JP2003119527A - Lead-free copper alloy for sliding part - Google Patents

Lead-free copper alloy for sliding part

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Publication number
JP2003119527A
JP2003119527A JP2001314994A JP2001314994A JP2003119527A JP 2003119527 A JP2003119527 A JP 2003119527A JP 2001314994 A JP2001314994 A JP 2001314994A JP 2001314994 A JP2001314994 A JP 2001314994A JP 2003119527 A JP2003119527 A JP 2003119527A
Authority
JP
Japan
Prior art keywords
less
alloy
lead
copper alloy
seizure resistance
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.)
Pending
Application number
JP2001314994A
Other languages
Japanese (ja)
Inventor
Kunio Nakajima
邦夫 中島
Riyouichi Ishikane
良一 石金
Wataru Yago
亘 矢後
Kenichi Ichida
賢一 市田
Kazuo Takeuchi
和夫 竹内
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chuetsu Metal Works Co Ltd
Original Assignee
Chuetsu Metal Works Co Ltd
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Filing date
Publication date
Application filed by Chuetsu Metal Works Co Ltd filed Critical Chuetsu Metal Works Co Ltd
Priority to JP2001314994A priority Critical patent/JP2003119527A/en
Publication of JP2003119527A publication Critical patent/JP2003119527A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide a lead-free copper alloy for a sliding part, which can cope with unleadding, secures machinability and seizure resistance, and further improves even abrasion resistance. SOLUTION: The lead-free copper alloy for the sliding part superior in seizure resistance comprises, by wt.% 20-45% Zn, 0.1-4% Bi, 0.1-6% Mn, and the balance Cu with impurities. The copper alloy has superior seizure resistance and abrasion resistance compared to a Cu-Zn-based alloy (an equivalent material to CAC202) and Cu-Zn-Pb-based alloy (an equivalent material to CuZn40Pb2 in a DIN Standard), which are conventionally used as materials for sliding parts. It can cope with unleadding because of containing no Pb. Furthermore, it has superior seizure resistance and abrasion resistance to a Sn added lead-free free-cutting brass alloy (an alloy in the invention of Japanese patent) publication number 07-310133 which the present applicant previously developed.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、耐焼付性及び耐摩
耗性に優れた摺動部用無鉛銅合金に係わる。主たる使用
用途としては、油圧ユニットに組み込まれるシリンダー
ブロックやピストンシュー、バルブプレート、オートマ
チックトランスミッション用ベアリングやプレート、カ
ーエアコン用斜板等がある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lead-free copper alloy for sliding parts which has excellent seizure resistance and wear resistance. Main applications include cylinder blocks and piston shoes incorporated in hydraulic units, valve plates, bearings and plates for automatic transmissions, and swash plates for car air conditioners.

【０００２】[0002]

【従来の技術】現在、摺動部用材料として、Ｃｕ-Ｚｎ
系（ＣＡＣ２０２〜２０３）、Ｃｕ−Ｚｎ−Ｐｂ系（Ｄ
ＩＮ規格材 ＣｕＺｎ４０Ｐｂ２等）が使用されてお
り、被削性が良く、耐焼付性が良いとされている。2. Description of the Related Art Currently, Cu-Zn is used as a material for sliding parts.
System (CAC202-203), Cu-Zn-Pb system (D
IN standard material such as CuZn40Pb2) is used, and it is said that it has good machinability and good seizure resistance.

【発明が解決しようとする課題】[Problems to be Solved by the Invention]

【０００３】しかしながら、近年、Ｐｂの有毒性が問わ
れており、環境問題及び人体に及ぼす影響が懸念されて
いる中、Ｐｂの使用規制が厳しくなっている。前述のＣ
ｕ−Ｚｎ系（ＣＡＣ２０２〜２０３）、Ｃｕ−Ｚｎ−Ｐ
ｂ系（ＤＩＮ規格材 ＣｕＺｎ４０Ｐｂ２等）の材料
は、Ｐｂを含有しているため無鉛化への対応が困難であ
る。However, in recent years, the toxicity of Pb has been questioned, and there are concerns about environmental problems and effects on the human body. C mentioned above
u-Zn system (CAC202-203), Cu-Zn-P
Since b-based materials (DIN standard material CuZn40Pb2 etc.) contain Pb, it is difficult to deal with lead-free.

【０００４】また、油圧機器及びミッションの高性能化
や、カーエアコンの高回転化などにより、従来の摺動部
用材料では、耐摩耗性が不足してきている。Further, due to the high performance of hydraulic equipment and missions and the high rotation speed of car air conditioners, the conventional sliding part materials are becoming insufficient in wear resistance.

【０００５】一方、本願出願人は、先に、無鉛快削黄銅
合金として、特願平６−１２３２１３号（特開平７−３
１０１３３号）合金を開発したが、この合金で必須とし
て添加されるＳｎ元素は、摺動部材としても適応される
が、主に脱亜鉛腐食を防止することを目的としており、
上記した高性能化や高回転化の摺動部の摺動用材料とし
ては満足し得ないものであった。On the other hand, the applicant of the present invention has previously proposed, as a lead-free free-cutting brass alloy, Japanese Patent Application No. 6-123213 (Japanese Patent Application Laid-Open No. 7-313).
No. 10133) alloy was developed. The Sn element, which is added as an essential element in this alloy, is also applied as a sliding member, but its main purpose is to prevent dezincification corrosion.
It was not satisfactory as a sliding material for the above-mentioned sliding parts having high performance and high rotation.

【０００６】本発明は、上記の実情に鑑み開発されたも
ので、無鉛化への対応が可能であり、被削性と耐焼付性
を確保し、さらに、耐摩耗性をも向上させた摺動部用無
鉛銅合金を提供することを目的としている。The present invention was developed in view of the above-mentioned circumstances, and is capable of dealing with lead-free, ensuring machinability and seizure resistance, and further improving abrasion resistance. It is intended to provide a lead-free copper alloy for moving parts.

【０００７】[0007]

【課題を解決するための手段】上記の目的を達成するた
めに、本発明は、重量％で、Ｚｎ：２０〜４５％、Ｂ
ｉ：０．１〜４％、Ｍｎ：０.１〜６％を含有し、残部
がＣｕ及び不純物よりなる耐焼付性に優れた摺動部用無
鉛銅合金を構成した。In order to achieve the above object, the present invention provides Zn: 20 to 45% by weight, B:
A lead-free copper alloy for a sliding part, which contains i: 0.1 to 4% and Mn: 0.1 to 6%, and the balance of which is Cu and impurities and which is excellent in seizure resistance.

【０００８】また、重量％で、（ａ）Ｚｎ：２０〜４５
％、Ｂｉ：０．１〜４％、Ｍｎ：０.１〜６％を含有
し、更に、（ｂ）Ｎｉ：４％以下，Ｓｉ：３％以下，Ａ
ｌ：６％以下，Ｓｂ：１％以下よりなる群から選ばれる
少なくとも１種以上の元素を含有し、残部がＣｕ及び不
純物よりなる耐焼付性に優れた摺動部用無鉛銅合金をも
構成した。Further, in weight%, (a) Zn: 20 to 45
%, Bi: 0.1 to 4%, Mn: 0.1 to 6%, and (b) Ni: 4% or less, Si: 3% or less, A
l: 6% or less, Sb: at least one element selected from the group consisting of 1% or less, and the balance also comprises a lead-free copper alloy for sliding parts which is excellent in seizure resistance and is composed of Cu and impurities did.

【０００９】さらに、重量％で、（ａ）Ｚｎ：２０〜４
５％、Ｂｉ：０．１〜４％、Ｍｎ：０.１〜６％を含有
し、更に、（ｂ）Ｎｉ：４％以下，Ｓｉ：３％以下，Ａ
ｌ：６％以下，Ｓｂ：１％以下よりなる群から選ばれる
少なくとも１種以上の元素と、（ｃ）Ｆｅ：３％以下，
Ｃｏ：３％以下，Ｔｉ：３％以下，Ｍｏ：１％以下，Ｃ
ｒ：１％以下，Ｚｒ：２％以下，Ｎｂ：１％以下，Ｖ：
１％以下よりなる群から選ばれる少なくとも１種以上の
元素とを含有し、残部がＣｕ及び不純物よりなる耐焼付
性及び耐摩耗性に優れた摺動部用無鉛銅合金をも構成し
た。Further, in weight%, (a) Zn: 20 to 4
5%, Bi: 0.1 to 4%, Mn: 0.1 to 6%, and (b) Ni: 4% or less, Si: 3% or less, A
l: 6% or less, Sb: at least one element selected from the group consisting of 1% or less, and (c) Fe: 3% or less,
Co: 3% or less, Ti: 3% or less, Mo: 1% or less, C
r: 1% or less, Zr: 2% or less, Nb: 1% or less, V:
A lead-free copper alloy for a sliding part, which contains at least one element selected from the group consisting of 1% or less and whose balance is Cu and impurities and which is excellent in seizure resistance and wear resistance, was also formed.

【００１０】[0010]

【発明の実施の形態】次に、本発明合金の構成成分につ
いて、その作用と含有量の限定理由について説明する。BEST MODE FOR CARRYING OUT THE INVENTION Next, with respect to the constituent components of the alloy of the present invention, the action and the reason for limiting the content will be described.

【００１１】１．Ｚｎ Ｚｎは、マトリックスに固溶して材料の強度を向上させ
るので、最低２０ｗｔ％必要である。しかし、４５ｗｔ
％を超えると脆弱なγ相が析出してくる。またＺｎは蒸
気圧が高いため、溶解時の酸化やガス吸収を防止する。1. Zn Zn is required as a minimum of 20 wt% because it forms a solid solution in the matrix to improve the strength of the material. However, 45 wt
If it exceeds%, a brittle γ phase will precipitate. Since Zn has a high vapor pressure, it prevents oxidation and gas absorption during dissolution.

【００１２】２．Ｂｉ Ｂｉの添加は、本発明合金の被削性及び耐焼付性を左右
する。Ｐｂと基本特性が類似しているＢｉは、低融点元
素のため、摺動による発熱に対し、優れた自己潤滑性を
発揮し、焼付を防止する。また、合金のマトリックスに
ほとんど固溶せず粒状に点在しており、切削時に合金素
地がＢｉ粒子で剪断されるため、切粉が細かく切削性が
改善される。2. The addition of Bi Bi affects the machinability and seizure resistance of the alloy of the present invention. Bi, which has similar basic characteristics to Pb, is a low melting point element, and therefore exhibits excellent self-lubricating property against heat generated by sliding and prevents seizure. Further, the alloy matrix is hardly solid-solved and is scattered in a granular form, and the alloy base is sheared by the Bi particles during cutting, so that the chips are fine and the machinability is improved.

【００１３】３．Ｍｎ Ｍｎは、溶湯内の酸素を除去（脱酸）し、湯流れ及び溶
湯の品位を向上させると共に、延性を改善する。合金中
のＭｎは、マトリックスに均一に晶出し、合金の耐摩耗
性を改善させる。さらに、（ｂ）Ｎｉ，Ｓｉ，Ａｌ，Ｓ
ｂ群、及び（ｃ）Ｆｅ，Ｃｏ，Ｔｉ，Ｍｏ，Ｃｒ，Ｚ
ｒ，Ｎｂ，Ｖ群からなる元素と全量または一部が結合
し、金属間化合物を形成し、耐摩耗性を大幅に改善す
る。3. Mn Mn removes oxygen (deoxidizes) in the molten metal, improves the molten metal flow and the quality of the molten metal, and improves the ductility. Mn in the alloy crystallizes uniformly in the matrix and improves the wear resistance of the alloy. Further, (b) Ni, Si, Al, S
b group, and (c) Fe, Co, Ti, Mo, Cr, Z
All or part of the elements consisting of r, Nb, and V groups are combined to form an intermetallic compound, which greatly improves wear resistance.

【００１４】４．（ｂ）Ｎｉ，Ｓｉ，Ａｌ群 （ｂ）Ｎｉ，Ｓｉ，Ａｌ群の添加は、マトリックスを強
化すると共に、Ｍｎまたは（ｃ）Ｆｅ，Ｃｏ，Ｔｉ，Ｍ
ｏ，Ｃｒ，Ｚｒ，Ｎｂ，Ｖ群と結合して、硬い金属間化
合物を生成し、耐摩耗性，耐焼付性を向上させる。添加
量が所定量より多いとハードスポットを生成し、被削性
や摩耗特性を損なう。4. (B) Ni, Si, Al group (b) Addition of Ni, Si, Al group strengthens the matrix and (M) or (c) Fe, Co, Ti, M
Combines with the O, Cr, Zr, Nb, and V groups to form a hard intermetallic compound and improve wear resistance and seizure resistance. If the added amount is more than the predetermined amount, hard spots are generated and machinability and wear characteristics are impaired.

【００１５】５．（ｃ）Ｆｅ，Ｃｏ，Ｔｉ，Ｍｏ，Ｃ
ｒ，Ｚｒ，Ｎｂ，Ｖ群 （ｃ）Ｆｅ，Ｃｏ，Ｔｉ，Ｍｏ，Ｃｒ，Ｚｒ，Ｎｂ，Ｖ
群の添加は、結晶粒を微細化し、伸びを改善すると共
に、Ｍｎまたは（ｂ）Ｎｉ，Ｓｉ，Ａｌ群と結合して、
硬い金属間化合物を生成し、耐摩耗性を向上させる。添
加量が所定量より多いとハードスポットを生成し、被削
性や摩耗特性を損なう。5. (C) Fe, Co, Ti, Mo, C
r, Zr, Nb, V group (c) Fe, Co, Ti, Mo, Cr, Zr, Nb, V
The addition of the group refines the crystal grains and improves the elongation, and at the same time, combines with Mn or (b) Ni, Si, and Al groups,
Produces a hard intermetallic compound and improves wear resistance. If the added amount is more than the predetermined amount, hard spots are generated and machinability and wear characteristics are impaired.

【００１６】６．Ｓｂ Ｓｂは、Ｂｉと共に被削性と耐焼付性を向上させるが、
１％を超えると靱性を損なう。6. Sb Sb improves machinability and seizure resistance together with Bi,
If it exceeds 1%, the toughness is impaired.

【００１７】[0017]

【実施例】（１）供試材 本発明実施例材料を表１に示し、比較例材料を表２に示
した。この表１及び表２に示したＮｏ．１〜Ｎｏ．１
０、及びＮｏ．Ａ〜Ｎｏ．Ｃの成分からなる合金を、高
周波誘導炉にて溶製した。その合金を、φ５５×１００
Ｌ金型、及びＪＩＳ Ｅ号 供試材に鋳造した。EXAMPLES (1) Test Material Table 1 shows the material of the present invention, and Table 2 shows the material of the comparative example. No. shown in Table 1 and Table 2 1-No. 1
0, and No. A-No. An alloy composed of the component C was melted in a high frequency induction furnace. The alloy is φ55 × 100
It was cast into an L die and JIS E test material.

【表１】 [Table 1]

【表２】 [Table 2]

【００１８】（２）引張試験，硬さ試験 各材質のＪＩＳ Ｅ号 供試材から、ＪＩＳ Ｚ ２２
０１ １４Ａ号引張試験片（硬度片付）を機械加工し、
各試験を行った。その結果を表３に示す。(2) Tensile test and hardness test From JIS E test materials of each material, JIS Z 22
01 Machining No. 14A tensile test piece (with hardness piece),
Each test was conducted. The results are shown in Table 3.

【表３】 [Table 3]

【００１９】（３）摩耗試験 表１及び表２の合金１３種類を、φ５５×１００Ｌ素材
から図１の試験片に加工した。相手材として図２に示す
形状の試験片を用い、スラスト摩耗試験を表４に示す２
種類の評価方法で行い、その結果を表５に示した。(3) Abrasion test Thirteen kinds of alloys shown in Tables 1 and 2 were processed from φ55 × 100L material into test pieces shown in FIG. A test piece having the shape shown in FIG. 2 is used as a mating material, and the thrust wear test is shown in Table 4.
Various types of evaluation methods were used, and the results are shown in Table 5.

【表４】 [Table 4]

【表５】 [Table 5]

【００２０】[0020]

【発明の効果】表５の結果から分かるように、本発明実
施例合金はいずれも、従来の摺動部用材料として使用さ
れているＣｕ−Ｚｎ系（ＣＡＣ２０２相当材）やＣｕ−
Ｚｎ−Ｐｂ系（ＤＩＮ規格 ＣｕＺｎ４０Ｐｂ２相当
材）よりは優れた耐焼付性及び耐摩耗性を有している。
また、Ｐｂを含有していないので、無鉛化への対応が可
能である。しかも、本出願人が先に開発したＳｎ添加無
鉛快削黄銅合金（特開平７−３１０１３３号発明合金）
よりも優れた耐焼付性と耐摩耗性を有している。As can be seen from the results of Table 5, the alloys of the present invention are all Cu--Zn based materials (equivalent to CAC202) and Cu-- which have been used as conventional sliding part materials.
It has better seizure resistance and wear resistance than the Zn-Pb system (DIN standard CuZn40Pb2 equivalent material).
Further, since it does not contain Pb, it is possible to deal with lead-free. Moreover, the Sn-added lead-free free-cutting brass alloy previously developed by the applicant (Japanese Patent Application Laid-Open No. 7-310133)
It has better seizure resistance and wear resistance.

【００２１】従って、本発明合金は、高性能化された油
圧機器やミッション、或いは高回転化されたカーエアコ
ン等の高度な耐摩耗性能が要求される摺動部用材料とし
て使用するのに最適である。Therefore, the alloy of the present invention is most suitable for use as a material for sliding parts that require a high degree of wear resistance in hydraulic equipment and missions with high performance, or car air conditioners with high rotation speed. Is.

【図面の簡単な説明】[Brief description of drawings]

【図１】試験片を説明する図である。FIG. 1 is a diagram illustrating a test piece.

【図２】相手材を説明する図である。FIG. 2 is a diagram illustrating a mating member.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 矢後 亘 富山県中新川郡立山町西芦原新１番地の１ 中越合金鋳工株式会社内 (72)発明者 市田 賢一 富山県中新川郡立山町西芦原新１番地の１ 中越合金鋳工株式会社内 (72)発明者 竹内 和夫 富山県中新川郡立山町西芦原新１番地の１ 中越合金鋳工株式会社内   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Wataru Yago             1 of Nishi-Ashihara New Tateyama Town, Nakashingawa District, Toyama Prefecture               Chuetsu Alloy Casting Co., Ltd. (72) Inventor Kenichi Ichida             1 of Nishi-Ashihara New Tateyama Town, Nakashingawa District, Toyama Prefecture               Chuetsu Alloy Casting Co., Ltd. (72) Inventor Kazuo Takeuchi             1 of Nishi-Ashihara New Tateyama Town, Nakashingawa District, Toyama Prefecture               Chuetsu Alloy Casting Co., Ltd.

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 重量％で、Ｚｎ：２０〜４５％、Ｂｉ：
０．１〜４％、Ｍｎ：０.１〜６％を含有し、残部がＣ
ｕ及び不純物よりなる耐焼付性に優れた摺動部用無鉛銅
合金。1. By weight percent, Zn: 20-45%, Bi:
0.1 to 4%, Mn: 0.1 to 6%, balance C
Lead-free copper alloy for sliding parts, which is made of u and impurities and has excellent seizure resistance. 【請求項２】 重量％で、（ａ）Ｚｎ：２０〜４５％、
Ｂｉ：０．１〜４％、Ｍｎ：０.１〜６％を含有し、更
に、（ｂ）Ｎｉ：４％以下，Ｓｉ：３％以下，Ａｌ：６
％以下，Ｓｂ：１％以下よりなる群から選ばれる少なく
とも１種以上の元素を含有し、残部がＣｕ及び不純物よ
りなる耐焼付性に優れた摺動部用無鉛銅合金。2. A weight ratio of (a) Zn: 20 to 45%,
Bi: 0.1 to 4%, Mn: 0.1 to 6%, and (b) Ni: 4% or less, Si: 3% or less, Al: 6
%, Sb: 1% or less, and at least one element selected from the group consisting of Cu and impurities, the balance being Cu and impurities, which is excellent in seizure resistance. 【請求項３】 重量％で、（ａ）Ｚｎ：２０〜４５％、
Ｂｉ：０．１〜４％、Ｍｎ：０.１〜６％を含有し、更
に、（ｂ）Ｎｉ：４％以下，Ｓｉ：３％以下，Ａｌ：６
％以下，Ｓｂ：１％以下よりなる群から選ばれる少なく
とも１種以上の元素と、（ｃ）Ｆｅ：３％以下，Ｃｏ：
３％以下，Ｔｉ：３％以下，Ｍｏ：１％以下，Ｃｒ：１
％以下，Ｚｒ：２％以下，Ｎｂ：１％以下，Ｖ：１％以
下よりなる群から選ばれる少なくとも１種以上の元素と
を含有し、残部がＣｕ及び不純物よりなる耐焼付性及び
耐摩耗性に優れた摺動部用無鉛銅合金。3. A weight percentage of (a) Zn: 20-45%,
Bi: 0.1 to 4%, Mn: 0.1 to 6%, and (b) Ni: 4% or less, Si: 3% or less, Al: 6
% Or less, Sb: at least one element selected from the group consisting of 1% or less, and (c) Fe: 3% or less, Co:
3% or less, Ti: 3% or less, Mo: 1% or less, Cr: 1
% Or less, Zr: 2% or less, Nb: 1% or less, V: 1% or less, and at least one element selected from the group consisting of Cu and impurities, the balance being seizure resistance and wear resistance. Lead-free copper alloy with excellent properties for sliding parts.
JP2001314994A 2001-10-12 2001-10-12 Lead-free copper alloy for sliding part Pending JP2003119527A (en)

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