WO2011004888A1 - Procédé pour coulée continue de bronze ou d’alliage de bronze et cylindre de coulée associé - Google Patents

Procédé pour coulée continue de bronze ou d’alliage de bronze et cylindre de coulée associé Download PDF

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Publication number
WO2011004888A1
WO2011004888A1 PCT/JP2010/061682 JP2010061682W WO2011004888A1 WO 2011004888 A1 WO2011004888 A1 WO 2011004888A1 JP 2010061682 W JP2010061682 W JP 2010061682W WO 2011004888 A1 WO2011004888 A1 WO 2011004888A1
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WO
WIPO (PCT)
Prior art keywords
casting
conductivity
iacs
wheel
ring
Prior art date
Application number
PCT/JP2010/061682
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English (en)
Japanese (ja)
Inventor
司 高澤
浩一 吉田
俊郎 阿部
修司 富松
Original Assignee
古河電気工業株式会社
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 古河電気工業株式会社 filed Critical 古河電気工業株式会社
Publication of WO2011004888A1 publication Critical patent/WO2011004888A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0602—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a casting wheel and belt, e.g. Properzi-process
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/01—Alloys based on copper with aluminium as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/02—Alloys based on copper with tin as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/06—Alloys based on copper with nickel or cobalt as the next major constituent

Definitions

  • the present invention relates to the manufacture of a copper alloy wire used as a copper wire or an automobile wire harness, a robot cable, and other signal wires, and in particular, a method of continuously casting copper or a copper alloy by a belt and wheel method and the same It relates to the casting ring used.
  • an alloy used as a mold is required to have high temperature strength and high thermal conductivity.
  • the material of the cast ring currently used in the belt and wheel method is mainly a Cu—Cr—Zr alloy or a Cu—Ag alloy of a high conductivity (80 to 95% IACS) copper alloy with good heat conduction. Since the heat conduction is good, the ingot cooling capacity is excellent, and high production capacity can be exhibited (see Patent Document 1).
  • casting was performed using iron casting rings.
  • the iron cast ring has a conductivity of 17% IACS, and the heat transfer coefficient is small compared to the copper cast ring, so the cooling capacity is weak and it is difficult to increase the casting speed. Moreover, cracking occurred on the ring surface due to the brittleness of iron, and long-term casting work could not be performed.
  • a unique example is the use of a copper alloy mold material with a low conductivity such as Cu-Cr-Zr-Al, but this mold is not intended for changing cooling conditions but is used for electromagnetic stirring. (For example, refer to Patent Document 2).
  • a copper alloy cast ring using a Cu—Ag alloy (EC: 92% IACS) or a Cu—Cr—Zr alloy (EC: 80% IACS) is strongly cooled because the heat conduction is good immediately after the molten metal contacts the mold.
  • cooling of the initial solidified skin is hindered by an air gap caused by solidification shrinkage. Therefore, the cooling after the start of solidification becomes uneven, the thickness of the solidified shell varies, and cracks occur at fragile locations.
  • This fine crack appears as a surface defect when it becomes a rough drawn wire through a rolling process, and causes a serious problem such as disconnection in the wire drawing process.
  • the yield is also lowered by peeling after rolling to remove the surface defect portion.
  • an object of the present invention is to provide a continuous casting method of copper or copper alloy having a high cooling capacity, excellent productivity, and excellent ingot surface quality, and a casting ring used in the method.
  • the present invention solves the problem by the following solution means.
  • the belt & wheel type continuous casting apparatus comprises a pouring nozzle for injecting molten metal in a tundish, and a belt & wheel casting machine constituted by a belt and a wheel rotated by a turn roll, The continuous casting apparatus according to (5), wherein the wheel includes a wheel main body and a casting ring having the specific conductivity.
  • a continuous casting method of copper or copper alloy having high cooling capacity, excellent productivity, and excellent ingot surface quality, and a casting ring used in the method are provided. be able to.
  • FIG. 1 It is a schematic explanatory drawing which shows the process of manufacturing a wire in one embodiment of the continuous casting method by the belt & wheel method of this invention. It is sectional drawing which shows typically preferable embodiment of the belt & wheel casting machine used with the continuous casting method of this invention. It is an expanded sectional view of the III-III line cross section of the casting machine shown in FIG. It is a graph which shows the relationship between the electrical conductivity of the alloy to cast, and the electrical conductivity of a casting ring.
  • FIG. 1 is an explanatory view showing an example of all steps in which an ingot obtained by the continuous casting method of the present invention is further used as a wire.
  • the method for producing a copper (or copper alloy) wire is obtained by dissolving molten copper in a reducing atmosphere using a shaft furnace 1 to obtain molten copper. 2 is continuously led into the tundish 3.
  • the molten metal 5 in the tundish 3 is poured from the pouring nozzle 4 into a belt & wheel casting machine 8 constituted by a belt 6 and a wheel 7 that are rotated by a turn roll, and cooled and solidified to form an ingot 9.
  • the ingot 9 is continuously drawn out from the mold.
  • the wheel 7 comprises a cast ring and a wheel body.
  • the continuous ingot 10 (two-way roll method or three-way roll method) is rolled to a predetermined wire diameter, and roughing is performed.
  • the wire 11 is used.
  • the rough drawn wire 11 is wound as it is, or further rolled by a wire drawing machine 12 shown in FIG. In FIG. 1, the installation of the wire drawing mill 12 is arbitrary.
  • FIG. 2 shows a longitudinal sectional view of a preferred embodiment of the belt and wheel casting machine used in the belt and wheel method according to the present invention.
  • FIG. 3 is an enlarged cross-sectional view taken along line III-III in FIG.
  • the belt-and-wheel casting machine of the moving mold type has a wheel body 21, a casting belt 22 having a cooling action that is movable by a drive roll 24, and a casting ring 23 provided on the outer periphery of the wheel body 21.
  • the belt 22 is made of carbon steel or stainless steel. Carbon steel or stainless steel is applied to the wheel body 21. A material having a specific conductivity described later is applied to the casting ring 23.
  • the molten metal 26 is poured from the pouring nozzle 25 into the casting ring 23 on the outer periphery of the wheel 21.
  • the poured molten metal 26 is cooled in a rotating casting ring and gradually solidifies to form an ingot 27.
  • FIG. 2 schematically shows that the molten metal solidifies to form an ingot.
  • the casting speed is 6 to 15 m / min (100 to 250 mm / sec) which is put into practical use in normal operation, and the ingot cross-sectional area is 1930 mm 2 to 6450 mm 2 .
  • the inventors consider lowering the conductivity of the casting ring, and the casting ring with low conductivity, that is, poor heat conduction, has a low solidification rate, so that it is possible to perform initial cooling more stably.
  • the relationship between the conductivity of the copper or copper alloy to be treated and the conductivity of the cast ring was investigated.
  • the electrical conductivity (% IACS) of the cast ring is preferably 20% IACS or more and 50% IACS or less. That is, in a preferred embodiment of the present invention, the use of a specific low-conductivity copper alloy casting ring can extremely effectively suppress the formation of an air gap immediately after pouring. Therefore, the heat transfer hindrance due to the air gap in the initial stage of solidification is alleviated and stable cooling can be performed, and as a result, a uniform and stable solidified shell having no fragile portions can be formed. Moreover, the nucleation frequency is increased by increasing the supercooling, and the ingot structure near the ingot surface can be refined.
  • the surface quality of the ingot can be improved, and cracking of the ingot surface can be suppressed. Furthermore, the surface defect of the rough drawn wire can be suppressed by improving the ingot quality, and the yield can be improved as well as the quality of the rough drawn wire is improved.
  • the conductivity means a value measured by the measurement method employed in the examples unless otherwise specified.
  • the conductivity between the cast alloy and the cast ring is preferably set in the range of the following formula (II). 20 ⁇ b ⁇ 0.225 ⁇ a + 27.5 (II) a: Cast alloy conductivity (% IACS) b: Casting ring conductivity (% IACS)
  • the technical significance of the lower limit is as described above.
  • the mathematical formula on the right side constituting the upper limit is derived experimentally, and below this value, it is possible to produce a good cast alloy without peeling and without disconnection.
  • the alloy materials constituting the cast ring include Cu—Cr—Zr—Al alloy, Cu—Cr alloy, Cu—Be alloy, phosphor bronze, Corson alloy, Cu—Zn alloy and the like. preferable. Preferred examples of typical component compositions for each alloy are described below.
  • Example 1 As shown in Tables 1 to 3, cast rings having an ingot cross-sectional area of 3220 mm 2 each having a conductivity of 13 to 80% IACS were used. The component composition of the alloy constituting the cast ring is described together with the following examples and comparative examples. Tough pitch copper containing 0.7% Sn (see Table 1), Cu-1% Cr alloy (see Table 2), and Cu-2.5% Ni-0.6% Si Corson alloy at a casting speed of 20 ton / hour. The alloy rough drawn wire (see Table 3) was manufactured by the SCR method and drawn to ⁇ 0.1 mm. Tables 1 to 3 show the detection results of the eddy current flaw detector at the time of rough drawing wire manufacture and the results of product quality judgment based on the presence or absence of disconnection when the wire was drawn with rough drawing wire.
  • the conductivity of the casting ring was measured on the polished surface of the casting ring using an AutoSigma 3000 manufactured by GE Inspection Technologies. The conductivity of the cast ring was measured at room temperature (23 ° C.).
  • the amount of peel and disconnection judgment is “ ⁇ ” when the ⁇ 8 mm rough drawing wire 5000 kg is peeled off at 0 to 0.3 mm thickness on one side and drawn to ⁇ 0.1 mm as shown. Those that were not disconnected were evaluated as “ ⁇ ”.
  • “ ⁇ ” indicates that the skin peel on one side was 0 mm or 0.1 mm
  • “0” indicates that the skin peel on one side was 0 mm and 0.1 mm.
  • a case where the wire was broken and the wire was not broken when the peel on one side was 0.2 mm was evaluated as “ ⁇ ”, and a wire which was broken when the peel on one side was 0.2 mm was evaluated as “x”.
  • Example 2 For various alloys having the conductivity shown in Table 4, casting and wire drawing were performed under the same conditions as in Example 1 using a cast ring having the indicated conductivity, and evaluation was performed in the same manner as in Example 1. Went. Of these results, those with particularly good results and those with poor results are shown in Table 4 and FIG.
  • the “more desirable conductivity b” shown in Table 4 is a value obtained by applying the alloy conductivity a to (0.225 ⁇ a + 27.5) of the following formula (II), whereas “casting ring conductivity” "Rate” is the conductivity of the cast ring actually used.
  • Example 3 It is an Example when changing a casting speed.
  • Various casting rings with a Cu-2.5% Ni-0.6% Si Corson alloy with an ingot cross-sectional area of 3220 mm 2 and electrical conductivity shown in Table 5 were used, and the casting speed was changed. Casting was carried out in the same manner as in Example 1.
  • the formation of the air gap can be suppressed, so that it can be cooled strongly rather than the casting ring with high conductivity in the initial stage of solidification, and moreover than the iron casting ring. Due to the high conductivity, the overall cooling capacity could be higher than that of the high conductivity ring. In experiments using cast rings of various conductivity, the casting speed could be increased up to 1.2 times from the current level in the range of 20-50% IACS.
  • Example 4 Various alloys were cast, rolled and drawn in the same manner as in Example 1 using cast rings having different electrical conductivities.
  • the crystal grain size ( ⁇ m) of the ingot was measured by the intersection method in the direction perpendicular to the crystal grain growth direction at a location 2 mm from the ingot surface.
  • the evaluation was performed in the same manner as in Example 1. The results obtained are shown in Table 6.
  • the supercooling near the mold increases and the nucleation frequency increases, and the ingot structure near the ingot surface becomes finer. It became clear that the ingot surface quality could be improved. As a result, surface defects could be reduced, and wire could be drawn without disconnection even with a smaller amount of skin peeling.
  • the conductivity (unit:% IACS) and composition of the cast ring used in Examples 1 to 3 are shown below.
  • This composition is an example when the cast ring is formed of a copper alloy, and may be formed of another copper alloy or the like as long as the electrical conductivity condition is satisfied.
  • Table 7 corresponds to Table 3
  • Table 8 corresponds to Table 4
  • Table 9 corresponds to Table 5.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Continuous Casting (AREA)
  • Metal Rolling (AREA)

Abstract

La présente invention se rapporte à un procédé pour coulée continue de bronze ou d’alliage de bronze qui a une capacité de refroidissement élevée et une meilleure productivité et qui améliore la qualité de surface de lingot. L’invention se rapporte également à un cylindre de coulée utilisée pour ledit procédé. Le procédé de coulée continue utilise un cylindre de coulée ayant une conductivité électrique comprise entre 20 et 50 % IACS compris, lors de la coulée de bronze ou d’un alliage de bronze utilisant le procédé courroie et roue.
PCT/JP2010/061682 2009-07-10 2010-07-09 Procédé pour coulée continue de bronze ou d’alliage de bronze et cylindre de coulée associé WO2011004888A1 (fr)

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JP2009164248A JP2012179607A (ja) 2009-07-10 2009-07-10 銅又は銅合金の連続鋳造方法およびそれに使用する鋳造リング
JP2009-164248 2009-07-10

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012096238A1 (fr) * 2011-01-11 2012-07-19 古河電気工業株式会社 Procédé de coulée continue pour le cuivre ou un alliage de cuivre
JP2021171772A (ja) * 2020-04-21 2021-11-01 日立金属株式会社 銅線製造装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113789459B (zh) * 2021-09-02 2022-07-12 宁波博威合金材料股份有限公司 一种铜镍锡合金及其制备方法和应用

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008266764A (ja) * 2006-06-01 2008-11-06 Furukawa Electric Co Ltd:The 銅合金線材の製造方法および銅合金線材
JP2010188362A (ja) * 2009-02-16 2010-09-02 Mitsubishi Materials Corp Ｃｕ−Ｍｇ系荒引線の製造方法及びＣｕ−Ｍｇ系荒引線の製造装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008266764A (ja) * 2006-06-01 2008-11-06 Furukawa Electric Co Ltd:The 銅合金線材の製造方法および銅合金線材
JP2010188362A (ja) * 2009-02-16 2010-09-02 Mitsubishi Materials Corp Ｃｕ−Ｍｇ系荒引線の製造方法及びＣｕ−Ｍｇ系荒引線の製造装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012096238A1 (fr) * 2011-01-11 2012-07-19 古河電気工業株式会社 Procédé de coulée continue pour le cuivre ou un alliage de cuivre
JP5863675B2 (ja) * 2011-01-11 2016-02-17 古河電気工業株式会社 銅又は銅合金の連続鋳造方法
JP2021171772A (ja) * 2020-04-21 2021-11-01 日立金属株式会社 銅線製造装置
JP7404991B2 (ja) 2020-04-21 2023-12-26 株式会社プロテリアル 銅線製造装置

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TW201111068A (en) 2011-04-01

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