いたランスの製造方法 - Google Patents

曲面の肉盛溶接方法及びそれを用いたランスの製造方法 Download PDF

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Publication number
WO2013069573A1
WO2013069573A1 PCT/JP2012/078496 JP2012078496W WO2013069573A1 WO 2013069573 A1 WO2013069573 A1 WO 2013069573A1 JP 2012078496 W JP2012078496 W JP 2012078496W WO 2013069573 A1 WO2013069573 A1 WO 2013069573A1
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WIPO (PCT)
Prior art keywords
curved surface
overlay welding
lance
pipe
steel
Prior art date
Application number
PCT/JP2012/078496
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
雅英 山下
純 平田
真悟 塚本
浩文 榎戸
池上　博文
Original Assignee
株式会社フジコー
品川リフラクトリーズ株式会社
Ｊｆｅスチール株式会社
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 株式会社フジコー, 品川リフラクトリーズ株式会社, Ｊｆｅスチール株式会社 filed Critical 株式会社フジコー
Priority to CN201280054560.4A priority Critical patent/CN103917321B/zh
Priority to JP2013542960A priority patent/JP5951631B2/ja
Priority to IN4096CHN2014 priority patent/IN2014CN04096A/en
Publication of WO2013069573A1 publication Critical patent/WO2013069573A1/ja

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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
    • B23K9/00—Arc welding or cutting
    • B23K9/04—Welding for other purposes than joining, e.g. built-up welding
    • B23K9/044—Built-up welding on three-dimensional surfaces
    • B23K9/046—Built-up welding on three-dimensional surfaces on surfaces of revolution
    • B23K9/048—Built-up welding on three-dimensional surfaces on surfaces of revolution on cylindrical surfaces
    • 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
    • B23K35/001—Interlayers, transition pieces for metallurgical bonding of workpieces
    • B23K35/004—Interlayers, transition pieces for metallurgical bonding of workpieces at least one of the workpieces being of a metal of the iron group
    • 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
    • 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
    • B23K35/32—Selection of soldering or welding materials proper with the principal constituent melting at more than 1550 degrees C
    • B23K35/327—Selection of soldering or welding materials proper with the principal constituent melting at more than 1550 degrees C comprising refractory compounds, e.g. carbides
    • 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
    • B23K9/00—Arc welding or cutting
    • B23K9/235—Preliminary treatment

Definitions

  • the present invention is, for example, a method of overlay welding performed to improve wear resistance on a part of a steel structure having a curved surface such as a lance used in a steel mill (specifically, an “injection lance”) and the like.
  • the present invention relates to a lance manufacturing method using the same.
  • Patent Document 1 As shown in Patent Document 1, for example, when hot metal discharged from a blast furnace is subjected to hot metal pretreatment with a topped car or the like, a lance with a bent front side is used, and a bent pipe (vent pipe) is usually used at the bent portion. ) And is welded to the front and back straight pipes.
  • a metallic protrusion having a height of 1/20 to 1/2 of the inner diameter of the bent pipe is provided on the inner surface of the bent portion, and the treatment agent is positively provided in the gap portion of the protruding piece. This increases the wear resistance of this part.
  • Patent Document 2 proposes a method of overlay welding a clad metal made of high carbon steel on the inside of a steel pipe, thereby ensuring wear resistance on the inside of the steel pipe.
  • the applicant has proposed that the base material is welded with a nickel-base alloy, a stainless alloy, or the like to increase the wear resistance of the base material.
  • JP 2010-222592 A Japanese Patent Laid-Open No. 10-8191 JP 2008-93732 A
  • Patent Document 1 has a problem in that the treatment agent accumulated in the gap between the projecting pieces grows, and the effective diameter of the lance becomes smaller with time, and the lance is sometimes blocked. Therefore, the present applicant has intensively studied to prevent clogging of the processing agent by overlay welding a wear-resistant metal inside the lance.
  • the pipe (core metal) used inside the lance is usually a small diameter pipe having a diameter of 100 mm or less.
  • the pipe is rotated with the welding torch facing downward, a certain amount of buildup is achieved.
  • Welding is possible, but when overlay welding is performed on a bent part in the middle, there is no other way than to perform the welding torch corresponding to the unevenness of the welding location, and in this case, the welding location is not necessarily a plane or approximate plane. For this reason, there existed a problem that the molten metal used as a build-up part flowed on the inclined surface, and the stable welding could not be performed.
  • This invention is made
  • An object of the present invention is to provide a method for overlay welding of a curved surface and a method for producing a lance using the same.
  • the curved surface overlay welding method according to the first invention includes a first step of temporarily fixing an iron or stainless steel mesh material to a welded region of a steel structure that is partially or entirely curved. And a second step of performing overlay welding from above the mesh material.
  • the steel structure may be, for example, a steel pipe (including both a carbon steel pipe and a stainless steel pipe), and the welded area may be an inner surface thereof.
  • the mesh material is preferably a steel expanded metal. However, if it interferes with the flow of the molten metal, it may be another wire mesh material. Can also be used.
  • the curved surface overlay welding method according to the second invention is the curved surface overlay welding method according to the first invention, wherein the steel structure is carbon steel, and the welding material for the overlay welding is heat resistant and resistant. It is said that it is a high chromium cast iron-based wire having wear characteristics.
  • the molten material may be another metal as long as it is a weldable metal having wear resistance at a high temperature.
  • a curved surface overlay welding method is the curved surface overlay welding method according to the first and second aspects of the invention, wherein the steel structure is a steel pipe, wherein the steel pipe is a molten metal used at a steel mill.
  • the welded region is a radially outer region of the bent portion of the lance.
  • the area to be welded is preferably in a range of 180 degrees or more (for example, 180 to 280 degrees) around the radially outer ridge line of the bent portion of the lance.
  • the bent portion of the lance is composed of a bent pipe and a part of the first and second straight pipes welded to the end of the bent pipe,
  • the welded area is an area in the vicinity of the welded portion of the bent pipe and the first and second straight pipes, excluding the welded part between the first and second straight pipes and the bent pipe. Is preferred.
  • the lance manufacturing method according to the fourth aspect of the invention applies the above-described curved surface overlay welding method according to the first to third aspects of the invention.
  • curved surface overlay welding method according to the first to third aspects of the invention.
  • pipe of a lance it is possible to manufacture a lance using a well-known method.
  • the surface of the overlay welding can be further covered with an irregular refractory material.
  • the amorphous refractory material can be applied by spraying or spraying, and in some cases by application.
  • the thickness of the amorphous refractory material is preferably about 1 to 4 mm.
  • the curved surface overlay welding method according to the present invention performs overlay welding after temporarily fixing an iron or stainless steel mesh material to a welded region of a steel structure in which a part or all of the curved surface is curved. Is blocked by the mesh material and remains at the overlay welding position. Therefore, overlay welding of wear-resistant metal can be performed without hindrance.
  • the heat-resistant and wear-resistant metal is overlay welded to that portion.
  • the portion is hardened, the progress of wear due to the passing powder or particulate matter is delayed, and the lance has a long life.
  • a high chromium cast iron-based wire which is an example of a metal having heat resistance and wear resistance, as a molten material for overlay welding, welding becomes easier and a hard overlay surface is formed.
  • overlay welding is performed on the bent portion of the lance inner surface by an easy construction method, so that the welding operation is stable, and the The reliability of the welded area is also improved. Moreover, if the surface of the overlay metal is covered with an irregular refractory material, the life of the lance is further extended.
  • (A) is explanatory drawing of the lance (inner pipe
  • (B) is PP 'sectional drawing of the same figure (A).
  • (A) to (C) are plan views of expanded metal used in the overlay welding method of the same curved surface. It is a side view of a lance. It is a schematic explanatory drawing of the test apparatus of an abrasion test. It is a graph which shows the result of an abrasion test. It is explanatory drawing of the lance which applies the overlay welding method of the curved surface which concerns on the 2nd Example of this invention.
  • (A) is a cross-sectional view taken along the lines QQ 'and RR' in FIG. 6, and (B) is a cross-sectional view taken along the line SS 'in FIG. 6 (however, the outer refractory is omitted).
  • (A) to (C) are plan views of the expanded metal used in the curved surface overlay welding method according to the second embodiment of the present invention.
  • FIG. 3 shows a lance 10 used for blowing fuel gas and additives (for example, iron oxide powder and lime powder) into molten steel (molten metal) with a topped car used at a steel mill. It has a tube region 11 and a bent region 12 at the tip, and each straight region 11 and the bent region 12 are covered with a refractory 13 on the outside, and an inner tube 14 (a part or all of which is a curved steel structure) An example of a steel pipe which is an object) and a double pipe structure of the outer pipe 15.
  • fuel gas and additives for example, iron oxide powder and lime powder
  • a small gap is formed between the inner pipe 14 and the outer pipe 15, and propane gas flows through this gap, and an additive is added into the inner pipe 14, for example, air, oxygen gas, nitrogen gas, argon gas or Using these mixed gases, the structure is such that the air current is conveyed.
  • an additive for example, air, oxygen gas, nitrogen gas, argon gas or Using these mixed gases, the structure is such that the air current is conveyed.
  • FIGS. 1A and 1B in the radially outer region of the inner side surface 18 of the bent portion 16 of the inner tube 14 (which becomes the welded region), the built-up portions 19 to 21 made of high chromium cast iron are provided. Is formed.
  • the built-up portions 19 to 21 will be described in detail.
  • a carbon steel pipe (STPG) having an outer diameter of 60.5 mm is used for the inner pipe 14, and the first straight pipe 23 and the short second straight pipe 24 are elbows (115 degrees). It is connected by welding via a bent pipe (bent) 25. Reference numerals 26 and 27 denote these welds.
  • the built-up portions 19 to 21 are formed in regions near the welded portions 26 and 27 excluding the welded portions 26 and 27.
  • the outer tube 15 is provided on the outside of the inner tube 14 with a small gap (for example, 5 to 10 mm) through a spacer or the like.
  • the bent portion 16 includes an elbow 25 and a part of the first and second straight pipes 23 and 24 welded to the end portions of the elbow 25.
  • the first and second straight pipes 23 and 24 are in a state where the first and second straight pipes 23 and 24 and the elbow 24 are not welded.
  • Steel expanded metals 29 and 30 which are examples of a net material having a width of 8 to 15 mm are arranged in a state bent to a circular arc of 180 degrees at a position of 5 to 15 mm from the end, and temporarily fixed by welding.
  • the expanded metals 29 and 30 those having a mesh size of 12 to 25 mm and a plate thickness of 1.2 to 1.6 mm (for example, JISG3351, XS31 or XS41) are used.
  • the inner side surface of the elbow 25 is provided with a clearance of 5 to 15 mm from both ends in a portion having a large bending radius (that is, a radially outer region) on the inner side surface of the elbow 25.
  • the expanded metal 31 formed according to the half is placed and temporarily fixed by welding.
  • the expanded metal 31 is the same as that used for the first and second straight pipes 23 and 24.
  • overlay welding of high chromium cast iron metal which is an example of a metal having heat resistance and wear resistance, is performed on the expanded metals 29 to 31.
  • high chromium cast iron metal which is an example of a metal having heat resistance and wear resistance
  • the angle ⁇ indicates the angle of the welded area, and the areas of 90 degrees or more (that is, 180 degrees or more in total) in the circumferential direction around the ridge line f on the radially outer side are overlay welded is doing.
  • the angle ⁇ indicates the angle of the welded area, and the areas of 90 degrees or more (that is, 180 degrees or more in total) in the circumferential direction around the ridge line f on the radially outer side are overlay welded is doing.
  • the angle ⁇ indicates the angle of the welded area, and the areas of 90 degrees or more (that is, 180 degrees or more in total) in the circumferential direction around the ridge line f on the radially outer side are overlay welded is doing.
  • the angle ⁇ indicates the angle of the welded area, and the areas of 90 degrees or more (that is, 180 degrees or more in total) in the circumferential direction around the ridge line f on the radially outer side are overlay welded is doing.
  • high chromium cast iron metal melt high chromium cast iron flux cored wire is used, and overlay welding is performed by a carbon dioxide arc welding method.
  • overlay welding is performed by a carbon dioxide arc welding method.
  • the inner surface of the inner tube 14 is melted and the expanded metals 29 to 31 are also partially melted.
  • each wire of the expanded metals 29 to 31 forms a weir and restricts the flow of the molten metal.
  • a part of the expanded metals 29 to 31 is melted to dilute the high chromium cast iron metal. Further, some of the expanded metals 29 to 31 may remain in an unmelted state, but this does not affect the wear resistance.
  • the dilution rate increases as the number of plates increases. However, it takes time and effort, and it is necessary to take these into consideration.
  • the thickness of the overlay metal is, for example, about 3 to 5 mm.
  • the first and second straight pipes 23 and 24 are aligned with each other, temporarily attached to both ends of the elbow 25, and then welded.
  • the melt used for welding usually uses a wire for welding a steel plate.
  • welds 26 and 27 are formed.
  • a groove having a width of about 20 mm is formed in the welded portions 26 and 27 on the inner peripheral surface of the inner pipe 14, and an additive passing through the lance 10 is deposited in the groove, and as a result. This clogged additive protects the welded portions 26 and 27 arranged on the radially outer side.
  • the characteristics of the built-up portions 19 to 21 will be described.
  • a large amount of chromium carbide and carbides such as Nb, Mo, W, and V are generated in the weld metal and show extremely high hardness.
  • the minimum hardness of the Vickers hardness HV with a load of 10 kg is 882, the maximum hardness is 960, and the average hardness is 921.
  • the weld metal is 5 to 6.5 wt% for C, 1.9 to 2.3 wt% for Si, 0.3 to 0.45 wt% for Mn, 22 to 26 wt% for Cr, and 0 for Mo. It can be seen that it may be in the range of more than 0 and 5 wt%, V is 0 or more than 0 and 1.2 wt%, Nb is 3 to 7 wt%, and W is 0 or more than 0 and 4.5 wt%.
  • FIGS. 6, 7 ⁇ / b> A, and 7 ⁇ / b> B The same components as those in the first embodiment shown in FIGS. 1 to 5 are designated by the same reference numerals and detailed description thereof is omitted.
  • the lance 38 has a straight tube region 11 and a bent region 12 at the tip, and each straight region 11 and the bent region 12 are covered with a refractory 13 on the outside, and the inner tube 14 is formed on the inside.
  • the inner side surface 18 of the bent portion 16 of the inner tube 14 has a circle centered on the ridgeline of the inner cylindrical portion, that is, the radially outer ridgeline 40 of the bent portion 16.
  • the built-up portions 41 to 43 made of high chromium cast iron extending 90 to 135 degrees (a total weld area of 180 to 270 degrees) are formed.
  • the thickness of the built-up portions 41 to 43 is, for example, 3 to 4 mm, but the present invention is not limited to this number.
  • a steel expanded metal 45 (see FIG. 8A), which is an example of a net material having a width of 8 to 15 mm, is placed at an inner position of 5 to 15 mm from the pipe end of the straight pipe (inner pipe) 23, for example, 210 to 220 degrees. It arrange
  • a gap of 5 to 15 mm from both ends is provided in a portion having a large bending radius (that is, a radially outer region) on the inner side surface 18 of the elbow (inner tube) 25,
  • An expanded metal 46 (see FIG. 8 (B)) molded in accordance with the position of 210 to 220 degrees is placed and temporarily fixed by welding. In this state, build-up welding of a chrome cast iron metal is performed from above the expanded metal 46.
  • a certain steel expanded metal 47 (see FIG. 8C) is arranged in a state of being bent in an arc shape at an angle of 260 to 270 degrees, for example, and temporarily fixed by welding. In this state, build-up welding of a chromium cast iron metal is performed from above the expanded metal 47.
  • the expanded metals 45 to 47 are the same as those described in the first embodiment.
  • a lance is manufactured using this curved surface overlay welding method, except for performing overlay welding by the above-described method on the bent portion, Japanese Patent Publication No. 2011-17529, Japanese Patent Publication No. 2010-222592. Since it is a well-known method also known in the art, detailed description is omitted. Further, a part of the built-up portions 19 to 21 and 41 to 43 (for example, the built-up portions 20 and 42) or the entire surface can be covered with an amorphous fireproof material, thereby extending the life of the lance. be able to.
  • the amorphous refractory material is preferably made of known alumina and silica powder and a necessary binder.
  • the present invention is not limited to the above-described embodiments.
  • the weld metal forming the build-up portion has heat resistance and wear resistance
  • other melt materials can be used.
  • this invention is not limited to the numerical value as described in an Example.
  • a thermal spray coating having heat resistance or wear resistance can be formed on the cladding surface or on the outside or inside of the pipe of the overlaying portion.
  • steel expanded metal is used as the mesh material.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
PCT/JP2012/078496 2011-11-08 2012-11-02 曲面の肉盛溶接方法及びそれを用いたランスの製造方法 WO2013069573A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201280054560.4A CN103917321B (zh) 2011-11-08 2012-11-02 曲面的堆焊方法及采用该堆焊方法的喷枪的制造方法
JP2013542960A JP5951631B2 (ja) 2011-11-08 2012-11-02 曲面の肉盛溶接方法及びそれを用いたランスの製造方法
IN4096CHN2014 IN2014CN04096A (enrdf_load_stackoverflow) 2011-11-08 2012-11-02

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-244730 2011-11-08
JP2011244730 2011-11-08

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WO2013069573A1 true WO2013069573A1 (ja) 2013-05-16

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JP (1) JP5951631B2 (enrdf_load_stackoverflow)
CN (1) CN103917321B (enrdf_load_stackoverflow)
IN (1) IN2014CN04096A (enrdf_load_stackoverflow)
WO (1) WO2013069573A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114309127A (zh) * 2020-09-29 2022-04-12 郑州万达重工股份有限公司 内壁堆焊小弯曲半径弯管以及其成型方法

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CN111112964A (zh) * 2020-01-08 2020-05-08 长治市三耐铸业有限公司 一种弧形选粉机叶片堆焊方法
CN111151845B (zh) * 2020-01-10 2024-12-03 中国联合工程有限公司 一种核主泵试验台主回路及其内壁堆焊和环缝对接焊方法
CN111347126A (zh) * 2020-03-04 2020-06-30 济南重工股份有限公司 一种磨机溜管及其加工工艺

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JPS56144868A (en) * 1980-04-14 1981-11-11 Japan Steel Works Ltd:The Production of internally overlaid elbow
JPS60191683A (ja) * 1984-03-13 1985-09-30 Mitsubishi Electric Corp 母材の合金化方法
JPH01177080U (enrdf_load_stackoverflow) * 1988-06-01 1989-12-18
JPH02137671A (ja) * 1988-11-16 1990-05-25 Kyowa Tekkosho:Kk 曲面体の自動溶接ロボット
JPH0381351U (enrdf_load_stackoverflow) * 1989-12-13 1991-08-20
JPH0825078A (ja) * 1994-07-18 1996-01-30 Komatsu Ltd 肉盛溶接用材料
JP2001314965A (ja) * 2000-04-28 2001-11-13 Maeda Corp 溶接用裏当て
JP2011017529A (ja) * 2010-08-25 2011-01-27 Tokyo Yogyo Co Ltd ランスパイプ

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114309127A (zh) * 2020-09-29 2022-04-12 郑州万达重工股份有限公司 内壁堆焊小弯曲半径弯管以及其成型方法
CN114309127B (zh) * 2020-09-29 2023-09-26 郑州万达重工股份有限公司 内壁堆焊小弯曲半径弯管以及其成型方法

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CN103917321A (zh) 2014-07-09
CN103917321B (zh) 2017-02-15
JPWO2013069573A1 (ja) 2015-04-02
JP5951631B2 (ja) 2016-07-13
IN2014CN04096A (enrdf_load_stackoverflow) 2015-07-10

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