WO2021139973A1 - Élément métallique renfermant du fer pourvu d'une couche de brunissage alliée - Google Patents

Élément métallique renfermant du fer pourvu d'une couche de brunissage alliée Download PDF

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Publication number
WO2021139973A1
WO2021139973A1 PCT/EP2020/086276 EP2020086276W WO2021139973A1 WO 2021139973 A1 WO2021139973 A1 WO 2021139973A1 EP 2020086276 W EP2020086276 W EP 2020086276W WO 2021139973 A1 WO2021139973 A1 WO 2021139973A1
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WO
WIPO (PCT)
Prior art keywords
metal component
burnishing
layer
alloyed
metal
Prior art date
Application number
PCT/EP2020/086276
Other languages
German (de)
English (en)
Inventor
Thilo Von Schleinitz
Original Assignee
Aktiebolaget Skf
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 Aktiebolaget Skf filed Critical Aktiebolaget Skf
Publication of WO2021139973A1 publication Critical patent/WO2021139973A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/64—Special methods of manufacture
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/60—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using alkaline aqueous solutions with pH greater than 8
    • C23C22/62—Treatment of iron or alloys based thereon
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2206/00—Materials with ceramics, cermets, hard carbon or similar non-metallic hard materials as main constituents
    • F16C2206/40—Ceramics, e.g. carbides, nitrides, oxides, borides of a metal
    • F16C2206/42—Ceramics, e.g. carbides, nitrides, oxides, borides of a metal based on ceramic oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2223/00—Surface treatments; Hardening; Coating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2233/00—Monitoring condition, e.g. temperature, load, vibration

Definitions

  • the present invention relates to a ferrous metal component with an alloyed burnishing layer according to patent claim 1. Furthermore, the present invention relates to a method for producing such a metal component according to patent claim 5.
  • coatings can be favorably influenced by incorporating additional substances.
  • black oxide layers which are conversion layers and only as a direct reaction of the black oxide solution with the surface of the metal component or the iron of the metal component, it is not possible to reduce its wear and tear.
  • an alloy of the resulting layer is possible within the framework of a burnishing. Such an alloy can add additional properties to the layer that is created during the burnishing.
  • An iron-containing metal component with an alloyed burnishing layer applied to the metal component by means of burnishing is therefore proposed.
  • the alloyed burnishing layer ensures that a completely covering burnishing layer with a measurable content of alloying elements is created.
  • This alloyed burnishing layer in particular the choice of the added alloying elements, can improve the wear of the layer compared to a pure burnishing layer.
  • the other properties of a browning layer are retained in order to provide additional functions such as corrosion protection, improved lubricant adhesion, hydrogen barrier, protection against oil additives, etc. for as long as possible.
  • the alloyed burnishing layer can lose about 50% of its thickness during the running-in of the metal component, e.g. a roller bearing ring or a rolling element, which smooths the production roughness of the metal component. Thereafter, however, the alloyed burnishing layer ensures that the layer remains in place for as long as possible, in particular over the life of the metal component, that is, it does not wear out completely like a pure burnishing layer.
  • the alloyed black oxide layer improves the wear resistance and / or the hardness compared to a pure black oxide layer.
  • the alloyed burnishing layer has iron oxide, which itself is produced by the burnishing, ie by a reaction of a burnishing solution with the iron of the metal component.
  • the alloyed burnishing layer has additive metal alloy elements. Since the burnishing layer itself has a high content of oxygen due to the iron oxide, it is preferable to use metal alloy elements which show no reaction with respect to oxygen or are at least inert. If alloying elements are used that are reactive with respect to oxygen, this can lead to damage to the black oxide layer. Furthermore, in this case, the metal alloy elements would if they are added to the burnishing solution, already react with it and compete with the iron of the metal component.
  • the metal alloy elements can thus be, for example, metal oxide or elements that are inert with respect to oxygen. It is particularly advantageous to alloy the iron oxide layer (i.e. the burnishing layer) with another metal oxide.
  • tungsten oxide preferably tungsten trioxide, can be used as the metal alloy element.
  • Other alloying elements are also possible.
  • alloying is generally understood to mean that non-iron oxide additional elements or additional compounds, i.e. metal alloy elements, are added to the burnishing layer consisting of iron oxides in order to influence the technical layer properties.
  • additional compounds can be incorporated into the layer so finely that no agglomerates of the additional elements can be seen in the scanning electron microscope under 5000x magnification, the layer thus appears optically and analytically homogeneous, and a content of additional elements in the entire layer can be detected in EDX.
  • a method for producing a metal component as described above includes the formation of an alloyed burnishing layer by means of burnishing.
  • the alloyed burnishing layer contains both iron oxide from the burnishing and embedded additive metal alloying elements.
  • the alloyed burnished layer is not a burnished layer on which another substance is deposited on top, but rather a layer that is both a burnished layer and contains metal alloy elements.
  • This layer can be produced in two different ways, as explained below.
  • the alloyed burnishing layer is formed by immersing the metal component in a burnishing solution, the burnishing solution containing metal alloy elements.
  • the burnishing can be done in a strongly alkaline bath (eg made of sodium hydroxide and nitrite / nitrate) at approx. 150 ° C.
  • the burnishing solution can be provided as a bath for immersing the metal component, but also as a solution for applying to the surface of the metal component.
  • the burnishing bath is strongly mixed due to the boiling and insoluble substances, i. H. the metal alloy elements, at least partially in suspension, it is possible to add the metal alloy elements to the metal component simultaneously with the production of the burnishing layer. In this way, a completely opaque finish with a measurable content of metal alloy elements is created.
  • Burnishing baths can generate large amounts of sludge, which settles on the bottom of the container and has to be removed manually with shovels / scrapers on a regular basis.
  • the concentration of the metal alloy elements in the burnishing bath should be monitored during the formation of the alloyed burnishing layer and possibly added again (e.g. if the concentration falls below a defined threshold value).
  • the metal component is first immersed in a pre-immersion solution that contains metal alloy elements.
  • a pre-immersion solution that contains metal alloy elements.
  • the metal alloy elements are deposited on a surface of the metal component.
  • the pre-dip solution can be hot and alkaline, for example a sodium hydroxide solution, and contains either the metal alloy elements or one of their precursors.
  • the use of a preliminary stage can in particular reduce costs.
  • this can be tungsten oxide or disodium tungstate dihydrate.
  • Other alloy elements are also possible.
  • precipitates of the metal alloy elements form on the surface of the metal component. These are preferably evenly distributed and are rinse-proof.
  • germ cells can use a highly diluted phosphating activation solution (in which the metal component can be immersed before the alloy bath) to set starting points for subsequent precipitations.
  • a highly diluted phosphating activation solution in which the metal component can be immersed before the alloy bath
  • the use of such germ cells is only optional.
  • the alloyed burnishing layer is then formed by dipping the metal component into a burnishing bath or by applying the burnishing solution to the metal component. More precisely, the metal component surface is provided with adhering metal alloy elements, for example in the form of spheres, by the pre-immersion. The surface is not covered with the beads, but they are randomly but evenly distributed. Between the spheres there are always several spherical diameters free from an uncoated surface. In the blackening bath, these globules slowly dissolve and the metal alloy elements are deposited in the blackened layer. The resulting layer does not contain any irregular structures, but is homogeneous and contains the evenly distributed metal alloy elements as well as the iron oxide.
  • the method has to expose the iron of the metal component before the alloyed burnished layer is formed.
  • the metal component can be rinsed off after immersion in the Vorauchlö solution in order to remove superfluous metal alloy elements.
  • Fig. 1 shows a possible schematic sequence of a method for producing a metal component 2 with an alloyed burnishing layer 14.
  • the metal component 2 is shown here as a roller bearing ring, but any other metal component can also be provided with such an alloyed burnishing layer 10 .
  • the metal component 2 is first immersed in a pre-immersion solution 4.
  • the Vorauchlö solution 4 can be a hot, alkaline solution containing metal alloy elements.
  • the metal alloy elements are deposited on the surface of the metal component 2, as is shown here by way of example with beads 6.
  • the deposited metal alloy elements 6 have a certain distance from one another, which can be achieved, for example, by activating germ cells on the surface of the metal component 2. By activating such germ cells it is achieved that the metal alloy elements 6 attach to these germ cells and not to other points of the metal component 2.
  • the metal component 2 is removed from the pre-immersion solution 4 and immersed in a burnishing solution 8.
  • the burnishing solution 8 By immersing in the burnishing solution 8, the accumulated me- tall alloying elements 10 slowly and form a homogeneous alloyed bronzing layer 14 with the bronzing layer 12 arising in the bronzing solution 8.
  • This alloyed burnishing layer 14 can achieve that the properties of a burnishing layer with regard to wear resistance and degree of wear can be improved.

Abstract

L'invention concerne un élément métallique (2) renfermant du fer pourvu d'une couche de brunissage alliée (14) appliquée sur l'élément métallique (2) par brunissage.
PCT/EP2020/086276 2020-01-08 2020-12-15 Élément métallique renfermant du fer pourvu d'une couche de brunissage alliée WO2021139973A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020200146.4A DE102020200146A1 (de) 2020-01-08 2020-01-08 Eisenhaltiges Metallbauteil mit einer legierten Brünierschicht
DE102020200146.4 2020-01-08

Publications (1)

Publication Number Publication Date
WO2021139973A1 true WO2021139973A1 (fr) 2021-07-15

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PCT/EP2020/086276 WO2021139973A1 (fr) 2020-01-08 2020-12-15 Élément métallique renfermant du fer pourvu d'une couche de brunissage alliée

Country Status (2)

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DE (1) DE102020200146A1 (fr)
WO (1) WO2021139973A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021206711A1 (de) 2021-06-29 2022-12-29 Aktiebolaget Skf Bauteil

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6309476B1 (en) * 1999-05-24 2001-10-30 Birchwood Laboratories, Inc. Composition and method for metal coloring process
DE102007048750A1 (de) * 2007-10-11 2009-04-16 Schaeffler Kg Verfahren zur Herstellung eines metallischen Bauteils, insbesondere eines Lagerbauteils oder Präzisionsbauteils, sowie verfahrensgemäß hergestelltes Bauteil
JP2010215936A (ja) * 2009-03-13 2010-09-30 Demlite Co Ltd 鉄鋼の黒化処理液、黒化処理方法及び鉄鋼材
DE102016210507A1 (de) * 2016-06-14 2017-12-14 Schaeffler Technologies AG & Co. KG Verfahren zur Herstellung einer Gleitfläche an einem Maschinenelement sowie Maschinenelement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6309476B1 (en) * 1999-05-24 2001-10-30 Birchwood Laboratories, Inc. Composition and method for metal coloring process
DE102007048750A1 (de) * 2007-10-11 2009-04-16 Schaeffler Kg Verfahren zur Herstellung eines metallischen Bauteils, insbesondere eines Lagerbauteils oder Präzisionsbauteils, sowie verfahrensgemäß hergestelltes Bauteil
JP2010215936A (ja) * 2009-03-13 2010-09-30 Demlite Co Ltd 鉄鋼の黒化処理液、黒化処理方法及び鉄鋼材
DE102016210507A1 (de) * 2016-06-14 2017-12-14 Schaeffler Technologies AG & Co. KG Verfahren zur Herstellung einer Gleitfläche an einem Maschinenelement sowie Maschinenelement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021206711A1 (de) 2021-06-29 2022-12-29 Aktiebolaget Skf Bauteil
EP4112774A1 (fr) * 2021-06-29 2023-01-04 Aktiebolaget SKF Pièce avec couche de brunissage

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