US3784403A - Process for cladding steel - Google Patents

Process for cladding steel Download PDF

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Publication number
US3784403A
US3784403A US00284639A US3784403DA US3784403A US 3784403 A US3784403 A US 3784403A US 00284639 A US00284639 A US 00284639A US 3784403D A US3784403D A US 3784403DA US 3784403 A US3784403 A US 3784403A
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Prior art keywords
shape
hydrogen
tantalum
cladding
chlorine
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Expired - Lifetime
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US00284639A
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English (en)
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F Glaski
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Fansteel Inc
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Fansteel Inc
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Assigned to FANSTEEL INC., A CORP. OF DELAWARE reassignment FANSTEEL INC., A CORP. OF DELAWARE MERGER (SEE DOCUMENT FOR DETAILS). AND CHANGE OF NAME EFFECTIVE MAY 13, 1985 (DELAWARE) Assignors: FANSTEEL DELAWARE INCORPORATED, A CORP. OF DE, FANSTEEL INC., A CORP. OF NY
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    • 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
    • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/06—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of metallic material
    • C23C16/08—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of metallic material from metal halides
    • C23C16/14—Deposition of only one other metal element

Definitions

  • ABSTRACT A process for cladding of steels and the resulting product. A consistent and acceptable bond is obtained by providing a containment coating to prevent diffusion of the ingredients of the sub-strate into the cladding material.
  • a desirable containment coating is one in which one of the constituents is provided by the sub strate to provide a composite which is more stable than similar compounds of the cladding coat such as tantalum or columbium. This permits a chemical vapor deposition of the cladding without adverse reac tion with surface ingredients.
  • a further step in the process is available in the localizing of flow of gas in the deposition to bring them together just prior to contact with the shape to be coated.
  • This invention relates to a process for cladding steels with tantalum or columbium and to the resulting prod- UCI.
  • the present invention contemplates a coating on steel which will protect the surface against the deterioration when tantalum is deposited by chemical vapor deposition. It is, therefore, an object of the invention to provide a process for cladding steel with tantalum or possibly columbium which is consistentlysuccessful and uniform.
  • FIG. 1 A drawing accompanies the disclosure and a single FIGURE thereof may be described as a diagrammatic illustration of an apparatus for accomplishing the present invention.
  • an overcoat on a particular sub-strate is defined as the deposition of a measurable thickness of material on a surface. All electroplated coatings are overcoats; and, similarly, hydrogenreduced refractory metal halides in a chemical vapor deposition process results in an overcoat. In these depositions, all the components of the coating are provided by the plating bath or the plating gas and none are provided by the substrate.
  • the coating does not build up on the surface to any appreciable extent but rather grows into the: surfce.
  • titanium carbide is thermodynamically more. stable than TaC, the pure tantalum may be deposited without further carbon diffusion from the substrate.
  • the carbon is available primarily from metal carbides in the sub-strate which are less stable than TiC. Nearly all the metal carbides normally occurring in carbon steel and low alloy carbon steel are less stable than TaC and thus displacement diffusion coating is required.
  • titanium has been mentioned above, it is possible to use a containment coating of a metal selected from Groups Nb and Vlb, iron, and cobalt. Of this group, for example, titanium carbide and ZrC are both more stable than tantalum carbide. After this containment coating is applied, it is possible to overcoat with pure tantalum in a CVD process without further carbon diffusion from the sub-strate.
  • the pure metal overcoat is applied to the stainless steel, the nickel diffusion is blocked and the CVD coating or clad of tantallum can be readily applied using conventional procedures.
  • carbon steel can also be plated or plasma sprayed with pure metals as above described to block carbon diffusion.
  • steel castings for example, they are sometimes ground out and plasma coated with iron to remove the surface porosity and then titanized to stabilize any'carbon that may have diffused into the plasma coat. Then the tantalum clad may proceed with a resulting good quality and uniform coat.
  • Tantalum cladding has been much improved by a control of the mixing of the tantalum C1 and the hydrogen reactant gases.
  • a process of depositing a cladding coat on a carbon bearing steel shape which comprises:
  • a process of depositing a cladding coat on a carbon bearing steel shape which comprises:
  • a process of depositing a cladding coat on stainless steel shape which comprises:

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  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Vapour Deposition (AREA)
US00284639A 1972-08-29 1972-08-29 Process for cladding steel Expired - Lifetime US3784403A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US28463972A 1972-08-29 1972-08-29

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US3784403A true US3784403A (en) 1974-01-08

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US (1) US3784403A (it)
IT (1) IT985731B (it)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3890110A (en) * 1972-08-29 1975-06-17 Fansteel Inc Composite coated steel structure for corrosion resistance
US6605818B1 (en) * 2002-03-28 2003-08-12 The Boeing Company Method for protecting against ionizing radiation using a sprayed protective coating, and a protected structure
US6702177B2 (en) 2000-12-22 2004-03-09 Le Carbone Lorraine Manufacturing process for a plated product comprising a support part in steel and an anticorrosion metallic coating
US6800150B2 (en) 2002-04-29 2004-10-05 Le Carbone Lorraine Manufacturing process for an element of a chemical device comprising a support part in metal and an anticorrosion metallic coating

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3115957A (en) * 1959-02-18 1963-12-31 Eitel Mccullough Inc Art of sealing quartz to metal
US3248612A (en) * 1962-07-23 1966-04-26 Sprague Electric Co Capacitor electrode and method
US3355265A (en) * 1965-04-16 1967-11-28 United States Steel Corp Method of producing ductile coated steel and novel product
US3574661A (en) * 1966-09-27 1971-04-13 Texas Instruments Inc Dispersion strengthened metals and process for making same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3115957A (en) * 1959-02-18 1963-12-31 Eitel Mccullough Inc Art of sealing quartz to metal
US3248612A (en) * 1962-07-23 1966-04-26 Sprague Electric Co Capacitor electrode and method
US3355265A (en) * 1965-04-16 1967-11-28 United States Steel Corp Method of producing ductile coated steel and novel product
US3574661A (en) * 1966-09-27 1971-04-13 Texas Instruments Inc Dispersion strengthened metals and process for making same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3890110A (en) * 1972-08-29 1975-06-17 Fansteel Inc Composite coated steel structure for corrosion resistance
US6702177B2 (en) 2000-12-22 2004-03-09 Le Carbone Lorraine Manufacturing process for a plated product comprising a support part in steel and an anticorrosion metallic coating
US20040065392A1 (en) * 2000-12-22 2004-04-08 Le Carbone Lorraine Manufacturing process for a plated product comprising a support part in steel and an anticorrosion metallic coating
US6605818B1 (en) * 2002-03-28 2003-08-12 The Boeing Company Method for protecting against ionizing radiation using a sprayed protective coating, and a protected structure
US6800150B2 (en) 2002-04-29 2004-10-05 Le Carbone Lorraine Manufacturing process for an element of a chemical device comprising a support part in metal and an anticorrosion metallic coating

Also Published As

Publication number Publication date
IT985731B (it) 1974-12-20

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Owner name: FANSTEEL INC., A CORP. OF DELAWARE

Free format text: MERGER;ASSIGNORS:FANSTEEL INC., A CORP. OF NY;FANSTEEL DELAWARE INCORPORATED, A CORP. OF DE;REEL/FRAME:005172/0598

Effective date: 19850502