JPS61119660A - Manufacture of copper alloy having high strength and electric conductivity - Google Patents

Abstract

PURPOSE:To manufacture a Cu alloy having high strength and electric conductivity without carrying out hot rolling by continuously casting a Cu alloy ingot contg. specified percentages of Ni and Si and by subjecting the ingot to cold rolling and heat treatment under specified conditions. CONSTITUTION:A Cu alloy ingot consisting of 0.4-4.0wt% Ni, 0.1-1.0wt% Si and the balance Cu with inevitable impurities is manufactured by continuous casting. The ingot is cold rolled at 40-95% draft and heat treated at 350-700 deg.C for 30sec-10hr in a reducing or inert atmosphere to obtain a Cu alloy having high strength and electric conductivity. A material of a desired thickness having desired hardness and elongation is obtd. by further subjecting the Cu alloy to proper cold working and heat treatment as required.

Description

【発明の詳細な説明】 本発明は、トランジスタや工０などの集積回路等、半導
体部品のリード材を始めとし、端子。DETAILED DESCRIPTION OF THE INVENTION The present invention is applicable to lead materials for semiconductor components such as transistors and integrated circuits, as well as terminals.

コネクター、ばね材等にも広く用いられる高力高導電性
銅基合金の製造方法に関する。This invention relates to a method for manufacturing a high-strength, high-conductivity copper-based alloy that is widely used in connectors, spring materials, etc.

電気伝導性の良い銅に、少量の種々の元素を添加すると
強度は増すが、！気体導性が著しく低下する。！気体導
性が改善された合金の１つに、析出硬化型の銅合金が近
来注目されている。Adding small amounts of various elements to copper, which has good electrical conductivity, increases its strength, but! Gas conductivity is significantly reduced. ! Precipitation hardening copper alloys have recently attracted attention as one of the alloys with improved gas conductivity.

ａ４〜４．Ｏｖｔ＊のＭｌおよびａ１〜１．０Ｗｔ−の
８１を含有する銅基合金ならびに、さらに副成分として
、　　Ｐ、Ｓｎ、Ａｓ＊Ｏｒ、Ｍｇ、Ｍｎ、Ｓｂ、！Ｆ
ｅ＋Ｏｏ＋ＡＩＴＬＺｒ＋Ｂｅ＋Ｚｎからなる群よシ選
択された１種以上を総量で１００１〜２．Ｏｗｔ＄を含
有する前記銅基台金のコルソン合金は１強度と電気伝導
性のバランスのとれた合金である。a4~4. A copper-based alloy containing Ml of Ovt* and 81 of a1 to 1.0Wt-, and further subcomponents such as P, Sn, As*Or, Mg, Mn, Sb,! F
The total amount of one or more selected from the group consisting of e+Oo+AITLZr+Be+Zn is 1001 to 2. The copper-based Corson alloy containing Owt$ is an alloy with a good balance of strength and electrical conductivity.

従来、析出硬化型の銅合金の製造方法は、鋳造したイン
ゴットを７００〜１０００℃の温度で加熱保持し、溶体
化処理を行った後、熱間圧延を行う。しかし、熱間圧延
を行うことは、以下のデメリットがある。Conventionally, in a method for producing a precipitation hardening copper alloy, a cast ingot is heated and held at a temperature of 700 to 1000°C, subjected to solution treatment, and then hot rolled. However, hot rolling has the following disadvantages.

（イ）材料表面に酸化スケールが付き、スケールを除く
ために面側が必要となシ１歩留が大きく低下する。(a) Oxide scale is attached to the surface of the material, and the surface side is required to remove the scale.1 Yield is greatly reduced.

←）　コルソン合金は熱間加工性が悪いため、熱圧割れ
を起こし易い。←) Corson alloy has poor hot workability and is prone to thermal pressure cracking.

（ハ）大気中で加熱されるため、Ｓｉ等活性な添加元素
が内部酸化され、圧延、熱処理、酸洗等を繰り返すと、
この酸化物が表面に現われ。(c) Because it is heated in the atmosphere, active additive elements such as Si are internally oxidized, and when rolling, heat treatment, pickling, etc. are repeated,
This oxide appears on the surface.

欠陥となる。It becomes a defect.

に）　熱間圧延を行うインゴットを加熱保持するために
、膨大なエネルギーを必要とする。) It requires a huge amount of energy to heat and maintain the ingot that is hot rolled.

これらの点から、熱間圧延を行わない析出硬化型銅合金
の製造方法が望、１れている。From these points of view, a method for producing precipitation hardening copper alloys that does not involve hot rolling is desired.

本発明は、析出硬化型の高力高導電性銅基合金の熱間圧
延を行わない製造方法に関するものである。The present invention relates to a method for manufacturing a precipitation hardening type high-strength, high-conductivity copper-based alloy without hot rolling.

Ｎｉ量が０．４〜４．Ｏｗｔｌである理由は、　Ｎｉが
ａ４ｗｔ−未満では、　Ｓｉをα１　ｗｔ優以上添加し
ても高強度でかつ高導電性を示す合金が得られず、逆に
４．０　Ｗｔチを超えると加工性の低下が著しく。The amount of Ni is 0.4 to 4. The reason for this is that if Ni is less than a4wt-, even if Si is added to α1wt or more, an alloy with high strength and high conductivity cannot be obtained, and on the other hand, if it exceeds 4.0wt-, workability becomes markedly decreased.

はんだ付は性も低下するためである。８１蓋を１１〜１
．０Ｗｔチとする理由は、８１量がａ　１　ｗｔ優以下
では、　Ｎｉをα４　ｗｔ％以上添加しても高強度でか
つ高導電性を示す合金が得られず、　１９ｉ量が１、０
　’ｗｔ％を超えると加工性、導電性の低下が著しくな
り、はんだ付は性も低下するためである。This is because soldering also reduces performance. 81 lid 11~1
．． The reason for setting 0Wt is that if the 81 amount is less than a 1 wt, an alloy with high strength and high conductivity cannot be obtained even if Ni is added in an amount of α4 wt% or more.
This is because if it exceeds 'wt%, workability and conductivity will be significantly reduced, and soldering properties will also be reduced.

さらに副成分として。Furthermore, as a sub-ingredient.

Ｐ　　：　　０．　　ＯＯ１〜ＣＬ　　１　５　　ｗｔ
優８ｎ：０．Ｏｌ　　〜　ｉ、５ｗｔｅｓ八Ｓ　；へα
　００１〜　（１１ＷｔチＣｒ　：　α　ＯＯ１〜１．
　　ＯｗｔｍＭｇ　；　α０　１　〜ｉ、　０ｗｔ％Ｍ
ｎ　　：　　ＣＬ　　Ｏ１〜１．　　Ｏｖｔ１日ｂ　：
　α　０　０　１　〜Ｇ、　　１　　ｗｔ＊Ｐａ　　：
　　（１０１〜１．　　ＯｗｔｌＣｏ　；　α　０　１
　〜１．　　Ｏｖｒｔ＊Ａｌ、　　：　　０．　　Ｏ１
〜１．　　０ｗｔ％Ｔ１　：　α　０　１　〜１．　　
ＯｗｔｌＺｒ　　；　　ｌ　　０　１　〜ｔ　　Ｏｗｔ
ｌＢｅ　　：　　０．　　Ｏ１〜１．　　ＯｗｔｌＺｎ
　　：　　０．　　０　１　〜１．　　Ｏｗｔｌからな
る群よシ選択された１８１以上を総量でα００１〜２．
　Ｏｗｔ％添加した組成を有する銅基合金は、１１Ｉｔ
子部品として最適な強度と良好な耐食性が得られるが、
その総髪が１１００１　ｗｔチ未満では、高強度でかつ
良好な耐食性を有する合金は得られず、２．Ｏｗｔ−を
超えると導電性が低下し、はんだ付は性が劣化するため
である。P: 0. OO1~CL 1 5 wt
Good 8n: 0. Ol ~ i, 5wtes 8S; to α
001~(11Wt Cr: αOO1~1.
OwtmMg; α0 1 ~i, 0wt%M
n: CL O1-1. Ovt1 day b:
α 0 0 1 ~G, 1 wt*Pa:
(101~1. OwtlCo; α 0 1
~1. Ovrt*Al, : 0. O1
~1. 0wt%T1: α 0 1 ~1.
OwtlZr ; l 0 1 ~t Owt
lBe: 0. O1~1. OwtlZn
: 0. 0 1 ~ 1. The total amount of 181 or more selected from the group consisting of Owtl is α001~2.
The copper-based alloy having a composition with Owt% addition of 11It
Optimal strength and good corrosion resistance can be obtained as child parts, but
If the total hair is less than 11001 wt, an alloy with high strength and good corrosion resistance cannot be obtained; 2. This is because if it exceeds Owt-, the conductivity decreases and the soldering properties deteriorate.

鋳造したインゴットは、熱間圧延ではなく。Cast ingots are not hot rolled.

直接冷間圧延を行う。加工度を４０〜９５チとする理由
は、４０嘩未満の加工度では１次の熱処理によ）、高強
度かつ高導電性の材料が得られな（，９５％を超える加
工度では、材料の形状が悪くなるためである。Perform direct cold rolling. The reason why the working degree is set to 40 to 95% is that if the working degree is less than 40%, it will not be possible to obtain a material with high strength and high conductivity (by the primary heat treatment), and if the working degree is less than 95%, the material will not be able to be obtained. This is because the shape of the

との冷間圧延した材料を還元性または不活性雰囲気にお
いて、材料温度が３５０〜７００℃で３０秒〜１０時間
熱処理を行う。熱処理温度を３５０〜７００℃とする理
由は、３５０℃以下では、３０秒以上熱処理しても、析
出硬化型銅合金の特徴である。高強度、高導性でかつ伸
びのある材料が得られず、７００℃を超える温度では材
料が溶体化され、冷却後は過飽和固溶体となシ、高強度
、高導電性の材料が得られない。また、熱処理時間ｔ−
３０秒〜１０時間とする理由は、３０秒未満では、熱処
理の効果が認められず、１０時間を超えても導電性に変
化はなく、それ以上の熱処理は無駄なためである。The cold-rolled material is heat treated in a reducing or inert atmosphere at a material temperature of 350 to 700°C for 30 seconds to 10 hours. The reason for setting the heat treatment temperature to 350 to 700°C is that precipitation hardening copper alloys can be heat treated for 30 seconds or more at temperatures below 350°C. A material with high strength, high conductivity, and elongation cannot be obtained; the material becomes a solution at temperatures exceeding 700°C and becomes a supersaturated solid solution after cooling; a material with high strength and high conductivity cannot be obtained. . Also, the heat treatment time t-
The reason for setting the heat treatment time to 30 seconds to 10 hours is that if the heat treatment is less than 30 seconds, the effect of the heat treatment will not be recognized, and even if it exceeds 10 hours, there will be no change in conductivity, and further heat treatment is wasteful.

熱処理を還元性または不活性雰囲気で行う理由は、材料
の表面および内部酸化を防ぐためである。The reason why the heat treatment is performed in a reducing or inert atmosphere is to prevent surface and internal oxidation of the material.

以上の製造工程に加えて、必要に応じて適宜冷間加工と
熱処理を行なうことにより、様々な板厚や硬さ、伸びの
材料を得ることができる。In addition to the above manufacturing process, materials with various thicknesses, hardnesses, and elongations can be obtained by appropriately performing cold working and heat treatment as necessary.

実施例 第１表に示される本発明合金に係る各種成分組成のイン
ゴットを連続鋳造装置により鋳造した（板厚１５　ｗｍ
　）。このインゴットを７０−の加工度で冷間圧延し、
その後Ｎ、雰囲気において５００℃で５時間加熱した。Examples Ingots having various compositions of the alloy of the present invention shown in Table 1 were cast using a continuous casting machine (thickness: 15 wm).
). This ingot was cold rolled at a working degree of 70-
Thereafter, it was heated at 500° C. for 5 hours in a nitrogen atmosphere.

このときの硬さ。Hardness at this time.

伸び、導電率を測定した。結果を比較合金とともに第１
表に示す。Elongation and conductivity were measured. The results are shown in the first column along with comparative alloys.
Shown in the table.

第２表に第１表中６の成分の連続鋳造装置によシ鋳造し
た板厚１５鵡のインゴットを各加工度で冷間圧延した後
ｒ　４雰囲気において材料温度で５００℃で５時間加熱
したときの硬さ、導を率、伸びを第２表に示す。また第
２表にて用いたインゴットを板厚２藺まで冷間圧延しく
加工度８７％）、その材料をＮ、雰囲気にて各温度。Table 2 shows that ingots with a thickness of 15 mm were cast using a continuous casting machine using the components listed in Table 1, and were cold-rolled at various working degrees, and then heated at a material temperature of 500°C for 5 hours in an atmosphere of R4. The hardness, conductivity and elongation are shown in Table 2. In addition, the ingots used in Table 2 were cold-rolled to a plate thickness of 2 mm (working degree: 87%), the material was N, and the temperature was various in the atmosphere.

時間で熱処理した。その時の硬さ、伸び、導電率を第５
表に示す。Heat treated for an hour. The hardness, elongation, and conductivity at that time were determined as
Shown in the table.

第　　１　　表 １）ＩＪ・１ 第　　２　　表 第　　３　　表 第１表〜第３表から１本発明に係る合金の製造方法によ
シ、すぐれた強度、伸び、導電性を兼ね具える合金が安
価に得られることがわかる。Table 1 1) IJ・1 Table 2 Table 3 1 From Tables 1 to 3 The method of manufacturing the alloy according to the present invention allows the alloy to have excellent strength, elongation, and conductivity at low cost. You can see that it can be obtained.

Claims (4)

【特許請求の範囲】[Claims] （１）（Ａ）連続鋳造により０．４〜４．０ｗｔ％のＮ
ｉ、０．１〜１．０ｗｔ％のＳｉを含み、残部Ｃｕおよ
び不可避的な不純物からなる銅基合金インゴット を製造する工程 （Ｂ）上記インゴットを４０〜９５％の加工度で冷間圧
延する工程 （Ｃ）上記冷間圧延した材料を還元性または不活性雰囲
気において、材料温度が３５０〜 ７００℃で、３０秒〜１０時間熱処理する 工程 からなり、熱間圧延を行わない高力高導電性銅基合金の
製造方法。(1) (A) 0.4 to 4.0 wt% N by continuous casting
i. Step of manufacturing a copper-based alloy ingot containing 0.1 to 1.0 wt% of Si and the balance being Cu and unavoidable impurities. (B) Cold rolling the above ingot at a working degree of 40 to 95%. Step (C) The above-mentioned cold-rolled material is heat-treated in a reducing or inert atmosphere at a material temperature of 350 to 700°C for 30 seconds to 10 hours, resulting in high strength and high conductivity without hot rolling. A method for producing copper-based alloys. （２）必要に応じ前記熱処理の後、冷間加工と熱処理を
行うことを特徴とする特許請求の範囲第１項記載の高力
高導電性銅基合金の製造方法。(2) The method for producing a high-strength, high-conductivity copper-based alloy according to claim 1, characterized in that, if necessary, cold working and heat treatment are performed after the heat treatment. （３）（Ａ）連続鋳造により０．４〜４．０ｗｔ％のＮ
ｉ、０．１〜１．０ｗｔ％のＳｉ、副成分として、 Ｐ；０．００１〜０．１５ｗｔ％ Ｓｎ；０．０１〜１．５ｗｔ％ Ａｓ；０．００１〜０．１ｗｔ％ Ｃｒ；０．００１〜１．０ｗｔ％ Ｍｇ；０．０１〜１．０ｗｔ％ Ｍｎ；０．０１〜１．０ｗｔ％ Ｓｂ；０．００１〜０．１ｗｔ％ Ｆｅ；０．０１〜１．０ｗｔ％ Ｃｏ；０．０１〜１．０ｗｔ％ Ａｌ；０．０１〜１．０ｗｔ％ Ｔｉ；０．０１〜１．０ｗｔ％ Ｚｒ；０．０１〜１．０ｗｔ％ Ｂｅ；０．０１〜１．０ｗｔ％ Ｚｎ；０．０１〜１．０ｗｔ％ からなる群より選択された１種以上を総量で０．００１
〜２０ｗｔ％、残部Ｃｕおよび不可避的な不純物からな
る銅基合金インゴットを製造する工程 （Ｂ）上記インゴットを４０〜９５％の加工度で冷間圧
延する工程 （Ｃ）上記合金を還元性または不活性雰囲気において、
材料温度が３５０〜７００℃で、 ３０秒〜１０時間熱処理する工程 からなり、熱間圧延を行わない高力高導電性銅基合金の
製造方法。(3) (A) 0.4 to 4.0 wt% N by continuous casting
i, 0.1-1.0 wt% Si, as subcomponents: P; 0.001-0.15 wt% Sn; 0.01-1.5 wt% As; 0.001-0.1 wt% Cr; 0 .001-1.0wt% Mg; 0.01-1.0wt% Mn; 0.01-1.0wt% Sb; 0.001-0.1wt% Fe; 0.01-1.0wt% Co; 0 .01-1.0wt% Al; 0.01-1.0wt% Ti; 0.01-1.0wt% Zr; 0.01-1.0wt% Be; 0.01-1.0wt% Zn; 0 One or more selected from the group consisting of .01 to 1.0 wt% in a total amount of 0.001
Step of manufacturing a copper-based alloy ingot consisting of ~20 wt%, balance Cu and unavoidable impurities (B) Step of cold rolling the above ingot at a workability of 40 to 95% (C) Step of rolling the above alloy with reducible or non-reducible In an active atmosphere,
A method for producing a high-strength, high-conductivity copper-based alloy, which comprises a step of heat-treating the material at a temperature of 350 to 700°C for 30 seconds to 10 hours, without hot rolling. （４）必要に応じ前記熱処理の後、冷間加工と熱処理を
行うことを特徴とする特許請求の範囲第３項記載の高力
高導電性銅基合金の製造方法。(4) The method for producing a high-strength, high-conductivity copper-based alloy according to claim 3, wherein cold working and heat treatment are performed after the heat treatment, if necessary.