JPH029662B2 - - Google Patents
Info
- Publication number
- JPH029662B2 JPH029662B2 JP21994685A JP21994685A JPH029662B2 JP H029662 B2 JPH029662 B2 JP H029662B2 JP 21994685 A JP21994685 A JP 21994685A JP 21994685 A JP21994685 A JP 21994685A JP H029662 B2 JPH029662 B2 JP H029662B2
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- wear resistance
- brass
- strength
- effect
- 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.)
- Expired
Links
- 229910045601 alloy Inorganic materials 0.000 claims description 16
- 239000000956 alloy Substances 0.000 claims description 16
- 229910001369 Brass Inorganic materials 0.000 claims description 14
- 239000010951 brass Substances 0.000 claims description 14
- 230000000694 effects Effects 0.000 description 8
- 229910000765 intermetallic Inorganic materials 0.000 description 5
- 239000002244 precipitate Substances 0.000 description 4
- 238000005204 segregation Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910017305 Mo—Si Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
Landscapes
- Sliding-Contact Bearings (AREA)
- Mechanical Operated Clutches (AREA)
Description
この発明は、黄銅合金特に耐摩耗性が必要とさ
れる用途に有用な黄銅合金に関するものである。
従来、高速高荷重の下で使用される耐摩耗性黄
銅合金としては、高力黄銅にSiを添加して高硬度
のMn5Si3等の化合物を析出させたものが使用さ
れている。しかしながら高速化、潤滑油の低粘度
化等により使用条件が一段と苛酷な摺動条件化で
は耐摩耗性等実用面で充分とはいえず更に高性能
なものが望まれている。
本発明は上記の点に鑑みて提案されたもので、
高力黄銅に比べて優れた耐摩耗性を有する銅合金
を提供することを目的とし、重量％でCu55〜70
％、Al0.5〜６・０％、Fe0.1〜3.0％、Si0.1〜2.0
％、Ni0.5〜5.0％、Co0.1〜2.0％、Mo0.01〜1.0
％および残部はZnよりなること、およびこの合
金にPb0.1〜3.0％添加したことを特徴とする。
上記各構成元素を選定し、また上記割合に限定
した理由は以下の通りである。
即ち、Alはβ相形成促進元素であり、合金の
機械的強度を高めるが、添加量が6.0％以上では
鋳造組織の粗大化傾向があり、また酸化スラグを
生成しやすく、靭性が低下する。一方添加量が
0.5％以下では強靭効果が認められない。
Feは金属間化合物を強化し、また鋳造組織を
微細化する効果がある。ただし、添加量が3.0％
を上回ると金属間化合物が粗大化して機械加工性
を損ない、また耐摩耗性でバラツキが大きくな
る。一方添加量が0.1％を下回ると上記効果は認
められない。
Niはα相形成促進元素でマトリツクスの靭性
を向上させ、またFeとの共存で金属間化合物を、
均一に分布させる。この点を勘案した場合Niの
添加量は0.5〜5.0％が好適範囲である。
Coは結晶粒微細化、および金属間化合物（Al，
Si，Co，Fe）3（Ni，Co，Fe）2を出して耐摩耗性
および強度向上に著しく寄与するが、2.0％以上
では析出物が粗大化し、0.1％以下ではその効果
は少ない。
Moは本合金特有の金属間化合物を析出させる
には必須の元素で、上記の（Al，Si，Co，Fe）3
（Ni，Co，Fe）2以外に、更に高硬度なMo−Si系
析出物を析出し、これが耐摩耗性に著しい効果を
示し、1.0％以上では析出物が粗大化し、偏析が
生じ、0.01％以下では上記効河が認められない。
またSiもMoと同様に金属間化合物を強化し0.1
〜２％が好適範囲である。２％以上では析出物の
偏析あるいは靭性が低下し、0.1％以下ではその
効果が少ない。
Pbは上記黄銅合金の優れた耐摩耗性を維持し
ながら、機械加工性、特に被切削性を向上させる
ことを目的とし、添加量が３％以上では成分偏析
が著しくなり強度低下が見られ、一方添加量が
0.1％以下では被切削性を向上させる効果は認め
られない。
以下、本発明の実施例について説明する。
実施例 １
この発明合金の各種組成のものと、公知の高力
黄銅を溶解鋳造し熱間鍛造したものの、特性値を
比較したところ第１表の結果が得られた。この結
果から本発明合金が従来の高力黄銅に比較して引
張り試験、硬度とも従来品より優れており、靭性
に優れているといえる。
実施例 ２
この発明合金（No.２，３およびNo.５，６）と市
販の高力黄銅No.１（従来の高力黄銅ではNo.１のSi
−Mn系のものが耐摩耗性が優れている）および
No.２とを用いて自動車用変速機のシンクロナイザ
ーリングを作成し、それのテーパ面と、鋼材
（JIS記号SCM420H）により作成したテーパコー
ンとの摺動による摩耗試験の結果を第２表に示
す。
試験条件は、リング押付荷重60Kgｆ、摺動速度
4.7m／sec、押付回数2000回とし、潤滑油はATF
デクスロンとSAE10w−30の２種類とする。なお
摩耗変位量は、テーパコーン軸方向に対する変位
量である。
以上の通り本発明合金は、従来の高力黄銅合金
よりも機械的性質の優れた耐摩耗性黄銅合金で、
特に高速、高荷重における耐摩耗性が優れてお
り、過酷な使用条件に充分に耐え得る合金であ
る。
TECHNICAL FIELD This invention relates to brass alloys, particularly brass alloys useful in applications requiring wear resistance. Conventionally, wear-resistant brass alloys used under high-speed and high-load conditions have been made by adding Si to high-strength brass to precipitate highly hard compounds such as Mn 5 Si 3 . However, as the operating conditions become more severe due to higher speeds, lower viscosity of lubricating oil, etc., the wear resistance is not sufficient from a practical point of view, and even higher performance is desired. The present invention was proposed in view of the above points, and
The purpose is to provide a copper alloy with superior wear resistance compared to high-strength brass, with Cu55~70 in weight%.
%, Al0.5~6.0%, Fe0.1~3.0%, Si0.1~2.0
%, Ni0.5~5.0%, Co0.1~2.0%, Mo0.01~1.0
% and the balance consists of Zn, and this alloy is characterized by having Pb added in an amount of 0.1 to 3.0%. The reasons for selecting each of the above constituent elements and limiting them to the above proportions are as follows. That is, Al is an element that promotes β phase formation and increases the mechanical strength of the alloy, but if the amount added is 6.0% or more, the cast structure tends to become coarser, and oxidized slag is likely to be generated, resulting in a decrease in toughness. On the other hand, the amount added
No toughening effect is observed below 0.5%. Fe has the effect of strengthening intermetallic compounds and refining the casting structure. However, the amount added is 3.0%
If it exceeds this, the intermetallic compounds will become coarse, impairing machinability, and variations in wear resistance will increase. On the other hand, if the amount added is less than 0.1%, the above effects are not observed. Ni is an element that promotes α phase formation and improves the toughness of the matrix.
Evenly distributed. Taking this point into consideration, the preferable range for the amount of Ni added is 0.5 to 5.0%. Co improves grain refinement and intermetallic compounds (Al,
Si, Co, Fe) 3 (Ni, Co, Fe) 2 is released and significantly contributes to improving wear resistance and strength, but if it exceeds 2.0%, the precipitates become coarse, and if it is below 0.1%, the effect is small. Mo is an essential element to precipitate the intermetallic compound unique to this alloy, and is a component of the above (Al, Si, Co, Fe) 3
(Ni, Co, Fe) In addition to 2 , even higher hardness Mo-Si precipitates are precipitated, which has a remarkable effect on wear resistance, and at 1.0% or more, the precipitates become coarse and segregation occurs; % or less, the above effect is not recognized. Also, like Mo, Si also strengthens intermetallic compounds and 0.1
~2% is a preferred range. If it is more than 2%, segregation of precipitates or toughness will be reduced, and if it is less than 0.1%, the effect will be small. The purpose of Pb is to improve machinability, especially machinability, while maintaining the excellent wear resistance of the above-mentioned brass alloy.If the amount added is 3% or more, component segregation becomes significant and strength decreases. On the other hand, the amount added
At 0.1% or less, no effect on improving machinability is observed. Examples of the present invention will be described below. Example 1 The characteristic values of alloys of various compositions of this invention and those made of known high-strength brass melted and cast and hot forged were compared, and the results shown in Table 1 were obtained. From these results, it can be said that the alloy of the present invention is superior to conventional high-strength brass in both tensile test and hardness, and has excellent toughness. Example 2 This invention alloy (No. 2, 3 and No. 5, 6) and commercially available high strength brass No. 1 (conventional high strength brass No. 1 Si)
−Mn-based materials have excellent wear resistance) and
A synchronizer ring for an automobile transmission was made using No. 2, and Table 2 shows the results of a wear test by sliding the tapered surface of the synchronizer ring with a taper cone made of steel material (JIS symbol SCM420H). . The test conditions were a ring pressing load of 60 kgf and a sliding speed.
4.7m/sec, 2000 times of pressing, lubricating oil is ATF.
There are two types: Dexron and SAE10w-30. Note that the amount of wear displacement is the amount of displacement with respect to the axial direction of the taper cone. As described above, the alloy of the present invention is a wear-resistant brass alloy with superior mechanical properties than conventional high-strength brass alloys.
This alloy has particularly excellent wear resistance at high speeds and high loads, and can withstand harsh usage conditions.
【表】【table】
【表】【table】
Claims (1)
Fe0.1〜3.0％、Si0.1〜2.0％、Ni0.5〜5.0％、
Co0.1〜2.0％、Mo0.01〜1.0％および残部はZnか
らなることを特徴とする耐摩耗性黄銅合金。 ２ 重量割合でCu55〜70％、Al0.5〜6.0％、
Fe0.1〜3.0％、Ni0.5〜5.0％、Co0.1〜2.0％、
Si0.1〜2.0％、Mo0.01〜1.0％、Pb0.1〜3.0％およ
び残部はZnからなることを特徴とする耐摩耗性
黄銅合金。[Claims] 1. Cu55-70%, Al0.5-6.0% by weight,
Fe0.1~3.0%, Si0.1~2.0%, Ni0.5~5.0%,
A wear-resistant brass alloy comprising 0.1-2.0% Co, 0.01-1.0% Mo, and the balance Zn. 2 Cu55-70%, Al0.5-6.0% by weight,
Fe0.1~3.0%, Ni0.5~5.0%, Co0.1~2.0%,
A wear-resistant brass alloy comprising 0.1-2.0% Si, 0.01-1.0% Mo, 0.1-3.0% Pb, and the balance Zn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21994685A JPS6280244A (en) | 1985-10-02 | 1985-10-02 | Wear resistant brass alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21994685A JPS6280244A (en) | 1985-10-02 | 1985-10-02 | Wear resistant brass alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6280244A JPS6280244A (en) | 1987-04-13 |
| JPH029662B2 true JPH029662B2 (en) | 1990-03-02 |
Family
ID=16743508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21994685A Granted JPS6280244A (en) | 1985-10-02 | 1985-10-02 | Wear resistant brass alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6280244A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04363515A (en) * | 1990-10-03 | 1992-12-16 | Tokai:Kk | Gas lighter with safety device |
| DE4240157A1 (en) * | 1992-11-30 | 1994-06-01 | Chuetsu Metal Works | Brass-alloy coated synchroniser ring surface - exhibits good wear-resistance and adhesion, said synchroniser rings for use in gears of high performance vehicles. |
| DE4339426C2 (en) * | 1993-11-18 | 1999-07-01 | Diehl Stiftung & Co | Copper-zinc alloy |
-
1985
- 1985-10-02 JP JP21994685A patent/JPS6280244A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6280244A (en) | 1987-04-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |