GRAPHITE FOR FRICTION · Synthetic graphite: Q809 Artificial Q813 Artificial Natural graphite:...
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GRAPHITE FOR FRICTION Contact: Graphit Kropfmühl / AMG Mining AG Langheinrichstr. 1 94051 Hauzenberg Germany Tel.: +49 8586 609-178 Fax: +49 8586 609-112 [email protected] www.gk-graphite.com Specifications Due to the following versatile properties, graphite is used willingly in the friction industry: Friction coefficient: increasing graphite content brings down the friction coefficient Thermal conductivity: reduction of “Hot Spots” Lubricating properties: filling and smoothing of unevenness Plastic formability: balancing of unevenness on coat and disc The main objective of using graphite is to transform kinetic energy into heat in brake linings and for torque transition in clutch linings. The different compositions in the respective brake lining must be mixed homogeneously. The graphite film, applied by the friction, will be removed by the rough petroleum coke. This interaction then leads to the appropriate braking effect. Advantages of graphite in friction Reduction of braking noise and wear Encouragement of braking comfort Improvement of friction coefficient Parting agent in welding process Resistance to oxidation and cyclic temperature stress Graphit Kropfmühl Graphite is a central material in the friction industry, especially in the production of brake and clutch linings. With its lubricating properties, graphite modulates the braking effect of friction linings and essentially contributes to braking comfort and to noise reduction. The outstanding thermal conductivity properties of graphite also play an important role in friction linings. The main fields of application are the automotive sector and rail range (e.g. brake and clutch linings) as well as multilayered applications in the industry (e.g. sinter surfaces). A member of Advanced Metallurgical Group N.V.
Transcript of GRAPHITE FOR FRICTION · Synthetic graphite: Q809 Artificial Q813 Artificial Natural graphite:...
G R A P H I T E F O R F R I C T I O N
Contact:Graphit Kropfmühl /
AMG Mining AGLangheinrichstr. 1
94051 HauzenbergGermany
Tel.: +49 8586 609-178Fax: +49 8586 609-112
Specifications
Due to the following versatile properties, graphite is used willingly in the friction industry:
Friction coefficient: increasing graphite content brings down the friction coefficient
Thermal conductivity: reduction of “Hot Spots”
Lubricating properties: filling and smoothing of unevenness
Plastic formability: balancing of unevenness on coat and disc
The main objective of using graphite is to transform kinetic energy into heat in brake linings and for torque transition in clutch linings. The different compositions in the respective brake lining must be mixed homogeneously. The graphite film, applied by the friction, will be removed by the rough petroleum coke. This interaction then leads to the appropriate braking effect.
Advantages of graphite in friction
Reduction of braking noise and wear
Encouragement of braking comfort
Improvement of friction coefficient
Parting agent in welding process
Resistance to oxidation and cyclic temperature stress
Graphit Kropfmühl
Graphite is a central material in the friction industry, especially in the production of brake and clutch linings. With its lubricating properties, graphite modulates the braking effect of friction linings and essentially contributes to braking comfort and to noise reduction. The outstanding thermal conductivity properties of graphite also play an important role in friction linings. The main fields of application are the automotive sector and rail range (e.g. brake and clutch linings) as well as multilayered applications in the industry (e.g. sinter surfaces).
A member of Advanced Metallurgical Group N.V.
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Graphit Kropfmuehl / AMG Mining AG
Graphit Kropfmuehl / AMG Mining AG has more than 140 years of tradition and expertise in graphite. With our permanent will to create, market proximity and absolute customer orientation we have become a trend-setting graphite refiner. On the basis of state-of-the-art, quality-conscious high-technology and in an intensive dialogue with customers and partners, we develop high-quality special products.
In order to secure the supply of raw materials we hold shares in mines located in Europe, Africa and Asia. Our leading position as an internationally operating, listed graphite specialist is both motivation and obligation. Extensive research and development work guarantees a permanent optimisation of our product range and allows us to fulfil specific customer wishes.
The GK Group of companies is certified according to ISO 9001.
Our product range for your individual requirements
References
Brake / Clutch system
Organic or
resinbonded
brake and clutch
linings (automotive
sector, rail range)
Sintered metal
brake linings
Based on carbon
GK graphite grade
Natural graphite:
KP 90/92 Crystal powder
MFL 87/90 Medium flake
MFL 90/92 Medium flake
GP 90/92 Shiny powder
Synthetic graphite:
Q809 Artificial
Q813 Artificial
Natural graphite:
UF4 99,5 Ultra fine grinding
FP 96/97 Fine powder
Natural graphite:
UF2 99,9 Ultra fine grinding
www.gk-graphite.com
Particle size
max. 10 % > 160 µm
min. 70 % > 160 µmmin. 20 % > 315 µm
min. 70 % > 160 µmmin. 20 % > 315 µm
max. 5 % > 100 µm
min. 4 % > 150 µmmin. 16 % > 45 µmmax. 80 % < 45 µm
min. 5 % > 840 µm min. 25 - 45 % > 425 µm min. 35 - 55 % > 150 µm
-max. 5 20 % < 150 µm
d90 = 15 µm; d50 5,5 - 7µm
max. 10 % > 71 µm
d90 = 12 µm; d50 4 - 5,5 µm
Contact:Graphit Kropfmühl /
AMG Mining AGLangheinrichstr. 1
94051 HauzenbergGermany
Tel.: +49 8586 609-178Fax: +49 8586 609-112
A member of Advanced Metallurgical Group N.V.
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