EP3631039A1 - Method for producing a component with at least one wear-reduced surface section, and component - Google Patents
Method for producing a component with at least one wear-reduced surface section, and componentInfo
- Publication number
- EP3631039A1 EP3631039A1 EP18727266.1A EP18727266A EP3631039A1 EP 3631039 A1 EP3631039 A1 EP 3631039A1 EP 18727266 A EP18727266 A EP 18727266A EP 3631039 A1 EP3631039 A1 EP 3631039A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- component
- layer
- wear
- contact layer
- nitrocarburizing
- 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.)
- Pending
Links
Classifications
-
- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/28—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in one step
- C23C8/30—Carbo-nitriding
- C23C8/32—Carbo-nitriding of ferrous surfaces
-
- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
-
- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/40—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions
- C23C8/52—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions more than one element being applied in one step
- C23C8/54—Carbo-nitriding
- C23C8/56—Carbo-nitriding of ferrous surfaces
-
- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/80—After-treatment
Definitions
- the present invention relates to a method for the production of a component, in particular one in tribological contact with another hereby corresponding component with at least one wear-reduced
- the invention relates to a manufactured according to this manufacturing method component with special properties.
- the field of application of the invention extends primarily to the production of components which are to be provided with each other in frictional contact with a wear and / or corrosion protection.
- armature and / or guide sleeves of electromagnetic linear actuators of magnetic pumps in DNOX systems for reducing nitrogen oxides in the exhaust gas have such wear-reduced surface sections.
- DE 10 2007 0367 12 Al discloses a generic method for producing a component with a wear-reduced surface section.
- the component is in the form of a side plate for a Sp Dreckbandmechanik comprising a body with a guide groove, wherein a
- Edge region of the spreader engages.
- the region of the guide groove is provided at least in sections with a wear-reduced surface section relative to the edge of the spreader belt. While the spreader strip including edge region consists of a hardened steel, the
- the wear-reduced surface portion from the side window as hereby Corresponding component with a coating of a metal matrix with PTFE particles (Teflon) provided.
- the metal matrix is preferably a nickel-phosphorus matrix in which the PTFE particles with a diameter of approximately 1 ⁇ m and a proportion of approximately 25% are incorporated.
- a PTFE coating to improve the tribological properties of a component after the mechanical processing of the component, which is usually designed as a steel component, takes place in the uncured state. Subsequently, the surface of the component is treated by blasting to increase the roughness, in order to increase the adhesive properties of the subsequent coating.
- a galvanic layer is applied, on which the PTFE coating is applied.
- the invention includes the procedural teaching that the component after shaping in the region of the surface portion, which
- nitrocarburizing is a known thermochemical method for enriching the surface layer of the component with nitrogen and carbon. This results in a nitriding layer, consisting of bonding and diffusion layer. In contrast, in simple nitriding, only nitrogen would be incorporated into the component surface.
- Nitrocarburizing of the surface portion is preferably carried out in the form of gas nitrocarburizing at a process temperature between 400 ° and 600 ° C., preferably between 450 ° to 600 ° C.
- plasma nitriding and salt bath nitriding could also take place.
- particularly high adhesive properties of the bonding layer can be achieved in the preferred temperature range.
- Gas nitrocarburizing can be combined with post oxidation.
- Gas nitrocarburizing preferably takes place at the indicated process temperature in a gas mixture which contains nitrogen and carbon donating components, preferably ammonia and carbon dioxide.
- nitrogen and carbon donating components preferably ammonia and carbon dioxide.
- the aim is to improve the wear resistance and corrosion resistance of low to medium sized sites.
- the component should be subjected to a cooling step to about 300 ° to 400 ° C, after which only the application of the PTFE coating as a contact layer for wear reduction takes place.
- This cooling step can be achieved more efficiently by immersing or spraying the component with a liquid PTFE dispersion, so that the necessary cooling to the aforementioned temperature range is combined with the application of the contact layer in the sense of functional integration.
- the contact layer to be applied to the compound layer may contain not only PTFE but also at least one filler.
- a filler for example, MoS2 or ZnO is suitable.
- the coating temperature or the component temperature must be reduced to below 100 ° C. before wetting, for example, and then heated again for crosslinking.
- the component is preferably fully machined prior to the wear-reducing coating to produce the final component mold.
- the material used is in particular a free-cutting steel, preferably HSMn30.
- the shaping can be done so far by machining, for example, turning, drilling or milling.
- Component pairing tolerance is used with respect to a further component in tribological contact herewith.
- it is proposed to carry out the bonding layer with a layer thickness in the range between 5 to 15 ⁇ m.
- the component an anchor or a sleeve of a electromagnetic Hubantriebs, so can be set hereby the residual air gap of this component pairing, to prevent a so-called magnetic sticking.
- FIG. 1 shows a flow chart representation of method steps for producing a component with a wear-reduced surface section
- FIG. 2 shows a schematic representation of a metallographic cut of a component coated according to the method according to FIG. 1,
- FIG. 3 shows a temperature-time diagram of a method sequence in the form of separate batch processes according to a first example
- Figure 4 is a temperature-time diagram of a process flow in the form of a combined, continuous process according to a second example.
- the component 1 forms an armature of an electromagnetic linear actuator (not shown here) which is to be provided with a wear-reduced surface section 2 along the entire lateral surface.
- an electromagnetic linear actuator (not shown here)
- a wear-reduced surface section 2 along the entire lateral surface.
- a free-cutting steel of the grade llSMn30 steel is selected in a first step. Starting from this, the steel material is machined in a subsequent step a by turning and milling to obtain the desired approximately cylindrical shape. This machining takes place in a soft, ie uncured, material state.
- a contact layer 4 to the compound layer 3 by spraying the component 1 with a PTFE dispersion, which also contains fillers in addition to PTFE. Subsequently, in the course of the further cooling, a mechanical crosslinking of the contact layer 4 to produce a reliable surface adhesion on the
- the connecting layer 3 is due to the porosity here not alone as a primer for the
- FIG. 3 shows a sequence of the method according to the invention in the course of separate batch processes, wherein step b of nitrocarburizing is carried out in an evacuated chamber furnace and the subsequent step of applying the PTFE contact layer by spraying the component outside the chamber furnace.
- the mechanically finished component is first during a
- Period I heated to a temperature of about 450 ° to 600 ° C, here a pre-oxidation takes place. During the period II, the
- Period IV to about 200 ° C by spraying that component surface, which was previously provided as a result of gas nitrocarburizing with a bonding layer.
- the mechanical crosslinking of the contact layer is carried out on the bonding layer at a temperature of about 350 ° C, to which the component is heated again accordingly.
- a repeated warming and cooling of the component takes place for carrying out the method according to the invention.
- a stepwise heating of the component of a temperature of at least 450 ° C is performed. This is a pre-oxidation.
- the component is controlled by means of liquid nitrogen cooled to about 300 ° to 400 ° C before further quenching takes place by immersing the component in a liquid PTFE dispersion to form the contact layer.
- Component heat can be carried out a mechanical crosslinking of the contact layer on the previously applied by the gas nitrocarburizing compound layer, which also takes place during the period IV.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017208915.6A DE102017208915A1 (en) | 2017-05-26 | 2017-05-26 | Method for producing a component with at least one wear-reduced surface section and component itself |
PCT/EP2018/063644 WO2018215591A1 (en) | 2017-05-26 | 2018-05-24 | Method for producing a component with at least one wear-reduced surface section, and component |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3631039A1 true EP3631039A1 (en) | 2020-04-08 |
Family
ID=62245303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18727266.1A Pending EP3631039A1 (en) | 2017-05-26 | 2018-05-24 | Method for producing a component with at least one wear-reduced surface section, and component |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3631039A1 (en) |
DE (1) | DE102017208915A1 (en) |
WO (1) | WO2018215591A1 (en) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007036712A1 (en) | 2007-08-03 | 2009-02-05 | Schaeffler Kg | Side plate for spread band mechanism has wear-reducing surface in relation to edge of spreading band at least in region near guide groove |
DE102007059855A1 (en) * | 2007-12-12 | 2009-06-25 | Robert Bosch Gmbh | Fuel metering unit for a high-pressure fuel pump and high-pressure fuel pump |
US20110151238A1 (en) * | 2009-12-17 | 2011-06-23 | Gm Global Technology Operations, Inc. | Low-friction coating system and method |
US20140311756A1 (en) * | 2013-04-22 | 2014-10-23 | Rock Dicke Incorporated | Pipe Centralizer Having Low-Friction Coating |
DE202015100601U1 (en) * | 2015-02-09 | 2015-03-06 | Kendrion (Villingen) Gmbh | Seat valve for at least partially closing and opening a conduit system |
-
2017
- 2017-05-26 DE DE102017208915.6A patent/DE102017208915A1/en active Pending
-
2018
- 2018-05-24 WO PCT/EP2018/063644 patent/WO2018215591A1/en active Application Filing
- 2018-05-24 EP EP18727266.1A patent/EP3631039A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2018215591A1 (en) | 2018-11-29 |
DE102017208915A1 (en) | 2018-11-29 |
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