Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
  • B21C23/00—Extruding metal; Impact extrusion
  • B21C23/32—Lubrication of metal being extruded or of dies, or the like, e.g. physical state of lubricant, location where lubricant is applied
• • 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
  • C10M173/00—Lubricating compositions containing more than 10% water
  • C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
• • 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
  • C10M2201/02—Water
• • 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
  • C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
• • 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
  • C10M2201/08—Inorganic acids or salts thereof
  • C10M2201/082—Inorganic acids or salts thereof containing nitrogen
  • C10M2201/083—Inorganic acids or salts thereof containing nitrogen nitrites
• • 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
  • C10M2201/085—Phosphorus oxides, acids or salts
• • 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
  • C10M2201/087—Boron oxides, acids or salts
• • 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
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
  • C10N2030/08—Resistance to extreme temperature
• • 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
  • C10N2040/00—Specified use or application for which the lubricating composition is intended
  • C10N2040/12—Gas-turbines
• • 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
  • C10N2040/00—Specified use or application for which the lubricating composition is intended
  • C10N2040/12—Gas-turbines
  • C10N2040/13—Aircraft turbines
• • 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
  • C10N2040/00—Specified use or application for which the lubricating composition is intended
  • C10N2040/20—Metal working
  • C10N2040/24—Metal working without essential removal of material, e.g. forming, gorging, drawing, pressing, stamping, rolling or extruding; Punching metal
• • 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
  • C10N2040/00—Specified use or application for which the lubricating composition is intended
  • C10N2040/20—Metal working
  • C10N2040/241—Manufacturing joint-less pipes
• • 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
  • C10N2040/00—Specified use or application for which the lubricating composition is intended
  • C10N2040/20—Metal working
  • C10N2040/242—Hot working
• • 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
  • C10N2040/00—Specified use or application for which the lubricating composition is intended
  • C10N2040/20—Metal working
  • C10N2040/243—Cold working
• • 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
  • C10N2040/00—Specified use or application for which the lubricating composition is intended
  • C10N2040/20—Metal working
  • C10N2040/244—Metal working of specific metals
• • 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
  • C10N2040/00—Specified use or application for which the lubricating composition is intended
  • C10N2040/20—Metal working
  • C10N2040/244—Metal working of specific metals
  • C10N2040/245—Soft metals, e.g. aluminum
• • 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
  • C10N2040/00—Specified use or application for which the lubricating composition is intended
  • C10N2040/20—Metal working
  • C10N2040/244—Metal working of specific metals
  • C10N2040/246—Iron or steel
• • 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
  • C10N2040/00—Specified use or application for which the lubricating composition is intended
  • C10N2040/20—Metal working
  • C10N2040/244—Metal working of specific metals
  • C10N2040/247—Stainless steel
• • 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
  • C10N2050/01—Emulsions, colloids, or micelles
• • 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
  • C10N2050/015—Dispersions of solid lubricants
  • C10N2050/02—Dispersions of solid lubricants dissolved or suspended in a carrier which subsequently evaporates to leave a lubricant coating
• • 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
  • C10N2080/00—Special pretreatment of the material to be lubricated, e.g. phosphatising or chromatising of a metal

Definitions

• the present invention relates to high temperature inorganic lubricants, more particularly, to a lubricant composition of inorganic alkali metal and ammonium phosphates which are free from oils and fats and to which are added viscous soluble potassium polyphosphates, and a method of lubricating surfaces subjected to high temperatures.
• rganic materials such as fats, oils and soaps are generally used as lubricants.
• Such organic lubricants are limited to temperatures below 200 C. and only in exceptional cases can these lubricants be used at temperatures as high as 230 C.
• graphite is generally used.
• the graphites which are used contain a large quantity of ash.
• the ash has the effect "of a parting compound as is evidenced by the deposition of ashes on the material being worked. In addition, this ash may become welded or fused. Consequently, the tools used may be damaged and the surface of the worked material may be subjected to scoring.
• a vehicle or carrier coating in an elfort to produce a strong adherence of organic lubricants to the surface.
• vehicle coatings comprised salts or salt mixtures.
• phosphate coatings were used as vehicles with such phosphates being produced in the conventional manner by phosphatizing.
• lubricating coatings on metals were also produced by the action of a dispersion or a solution of aliphatic phosphates conraining? to 18 carbon atoms.
• these described lubricants were also limited to the aforementioned low temperatures because of the decomposition of the organic substances.
• lubricants such as viscous aqueous solutions of polyphosphates, Kurrols salts or metaphosphoric acid whose lubricating effect depends on the viscosity of the solution were also limited to the use at low temperatures.
• High temperature lubricant which has been known comprises a water-soluble lubricant which has a simultaneousdescaling effect and which becomes soft at the comparatively low temperature of 300 C. This material adheres to a surface up to temperatures of about 1000" C.
• This lubricant did not contain any abrading or parting compounds and comprised particular Car dildhfid-E Patented .lune l, lQfiS "ice proportions of alkali metal phosphate and alkali metal tetraborate.
• the lubricant has a descaling effect by forming boundary layers which, in turn, have a lubricating effect.
• this lubricant did not contain a viscous soluble potassium polyphosphate.
• Another proposed lubricant for the working of low melting alloys were glasses containing alkali metal oxide, phosphorous pentoxide and alumina (aluminum oxide). Such glasses are virtually insoluble in water because of the presence of aluminum oxide therein. Further, it is extremely difficult to remove this lubricant from a metallic surface, particularly from the interior of tubes. These same disadvantages are also present when using silicate glasses or slags as high temperature lubricants. Such lubricants require a post mechanical treatment by sandblasting or the application of a particular chemical after treatment with hydrofluoric acid. Further, the use of such enamels and glasses requires the previous descaling of the metal surface.
• oiland fat-free lubricants comprising inorganic alkali metal and ammonium phosphates can be applied as an aqueous solution on the surface to be lubricated wherein the water will evaporate and the resulting residue melt will provide sufiicient and adequate lubrication.
• the disadvantages of prior art lubricants as described previously can be avoided by ren dering the lubricating solution highly viscous by admixing therewith viscous soluble potassium polyphosphate so as to form a viscous solution.
• the salts of the lubrieating solution are so selected that they form, after evaporation, a mixture in the range of the eutectic composition.
• Such salts are alkali metal phosphates alone or together with one or more of the following: alkali metal borates, alkali metal sulfates, alkali metal chlorides, alkai metal fluorides, or alkalimetal chromates.
• the alkali metal cations are preferably sodium and potassium, but it is also possible to use other alkali metal cations as well as the ammonium ion.
• a portion of the alkali metal or ammonium salts can be replaced by salts of bivalent phosphate to' be dissolved in Water.
• 'lubricant of this invention additionally contains a water- 'herence of the lubricant also at low temperatures.
• metals particularly magnesium, manganese.
• Viscous soluble potassium polyphosphate has the characteristic of rendering a solution viscous. This viscous solution can then be easily and uniformly applied to working surfaces. After the water has evaporated, the remaining residue melt will also be viscous but will have a different viscosity than the solution as originally applied. This melt will readily adhere to the surface even at high calcium, Zinc, and
• the viscosity of a 10% solution of the lubricant of this invention will be about 8-20 centipoises, preferably between 10-20 centipoises, measured in a rotation viscosimeter with a shearing gradient of 700 (secondsat a temperature of 50 C.
• soluble salt with another cation other than potassium preferably a sodium salt such as a sodium orthophosphate or a'condensed sodium phosphate.
• aqueous solutions of the lubricant of this invention can be applied by brushing, spraying, or in any other suitable way.
• the Water in the solution evaporates and the lubricant residue will adhere as a film to the surface. No crystallizing of the components of the lubricant or a breaking down of the solution will occur because of the high viscosity of the solution.
• the lubricating effect per se is accomplished by the melted eutectic mixture.
• the viscosity of the residue melt which depends on the temperature is independent of the viscosity of the solution.
• K 0 is used as viscous soluble potassium polyphosphate.
• This lubricant is particularly applicable for medium temperature lubrication.
• the lubricant begins to melt at 200-250? C. and remains amelt up to 400 C. From 400 C. to; 500 C. the lubricant-is not amelt but above 500.” 'C; again becomes a melt. If 1-10%, preferably '1' 15%', of the sodium and/ or potassium is replaced by bivalent metals such as magnesium, Zinc or manganese, the
• lubricant will remain a melt in the range of 400-500 C.
• the Water is introduced as water of constitution and Water of crystallization. All of this water is evaporated prior to obtaining the lubricating effect.
• potassium is in the form of a viscous soluble potassium polyphosphate.
• This lubricant is applied as a highly viscous slurry of about 30% lubricant mixture and water.
• Lubricant II has been used particularly in the fabrication of seamless tubes.
• a process of diagonally rolling high-grade alloy steel over a mandrel there was a high degree of waste since, many times, it was impossible to remove a jammed mandrel from the steel.
• the mandrels were damaged so that it was only possible to roll an average of 3.8
• K 0 is introduced as viscous soluble potassium polyphosphate.
• this lubricant it is possible to substitute sulfuric acid, hydrofluoric acid, or chromic acid (C1O3) for the B 0 in the same proportions.
• lubricants IV and V about 66% of the K 0 is introduced as a viscous soluble potassium polyphosphate and the remainder as potassium orthophosphate (KH PO
• KH PO potassium orthophosphate
• Pilger tube mill One form -.of forging rolls is known as the Pilger tube mill vwhich'is largely used for forminglarge diameter seamless tubing by rolling the billet off of the end of a mandrel.
• the Pilger tube mill performs a rolling and forging process by eccentrically positionedrollers.
• a seamless tube is then formed progressively from the billet with the, tube being rolled over the entire length of the mandrel.
• the mandrel becomes red hot during this process and must be removed from the tube. In many cases it was diflicult to remove the mandrel from the tube so that during the removal thereof the finished tube was damaged.
• agents having a higher borate content e.g., 10-28% by weight of P 18-30% by weight of B 0 18-21% by weight of Na O, l-3% by weight of K 0, 03-08% by Weight of Mn(), and 2940% by weight of water of crystallization and water of constitution.
• K 0 is introduced in the form of viscous soluble potassium polyphosphate in both lubricants VI and VII.
• Lubricants VI and VII are applied as 2-3% solutions in water. Here also the solutions are viscous and remain viscous after the evaporation of the water to adhere to the surface. This lubricant is applied in lower concentrations since Na B 0 is not particularly soluble in water.
• This solution is preferably applied by being sprayed twice on the surface. After the first spraying, the water is evaporated. Subsequently, the solution is sprayed again on the same surface.
• the viscosity of the solution is important, because if not viscous, the solution will flow off 1 of the surface when it is a mandrel or the like.
• Very good lubricating results can also be obtained when using the lubricant of this invention, particularly lubricants VI and VII, in a process of forming a seamless tube wherein a red hot billet is mounted on the head of a mandrel of uniform diameter and the mandrel and the billet are pushed through an arrangement of openings or idler rollers which progressively decrease in size.
• the edges of these openings or the rollers have the effect of pushing the softened metal over the head of the mandrel and over the entire length thereof and it is necessary that the friction be reduced to a minimum.
• the process is similar to that of a conventional extruding process for forming tubes. In such extrusion processes the tubes may be formed from either solid or hollow (pierced) billets.
• the Inbricant of this invention can be successfully used in many other high temperature operations, several of which will be described.
• This lubricant has also been successively used on dies in drop forging such as employed in the forging of flywheels.
• a lubricant comprising a mixture of oil and graphite was used the dies were subjected to the formation of numerous cracks therein which eventually resulted in the destruction of the dies.
• the use of the lubricant of this invention resulted in doubling the service life of the dies. Further, it was only necessary to thoroughly clean the worn dies but it was not necessary to replace them completely.
• This invention can also be applied to the extruding of ferrous and non-ferrous metals, particularly in the formation of tubing.
• known lubricants in the formation of copper tubes, only the core of the copper billets can be used in the ⁇ formation of the tube and the exterior walls of the billet were left in place.
• the lubricants of this invention it was possible to utilize the entire billet so that Waste and scrap were considerably reduced. Further, the output was greatly increased since the time-consuming process of removing the billet shells was avoided.
• the lubricant of this invention is a high temperature lubricant which can be successfully used in many other high temperature zones (about 1000" 0.). While the greatest application of this lubricant is in the field of metal rolling and forming it can also be used as a lubricant for the doors of open hearth furnaces and many other atmospheres where high temperatures are encountered.
• the present invention has provided a method and substance for lubricating working surfaces in various metal-forming operations.
• the use of this lubricant has resulted in a decrease in lubrication costs and in an improvement in the entire metal-working process since the output was increased and waste considerably reduced.
• the present invention discloses a high temperature lubricant and a process of lubricating surfaces subjected to high temperatures.
• the preferably used lubricant essentially consists of 50-90% of alkali metal phosphate and 10-50% of alkali metal borate wherein 2-20% of the mixture by weight is potassium polyphosphate.
• This lubricant preferably comprises 70-80% of alkali metal phosphate and 20-30% of alkali metal borate with 10% of the mixture by weight being potassium polyphosphate.
• An oiland fat-free lubricant for application as an aqueous solution to a metallic surface to be lubricated where it dries and the resulting residue melt produces a lubricating effect and consisting essentially of a viscous soluble potassium polyphosphate and at least one inorganic monovalent salt selected from the group consisting of alkali metal phosphate and ammonium phosphate and at least one salt selected from the group consisting of magnesium phosphate, calcium phosphate, zinc phosphate, manganese phosphate, alkali metal borate, ammonium borate, magnesium borate, calcium borate, zinc borate, manganese borate, alkali metal sulfate, ammonium sulfate, magnesium sulfate, calcium sulfate, zinc sulfate, manganese sulfate, alkali metal chloride, ammonium chloride, magnesium chloride, calcium chloride, zinc chloride, manganese chloride, alkali metal fluoride, ammonium chlor
• a process of lubricating a metallic surface subjected to high temperatures comprising the steps of mixing with water a viscous soluble potassium polyphosphate in substantially eutectic proportions with at least one inorganic monovalent salt selected from the group con sisting of alkali metal phosphate and ammonium phosphate and at least one salt selected from the group consisting of magnesium phosphate, calcium phosphate, zinc phosphate, manganese phosphate, alkali metal borate, ammonium borate, magnesium borate, calcium borate, zinc borate, manganese borate, alkali metal sulfate, ammonium sulfate, magnesium sulfate, calcium sulfate, zinc sulfate, manganese sulfate, alkali metal chloride, am monium chloride, magnesium chloride, calcium chloride, zinc chloride, manganese chloride, alkali metal fluoride, ammonium fluoride, magnesium fluoride, calcium fluoride, zine fluoride
• inorganic lubricants for application as an aqueous solution to a metallic surface to be lubricated when it dries and the resulting melt produces a lubricating effect, and comprising a mixture of an inorganic phosphate selected from the group consisting of an alkali metal phosphate and ammonium phosphate, and a metallic compound selected from the group consisting of monovalent and divalent metal salts containing a cation other than potassium and a viscous soluble potassium polyphosphate mixed therewith, the ratio of the salts being such that a substantially eutectic composition is formed after evaporation of the water.
• a process of lubricating a metallic surface subjected to high temperature with an oiland fat free lubricant comprising the steps of mixing in substantially eutectic proportions a viscous soluble potassium polyphosphate with an inorganic phosphate selected from the group consisting of an alkali metal phosphate and ammonium phosphate and also with a metallic compound selected from the group consisting of monovalent and divalent metal salts containing a cation other than potassium, and applying a viscous aqueous solution of the mixture to the surface, and drying the mixture on the surface so that the remaining residue adheres to the surface as a lubricant.
• An oiland fat-free lubricant for application as an aqueous solution to a metallic surface to be lubricated in the proportions of said substances are 60-68% by weight of P 0 17-28% by weight of Na O and 92l% by weight of K 0. V a
• a process of lubricatinga metallic surface which is subjected to high temperaturesand comprising applying to thesurface an aqueous mixture of phosphates, analyzing 55-69% by weight of P 0 14-35% by weight of Na O and 5-27% by Weight of K 0 with 5-100% of the K 0 being in the form of viscous soluble potassium polyphosphate.
• a process of lubricating a metallic surface which is subjected to high temperatures and comprising applying to the surface an aqueous mixture of phosphates, analyzing'60-68%'by weight of P 0 17-28% by weight of Na O and 9-2l% by weight of K 0 with 5-100% of the K 0 being in the form of viscous soluble potassium polyphosphate. 7
• a process for lubricating a metallic surface at high temperatures comprising applying 'to the surface a viscous aqueous solution analyzing 55-69% by weight of P 0 14-35% .by weight of Na O and 527% by weight of K 0, 5-100% of the K 0 being in the form of viscous soluble potassium polyphosphate and evaporating the water from the applied solution so that the remaining residue melt will adhere to the .surface 'as a lubricant.
• a solution of a high temperature lubricant consist- .ing essentially of a viscous solution analyzing -28% by weight of P 0 18-30% by weight'of'B o 18-21% by weightof Na O, l-3% by weight of K 0, 03-08% by weight of MnO and 29-40% by weight .of H 0, the K 0 being in the form of viscous soluble potassium polyphosphate.
• a solution of a high temperature lubricant consisting essentially of a viscous solution of 27.23% by weight analyzing P 0 18.50% by weight of B 0 20.70% by weight of N320, 3.00% by weight of K 0, 0.77% by weight of MnO and 29.80% by weight of H 0, the K 0 being in the form of viscous soluble potassium polyphosphate.
• N320 by weight of N320, 1.45% by weight of K 0, 0.31 by weight of MnO and 40.00% by weight of H 0, the K 0 I being in the form of viscous soluble potassium polyphosphate.
• a high temperature lubricant consisting essentially of a mixture of 50-90% alkalimetal phosphate 7,
• alkali metal borate wherein 2-20% by weight of the mixture is viscous soluble potassium poly- 'phosphate, and at least a portion of the alkali metal cation'is other than potassium.
• a high temperature lubricant consisting essentially of a mixture of 70-80% alkali metal phosphate and -30% of alkali metal bo-rate wherein 2-20% by weight of the mixture is viscous soluble potassium polyphosphate, and'at least a portion of the alkali metal cation where it dries and the resulting residue produces a lubrieating effect, and consisting essentially of a mixture of phosphates, analyzing 55-69% byweight of P 0 14- by weight of Na O and 5-2'7% by weight of K 0, with 5-10()% of the K 0 being in the form of viscous soluble potassium polyphosphate,
• phosphates analyzing -69% by weight of P 0 14-35% by weight of Na O and 5- 27% by weight of K 0, with 5-100% of the K 0 being in the form of viscous soluble potassium 'p'olypliosphate, said mixturecontaining-both water of constitution and a water of crystallization.
• a high temperature lubricant consisting essentially of a mixture of 70-80% alkali metal phosphate 2 and 20-30%" of alkali metal borate wherein 10% by weight of the mixture is viscous soluble potassium polyphosphate, and at least a portion of the alkali metal cation is other than potassium.
• A high temperature lubricant consisting essen tially of a mixture of 50-90% alkali metal'phosph'ate and 10-50% of alkali metal borate;wherein.2-20% by weight of the mixture. is viscous soluble potassium polyphosphate, 1;1 0% of the alkali metal being replaced by a a bivalent metal selected from the. group consisting of magnesium, calcium, zinc,jand manganese.
• a high temperature lubricant consisting essen- I tially of a mixture of 50 %*alkali metakphosphate and I D- 50% ofalkali metal boratej wherein 2-20% by weight of the mixture is viscous soluble potassiumpoly- 9 phosphate, '1-5% of the alkali metal being replaced by a bivalent metal selected from the group consisting of magnesium, calcium, zinc, and manganese.

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• Chemical & Material Sciences (AREA)
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• Mechanical Engineering (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Organic Chemistry (AREA)
• Lubricants (AREA)

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Cited By (8)

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• 0
  • BE BE602568D patent/BE602568A/xx unknown
  • NL NL263557D patent/NL263557A/xx unknown
• 1960
  • 1960-04-14 DE DE19601444795 patent/DE1444795B1/de active Pending
• 1961
  • 1961-03-20 LU LU39914D patent/LU39914A1/xx unknown
  • 1961-04-12 US US102373A patent/US3186945A/en not_active Expired - Lifetime
  • 1961-04-12 FR FR41453A patent/FR1286265A/fr not_active Expired
  • 1961-04-14 GB GB13569/61A patent/GB939928A/en not_active Expired

Patent Citations (5)

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