JPH04231739A - Brake sliding part - Google Patents
Brake sliding partInfo
- Publication number
- JPH04231739A JPH04231739A JP40881290A JP40881290A JPH04231739A JP H04231739 A JPH04231739 A JP H04231739A JP 40881290 A JP40881290 A JP 40881290A JP 40881290 A JP40881290 A JP 40881290A JP H04231739 A JPH04231739 A JP H04231739A
- Authority
- JP
- Japan
- Prior art keywords
- pad
- disc
- hardness
- sliding part
- carbon fiber
- 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 claims abstract description 55
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 20
- 239000004917 carbon fiber Substances 0.000 claims abstract description 20
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 8
- 239000000835 fiber Substances 0.000 claims abstract description 8
- 239000002131 composite material Substances 0.000 claims description 20
- 230000002787 reinforcement Effects 0.000 abstract description 2
- 239000012779 reinforcing material Substances 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 14
- 238000010304 firing Methods 0.000 description 9
- 238000000280 densification Methods 0.000 description 8
- 239000005011 phenolic resin Substances 0.000 description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 239000007789 gas Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000002296 pyrolytic carbon Substances 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 3
- 150000008282 halocarbons Chemical class 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 229920001568 phenolic resin Polymers 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 229910018404 Al2 O3 Inorganic materials 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005087 graphitization Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 229910003465 moissanite Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- -1 pitch-based Chemical compound 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は摩擦，摺動特性に優れた
炭素繊維強化炭素複合材（以下、Ｃ／Ｃ複合材という）
製のブレーキ摺動部に関するものである。[Industrial Application Field] The present invention is a carbon fiber-reinforced carbon composite material (hereinafter referred to as C/C composite material) with excellent friction and sliding properties.
This relates to the brake sliding part made by the company.
【０００２】0002
【従来の技術】従来、自動車用及び自動２輪用のブレー
キ材としては金属製ブレーキ材が多く用いられてきたが
、近年、その優れた耐摩耗性，耐熱性，耐酸化性，軽量
性によりＣ／Ｃ複合材がブレーキ材として使用されてき
ている。[Prior Art] Conventionally, metal brake materials have been widely used as brake materials for automobiles and motorcycles, but in recent years, metal brake materials have been widely used due to their excellent wear resistance, heat resistance, oxidation resistance, and light weight. C/C composites have been used as brake materials.
【０００３】0003
【発明が解決しようとする課題】しかしながら、Ｃ／Ｃ
複合材においては、温度により摩擦係数が変動し、摩擦
開始の直後、即ち低温（１００℃以下）において摩擦係
数が低く（トルク値が小さく）、その後摩擦の進行で温
度が上昇すると共に摩擦係数が徐々に又は急激に高く（
トルク値が大きく）なるいわゆる２段トルク波形現象が
起ったり、又は、２段波形とはならないが、摩擦係数が
低い状態のままであるという現象が起っていた。[Problem to be solved by the invention] However, C/C
In composite materials, the coefficient of friction changes depending on the temperature. Immediately after the start of friction, that is, at low temperatures (below 100°C), the coefficient of friction is low (the torque value is small), and then as the temperature increases as friction progresses, the coefficient of friction decreases. gradually or suddenly increases (
A so-called two-stage torque waveform phenomenon occurs in which the torque value increases), or a phenomenon in which the friction coefficient remains low although the two-stage waveform does not occur.
【０００４】従って安定した適切な摩擦係数を得るため
に、ブレーキをかける際ブレーキ材を保温したり、予め
軽くブレーキをかけ暖めておいたりして、２段波形又は
低摩擦係数を防ぐ必要があった。[0004] Therefore, in order to obtain a stable and appropriate coefficient of friction, it is necessary to keep the brake material warm before applying the brakes, or to warm up the brake material by lightly applying the brakes in advance to prevent a two-stage waveform or a low coefficient of friction. Ta.
【０００５】[0005]
【課題を解決するための手段】このような従来技術の課
題に鑑み、本発明者等は、Ｃ／Ｃ複合材製のブレーキ摺
動材について鋭意検討を重ねた結果、ディスク及びパッ
ドからなるブレーキ摺動部において、ディスク材及びパ
ッド材の硬度を、それぞれ特定のものとすることにより
、上記課題が解決できることを知得し本発明を完成する
に到った。[Means for Solving the Problems] In view of the problems of the prior art, the inventors of the present invention have conducted intensive studies on brake sliding materials made of C/C composite materials, and have developed a brake consisting of a disc and a pad. The present invention was completed based on the knowledge that the above problem can be solved by making the disk material and the pad material have specific hardness in the sliding portion.
【０００６】即ち、本発明の目的は、２段波形がなく、
かつ通常の運転条件で動摩擦係数が０．３以上すなわち
低摩擦係数ではなく、低温特性が優れたＣ／Ｃ複合材製
のブレーキ摺動部を提供することにあり、その要旨は、
ディスク材及びパッドからなるブレーキ摺動部において
、ディスク材及びパッド材はいずれも複数の単繊維の束
からなる短繊維状の炭素繊維を解繊したものを強化材と
する炭素繊維強化炭素複合材から構成され、ディスク材
をロックウェル硬度８０〜１２０ＨＲＰとし、パッド材
をロックウェル硬度５０〜１１０としてかつディスク材
のロックウェル硬度が、パッド材のロックウェル硬度よ
りも高いことを特徴とするブレーキ摺動部に存する。That is, an object of the present invention is to eliminate the two-stage waveform,
The object of the present invention is to provide a brake sliding part made of a C/C composite material that has a dynamic friction coefficient of 0.3 or more under normal operating conditions, that is, it does not have a low friction coefficient but has excellent low-temperature characteristics.
In the brake sliding part consisting of a disc material and a pad, both the disc material and the pad material are carbon fiber-reinforced carbon composite materials whose reinforcement material is fibrillated short carbon fibers made of bundles of multiple single fibers. A brake slide characterized in that the disc material has a Rockwell hardness of 80 to 120 HRP, the pad material has a Rockwell hardness of 50 to 110, and the Rockwell hardness of the disc material is higher than that of the pad material. Exists in moving parts.
【０００７】以下、本発明につき詳細に説明する。本発
明で用いる炭素繊維としては、ピッチ系、ＰＡＮ系ある
いはレーヨン系炭素繊維等の公知のいずれのものも使用
できる。更に必要に応じてＳｉＣ，Ａｌ２ Ｏ３ ，カ
ーボンブラックなどの無機繊維、無機物などを添加して
もよい。The present invention will be explained in detail below. As the carbon fiber used in the present invention, any known carbon fiber such as pitch-based, PAN-based, or rayon-based carbon fiber can be used. Furthermore, inorganic fibers and inorganic substances such as SiC, Al2 O3, and carbon black may be added as necessary.
【０００８】用いられる炭素繊維の形態としては、複数
の単繊維の束から成るトウ，ストランド，ロービング、
ヤーンなどの形態であり、これらをカッティングするこ
とにより得られる短繊維状のものを用いる。本発明にお
いては、通常０．３〜１００ｍｍ、好ましくは５〜５０
ｍｍ程度の短繊維を使用する。炭素繊維自体の径や弾性
率は、一般に複合材として用いられる範囲で特に限定は
されない。Ｃ／Ｃ複合材とする際に例えば特開昭６２−
９６３６４号、特開平１−１７６２７３号公報等に記載
の方法で解繊・分散してプリフォーム又はシートとする
。
これらにマトリックス材を含浸して金型に充填し、１０
０〜５００℃の温度で加圧成形してＶｆ （繊維含有量
）が５〜６５％、好ましくは１０〜５５％程度の成形体
を得る。その後、Ｎ２ ガスなどの不活性ガス雰囲気中
で１〜２００℃／ｈｒの昇温速度で８００〜２５００℃
まで昇温し、焼成してＣ／Ｃ複合材を得る。[0008] The forms of carbon fibers used include tows, strands, rovings, and
It is in the form of yarn, etc., and short fibers obtained by cutting these are used. In the present invention, the diameter is usually 0.3 to 100 mm, preferably 5 to 50 mm.
Use short fibers of about mm. The diameter and elastic modulus of the carbon fibers themselves are not particularly limited as long as they are generally used as composite materials. For example, when making a C/C composite material,
It is defibrated and dispersed to form a preform or sheet by the method described in JP-A No. 96364, JP-A-1-176273, and the like. These are impregnated with matrix material and filled into a mold.
Pressure molding is performed at a temperature of 0 to 500°C to obtain a molded product having a Vf (fiber content) of about 5 to 65%, preferably about 10 to 55%. Thereafter, the temperature was raised to 800 to 2500°C at a heating rate of 1 to 200°C/hr in an inert gas atmosphere such as N2 gas.
C/C composite material is obtained by raising the temperature to a temperature of 100.degree.
【０００９】前述の焼成によって得られたＣ／Ｃ複合材
を適宜、例えば熱硬化性樹脂、ピッチ、熱分解炭素の３
種のマトリックスを単独又は組み合わせることにより緻
密化処理を行い、目的のディスク材及びパッド材を得る
ことができる。[0009] The C/C composite material obtained by the above-mentioned firing is suitably treated with three materials, for example, thermosetting resin, pitch, and pyrolytic carbon.
The desired disk material and pad material can be obtained by performing a densification treatment using the seed matrix alone or in combination.
【００１０】（１）熱硬化性樹脂又はピッチによる緻密
化処理
所定温度に加熱された糟に前述のＣ／Ｃ複合材を積載し
、糟内を真空とした後熱硬化性樹脂、好ましくはフェノ
ール樹脂又は溶融ピッチを供給し、焼成により生じた空
隙にマトリックスを含侵する。この後再度８００〜２５
００℃の温度で焼成する。上記工程を繰り返すことによ
り目的のＣ／Ｃ複合材の緻密化処理を行う。(1) Densification treatment with thermosetting resin or pitch The above-mentioned C/C composite material is loaded on a clay pot heated to a predetermined temperature, and after the interior of the cage is evacuated, a thermosetting resin, preferably phenol is applied. A resin or molten pitch is supplied to impregnate the matrix into the voids created by firing. 800-25 again after this
Calcinate at a temperature of 00°C. By repeating the above steps, the target C/C composite material is densified.
【００１１】（２）ＣＶＤによる緻密化処理誘導加熱コ
イル等により反応器内に載置した上記Ｃ／Ｃ複合材を加
熱し、炭化水素類あるいはハロゲン化炭化水素類の蒸気
を、Ｈ２ ガス、Ａｒガス或いはＮ２ ガスと共に反応
器内に供給し、生成する熱分解炭素で空隙を含侵し、緻
密化する。さらに必要に応じて黒鉛化処理を行うことが
できる。(2) Densification treatment by CVD The above C/C composite material placed in a reactor is heated by an induction heating coil or the like, and the vapor of hydrocarbons or halogenated hydrocarbons is converted into H2 gas, Ar It is supplied into the reactor together with gas or N2 gas, and the generated pyrolytic carbon impregnates the voids and densifies them. Furthermore, graphitization treatment can be performed if necessary.
【００１２】本発明においては上記のようにしてディス
クパッドを得るに際して目的の硬度に収まるように焼成
温度、緻密化方法及び緻密化の程度を選択する。強化材
及びマトリックスの組合せにより一概には言えないが、
一般には焼成温度を高く、緻密化程度を低くする程硬度
は低くなる。In the present invention, when obtaining a disk pad as described above, the firing temperature, densification method, and degree of densification are selected so that the desired hardness is achieved. Although it cannot be generalized depending on the combination of reinforcing material and matrix,
Generally, the higher the firing temperature and the lower the degree of densification, the lower the hardness.
【００１３】このようにして本発明においては、ディス
ク材の硬度が８０〜１２０ＨＲＰ、より好ましくは９０
〜１１５ＨＲＰの範囲のＣ／Ｃ材をもちい、パッド材は
硬度が５０〜１１０ＨＲＰ、より好ましくは６５〜９５
ＨＲＰの範囲のＣ／Ｃ材を用い、さらにディスク材の硬
度がパッド材の硬度より高いものを用いる。ディスク材
の硬度がパッド材の硬度より５ＨＲＰ以上高いことがよ
り好ましい。In this way, in the present invention, the hardness of the disk material is 80 to 120 HRP, more preferably 90 HRP.
Using C/C material in the range of ~115 HRP, the pad material has a hardness of 50 to 110 HRP, more preferably 65 to 95.
A C/C material within the HRP range is used, and the hardness of the disk material is higher than that of the pad material. It is more preferable that the hardness of the disk material is 5 HRP or more higher than the hardness of the pad material.
【００１４】[0014]
【実施例】以下、本発明を実施例により具体的に説明す
るが、本発明はその要旨をこえない限り、下記実施例に
よって限定されるものではない。[Examples] The present invention will be explained in detail below using examples, but the present invention is not limited to the following examples unless the gist of the invention is exceeded.
【００１５】製造例１（実施例対応）長さ１０ｍｍ、フ
ィラメント数４０００のピッチ系炭素繊維７２５ｇをビ
ーターにて湿式解繊した後に、外筒３００ｍｍ、内筒１
２０ｍｍのドーナツ状の低部に網目１５０メッシュのス
クリーン及び更に外側に底板を有する成形用型に水と共
に投入し、均一に攪拌した後、底板を引き抜くことによ
り底部から一気に溶液全量を除去することにより、炭素
繊維が均一に分散したドーナツ状のプリフォームを得た
。Production Example 1 (corresponding to Examples) After wet-defibrating 725 g of pitch-based carbon fiber with a length of 10 mm and a number of filaments of 4000 using a beater, an outer cylinder of 300 mm and an inner cylinder of 1
By putting it together with water into a 20 mm donut-shaped mold having a 150 mesh screen at the bottom and a bottom plate on the outside, stirring evenly, and then removing the entire solution from the bottom at once by pulling out the bottom plate. A donut-shaped preform in which carbon fibers were uniformly dispersed was obtained.
【００１６】該プリフォームを乾燥した後にフェノール
樹脂とエタノールとの混合物３４００ｇを含浸し、６時
間７０℃で乾燥し、１３７０ｇのプリプレグとし、さら
に上記と同一内外径を有する金型内に納めて２５０℃の
温度で成形・硬化し炭素含有率（Ｖｆ ）５０％の成形
体を得た。この成形体を加熱炉で２０００℃迄焼成した
後、高周波誘導加熱装置により、５５０℃に加熱し、ハ
ロゲン化炭化水素蒸気を、窒素ガスをキャリアーガスと
して反応器内に導入して熱分解炭素により、気孔を充填
する緻密化処理を行なった。After drying the preform, it was impregnated with 3,400 g of a mixture of phenolic resin and ethanol, dried at 70° C. for 6 hours to obtain a prepreg weighing 1,370 g, and placed in a mold having the same inner and outer diameters as above. The molded product was molded and cured at a temperature of 50.degree. C. to obtain a molded product having a carbon content (Vf) of 50%. After firing this compact in a heating furnace to 2000°C, it was heated to 550°C using a high-frequency induction heating device, and halogenated hydrocarbon vapor was introduced into the reactor using nitrogen gas as a carrier gas to generate pyrolytic carbon. , a densification process was performed to fill the pores.
【００１７】次いで、フェノール樹脂を含浸した後、加
熱炉で１０００℃で焼成した。さらに同様の含浸−焼成
の操作を再度繰り返しその後に１７００℃の熱処理を行
なって気孔率１３％のディスク材用のＣ／Ｃ複合材を得
た。このもののロックウェル硬度は９８ＨＲＰであった
。[0017] Next, after being impregnated with phenol resin, it was fired at 1000°C in a heating furnace. Further, the same impregnation-firing operation was repeated again, and then heat treatment was performed at 1700°C to obtain a C/C composite material for a disk material having a porosity of 13%. The Rockwell hardness of this material was 98 HRP.
【００１８】製造例２（実施例対応）長さ１０ｍｍ、フ
ィラメント数４０００のピッチ系炭素繊維７２５ｇをビ
ーターにて湿式解繊した後に、外筒３００ｍｍ、内筒１
２０ｍｍのドーナツ状の低部に網目１５０メッシュのス
クリーン及び更に外側に底板を有する成形用型に水と共
に投入し、均一に攪拌した後、底板を引き抜くことによ
り底部から一気に溶液全量を除去することにより、炭素
繊維が均一に分散したドーナツ状のプリフォームを得た
。Production Example 2 (corresponding to the example) After wet defibrating 725 g of pitch-based carbon fiber with a length of 10 mm and a number of filaments of 4000 using a beater, an outer cylinder of 300 mm and an inner cylinder of 1
By putting it together with water into a 20 mm donut-shaped mold having a 150 mesh screen at the bottom and a bottom plate on the outside, stirring evenly, and then removing the entire solution from the bottom at once by pulling out the bottom plate. A donut-shaped preform in which carbon fibers were uniformly dispersed was obtained.
【００１９】該プリフォームを乾燥した後にフェノール
樹脂とエタノールとの混合物３４００ｇを含浸し、６時
間７０℃で乾燥し、１３７０ｇのプリプレグとし、さら
に上記と同一内外径を有する金型内に納めて２５０℃の
温度で成形・硬化し炭素含有率（Ｖｆ ）５０％の成形
体を得た。この成形体を加熱炉で２０００℃迄焼成した
後、高周波誘導加熱装置により、５５０℃に加熱し、ハ
ロゲン化炭化水素蒸気を、窒素ガスをキャリアーガスと
して反応器内に導入して熱分解炭素により、気孔を充填
する緻密化処理を行なった。After drying the preform, it was impregnated with 3,400 g of a mixture of phenolic resin and ethanol, dried at 70° C. for 6 hours to obtain a prepreg weighing 1,370 g, and then placed in a mold having the same inner and outer diameters as above to form a prepreg of 250 g. The molded product was molded and cured at a temperature of 50.degree. C. to obtain a molded product having a carbon content (Vf) of 50%. After firing this compact in a heating furnace to 2000°C, it was heated to 550°C using a high-frequency induction heating device, and halogenated hydrocarbon vapor was introduced into the reactor using nitrogen gas as a carrier gas to generate pyrolytic carbon. , a densification process was performed to fill the pores.
【００２０】次いで、フェノール樹脂を含浸した後、加
熱炉で１０００℃で焼成した。さらに同様の含浸−焼成
の操作を再度繰り返しその後に２０００℃の熱処理を行
なって気孔率１６％のパッド材用のＣ／Ｃ複合材を得た
。このもののロックウェル硬度は８３ＨＲＰであった。[0020] Next, after being impregnated with phenol resin, it was fired at 1000°C in a heating furnace. Further, the same impregnation-firing operation was repeated again, and then heat treatment was performed at 2000°C to obtain a C/C composite material for pad material having a porosity of 16%. The Rockwell hardness of this material was 83 HRP.
【００２１】製造例３（比較例対応）３０ｍｍ長に切断
したフィラメント数４０００のピッチ系炭素繊維をラン
ダムウェバーにて解繊し２次元ランダムに配向した目付
２００ｇ／ｍ２ のシートを得た。このシートにエタノ
ールで希釈したフェノール樹脂を含浸させた後、乾燥し
、２００ｇ／ｍ２ の炭素繊維に対し、１３０ｇ／ｍ２
のフェノール樹脂を含浸したシートを作製した。この
シートを金型内へ積層し、２５０℃にて加圧成形しＶｆ
≒５０％の成形体を得た。この成形体を加熱炉で２０
００℃迄焼成した。Production Example 3 (corresponding to Comparative Example) Pitch-based carbon fibers having 4000 filaments cut to a length of 30 mm were defibrated using a random webber to obtain a two-dimensionally randomly oriented sheet with a basis weight of 200 g/m 2 . After impregnating this sheet with phenol resin diluted with ethanol, it was dried and 130g/m2 was applied to 200g/m2 of carbon fiber.
A sheet impregnated with phenolic resin was prepared. This sheet was laminated into a mold and pressure-molded at 250°C to obtain a Vf
A molded body of ≒50% was obtained. This molded body was heated in a heating furnace for 20 minutes.
It was fired to 00°C.
【００２２】次いで、ピッチを含浸した後、加熱炉で１
０００℃で焼成した。その後にフェノール樹脂を含浸し
た後、加熱炉で１０００℃まで焼成した。さらにフェノ
ール樹脂の含浸−焼成の操作を再度繰り返し、その後に
２０００℃の熱処理を行って気孔率１２％のディスク材
用のＣ／Ｃ複合材を得た。このもののロックウェル硬度
は６２ＨＲＰであった。Next, after impregnating pitch, it is heated in a heating furnace for 1
It was fired at 000°C. After that, it was impregnated with phenol resin, and then fired in a heating furnace to 1000°C. Furthermore, the operation of impregnating with phenol resin and firing was repeated again, followed by heat treatment at 2000° C. to obtain a C/C composite material for a disk material having a porosity of 12%. The Rockwell hardness of this material was 62 HRP.
【００２３】試験例１
上記の製造例のディスク材用及びパッド材用のＣ／Ｃ複
合材を組み合わせたブレーキ摺動部の低温スタート時の
摩擦特性を評価した。その結果を表１に示す。Test Example 1 The friction characteristics at a low temperature start of a brake sliding part made of a combination of the C/C composite materials for the disk material and pad material of the above manufacturing example were evaluated. The results are shown in Table 1.
【００２４】[0024]
【発明の効果】本発明により、２段波形がなくかつ通常
の運転条件で摩擦係数が０．３以上という摩擦の低温特
性に優れたＣ／Ｃ複合材製のブレーキ摺動部を容易に得
ることができる。[Effects of the Invention] According to the present invention, it is easy to obtain a brake sliding part made of a C/C composite material that does not have two-step waveforms and has excellent low-temperature frictional characteristics such as a coefficient of friction of 0.3 or more under normal operating conditions. be able to.
【００２５】[0025]
【表１】[Table 1]
Claims (2)
摺動部において、ディスク材及びパッド材はいずれも複
数の単繊維の束からなる短繊維状の炭素繊維を解繊した
ものを強化材とする炭素繊維強化炭素複合材から構成さ
れ、ディスク材をロックウェル硬度８０〜１２０ＨＲＰ
とし、パッド材をロックウェル硬度５０〜１１０として
かつディスク材のロックウェル硬度が、パッド材のロッ
クウェル硬度よりも高いことを特徴とするブレーキ摺動
部。Claim 1: In a brake sliding part consisting of a disc and a pad, both the disc material and the pad material are made of carbon fibers reinforced with short carbon fibers made of bundles of a plurality of single fibers. Constructed from reinforced carbon composite material, the disc material has a Rockwell hardness of 80 to 120 HRP.
A brake sliding part characterized in that the pad material has a Rockwell hardness of 50 to 110, and the Rockwell hardness of the disk material is higher than that of the pad material.
０ｍｍの範囲である請求項１ 記載のブレーキ摺動部。Claim 2: The length of the carbon fiber before defibration is 0.3 to 10
The brake sliding part according to claim 1, wherein the brake sliding part is in the range of 0 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP40881290A JPH04231739A (en) | 1990-12-28 | 1990-12-28 | Brake sliding part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP40881290A JPH04231739A (en) | 1990-12-28 | 1990-12-28 | Brake sliding part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04231739A true JPH04231739A (en) | 1992-08-20 |
Family
ID=18518218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP40881290A Pending JPH04231739A (en) | 1990-12-28 | 1990-12-28 | Brake sliding part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04231739A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0710779A3 (en) * | 1994-10-25 | 1996-05-15 | Mitsubishi Chemical Corporation | Sliding unit for a brake and method of producing the same |
| US5803210A (en) * | 1994-12-28 | 1998-09-08 | Nippon Oil Co., Ltd. | Disk brakes |
-
1990
- 1990-12-28 JP JP40881290A patent/JPH04231739A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0710779A3 (en) * | 1994-10-25 | 1996-05-15 | Mitsubishi Chemical Corporation | Sliding unit for a brake and method of producing the same |
| US5803210A (en) * | 1994-12-28 | 1998-09-08 | Nippon Oil Co., Ltd. | Disk brakes |
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