WO2004096468A1 - Barre composite et son procede de fabrication et extremite de contact de soudure a l'arc et electrode de soudure a resistance comprenant la barre composite - Google Patents

Barre composite et son procede de fabrication et extremite de contact de soudure a l'arc et electrode de soudure a resistance comprenant la barre composite Download PDF

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Publication number
WO2004096468A1
WO2004096468A1 PCT/JP2003/005496 JP0305496W WO2004096468A1 WO 2004096468 A1 WO2004096468 A1 WO 2004096468A1 JP 0305496 W JP0305496 W JP 0305496W WO 2004096468 A1 WO2004096468 A1 WO 2004096468A1
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WO
WIPO (PCT)
Prior art keywords
copper
copper alloy
composite rod
dispersion
rod
Prior art date
Application number
PCT/JP2003/005496
Other languages
English (en)
Japanese (ja)
Inventor
Tsuyoshi Isejima
Original Assignee
Kansai Pipe Industries, Ltd.
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 Kansai Pipe Industries, Ltd. filed Critical Kansai Pipe Industries, Ltd.
Priority to JP2004571302A priority Critical patent/JPWO2004096468A1/ja
Priority to PCT/JP2003/005496 priority patent/WO2004096468A1/fr
Priority to AU2003235977A priority patent/AU2003235977A1/en
Publication of WO2004096468A1 publication Critical patent/WO2004096468A1/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
    • 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
    • B23K35/0205—Non-consumable electrodes; C-electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools

Definitions

  • the present invention relates to a composite rod, a method for producing the same, a contact tip for arc welding comprising the composite rod, and an electrode for resistance welding.
  • the present invention relates to a composite rod having excellent conductivity, heat resistance, abrasion resistance and welding resistance, and particularly suitably used as a conductive material such as a contact tip for arc welding and an electrode for resistance welding.
  • Contact tip materials used in arc welding such as MIG welding and MAG welding are required to have electrical conductivity and heat resistance, and copper alloys such as chromium copper, zirconium copper, and zirconium chromium copper are generally used to meet these requirements. I have been. Also, as for the material of the electrode used for resistance welding such as spot welding, since conductivity and heat resistance are required, chromium copper, diconium copper, zirconium chromium copper, etc., as in the case of the contact tip, are also used. Has been used.
  • alumina dispersion strengthened copper has been used as a material for contact chips and electrodes.
  • Alumina dispersion strengthened copper is obtained by dispersing fine particles of alumina in a copper matrix, and is usually formed by an internal oxidation method.
  • a contact chip or an electrode it is generally manufactured by first forming an alumina dispersion strengthened copper rod and subjecting it to the required processing.
  • the diffusion rate of oxygen in the copper matrix is low. If copper, which is a matrix, is formed into a rod and then subjected to internal oxidation treatment, the entire rod becomes internal acid. It will take a very long time to convert.
  • an aluminum-containing copper powder having a large surface area is internally oxidized to produce an alumina-dispersed copper powder, which is then converted from oxygen-free copper. It is common practice to produce an aluminum-dispersed copper alloy rod by encapsulating it in a container and performing hot extrusion.
  • An object of the present invention is to provide a rod which is suitably used as a material for an arc welding contact tip, a resistance welding electrode, or the like at a lower cost. Disclosure of the invention
  • the contact tip electrode usually needs to be made of an alumina-dispersed copper alloy having excellent wear resistance, welding resistance, etc., only at the inner central portion.
  • the proportion occupied by the alumina-dispersed copper alloy part cannot be reduced so much due to its manufacturing method, and the ratio of the diameter of the alumina-dispersed copper alloy part to the diameter of the entire rod is 0. In fact, it is about 4 or slightly larger.
  • the present inventors have focused on research and development of a composite rod that can minimize the proportion occupied by the dispersion-strengthened copper alloy portion, and have reached the present invention.
  • a core material having a dispersive copper alloy part at least on the inner part excluding the outer skin part is inserted into an outer pipe material made of copper or a copper alloy, and these are drawn.
  • the ratio of the diameter of the dispersion-strengthened copper alloy portion to the diameter of the entire rod is 0.1 to 0.49.
  • the ratio of the diameter of the copper oxide alloy portion is less than 0.1, the intended performance may not be exhibited when it is processed into a contact tip for arc welding and an electrode for resistance welding.
  • the ratio of the dispersion-strengthened copper alloy part occupies the same area even if the performance when processed into a contact tip for arc welding or an electrode for resistance welding does not change. Increases the cost.
  • the ratio is more preferably between 0.15 and 0.4.
  • the proportion occupied by the dispersion-strengthened copper alloy portion is within a range capable of maintaining the performance required when processed into an arc welding contact tip or a resistance welding electrode. Since it has been minimized, the cost can be greatly reduced compared to conventional alumina-dispersed copper alloy rods.
  • the dispersion-strengthened copper alloy portion is, for example, at least one oxide selected from the group consisting of alumina, zirconia, thoria, yttria, beryllia, and polonia dispersed in a copper matrix. . These oxides are harder than the matrix copper and have lower oxide formation energy. It is possible to obtain a dispersion-strengthened copper alloy having similar properties by dispersing boride and carbide in addition to oxides in a copper matrix. .
  • the amount of the oxide in the dispersion strengthened copper alloy part is preferably 0.15 to 1% by mass. If the amount of the oxide is less than 0.15% by mass, the strength is insufficient. If the amount of the oxide is more than 1% by mass, machining such as cutting and forging becomes difficult.
  • the core material is usually formed by encapsulating the dispersion-strengthened copper alloy powder obtained by the internal oxidation method in a container made of copper or a copper alloy and subjecting them to hot extrusion.
  • the dispersion-strengthened copper alloy portion is formed on the inner portion of the core material excluding the outer skin portion made of copper or a copper alloy.
  • the copper or copper alloy constituting the container for example, oxygen-free copper, copper oxide, chromium copper, zirconium copper, zirconium chromium copper, or the like is used, and this is used as the outer shell of the core material.
  • the outer tube material is usually one of pure copper (oxygen-free copper, phosphorous deoxidized copper, etc.), chromium copper, zirconium copper, and zirconium chromium copper. Of ingots.
  • the present invention also includes a method for producing the composite rod.
  • This manufacturing method is based on a method in which a dispersion-strengthened copper alloy powder obtained by an internal oxidation method is sealed in a container made of copper or a copper alloy, and the core material formed by hot-extrusion of the powder is converted into a copper or copper alloy. Injecting into the outer tube material made of the ingot material and drawing them out. According to the above manufacturing method, a composite rod in which the proportion occupied by the dispersion-strengthened copper alloy portion is minimized can be easily obtained.
  • annealing is preferably performed in a vacuum or a weak reducing atmosphere at 400 to 700 ° C. for 0.25 to 24 hours. Further, it is preferable to start annealing when the degree of drawing becomes 20% or more.
  • the material of the container and the outer pipe material may be the same.
  • the bonding strength at the interface between the drawn core material and the outer tube material increases, and the properties of the parts other than the dispersion strengthened copper alloy after annealing become uniform, which is advantageous for processing such as forging. It is.
  • the present invention includes a contact tip for arc welding formed from the composite rod.
  • a contact tip is usually formed by cutting a rod, which is a material, into a desired external shape and opening a hole in the center. Since a welding wire is passed through these pores and energized, there is a possibility that the surroundings of the pores may be changed due to wear and spatter.
  • the contact tip according to the present invention only the periphery of the pores is formed from the dispersion-strengthened copper alloy portion that is unlikely to undergo the above-mentioned deterioration. Therefore, according to the contact tip of the present invention, despite having the same conductivity, heat resistance and wear resistance as the conventional contact tip formed from the alumina-dispersed copper alloy rod, , Can significantly reduce costs.
  • the present invention includes an electrode for resistance welding formed from the composite rod.
  • the electrodes are usually formed by subjecting the material rod to the required forging and Z or cutting.
  • the electrodes used in automobile assembly lines, etc. are tapered at the tip in order to improve current strength and pressure, and this tip is most likely to be worn during welding.
  • the contact tip according to the present invention only the tip portion is formed from the dispersion-strengthened copper alloy portion that is unlikely to cause the above-described wear. Therefore, according to the electrode for resistance welding of the present invention, both weldability and cost can be achieved.
  • FIG. 1 is a cross-sectional view of a core material and an outer pipe material used as a material of a composite rod according to the present invention.
  • FIG. 2 is a cross-sectional view of a composite rod according to the present invention.
  • a Cu 0.3 mass% A1 alloy powder having an average particle size of 50 m was produced by a water atomizing method.
  • a cuprous oxide powder having an average particle size of 5 m was mixed so as to correspond to a stoichiometric amount for oxidizing the aluminum.
  • the obtained mixed powder was heated and maintained at 850 ⁇ for 8 hours in an argon gas atmosphere, and further heated and maintained at 50,000 for 3 hours in a hydrogen gas atmosphere.
  • an alumina dispersion-strengthened copper powder in which alumina was dispersed in a copper matrix was produced.
  • the alumina dispersion-strengthened copper powder was sealed in a cylindrical container with a lid made of oxygen-free copper having an outer diameter of 25 O mm and an inner diameter of 25 mm, and was subjected to underwater extrusion at 800 to a diameter of 3 O mm. This was further drawn to obtain a rod-shaped core material having a diameter of 6.5 mm.
  • the core material (1) has an oxygen-free body (2) on its outer surface, and the remaining inner portion is made of an alumina dispersion strengthened copper alloy (3).
  • the alumina content in the alumina dispersion strengthened copper alloy part (3) was about 0.5 mass%.
  • a zirconium chromium copper alloy was melted and formed, and the resulting ingot was subjected to hot extrusion, rolling, and drawing to produce an outer tube material (4) having an outer diameter of 25 mm and an inner diameter of 7 mm. (See Figure 1 (b)). After inserting the core material (1) into the outer pipe material (4) and drawing them out to a diameter of 12 mm, they are placed in a weak reducing gas atmosphere (inert gas containing 4% H + CO) at 500 ° C. Annealed for 1 hour. Thus, a composite rod (5) as shown in FIG. 2 was obtained.
  • a weak reducing gas atmosphere inert gas containing 4% H + CO
  • the alumina dispersion strengthened copper alloy part (20) has a diameter (B) of 3 mm, and is 25% of the entire outer diameter (A) (12 mm) of the rod (5).
  • Account for the percentage of A zirconium chromium copper part (40) is formed around the alumina dispersed high strength copper alloy part (20) via an oxygen-free copper part (30) with a thickness of 2 mm.
  • Example 2 The same alumina-dispersed strong copper powder produced in the process of Example 1 was sealed in a cylindrical container with a lid made of oxygen-free copper having an outer diameter of 25 Omm and an inner diameter of 235 mm, and was extruded underwater to a diameter of 3 Omm at 800. This was further processed and drawn to obtain an alumina dispersion strengthened copper rod having a diameter of 12 mm.
  • the diameter of the alumina dispersion strengthened copper alloy part is 11.3 mm, which accounts for 94% of the outer diameter (12 mm) of the entire rod.
  • Example 1 When the manufacturing costs of the composite rod (5) of Example 1 and the alumina dispersion-strengthened copper rod of Comparative Example 1 were calculated and compared, the cost of Example 1 was only about half that of Comparative Example 1. Did not.
  • the electrical conductivity of the composite rod (5) of Example 1 was 80% ACS in the alumina dispersion strengthened copper alloy part.
  • the hardness of the composite rod (5) was 165 HV in the alumina dispersion strengthened copper alloy part (20) and 17 OHV in the zirconium chromium copper part (40).
  • the conductivity of the alumina dispersion strengthened copper rod of Comparative Example 1 was 80% ACS in the alumina dispersion strengthened copper alloy part.
  • the hardness of the rod was 165 HV in the alumina dispersion strengthened copper alloy part and 90 HV in the oxygen-free copper part of the outer skin.
  • the composite rod (5) according to the present invention (Example 1) is a Despite having the same excellent electrical conductivity and abrasion resistance as the luminous dispersion strengthened copper rod (Comparative Example 1), it can be manufactured at about one-half the cost.
  • the composite rod (5) produced in Example 1 was subjected to required cutting, and a hole having a diameter of 1.2 mm was drilled at the center thereof to produce a contact tip for MIG welding.
  • the alumina dispersion strengthened copper rod produced in Comparative Example 1 was subjected to the same cutting and drilling as in Example 2 to produce a contact tip for MIG welding.
  • a 12 mm diameter rod made of ingot material of zirconium chromium copper was subjected to the same cutting and drilling processes as in Example 2 to produce a contact tip for MIG welding.
  • Contacts of Example 2 and Comparative Examples 2 and 3 We measured the welding life (time allowed for continuous welding) when MIG welding mild steel sheets using the tip. The evaluation was performed by rotating a drum made of a mild steel plate (thickness: 5 mm) and placing a bead while moving the torch little by little in the length direction of the drum, until the excess was not continuously formed. Time.
  • the welding life when the contact tip of Example 2 was used was almost the same as that when the contact tip of Comparative Example 2 was used, and was about 4 times the welding life when the contact tip of Comparative Example 3 was used. It was twice.
  • a composite rod (5) having a diameter of 16 mm (diameter of the alumina dispersion strengthened alloy part: 7 mm) produced in the same manner as in Example 1 was forged and cut into a required shape to produce an electrode for resistance spot welding.
  • the electrode shape was a CR (dom) shape, and the diameter of the flat part at the tip was 5 mm.
  • a rod having a diameter of 16 mm made of ingot material of zirconium chromium copper was subjected to the same cutting processing as in Example 3 to produce an electrode for resistance spot welding.
  • the electrode life when the electrode of Example 3 was used was almost the same as that when the electrode of Comparative Example 4 was used, and was about 2.5 times the electrode life when the electrode of Comparative Example 5 was used. Was.
  • a composite rod was produced in the same manner as in Example 1, except that the material of the container was the same zirconium chromium copper alloy as the outer tube material. Then, the composite rod was subjected to forging and cutting in the same manner as in Example 3 to produce an electrode for resistance spot welding.
  • the present invention provides a composite rod having a minimum required dispersion-strengthened copper alloy part.
  • the present invention provides a conventional rod as a conductive material such as a contact tip for arc welding and an electrode for resistance welding.
  • alumina-dispersed copper rod it is useful in that it can be supplied at low cost.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Powder Metallurgy (AREA)
  • Arc Welding In General (AREA)
  • Metal Extraction Processes (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)

Abstract

L'invention porte sur une barre composite utilisée de manière appropriée comme extrémité de contact de soudure à l'arc et sur un matériau d'électrode de soudure par résistance. Le procédé de fabrication consiste à former un matériau central possédant une section en alliage de cuivre renforcée par dispersion au niveau d'au moins de sa partie latérale interne, excluant une partie superficielle externe par insertion dans un matériau de tube externe comprenant du cuivre ou un alliage de cuivre et à les étirer ensemble, le rapport entre le diamètre de la barre totale et celui de la section en alliage de cuivre renforcé par dispersion étant compris ente 0,1 et 0,49. Dans cette barre composite, il est possible de minimiser une proportion déterminée pour la section en alliage de cuivre renforcé par dispersion tout en gardant une performance requise lorsque la barre est transformée en extrémité de contact de soudure à l'arc ou en électrode de soudure par résistance, ce qui permet de réduire considérablement les coûts comparé à une tige de cuivre traditionnelle à dispersion d'aluminium.
PCT/JP2003/005496 2003-04-30 2003-04-30 Barre composite et son procede de fabrication et extremite de contact de soudure a l'arc et electrode de soudure a resistance comprenant la barre composite WO2004096468A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2004571302A JPWO2004096468A1 (ja) 2003-04-30 2003-04-30 複合棒およびその製造方法ならびに該複合棒よりなるアーク溶接用コンタクトチップおよび抵抗溶接用電極
PCT/JP2003/005496 WO2004096468A1 (fr) 2003-04-30 2003-04-30 Barre composite et son procede de fabrication et extremite de contact de soudure a l'arc et electrode de soudure a resistance comprenant la barre composite
AU2003235977A AU2003235977A1 (en) 2003-04-30 2003-04-30 Composite rod and production method therefor and arc welding contact tip and resistance welding electrode comprising the composite rod

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2003/005496 WO2004096468A1 (fr) 2003-04-30 2003-04-30 Barre composite et son procede de fabrication et extremite de contact de soudure a l'arc et electrode de soudure a resistance comprenant la barre composite

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WO2004096468A1 true WO2004096468A1 (fr) 2004-11-11

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AU (1) AU2003235977A1 (fr)
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008161929A (ja) * 2007-01-05 2008-07-17 Tookin:Kk 合わせ材及びその製造方法
CN110029246A (zh) * 2019-05-13 2019-07-19 大连理工大学 一种三氧化二钇弥散强化铜合金的制备方法
CN111136400A (zh) * 2020-02-26 2020-05-12 郑州大学 一种不锈钢焊条
WO2024068182A1 (fr) * 2022-09-26 2024-04-04 Kjellberg-Stiftung Composant tel qu'une pièce d'usure pour une torche à arc, en particulier un brûleur à plasma ou une torche de découpe au plasma, torche à arc le comprenant, et procédé de découpe au plasma

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019107265A1 (fr) * 2017-11-28 2019-06-06 日本碍子株式会社 Élément d'extrémité conducteur et procédé de fabrication s'y rapportant

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4478787A (en) * 1982-06-18 1984-10-23 Scm Corporation Method of making dispersion strengthened metal bodies and product
JPS60135503A (ja) * 1983-12-17 1985-07-18 エスシ−エム・コ−ポレ−シヨン 分散強化金属体及び製品の製造法
JPH01263203A (ja) * 1988-04-13 1989-10-19 Sumitomo Light Metal Ind Ltd 抵抗溶接用電極材料及びその製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4478787A (en) * 1982-06-18 1984-10-23 Scm Corporation Method of making dispersion strengthened metal bodies and product
JPS60135503A (ja) * 1983-12-17 1985-07-18 エスシ−エム・コ−ポレ−シヨン 分散強化金属体及び製品の製造法
JPH01263203A (ja) * 1988-04-13 1989-10-19 Sumitomo Light Metal Ind Ltd 抵抗溶接用電極材料及びその製造方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008161929A (ja) * 2007-01-05 2008-07-17 Tookin:Kk 合わせ材及びその製造方法
CN110029246A (zh) * 2019-05-13 2019-07-19 大连理工大学 一种三氧化二钇弥散强化铜合金的制备方法
CN111136400A (zh) * 2020-02-26 2020-05-12 郑州大学 一种不锈钢焊条
WO2024068182A1 (fr) * 2022-09-26 2024-04-04 Kjellberg-Stiftung Composant tel qu'une pièce d'usure pour une torche à arc, en particulier un brûleur à plasma ou une torche de découpe au plasma, torche à arc le comprenant, et procédé de découpe au plasma

Also Published As

Publication number Publication date
AU2003235977A1 (en) 2004-11-23
JPWO2004096468A1 (ja) 2006-07-13

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