DE3604440A1 - Furnace for producing Fe2B layers on workpieces of iron-based alloys (ferrous alloys) - Google Patents

Furnace for producing Fe2B layers on workpieces of iron-based alloys (ferrous alloys)

Info

Publication number
DE3604440A1
DE3604440A1 DE19863604440 DE3604440A DE3604440A1 DE 3604440 A1 DE3604440 A1 DE 3604440A1 DE 19863604440 DE19863604440 DE 19863604440 DE 3604440 A DE3604440 A DE 3604440A DE 3604440 A1 DE3604440 A1 DE 3604440A1
Authority
DE
Germany
Prior art keywords
furnace
boron
layers
iron
fe2b
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.)
Withdrawn
Application number
DE19863604440
Other languages
German (de)
Inventor
Lorenz Dr Singheiser
Fritz Dipl Ing Hegewaldt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BBC Brown Boveri AG Germany
Original Assignee
Brown Boveri und Cie AG Germany
BBC Brown Boveri AG Germany
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 Brown Boveri und Cie AG Germany, BBC Brown Boveri AG Germany filed Critical Brown Boveri und Cie AG Germany
Priority to DE19863604440 priority Critical patent/DE3604440A1/en
Publication of DE3604440A1 publication Critical patent/DE3604440A1/en
Withdrawn legal-status Critical Current

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
    • C23C8/08—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 only one element being applied
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
    • 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
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/0003—Linings or walls
    • F27D1/0006—Linings or walls formed from bricks or layers with a particular composition or specific characteristics
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00482—Coating or impregnation materials
    • C04B2111/00525—Coating or impregnation materials for metallic surfaces
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3418—Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38—Non-oxide ceramic constituents or additives
    • C04B2235/3817—Carbides
    • C04B2235/3826—Silicon carbides
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38—Non-oxide ceramic constituents or additives
    • C04B2235/3852—Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
    • C04B2235/3873—Silicon nitrides, e.g. silicon carbonitride, silicon oxynitride

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

Furnace for boriding, i.e. of Fe2B layers on workpieces of iron-based alloys in the heated interior space of the furnace, in which boron-containing gas BCl3 (boron trichloride) is fed in in a mixture, which may be selected, of N2 and/or H2 gases at atmospheric pressure and in which the metallic surfaces enclosing the interior space are coated or clad with ceramics, for example silicon compounds such as SiC, SiO2 or Si3N4, which are inert to the boron halides.

Description

Die Erfindung bezieht sich auf einen Ofen mit beheiztem Innenraum zum Erzeugen von Fe2B-Schichten auf Werk­ stücken aus Eisenbasislegierungen in dem Ofeninnenraum, dem borhaltiges Gas BCl3 (Bortrichlorid) in einem wähl­ baren Gemisch aus N2- und/oder H2-Gasen unter Atmosphä­ rendruck zugeführt wird und bei dem die den Innenraum umschließenden metallischen Flächen mit einer die Auf­ nahme von Bor verhindernden Schutzschicht versehen sind.The invention relates to a furnace with a heated interior for producing Fe 2 B layers on work pieces made of iron-based alloys in the interior of the furnace, the boron-containing gas BCl 3 (boron trichloride) in a selectable mixture of N 2 - and / or H 2 - Gases is supplied under atmospheric pressure and in which the metallic surfaces surrounding the interior are provided with a protective layer preventing boron.

Ein Verfahren und ein Ofen zum Erzeugen von Fe2-B-Ver­ schleißschutzschichten ausgehend von gasförmigen BCL3- H2-N2-Gasgemischen zur Borabscheidung ist aus der DE-OS 31 39 462 bekanntgeworden. Die vorgesehene Schutzschicht verhindert eine Boridbildung und eine vorzeitige Zerstö­ rung der metallischen Ofenwände durch HCl.A method and a furnace for producing Fe 2 -B wear protection layers based on gaseous BCL 3 - H 2 -N 2 gas mixtures for boron separation has become known from DE-OS 31 39 462. The provided protective layer prevents boride formation and premature destruction of the metal furnace walls by HCl.

Aufgabe der Erfindung ist es, die erreichte Lebensdauer der Schutzschicht und damit der metallischen Flächen zu erhöhen.The object of the invention is the lifetime achieved the protective layer and thus the metallic surfaces increase.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß die metallischen Teile im Ofenraum mit gegen Borha­ logenide inerter Keramiken beschichtet bzw. ausgekleidet sind. Nach einem weiteren Merkmal der Erfindung sind besonders Siliziumverbindungen wie SiC, SiO2 und Si3N4 besonders geeignet.This object is achieved according to the invention in that the metallic parts in the furnace chamber are coated or lined with ceramics which are inert to Borha. According to a further feature of the invention, silicon compounds such as SiC, SiO 2 and Si 3 N 4 are particularly suitable.

Die warmfesten metallischen Flächen, die den Ofeninnen­ raum umschließen und somit einer Art Retorte bilden, werden mit den gegen Borhalogenide inerten Keramiken be­ schichtet bzw. ausgekleidet. Diese Stoffe können auch dazu benutzt werden, die metallischen Teile von Tragge­ stellen oder dergleichen, die zur Aufnahme der Werkstüc­ ke im Ofen vorgesehen sind, zu beschichten und somit gegen Ablagerungen von Bor oder dergleichen zu schützen.The heat-resistant metallic surfaces that the interior of the oven enclose space and thus form a kind of retort, are made with the ceramics inert to boron halides stratified or lined. These substances can too to be used, the metallic parts of Tragge make or the like, for receiving the workpiece ke are provided in the oven to coat and thus to protect against deposits of boron or the like.

Claims (2)

1. Ofen mit beheiztem Innenraum zum Erzeugen von Fe₂B-Schichten auf Werkstücken aus Eisenbasislegierungen in dem Ofeninnenraum, dem borhaltiges Gas BCl3 in einem wählbaren Gemisch aus N2- und/oder H2-Gasen unter Atmo­ sphärendruck zugeführt wird und bei dem die den Ofenin­ nenraum umschließenden metallischen Flächen mit einer die Aufnahme von Bor verhindernde Schutzschicht versehen sind, dadurch gekennzeichnet, daß die metallischen Teile im Ofenraum mit gegen Borhalogenide inerten Keramiken beschichtet bzw. ausgekleidet sind.1. Furnace with a heated interior for generating Fe₂B layers on workpieces made of iron-based alloys in the interior of the furnace, the boron-containing gas BCl 3 in a selectable mixture of N 2 - and / or H 2 gases is supplied under atmospheric pressure and in which the Metallic surfaces surrounding the furnace interior are provided with a protective layer preventing the absorption of boron, characterized in that the metallic parts in the furnace space are coated or lined with ceramics which are inert to boron halides. 2. Ofen nach Anspruch 1, dadurch gekennzeichnet, daß Siliziumverbindungen wie SiC, SiO2 und Si3N4 zur Beschichtung bzw. Auskleidung der metallischen Flächen im Ofeninnenraum verwendet werden.2. Furnace according to claim 1, characterized in that silicon compounds such as SiC, SiO 2 and Si 3 N 4 are used for coating or lining the metallic surfaces in the interior of the furnace.
DE19863604440 1986-02-13 1986-02-13 Furnace for producing Fe2B layers on workpieces of iron-based alloys (ferrous alloys) Withdrawn DE3604440A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19863604440 DE3604440A1 (en) 1986-02-13 1986-02-13 Furnace for producing Fe2B layers on workpieces of iron-based alloys (ferrous alloys)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19863604440 DE3604440A1 (en) 1986-02-13 1986-02-13 Furnace for producing Fe2B layers on workpieces of iron-based alloys (ferrous alloys)

Publications (1)

Publication Number Publication Date
DE3604440A1 true DE3604440A1 (en) 1987-08-20

Family

ID=6293965

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19863604440 Withdrawn DE3604440A1 (en) 1986-02-13 1986-02-13 Furnace for producing Fe2B layers on workpieces of iron-based alloys (ferrous alloys)

Country Status (1)

Country Link
DE (1) DE3604440A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0383103A1 (en) * 1989-02-17 1990-08-22 Vereinigte Schmiedewerke Gmbh Process for the production of a high-strength and tough metal composite material
DE19845463A1 (en) * 1998-10-02 2000-04-06 Stiftung Inst Fuer Werkstoffte Wear resistant boride layers are produced, e.g. on steel or titanium alloy substrates, by gas boriding using volatile boron compounds containing boron-oxygen and/or boron-nitrogen bonds

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0383103A1 (en) * 1989-02-17 1990-08-22 Vereinigte Schmiedewerke Gmbh Process for the production of a high-strength and tough metal composite material
DE19845463A1 (en) * 1998-10-02 2000-04-06 Stiftung Inst Fuer Werkstoffte Wear resistant boride layers are produced, e.g. on steel or titanium alloy substrates, by gas boriding using volatile boron compounds containing boron-oxygen and/or boron-nitrogen bonds

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Legal Events

Date Code Title Description
8127 New person/name/address of the applicant

Owner name: BBC BROWN BOVERI AG, 6800 MANNHEIM, DE

8127 New person/name/address of the applicant

Owner name: ASEA BROWN BOVERI AG, 6800 MANNHEIM, DE

8139 Disposal/non-payment of the annual fee