TW201111068A - Method for continuous casting of bronze or bronze alloy and casting ring used therefor - Google Patents

Abstract

Disclosed is a method for continuous casting of bronze or bronze alloy which has a high cooling capacity and superior productivity and which improves ingot surface quality. Also disclosed is a casting ring used for said method. The continuous casting method uses a casting ring having an electrical conductivity of 20 to 50% IACS, inclusive, when casting bronze or a bronze alloy using the belt and wheel method.

Description

201111068 VI. Description of the Invention: [Technical Field] The present invention relates to the manufacture of copper alloy wires used as copper wires or wire harnesses for automobiles, cables for robots, or other signal wires, and the like. A method of continuously casting copper or a copper alloy by a belt & wheel method and a casting ring used therefor. [Prior Art] Generally, the alloy used as a mold is required to have high temperature strength and high thermal conductivity. The material of the casting ring used in the wheel method is mainly a Cu-Cr-Zr alloy or a Cu-Ag alloy of a high conductivity (80 to 95% I ACS) copper alloy with good thermal conductivity. Since the heat conductivity is good, the ingot has excellent cooling capacity and can exhibit high productivity (refer to the patent document 丨). Further, in the early days of the development of the belt casting machine, casting was carried out using an iron casting ring. The electrical conductivity of the cast ring made of iron is 17% lACs, and the thermal conductivity is smaller than that of the copper cast ring, so the cooling capacity is weak, and it is difficult to increase the speed of fabrication. In addition, crack defects occur on the surface of the ring due to the brittleness of iron, and it is impossible to perform a long-time casting operation. Although there is a case where a low conductivity copper alloy such as CBuCr-Zr-A1 is used as a specific example, the mold is not intended to be used for electromagnetic modification. Mixing (for example, refer to Patent Document 2). [Patent Document] Japanese Laid-Open Patent Publication No. 2008-173662 [Patent Document 2] Japanese Patent Application No. 63-145732 (2011) [Invention] In general, 'using Cu-Ag alloy (EC: 92% IACS) and Cu- Since the Cr-Zr alloy (EC: 80% I ACS) copper alloy casting ring has good heat conduction, the molten metal is strongly cooled immediately after it contacts the mold, and therefore, the skin is caused by the air gap caused by solidification shrinkage at the initial stage of solidification. The cooling is suppressed. Therefore, the cooling after the start of solidification becomes uneven, and the thickness of the solidified outer shell is uneven, and cracks are generated in the fragile portion. The fine crack is a thick drawn wire after the calendering step. When it occurs, it will appear as a surface defect, which may cause serious problems such as breakage in the stretching step. In addition, in order to remove the surface defect portion, peeling is performed after rolling, thereby also causing a decrease in yield. Thus, the copper alloy casting ring of bismuth conductivity is excellent in the productivity of the ingot, but there is a problem in the surface quality of the ingot. Therefore, the object of the present invention is It is to provide a continuous bonding method of copper or copper ruthenium which has high cooling ability and excellent productivity, and has an ingot surface and a high quality. The casting ring used in the method is used to obtain various electrical conductivity in order to achieve the above problems. The casting ring's research on the conditions of the surface quality and productivity of the ingot, when casting with a casting ring of less than 2% IACS, the cooling capacity is insufficient, and the productivity is significantly reduced only in the r Drop, so found a casting ring that overcomes the conductivity of this point.

That is, the present invention solves the problem by solving a problem by using a 20% IACS current solution in a continuous casting method. It is a casting of less than 50% IACS by casting a copper or copper alloy by a wheel method. 4 201111068, using a conductivity A (% IACS) having a continuous casting method with respect to the casting metal of the following formula (1), conductivity b (%iacs) (2), as in (1), as the above-mentioned casting ring : 20^B< 0.225XA+27.5 (1) A: Conductivity of cast metal (%IACS) B: Conductivity of cast ring (% IACS). (3) Continuous casting method as (1) printed), wherein the above-mentioned belt The casting method is as follows: the molten liquid in the feeding tank is rotated from the liquid filling port = the rotating roller (four) _) into a belt casting machine composed of a conveyor belt and a roller, and is solidified by cooling to form an ingot. The ingot is: extracted and used as a casting ring of the 滚轮 roller with the above-mentioned specific conductivity of the prayer ring. (4) - The entangled ring is a casting ring having a conductivity of 20% IACS or more and 5% IACS or less when the copper or copper alloy is continuously cast by the belt method. (5) - A continuous casting apparatus" is a belt type continuous casting apparatus which is used for continuous casting of copper or a copper alloy. The crucible is characterized by a casting ring having a crucible conductivity of 2% by % ACS or more and 50% IACS or less. The above-described belt-type continuous casting liquid injection port, and the continuous casting device of the above-mentioned constant conductivity casting ring by the spinning belt casting machine, (6), wherein the device is provided with: The roller formed by the conveyor belt and the roller which is rotated by the melt injection roller is provided with a roller body and a casting method and casting method according to the present invention which has the above-mentioned special steel to provide high-cold steel or copper alloy. Excellent strain, excellent productivity, and excellent surface quality of ingot 201111068 Continuous casting method and casting ring β used in the method [Embodiment] [Casting method, casting ship] FIG. 1 shows a continuous casting method by the present invention. An illustration of an example of all the steps of the obtained ingot to be further made into a wire. A method for producing a copper (or copper alloy) wire, for example, as shown in the drawing, using a shaft furnace in a reducing atmosphere to melt a copper or the like of electrolytic copper to obtain a molten copper, and the molten copper is continuous by the flow channel 2 The ground is guided to the hall slot 3 π. The inside of the rice tank 3 is melted from the main liquid port 4/mainly into a belt-making machine 8β composed of a conveyor belt 6 and a roller 7 that is rotated by a rotating roller, and is cooled and solidified to form a scale 9 The ingot 9 is continuously (four) from the above mold. Although not shown in the same figure, the above roller 7 is composed of a casting ring and a roller body. In a state in which the temperature of the solidified ingot 9 is lowered as much as possible (more than (4)), the continuous calender 10 (two-view or three-roll type) is advanced (four) to a specific wire diameter to make a thick drawing. Wire U. Take the thick drawn wire n directly, or use the map! The drawing calender 12 shown is further calendered to form a stretched material 13 which is taken up on a pallet 14. In Fig. 1, the arrangement of the drawing calender 12 is arbitrary. Next, a preferred embodiment of the belt casting machine used in the belt method of the present invention is shown in the longitudinal section.

_ J Figure 2 is an enlarged cross-sectional view of the III-III line profile. 2 1. Using a drive 22, and a caster casting machine with a moving cast mode, a cast caster belt having a cooling effect with a roller body moving roller 24, 201111068 A casting ring 23 on the outer circumference of the roller body 21. The conveyor belt 22 described above is made of carbon steel or stainless steel. The roller body 21 is made of carbon steel or stainless steel. The casting ring 23 is a material having a specific conductivity described later. The metal spurt 20 is injected into the casting ring 23 on the outer circumference of the roller 21 from the liquid filling port 25. The injected molten metal 26 is cooled in a rotationally moving casting ring and gradually solidifies to form an ingot 27. Fig. 2 schematically shows that the melt solidifies to form an ingot. The casting speed is practically 6 to 15 m / min (100 to 250 mm / Sec) in the normal operation, and the ingot section is 193 〇 mm 2 to 645 〇 mm 2 . [Casting Ring] (Electrical Conductivity) For continuous casting using the belt method, the casting speed is overwhelmingly faster compared to the conventional casting or horizontal horizontal continuous casting method, so the solid-liquid coexistence area is long The ground exists in the casting direction, and the final solidified portion in the metallic copper and copper alloy is also prone to the uneven thickness of the solidified outer shell. Moreover, since the casting ring of high conductivity is excellent in heat conduction, the molten liquid is strongly cooled immediately after it contacts the ring, and therefore, an air gap caused by solidification shrinkage immediately occurs, and cooling is hindered from being cooled. The unevenness causes the thickness of the solidified outer casing to be not fixed. As a result, surface defects of the thick wire are caused, resulting in wire breakage during stretching. Therefore, the inventors have considered that the conductivity of the casting ring is lowered, and it is considered that the electrical conductivity, that is, the casting ring having poor thermal conductivity, is slower in solidification speed, & more stable initial cooling, and the treated copper or copper alloy The relationship between the electrical conductivity and the electrical conductivity of the cast ring was investigated. The results of the study using various alloys having different electrical conductivity indicate that the electrical conductivity (% IACS) of the 201111068 casting ring is preferably 2% by % or less and less than 5% by weight. That is, in the preferred embodiment of the present invention, by using a specific low conductivity copper alloy casting ring, the generation of the air gap immediately after the liquid injection can be extremely effectively suppressed. Therefore, the air gap at the initial stage of solidification can be alleviated to hinder the heat transfer, and the stable cold portion can be formed, and as a result, a stable solidified shell of a uniform sentence without a weak portion can be formed. In addition, since the supercooling becomes large, the nucleation frequency becomes high, and the rust block structure near the surface of the ram block can be made fine. By virtue of this equivalent, the surface quality of the ingot can be improved, and cracks on the surface of the ingot can be suppressed. Further, by improving the ingot I, it is possible to suppress the surface defect of the thick wire, and it is possible not only to improve the quality of the thick wire but also to improve the yield. According to the above, in the case of copper or copper alloy, it is preferable to select a material having a conductivity of 20% IACS or more and 5〇% iacs or less (preferably % IACS or more and 40% IACS or less). It is preferable that the cooling efficiency can be sufficiently ensured by the above lower limit value. It is preferable to maintain the quality of the surface of the ingot well below the above upper limit value. Further, in the present invention, the conductivity refers to a value measured by the measurement method employed in the examples unless otherwise specified. In a preferred embodiment of the present invention, it is preferred to set the electrical conductivity of the cast alloy and the cast ring to the range of the following formula (Π). 20 S b < 0.225xa + 27.5 (Π) a : Casting alloy conductivity (% IACs) b : Casting ring conductivity IACS) The technical significance of the above lower limit is as described above. The formula constituting the right side of the upper limit is an experimentally derived one. By the following, it is possible to make a good casting alloy without breaking the wire without performing peeling. (Alloy) If considering the above-mentioned museums ^., -Η, contention, the alloy material constituting the casting ring is preferably Cu-Cr-Zr~A1 person a. ^ A1 alloy, Cu-Cr alloy, Cu__ Be alloy, phosphor bronze steel, Carson, π + -Zn alloy, etc. The preferred compositions of the various alloys are described below. • Cu—Cr(— Zr— Ai) alloy

Cr 0.2% by mass to 2% 〇 晷 0//± „ - f $ is preferably 0.3% by mass to 1.5% 〜0.30% by mass, more preferably 0.5 mass 5 mass Zr 〇 mass % 〇 · 5 mass ft% Quantitative (preferably 0.08 mass%) A1 〇 mass% to 3.0 mass% (preferably 〇3 mass% to 2.0 mass residual copper and unavoidable impurities • Cu-Be alloy Β"·3 mass% ~3.0% by mass (% by mass) Mass%~2. 〇C° ο.1% by mass% 丨.〇% by mass (% estimated inflammatory mass%) 〇.2% by mass to 0.6% residual copper and inevitable impurities • Phosphor bronze

Sn 1% by mass to 5% by mass (preferably 1 mass 〇P 0.03 mass% to 〇.4 mass% (comparative % to 4 mass%) mass%) 〇·03 mass% 〇] 9 201111068 residual copper And inevitable impurities • Carson alloy

Ni 2% by mass to 5% by mass (preferably 3 Si 0.5% by mass to i.3% by mass f. Mass mass is ° '7 mass%?; residual copper and unavoidable impurities • Cu - Zn alloy %)

Zn 1〇% by mass to 40% by mass (preferably Α 1 mainly 2 ο 曾 0 0 / 贞 quantity % 〜 4 〇 mass residual copper and unavoidable impurities [binding alloy] Considering the wheel method as described above The characteristics of the casting and the phenomenon at the time of casting, in the casting method of the casting ring to which the present invention is applied, it is preferable to granulate the alloy as described below.

Sn 0.1% by mass to 8.8% by mass Residual part of copper and unavoidable impurities • Cu~ Ag alloy Αδ 0.02% by mass to 4.0% by mass Residual part of copper and unavoidable impurities • Carson alloy

Ni 1.5% by mass to 5.0% by mass

Si 0.4% by mass to 1.3% by mass Residual part of copper and unavoidable impurities 10 201111068 • Cr alloy

Cr 〇·3 mass% to 1.5 mass% residual copper and unavoidable impurities • Cu-Cr-Zr alloy

Cr 0.5% by mass to 1.5% by mass

Zr 〇·〇5 mass%~〇.5 mass% Residual copper and unavoidable impurities [Examples] Next, the present invention will be described in further detail based on examples, but for example, samples and production conditions thereof are merely specific examples. The present invention is not limited to this. [Example 1] As shown in Tables 1 to 3, cast rings each having a conductivity of 13 to 80% IACS and a cross-sectional area of 3220 mm 2 were used. The composition of the human gold constituting the casting ring is collectively described in the following examples and comparative examples. Manufacture of φ of 0.7% Sn-containing refined copper (refer to Table 1), Cu -l%Cr alloy (refer to Table 2) and Cu-2.5% Ni-〇.6 by the SCr method at a casting speed of 20 ton/hour. The alloy thick wire of %Si Carson alloy (refer to Table 3) is stretched to (D〇.lmm) Tables 1 to 3 show the detection results of the eddy current flaw detector according to the manufacture of the thick wire and the rough wire stripping. The result of determining whether the finished product is good or not when the skin is stretched. [Measurement of Conductivity] The conductivity of the casting ring is measured using the AutoSigma 3 000 manufactured by GE Inspection Technologies to measure the polished surface of the casting ring. The rate measurement is carried out at room temperature (23 ° C.) 201111068 The results of the eddy current flaw detector shown in Tables 1 to 3, when the skin is not peeled, 'the micro defects that will not be broken are set to s The defect that causes the disconnection is rarely set to "m", and the serious defect that causes the disconnection is "1", and the number of each detected by each lton is counted. Further, the various defects are weighted to s. =l, m = 20, 1=1 〇〇, comprehensive evaluation of the flaw detection results with their total value d When the total value d is less than 5, the evaluation is "◎", the 50 or more is evaluated as "〇", and the one or more is evaluated as "χ". Further, the amount of peeling and the disconnection are determined. When the thickness of the φ 8 mm thick wire 5 〇〇〇 kg is peeled and stretched to Φ 0.1 mm on the one side of 0 to 〇. 3 mm, the wire breaker is evaluated as "χ", and the wire is not broken. The evaluation is "〇" ^ In the "Evaluation" of the rightmost block in Tables 1 to 3, when the one side is peeled to 〇mm or 0.1mm, the unbroken person is evaluated as "〇", and the one side is peeled. When 〇mm and 〇'lmm are broken, the unilateral peeling is 〇. When 2mm is not broken, the evaluation is △"" unilateral peeling is 〇. 2mm, the disconnected person is evaluated as "χ". 201111068 [Table i] 0.7%Sn-TPC Casting speed: 20ton/hour After-wafer area: 3220mm Casting ring flaw detection (number / ton; ^l flaw detection evaluation (※) Peeling amount (钔) Evaluation of conductivity S m 1 d Good or not judged mm ◎ 0 〇25 28 0.1 0 30 0.1 〇〇0.2 〇30 17 0 〇0.1 0 19 ◎ 0.1 〇〇Inventive example 0.2 Ο 39 25 0.1 0 〇0 27 ◎ 0.1 〇. 〇0.2 Ο 45 44 0.2 84 〇0 〇1 0.1 〇〇0.2 Π 15 C1 0.9 0.1 79 〇0 X ^ 1 0.1 XX 0.2 X 56 75 3.1 0.5 187 0 XX 0.1 X Δ 0.2 〇Comparative example rc 97 3.4 0.7 235 0 ·— 一〇JX 0.1 X Λ 0.2 〇-----_ 73 115 4.1 1.4 337 X 0.1 0.2 0 3 >rv X 80 142 6.1 2.4 504 X 0.1 A 0.2 Ω fly X v ~ X — 1 Λ ～ _ s s: does not affect the defect of the disconnection m: the defect that causes the disconnection very rarely 1 : the defect that caused the disconnection ※3 *3 〇:^+10°"敝 quantity: one side ◎: not Up to 50 X: 100 or more will stretch <D8mm thick wire 5000 kg to (D.lmm break determination Ο: no break X: broken wire 13 201111068 [Table 2]

Cu-1%Cr production speed: 20ton/hour Ingot casting area: 3220mm2

Casting ring flaw detection (one /ton^l flaw detection evaluation (※) Peeling amount 丨 ※〗) Evaluation of conductivity S m 1 d Good or not judgement mm 0 〇25 25 0.1 0 27 ◎ 0.1 〇〇0.2 〇0 〇32 27 0.8 0.07 50 ◎ 0.1 〇〇 Inventive Example 0.2 〇0 〇38 38 1.1 0.08 68 ◎ 0.1 〇〇0.2 〇0 X 44 51 1.6 0.14 97 〇0.1 〇〇0.2 〇0 X 13 45 1.1 0.3 97 〇0.1 XX 0.2 X 0 X 58 68 2.1 0.2 130 X 0.1 X Δ 0.2 〇 0 X Comparative Example 66 101 3.5 0.7 241 X 0.1 X Δ 0.2 〇 0.1 X 72 124 4 1.5 354 X 0.2 XX 0.3 X 0.1 X 80 142 6.1 2.4 504 X 0.2 XX 0.3 X 14 201111068 [Table 3] _Cu—2.5%Ni—0.6%Si Casting speed: 20ton/hour Town block sectional area: 3220mm2

Casting ring casting ring flaw detection defect (number / ton) ※l flaw detection evaluation (※) peeling amount (*3) evaluation No. Conductivity S m 1 d good or bad judgment mm 0 〇1-1 26 21 0.3 0 27 ◎ 0.1 〇〇0.2 〇0 X 1-2 31 35 1.1 0.08 65 ◎ 0.1 〇〇Inventive Example 0.2 〇0 X 1-3 39 44 1 0.2 84 〇0.1 〇〇0.2 〇0 X 1-4 43 49 2 0 89 〇0.1 〇〇0.2 〇0 X 1-5 16 38 0.8 0.2 74 〇0.1 XX 0.2 X 0 X 1-6 55 58 1.4 0.3 116 X 0.1 X Δ 0.2 〇0 X Comparative Example 1-7 62 88 2.7 0.5 192 X 0.1 X Δ 0.2 〇0.1 X 1-8 71 101 4 1.5 331 X 0.2 XX 0.3 X 0.3 X 1-9 80 97 3.4 1.2 285 X 0.2 XX 0.3 X 15 201111068 Any alloy used above 2〇%, 〇5% The results of the flaw detection and the judgment of the broken wire in the casting ring under IACS# are excellent results. Further, in the case of using a casting ring of less than 20% IACS, the cooling capacity is insufficient, so that the supply of the smelting liquid to the center of the block is insufficient, which causes a large shrinkage and causes a disconnection failure. It can be seen that the casting ring which does not exceed 50% 1 can prevent the surface from deteriorating due to the occurrence of fine cracks on the surface of the ingot as described above. Therefore, it is preferable that [the second embodiment] is used for various alloys having electrical conductivity not shown in Table 4. The casting ring having the indicated electrical conductivity was evaluated by the same conditions as in Example 实施, and evaluated in the same manner as in Example 。. Among the results, especially those with good results and not the same are shown in Table 4 and Figure 4. In addition, the "better conductivity b" in Table 4 means that the electrical conductivity of the alloy 3 satisfies the value of (0.22 5xa + 27·5) of the following formula (II), whereas the "casting ring conductivity" "" means the conductivity of the casting ring actually used. In this case, "consistent with b" means "the conductivity of the casting ring actually used is in accordance with the following formula (Η) σ"'. The conductivity of the casting ring actually used is in the following formula ( In the range of b of η), it is evaluated as "〇", and the conductivity of the casting ring actually used is larger than the upper limit of b of the following formula (11), and is evaluated as "Δ" when it is 5 % IACS or less. As a result of tests conducted on various alloys having different electrical conductivity, it is particularly preferable to select a material of the casting ring according to the following formula (11). 20 ^ b < 〇.225xa+ 27.5 (II) a: Conductivity of cast alloy (% I ACS) b : cast ring conductivity (% IACS) 201111068 ΝεαΙ0ίΝ (Ν£: boat 衮 衮 J Jnoq\uos3 : ^ ^ Thickness of the curtain (*3) Disconnection judgment 〇〇〇〇〇〇〇〇〇X 〇〇X 〇〇X 〇〇mm 〇5 (N 〇o <N oo cs ooo (N dor-< ( N 〇oo (N 〇 flaw detection evaluation (:※2) Good or not ◎ ◎ ◎ 〇O 〇Ό S\ s flaw detection (one / 拗 ※ ※! — 〇oo 0.12 0.14 CN 〇E 〇1—1 mo VO Vi (N 9 m 5 and b are in accordance with 〇〇〇0 0 <] casting ring|conductivity cn ^T) (N casting ring No. <N < N (N 2-3 inch I (N 2-5 V〇1 (N more ideal conductivity b in mm (N m in ΓΛ ΓΛ <N m alloy conductivity a (N r- (N alloy type 0.3% Sn-TPC Cu-1% Cr Cu-2.5% Ni -0.6% Si 1 i 0.3% Sn-TPC Cu-l% Cr Cu-2.5% Ni-0.6% Si Inventive Example 1 The present invention 2 τχ-t 〇〇一: x os坩咚: ◎ T3 OS : 〇χοοι+εχοίΝ+SHP (2) ※ 绍袅W录备ΙΛΓ ΙΛΓ>: 1 .. ε ^¥r? 龅磙 龅磙 K·: s一※ 诸杯:X 驽益璀:〇wf# 璲 ν^εε“οφ^φ43>Ι 诸 璁 and 璁εωοοφ real! i 201111068 [Example 3] Implementation of casting speed change In the same manner as in Example 1, Cu- 2.5% Ni-0.6% Si-Carson alloy was cast in the same manner as in Example 1 except that the casting speed was changed by using various casting rings having the electrical conductivity shown in Table 5 at a cross-sectional area of 3120 mm2. The casting speed Vr as the relative speed is evaluated by the casting speed V' of the conventional casting speed V〇 (200 mm/sec) using a casting ring of 8〇% iACS. Vr = V / V 〇. If the casting speed is too fast with respect to the cooling rate, the ingot temperature becomes too high, and the strength of the ingot is lowered to cause a crack 'or a large shrinkage at the center of the block, which is a cause of disconnection. Therefore, it is judged whether or not the 5,000 mm thick wire 5000 kg is unilaterally peeled by 0.1 mm, and the unbroken one is evaluated as "〇", and the disconnected person is evaluated as "X". The results are shown in Table 5. [Table 5] Ingot section area: 3200 mm2 casting alloy: - 2.5% Ni - 0.6% Si

Casting Ring No. Casting Ring Conductivity (% IACS) Casting Speed: Relative Speed Based on EC80% IACS Casting Speed 0.9 1 1.05 1.1 1.15 12 Inventive Example 3-1 44 〇〇〇〇〇〇3-2 31 〇〇〇〇〇〇3 — 3 25 〇〇〇Ο X Comparative Example 3-4 80 〇〇XXXX 3-5 71 〇〇XX ~~~X~ X 3 — 6 ___ 65 〇〇〇X ---- X 3-7 _ 55 〇〇〇X -W— X 3 — 8 ____15 XXXV 租·1ηιιη peeling and stretching s after the renting step, Π 1 mm /\ Π主今χ XX: There is a broken line 201111068 The casting ring having the conductivity in the range specified in the present invention can suppress the formation of the air gap, so that the casting ring of higher conductivity can be strongly cooled in the initial stage of solidification, and the conductivity is higher than that of iron. The casting ring allows the overall cooling capacity to be higher than the high conductivity ring. In experiments using casting rings of various conductivity, the casting speed of the current conductivity of 20 to 50% IACS can be increased by a maximum of 1.2 times compared with the current state. [Example 4] Various alloys were cast, rolled, and drawn in the same manner as in Example 1 using casting rings having different electrical conductivity. The crystal grain size U m) of the ingot was measured by a line method in a direction perpendicular to the growth direction of the crystal grains at a position 2 mm from the surface of the ingot. Further, evaluation was performed in the same manner as in the examples. The results obtained are shown in Table 6. 19 201111068 εΕ0<Ν<Ν£:*喵众衮浓 Jnoq\uoo<N:^t«/^

[9<J 1 evaluation I ◎ ◎ ◎ XXX peeling amount (*3) Disconnection judgment 〇〇〇〇〇〇〇〇〇XXXXXXXXX mm 〇5 (N 〇o CN 〇o <N 〇oo (N dod &lt ;N 〇oo <N 〇 flaw detection evaluation (※) Good or not ◎ ◎ ◎ XXX *〇二342 m 338 flaw detection (/ton;^l — 〇ooh in ε 〇o — <N <N (Λ κη (N ss ingot surface 2mm; crystal grain size (μπι) 0.44 0.36 0.42 1.21 o 1.14 casting ring @electricity 3 κη (N IQ r- alloy type 0.3%Sn-TPC Cu-l%Cr Cu- 2.5% Ni-0.6Si 0.3% Sn-TPC Cu-l% Cr Cu-2.5% Ni-0.6Si Inventive Example Comparative Example 201111068 It is understood that compared with the comparative example, it is understood that the range specified by the present invention is low. The casting ring of conductivity, the supercooling near the mold becomes larger, the nucleation frequency becomes higher, the ingot structure near the surface of the ingot is finer, and the surface quality of the ingot can be improved. As a result, surface defects can be reduced. The amount of peeling may be reduced, and stretching may be performed without breaking. Hereinafter, the electrical conductivity (unit: % IACS) and composition of the casting ring used in Examples 1 to 3 are shown. An example of the case where the alloy forms a casting ring may be formed by using another copper alloy or the like as long as the condition of the electrical conductivity is satisfied. Further, Table 7 corresponds to Table 3, and Table 8 corresponds to Table 4, and Table 9 corresponds to Table 4. Corresponding to Table 5. [Table 7] (Example 1) Unit mass% Casting ring conductivity Ni Si Sn P Cr Zr A1 Co Be Zn Residual portion 1-1 26 0.5 2 Cu unavoidable impurities 1-2 31 1.5 0.3 2.0 Cu inevitable impurities 1-3 39 1.5 0.3 1.0 Cu inevitable impurities 1-4 43 2.8 0.7 Cu inevitable impurities 1 - 5 16 6 0.03 Cu inevitable impurities 1-6 55 1.8 0.5 Cu inevitable Impurity 1-7 62 1.2 0,3 Cu unavoidable impurities 1-8 71 0.4 Cu unavoidable impurities 1-9 80 0.7 0.06 Cu unavoidable impurities [Table 8] (Example 2) Unit mass % Cast ring conductive Ni Si Sn P Cr Zr A1 Co Be Zn Residual part 2-1 35 Cu unavoidable impurity 2-2 25 0.6 2 Cu unavoidable impurity 2-3 25 40 Cu unavoidable impurity 2-4 47 10 Cu unavoidable impurity 2-5 48 1.0 0.2 0.5 Cu unavoidable impurities 2-6 45 2.5 0.5 Cu inevitable impurities 21 201111068 [Table 9] (Example 3) Casting ring conductivity

Si Sn

Cr

Zr

Co 2.5 0.6 Residual part 1-2 3 — 3 3-4 31 1〇" 1.5 0,3 0.6 0.7 0.1 71 0.4 3 — 6 Bu 7 1 — 8 65 55ΤΓ 1.8 0.3 0.4 gu Inevitable miscellaneous y _Cu is inevitable Miscellaneous essays Cu inevitable vocabulary 0.03

The inevitable ambiguity of Cu _ Cu is unavoidable. Although the present invention and its embodiment are described above, the present invention is not limited thereto, and even if it is used in the description of the present invention, The politicians and politicians should make the widest interpretation in the spirit and scope of the invention not in violation of the scope of the patent application in this case. The present invention claims to be based on the priority of the Japanese Patent Application No. 2_i 64248 on July 1st, 2009. The present invention refers to this application and adds its contents as part of the description of this specification. . BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic explanatory view showing a step of manufacturing a wire in a continuous casting method using a belt method according to the present invention. Fig. 2' is a cross-sectional view schematically showing a preferred embodiment of the belt casting machine used in the continuous casting method of the present invention. Fig. 3' is an enlarged cross-sectional view showing a section of the casting machine shown by the circle 2, taken along line (1). Figure 4' shows the conductivity of the alloy and the conductivity of the cast ring. 22 201111068 [Main component symbol description] 1 Shaft furnace 2 Guide chute 3 Feed tank 4 Filling port 5 Melt 6 Conveyor belt 7 Roller 8 Belt casting machine 9 Ingot 10 Continuous calender 11 Thick wire rod 12 Tensile calender 13 Tensile material 14 Pallet 21 Roller 22 Conveyor belt 23 Casting ring 24 Drive roller 25 Filling port 26 Melt 27 Ingot 23

Claims (1)

201111068 VII. Patent application scope: 1. A continuous casting method, when casting copper or copper alloy by the wheel method, using a casting ring with a conductivity of 20% IACS or more and 50% IACS or less. 2_ As in the continuous casting method of claim 1, the conductivity (IACS) with respect to the cast metal is used, and the conductivity B (% IACS) satisfying the following formula (1) is used as the casting ring, 20^B< 0.225XA+ 27.5 (I) A: Conductivity of cast metal (%IACS) B: Conductivity of cast ring (% IACS). 3. The continuous casting method of claim 2 or 2, wherein the δHai belt method is a casting method in which the molten liquid in the feeding tank is fed from the liquid injection port to the rotation by the rotating roller. The belt casting machine consisting of a conveyor belt and a roller is cooled and solidified to form an ingot, and the ingot is continuously withdrawn from the mold; a casting ring having the specific conductivity is used as a casting ring constituting the roller. 4. A casting ring which is a casting ring having a conductivity of 2% by weight or more and 15% by weight or less, which is used for continuous casting of copper or a copper alloy by a belt method. A continuous casting apparatus which is a continuous belt-type continuous casting apparatus for copper or copper alloy, characterized in that: a scale-forming ring having a conductivity of 20% IACS or more and 50% IACS or less is used. 6. The continuous casting apparatus according to claim 5, wherein the belt type continuous casting apparatus comprises: an injection liquid for injecting a molten liquid in the feeding tank: a shovel: a conveyor belt that is rotated by a rotating roller and The roller is composed of: a scale machine, which is provided with a roller body and a casting ring having the specific conductivity 24 201111068. Eight, schema · (such as the next page) 25