WO2019219551A1 - Corps de freinage et procédé de fabrication associé - Google Patents

Corps de freinage et procédé de fabrication associé Download PDF

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Publication number
WO2019219551A1
WO2019219551A1 PCT/EP2019/062120 EP2019062120W WO2019219551A1 WO 2019219551 A1 WO2019219551 A1 WO 2019219551A1 EP 2019062120 W EP2019062120 W EP 2019062120W WO 2019219551 A1 WO2019219551 A1 WO 2019219551A1
Authority
WO
WIPO (PCT)
Prior art keywords
base
brake
coating
brake body
corrosion
Prior art date
Application number
PCT/EP2019/062120
Other languages
German (de)
English (en)
Inventor
Rainer Langlet
Original Assignee
Langlet GmbH
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 Langlet GmbH filed Critical Langlet GmbH
Publication of WO2019219551A1 publication Critical patent/WO2019219551A1/fr

Links

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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/12—Discs; Drums for disc brakes
    • F16D65/127—Discs; Drums for disc brakes characterised by properties of the disc surface; Discs lined with friction material
    • 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/131—Wire arc spraying
    • 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/134—Plasma spraying
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2200/00—Materials; Production methods therefor
    • F16D2200/0004—Materials; Production methods therefor metallic
    • F16D2200/0026—Non-ferro
    • F16D2200/003—Light metals, e.g. aluminium
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2250/00—Manufacturing; Assembly
    • F16D2250/0038—Surface treatment
    • F16D2250/0046—Coating

Definitions

  • the invention relates to a brake body for a brake, and in particular a brake body with a coated base body.
  • the invention further relates to methods for the produc- tion of a brake body with a coated body.
  • Brakes for brakes are often made of gray cast iron as a base material.
  • Gray cast iron is characterized by a high volumetric heat capacity and good thermal shock resistance at a low price.
  • Ceramic ceramic discs have a long life, but are less interesting because of their high price for the mass of production vehicles. As corrosion protection and temporary paint or powder coatings are used, but in particular on a friction surface of a brake body already at the first Bremsvor gears are abraded and thus do not constitute a permanent corrosion protection onstik.
  • hard metal alloys or composite materials made of ceramic or hard metal particles in a metallic matrix are used, which offer improved behavior against corrosion and wear.
  • thermal spraying such as flame or arc spraying, high-velocity flame spraying (HVOF), plasma spraying, cold gas spraying, wire plasma spraying, wire high-speed spraying, electric wire spraying and plasma wire spraying.
  • the present approach focuses in particular on these adjoining surfaces (referred to below as base surfaces) and the economic application of a corrosion, heat and / or wear-resistant coating, in particular by means of thermal spraying.
  • the requirements of these areas applied to the friction surfaces deviate from those of the friction surface and can therefore be coated with more economical or cost-favorable method than the friction surfaces themselves.
  • this method is characterized by the fact that the coating on the adjoining surfaces additional Lich to a possible coating of the friction surfaces themselves can be performed. The only prerequisite for this is that the respective areas, which should not be coated in the respective process step, are covered accordingly.
  • the focus is on the corrosion protection of the adjacent surfaces / areas of the friction surface, which do not fulfill a direct braking function, but are also directly affected by the subject of corrosion and the associated disadvantages.
  • the adhesion of the applied layer to the base material is increased by the roughening of the surfaces to be coated prior to the thermal spraying. This is done, for example, by blasting using a hard material granules, by ultrasonic or laser beam treatment, by electron beam treatment or by diffusion treatment of the sub stratober Assembly by Plasmaborieren, Plasmacarbur Schl or by plasma nitriding. Also, removal of graphite from the surface by chemical, thermochemical and / or electrochemical cleaning processes or by reactive plasma etching.
  • a primer layer is ver used, which is applied between the base material and the wear and corrosion coating and mostly consists of metal len or metal alloys.
  • the application of such an intermediate layer represents a rather complicated additional process step.
  • the adhesion of a thermally sprayed layer on the base material or a primer layer is based on the Prin zip the mechanical clamping of the impinging spray particles on the substrate.
  • a much stronger connection is possible by metallurgical bonding, wherein by using thermal energy, an atomic diffusion process takes place at the interface between substrate and coating.
  • the substrate / the base body can be preheated before the injection process, so that the diffusion process can take place di rectly when the spray particles hit.
  • preheating temperatures in the range of 120 ° C to 150 ° C are described.
  • the brake body according to the invention comprises a base body with a first surface designed as a friction surface and a second surface formed as a base surface. In contrast to the friction surface, the base surface does not have any frictional or braking function.
  • the base area comprises a region of the surface of the base body which is arranged partially or completely adjacent to the friction surface.
  • the main body may be made of a base material, such as cast iron, for example cast gray, or from other iron or steel alloys Herge.
  • the brake body has a base area coating applied to the base area.
  • the brake body according to the invention can be used for all brakes that are subject to corrosion.
  • brakes in vehicles these include, for example, brakes in crane systems, wind turbines or elevators.
  • the base coat can be applied to the base by means of thermal spraying or by means of a coating method known from the prior art (eg powder coating, welding, laser welding, dipping method).
  • Thermal spraying is a process which can be carried out with little effort and at low cost.
  • the surface coating may be a predominantly heat, corrosion and / or wear-resistant coating.
  • the brake body according to the invention has a particularly good heat corrosion protection with a corresponding wear resistance. Besides, it is It is possible to coat hard-to-reach areas, such as cooling ducts.
  • the production of the brake body according to the invention comprises the following steps:
  • the application of the base coat can be done with a known from the prior art coating method or with the thermal spraying, preferably the arc or plasma wire spraying.
  • the thermal spraying preferably the arc or plasma wire spraying.
  • Plasma wire spraying is the spray material in wire form and is supplied via two approaches to the burner. These two wires are melted down either via an arc or a plasma and sprayed with a nebulizer gas (e.g., pressure
  • the surface can be heated immediately before coating in order to allow, to a certain extent, diffusion processes in the interface between the base material and the base coating material, for a material connection.
  • heat treatment is not required in most cases.
  • the resulting during braking heating of the brake body favors the diffusion of the coating in the base material, such as gray cast iron, and thus enhances the adhesion of the coating to the substrate during operation.
  • Aluminides Due to the heat generated during braking or the possible diffusion of the coating material into the base material of the base body, preferably gray cast iron, not only the adhesion of the coating is increased, but also the formation of aluminides, in particular iron alum, un supported. Aluminides have an even higher heat and corrosion resistance than the inventively provided base coating (the Grund vombe Anlagenungsmate rial) directly after the orders of the coating. This means that the adhesion as well as the wear, heat and corrosion protection of the coating improves during brake application.
  • the brake body can, after the coating of a heat be subjected to treatment.
  • This heat treatment can be initiated for example in an oven, by induction or laser technology.
  • a further advantageous aspect is that a present (caused by corrosion) "oxide skin” or “oxide coating” has an insulating effect and thus the heat dissipation is reduced compared to the pure base material.
  • the brake body according to the invention has a significantly reduced susceptibility to corrosion and can almost always retain the heat dissipation and / or the cooling behavior or do not deteriorate as previously mentioned. Maintaining the thermal conduction properties in addition to maintaining the cooling performance leads to an increase in the life of the body.
  • Plasma wire spraying leads to the production of a Grundflä chenbe slaughterung with a high adhesive strength and density corresponding to the requirements.
  • the application can be carried out by powder coating with means of another thermal spraying method, for example, high-speed spraying, flame or oxy-fuel spraying, plasma spraying, cold gas spraying or detonation.
  • the layer thickness of the base coat may range from about 30 ym to about 500 ym. Preferably, a range of 100 ym to 300 ym is generated. It particularly preferably follows the layer structure as a function of the spraying process up to a desired layer thickness by repeated deposition of several individual layers.
  • a material for the coating are basically all materials in question, which have a higher corrosion protection compared to the base material, which is in particular gray cast iron. Furthermore, a corresponding wear resistance, which is clearly superior to, for example, paints, must be taken into account.
  • the brake body according to the invention comprises a Grund lakebe coating which preferably comprises aluminum, seawater-resistant aluminum (hydronium) and / or an aluminum alloy. Further preferably, the base coat may comprise an aluminum such as an iron aluminide alloy, which is a very corrosion resistant material. As described above, this is particularly suitable as heat and corrosion protection for the intended application.
  • Another advantage of the invention is that entge gene known similar brake bodies no additional adhesion mediator layers (adhesive layers) beits Colour in an additional Ar and / or process must be applied.
  • the preparation of the base area to be coated with the usual methods in thermal spraying method, the blasting of the surfaces to be coated chen surface, done and there are no special measures neces sary.
  • This invention may also or additionally executed who the, when the friction surfaces of the body have a Reib lakebe coating.
  • the friction surface coating can go on with their, much more expensive or costly Ver drive and materials to be coated very wear-resistant, wear-resistant and / or corrosion-protective coatings. The prerequisite for this is that in the framework of the present invention not to be coated preparation che (friction surfaces) are covered accordingly, so as not to coat them.
  • a subsequent post-thermal spraying of the base surfaces mechanical post-processing of Grundhotel coating may be required taking into account the respective requirements.
  • a brake body for a vehicle manufactured or producible according to the method described can be a brake disk for a disk brake or a brake drum for a drum brake.
  • the base surface of the base body is not indirectly coated, but the base surface coating is first applied to a negative mold.
  • brake bodies are produced by means of a casting process.
  • Negativfor men which are encapsulated with the base material in the form of sand cores, matrices and / or molds required. All surfaces are called negative molds.
  • the coating of the negative mold is done with the previously described methods and materials.
  • a release agent will be applied to the negative mold.
  • the application of the base surface coating on the negative mold is carried out analogously to the method described above with the same or slightly larger layer thicknesses (up to 2 mm).
  • the Grund vomunbe coating for example, between separating layers are embedded with a higher melting point.
  • These separation layers can be made of a material similar to the base material of the base body and applied by the same method as the base area coating.
  • a separating layer applied between the negative mold and the base coat also acts as a release agent and makes the use of another release agent unnecessary.
  • a separating layer may alternatively or additionally be applied to the base coat applied to the negative mold.
  • Iron aluminide alloys have a higher melting point than aluminum, aluminum alloys and / or hydronalium (seawater resistant aluminum).
  • the ferrous aluminide alloy may be used directly as a material in powder or wire form, or may be applied, for example, in coating by the simultaneous use of an iron alloy and an aluminum alloy (as mentioned above).
  • the coating of the negative mold has the further advantage that hard to reach areas are easier or more precise and more uniformly coatable. By the (even) high Temperature during casting occurs without additional process steps for diffusion and the formation of iron aluminide.
  • the brake body described above which is produced according to a second advantageous embodiment, can be with the features that are described in the context of the first embodiment variant, be trained.
  • the invention also relates to a method for producing a brake body with the steps:
  • the base coat can be a heat, corrosion and / or wear resistant coating.
  • a brake body manufactured according to this method therefore has a particularly good heat corrosion protection with a corresponding wear resistance. It is also possible to coat hard to reach areas, such as cooling ducts.
  • the invention also relates to an alternative method for producing a brake body with the steps:
  • the release agent can also be applied in the form of a release layer on the Nega tivform.
  • the release layer is applied in combination with a base coat in a process step on the negative mold.
  • the inventive method can be further developed in conjunction with the features described in co with the brake body according to the invention.
  • Fig. 1 a schematic sectional view and an enlarged
  • Fig. 2 a schematic sectional view and an enlarged
  • Fig. 3 a schematic sectional view and an enlarged
  • Fig. 4 a schematic sectional view and an enlarged
  • Fig. 1 is a marginal section of a to be coated
  • Main body 12 of a brake body 10 is shown.
  • the brake body 10 is a brake disc with cooling channels for a disc brake of a motor vehicle.
  • the base body 12 has at its outer periphery a friction or braking surface 14 (hereinafter referred to as the friction surface 14 net designated).
  • the main body 12 is made in the present example of gray cast iron by means of a conventional casting process.
  • the base 15 which is in this embodiment, each surface 15 of the body 12, except the Reibflä chen 14.
  • the base 15 is made of gray cast iron or other corrosion-prone material and is provided with a kor rosionstheenden base coating 18.
  • the roughening is preferably carried out using a jet system, in which the base body 12 is inserted into a receptacle and the non-coated areas of the surface are covered and thus protected from the blasting material. Thereafter, the base body 12, possibly in rotation, or roughened to be coated surface with a defined jet material and pressure by means of the blasting process.
  • a jet system in which the base body 12 is inserted into a receptacle and the non-coated areas of the surface are covered and thus protected from the blasting material. Thereafter, the base body 12, possibly in rotation, or roughened to be coated surface with a defined jet material and pressure by means of the blasting process.
  • Fig. 2 the result of the common beam processing of the friction surface 14 and the base 15 is shown. In the event that the friction surface 14 is not to be blasted, this would have been covered and would, as shown in Fig. 1, untreated.
  • the result of the blasting treatment is a "mountain profile” or a “hill-and-valley profile” of the blasted base surface 15 and of the friction surface 14.
  • the roughness depth Rz is hereby traversed over the beam , which determines blasting material or material, the pressure and the feed.
  • the desired roughness is defined as a function of the desired layer thickness. Present jet particles can be removed by blowing off.
  • the base body 12 is shown with a Reib lakebe coating 16 on the friction surface 14. It does not matter with which method a coating 16 has been applied for the friction surfaces 14. Depending on the process, however, it should be taken into account that the base surface 15 is possibly covered, or the blasted substrate, in this case gray cast iron, is present without impurities.
  • FIG. 4 shows a brake body 10 according to the invention.
  • the application of the base area coating 18 to the base area 15 takes place by means of a thermal spraying process, in this case arc wire or plasma wire spraying.
  • a thermal spraying process for this purpose, for example, a material consisting of aluminum or aluminum alloys, such as hydronalium used.
  • the application of the base coat 18 can take place in several steps or layers until a desired layer thickness, preferably in the range from 50 ⁇ m to 300 ⁇ m, is achieved. It should be noted that the friction surfaces 14 and their possible friction surface coating 16 are covered from and not co-coated with the surface 15 provided for the fitting Grundflä surface coating 18.
  • a friction surface coating 16 of the friction surfaces 14 is carried out, also a final mechanical post-processing of the applied friction surface coating 16 can take place.
  • the base coating 18, at least in the accessible areas be treated with aftertreatment.
  • the combination of the roughening and the thermal spraying produces a base coat 18 with adhesion and density on the base body which is sufficiently good for the application.
  • this corrosion-protective layer is feasible with cost-effective means and compared to the standard, such as paints, much more stable.
  • the diffusion processes of the coating into the main body mentioned by the temperature initiated during braking were not described or illustrated here. In principle, such processes could be initiated by an additional heat treatment following the application of the coating.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

La présente invention concerne un corps de freinage (10) destiné à un frein, en particulier de véhicule, comprenant un corps de base (12) qui présente une première surface sous la forme d'une surface de friction (14), une deuxième surface sous la forme d'une surface de base (15) disposée adjacente à la surface de friction (14), ainsi qu'un revêtement (18) appliqué sur la surface de base (15). Le corps de freinage selon l'invention assure une protection anticorrosion au niveau de la surface de base (15) du corps de base (12). L'invention concerne en outre un procédé de fabrication d'un corps de freinage (10).
PCT/EP2019/062120 2018-05-15 2019-05-13 Corps de freinage et procédé de fabrication associé WO2019219551A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202018102704.2U DE202018102704U1 (de) 2018-05-15 2018-05-15 Bremskörper für ein Fahrzeug
DE202018102704.2 2018-05-15

Publications (1)

Publication Number Publication Date
WO2019219551A1 true WO2019219551A1 (fr) 2019-11-21

Family

ID=62510154

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/062120 WO2019219551A1 (fr) 2018-05-15 2019-05-13 Corps de freinage et procédé de fabrication associé

Country Status (2)

Country Link
DE (1) DE202018102704U1 (fr)
WO (1) WO2019219551A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3620545B1 (fr) 2018-09-04 2021-06-09 Ford Global Technologies, LLC Disque de frein et procédé de fabrication d'un disque de frein
DE102019209422A1 (de) * 2019-06-27 2020-12-31 Robert Bosch Gmbh Reibbremskörper für eine Radbremse eines Kraftfahrzeugs, Reibbremse und Verfahren zur Herstellung eines Reibbremskörpers
DE202019107269U1 (de) 2019-12-30 2020-01-23 C4 Laser Technology GmbH Verschleiß- und Korrosionsschutzschicht aufweisende Bremseinheit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007043961A1 (fr) * 2005-10-13 2007-04-19 Scania Cv Ab (Publ) Composant de véhicule revêtu résistant à l'usure et véhicule
US20130161136A1 (en) * 2011-12-27 2013-06-27 Robert Bosch Gmbh Process for coating a brake disk and brake disk produced by the process
DE102016200951A1 (de) * 2016-01-25 2017-07-27 Volkswagen Aktiengesellschaft Verfahren zum Erzeugen einer verschleiß- und/oder korrosionsfesten Beschichtung auf einer Reibfläche eines Bremskörpers sowie nach dem Verfahren herstellbarer Bremskörper
DE102016207876A1 (de) * 2016-05-09 2017-11-09 Robert Bosch Gmbh Bremsscheibe und Verfahren zu ihrer Herstellung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007043961A1 (fr) * 2005-10-13 2007-04-19 Scania Cv Ab (Publ) Composant de véhicule revêtu résistant à l'usure et véhicule
US20130161136A1 (en) * 2011-12-27 2013-06-27 Robert Bosch Gmbh Process for coating a brake disk and brake disk produced by the process
DE102016200951A1 (de) * 2016-01-25 2017-07-27 Volkswagen Aktiengesellschaft Verfahren zum Erzeugen einer verschleiß- und/oder korrosionsfesten Beschichtung auf einer Reibfläche eines Bremskörpers sowie nach dem Verfahren herstellbarer Bremskörper
DE102016207876A1 (de) * 2016-05-09 2017-11-09 Robert Bosch Gmbh Bremsscheibe und Verfahren zu ihrer Herstellung

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