WO2015058932A1 - Procédé de production d'une pièce recouverte de bore ou de chrome localement - Google Patents

Procédé de production d'une pièce recouverte de bore ou de chrome localement Download PDF

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Publication number
WO2015058932A1
WO2015058932A1 PCT/EP2014/070881 EP2014070881W WO2015058932A1 WO 2015058932 A1 WO2015058932 A1 WO 2015058932A1 EP 2014070881 W EP2014070881 W EP 2014070881W WO 2015058932 A1 WO2015058932 A1 WO 2015058932A1
Authority
WO
WIPO (PCT)
Prior art keywords
component
temperature
powder
locally
chromium
Prior art date
Application number
PCT/EP2014/070881
Other languages
German (de)
English (en)
Inventor
Karl-Otto Englert
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to EP14777331.1A priority Critical patent/EP3060692B1/fr
Publication of WO2015058932A1 publication Critical patent/WO2015058932A1/fr

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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/60—After-treatment
    • 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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/02—Pretreatment of the material to be coated
    • 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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • C23C10/30—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes using a layer of powder or paste on the surface
    • C23C10/32—Chromising
    • 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
    • C23C8/02—Pretreatment of the material to be coated
    • 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
    • C23C8/60—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 solids, e.g. powders, pastes
    • C23C8/62—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 solids, e.g. powders, pastes only one element being applied
    • C23C8/68—Boronising
    • C23C8/70—Boronising 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 invention relates to a method for producing a component from a low-alloyed steel material which is subjected to pressure and wear at least in a locally limited area.
  • the components are made of an alloyed material.
  • the necessary geometric precision of these components is achieved by a machining hard machining, such as by grinding. If the set by the heat treatment material to stand against wear is not sufficient, the other
  • nitriding, carbon and electroplated layers are suitable for this purpose. These layers are usually applied after a microstructural heat treatment.
  • High-pressure resistance increases the toughness of the components during further heat treatment. However, at the same time the hardness is reduced.
  • the layer thickness produced is usually less than 25 ⁇ " ⁇ limited diffusion of the coating atoms into the base material.
  • these thin layers do not provide sufficient protection under local load, such as particle impact.
  • a soft basic structure there are dents in the base material.
  • the geometric precision must be prepared before the coating, since the
  • the component has areas with a relatively high hardness, wear and corrosion resistance as well as areas with a relatively high toughness and ductility.
  • the method comprises the following method steps.
  • a machining of the component takes place in a non-heat-treated state.
  • step b) the component is provided with a
  • the cooling of the component to room temperature and the removal of the powder from the surface of the body follows. Due to the powder properties and the coating process, the removal of the powder is particularly easy because it can be blown off, for example, with compressed air.
  • a renewed heat treatment of the body takes place for the adjustment of either a martensitic or a bainitic structure at a second temperature, which is lower than the first temperature.
  • the second temperature is lower than the first temperature, the generated boundary layer is not changed but only the basic structure.
  • a bainitic structure is set, since this compared to the martensitic structure a higher toughness and in the
  • a conversion treatment of the martensitic microstructure of at least one hour at a temperature of over 200 ° C is carried out.
  • the conversion treatment leads to a considerable increase in toughness.
  • a fine machining of the component for the final shaping takes place.
  • the grinding is suitable because the removal of very hard material is relatively low.
  • the first temperature is at least 850 ° C up to the highest 950 ° C. This temperature causes the boron atoms or the chromium atoms to diffuse into the surface layer of the body.
  • the second temperature is at least 840 ° C up to at most 870 ° C. The temperature difference between the first and the second temperature causes the heat treatment has no influence on the borated or chromed edge layer of the component.
  • a holding body for an injection system of an internal combustion engine in a first method step, a holding body for an injection system of an internal combustion engine
  • valve bodies In the valve bodies, it is in particular the valve seats and in the
  • valve body or the holding body are essentially exposed only to a compressive load, so that it is particularly advantageous here if stresses can be reduced by plastic deformation.
  • areas with a ductile and tough structure are suitable for this purpose.
  • an iron boride or iron chromium layer with a layer thickness of at least 30 ⁇ m up to at most 2 ⁇ m is preferably produced at the surface layer of the component. This, compared to the layer thickness of high-alloy steels, significantly thicker layer is due to a low content of alloying elements of the low alloyed
  • the boron atoms when entering the surface layer of the body, essentially form Fe 2 B iron boride with a hardness of 1500 to 2000HV.
  • 10006 is used as low-alloyed steel material.
  • Figure 1 is a simplified schematic sectional view of a
  • FIG. 2 shows a method produced according to the method according to FIG. 1
  • the method according to the invention begins with a first method step a, a machining of a valve body 1 made of the material 10006 in a non-heat-treated state.
  • the valve body 1 is covered locally with a powder 2 having essentially boron.
  • the local coverage with powder is limited to the valve seat. 3
  • a heat treatment of the locally covered with the powder 2 valve body 1 at a first temperature of 910 ° C is made. This results in the locally limited diffusion of boron atoms from the powder 2 having boron into the surface layer of the valve body 1, in particular into the surface layer of the surface of the valve seat 3 to be bored. This results in an iron boride layer 5 having a layer thickness of up to ⁇ ⁇ at the surface layer the valve seat 3 generated.
  • valve body 1 is cooled to room temperature and the powder is removed.
  • valve body 1 is heat treated again to adjust a bainitic structure 4.
  • a second temperature is 840 ° C and is thus lower than that required for boriding
  • a six hour conversion treatment is carried out at a temperature of 220 ° C to 260 ° C. This increases the toughness of the bainitic structure 4 to a greater degree than the hardness is lowered.
  • a fine machining is performed by grinding the valve body 1 for final shaping.
  • the valve body 1 produced by the process according to the invention has a tempered and thus tough bainitic basic structure 4.
  • the valve seat 3 of the valve body 1 is borated and has a
  • Iron boride layer 5 with a layer thickness of up to ⁇ ⁇ on.
  • the valve body 1 has a first region, in the valve seat 3, with a high hardness, resistance to wear and corrosion as well as a second region with a relatively high toughness and ductility on the other hand.
  • valve body 1 In particular, it is also possible, instead of a valve body 1, other components, in particular for an injection system of a
  • Iron chromium layer generated.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

L'invention concerne un procédé de production d'une pièce (1) en un matériau à base d'acier faiblement allié, qui est soumise au moins dans une zone limitée localement, à une pression et une usure. Ledit procédé comprend les étapes suivantes : a) l'usinage par enlèvement de copeaux de la pièce (1) dans un état non traité à chaud ; b) le revêtement local de la pièce (1) avec une poudre présentant soit du bore, soit du chrome (2) ; c) le traitement thermique de la pièce (1) revêtue localement avec la poudre (2) pour la diffusion localement limitée soit d'atomes de bore de la poudre présentant du bore, soit d'atomes de chrome de la poudre présentant du chrome (2) dans la couche superficielle de la pièce (1) à une première température qui est supérieure à la température d'austénitisation du matériau à base d'acier faiblement allié ; d) le refroidissement de la pièce (1) à température ambiante et l'élimination de la poudre (2) ; et e) le nouveau traitement thermique de la pièce (1) pour la configuration d'une structure martensitique ou bainitique (4) à une deuxième température qui est inférieure à la première température.
PCT/EP2014/070881 2013-10-22 2014-09-30 Procédé de production d'une pièce recouverte de bore ou de chrome localement WO2015058932A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14777331.1A EP3060692B1 (fr) 2013-10-22 2014-09-30 Procédé de production d'une pièce recouverte de bore ou de chrome localement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013221403.0 2013-10-22
DE201310221403 DE102013221403A1 (de) 2013-10-22 2013-10-22 Verfahren zur Herstellung eines lokal borierten oder chromierten Bauteils

Publications (1)

Publication Number Publication Date
WO2015058932A1 true WO2015058932A1 (fr) 2015-04-30

Family

ID=51628138

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/070881 WO2015058932A1 (fr) 2013-10-22 2014-09-30 Procédé de production d'une pièce recouverte de bore ou de chrome localement

Country Status (3)

Country Link
EP (1) EP3060692B1 (fr)
DE (1) DE102013221403A1 (fr)
WO (1) WO2015058932A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107448254A (zh) * 2017-06-20 2017-12-08 扬州光辉汽车零部件有限公司 一种渗硼耐磨涂层气门

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3922038A (en) * 1973-08-10 1975-11-25 Hughes Tool Co Wear resistant boronized surfaces and boronizing methods
US4249961A (en) * 1976-03-06 1981-02-10 Harri Nevalainen High strength steel for diffusion chromizing
US4469532A (en) * 1981-10-06 1984-09-04 Nicolas Guy R Chromium-base coating for wear-resistant steel and method of preparing same
EP0438268A1 (fr) * 1990-01-18 1991-07-24 Taiho Kogyo Co., Ltd. Matériau glissant boruré à haute résistance mécanique et procédé pour sa fabrication

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3922038A (en) * 1973-08-10 1975-11-25 Hughes Tool Co Wear resistant boronized surfaces and boronizing methods
US4249961A (en) * 1976-03-06 1981-02-10 Harri Nevalainen High strength steel for diffusion chromizing
US4469532A (en) * 1981-10-06 1984-09-04 Nicolas Guy R Chromium-base coating for wear-resistant steel and method of preparing same
EP0438268A1 (fr) * 1990-01-18 1991-07-24 Taiho Kogyo Co., Ltd. Matériau glissant boruré à haute résistance mécanique et procédé pour sa fabrication

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
FICHTL ET AL: "Boronizing and its practical applications", MATERIALS AND DESIGN, LONDON, GB, vol. 2, no. 6, 1 December 1981 (1981-12-01), pages 276 - 286, XP024153330, ISSN: 0261-3069, [retrieved on 19811201], DOI: 10.1016/0261-3069(81)90034-0 *

Also Published As

Publication number Publication date
EP3060692A1 (fr) 2016-08-31
DE102013221403A1 (de) 2015-04-23
EP3060692B1 (fr) 2018-11-14

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