JPH07107183B2 - Wear resistant Cu alloy with high strength and toughness - Google Patents
Wear resistant Cu alloy with high strength and toughnessInfo
- Publication number
- JPH07107183B2 JPH07107183B2 JP21067587A JP21067587A JPH07107183B2 JP H07107183 B2 JPH07107183 B2 JP H07107183B2 JP 21067587 A JP21067587 A JP 21067587A JP 21067587 A JP21067587 A JP 21067587A JP H07107183 B2 JPH07107183 B2 JP H07107183B2
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Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、高強度と高靭性を有し、さらに耐摩耗性に
すぐれ、さらに摩擦係数で評価される相手部材に対する
同期特性にもすぐれ、したがってこれらの特性が要求さ
れる自動車のトランスミッション構造部材や変速機のシ
ンクロナイザリングなどの製造に用いるのに適したCu合
金に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention has high strength and high toughness, further has excellent wear resistance, and further has excellent synchronization characteristics with respect to a mating member evaluated by a friction coefficient, Accordingly, the present invention relates to a Cu alloy suitable for use in the production of automobile transmission structural members and transmission synchronizer rings, which require these characteristics.
従来、一般に、上記の自動車のトランスミッション構造
部材や変速機のシンクロナイザリングなどの製造には、
強度および靭性、耐摩耗性、さらに高い摩擦係数が要求
されることから、これらの特性を具備したアルミニウム
青銅や高力黄銅などのCu合金が用いられている。Conventionally, in general, in the manufacture of the above-mentioned automobile transmission structural member and the synchronizer ring of the transmission,
Since strength, toughness, wear resistance, and high friction coefficient are required, Cu alloys such as aluminum bronze and high-strength brass are used.
しかし、近年、上記各種機器の小型化および軽量化、並
びに高出力化に伴い、これらを構成する部材はより一段
とすぐれた強度、靭性、および耐摩耗性、さらに高い摩
擦係数を具備することが要求されるようになっている
が、上記のアルミニウム青銅や高力黄銅などの従来Cu合
金では、これらの要求を十分満足させることができない
のが現状である。However, in recent years, with the miniaturization and weight reduction of the above-mentioned various devices and the increase in output, it is required that the members constituting these have further excellent strength, toughness, and wear resistance, and a higher friction coefficient. However, the conventional Cu alloys such as the above-mentioned aluminum bronze and high-strength brass cannot satisfy these requirements at present.
そこで、本発明者等は、上述のような観点から、上記各
種機器の小型化および軽量化、さらに高出力化に対応で
きる構造部材用材料を開発すべく研究を行なった結果、
重量％で（以下％は重量％を示す）、 Zn:17〜40％、Al:2〜11％、 Mn:0.5〜６％、Si:0.1〜２％、 Fe,Ni,およびCoのうちの１種または２種以上:0.1〜３
％、 P,Mg,およびCaのうちの１種または２種以上:0.003〜0.3
％、 酸素:30〜1000ppm、 を含有し、さらに必要に応じて、 Cr:0.05〜１％と、 PbおよびSnのうちの１種または２種:0.05〜２％、 のうちのいずれか、または両方を含有し、残りがCuと不
可避不純物からなる組成、並びに素地中に金属間化合物
と酸化物が均一分散した組織を有するCu合金は、高強度
と高靭性、さらにすぐれた耐摩耗性を有し、かつ摩擦係
数も高く、したがってこのCu合金をトランスミッション
構造部材やシンクロナイザリングなどの製造に用いた場
合に、これら部材で構成される各種機器の小型化および
軽量化が可能となり、かつ高性能化をはかることができ
るようになるという知見を得たのである。Therefore, the present inventors, from the above viewpoints, as a result of research to develop a material for structural members that can correspond to miniaturization and weight reduction of the above various devices, and further high output,
In% by weight (hereinafter% indicates% by weight), Zn: 17-40%, Al: 2-11%, Mn: 0.5-6%, Si: 0.1-2%, Fe, Ni, and Co 1 type or 2 or more types: 0.1 to 3
%, P, Mg, and one or more of Ca: 0.003 to 0.3
%, Oxygen: 30 to 1000 ppm, and, if necessary, Cr: 0.05 to 1% and one or two of Pb and Sn: 0.05 to 2%, or A Cu alloy containing both of them, with the balance consisting of Cu and unavoidable impurities, and a structure in which intermetallic compounds and oxides are uniformly dispersed in the base material, has high strength and high toughness as well as excellent wear resistance. In addition, the friction coefficient is also high, so when this Cu alloy is used in the manufacture of transmission structural members and synchronizer rings, it is possible to reduce the size and weight of various devices made of these members, and to improve their performance. I have obtained the knowledge that I will be able to measure.
この発明は、上記知見にもとづいてなされたものであっ
て、以下に成分組成を上記の通りに限定した理由を説明
する。The present invention has been made based on the above findings, and the reason why the component composition is limited as described above will be described below.
（ａ） ZnおよびAl これらの成分には、共存した状態で合金の強度および靭
性を向上させるほか、Al成分にはSi成分と共に、素地中
に均一に微細分散する複酸化物を形成して、耐焼き付き
性の向上および摩擦係数の安定性に寄与し、かつ耐摩耗
性を向上させる作用があるが、その含有量がそれぞれZ
n:17％未満およびAl:2％未満では前記作用に所望の効果
を確保することができず、一方その含有量がZn:40％お
よびAl:11％を越えてもより一層の向上効果は現われな
いことから、その含有量をそれぞれZn:17〜40％、Al:2
〜11％と定めた。(A) Zn and Al In addition to improving the strength and toughness of the alloy in the presence of these components, the Al component, together with the Si component, forms a double oxide that is uniformly finely dispersed in the matrix, It contributes to the improvement of seizure resistance and the stability of friction coefficient, and also has the effect of improving wear resistance, but the content of each is Z.
If n: less than 17% and Al: less than 2%, it is not possible to secure the desired effect on the above-mentioned action, while even if the content exceeds Zn: 40% and Al: 11%, further improving effect is not obtained. Since it does not appear, its contents are Zn: 17-40%, Al: 2
It was set at ~ 11%.
（ｂ） MnおよびSi これらの成分には、お互いに結合して、素地中に微細に
分散する金属間化合物を形成し、もって強度、靭性、お
よび耐摩耗性を向上させるほか、上記の通りSi成分には
Alと共に複酸化物を形成して、例えばシンクロナイザリ
ングとして適用した場合に相手部材に対する同期特性を
向上させ、かつ耐摩耗性を向上させる作用があるが、そ
の含有量がそれぞれMn:0.5％未満およびSi:0.1％未満で
は前記作用に所望の向上効果が得られず、一方その含有
量がそれぞれMn:6％およびSi:2％を越えると、スラグの
発生が多くなり、鋳造が難しくなるほか、合金の靭性が
低下するようになることから、その含有量をそれぞれM
n:0.5〜６％、Si:0.1〜２と定めた。(B) Mn and Si These components bond with each other to form an intermetallic compound finely dispersed in the matrix, thereby improving strength, toughness, and wear resistance. Ingredients
Forming a double oxide with Al, for example, when applied as a synchronizer ring to improve the synchronization characteristics to the mating member, and has the effect of improving wear resistance, the content of each Mn: less than 0.5% and Si: less than 0.1% can not obtain the desired improving effect on the above action, on the other hand, if the content exceeds Mn: 6% and Si: 2%, respectively, the occurrence of slag increases, making casting difficult, Since the toughness of the alloy will decrease, the content of each will be M
It was determined that n: 0.5 to 6% and Si: 0.1 to 2.
（ｃ） Fe,Ni,およびCo これらの成分には、素地中に分散してMn−Si系金属間化
合物を微細化し、合金の強度および靭性を向上させるほ
か、Siとも化合物を形成して耐摩耗性を向上させる作用
があるが、その含有量が0.1未満では前記作用に所望の
効果が得られず、一方その含有量が３％を越えると、靭
性が低下するようになると共に、鋳造性も劣化するよう
になることから、その含有量を0.1〜３％と定めた。(C) Fe, Ni, and Co These components are dispersed in the base material to make the Mn-Si intermetallic compound finer to improve the strength and toughness of the alloy, and also form a compound with Si to improve the resistance. Although it has the effect of improving wear resistance, if the content is less than 0.1, the desired effect cannot be obtained, while if the content exceeds 3%, the toughness decreases and the castability increases. Since it also deteriorates, the content is set to 0.1 to 3%.
（ｄ） P,Mg,およびCa これらの成分には、素地中に分散する上記の金属間化合
物を微細化して、合金の強度および靭性を改善するほ
か、酸化物を形成し、さらに例えばシンクロナイザリン
グとし適用した場合に、すぐれた同期特性を示す共に、
焼き付きを防止する作用があるが、その含有量が0.003
％未満では前記作用に所望の効果が得られず、一方その
含有量が0.3％を越えると、靭性および耐摩耗性に低下
傾向が現われるようになることらら、その含有量を0.00
3〜0.3％と定めた。(D) P, Mg, and Ca These components are made by refining the above intermetallic compound dispersed in the matrix to improve the strength and toughness of the alloy and form an oxide, and further, for example, a synchronizer ring. When applied with, it shows excellent synchronization characteristics and
It has the effect of preventing seizure, but its content is 0.003
When the content is less than 0.3%, the desired effect cannot be obtained. On the other hand, when the content exceeds 0.3%, the toughness and wear resistance tend to decrease.
It was set at 3 to 0.3%.
（ｅ） 酸素 酸素（O2）成分には、上記の通りAlおよびSi、さらにCr
などと結合して複酸化物を形成し、上記特性の改善に寄
与する作用があるが、その含有量が30ppm未満では、素
地中に微細に分散する酸化物の割合が少なすぎて所望の
特性改善効果が得られないばかりか、摩擦係数が不安定
になり、一方その含有量が1000ppmを越えると、酸化物
が凝集し、かつ多量となって強度および靭性が低下する
ようになることから、その含有量を30〜1000ppmと定め
た。(E) Oxygen Oxygen (O 2 ) components include Al and Si, and Cr as described above.
It forms a complex oxide by combining with, etc., and has the effect of contributing to the improvement of the above characteristics, but if the content is less than 30 ppm, the proportion of oxides finely dispersed in the matrix is too small and the desired characteristics Not only the improvement effect cannot be obtained, but the friction coefficient becomes unstable, and when the content exceeds 1000 ppm, the oxides agglomerate and become large, and the strength and toughness decrease, Its content was set at 30 to 1000 ppm.
（ｆ） Cr Cr成分には、鉄族金属と金属間化合物を形成すると共
に、酸化物を形成して、より一層耐摩耗性を向上させ、
かつ摩擦係数を安定化する作用があるので、必要に応じ
て含有されるが、その含有量が0.05％未満では前記作用
に所望の向上効果が得られず、一方その含有量が１％を
越えると、合金の靭性が低下するようになることから、
その含有量を0.05〜１％と定めた。(F) Cr The Cr component forms an intermetallic compound with an iron group metal and forms an oxide to further improve wear resistance,
In addition, since it has the effect of stabilizing the friction coefficient, it is contained as necessary, but if the content is less than 0.05%, the desired improving effect on the above-mentioned effect cannot be obtained, while the content exceeds 1%. And the toughness of the alloy will decrease,
Its content was defined as 0.05-1%.
（ｇ） PbおよびSn これらの成分には、特にこの合金を例えばシンクロナイ
ザリングとして適用した場合に、高負荷摩擦条件下での
焼き付きを防止するほか、摩擦係数を適正値に調整でき
る作用があるので、必要に応じて含有されるが、その含
有量が0.05％未満では前記作用に所望の向上効果が得ら
れず、一方その含有量が２％を越えると、強度および靭
性が低下するようになることから、その含有量を0.05〜
２％と定めた。(G) Pb and Sn These components have the effect of preventing seizure under high load friction conditions and adjusting the friction coefficient to an appropriate value, especially when this alloy is applied as a synchronizer ring, for example. , If necessary, but if the content is less than 0.05%, the desired improving effect on the above-mentioned action cannot be obtained, while if the content exceeds 2%, the strength and toughness deteriorate. Therefore, the content of 0.05 ~
It was set at 2%.
つぎに、この発明のCu合金を実施例により具体的に説明
する。Next, the Cu alloy of the present invention will be specifically described by way of Examples.
通常の高周波炉を用い、溶解雰囲気をArガスとCOガスの
混合ガス雰囲気とし、かつO2含有量の調整は前記混合ガ
ス雰囲気のうちのCOガスの供給を止めた状態で、所定料
のO2を溶湯に吹き込むことによって行ない、それぞれ第
１表に示される成分組成をもった溶湯を調整し、これら
の溶湯をそれぞれ水冷鋳型に鋳造し、直径:200mm×長
さ:400mmのビレットとし、このビレットに600〜750℃の
範囲内の所定温度で熱間押出し加工を施して、所定径の
丸棒試験片とし、ついでこの丸棒試験片に550〜700℃の
範囲内の所定温度に１時間保持後空冷の熱処理を施すこ
とによって本発明Cu合金１〜30および比較Cu合金１〜14
をそれぞれ製造した。An ordinary high-frequency furnace is used, the melting atmosphere is a mixed gas atmosphere of Ar gas and CO gas, and the O 2 content is adjusted by stopping the supply of CO gas in the mixed gas atmosphere, and then supplying a predetermined amount of O 2. 2 is blown into the molten metal to prepare molten metal having the composition shown in Table 1, and these molten metals are cast into water-cooled molds to form billets with a diameter of 200 mm and a length of 400 mm. The billet is subjected to hot extrusion at a predetermined temperature within the range of 600 to 750 ° C to form a round bar test piece of a predetermined diameter, and then this round bar test piece is subjected to a predetermined temperature within the range of 550 to 700 ° C for 1 hour. The present invention Cu alloys 1-30 and comparative Cu alloys 1-14 by subjecting to air-cooling heat treatment after holding.
Were manufactured respectively.
なお、比較Cu合金１〜14は、いずれも構成成分のうちの
いずれかの成分含有量（第１表に※印 を付したもの）がこの発明の範囲から外れたものであ
る。In addition, the comparative Cu alloys 1 to 14 all contain any one of the constituent components (marked with * in Table 1). Are attached) are outside the scope of the present invention.
つぎに、この結果得られた本発明Cu合金１〜30および比
較Cu合金１〜14について、強度を評価する目的で引張強
さ、靭性を評価する目的でシャルピー衝撃性と伸びを測
定し、さらに耐摩耗性と、部材に対する同期特性を評価
する目的で、 試料：直径3mmのピン材、 相手材:JIS・SCM420の浸炭焼入鋼（硬さ:HRC61.5）、 オイル：ギヤオイル90番、 油温:70℃、 摩擦速度:3m/sec、 圧力:80kg/cm2、 滑り距離:1.5km、 の条件でピン摩擦試験を行ない、比摩耗量を測定すると
共に、トルクメータから摩擦係数を算出した。これらの
結果を第２表に示した。Next, for the present invention Cu alloys 1 to 30 and comparative Cu alloys 1 to 14 thus obtained, tensile strength for the purpose of evaluating strength, Charpy impact and elongation for the purpose of evaluating toughness were measured, and For the purpose of evaluating the wear resistance and the synchronization characteristics of the members, sample: Pin material with a diameter of 3 mm, counterpart material: JIS / SCM420 carburized and hardened steel (hardness: H R C61.5), oil: gear oil No. 90 , Oil temperature: 70 ℃, Friction speed: 3m / sec, Pressure: 80kg / cm 2 , Sliding distance: 1.5km, Pin friction test is performed to measure the specific wear amount and the friction coefficient from the torque meter. It was calculated. The results are shown in Table 2.
第１表および第２表に示される結果から、本発明Cu合金
１〜30は、いずれも高強度および高靭性を有し、さらに
すぐれた耐摩耗性と高い摩擦係数を有するのに対して、
比較Cu合金１〜14に見られるように、構成成分のうちの
いずれかの成分含有量がこの発明の範囲から外れると、
上記の特性のうちの少なくともいずれかの特性が劣った
ものになることが明らかである。From the results shown in Table 1 and Table 2, while the Cu alloys 1 to 30 of the present invention have high strength and high toughness, and further have excellent wear resistance and high friction coefficient,
As seen in Comparative Cu alloys 1 to 14, when the content of any of the constituents is out of the scope of the present invention,
It is clear that at least one of the above properties will be inferior.
上述のように、この発明のCu合金は、高強度および高靭
性を有し、さらにすぐれた耐摩耗性と高い摩擦係数を有
するので、特にこれらの特性が要求される自動車のトラ
ンスミッション構造部材や変速機のシンクロナイザリン
グなどの製造に用いた場合に、これら機器の小型化、軽
量化、および高出力化を可能とするなど工業上有用な特
性を有するのである。As described above, the Cu alloy of the present invention has high strength and high toughness, and further has excellent wear resistance and high friction coefficient. When it is used for manufacturing a machine synchronizer ring, etc., it has industrially useful characteristics such as downsizing, weight reduction and high output of these devices.
Claims (4)
％、 P,Mg,およびCaのうちの１種または２種以上:0.003〜0.3
％、 酸素:30〜1000ppm、 を含有し、残りがCuと不可避不純物からなる組成（以上
重量％）、並びに素地中に金属間化合物と酸化物が均一
に分散した組織を有することを特徴とする高強度および
高靭性を有する耐摩耗性Cu合金。1. Zn: 17-40%, Al: 2-11%, Mn: 0.5-6%, Si: 0.1-2%, one or more of Fe, Ni, and Co: 0.1 ~ 3
%, P, Mg, and one or more of Ca: 0.003 to 0.3
%, Oxygen: 30 to 1000 ppm, with the balance consisting of Cu and unavoidable impurities (more than wt%), and a structure in which intermetallic compounds and oxides are uniformly dispersed in the matrix. Wear resistant Cu alloy with high strength and toughness.
％、 P,Mg,およびCaのうちの１種または２種以上:0.003〜0.3
％、 酸素:30〜1000ppm、 を含有し、さらに、 Cr:0.05〜１％、 を含有し、残りがCuと不可避不純物からなる組成（以上
重量％）、並びに素地中に金属間化合物と酸化物が均一
分散した組織を有することを特徴とする高強度および高
靭性を有する耐摩耗性Cu合金。2. Zn: 17-40%, Al: 2-11%, Mn: 0.5-6%, Si: 0.1-2%, one or more of Fe, Ni, and Co: 0.1 ~ 3
%, P, Mg, and one or more of Ca: 0.003 to 0.3
%, Oxygen: 30 to 1000 ppm, and Cr: 0.05 to 1%, with the balance being Cu and unavoidable impurities (above wt%), and intermetallic compounds and oxides in the matrix. A wear-resistant Cu alloy having high strength and high toughness, characterized by having a uniformly dispersed structure.
％、 P,Mg,およびCaのうちの１種または２種以上:0.003〜0.3
％、 酸素:30〜1000ppm、 を含有し、さらに、 PbおよびSnのうちの１種または２種:0.05〜２％、 を含有し、残りがCuと不可避不純物からなる組成（以上
重量％）、並びに素地中に金属間化合物と酸化物が均一
に分散した組織を有することを特徴とする高強度および
高靭性を有する耐摩耗性Cu合金。3. Zn: 17 to 40%, Al: 2 to 11%, Mn: 0.5 to 6%, Si: 0.1 to 2%, one or more of Fe, Ni and Co: 0.1 ~ 3
%, P, Mg, and one or more of Ca: 0.003 to 0.3
%, Oxygen: 30 to 1000 ppm, and further, one or two of Pb and Sn: 0.05 to 2%, and the balance comprising Cu and inevitable impurities (above weight%), Also, a wear-resistant Cu alloy having high strength and high toughness, which has a structure in which an intermetallic compound and an oxide are uniformly dispersed in the matrix.
％、 P,Mg,およびCaのうちの１種または２種以上:0.003〜0.3
％、 酸素:30〜1000ppm、 を含有し、さらに、 Cr:0.05〜１％と、 PbおよびSnのうちの１種または２種:0.05〜２％、 を含有し、残りがCuと不可避不純物からなる組成（以上
重量％）、並びに素地中に金属間化合物と酸化物が均一
に分散した組織を有することを特徴とする高強度および
高靭性を有する耐摩耗性Cu合金。4. Zn: 17-40%, Al: 2-11%, Mn: 0.5-6%, Si: 0.1-2%, one or more of Fe, Ni, and Co: 0.1 ~ 3
%, P, Mg, and one or more of Ca: 0.003 to 0.3
%, Oxygen: 30 to 1000 ppm, Cr: 0.05 to 1%, and one or two of Pb and Sn: 0.05 to 2%, and the rest from Cu and inevitable impurities. Wear-resistant Cu alloy having high strength and high toughness, characterized by having the following composition (above wt%) and a structure in which intermetallic compounds and oxides are uniformly dispersed in the matrix.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21067587A JPH07107183B2 (en) | 1987-08-25 | 1987-08-25 | Wear resistant Cu alloy with high strength and toughness |
| KR1019880000715A KR910001011B1 (en) | 1987-02-24 | 1988-01-28 | Synchronizer ring in speed varlator made of wear-resistant copper alloy having high strength and toughness |
| US07/157,634 US4874439A (en) | 1987-02-24 | 1988-02-18 | Synchronizer ring in speed variator made of wear-resistant copper alloy having high strength and toughness |
| DE3805794A DE3805794C2 (en) | 1987-02-24 | 1988-02-24 | Wear-resistant copper alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21067587A JPH07107183B2 (en) | 1987-08-25 | 1987-08-25 | Wear resistant Cu alloy with high strength and toughness |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6455348A JPS6455348A (en) | 1989-03-02 |
| JPH07107183B2 true JPH07107183B2 (en) | 1995-11-15 |
Family
ID=16593250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21067587A Expired - Lifetime JPH07107183B2 (en) | 1987-02-24 | 1987-08-25 | Wear resistant Cu alloy with high strength and toughness |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07107183B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071375A (en) * | 2011-01-14 | 2011-05-25 | 南京信息工程大学 | Anti-corrosion copper alloy material and preparation method thereof |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR910003882B1 (en) * | 1988-12-21 | 1991-06-15 | 풍산금속공업주식회사 | Cu-alloy for electric parts and the process for making |
| JP2745695B2 (en) * | 1989-07-03 | 1998-04-28 | 三菱マテリアル株式会社 | Copper-based sintered alloy with excellent wear resistance at high temperatures |
| JP2745696B2 (en) * | 1989-07-03 | 1998-04-28 | 三菱マテリアル株式会社 | Copper-based sintered alloy with excellent wear resistance at high temperatures |
| JP2745699B2 (en) * | 1989-07-14 | 1998-04-28 | 三菱マテリアル株式会社 | Copper-based sintered alloy with excellent wear resistance at high temperatures |
| JP2745757B2 (en) * | 1990-02-06 | 1998-04-28 | 三菱マテリアル株式会社 | Copper-based sintered alloy with excellent wear resistance at high temperatures |
| JP5040096B2 (en) | 2005-02-25 | 2012-10-03 | トヨタ自動車株式会社 | Manufacturing method of power transmission device |
| CN101787461B (en) * | 2010-03-02 | 2014-11-19 | 路达(厦门)工业有限公司 | Environment-friendly manganese brass alloy and manufacturing method thereof |
| CL2010000655A1 (en) * | 2010-06-18 | 2010-10-22 | Com Kraviva Spa | Copper alloy horseshoes with bactericidal and fungicidal properties comprising copper, zinc, aluminum, iron and optionally manganese. |
| CN104232985A (en) * | 2014-09-25 | 2014-12-24 | 江苏鑫成铜业有限公司 | High-corrosion-resistance copper alloy |
| EP3992319A1 (en) * | 2020-10-29 | 2022-05-04 | Otto Fuchs - Kommanditgesellschaft - | Alloy product made of a lead-free copper-zinc alloy and method for producing the same |
-
1987
- 1987-08-25 JP JP21067587A patent/JPH07107183B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071375A (en) * | 2011-01-14 | 2011-05-25 | 南京信息工程大学 | Anti-corrosion copper alloy material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6455348A (en) | 1989-03-02 |
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