WO2020169800A1 - Schmierstoff für die heissumformung von metallen - Google Patents
Schmierstoff für die heissumformung von metallen Download PDFInfo
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- WO2020169800A1 WO2020169800A1 PCT/EP2020/054621 EP2020054621W WO2020169800A1 WO 2020169800 A1 WO2020169800 A1 WO 2020169800A1 EP 2020054621 W EP2020054621 W EP 2020054621W WO 2020169800 A1 WO2020169800 A1 WO 2020169800A1
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- lubricant
- cellulose
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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
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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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/10—Compounds containing silicon
- C10M2201/102—Silicates
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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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/10—Compounds containing silicon
- C10M2201/102—Silicates
- C10M2201/1026—Silicates used as thickening agents
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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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/10—Compounds containing silicon
- C10M2201/102—Silicates
- C10M2201/103—Clays; Mica; Zeolites
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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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/12—Glass
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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
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/022—Ethene
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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
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- 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
- C10M2209/062—Vinyl esters of saturated carboxylic or carbonic acids, e.g. vinyl acetate
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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
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/12—Polysaccharides, e.g. cellulose, biopolymers
- C10M2209/126—Polysaccharides, e.g. cellulose, biopolymers used as thickening agents
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- 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
- C10N2030/04—Detergent property or dispersant property
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- 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
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- 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
- C10N2030/16—Antiseptic; (micro) biocidal or bactericidal
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- 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
- C10N2030/18—Anti-foaming property
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- 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
- C10N2030/40—Low content or no content compositions
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- 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
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- 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
Definitions
- the invention relates to an essentially graphite-free and boron-free mandrel bar lubricant for use in the hot forming of metals for the production of seamless tubes, in particular in so-called continuous processes or push bench processes.
- lubricants are required that ensure optimal sliding of the metal between the processing tools at high processing temperatures.
- temperatures of 1,100 to 1,300 ° C can occur. If hard or difficult to deform metals are processed, the processing tools can wear out quickly. High coefficients of friction between tool and workpiece also lead to increased energy consumption during machining.
- the shaping of seamless tubes takes place in the main process step by rolling a prefabricated hollow block at around 1200 ° C to 1300 ° C over a mandrel bar.
- the mandrel bar is removed from the rolled pipe blank and cooled in a cooling bath or by spray cooling with water and prepared for the next rolling process.
- This preparation of the mandrel rod after cooling also includes lubrication in which the lubricant is sprayed onto the mandrel rod.
- This lubrication is essential for optimal sliding of the hollow block on the mandrel bar during the rolling process and is also decisive for the later quality and dimensional accuracy of the pipe, in particular for the condition of the inner surface of the pipe.
- the mandrel bar lubricants used must have good lubricating properties and at the same time withstand the high processing temperatures.
- the good lubricating properties not only include the fact that the lubricants are suitable for reducing the coefficient of friction between the mandrel bar, but also that they have good wetting properties and that they form a lubricant film that is as continuous as possible with a sufficient layer thickness on the mandrel bar.
- the lubricants contain additives that additionally reduce the formation of scale on the surface of the metal being worked, such as boron compounds, e.g. Boric acid salts which, due to their solubility in water, can get into the wastewater from the rolling process, which, however, leads to considerable disposal problems because of their teratogenic effect.
- additives that additionally reduce the formation of scale on the surface of the metal being worked, such as boron compounds, e.g. Boric acid salts which, due to their solubility in water, can get into the wastewater from the rolling process, which, however, leads to considerable disposal problems because of their teratogenic effect.
- Known lubricants can be divided into graphite-containing and graphite-free lubricants.
- Graphite-free lubricants are also referred to as “white” lubricants because they are not colored by the strong inherent color of graphite.
- Graphite is a suitable lubricant additive, especially for high-temperature applications, such as the hot forming of metals, because graphite is particularly heat-resistant and, both in combination with mineral oils and inorganic salts, has particularly good lubricating properties.
- a disadvantage of graphite-containing lubricants is that the high carbon content can lead to carburization of the metal surface of the workpiece. This can result in defective end products with poor processing or material properties. The result is high workpiece scrap.
- the use of graphite in the work environment counteracts health concerns, which make particularly complex protective measures necessary for the people working in the work environment.
- a group of lubricants which can be graphite or graphite-free, contain salts or salt mixtures that melt on the hot surface of the workpiece and, through the melt, form a lubricating separating layer between the workpiece and the tool.
- salts or salt mixtures that melt on the hot surface of the workpiece and, through the melt, form a lubricating separating layer between the workpiece and the tool.
- only certain salts are suitable for this, and some of them have such high melting temperatures that the lubricants are only fully usable when they have reached operating temperature. This is particularly disadvantageous when the processing machines are started up when the tools or workpieces are still cold.
- borax is used as a low-melting salt.
- lubricants containing borax can also cause the tool and workpiece to stick together, with the result that the tool is damaged or the machines come to a standstill. Furthermore, borax-containing lubricants adversely affect the metal surface of the tool or workpiece.
- Other known lubricants use raw table salt, which, however, can lead to material being removed from the workpiece and material being deposited elsewhere and thus to scoring. In addition, table salt leads to increased metal corrosion on the systems, which results in high maintenance costs.
- Water-soluble lubricants based on alkali phosphates and alkali borates which are also used in a mixture with various metal oxides such as zinc oxide or iron oxide, attack the surface of the metal to be processed.
- Another group of high-temperature lubricants contains alkali phosphate glasses or silicate glasses with various additives such as boron or aluminum. These lubricants have good lubricating properties, but are poorly soluble in water, which makes their removal from the machined workpiece considerably more difficult and requires a great deal of technical effort.
- mandrel bar lubricants with a high graphite content are still predominantly used due to the high demands on lubricating properties and temperature resistance.
- Graphite-free or low-graphite (“white”) mandrel bar lubricants are rarely used despite the disadvantages described above and others.
- Lubricants suitable for this are expensive and require large amounts to be used, which has a negative effect on the production costs and thus on the costs of the product.
- CN-A-104 694 240 discloses a graphite-free lubricant composition which contains 10-90% by weight of mineral clay, 0-5% by weight of stearate, 0.1-5% by weight of a thickener, preferably sodium polyacrylate, 5-30% by weight of water-soluble borate and / or boric acid and other additives such as surface-active substances and polymers.
- CN-A-102 732 367 discloses a graphite-free lubricant composition which contains 15-20% by weight of glass powder, 2.5-8% by weight of a white solid lubricant, 0.5-3.5% by weight of a thickener, and other additives such as surfactants and resins.
- the white solid lubricant comprises one or more compounds from the group consisting of mica, talc and boron nitride. Gelatine or cellulose are used as thickeners.
- the known lubricants for the hot forming of metals therefore have a number of disadvantages due to and depending on their respective composition, such as health and environmental hazards and the associated protective measures required, high consumption due to the high amounts required, high costs of the components of the compositions, unfavorable coefficients of friction, adverse effects on the manufacturing process and / or the properties of the manufactured product, such as sticking or welding Tool and workpiece, carburization or other damage to the workpiece surface, unfavorable wetting properties and / or unfavorable layer thicknesses.
- the object of the present invention was therefore to provide a mandrel bar lubricant which overcomes the disadvantages of the prior art and which is particularly suitable as a mandrel bar lubricant for the hot forming of metals in the production of seamless tubes in continuous processes or push bench processes and compared to those in these processes so far
- the graphite-based lubricants used contain no or at most a small amount of graphite, has good coefficients of friction and good wetting properties and, compared to known lubricants, requires lower quantities and / or can be produced more cost-effectively than known lubricants for the same application
- a lubricant for the hot forming of metals in particular for lubricating the mandrel bar and / or the hollow block in the production of seamless tubes, the lubricant containing at least the following components, based on the solid content:
- a solid lubricant consisting of a mixture of talc and a potassium mica, preferably phlogopite, muscovite or a mixture of both, particularly preferably phlogopite, the ratio of talc to potassium mica in the solid lubricant 2, 0 to 5.0,
- an adhesive selected from a polyvinyl acetate, sodium water glass and dextrin or a mixture of the aforementioned, preferably ethylene-vinyl acetate copolymer (EVA),
- EVA ethylene-vinyl acetate copolymer
- a thickener selected from hydroxycellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, methyl cellulose, ethyl cellulose, methylethyl cellulose, hydroxyethylmethyl cellulose, hydroxypropylmethyl cellulose, ethylhydroxymethyl cellulose, carboxymethylhydroxycellulose, modified starch and xanthine, organic dextrin, Gum, preferably xanthan gum, 0 to 10% by weight of further auxiliaries, preferably selected from defoamers, dispersants and biocides and not more than 10% by weight of graphite, preferably not more than 5% by weight of graphite, particularly preferably no graphite.
- An essential advantage of the lubricant according to the invention is that it has very good coefficients of friction and wetting properties, especially in the production of seamless tubes in continuous processes or impact bench processes, which, with the same or lower layer thicknesses or quantities used, are comparable or comparable to those of graphite-containing lubricants currently used in these processes are even superior to these.
- the lubricant according to the invention can therefore replace the graphite-containing lubricants previously used in continuous processes or shock bench processes and at the same time save costs, disposal expenditure and expenditure on occupational safety measures.
- the lubricant according to the invention preferably contains no more than 5% by weight of boron-containing compounds, particularly preferably no boron-containing compounds such as boric acid, borax, boric acid salts or borate-containing minerals, which are often used in known lubricants for the hot forming of metals.
- the lubricant according to the invention can therefore overcome the disadvantages of graphite-based and boron-containing lubricants.
- the lubricant is sprayed onto the cooled mandrel bar as an aqueous suspension in preparation for the subsequent rolling step, but the mandrel bar still has a temperature of around 100 ° C.
- An essential aspect for a good lubricating performance of the lubricant is the complete, continuous wetting of the mandrel rod and in particular the layer thickness of the lubricant on the wetted mandrel rod.
- the lubricant according to the invention is characterized by good adhesion to the mandrel bar and good and uniform wetting of the surface of the mandrel bar.
- the layer thickness or amount of lubricant required for good lubrication in these processes is the same or even less than with graphite-containing lubricants currently used in these processes.
- the layer thickness or the amount of lubricant used refers to the amount of solid lubricant on a specific surface of the tool, ie the mandrel bar, measured in grams of solid lubricant per square meter [g / m 2 ].
- a suitable layer thickness of the lubricant according to the invention is of the order of magnitude about 30 to 150 g / m 2 surface area of the mandrel bar, preferably 50 to 120 g / m 2 , particularly preferably 70 to 100 g / m 2 , depending on the composition of the lubricant.
- the wetting of the surface of the mandrel bar and the layer thickness can be adjusted by the amount of lubricant suspension sprayed onto the surface of the mandrel bar or the duration of the spray, as well as by the viscosity and adhesion of the suspension. It has been shown that the same or better lubricating effect can be achieved with the lubricant according to the invention compared to commercially available graphite-containing lubricants for the same purpose with the same or even smaller layer thickness or amount used. This means that considerable costs can be saved in the production of seamless tubes compared to the currently used graphite-containing lubricants.
- An essential feature of the lubricant according to the invention is the proportion of solid lubricant, which is a mixture of talc and potassium mica and the ratio of talc to potassium mica being at least 2.0 and not exceeding 5.0.
- the ratio of talc to potassium mica in the solid lubricant is 2.5 to 4.5, preferably 3.0 to 4.0, particularly preferably 3.3 to 3.8,
- Talc which according to the invention is one of the main components of the solid lubricant in the lubricant according to the invention, is the pulverized form of the mineral talc, a sheet silicate (phyllosilicate), more precisely magnesium silicate hydrate. Depending on the modification, it crystallizes as talc-1A in the triclinic or as talc-2M in the monoclinic crystal system.
- Potassium mica which according to the invention form the further main component of the solid lubricant in the lubricant according to the invention, but is contained in a smaller amount than talc, is also sheet silicates (phyllosilicates), which, however, have a potassium ion.
- Potassium mica suitable according to the invention include mica
- muscovite-celadonite series dioctahedral
- KA AISi30io (OH) 2
- aluminoseladonite K AI (Mg, Fe 2+ ) [SUOIO (OH) 2] ferro-aluminoseladonite,
- K AI Mg, Fe 2+ ) [Si 4 Oio (OH) 2 ], celadonite, K Fe 3+ (Mg, Fe 2+ ) [Si 4 Oi 0 (OH) 2 ], ferroseladonite,
- Tainiolite group Tainiolite, K Li Mg2 [S1 4 O 10 F 2 ],
- the potassium mica in the solid lubricant of the lubricant according to the invention therefore contains at least 60% by weight phlogopite, preferably at least 80% by weight phlogopite, particularly preferably at least 90% by weight phlogopite. Very particular preference is given to using only phlogopite as the potassium mica.
- the lubricant according to the invention is sprayed onto the mandrel rod, possibly also the hollow block, as a suspension of the solids in water during the hot forming of metals, in particular to lubricate the mandrel bar and / or the hollow block in the production of seamless tubes.
- the lubricant according to the invention also contains 10 to 30% by weight of an adhesive and 2 to 10% by weight of a thickener.
- Ethylene-vinyl acetate copolymer (EVA) has proven to be an adhesive and xanthan gum has proven particularly advantageous as a thickener.
- EVA Ethylene-vinyl acetate copolymer
- xanthan gum has proven particularly advantageous as a thickener.
- other suitable adhesives and thickeners as mentioned herein can also be used.
- the person skilled in the art will be able to easily determine the quantities of adhesive and thickener suitable for the overall composition of the lubricant in order to ensure good processability and usability of the lubricant suspension in the available one for the respective application Spray system, wetting, adhesion and layer thickness formation on the tool surface.
- the lubricant according to the invention also contains 0 to 10% by weight of further auxiliaries which can be used with advantage in lubricants of the type mentioned here and depending on the application.
- auxiliaries preferably include defoamers, dispersants and biocides.
- Defoamers are intended to prevent or at least reduce disadvantageous foam formation when the lubricant suspension is sprayed onto the tool, for example the mandrel bar.
- Suitable defoamers include polyglycols, amorphous and / or hydrophobic silica, polysiloxanes, dimethylpolysiloxanes, organically modified polysiloxanes and naphthalene condensates.
- Dispersants can be used with advantage in order to improve the distribution of the solids of the lubricant in the aqueous suspension and to prevent or slow down the sedimentation of the solids in the suspension.
- Suitable dispersants include C16-C18 alcohols, ethoxylate salts, sodium and potassium tripolyphosphates, polyethylene glycol and sodium silicate.
- Biocides can be used with advantage to prevent or at least reduce the multiplication of microorganisms, such as bacteria, fungi and / or yeasts, in the lubricant, in particular when the lubricant is stored for a long time.
- Suitable biocides include 1,2-benzisothiazol-3 (2H) -one, 5-chloro-2-methyl-4-isothiazolin-3-one, 2-methyl-2H-isothiazol-3-one, 2-octyl- 2H-isothiazol-3-one, ethylenedioxydimethanol, tetrahydro-1, 3,4,6-tetrakis (hydroxymethyl) imidazo [4,5- d] imidazol-2,5 (1H, 3H) -dione, 2-bromo- 2-nitropropane-1,3-diol, 2,2-dibromo-2-carbamoylacetonitrile, sodium hypochlorite and sodium chlorite.
- a particular advantage of the lubricant according to the invention is that it can replace graphite-based lubricants currently used in continuous processes and push bench processes for the production of seamless pipes and thus can overcome the disadvantages of using graphite. Nevertheless, graphite is an excellent lubricant and, due to its heat resistance, is particularly suitable for the hot forming of metals. The graphite-based lubricants previously used for these applications therefore regularly contain high proportions of graphite.
- the lubricant according to the invention is intended to overcome the disadvantages of graphite-containing lubricants and replace them, in embodiments of the lubricant according to the invention it can be advantageous to add a certain proportion of graphite in order to adjust and further improve the properties of the lubricant.
- the proportion of graphite in the lubricant must not be more than 10% by weight of graphite, preferably not more than 5 % By weight graphite.
- such a proportion of graphite in the lubricant according to the invention is significantly lower than the high proportion of graphite in previously used graphite-containing lubricants and is therefore not associated with the disadvantages of graphite to the known extent.
- the lubricant according to the invention particularly preferably does not contain any graphite.
- the invention further comprises the use of the lubricant composition according to the invention for lubricating the mandrel rod and / or the hollow block in the production of seamless tubes by hot forming of metals, preferably in the continuous process or push bench process.
- the lubricant is expediently sprayed as an aqueous suspension onto the mandrel bar, which has a temperature of approx. 100 ° C, before it is introduced into the hollow block.
- the lubricant according to the invention is sprayed onto the mandrel bar in a layer thickness (A set amount) of 30 to 150 g / m 2 surface area.
- the layer thickness (amount used) is preferably 50 to 120 g / m 2 of sprayed surface, particularly preferably 70 to 100 g / m 2 of sprayed surface.
- Viscosity measurements were made with a R / S Plus rotational rheometer from Brookfield (AME-TEK GmbH - BU Brookfield, Lorch, Germany) with a coaxial cylinder (40 mm spindle) in accordance with DIN 53019 and according to the manufacturer's instructions and using the Rheo3000 software at a sample temperature from 20 ° C +/- 0.4 ° C.
- the tribometer consists of an inductively heated, rotating disc made of Thermudur2342 EFS steel with a diameter of 280 mm and a table that can be moved hydraulically in the direction of the rotating disc, on which a test body made of S355MC steel is mounted.
- the rotating disk was heated to 100 ° C ( ⁇ 10 ° C) and sprayed with the lubricant in the desired layer thickness. The distance between the spray nozzle and the window surface was 10 mm.
- the lubricant was applied in a layer thickness of 80 g / m 2 and allowed to act for about 5 seconds before the measurement.
- the disk was rotated at 10 rpm. rotates.
- the test specimen was heated to 1230 ° C ( ⁇ 20 ° C), pressed against the rotating disk by means of the hydraulically movable table with a contact force (FN) of 32,000 N ( ⁇ 2,000 N) and the radial force acting on the disk perpendicular to the contact force (FR) measured over a period of several seconds.
- the layer thickness of a lubricant applied to the disk of the tribometer under the spraying conditions was checked by applying a magnetic tape film to the surface of the disk before the lubricant was sprayed on and the lubricant was then sprayed on.
- the magnetic tape film was removed, weighed with the lubricant applied to it and the layer thickness was determined from the difference to the weight of the film not exposed to the lubricant.
- the graphite-based mandrel bar lubricant PHOSPHATHERM ® 120 GLW 30 (hereinafter referred to as "PH120") from Chemische Fabrik Budenheim KG, which is available as a 30% suspension, was used as a comparative lubricant.
- Muscovite 1 chemical composition: S1O 2 : 44%, Al 2 O 3 : 31%, K 2 O: 9% Fe203: 3%; mean particle size (D50): 45 pm
- Muscovite 2 chemical composition: S1O 2 : 51.5%, AI 2 O 3 : 27.0%, K 2 O: 10.0%, Fe203:
- Adhesive vinyl acetate-ethylene copolymer (EVA)
- Figure 1 shows the coefficients of friction of the compositions examined.
- the formulations B and E with a ratio of talc to phlogopite below 3.3 and above 3.8 showed similar results as formulation F with phlogopite alone.
- Formulation A showed similar results as formulation G with talc alone.
- Formulation H in which mica muscovite (muscovite 1) was used instead of phlogopite, showed significantly worse results than formulation F with phlogopite alone.
- Different amounts of solid lubricant from talc plus phlogopite were significantly below the comparison formulation PH120 with the graphite-based product according to the prior art.
- FIG. 2 shows the coefficients of friction of the compositions examined.
- the ratio of talc to phlogopite in the range from 3.3 to 3.8 which has proven to be particularly advantageous with regard to the achievable coefficient of friction, approximately 13% talc plus phlogopite (formulations S and T) had comparably good coefficients of friction as with 19 , 5% talc plus phlogopite (recipes C and D).
- formulations R and U the coefficients of friction were higher, but still significantly below the comparison formulation PH 120 with the prior art product based on graphite.
- FIG. 3 shows the coefficient of friction of the compositions examined.
- alternative mica muscovite 1 and muscovite 2 were compared with phlogopite in formulation C and with the same amount of pure graphite instead of talc plus mica in formulation I. While the best friction values were achieved with the same amount of phlogopite (formulation C), the mica muscovite 1 and muscovite 2 (formulations L and M) also showed good friction values, which were only slightly above the use of the same total amount of pure graphite instead of talc plus mica (Recipe I) were.
- FIG. 4 shows the coefficients of friction of PH 120 and composition C with different layer thicknesses.
- the comparison of different layer thicknesses of recipe C with the comparative lubricant PH 120 shows again that recipe C according to the invention is even with the smallest
- the amount used with a layer thickness of only 30 g / m 2 still provides better, but at least comparable coefficients of friction compared to the comparative lubricant PH 120 when used twice to more than three times the amount used.
- the composition “C” used in the preceding comparisons contains 25% (% by weight) solids and 75% water.
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Abstract
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BR112021009900-0A BR112021009900A2 (pt) | 2019-02-22 | 2020-02-21 | Lubrificante para a conformação a quente de metais |
JP2021540272A JP2022521134A (ja) | 2019-02-22 | 2020-02-21 | 金属の熱間成形用の潤滑剤およびその使用方法 |
US17/310,710 US11485929B2 (en) | 2019-02-22 | 2020-02-21 | Lubricant for the hot forming of metals |
KR1020217020708A KR20210127136A (ko) | 2019-02-22 | 2020-02-21 | 금속의 열간 성형을 위한 윤활제 |
CN202080015980.6A CN113474442B (zh) | 2019-02-22 | 2020-02-21 | 用于金属热成形的润滑剂 |
EP20706258.9A EP3927797B1 (de) | 2019-02-22 | 2020-02-21 | Schmierstoff für die heissumformung von metallen |
CA3119484A CA3119484C (en) | 2019-02-22 | 2020-02-21 | Lubricant for the hot forming of metals |
EA202192274A EA202192274A1 (ru) | 2019-02-22 | 2020-02-21 | Смазка для использования при горячей обработке металлов давлением |
ZA2021/04194A ZA202104194B (en) | 2019-02-22 | 2021-06-18 | Lubricant for the hot forming of metals |
SA521430126A SA521430126B1 (ar) | 2019-02-22 | 2021-08-22 | مزلق لتشكيل المعادن على الساخن |
Applications Claiming Priority (2)
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DE102019104540.1A DE102019104540B4 (de) | 2019-02-22 | 2019-02-22 | Schmierstoff und dessen Verwendung für die Heißumformung von Metallen |
DE102019104540.1 | 2019-02-22 |
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WO2020169800A1 true WO2020169800A1 (de) | 2020-08-27 |
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PCT/EP2020/054621 WO2020169800A1 (de) | 2019-02-22 | 2020-02-21 | Schmierstoff für die heissumformung von metallen |
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US (1) | US11485929B2 (de) |
EP (1) | EP3927797B1 (de) |
JP (1) | JP2022521134A (de) |
KR (1) | KR20210127136A (de) |
CN (1) | CN113474442B (de) |
BR (1) | BR112021009900A2 (de) |
CA (1) | CA3119484C (de) |
DE (1) | DE102019104540B4 (de) |
EA (1) | EA202192274A1 (de) |
SA (1) | SA521430126B1 (de) |
WO (1) | WO2020169800A1 (de) |
ZA (1) | ZA202104194B (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113444565A (zh) * | 2021-07-26 | 2021-09-28 | 湖南金裕环保科技有限公司 | 一种高温水基芯棒润滑剂、制备方法及其应用 |
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JPH04331293A (ja) * | 1991-05-02 | 1992-11-19 | Yushiro Chem Ind Co Ltd | 熱間加工用潤滑剤 |
JP4017225B2 (ja) * | 1997-12-02 | 2007-12-05 | ユシロ化学工業株式会社 | 熱間金属加工用潤滑剤及び熱間鋼材加工用潤滑剤並びに熱間金属加工方法及び熱間鋼材加工方法 |
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JP2005097605A (ja) * | 2003-09-04 | 2005-04-14 | Sumitomo Metal Ind Ltd | 継目無鋼管加工潤滑剤組成物 |
JP2005220267A (ja) | 2004-02-06 | 2005-08-18 | Nippon Steel Corp | 継ぎ目無し鋼管圧延用潤滑剤 |
DE102004045128A1 (de) | 2004-09-17 | 2006-03-23 | Chemische Fabrik Budenheim Kg | Schmiermittel zum Schmieren von erhitzten Metallgegenständen |
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- 2020-02-21 EP EP20706258.9A patent/EP3927797B1/de active Active
- 2020-02-21 CA CA3119484A patent/CA3119484C/en active Active
- 2020-02-21 CN CN202080015980.6A patent/CN113474442B/zh active Active
- 2020-02-21 US US17/310,710 patent/US11485929B2/en active Active
- 2020-02-21 WO PCT/EP2020/054621 patent/WO2020169800A1/de unknown
- 2020-02-21 EA EA202192274A patent/EA202192274A1/ru unknown
- 2020-02-21 BR BR112021009900-0A patent/BR112021009900A2/pt active Search and Examination
- 2020-02-21 KR KR1020217020708A patent/KR20210127136A/ko unknown
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2021
- 2021-06-18 ZA ZA2021/04194A patent/ZA202104194B/en unknown
- 2021-08-22 SA SA521430126A patent/SA521430126B1/ar unknown
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CA3119484A1 (en) | 2020-08-27 |
DE102019104540B4 (de) | 2021-08-19 |
BR112021009900A2 (pt) | 2021-09-08 |
US11485929B2 (en) | 2022-11-01 |
ZA202104194B (en) | 2022-10-26 |
KR20210127136A (ko) | 2021-10-21 |
CA3119484C (en) | 2023-09-19 |
EP3927797A1 (de) | 2021-12-29 |
SA521430126B1 (ar) | 2023-11-30 |
CN113474442A (zh) | 2021-10-01 |
EA202192274A1 (ru) | 2022-01-14 |
EP3927797B1 (de) | 2022-12-28 |
CN113474442B (zh) | 2022-11-29 |
JP2022521134A (ja) | 2022-04-06 |
US20220162517A1 (en) | 2022-05-26 |
DE102019104540A1 (de) | 2020-08-27 |
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