US20030176294A1 - Aqueous one step type lubricanting agent for efficient cold forging - Google Patents

Aqueous one step type lubricanting agent for efficient cold forging Download PDF

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Publication number
US20030176294A1
US20030176294A1 US10/362,996 US36299603A US2003176294A1 US 20030176294 A1 US20030176294 A1 US 20030176294A1 US 36299603 A US36299603 A US 36299603A US 2003176294 A1 US2003176294 A1 US 2003176294A1
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United States
Prior art keywords
cold forging
lubricant
wax
aqueous
aqueous lubricant
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Abandoned
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US10/362,996
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English (en)
Inventor
Mamoru Yamamoto
Masayuki Yoshida
Yasuo Imai
Hidehiro Yamaguchi
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Honda Motor Co Ltd
Nihon Parkerizing Co Ltd
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Honda Motor Co Ltd
Nihon Parkerizing Co Ltd
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Application filed by Honda Motor Co Ltd, Nihon Parkerizing Co Ltd filed Critical Honda Motor Co Ltd
Assigned to HONDA MOTOR CO., LTD., NIHON PARKERIZING CO., LTD. reassignment HONDA MOTOR CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: YOSHIDA, MASAYUKI, IMAI, YASUO, YAMAGUCHI, HIDEHIRO, YAMAMOTO, MAMORU
Publication of US20030176294A1 publication Critical patent/US20030176294A1/en
Abandoned legal-status Critical Current

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    • 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
    • C10M2201/08—Inorganic acids or salts thereof
    • 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
    • C10M2201/084—Inorganic acids or salts thereof containing sulfur, selenium or tellurium
    • 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
    • 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
    • C10M2201/10—Compounds containing silicon
    • C10M2201/102—Silicates
    • 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
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/14—Synthetic waxes, e.g. polythene waxes
    • 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
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/16—Paraffin waxes; Petrolatum, e.g. slack wax
    • 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
    • C10M2207/126—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids monocarboxylic
    • 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
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/02—Groups 1 or 11
    • 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
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/04—Groups 2 or 12
    • 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
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/06—Groups 3 or 13
    • 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
    • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
    • 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
    • C10N2040/243—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
    • 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

Definitions

  • the present invention is related to a process to form a lubricative coating layer having excellent performance as lubricant onto the surface of a metallic material to be subjected to the high efficient cold forging without any previous chemical treatment.
  • the present invention is related also to an aqueous lubricant of one process type used for high efficient cold forging, which facilitates to simplify the conventional lubricant layer forming processes, that is, to minimize space area required for forming the lubricative coating layer and not to increase industrial waste products.
  • coating layer is formed onto the surface of a metallic material.
  • the coating layer may prevent a direct contact of the metallic material with a forging tool, and may decrease a surface defects of burning and biting of the metallic material which may arise by direct contact with the forging tool.
  • the lubricative coating formed by being adhered directly onto the surface of a metallic material has less adhesive performance than the lubricative coating by being used lubricant on to the chemical layer formed previously over the surface of the metallic material, and therefore, the former type is generally used for the cold forging with less amount of deformation.
  • the chemical layer is firstly formed on the surface of a metallic material through a chemical process such as phosphate layer forming process and oxalate layer forming process, which generally form chemical layer suitable as a carrier of a lubricant, and the lubricant having high lubricative property is used on to the chemical layer.
  • the formed film has a bilayer structure consisting of a chemical layer as a carrier and a lubricant layer, which has high resistant property against surface defects.
  • the lubricant applied onto the chemical layer may be divided into major two groups in terms of the usage.
  • the first group includes a lubricant to be mechanically adhered onto the chemical layer and the second group includes a lubricant which reacts with the chemical layer.
  • the first group of lubricant includes one prepared by using mineral oil, vegetable oil or synthetic oil as base oil and containing an extreme pressure additive in the base oil and one prepared by dissolving a solid lubricant, such as graphite and molybdenum disulfide, together with a binder component into the water.
  • a solid lubricant such as graphite and molybdenum disulfide
  • a reactive soap such as sodium stearate is used for a cold forging where particularly high lubricative property is required.
  • the reactive soap reacts with the chemical layer and provides a layer of high lubricative property.
  • the waste water arising in the formation process of the phosphate layer is containing the phosphate compounds.
  • Such waste water should be appropriately treated in order to remove its contained phosphate compounds.
  • waste water containing phosphate compounds is subjected to neutralization with slaked lime to precipitate the phosphate.
  • the precipitated phosphate compounds is separated from water and is discarded as industrial waste together with the sludge described above.
  • JP52-20967A wherein a lubricant composition containing water soluble polymer or its aqueous emulsion as the base component, a solid lubricant and a film-forming agent is disclosed.
  • a lubricant composition containing water soluble polymer or its aqueous emulsion as the base component, a solid lubricant and a film-forming agent is disclosed.
  • no composition which has the same effect as the conventional process of using a chemical layer and a reactive soap has been obtained.
  • aqueous lubricant used for cold working of metallic material disclosed in JP10-8085A
  • This prior art relates to an aqueous lubricant used cold forging of metallic material in which (A) water soluble inorganic salt, (B) solid lubricant, (C) at least one oil selected from a group consisting of chemical oil, animal oil, vegetable oil and synthetic oil, (D) surface active agent and (E) water are well dispersed and emulsified homogenously.
  • This prior art is related to an aqueous non-reactive type lubricant, and is aiming at simplifying the conventional three processes of phosphate layer formation, water rinsing and reactive soap application. That is, in this process, the lubricant film is formed directly on the surface of the metallic material by contacting the metallic material with the aqueous lubricant of one process type by means of dipping or the like, without forming any chemical layer previously on the surface of the metallic material.
  • This type of lubricant is generally called as lubricant of one process type.
  • the lubricant according to this prior art is too unstable to use in an industrial scale since it contains emulsified oil component, and it is not steady to show a high lubricative properties in high efficient cold forging.
  • an invention of “A lubricant composition used for cold working of metallic materials” shown in JP2000-63380A can be cited.
  • This prior art is directed to a lubricant comprising (A) synthetic resin, (B) water soluble inorganic salt and water, wherein the ratio of (B)/(A) by weight in solid state is in a range from 0.25/1 to 9/1 and the synthetic resin is either dissolved or dispersed in the composition.
  • this composition is also not steady to show a high lubricative properties in high efficient cold forging.
  • a suitable aqueous lubricant of one process type is obtainable by combining an water soluble inorganic salt, wax and metal salt of a fatty acid in an aqueous solution at a specific combining rate.
  • the aqueous lubricant of the present invention requires only one step of applying the lubricant and does not require 3 steps consisting of chemical reaction for phosphate layer formation, water rinsing and application with a reactive soap. These 3 steps are required in the conventional process. Also, the aqueous lubricant of the invention is a simplified process and may decrease to produce industrial waste than the conventional processes.
  • the present invention is an aqueous lubricant of one process type used for high efficient cold forging characterized in that the aqueous lubricant comprises (A) a water soluble inorganic salt, (B) wax and (C) a metal salt of a fatty acid, wherein these component are dissolved or dispersed in an aqueous solution and the ratio by weight in solid state of (B)/(A) is in a range of 0.60 ⁇ 0.70 and the ratio by weight in solid state of (C)/(A) is in a range of 0.1 ⁇ 0.3.
  • the lubricant of the present invention is suitable for manufacturing an important parts of transportation machineries.
  • the preferable water soluble inorganic salt may be selected from a group consisting of sulfate, silicate, borate, molybdate and tungstate, and the wax is preferably a synthetic wax being dispersed in water and having a melting point in a range of 70 ⁇ 150° C.
  • the metal salt of a fatty acid is preferably a compound obtained by reacting saturated fatty acid of C12 ⁇ C26 with at least one metal selected from a group consisting of zinc, calcium, barium, aluminum magnesium and lithium.
  • FIG. 1 is a view showing the dimensional accuracy in cold forging process 2 shown later in the embodiment.
  • the water soluble inorganic salt (A) used in the aqueous lubricant of the present invention is contained in order to give hardness and strength to the lubricative coating layer formed on the surface of the metallic material.
  • the water soluble inorganic salt having such performance is required to have a property to be homogeneously dissolved in the aqueous lubricant and to form a strong lubricative coating layer when drying.
  • the inorganic salt giving such property it is preferable to use at least one selected from a group consisting of sulfate, silicate, borate, molybdate and tungstate.
  • sodium sulfate, potassium sulfate, potassium silicate, sodium borate (sodium tetraborate), potassium borate (potassium tetraborate), ammonium borate (ammonium tetraborate), ammonium molybdate, sodium molybdate and sodium tungstate may be given. Any of these salts may be used either alone or in combination of 2 or more salts.
  • the wax (B) it is preferable to use a synthetic wax, though there is no specific limitation in the structure and the type.
  • the wax may melt by a heat generated during the plastic deformation in cold forging, thereby improving the lubricative property of the lubricative coating layer. From this reason, it is preferable having a melting point in a range of 70 to 150° C. and being stable in aqueous lubricant so as to perform the preferable lubrication at the initial stage of the cold forging.
  • the practical examples for the wax may include microcrystalline wax, polyethylene wax, polypropylene wax and the like. These waxes are preferably contained in a form of water dispersion or water emulsion to the aqueous lubricant.
  • the (B)/(A), namely the ratio by weight in solid state of the wax (B) relative to the water soluble inorganic salt (A) is preferably in a range of 0.6 ⁇ 0.7.
  • high efficient cold forging which is a hard process, there is possibility that the lubricative performance of the lubricative coating layer may be insufficient when the ratio described above is less than 0.6, while the adhesive performance of the lubricative coating layer may be insufficient when said ratio is more than 0.7.
  • the metal salt of a fatty acid (C) used in the present invention is for providing lubricative performance, and as the metal salt of a fatty acid, though there is no specific limitation in the type, it is preferable to use a product obtained by reacting saturated fatty acids of C12 ⁇ C26 with at least one metal selected from a group consisting of zinc, calcium, barium, aluminum, magnesium and lithium.
  • any of calcium stearate, zinc stearate, barium stearate, magnesium stearate and lithium stearate exists in an aqueous lubricant in dispersed from, and a known surface active agent may be used when required.
  • the (C)/(A), namely the ratio of the aqueous inorganic salt (A) and the metal salt of a fatty acid (C) is set at a rate ranging from 0.1 to 0.3 by weight as the solid state.
  • a severe working condition like the high efficient cold forging
  • the knockout property of the processed parts may be insufficient when said ratio is less than 0.1.
  • the accuracy of dimension of the obtained cold forged parts could be insufficient when said ratio is more than 0.3.
  • any surface active agent of nonionic, anionic, amphoteric and cationic type may be used.
  • the nonionic surface active agent includes, but not specifically limited to, polyoxyethylene alkyl ester, polyoxyalkylene (ethylene or propylene) alkyl phenyl ether, polyoxyethylene alkyl ester comprising polyethylene glycol (or ethylene oxide) and higher fatty acid (C12 ⁇ C18, for example), polyoxyethylene sorbitan alkyl ester comprising sorbitan, polyethylene glycol and higher fatty acid (C12 ⁇ C18, for example).
  • the anionic surface active agent includes, but not specifically limited to, fatty acid salts, sulfuric esters, sulfonates, phosphoric esters and dithiophosphoric esters.
  • the amphoteric surface active agent includes, but not specifically limited to, carboxylates either in amino acid configuration or betaine configuration, sulfuric esters, sulfonates, phosphoric esters.
  • the cationic surface active agent includes, but not specifically limited to, amine salts of fatty acids, quaternary ammonium salts and the like. Each of these surface active agent may be used either alone or in combination of two or more of them.
  • the aqueous lubricant of one process type of the present invention is used for high efficient cold forging for metallic materials where more than 70% of section area reduction rate are given at one stroke.
  • the important parts for transportation machineries used for automobiles and motorcycles, such as power train and chassis may be produced preferably by applying the aqueous lubricant of the present invention.
  • the shape of the cold forging products is not particularly limited to cylindrical shape and is also applicable foe processing of more complicated configuration, such as gears and gear shafts.
  • aqueous lubricant of the present invention may satisfactorily be applied when the surface of the metallic material is fully covered with the aqueous lubricant by any method. After the coating, it is required to dry the coated aqueous lubricate.
  • the weight of the formed lubricative coating layer (the amount of the coating) onto the surface of the metallic material is an important factor since it greatly affects the processing performance, such as lubricative performance and resistance to burning and biting.
  • the weight of the formed coating layer may be calculated based on the weight difference between before and after the formation of the coating layer and the coated area of the metallic material.
  • Weight of the lubricative coating layer (Weight after the formation of the coating layer ⁇ Weight before the formation of the coating layer)/(Area of the metallic material)
  • the weight of the formed lubricative coating layer suitable for the following cold forging process it is preferable to be in a range of 5 ⁇ 15 g/cm 2 .
  • the weight of the formed coating layer is less than 5 g/cm 2 , sufficient lubricative performance cannot be provided, and causing burning defects during the high efficient cold forging.
  • the weight of the formed coating layer exceeds 15 g/cm 2 ,exfoliated lubricant film(dregs) may tend to remain in the cold forging mold, and the dregs in the cold forging mold may adversely affect the dimension accuracy of the cold forged products by forming a partial underfill portion of the forged products.
  • the concentration of the constituent of the aqueous lubricant can be controlled so as to adjust the weight of the formed lubricative coating layer to be in the range described above.
  • Grade of steel JIS G 4105 SCM420.
  • a shaft specimen having a diameter of 27 mm produced in the forging process 1 was subjected to annealing and then cold forged by forward extrusion as shown in FIG. 1 and the diameter at A part of FIG. 1 was measured.
  • Resistance to burning in cold forging process 1 Surface defects on the cold forging tool and cold forged products were visually observed. If surface defects are observed, it is not acceptable.
  • Simplification of the lubrication process Evaluation was made based on the number of treatment steps in lubrication process and the total plant area necessary for lubrication process. Less treatment step and less area are preferable.
  • Environmental protection Amount of waste products (drainage, sludge, etc) generated in treatment of 6,000 pieces of specimen was measured. Less amount for the treatment is preferable.
  • Lubricant 1 as below was used, and coating was carried out according to lubrication process A (one process type).
  • Lubricant 1 As below was used, and coating was carried out according to lubrication process A (one process type).
  • Aqueous inorganic salt Sodium tetraborate
  • Wax Polyethylene wax(1% by weight of nonionic surface active agent was added for improving dispersion).
  • Metal salt of fatty acid Calcium stearate
  • Lubricant 2 as below was used, and coating was carried out according to lubrication process A (one process type).
  • Lubricant 2
  • Aqueous inorganic salt Potassium tetraborate
  • Wax Microcrystalline wax(1% by weight of nonionic surface active agent was added for improving dispersion).
  • Metal salt of fatty acid Calcium stearate-Solid component ratio: (B)/(A): 0.6
  • Lubricant 3 as below was used, and coating was carried out according to lubrication process A (one process type).
  • Lubricant 3 was
  • Aqueous inorganic salt Sodium tetraborate
  • Wax Polyethylene wax (1% by weight of nonionic surface active agent was added for improving dispersion).
  • Metal salt of fatty acid Calcium stearate
  • Lubricant 4 as below was used, and coating was carried out according to lubrication process A (one process type).
  • Lubricant 4
  • Aqueous inorganic salt Sodium tetraborate
  • Wax Paraffin wax (1% by weight of nonionic surface active agent was added for improving dispersion).
  • Metal salt of fatty acid zinc stearate
  • Lubricant 5 as below was used, and coating was carried out according to lubrication process A (one process type).
  • Lubricant 5
  • Aqueous inorganic salt Sodium tetraborate
  • Wax Paraffin wax (1% by weight of nonionic surface active agent was added for improving dispersion).
  • Metal salt of fatty acid Calcium stearate
  • Lubricant 6 as below was used, and coating was carried out according to lubrication process A (one process type).
  • Lubricant 6 As below was used, and coating was carried out according to lubrication process A (one process type). Lubricant 6:
  • Aueous inorganic salt Sodium tetraborate
  • Wax Polyethylene wax (1% by weight of nonionic surface active agent was added for improving dispersion).
  • Metal salt of fatty acid Calcium stearate
  • Lubricant 7 as below was used, and coating was carried out according to lubrication process A (one process type). Lubricant 7:
  • Aqueous inorganic salt Potassium tetraborate
  • Wax Polyethylene wax (1% by weight of nonionic surface active agent was added for improving dispersion).
  • Coating was carried out according to the lubrication process B (Phosphate layer+Reactive soap).
  • Comparative Example 4 For the coating obtained in Comparative Example 3, where both (B)/(A) and (C)/(A) are slightly different from the scope of the present invention, the dimensional accuracy was insufficient. Further, in Comparative Example 4, where (phosphate layer+reactive soap) were applied as same as a conventional process, similar process performance with that obtainable in the present invention are shown, however, this Comparative example requires more treatment steps and requiring more plant area necessary for process, and furthermore, it produces greater amount of waste products.
  • Metal salt of fatty acid (C) Calcium stearate.
  • the aqueous lubricant of the present invention enables to form a coating layer having high performance to the surface of metallic materials. And less number of treatment steps and less plant area necessary for coating process are required in the present invention. In addition, aqueous lubricant of the present invention produces less industrial waste and is preferable for global environmental protection.
  • the process of the present invention enables to improve the process by saving the treatment time of coating, by increasing the efficiency of coating, by saving the energy and by saving the production cost.
US10/362,996 2000-09-05 2001-09-03 Aqueous one step type lubricanting agent for efficient cold forging Abandoned US20030176294A1 (en)

Applications Claiming Priority (2)

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JP2000-267887 2000-09-05
JP2000267887 2000-09-05

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US (1) US20030176294A1 (fr)
EP (1) EP1316602A1 (fr)
JP (1) JPWO2002020704A1 (fr)
CN (1) CN1274796C (fr)
AU (1) AU2001282601A1 (fr)
BR (1) BR0113641A (fr)
CA (1) CA2419732A1 (fr)
TW (1) TW539744B (fr)
WO (1) WO2002020704A1 (fr)

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US20120082583A1 (en) * 2010-09-30 2012-04-05 Hitachi Powdered Metals Co., Ltd. Production method for sintered member
CN102732358A (zh) * 2012-06-19 2012-10-17 株洲春华实业有限责任公司 一种冷挤压润滑剂及其使用方法
CN103695089A (zh) * 2013-12-18 2014-04-02 广西大学 不锈钢板金冷模锻的润滑剂
CN103695087A (zh) * 2013-12-18 2014-04-02 广西大学 铜及铜合金板金冷模锻的润滑剂
CN103725378A (zh) * 2013-12-18 2014-04-16 广西大学 拉拔高光洁度铝及铝合金管的润滑剂
CN103756759A (zh) * 2013-12-18 2014-04-30 广西大学 镁及镁合金板金冷模锻的润滑剂

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CN104593124A (zh) * 2015-01-07 2015-05-06 天津奥特盛业重型锻压有限公司 一种冷锻压油配方
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BR0113641A (pt) 2003-10-14
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