JPH06228539A - Nonasbestine friction material - Google Patents
Nonasbestine friction materialInfo
- Publication number
- JPH06228539A JPH06228539A JP4207993A JP4207993A JPH06228539A JP H06228539 A JPH06228539 A JP H06228539A JP 4207993 A JP4207993 A JP 4207993A JP 4207993 A JP4207993 A JP 4207993A JP H06228539 A JPH06228539 A JP H06228539A
- Authority
- JP
- Japan
- Prior art keywords
- friction material
- asbestos
- hard
- hard inorganic
- rotor
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は自動車のブレーキパッド
やライニング或いはクラッチフェーシング等として使用
される非石綿系摩擦材に関するものであり、更に詳しく
は、例えばローターやドラム等のような対面が、アルミ
合金をマトリックスとし各種セラミック材により補強さ
れているものと組み合わせることにより、優れた効き及
び耐摩耗性を発揮すると共に対面攻撃性に優れる非石綿
系摩擦材に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-asbestos-based friction material used as a brake pad for automobiles, linings, clutch facings, and the like. More specifically, the facing surface such as a rotor or a drum is made of aluminum. The present invention relates to a non-asbestos-based friction material that exhibits excellent effectiveness and wear resistance and is excellent in face-to-face attack by combining with an alloy as a matrix and reinforced with various ceramic materials.
【０００２】[0002]
【従来の技術】従来は、例えば自動車のブレーキにおけ
るローターやドラム等の対面（摩擦材が接する面）に
は、主としてＦＣ２５等の鋳鉄が使用されていたが、近
年になって、環境問題の見直しから、自動車の軽量化に
よる低燃費化への検討が進み、その中で、ブレーキのロ
ーターやドラム等の軽量化素材として、主にアルミ合金
をマトリックスとし、炭化ケイ素（ＳｉＣ）、アルミナ
（Ａｌ2Ｏ3）、酸化ケイ素（ＳｉＯ2）、酸化ジルコニ
ウム（ＺｒＯ2）や酸化マグネシウム（ＭｇＯ）等のセ
ラミック材による粒子やウイスカー等の硬質素材により
補強されたものが検討され始めた。2. Description of the Related Art Conventionally, cast iron such as FC25 has been mainly used as a facing surface (a surface contacting a friction material) such as a rotor and a drum in a brake of an automobile, but in recent years, environmental problems have been reviewed. From this point of view, studies are underway to reduce fuel consumption by reducing the weight of automobiles. Among them, aluminum alloys are mainly used as a matrix for weight reduction materials such as brake rotors and drums, and silicon carbide (SiC), alumina (Al 2 Particles made of ceramic materials such as O 3 ), silicon oxide (SiO 2 ), zirconium oxide (ZrO 2 ) and magnesium oxide (MgO) and those reinforced by hard materials such as whiskers have begun to be investigated.
【０００３】又、ブレーキパッド等に使用される摩擦材
に関しても、従来は基材として石綿を使用していたもの
が多かったが、人体への安全性の見地から、石綿を使用
しない非石綿系摩擦材へ移行しつつあり、このような非
石綿系摩擦材用の繊維成分としては、耐熱性有機繊維、
ガラス繊維、金属繊維等が、結合材としてフェノール樹
脂が、更に充填材として黒鉛、硫酸バリウム、炭酸カル
シウムや金属粉等が用いられている。As for friction materials used for brake pads and the like, asbestos has been conventionally used as a base material in many cases. However, from the viewpoint of safety for human bodies, non-asbestos-based materials are used. As the fiber component for such non-asbestos-based friction material is shifting to friction material, heat-resistant organic fiber,
Glass fiber, metal fiber and the like are used, phenol resin is used as a binder, and graphite, barium sulfate, calcium carbonate, metal powder and the like are used as a filler.
【０００４】[0004]
【発明が解決しようとする問題点】しかしながら、上記
のようなアルミ合金をマトリックスとし、補強材として
セラミック材による粒子やウイスカー等を使用したロー
ターやドラム等に、上記のような従来の非石綿系摩擦材
を適用した場合、効きの低下が生じたり、摩擦材の摩耗
や対面攻撃性等の点で問題を生ずる場合が多い。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, the above-mentioned conventional non-asbestos-based materials are used for rotors, drums, etc., which use particles of the above-mentioned aluminum alloy as a matrix and particles of ceramic material or whiskers as a reinforcing material. When a friction material is applied, the effectiveness is often reduced, and problems such as abrasion of the friction material and face-to-face aggression often occur.
【０００５】これは、ローターやドラム等に補強材とし
て含まれる上記炭化ケイ素（ＳｉＣ）、アルミナ（Ａｌ
2Ｏ3）、酸化ケイ素（ＳｉＯ2）、酸化ジルコニウム
（ＺｒＯ2）や酸化マグネシウム（ＭｇＯ）等のセラミ
ック材による粒子やウイスカー等が一種のアブレシブと
なり、摩擦材を研削してしまう結果、摩耗粉がローター
やドラム等に付着し、効きの低下等をひきおこすためと
考えられるのである。This is because the above-mentioned silicon carbide (SiC), alumina (Al
2 O 3 ), silicon oxide (SiO 2 ), zirconium oxide (ZrO 2 ), magnesium oxide (MgO) and other ceramic material particles and whiskers become a kind of abrasive, resulting in grinding of friction materials, resulting in abrasion powder. It is thought that this is because it adheres to the rotor, drum, etc., and causes a decrease in effectiveness.
【０００６】本発明は、上述した従来技術の難点を解消
し、特にローターやドラム等の対面が、主として適宜の
硬質素材により補強されたアルミ合金よりなるもの、例
えばアルミ合金をマトリックスとし、各種セラミック材
により補強されているものと組み合わせることにより、
優れた効き及び耐摩耗性を発揮すると共に対面攻撃性に
優れる非石綿系摩擦材を提供することを目的としてなさ
れた。The present invention solves the above-mentioned disadvantages of the prior art, and in particular, the facing surfaces of the rotor, drum, etc. are mainly made of an aluminum alloy reinforced by an appropriate hard material, for example, aluminum alloy is used as a matrix, and various ceramics are used. By combining with those reinforced by materials,
The purpose of the present invention is to provide a non-asbestos-based friction material that exhibits excellent effectiveness and wear resistance and is excellent in face-to-face attack.
【０００７】[0007]
【問題点をを解決するための手段】上記目的を達成する
ために本発明が採用した構成は、主として適宜の硬質素
材により補強されたアルミ合金よりなるローターやドラ
ム等と組み合わせて使用される摩擦材であって、モース
硬度が６以上の硬質無機材料を含有させてなることを特
徴とするものである。[Means for Solving the Problems] The structure adopted by the present invention to achieve the above object is mainly used in combination with a rotor or a drum made of an aluminum alloy reinforced by an appropriate hard material. The material is characterized by containing a hard inorganic material having a Mohs hardness of 6 or more.
【０００８】以下、本発明を詳細に説明する。The present invention will be described in detail below.
【０００９】本発明で使用する硬質無機材料は、モース
硬度が６以上、好ましくは８以上のものであって、これ
は、前記のようなアルミ合金製ローターやアルミ合金製
ドラム等に含まれる補強材としての硬質素材の硬度が、
一般的にモース硬度６以上のものが多く、摩擦材の成分
としてそれ以上の硬度をもつ材料を使用する必要がある
ためである。The hard inorganic material used in the present invention has a Mohs hardness of 6 or more, preferably 8 or more, which is a reinforcement contained in the above-mentioned aluminum alloy rotor or aluminum alloy drum. The hardness of the hard material as a material,
This is because, in general, Mohs hardness is 6 or more in many cases, and it is necessary to use a material having hardness higher than that as a component of the friction material.
【００１０】上記硬質無機材料としては、具体的には炭
化ケイ素（ＳｉＣ）等の金属炭化物、アルミナ（Ａｌ2
Ｏ3）、酸化ケイ素（ＳｉＯ2）、酸化ジルコニウム（Ｚ
ｒＯ2）や酸化マグネシウム（ＭｇＯ）等によるセラミ
ック材の他、これらの二成分以上からなるセラミック
材、各種金属間化合物や、ニッケル−クロム合金等の硬
質金属等であって、モース硬度が６以上のものを例示す
ることができる。Specific examples of the hard inorganic material include metal carbides such as silicon carbide (SiC) and alumina (Al 2
O 3 ), silicon oxide (SiO 2 ), zirconium oxide (Z
In addition to ceramic materials such as rO 2 ) and magnesium oxide (MgO), ceramic materials composed of two or more of these components, various intermetallic compounds, hard metals such as nickel-chromium alloys, and Mohs hardness of 6 or more. Can be illustrated.
【００１１】上記硬質無機材料の形状としては、粉末、
粒子、繊維等から適宜選択することができ、異なる形状
のものを複数組み合わせることもできる。The shape of the above-mentioned hard inorganic material is powder,
It can be appropriately selected from particles, fibers and the like, and a plurality of particles having different shapes can be combined.
【００１２】この硬質無機材料の大きさとしては、粉末
や粒子状のものの場合で０．２μｍ〜２５０μｍ程度が
好ましい。これは、０．２μｍ以下の場合は、材料とし
てのアブレシブ性が低いため、目的とする効果を得るこ
とができず、又、２５０μｍ以上の場合では、逆にアブ
レシブ性が強すぎ、ローターやドラム等ののマトリック
ス成分であるアルミ合金を研削し、対面攻撃性の点で不
具合を生ずる場合があるからである。The size of this hard inorganic material is preferably about 0.2 μm to 250 μm in the case of powder or particles. This is because when the thickness is 0.2 μm or less, the abrasiveness as a material is low, and the desired effect cannot be obtained. On the other hand, when the thickness is 250 μm or more, the abrasiveness is too strong, and the rotor or the drum is not. This is because the aluminum alloy, which is a matrix component of, etc., may be ground and a problem may occur in terms of face-to-face aggression.
【００１３】又、繊維状の硬質無機材料の場合も、同様
の理由で繊維径が０．１〜１００μｍ、長さ１μ〜５ｍ
ｍ程度のものが好ましい。In the case of a fibrous hard inorganic material, the fiber diameter is 0.1 to 100 μm and the length is 1 μ to 5 m for the same reason.
It is preferably about m.
【００１４】一方、上記硬質無機材料の添加量は、実用
上からは０．１〜３０体積％程度が望ましく、これは、
０．１％以下の場合は目的とする効果を得ることができ
ず、又、３０％以上の場合は対面攻撃性が大きくなる可
能性があるためである。On the other hand, the amount of the hard inorganic material added is preferably about 0.1 to 30% by volume from a practical point of view.
This is because if it is 0.1% or less, the desired effect cannot be obtained, and if it is 30% or more, the face-to-face aggression may increase.
【００１５】尚、本発明摩擦材における上記硬質無機材
料の硬度、形状、大きさや添加量は、相手材であるロー
ターやドラム等に含まれる補強材の硬度、形状、大きさ
や添加量等に応じて任意に選択することができる。The hardness, shape, size and amount of addition of the above-mentioned hard inorganic material in the friction material of the present invention depend on the hardness, shape, size and amount of addition of the reinforcing material contained in the rotor, drum or the like as the mating material. Can be arbitrarily selected.
【００１６】本発明摩擦材は、上記のような硬質無機材
料を含有することに主たる特徴があり、その他の成分、
例えば結合材や充填材には従来品と同様の成分を同様に
配合することができ、従来品と同様の方法により製造す
ることができる。The friction material of the present invention is mainly characterized by containing the above-mentioned hard inorganic material, and other components,
For example, the binder and the filler can be blended with the same components as in the conventional product in the same manner, and can be manufactured by the same method as in the conventional product.
【００１７】[0017]
【発明の作用及び効果】本発明の非石綿系摩擦材は、主
として適宜の硬質素材により補強されたアルミ合金より
なるローターやドラム等と組み合わせて使用される摩擦
材であって、モース硬度が６以上の硬質無機材料を含有
させてなるものであるから、特にローターやドラム等の
対面が、主として適宜の硬質素材により補強されたアル
ミ合金よりなるものと組み合わせることにより、優れた
効き及び耐摩耗性を発揮すると共に対面攻撃性に優れる
ものである。The non-asbestos friction material of the present invention is a friction material mainly used in combination with a rotor, a drum or the like made of an aluminum alloy reinforced by a suitable hard material and having a Mohs hardness of 6 Since it contains the above hard inorganic material, especially facing the rotor, drum, etc., by combining with an alloy mainly made of an aluminum alloy reinforced by a suitable hard material, excellent efficacy and wear resistance It exhibits excellent face-to-face aggression.
【００１８】次に本発明を実施例により説明する。Next, the present invention will be described with reference to examples.
【００１９】[0019]
【実施例】以下に示す製造条件により、実施例及び比較
例の非石綿系摩擦材を製造した。 予備成形：室温、面圧４００ｋｇ／ｃｍ2 熱プレス：温度１５０℃ 圧力４００ｋｇ／ｃｍ2 １
０分加熱加圧 熱処理 ：１８０℃ ５時間[Examples] Non-asbestos-based friction materials of Examples and Comparative Examples were manufactured under the following manufacturing conditions. Preforming: room temperature, surface pressure 400 kg / cm 2 hot press: temperature 150 ° C. pressure 400 kg / cm 2 1
0 minutes heating and pressing Heat treatment: 180 ° C for 5 hours
【００２０】得られた摩擦材につき、以下に示す条件に
よりフルサイズダイナモによる摩擦試験を行った。 測定方法：ＪＡＳＯ Ｃ４２７−８３ Ｉ＝５ｋｇｍｓ
2 ローター材：マトリックス アルミ合金 ＪＩＳ ＡＣ
８Ｂ 補強材：ＳｉＣ粒子 １５μｍ ２０体積％ 結果を表１に示す。The friction material thus obtained was subjected to a friction test with a full size dynamo under the following conditions. Measurement method: JASO C427-83 I = 5 kgms
2 Rotor material: Matrix Aluminum alloy JIS AC
8B Reinforcement material: SiC particles 15 μm 20% by volume The results are shown in Table 1.
【００２１】[0021]
【表１】 [Table 1]
【００２２】表１から明らかなように、上記硬質無機材
料を含有する本発明の摩擦材は、広い温度範囲にわたっ
て優れた効き及び耐摩耗性を発揮し、対面攻撃性にも優
れていたが、比較例の摩擦材は、効き及び耐摩耗性が良
好ではなく、対面により研削されてしまった。As is clear from Table 1, the friction material of the present invention containing the above-mentioned hard inorganic material exhibited excellent effectiveness and wear resistance over a wide temperature range, and was also excellent in face-to-face attack. The friction material of the comparative example was not good in effectiveness and wear resistance, and was ground by facing each other.
Claims (6)
たアルミ合金よりなるローターやドラム等と組み合わせ
て使用される摩擦材であって、 モース硬度が６以上の硬質無機材料を含有させてなるこ
とを特徴とする非石綿系摩擦材。1. A friction material mainly used in combination with a rotor or a drum made of an aluminum alloy reinforced by an appropriate hard material, which contains a hard inorganic material having a Mohs hardness of 6 or more. Characteristic non-asbestos friction material.
ものである請求項１に記載の非石綿系摩擦材。2. The non-asbestos friction material according to claim 1, wherein the hard inorganic material has a Mohs hardness of 8 or more.
積％である請求項１に記載の非石綿系摩擦材。3. The non-asbestos-based friction material according to claim 1, wherein the addition amount of the hard inorganic material is 0.1 to 30% by volume.
形状を有するものである請求項１に記載の非石綿系摩擦
材。4. The non-asbestos-based friction material according to claim 1, wherein the hard inorganic material has a shape of powder, particles, fibers or the like.
０μｍの粉末又は粒子である請求項４に記載の非石綿系
摩擦材。5. The hard inorganic material has a particle size of 0.2 μm to 25 μm.
The non-asbestos-based friction material according to claim 4, wherein the non-asbestos-based friction material is powder or particles of 0 μm.
０μｍ、長さ１μｍ〜５ｍｍの繊維である請求項４に記
載の非石綿系摩擦材。6. The hard inorganic material has a diameter of 0.1 μm to 10 μm.
The non-asbestos-based friction material according to claim 4, which is a fiber having a length of 0 μm and a length of 1 μm to 5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04207993A JP3784842B2 (en) | 1993-02-05 | 1993-02-05 | Non-asbestos friction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04207993A JP3784842B2 (en) | 1993-02-05 | 1993-02-05 | Non-asbestos friction material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06228539A true JPH06228539A (en) | 1994-08-16 |
| JP3784842B2 JP3784842B2 (en) | 2006-06-14 |
Family
ID=12626051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04207993A Expired - Fee Related JP3784842B2 (en) | 1993-02-05 | 1993-02-05 | Non-asbestos friction material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3784842B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5712029A (en) * | 1994-04-28 | 1998-01-27 | Nisshinbo Industries, Inc. | Friction material |
| EP1233203A1 (en) | 2001-02-20 | 2002-08-21 | Nisshinbo Industries, Inc. | Non-asbestos friction material |
| US6620860B2 (en) | 2000-03-31 | 2003-09-16 | Sumitomo Electric Industries, Ltd. | Friction material |
-
1993
- 1993-02-05 JP JP04207993A patent/JP3784842B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5712029A (en) * | 1994-04-28 | 1998-01-27 | Nisshinbo Industries, Inc. | Friction material |
| US6620860B2 (en) | 2000-03-31 | 2003-09-16 | Sumitomo Electric Industries, Ltd. | Friction material |
| EP1233203A1 (en) | 2001-02-20 | 2002-08-21 | Nisshinbo Industries, Inc. | Non-asbestos friction material |
| US6656240B2 (en) | 2001-02-20 | 2003-12-02 | Nisshinbo Industries, Inc. | Non-asbestos friction material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3784842B2 (en) | 2006-06-14 |
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