JPH02134425A - Disk rotor material - Google Patents
Disk rotor materialInfo
- Publication number
- JPH02134425A JPH02134425A JP28374088A JP28374088A JPH02134425A JP H02134425 A JPH02134425 A JP H02134425A JP 28374088 A JP28374088 A JP 28374088A JP 28374088 A JP28374088 A JP 28374088A JP H02134425 A JPH02134425 A JP H02134425A
- Authority
- JP
- Japan
- Prior art keywords
- strength
- specific
- effect
- cast iron
- cooling
- 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
Links
- 239000000463 material Substances 0.000 title claims abstract description 13
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 8
- 239000000956 alloy Substances 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 9
- 229910001018 Cast iron Inorganic materials 0.000 abstract description 9
- 229910002804 graphite Inorganic materials 0.000 abstract description 9
- 239000010439 graphite Substances 0.000 abstract description 9
- 238000010438 heat treatment Methods 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 239000011159 matrix material Substances 0.000 abstract description 4
- 238000013016 damping Methods 0.000 abstract description 3
- 238000000280 densification Methods 0.000 abstract description 2
- 229910001562 pearlite Inorganic materials 0.000 abstract description 2
- 229920002165 CarbonCast Polymers 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 239000002783 friction material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/0006—Noise or vibration control
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は自動車、車両、産業機械等に用いられているデ
ィスクブレーキ用のディスクロータ材に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disc rotor material for disc brakes used in automobiles, vehicles, industrial machines, etc.
〔従来の技術および発明が解決しようとする課題〕周知
のようにディスクブレーキは車軸に固定されて回転する
ロータの両側面に摩擦材を押し付けてブレーキ力を発生
するものである。[Prior Art and Problems to be Solved by the Invention] As is well known, a disc brake generates braking force by pressing friction materials against both sides of a rotor that is fixed to an axle and rotates.
このようなロータとしては機械的強度や耐摩耗性等が要
求され、さらにブレーキ時のノイズの小さいことも重要
な要素である。Such a rotor is required to have mechanical strength, wear resistance, etc., and low noise during braking is also an important factor.
そして従来のロータ用材料としては通常ＦＣ２０〜２５
の普通鋳鉄やＦＣＩＯのような高炭素鋳鉄が用いられて
いる。しかしながら上記高炭素鋳鉄はノイズの発生は少
ないが強度が著しく低（、また普通鋳鉄は強度は十分で
あるがノイズ低減の効果が不十分であった。そこでこれ
ら強度とノイズ低減効果を合わせ持つ材料の開発が望ま
れていた。Conventional rotor materials are usually FC20 to 25.
Normal cast iron and high carbon cast iron such as FCIO are used. However, the above-mentioned high carbon cast iron generates little noise but has extremely low strength (and ordinary cast iron has sufficient strength but has insufficient noise reduction effect. Therefore, materials that have both strength and noise reduction effect) development was desired.
本発明はこれに鑑み種々検討した結果、ノイズ低減効果
を有し、強度も高いディスクロータ材を開発したもので
、Ｃ３，７〜４．２ｗｔＬ Ｓ ｉ２．３〜３．０ｗ
ｔＬ Ｍｎ０．７〜３．０ｗｔＸおよびＣｒＯ１２〜１
．０ｗｔ％を含み、残部Ｆｅと不可避的不純物からなる
合金を８００〜９５０℃に０．５〜２時間保持した後、
２〜ｂ
冷してなることを特徴とするものである。In view of this, as a result of various studies, the present invention has developed a disc rotor material that has a noise reduction effect and has high strength.
tL Mn0.7~3.0wtX and CrO12~1
．． After holding the alloy containing 0 wt% and the balance consisting of Fe and unavoidable impurities at 800 to 950°C for 0.5 to 2 hours,
2-b It is characterized by being chilled.
このようにＣとＳｉの含有量を上記の範囲とするのは、
鋳鉄組織内で遊離黒鉛を多量に析出させて鋳鉄の減衰率
を高めることができ、従ってブレーキ時に発生するノイ
ズの低減効果を高めることが可能となるからである。Setting the content of C and Si within the above range is as follows:
This is because a large amount of free graphite can be precipitated within the cast iron structure to increase the damping rate of the cast iron, thereby increasing the effect of reducing noise generated during braking.
さらにＭｎとＣｒの上記含有は、強制空冷によるマトリ
ックス緻密化の効果を促進するためである。Furthermore, the above-mentioned inclusion of Mn and Cr is for promoting the effect of matrix densification by forced air cooling.
また多量に析出する遊離黒鉛は片状黒鉛であるため切欠
感受性が大きく、マトリックスに比べてはるかに強度的
に劣る。そこでこれに対処するため８００〜９５０℃で
０．５〜２時間保持することにより、この片状黒鉛の尖
端を固溶させて丸みをつけ、塊状化することで強度アッ
プを図っている。Furthermore, since the free graphite that precipitates in large quantities is flaky graphite, it is highly sensitive to notches and is far inferior in strength compared to the matrix. Therefore, in order to deal with this, by holding the graphite at 800 to 950° C. for 0.5 to 2 hours, the tips of the flaky graphite are dissolved into solid solution, rounded, and lumped to increase strength.
さらに上記加熱処理後に２〜３０℃７ｓｅｃの速度で冷
却するのは基地のパーライトを緻密化させて材料の強度
向上を目的とするためである。Furthermore, the reason why the material is cooled at a rate of 2 to 30 DEG C. and 7 seconds after the heat treatment is to densify the base pearlite and improve the strength of the material.
次に本発明の実施例について説明する。 Next, examples of the present invention will be described.
第１表に示すような組成の合金を常法に従って溶解して
鋳造し、その後第２表に示す条件で熱処理した。そして
熱処理前後でその材料の引張強さと対数減衰率を測定し
、その結果を第２表に併記した。なお強制空冷の方法は
本発明材Ｎ０． １の場合は送風により行い、本発明材
Ｎ０． ２の場合は送風と強制的な水滴噴霧を組み合わ
せて行った。Alloys having the compositions shown in Table 1 were melted and cast according to conventional methods, and then heat treated under the conditions shown in Table 2. The tensile strength and logarithmic decay rate of the material were measured before and after heat treatment, and the results are also listed in Table 2. Note that the forced air cooling method was used for the present invention material No. In the case of No. 1, it was carried out by blowing air, and in the case of No. 1 of the present invention material. In case 2, a combination of air blowing and forced spraying of water droplets was used.
第２表から明らかなように本発明合金はいずれも熱処理
によって僅かに減衰率は低下するが、従来の鋳鉄に比べ
て十分効果のある値であってノイズの低減には大いに有
効である。また本発明合金は強度の点からも十分である
。As is clear from Table 2, the attenuation rate of all of the alloys of the present invention is slightly reduced by heat treatment, but this value is sufficiently effective compared to conventional cast iron and is highly effective in reducing noise. The alloy of the present invention is also sufficient in terms of strength.
このように本発明によれば、ディスクロータ材料の合金
中のＣとＳｉの含有量を多くして遊離黒鉛を多量に析出
、成長させて減衰性を高くすると共に、熱処理を行って
マトリックスの緻密化と片状黒鉛の塊状化を実施して強
度の向上をも実現した等工業上顕著な効果を奏するもの
である。As described above, according to the present invention, the content of C and Si in the alloy of the disc rotor material is increased to cause a large amount of free graphite to precipitate and grow, thereby increasing the damping property, and at the same time, heat treatment is performed to densify the matrix. It has achieved remarkable industrial effects, such as improved strength by agglomerating flaky graphite.
Claims (1)
ｔ％、Ｍｎ０．７〜３．０ｗｔ％およびＣｒ０．２〜１
．０ｗｔ％を含み、残部Ｆｅと不可避的不純物からなる
合金を８００〜９５０℃に０．５〜２時間保持した後、
２〜３０℃／ｓｅｃの冷却速度で強制空冷してなること
を特徴とするディスクロータ材。(1) C3.7-4.2wt%, Si2.3-3.0w
t%, Mn0.7-3.0wt% and Cr0.2-1
．． After holding the alloy containing 0 wt% and the balance consisting of Fe and unavoidable impurities at 800 to 950°C for 0.5 to 2 hours,
A disc rotor material characterized by being formed by forced air cooling at a cooling rate of 2 to 30°C/sec.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28374088A JPH02134425A (en) | 1988-11-11 | 1988-11-11 | Disk rotor material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28374088A JPH02134425A (en) | 1988-11-11 | 1988-11-11 | Disk rotor material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02134425A true JPH02134425A (en) | 1990-05-23 |
Family
ID=17669491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28374088A Pending JPH02134425A (en) | 1988-11-11 | 1988-11-11 | Disk rotor material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02134425A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5330036A (en) * | 1991-10-31 | 1994-07-19 | Elephant Chain Block Company Limited | Mechanical brake for a hoist and traction machine |
| WO2021256337A1 (en) | 2020-06-16 | 2021-12-23 | 日清紡ブレーキ株式会社 | Friction pair |
| WO2021256338A1 (en) | 2020-06-16 | 2021-12-23 | 日清紡ブレーキ株式会社 | Friction pair |
| WO2021256336A1 (en) | 2020-06-16 | 2021-12-23 | 日清紡ブレーキ株式会社 | Friction pair |
-
1988
- 1988-11-11 JP JP28374088A patent/JPH02134425A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5330036A (en) * | 1991-10-31 | 1994-07-19 | Elephant Chain Block Company Limited | Mechanical brake for a hoist and traction machine |
| WO2021256337A1 (en) | 2020-06-16 | 2021-12-23 | 日清紡ブレーキ株式会社 | Friction pair |
| WO2021256338A1 (en) | 2020-06-16 | 2021-12-23 | 日清紡ブレーキ株式会社 | Friction pair |
| WO2021256336A1 (en) | 2020-06-16 | 2021-12-23 | 日清紡ブレーキ株式会社 | Friction pair |
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