Transcript Titel - LATEST RELEASES

Solid Lubricants as Problem Solver for
Industrial Applications
Dr. Manfred Jungk
DOW CORNING GMBH,
Rheingaustr. 34, D- 65201 Wiesbaden, GERMANY
Smart Lubrication™
© 2007 Dow Corning, All rights reserved
3rd International Conference Lubricants Russia - 2007 Moscow 29nov07
Dow Corning
• A global solution provider and the leading technology
pioneer in silicon-based material science.
• Shares equally owned by The Dow Chemical
Company and Corning Incorporated, established in
1943
7,000: Products and services
25,000: Customers
$4.39 billion: 2006 sales (USD)
60: % of sales outside the U.S.
9,100: # of employees worldwide
1,000+: # of scientists and engineers
4,600: Active patents worldwide
6: % of annual sales revenue used for research
Smart Lubrication™
© 2007 Dow Corning, All rights reserved
3rd International Conference Lubricants Russia - 2007 Moscow 29nov07
MOLYKOTE®
• We’re experts in lubrication, solving and preventing
customer problems.
• For over 60 years customers worldwide have trusted our
products and our people to help them work smarter, safer,
and more successfully.
• A complete line of multi-purpose oils, synthetic and ultrahigh-purity mineral-oil fluids, specialty compounds, greases,
pastes, anti-friction coatings.
• Offer comprehensive set of services and solutions to
compliment key lubrication needs.
• Backed by the innovative heritage of Dow Corning.
Smart Lubrication™
© 2007 Dow Corning, All rights reserved
3rd International Conference Lubricants Russia - 2007 Moscow 29nov07
R = sum of both surfaces’ roughness
L = lubricating film thickness
Boundary Friction
L/R<1
Mixed Friction
Fluid Friction
1<L/R<5
L/R>5
Contribution of
Solid Lubricant
Operating Regime of Solid Lubricants
Smart Lubrication™
© 2007 Dow Corning, All rights reserved
3rd International Conference Lubricants Russia - 2007 Moscow 29nov07
Avoidance
of seizure
Shock
loads
Intermittent
movement
Press
fitting
Severe Industrial Conditions
Smart Lubrication™
© 2007 Dow Corning, All rights reserved
3rd International Conference Lubricants Russia - 2007 Moscow 29nov07
• Sulfides from Molybdenium, Zink, Tin, Lead, Tungsten,
Antimony
• Phosphates from Calcium and others
• Flourides from Calcium and others
• Oxides from Zirconium and others
• Graphite
• Metal powders such as Copper, Tin, Nickel, Brass and others
• Thermoplastics such as PolyEthylene, PolyTetraFlouroEthylene
and others
Chemical substances used as Solid Lubricants
Smart Lubrication™
© 2007 Dow Corning, All rights reserved
3rd International Conference Lubricants Russia - 2007 Moscow 29nov07
Lamellar structure of MoS2
Smart Lubrication™
© 2007 Dow Corning, All rights reserved
3rd International Conference Lubricants Russia - 2007 Moscow 29nov07
Test machine:
block on ring
Synergistic effects of three solid lubricants
Smart Lubrication™
© 2007 Dow Corning, All rights reserved
3rd International Conference Lubricants Russia - 2007 Moscow 29nov07
New generation: Polarized Graphite
Smart Lubrication™
© 2007 Dow Corning, All rights reserved
3rd International Conference Lubricants Russia - 2007 Moscow 29nov07
• Molybdeniumdisulfide MoS2
–
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Different average particle size
Good adhesion to metal
Used when oil or coating is not desirable
Burnishes with time/load
• Solid lubricant mixtures
– Used for compounding
•
•
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Shims for tire molds
Carbon brushes
Designed plastics
Brake pads
• Brake Pads
– composition
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Fiber
Resin
Abrasive
Filler
Lubricant
– Advantage of Solid Lubricant
• Stabilization of friction coefficient, comfort
• Reduction of disk wear, judder
• Noise reduction
Product Form: Powder
Smart Lubrication™
© 2007 Dow Corning, All rights reserved
3rd International Conference Lubricants Russia - 2007 Moscow 29nov07
• High concentrated dispersion as oil additive
– Industrial gear oils
– 2-stroke motor cycle gear oils
– Oils for Diesel engines without particulate filter
system
• Ready to use dispersions
– Specialized metal forming applications
– With white solid lubricant packages to prevent fretting
– For high temperature chain applications where
synthetic oil carrier evaporates
Product Form: Dispersion
Smart Lubrication™
© 2007 Dow Corning, All rights reserved
3rd International Conference Lubricants Russia - 2007 Moscow 29nov07
• Usually contain around 3% of
solid lubricant
• Advantage over chemically active
EP-additives
• Examples:
– Steel Industry
– Constant Velocity
Joints
– Ball Joints
Product Form: Grease
Smart Lubrication™
© 2007 Dow Corning, All rights reserved
3rd International Conference Lubricants Russia - 2007 Moscow 29nov07
3 Types of Pastes
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Thread Pastes
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Friction Coefficient around 0.1 (in most manuals) with low variation
Disassembly possible after long period of time
Ultra high temperature capability
Compatibility with high strength alloys- ultra pure for turbine applications
Assembly Pastes
–
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Prevention of fretting corrosion
Damage free disassembly, e.g. bearing from shaft
Low coefficient of friction
Corrosion protection
Lubricating Pastes
–
–
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Generally considered “Grease-Pastes”
Long term lubrication
Good adhesion
Corrosion protection
Temperature resistance
Product Form: Paste
Smart Lubrication™
© 2007 Dow Corning, All rights reserved
3rd International Conference Lubricants Russia - 2007 Moscow 29nov07
Solid Lubricant is bonded to the surface – “lubricating paint”
•
Composition
•
Application methods – depends on geometry of the to be coated part
•
Properties of applied film
–
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Resin system depends on desired cure method and media resistance
Carrier fluid are various Volatile Organics or water
Paint additives to enhance film forming properties
Solid lubricant packages for wear and friction reduction
Corrosion protective additives
Spraying
Printing
Dip-spin
Electro deposition
Long lasting, wear resistant
No need for additional liquid lubrication in most cases
Corrosion protection
Reduction of stick slip
Reduction of friction as desired
Product Form: Anti-friction Coating
Smart Lubrication™
© 2007 Dow Corning, All rights reserved
3rd International Conference Lubricants Russia - 2007 Moscow 29nov07
Compressed overview on Solid Lubricants to master
Tribological challenges
Thank you very much for your kind
attention !
Smart Lubrication™
© 2007 Dow Corning, All rights reserved
3rd International Conference Lubricants Russia - 2007 Moscow 29nov07