EP0261438A2 - Lubricant for forging steel - Google Patents

Lubricant for forging steel Download PDF

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Publication number
EP0261438A2
EP0261438A2 EP87112493A EP87112493A EP0261438A2 EP 0261438 A2 EP0261438 A2 EP 0261438A2 EP 87112493 A EP87112493 A EP 87112493A EP 87112493 A EP87112493 A EP 87112493A EP 0261438 A2 EP0261438 A2 EP 0261438A2
Authority
EP
European Patent Office
Prior art keywords
lubricant
styrene
binder
thickener
solids content
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP87112493A
Other languages
German (de)
French (fr)
Other versions
EP0261438A3 (en
EP0261438B1 (en
Inventor
Hans-Rudolf Staub
Jacques Dr. Périard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lonza AG
Original Assignee
Lonza AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lonza AG filed Critical Lonza AG
Priority to AT87112493T priority Critical patent/ATE55145T1/en
Publication of EP0261438A2 publication Critical patent/EP0261438A2/en
Publication of EP0261438A3 publication Critical patent/EP0261438A3/en
Application granted granted Critical
Publication of EP0261438B1 publication Critical patent/EP0261438B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C10M111/00—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential
    • C10M111/04—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential at least one of them being a macromolecular organic compound
    • 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
    • C10M103/00—Lubricating compositions characterised by the base-material being an inorganic material
    • C10M103/04—Metals; Alloys
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    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M103/00—Lubricating compositions characterised by the base-material being an inorganic material
    • C10M103/06—Metal compounds
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    • 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
    • C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
    • C10M107/02—Hydrocarbon polymers; Hydrocarbon polymers modified by oxidation
    • C10M107/12—Hydrocarbon polymers; Hydrocarbon polymers modified by oxidation containing aromatic monomer, e.g. styrene
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    • C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
    • C10M107/02—Hydrocarbon polymers; Hydrocarbon polymers modified by oxidation
    • C10M107/14—Hydrocarbon polymers; Hydrocarbon polymers modified by oxidation containing conjugated diens
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    • C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
    • C10M125/02—Carbon; Graphite
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    • C10M125/18—Compounds containing halogen
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    • C10M125/22—Compounds containing sulfur, selenium or tellurium
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    • C10M143/00—Lubricating compositions characterised by the additive being a macromolecular hydrocarbon or such hydrocarbon modified by oxidation
    • C10M143/10—Lubricating compositions characterised by the additive being a macromolecular hydrocarbon or such hydrocarbon modified by oxidation containing aromatic monomer, e.g. styrene
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    • C10M143/12—Lubricating compositions characterised by the additive being a macromolecular hydrocarbon or such hydrocarbon modified by oxidation containing conjugated diene
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    • C10M173/00—Lubricating compositions containing more than 10% water
    • C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
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    • C10M2201/042—Carbon; Graphite; Carbon black halogenated, i.e. graphite fluoride
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    • C10M2201/18—Ammonia
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    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
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    • C10M2205/04—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing aromatic monomers, e.g. styrene
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    • C10M2205/063—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing conjugated dienes used as base material
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    • C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an alcohol or ester thereof; bound to an aldehyde, ketonic, ether, ketal or acetal radical
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    • C10M2209/06—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an acyloxy radical of saturated carboxylic or carbonic acid
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    • C10M2209/062—Vinyl esters of saturated carboxylic or carbonic acids, e.g. vinyl acetate
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    • C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
    • C10M2209/084—Acrylate; Methacrylate
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    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/104—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing two carbon atoms only
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    • C10M2209/12—Polysaccharides, e.g. cellulose, biopolymers
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    • 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
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    • 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
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    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/20—Metal working
    • C10N2040/242—Hot working
    • C—CHEMISTRY; METALLURGY
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    • C10N2040/243—Cold working
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
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    • C10N2040/245—Soft metals, e.g. aluminum
    • C—CHEMISTRY; METALLURGY
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    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
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    • C10N2040/244—Metal working of specific metals
    • C10N2040/246—Iron or steel
    • C—CHEMISTRY; METALLURGY
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    • C10N2040/244—Metal working of specific metals
    • C10N2040/247—Stainless steel
    • C—CHEMISTRY; METALLURGY
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    • 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

Definitions

  • the invention relates to a lubricant for use in the shaping of steel at high temperatures, comprising a solid lubricant, a binder and a thickener.
  • Lubricants containing, for example, graphite, alkylene polymers or copolymers and a dispersant or film stabilizer for the non-cutting shaping of metals, in particular for lubricating the mandrel, in the manufacture of seamless tubes (DE-PS 24 50 716).
  • Lubricants of this type especially when used in so-called MPM (multiple pipe mills) lines, have to meet a multitude of requirements.
  • the lubricant must be easy to apply, which can only be achieved economically with the help of an aqueous dispersion. After removal of the carrier, i.e.
  • Binder plays a key role in meeting these requirements.
  • a binder in DE-PS 24 50 716 inter alia: butadiene, and also styrene and styrene with copolymers.
  • these known binders were unable to meet all the requirements that are increasingly being placed on such lubricants.
  • Butadiene as a binder was too soft Styrene, in turn, was unable to form an optimal film, even with the common copolymers.
  • Styrene-butadiene copolymers have also been described in EP-PS 0 164 637, as part of a high-temperature lubricant.
  • this formulation requires a considerable amount of an inorganic salt mixture, which in turn has adverse effects, for example in MPM streets, with regard to poor water resistance.
  • the object of the present invention is to propose a lubricant which does not have the disadvantages mentioned.
  • this is achieved with a conventional lubricant containing a carboxylated styrene-butadiene latex as a binder.
  • the binder is added to the other components of the lubricant as an aqueous dispersion with a solids content of 40 to 60% by weight.
  • the dispersant in the present case essentially water, must be added to the mixing liquid, also essentially water, to the finished lubricant dispersion.
  • composition of the lubricant expediently contains proportions of 50 to 80% by weight of a solid lubricant or solid lubricant mixture, preferably graphite, 20 to 50% by weight of the binder, calculated on its dry matter, and 0.2 to 5.0% by weight of thickener.
  • additives such as wetting agents, emulsifiers, biocides and antioxidants.
  • Their individual proportions are based on the regulations of the producer or on preliminary tests and are usually up to 2% by weight.
  • the individual components used, which produce the lubricant according to the invention, can be selected from the series of product groups mentioned below.
  • Graphite, MoS2 (molybdenum disulfide), CaF2 or BN can be used as the solid lubricant.
  • MoS2 molybdenum disulfide
  • CaF2 or BN can be used as the solid lubricant.
  • graphite leads to particularly good results. From the range of graphites, those with high purity, for example over 96%, and an average grain size of not more than 300 ⁇ m are preferred. The best results can be achieved with a graphite of 99.5% purity and an average grain size of 100 ⁇ m.
  • the lubricant should be present as a 10 to 60% by weight aqueous dispersion for use.
  • the dispersion expediently has a viscosity of 500 to 15000 cp at 10 to 30 ° C.
  • a thickener or a mixture of thickeners is used.
  • suitable thickeners e.g. water-soluble polysaccharides, alkyl celluloses, such as hydroxyalkyl cellulose or carboxymethyl cellulose, polyvinyl alcohols, polyacrylic acid and their derivatives, neutralized or not neutralized, natural rubbers and their derivatives (e.g. guar), polyvinyl pyrrolidone, polyethylene oxides, optionally minerals, such as clays, montmorillonite, modified montmoriton fillers, and how to call natural pitch or natural asphalt.
  • suitable thickeners e.g. water-soluble polysaccharides, alkyl celluloses, such as hydroxyalkyl cellulose or carboxymethyl cellulose, polyvinyl alcohols, polyacrylic acid and their derivatives, neutralized or not neutralized, natural rubbers and their derivatives (e.g. guar), polyvinyl pyrrolidone, polyethylene oxides, optionally minerals, such as clays,
  • the lubricant is applied in the form of an aqueous dispersion.
  • the aqueous dispersion of the lubricant can be applied to the tool, which can have temperatures from 80 to over 350 ° C.
  • the aqueous carrier of the dispersion evaporates and a film of the lubricant forms in a uniform layer thickness.
  • the film of the lubricant is in a homogeneous, waterproof form and is no longer washed or swollen by large amounts of coolant flowing over the tool.
  • the lubricant according to the invention is therefore suitable for the lubrication of tools, e.g. Mandrel, mandrel bar or die, when used to machine workpieces, e.g. blanks or pipes, especially when hot-forming steel and rolling blanks into seamless pipes in so-called MPM lines, possibly also in continuous lines, push bench systems, bar presses or Upsetting presses.
  • tools e.g. Mandrel, mandrel bar or die
  • MPM lines possibly also in continuous lines, push bench systems, bar presses or Upsetting presses.
  • the desired film is formed in a thickness of 10 to 100 m ⁇ .
  • the film is waterproof, ie the subsequent cooling with water does not affect the film in any way.
  • a mandrel temperature of 150 to 250 ° C the film has good mechanical properties (e.g. a scratch hardness of 6.5 N with the Sikkens scratch hardness test).
  • the temperature resistance of the lubricant is easily guaranteed up to 350 ° C. At the same time, these values could not be achieved with the lubricants described so far, as can also be seen from the comparative examples described below.
  • Example 1-3 the solids and water as carriers were processed into dispersions and sprayed onto metallic surfaces which represent the mandrel for test purposes.
  • the measurement results are shown in Table I.

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

Abstract

1. A lubricant for use in non-cutting shaping of steel at high temperatures and containing a solid lubricant, a binder and a thickener, characterised in that the binder is a carboxylated styrene-butadiene latex.

Description

Die Erfindung betrifft einen Schmierstoff für die Verwendung bei der Verformung von Stahl bei hohen Temperaturen, enthaltend einen Festschmierstoff, einen Binder und ein Verdickungsmittel.The invention relates to a lubricant for use in the shaping of steel at high temperatures, comprising a solid lubricant, a binder and a thickener.

Es ist bekannt, Schmierstoffe, enthaltend beispielsweise Gra­phit, Alkylenpolymerisate oder -mischpolymerisate und ein Dis­pergiermittel oder Filmstabilisator für die spanlose Verformung von Metallen, insbesondere zur Schmierung des Dornes, bei der Herstellung von nahtlosen Rohren einzusetzen (DE-PS 24 50 716). Derartige Schmierstoffe müssen, gerade wenn sie in sogenannten MPM (multiple pipe mills)-Strassen eingesetzt werden, einer Vielzahl von Anforderungen gerecht werden. So muss der Schmier­stoff leicht auftragbar sein, was sich wirtschaftlich nur mit Hilfe einer wässrigen Dispersion bewerkstelligen lässt. Der Schmierstoff muss nach dem Entfernen des Trägers, also des Wassers als wasserfester, gleichmässig dicker Film zurück bleiben, und dieser Film muss bis zu hohen Temperaturen und Drücken eine hohe mechanische Stabilität bei homogener Ver­teilung der Festschmierstoffpartikel aufweisen.
Ein wesentlicher Anteil an der Erfüllung dieser Anforderun­gen liegt beim Binder. Als Binder wurden in der DE-PS 24 50 716 u.a. genannt: Butadien, und ferner Styrol und Styrol mit Copo­lymeren.
Diese bekannten Binder vermochten aber nicht alle Anforderun­gen, wie sie in zunehmendem Masse an derartige Schmierstoffe gestellt werden, zu erfüllen. Butadien als Binder war zu weich, Styrol wiederum vermochte, auch nicht mit den gängigen Copoly­meren, einen optimalen Film auszubilden. Styrol-Butadien-Copo­lymere wurden auch in der EP-PS 0 164 637 beschrieben, als Be­standteil eines Hochtemperaturschmierstoffes. Diese Formulierung benötigt aber eine erhebliche Menge eines anorganischen Salz­gemisches, das wiederum nachteilige Wirkungen, beispielsweise in MPM-Strassen, bezüglich einer schlechten Wasserbeständig­keit, zeigt.It is known to use lubricants containing, for example, graphite, alkylene polymers or copolymers and a dispersant or film stabilizer for the non-cutting shaping of metals, in particular for lubricating the mandrel, in the manufacture of seamless tubes (DE-PS 24 50 716). Lubricants of this type, especially when used in so-called MPM (multiple pipe mills) lines, have to meet a multitude of requirements. The lubricant must be easy to apply, which can only be achieved economically with the help of an aqueous dispersion. After removal of the carrier, i.e. the water, the lubricant must remain as a waterproof, uniformly thick film, and this film must have high mechanical stability up to high temperatures and pressures with a homogeneous distribution of the solid lubricant particles.
Binder plays a key role in meeting these requirements. As a binder in DE-PS 24 50 716, inter alia: butadiene, and also styrene and styrene with copolymers.
However, these known binders were unable to meet all the requirements that are increasingly being placed on such lubricants. Butadiene as a binder was too soft Styrene, in turn, was unable to form an optimal film, even with the common copolymers. Styrene-butadiene copolymers have also been described in EP-PS 0 164 637, as part of a high-temperature lubricant. However, this formulation requires a considerable amount of an inorganic salt mixture, which in turn has adverse effects, for example in MPM streets, with regard to poor water resistance.

Aufgabe vorliegender Erfindung ist es, einen Schmierstoff vor­zuschlagen, der die genannten Nachteile nicht aufweist.The object of the present invention is to propose a lubricant which does not have the disadvantages mentioned.

Erfindungsgemäß wird das mit einem üblichen Schmierstoff, enthaltend als Binder einen carboxylierten Styrol-Butadienlatex, erreicht.According to the invention this is achieved with a conventional lubricant containing a carboxylated styrene-butadiene latex as a binder.

Vorzugsweise wird als Binder ein carboxylierter Styrol-Buta­dienlatex mit einem Styrolgehalt von mehr als 50% Styrol, vor­zugsweise 70 bis 80% Styrol, eingesetzt.
In der Regel wird der Binder als wässrige Dispersion mit einem Feststoffgehalt von 40 bis 60 Gew.% zu den übrigen Komponenten des Schmierstoffes zugegeben.
Das Dispergiermittel, im vorliegenden Fall im wesentlichen Wasser, muss der Anmachflüssigkeit, ebenfalls im wesentlichen Wasser, der fertigen Schmierstoffdispersion zugerechnet werden.A carboxylated styrene-butadiene latex with a styrene content of more than 50% styrene, preferably 70 to 80% styrene, is preferably used as the binder.
As a rule, the binder is added to the other components of the lubricant as an aqueous dispersion with a solids content of 40 to 60% by weight.
The dispersant, in the present case essentially water, must be added to the mixing liquid, also essentially water, to the finished lubricant dispersion.

Die Zusammensetzung des Schmierstoffes enthält zweckmässig Mengenanteile von 50 bis 80 Gew.% eines Festschmierstoffes oder Festschmierstoffgemisches, vorzugsweise Graphit, 20 bis 50 Gew.% des Binders, berechnet auf seine Trockenmasse, und 0,2 bis 5,0 Gew.% Verdickungsmittel.The composition of the lubricant expediently contains proportions of 50 to 80% by weight of a solid lubricant or solid lubricant mixture, preferably graphite, 20 to 50% by weight of the binder, calculated on its dry matter, and 0.2 to 5.0% by weight of thickener.

Ferner kann es sich als vorteilhaft erweisen, Zusätze wie Netzmittel, Emulgatoren, Biocide und Antioxidantien der Zusam­mensetzung beizusetzen. Deren einzelne Mengenanteile richten sich nach den Erzeugervorschriften oder nach Vorversuchen und betragen gewöhnlich bis zu 2 Gew.%It may also prove advantageous to add additives such as wetting agents, emulsifiers, biocides and antioxidants to the composition. Their individual proportions are based on the regulations of the producer or on preliminary tests and are usually up to 2% by weight.

Die verwendeten einzelnen Bestandteile, die den erfindungsge­mässen Schmierstoff ergeben, lassen sich aus den Reihen nach­folgend genannter Produktegruppen auswählen.The individual components used, which produce the lubricant according to the invention, can be selected from the series of product groups mentioned below.

Als Festschmierstoff können Graphit, MoS₂ (Molybdändisulfid), CaF₂ oder BN eingesetzt werden.
Von den Festschmierstoffen führt Graphit zu besonders guten Ergebnissen. Aus der Reihe der Graphite werden solche mit hoher Reinheit, beispielsweise über 96%, und einer durch­schnittlichen Korngrösse von nicht mehr als 300 µm bevorzugt. Die besten Ergebnisse lassen sich mit einem Graphit von 99,5% Reinheit und einer durchschnittlichen Korngrösse von 100 µm erzielen.Graphite, MoS₂ (molybdenum disulfide), CaF₂ or BN can be used as the solid lubricant.
Of the solid lubricants, graphite leads to particularly good results. From the range of graphites, those with high purity, for example over 96%, and an average grain size of not more than 300 μm are preferred. The best results can be achieved with a graphite of 99.5% purity and an average grain size of 100 µm.

Der Schmierstoff soll zum Gebrauch als 10 bis 60 Gew.%ige wässrige Dispersion vorliegen. Die Dispersion weist zweckmässig eine Viskosität von 500 bis 15000 cp bei 10 bis 30°C auf.The lubricant should be present as a 10 to 60% by weight aqueous dispersion for use. The dispersion expediently has a viscosity of 500 to 15000 cp at 10 to 30 ° C.

Um die Viskosität der Dispersion zu erreichen, wird ein Ver­dicker oder ein Gemisch von Verdickern angewendet. Aus der Reihe von geeigneten Verdickern sind z.B. wasserlösliche Poly­saccharide, Alkylcellulosen, wie Hydroxyalkylcellulose oder Carboxymethylcellulose, Polyvinylalkohole, Polyacrylsäure und deren Derivate, neutralisiert oder nicht neutralisiert, Natur­gummen und deren Derivate (z.B. Guar), Polyvinylpyrrolidon, Polyethylenoxide, gegebenenfalls Mineralien, wie Tone, Mont­morillonit, modifizierter Montmorillonit, Bentonit und Füll­stoffe, wie Naturpech oder Naturasphalt zu nennen.In order to achieve the viscosity of the dispersion, a thickener or a mixture of thickeners is used. From the range of suitable thickeners, e.g. water-soluble polysaccharides, alkyl celluloses, such as hydroxyalkyl cellulose or carboxymethyl cellulose, polyvinyl alcohols, polyacrylic acid and their derivatives, neutralized or not neutralized, natural rubbers and their derivatives (e.g. guar), polyvinyl pyrrolidone, polyethylene oxides, optionally minerals, such as clays, montmorillonite, modified montmoriton fillers, and how to call natural pitch or natural asphalt.

Wie erwähnt, wird der Schmierstoff in Form einer wässrigen Dispersion angewendet. Die wässrige Dispersion des Schmier­stoffes kann auf das Werkzeug, das Tem­peraturen von 80 bis über 350°C aufweisen kann, aufgetragen werden. Bei der Berührung der heissen Oberfläche verdampft der wässrige Träger der Dispersion und es bildet sich ein Film des Schmierstoffes in gleichmässiger Schichtdicke. Der Film des Schmierstoffes ist in homogener wasserfester Form und wird auch von grossen Kühlmittelmengen, die über das Werkzeug fliessen, nicht mehr abgewaschen oder angequollen.As mentioned, the lubricant is applied in the form of an aqueous dispersion. The aqueous dispersion of the lubricant can be applied to the tool, which can have temperatures from 80 to over 350 ° C. When the hot surface is touched, the aqueous carrier of the dispersion evaporates and a film of the lubricant forms in a uniform layer thickness. The film of the lubricant is in a homogeneous, waterproof form and is no longer washed or swollen by large amounts of coolant flowing over the tool.

Der erfindungsgemässe Schmierstoff eignet sich deshalb für die Schmierung von Werkzeug, z.B. Dorn, Dornstange oder Matrize, bei deren Einsatz zur Bearbeitung von Werkstücken, beispiels­weise Luppen oder Rohren, insbesondere bei der Warmverformung von Stahl und dem Walzen von Luppen zu nahtlosen Rohren in sogenannten MPM-Strassen , gegebenenfalls auch in Konti-Stras­sen, Stossbankanlagen, Stangenpressen oder Anstauchpressen.The lubricant according to the invention is therefore suitable for the lubrication of tools, e.g. Mandrel, mandrel bar or die, when used to machine workpieces, e.g. blanks or pipes, especially when hot-forming steel and rolling blanks into seamless pipes in so-called MPM lines, possibly also in continuous lines, push bench systems, bar presses or Upsetting presses.

Die Forderungen, die an den vorliegenden Schmierstoff beim Einsatz in MPM-Strassen gestellt werden, können damit vollum­fänglich erfüllt werden. Bei der vorzugsweisen Anwendungs- und Verarbeitungstemperatur von 80 bis 350°C bildet sich der ange­strebte Film in einer Dicke von 10 bis 100 mµ aus. Der Film ist wasserfest, d.h. die nachfolgende Kühlung mit Wasser be­einflusst den Film in keiner Weise. Bei einer Dorntemperatur von 150 bis 250°C hat der Film gute mechanische Eigenschaften (z.B. eine Ritzhärte von 6,5 N mit dem Ritzhärteprüfung nach Sikkens). Die Temperaturbeständigkeit des Schmierstoffes ist bis zu 350°C ohne weiteres gewährleistet.
Diese Werte konnten mit den bisher beschriebenen Schmierstof­fen gleichzeitig nicht erreicht werden, wie das auch aus den nachfolgend beschriebenen Vergleichsbeispielen ersichtlich ist.The requirements placed on the existing lubricant when used in MPM lines can thus be fully met. At the preferred application and processing temperature of 80 to 350 ° C, the desired film is formed in a thickness of 10 to 100 mµ. The film is waterproof, ie the subsequent cooling with water does not affect the film in any way. At a mandrel temperature of 150 to 250 ° C the film has good mechanical properties (e.g. a scratch hardness of 6.5 N with the Sikkens scratch hardness test). The temperature resistance of the lubricant is easily guaranteed up to 350 ° C.
At the same time, these values could not be achieved with the lubricants described so far, as can also be seen from the comparative examples described below.

Beispiel 1 nach DE-PS 24 50 716 Example 1 according to DE-PS 24 50 716

Formulierung: Feststoffgehalt 30 %, Wasser 70 %
Feststoffe:
74,3% Graphit
23,2% SBR Latex
    (34% Styrol, berechnet auf Feststoffgehalt des Latexes)
2,0% Alkylcellulose
0,5% Natriumsilicat
Viscosität: 3100 cps., pH = 9,2
Formulation: solids content 30%, water 70%
Solids:
74.3% graphite
23.2% SBR latex
(34% styrene, calculated on the solids content of the latex)
2.0% alkyl cellulose
0.5% sodium silicate
Viscosity: 3100 cps., PH = 9.2

Beispiel 2 nach EP-PS 0 164 637 Example 2 according to EP-PS 0 164 637

Formulierung: Feststoffgehalt 30 %, Wasser 70 %
Feststoffe:
54,0% Graphit
11,0% Polyphosphat, unlöslich
5,0% Borax
10,0% Natriumsilicat
18,0% Polystyrol
2,0% Alkylcellulose
Viskosität: 2000 cps., pH = 11,0
Formulation: solids content 30%, water 70%
Solids:
54.0% graphite
11.0% polyphosphate, insoluble
5.0% borax
10.0% sodium silicate
18.0% polystyrene
2.0% alkyl cellulose
Viscosity: 2000 cps., PH = 11.0

Beispiel 3 nach der Erfindung Example 3 according to the invention

Formulierung: Feststoffgehalt 45 %, Wasser 55 %
Feststoffe:
74,2% Graphit
24,3% SBR Latex carboxyliert
    (75% Styrol, berechnet auf Feststoffgehalt des Latexes)
1,0% Ton
0,5% Antioxidant
Viscosität: 2800 cps., pH = 8
Formulation: solids content 45%, water 55%
Solids:
74.2% graphite
24.3% SBR latex carboxylated
(75% styrene, calculated on the solids content of the latex)
1.0% clay
0.5% antioxidant
Viscosity: 2800 cps., PH = 8

Bei den Beispielen 1 - 3 wurden die Feststoffe und das Wasser als Träger zu Dispersionen verarbeitet und zu Prüfzwecken auf metallische Oberflächen, die den Dorn darstellen, versprüht. Die Messresultate sind aus der Tabelle I ersichtlich.

Figure imgb0001
In Examples 1-3, the solids and water as carriers were processed into dispersions and sprayed onto metallic surfaces which represent the mandrel for test purposes. The measurement results are shown in Table I.
Figure imgb0001

Claims (5)

1. Schmierstoff für die Verwendung bei der spanlosen Verfor­mung von Stahl bei hohen Temperaturen, enthaltend einen Festschmierstoff, einen Binder und ein Verdickungsmittel, dadurch gekennzeichnet, daß als Binder ein carboxylierter Styrol-Butadienlatex eingesetzt wird.1. Lubricant for use in the non-cutting shaping of steel at high temperatures, containing a solid lubricant, a binder and a thickener, characterized in that a carboxylated styrene-butadiene latex is used as the binder. 2. Schmierstoff nach Patentanspruch 1, dadurch gekennzeichnet, daß der carboxylierte Styrol-Butadienlatex einen Styrol­gehalt von mehr als 50% Styrol, vorzugsweise 70 bis 80% Styrol, enthält.2. Lubricant according to claim 1, characterized in that the carboxylated styrene-butadiene latex contains a styrene content of more than 50% styrene, preferably 70 to 80% styrene. 3. Schmierstoff nach Patentansprüchen 1 und/oder 2, dadurch gekennzeichnet, daß der Binder als wäßrige Dispersion mit einem Feststoffgehalt von 40 bis 60 Gew.-% zu den übrigen Komponenten des Schmierstoffes zugegeben wird.3. Lubricant according to claims 1 and / or 2, characterized in that the binder is added as an aqueous dispersion with a solids content of 40 to 60 wt .-% to the other components of the lubricant. 4. Schmierstoff nach einem der Patentansprüche 1 bis 3, dadurch gekennzeichnet, daß der Schmierstoff 60 bis 80 Gew.-% Festschmierstoff,vorzugsweise Graphit, 20 bis 50 Gew.-% des Binders nach einem der Ansprüche 1 bis 3, bezogen auf seine Trockenmasse, und 0,2 bis 5,0 Gew.-% Verdickungsmit­tel enthält.4. Lubricant according to one of claims 1 to 3, characterized in that the lubricant 60 to 80 wt .-% solid lubricant, preferably graphite, 20 to 50 wt .-% of the binder according to one of claims 1 to 3, based on its dry weight , and contains 0.2 to 5.0 wt .-% thickener. 5. Verfahren zum Schmieren von Werkzeugen bei der spanlo­sen Verformung von Stahl bei hohen Temperaturen mittels ei­nes Schmierstoffes nach einem der Patentansprüche 1 bis 4, dadurch gekennzeichnet, daß der Schmierstoff als homogene wäßrige Dispersion mit einem Feststoffgehalt von 10 bis 60 Gew.-% auf das heiße Werkzeug aufgetragen wird, wobei der wäßrige Träger der Dispersion verdampft und sich ein homogener wasserfester Schmierstoffilm mit hoher mecha­nischer Festigkeit ausbildet und dann die Kühlung des Werk­zeugs und anschließend die spanlose Verformung eingeleitet wird.5. A method for lubricating tools in the non-cutting deformation of steel at high temperatures by means of a lubricant according to one of the claims 1 to 4, characterized in that the lubricant as a homogeneous an aqueous dispersion having a solids content of 10 to 60% by weight is applied to the hot tool, the aqueous carrier of the dispersion evaporating and a homogeneous, water-resistant lubricant film with high mechanical strength being formed, and then the cooling of the tool and then the non-cutting deformation being initiated becomes.
EP87112493A 1986-09-23 1987-08-27 Lubricant for forging steel Expired - Lifetime EP0261438B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87112493T ATE55145T1 (en) 1986-09-23 1987-08-27 LUBRICANT FOR NON-CUTTING FORMING OF STEEL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3800/86A CH669603A5 (en) 1986-09-23 1986-09-23
CH3800/86 1986-09-23

Publications (3)

Publication Number Publication Date
EP0261438A2 true EP0261438A2 (en) 1988-03-30
EP0261438A3 EP0261438A3 (en) 1988-12-07
EP0261438B1 EP0261438B1 (en) 1990-08-01

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Country Status (9)

Country Link
EP (1) EP0261438B1 (en)
JP (1) JPH0830198B2 (en)
CN (1) CN1011515B (en)
AR (1) AR243593A1 (en)
AT (1) ATE55145T1 (en)
CH (1) CH669603A5 (en)
DE (1) DE3764052D1 (en)
ES (1) ES2016603B3 (en)
SU (1) SU1632373A3 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0412788A1 (en) * 1989-08-09 1991-02-13 Nihon Parkerizing Co., Ltd. Lubrication method for cold plastic working of metallic materials
EP0468278A1 (en) * 1990-07-12 1992-01-29 DAIDO MACHINERY, Ltd. A forging lubricant and a method for forming a lubricant coat on the surface of a linear material
EP0554822A1 (en) * 1992-02-06 1993-08-11 Lonza Ag Mandrel lubricant for the manufacture of seamless tubes
WO1997002334A1 (en) * 1995-07-04 1997-01-23 Timcal Ag Lubricant for pass rollers
WO2002026919A2 (en) * 2000-09-29 2002-04-04 Kelsan Technologies Corp. Friction control compositions
EP1357175A1 (en) * 2002-04-12 2003-10-29 Kelsan Technologies Corporation Friction control composition with enhanced retentivity
RU2716499C1 (en) * 2019-10-03 2020-03-12 Федеральное государственное бюджетное учреждение науки Ордена Трудового Красного Знамени Институт нефтехимического синтеза им. А.В. Топчиева Российской академии наук (ИНХС РАН) Method of producing biodegradable low-temperature grease based on cellulose
CN115679195A (en) * 2021-07-30 2023-02-03 宝山钢铁股份有限公司 Seamless steel tube for automobile driving shaft and manufacturing method thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105695076B (en) * 2016-02-26 2018-09-18 常州高特新材料有限公司 A kind of aqueous diamond wire silicon chip cutting fluid

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Publication number Priority date Publication date Assignee Title
DE2048537A1 (en) * 1970-10-02 1972-04-06 Chemische Fabrik Budenheim, Rudolf A Oetker, 6501 Budenheim Lubricants for hot metal - forming - contg mixed inorganic phosphates in polymer binders
FR2225507A1 (en) * 1973-04-11 1974-11-08 Hoechst Ag
FR2229477A1 (en) * 1973-05-18 1974-12-13 Uss Eng & Consult
DE2450716A1 (en) * 1974-05-08 1975-11-27 Lonza Ag HIGH TEMPERATURE LUBRICANT FOR HOT DEFORMING METALS
US3925214A (en) * 1974-05-28 1975-12-09 Chemclean Corp Hot forming lubricant composition, system and method
FR2295097A1 (en) * 1974-12-19 1976-07-16 Borg Warner LATEX COATING COMPOSITIONS, FOR USE IN THE SURFACE COATING OF ELASTOMERIC FOAM STRUCTURES
US4544690A (en) * 1983-07-27 1985-10-01 Reichhold Chemicals, Incorporated Aqueous rubberized coal tar emulsion

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2048537A1 (en) * 1970-10-02 1972-04-06 Chemische Fabrik Budenheim, Rudolf A Oetker, 6501 Budenheim Lubricants for hot metal - forming - contg mixed inorganic phosphates in polymer binders
FR2225507A1 (en) * 1973-04-11 1974-11-08 Hoechst Ag
FR2229477A1 (en) * 1973-05-18 1974-12-13 Uss Eng & Consult
DE2450716A1 (en) * 1974-05-08 1975-11-27 Lonza Ag HIGH TEMPERATURE LUBRICANT FOR HOT DEFORMING METALS
US3925214A (en) * 1974-05-28 1975-12-09 Chemclean Corp Hot forming lubricant composition, system and method
FR2295097A1 (en) * 1974-12-19 1976-07-16 Borg Warner LATEX COATING COMPOSITIONS, FOR USE IN THE SURFACE COATING OF ELASTOMERIC FOAM STRUCTURES
US4544690A (en) * 1983-07-27 1985-10-01 Reichhold Chemicals, Incorporated Aqueous rubberized coal tar emulsion

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0412788A1 (en) * 1989-08-09 1991-02-13 Nihon Parkerizing Co., Ltd. Lubrication method for cold plastic working of metallic materials
EP0468278A1 (en) * 1990-07-12 1992-01-29 DAIDO MACHINERY, Ltd. A forging lubricant and a method for forming a lubricant coat on the surface of a linear material
EP0554822A1 (en) * 1992-02-06 1993-08-11 Lonza Ag Mandrel lubricant for the manufacture of seamless tubes
WO1997002334A1 (en) * 1995-07-04 1997-01-23 Timcal Ag Lubricant for pass rollers
WO2002026919A2 (en) * 2000-09-29 2002-04-04 Kelsan Technologies Corp. Friction control compositions
WO2002026919A3 (en) * 2000-09-29 2002-05-16 Kelsan Technologies Corp Friction control compositions
US7045489B2 (en) 2000-09-29 2006-05-16 Kelsan Technologies Corp. Friction control compositions
EP1357175A1 (en) * 2002-04-12 2003-10-29 Kelsan Technologies Corporation Friction control composition with enhanced retentivity
RU2716499C1 (en) * 2019-10-03 2020-03-12 Федеральное государственное бюджетное учреждение науки Ордена Трудового Красного Знамени Институт нефтехимического синтеза им. А.В. Топчиева Российской академии наук (ИНХС РАН) Method of producing biodegradable low-temperature grease based on cellulose
CN115679195A (en) * 2021-07-30 2023-02-03 宝山钢铁股份有限公司 Seamless steel tube for automobile driving shaft and manufacturing method thereof
CN115679195B (en) * 2021-07-30 2023-10-17 宝山钢铁股份有限公司 Seamless steel tube for automobile driving shaft and manufacturing method thereof

Also Published As

Publication number Publication date
EP0261438A3 (en) 1988-12-07
ES2016603B3 (en) 1990-11-16
AR243593A1 (en) 1993-08-31
EP0261438B1 (en) 1990-08-01
CN87106375A (en) 1988-04-06
CN1011515B (en) 1991-02-06
DE3764052D1 (en) 1990-09-06
JPS6389593A (en) 1988-04-20
ATE55145T1 (en) 1990-08-15
CH669603A5 (en) 1989-03-31
JPH0830198B2 (en) 1996-03-27
SU1632373A3 (en) 1991-02-28

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