Classifications

• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M7/00—Solid or semi-solid compositions essentially based on lubricating components other than mineral lubricating oils or fatty oils and their use as lubricants; Use as lubricants of single solid or semi-solid substances
• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
  • C01G39/00—Compounds of molybdenum
  • C01G39/06—Sulfides
• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
  • C01G41/00—Compounds of tungsten
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
  • C10M2201/06—Metal compounds
  • C10M2201/065—Sulfides; Selenides; Tellurides
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
  • C10M2201/06—Metal compounds
  • C10M2201/065—Sulfides; Selenides; Tellurides
  • C10M2201/066—Molybdenum sulfide
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
  • C10N2050/08—Solids
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
  • C10N2050/10—Form in which the lubricant is applied to the material being lubricated semi-solid; greasy
• • 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
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
  • F16C33/02—Parts of sliding-contact bearings
  • F16C33/04—Brasses; Bushes; Linings
  • F16C33/06—Sliding surface mainly made of metal
  • F16C33/10—Construction relative to lubrication
  • F16C33/1095—Construction relative to lubrication with solids as lubricant, e.g. dry coatings, powder

Definitions

• This invention relates to laminated metallic lubricating agents and more particularly to a method for substantially improving the wear rates of laminated metallic lubricating agents and the manufacture of a compacted body of such improved lubricating agents.
• Certain inorganic compounds i.e., the sulphides, disulphides, se lenides and tellurides of such metals as molybdenum, tungsten, titanium and uranium are characterized by a laminated or plate-like crystal structure in which the metallic atoms are attached to each other in a single common plane while the non-metallic atoms are attached to the metallic atoms to form layers on both sides of this plane.
• the non-metallic atoms in each of the several crystals thus formed have very little attraction for each other so that these crystals will slip readily with response to each other under the action of low shearing forces.
• non-metallic atoms have an affinity for adjacent metal surfaces so that the crystals attached to such surfaces will exhibit very strong resistance to the action of forces normal to the direction of shear. Consequently, these compounds have excellent lubricating properties and also have excellent anti-seizing properties.
• This object may be achieved by exposing the lamellar metal compound lubricant to a mixed gaseous atmosphere of hydrogen sulfide and an inert gas, as for example nitrogen, in about equal volumes.
• microsize is a sizing designation employed in industry to indicate that most of the particles in material so designated have a size ranging from about 1 to about 2 microns.
• the tests were carried on at room temperature and relative humidity (about 23-25 C. and about 55 percent, respectively) in room air.
• the molybdenum (or tungsten) disulfide material being treated is exposed at atmospheric pressure and about room temperature to a mixture of about equal quantities of H 8 and N for a period of about 2 hours.
• nitrogen which functions primarily as a diluent or carrying agent for the hydrogen sulfide
• other inert gases as for example carbon dioxide or helium, could be employed. If, however, the inert gas is completely eliminated, the Wear rate has been found, quite unexpectedly, to increase in value to at least about the value obtained for the untreated lubricant pellet.
• atmospheric pressure is exemplary, this treatment can be accomplished at subatmospheric or superatmospheric pressures, if desired. Likewise, temperature is not critical.
• both the hydrogen disulfide and the inert diluent should be as dry as possible.
• the rate of flow is not critical and, if a mixture is used, it is preferred that the mixture comprise about equal quantities of hydrogen sulfide and diluent gas, If desired, pellets may be prepared of combined treated particles of both molybdenum disulfide and tungsten disulfide.
• Table I presents examples of the wear rate for treated molybdenum disulfide pellets.
• Examples 2, 3, 4, 6 and 8 reflect the performance of pellets treated with H 8 and N or H S alone, as described hereinabove in the form of microsize particles, which particles were later consolidated into pellets.
• Examples 1, and 7 are included to provide a clear basis for comparison. The tests varied in length from about 15 to about 54 hours.
• Microsize particles of tungsten disulfide were treated for about 2 hours with H 5 and N as described hereinabove, compacted into pellets and tested over. a period of about 20 hours on bright copper. Although the results obtained on test were not as spectacular as in the case of molybdenum disulfide, a reduction in the wear rate of more than 40% was obtained.
• Applicant has, accordingly, discovered a novel method for quickly and effectively treating lamellar metal compound lubricants, particularly M05 and W5 to reduce the wear rate of the untreated material and for preparing useful compacted bodies of these solid lubricants so treated.
• a method for preparing a compacted body of laminated metalliclubricating material having a greatly reduced wear rate comprising the stepsrof:
• said inert gas being present in an amount ranging from a maximumof about percent by volume to a volume effective to substantially reduce the wear rate of a pellet produced from said particles after treatment with said mixture as compared to a similar pel-let produced from said particleswithout said treatment, and

Landscapes

• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Inorganic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Powder Metallurgy (AREA)
• Lubricants (AREA)

Priority Applications (3)

Applications Claiming Priority (1)

Publications (1)

Family

ID=23437799

Family Applications (1)

Country Status (3)

Cited By (2)

Citations (6)

• 1964
  • 1964-05-05 US US365182A patent/US3301780A/en not_active Expired - Lifetime
• 1965
  • 1965-04-07 GB GB14832/65A patent/GB1074864A/en not_active Expired
  • 1965-05-04 DE DEG43501A patent/DE1278057B/de active Pending

Patent Citations (6)

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