JPH06279894A - Copper alloy excellent in strength and electrical conductivity - Google Patents
Copper alloy excellent in strength and electrical conductivityInfo
- Publication number
- JPH06279894A JPH06279894A JP5090832A JP9083293A JPH06279894A JP H06279894 A JPH06279894 A JP H06279894A JP 5090832 A JP5090832 A JP 5090832A JP 9083293 A JP9083293 A JP 9083293A JP H06279894 A JPH06279894 A JP H06279894A
- Authority
- JP
- Japan
- Prior art keywords
- copper alloy
- strength
- subjected
- copper
- alloy
- Prior art date
- Legal status (The legal status 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 status listed.)
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、超強磁場発生装置の
導電材料に用いられる強度および導電性に優れた銅合金
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copper alloy having excellent strength and conductivity which is used as a conductive material for a super strong magnetic field generator.
【０００２】[0002]
【従来の技術】従来、超強磁場を発生せしめるマグネッ
トに用いられる導電材料は強磁場により発生する強い電
磁力に抗しうる強度および大電流を流してもジュール熱
発生の少ない高導電特性を有する材料が要求されてい
る。2. Description of the Related Art Conventionally, a conductive material used for a magnet for generating a super strong magnetic field has a strength capable of withstanding a strong electromagnetic force generated by a strong magnetic field and a high conductive characteristic that a Joule heat is hardly generated even when a large current is applied. Material is required.
【０００３】かかる材料として、近年、Ａｇ：２〜６０
重量％、残部：ＣｕからなるＡｇ含有銅合金が提案され
ている（例えば、日本金属学会誌 第５５巻 第１２号
（１９９１） Ｐ１３８２〜１３９１参照）。As such a material, in recent years, Ag: 2 to 60
An Ag-containing copper alloy composed of weight% and balance: Cu has been proposed (see, for example, Journal of the Japan Institute of Metals, Vol. 55, No. 12 (1991) P1382-1391).
【０００４】[0004]
【発明が解決しようとする課題】しかし、前記従来のＡ
ｇ含有銅合金は、８０Ｔ以上の強磁場発生時に生じる応
力に対して十分に耐えうる強度を有するものではなく、
なお一層優れた強度および導電性を有する銅合金が求め
られていた。However, the conventional A
The g-containing copper alloy does not have sufficient strength to withstand the stress generated when a strong magnetic field of 80 T or more is generated,
There has been a demand for copper alloys having even higher strength and conductivity.
【０００５】[0005]
【課題を解決するための手段】そこで、本発明者らは、
従来よりも高強度でかつ高導電性を有する銅合金を得る
べく研究を行った結果、Ａｇ：８．０〜２０．０重量
％、Ｃｒ：０．１〜１．０重量％を含有し、残りがＣｕ
および不可避不純物からなる組成を有する銅合金鋳塊を
冷間加工と時効を繰り返すことにより得られた初晶およ
び共晶の２相が繊維状に配向した素地中にＣｒの微細な
析出物が分散している組織を有する銅合金は、前記従来
のＡｇ含有銅合金に比べて強度および硬さが大幅に向上
するだけでなく、さらにその半軟化温度（加工材を１時
間焼鈍した時の強度が焼鈍しない加工材の強度の１／２
になる焼鈍温度）が高くなり耐熱性が向上するという知
見を得たのである。Therefore, the present inventors have
As a result of research to obtain a copper alloy having higher strength and higher conductivity than before, Ag: 8.0 to 20.0 wt%, Cr: 0.1 to 1.0 wt% are contained, The rest is Cu
Fine precipitates of Cr are dispersed in a matrix having primary and eutectic two-phase fibrous orientation obtained by repeating cold working and aging of a copper alloy ingot having a composition of unavoidable impurities The copper alloy having a microstructure not only has a significantly improved strength and hardness as compared with the conventional Ag-containing copper alloy, but also has a semi-softening temperature (the strength when the worked material is annealed for 1 hour is 1/2 the strength of non-annealed material
It has been found that the annealing temperature) becomes higher and the heat resistance is improved.
【０００６】この発明は、かかる知見にもとづいてなさ
れたものであって、Ａｇ：８．０〜２０．０重量％、Ｃ
ｒ：０．１〜１．０重量％を含有し、残りがＣｕおよび
不可避不純物からなる組成、並びに初晶および共晶が繊
維状に配向した素地中にＣｒの微細な析出物が分散して
いる組織を有する強度および導電性に優れた銅合金、に
特徴を有するものである。The present invention has been made on the basis of such knowledge, and Ag: 8.0 to 20.0% by weight, C
r: 0.1 to 1.0% by weight, the balance consisting of Cu and unavoidable impurities, and fine precipitates of Cr dispersed in a base material in which primary crystals and eutectics are oriented in a fibrous state. It is characterized by a copper alloy having a strong texture and excellent conductivity.
【０００７】この発明の銅合金を製造するには、まず、
電気銅を不活性ガス中で溶解し、得られた溶湯にＡｇお
よびＣｒを添加して成分組成調整し、鋳造して鋳塊を製
造する。この鋳塊を６００〜７００℃で熱間鍛造もしく
は熱間圧延を施した後、溶体化処理し、さらに冷間加工
と時効処理を繰り返して施すことにより製造される。こ
のようにして得られたこの発明の銅合金は、Ｃｕ初晶お
よびＣｕとＡｇ固溶体の共晶が繊維状に配向して強化さ
れた素地中にＣｒの微細な析出物が分散した組織を有し
ている。To produce the copper alloy of the present invention, first,
Electrolytic copper is melted in an inert gas, Ag and Cr are added to the resulting molten metal to adjust the component composition, and the ingot is manufactured by casting. This ingot is hot-forged or hot-rolled at 600 to 700 ° C., solution-treated, and then repeatedly subjected to cold working and aging treatment. The thus obtained copper alloy of the present invention has a structure in which fine precipitates of Cr are dispersed in the base material reinforced by the primary crystal of Cu and the eutectic of Cu and Ag solid solution oriented in a fibrous shape. is doing.
【０００８】つぎに、この発明の銅合金の成分組成を上
記のごとく限定した理由について説明する。Next, the reason why the composition of the copper alloy of the present invention is limited as described above will be explained.
【０００９】（ａ） Ａｇ Ａｇは、Ｃｕに固溶あるいはＣｕとの共晶組織として晶
出され、合金の強度および硬さを向上させる作用がある
が、８．０重量％未満では素地がＡｇ固溶体単相となっ
て特に繊維強化できないので好ましくなく、一方、２
０．０重量％を越えて含有しても、高温下での強度の著
しい向上は見られないので経済的にも好ましくない。し
たがって、Ａｇの含有量は、８．０〜２０．０重量％に
定めた。(A) Ag Ag is crystallized as a solid solution in Cu or as a eutectic structure with Cu, and has the effect of improving the strength and hardness of the alloy, but if it is less than 8.0% by weight, the base material is Ag. It is not preferable because it becomes a solid solution single phase and cannot be particularly reinforced with fibers.
Even if the content is more than 0.0% by weight, the strength is not significantly improved at high temperatures, which is economically unfavorable. Therefore, the content of Ag is set to 8.0 to 20.0% by weight.
【００１０】（ｂ） Ｃｒ Ｃｒは、Ａｇとともに素地に固溶し、その後の時効処理
によるＣｒの微細な析出により合金の強度および硬さを
改善する作用があり、さらに高温での強度を改善する作
用があるが、０．１重量％未満ではその効果がなく、一
方、１．０重量％を越えて含有すると、鋳造時に粗大な
Ｃｒ晶出物を生じやすく、強度の向上も期待できなく、
さらに導電率が低下するようになるので好ましくない。
したがって、Ｃｒの含有量は、０．１〜１．０重量％に
定めた。(B) Cr Cr, together with Ag, forms a solid solution in the base material, and has a function of improving the strength and hardness of the alloy by fine precipitation of Cr by the subsequent aging treatment, and further improves the strength at high temperature. Although it has an effect, if it is less than 0.1% by weight, it has no effect. On the other hand, if it exceeds 1.0% by weight, coarse Cr crystallized substances are likely to occur during casting, and improvement in strength cannot be expected.
Further, the conductivity is lowered, which is not preferable.
Therefore, the content of Cr is set to 0.1 to 1.0% by weight.
【００１１】[0011]
【実施例】つぎに、この発明の銅合金を実施例により具
体的に説明する。EXAMPLES Next, the copper alloy of the present invention will be specifically described by way of examples.
【００１２】Ａｒ雰囲気中で溶解、鋳造し、表１に示さ
れる成分組成のＣｕ合金鋳塊を製造し、このＣｕ合金鋳
塊を圧下率：５０％の冷間圧延を施し、さらに温度：４
００℃、１時間保持の中間時効処理を施し、この中間時
効処理施した本発明銅合金１〜６および比較銅合金１〜
３の組織をＳＥＭで観察したところ、Ｃｕ初晶およびＣ
ｕとＡｇの共晶からなる２相の繊維状に配向した素地中
にＣｒの微細な析出が分散しているのが見られた。Melt and cast in an Ar atmosphere to produce a Cu alloy ingot having the composition shown in Table 1. The Cu alloy ingot is subjected to cold rolling at a rolling reduction of 50% and further at a temperature of 4
The present invention copper alloys 1 to 6 and comparative copper alloys 1 to 6 subjected to the intermediate aging treatment of holding at 00 ° C. for 1 hour
When the structure of No. 3 was observed by SEM, Cu primary crystal and C
It was found that fine precipitates of Cr were dispersed in the two-phase fibrous matrix composed of a eutectic of u and Ag.
【００１３】上記中間時効処理を施した本発明銅合金１
〜６、比較銅合金１〜３および従来銅合金をさらに圧下
率：９５％の最終冷間圧延を施すことにより本発明銅合
金１〜６、比較銅合金１〜３および従来銅合金を製造し
た。上記比較銅合金１〜３は、成分含有量がこの発明の
範囲から外れたものである（表１において、この発明の
範囲から外れた値に＊印しを付して示した）。The copper alloy of the present invention 1 which has been subjected to the above-mentioned intermediate aging treatment.
~ 6, comparative copper alloys 1 to 3 and conventional copper alloy were further subjected to final cold rolling at a rolling reduction of 95% to produce inventive copper alloys 1 to 6, comparative copper alloys 1 to 3 and conventional copper alloy. . The comparative copper alloys 1 to 3 have component contents outside the range of the present invention (in Table 1, values outside the range of the present invention are marked with *).
【００１４】これら本発明銅合金１〜６、比較銅合金１
〜３および従来銅合金のビッカース硬さ、導電率および
引張り強さを測定し、さらに加工材を１時間焼鈍した時
の強度が焼鈍しない加工材の強度の１／２になる焼鈍温
度を半軟化温度として求め、これらの測定結果も表１に
示した。The present invention copper alloys 1 to 6 and comparative copper alloy 1
~ 3 and Vickers hardness, electrical conductivity and tensile strength of conventional copper alloys are measured, and the annealing temperature of the processed material for 1 hour is half softened at the annealing temperature, which is half the strength of the unannealed material. The temperature was determined and the results of these measurements are also shown in Table 1.
【００１５】[0015]
【表１】 [Table 1]
【００１６】表１に示される結果から、中間時効処理し
たのち最終冷間圧延した本発明銅合金１〜６は、いずれ
も中間時効処理したのち最終冷間圧延した従来銅合金に
比べて、導電率はほぼ同等であるが、ビッカース硬さお
よび引張り強さが格段に優れており、さらに半軟化温度
が大幅に向上していることから耐熱性にも優れているこ
とがわかる。また比較銅合金１〜３に見られるように、
成分組成がこの発明の範囲から外れると、ビッカース硬
さ、引張り強さ、導電率および半軟化温度のうち少なく
ともいずれかの性質が従来銅合金とほぼ同等または従来
銅合金よりも劣ったものとなることもわかる。From the results shown in Table 1, the copper alloys 1 to 6 of the present invention, which were subjected to the intermediate aging treatment and then the final cold rolling, were more conductive than the conventional copper alloys which were subjected to the intermediate aging treatment and then the final cold rolling. Although the rates are almost the same, it can be seen that the Vickers hardness and the tensile strength are remarkably excellent, and the semi-softening temperature is significantly improved, so that the heat resistance is also excellent. Also, as seen in the comparative copper alloys 1 to 3,
If the component composition deviates from the range of the present invention, Vickers hardness, tensile strength, electrical conductivity and at least one of the semi-softening temperature properties are almost equal to or inferior to conventional copper alloys. I also understand that.
【００１７】[0017]
【発明の効果】上述のように、冷間圧延と時効処理を繰
り返し、最終的に冷間圧延することにより得られた線材
または板材を用いて、従来よりも優れた特性を有する超
強磁場発生装置の導電コイルを製造することができ、工
業上優れた効果をもたらすものである。As described above, by using the wire rod or plate obtained by repeating cold rolling and aging treatment and finally cold rolling, generation of an ultra-high magnetic field having characteristics superior to conventional ones. The conductive coil of the device can be manufactured, and the industrially excellent effect is brought about.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 和田 仁 茨城県つくば市千現１−２−１ 科学技術 庁 金属材料技術研究所 筑波支所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hitoshi Wada 1-2-1 Sengen, Tsukuba, Ibaraki Prefectural Government, Science and Technology Agency, Research Institute for Metals, Tsukuba Branch
Claims (1)
０．１〜１．０重量％を含有し、残りがＣｕおよび不可
避不純物からなる組成、並びに初晶および共晶が繊維状
に配向した素地中にＣｒの微細な析出物が分散している
組織を有することを特徴とする強度および導電性に優れ
た銅合金。1. Ag: 8.0 to 20.0% by weight, Cr:
Structure containing 0.1 to 1.0% by weight, the balance consisting of Cu and unavoidable impurities, and a structure in which fine precipitates of Cr are dispersed in a matrix in which primary crystals and eutectic are oriented in a fibrous state. A copper alloy excellent in strength and conductivity, characterized by having
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09083293A JP3407054B2 (en) | 1993-03-25 | 1993-03-25 | Copper alloy with excellent heat resistance, strength and conductivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09083293A JP3407054B2 (en) | 1993-03-25 | 1993-03-25 | Copper alloy with excellent heat resistance, strength and conductivity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06279894A true JPH06279894A (en) | 1994-10-04 |
| JP3407054B2 JP3407054B2 (en) | 2003-05-19 |
Family
ID=14009566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09083293A Expired - Lifetime JP3407054B2 (en) | 1993-03-25 | 1993-03-25 | Copper alloy with excellent heat resistance, strength and conductivity |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3407054B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1143021A1 (en) * | 2000-04-05 | 2001-10-10 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Copper base alloy and methods for producing casting and forging employing copper base alloy |
| EP1338662A1 (en) * | 2002-02-21 | 2003-08-27 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Cu-based alloy and method of manufacturing high strength and high thermal conductive forged article using the same |
| JP2008248325A (en) * | 2007-03-30 | 2008-10-16 | Nikko Kinzoku Kk | High strength and high electric conductivity heat resistant copper alloy foil |
| JP2010070856A (en) * | 2009-12-14 | 2010-04-02 | Nippon Mining & Metals Co Ltd | Copper alloy for electronic appliance |
| CN106676314A (en) * | 2016-12-28 | 2017-05-17 | 北京有色金属研究总院 | Preparation method for Cu-Ag alloy with high-strength and high-conductivity performance |
| CN115464406A (en) * | 2022-08-30 | 2022-12-13 | 南京理工大学 | High-strength high-conductivity CuCr copper intermediate alloy and preparation method thereof |
-
1993
- 1993-03-25 JP JP09083293A patent/JP3407054B2/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1143021A1 (en) * | 2000-04-05 | 2001-10-10 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Copper base alloy and methods for producing casting and forging employing copper base alloy |
| KR100415270B1 (en) * | 2000-04-05 | 2004-01-14 | 이시카와지마-하리마 주고교 가부시키가이샤 | Copper Base Alloy, and Methods for Producing Casting and Forging Employing Copper Base Alloy |
| US6679955B2 (en) | 2000-04-05 | 2004-01-20 | Ishikawajima-Harima Heavy Industries, Co., Ltd. | Copper base alloy casting, and methods for producing casting and forging employing copper base alloy casting |
| US7204893B2 (en) | 2000-04-05 | 2007-04-17 | Ishikawajima-Harima Heavy Industries, Co., Ltd. | Copper base alloy casting, and methods for producing casting and forging employing copper base alloy casting |
| EP1338662A1 (en) * | 2002-02-21 | 2003-08-27 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Cu-based alloy and method of manufacturing high strength and high thermal conductive forged article using the same |
| US7172665B2 (en) | 2002-02-21 | 2007-02-06 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Cu-based alloy and method of manufacturing high strength and high thermal conductive forged article using the same |
| JP2008248325A (en) * | 2007-03-30 | 2008-10-16 | Nikko Kinzoku Kk | High strength and high electric conductivity heat resistant copper alloy foil |
| JP2010070856A (en) * | 2009-12-14 | 2010-04-02 | Nippon Mining & Metals Co Ltd | Copper alloy for electronic appliance |
| CN106676314A (en) * | 2016-12-28 | 2017-05-17 | 北京有色金属研究总院 | Preparation method for Cu-Ag alloy with high-strength and high-conductivity performance |
| CN115464406A (en) * | 2022-08-30 | 2022-12-13 | 南京理工大学 | High-strength high-conductivity CuCr copper intermediate alloy and preparation method thereof |
| CN115464406B (en) * | 2022-08-30 | 2023-08-04 | 南京理工大学 | High-strength high-conductivity CuCr copper intermediate alloy and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3407054B2 (en) | 2003-05-19 |
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