EP0007721A1 - Méthode de traitement d'une plaque métallique - Google Patents

Méthode de traitement d'une plaque métallique Download PDF

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Publication number
EP0007721A1
EP0007721A1 EP79301300A EP79301300A EP0007721A1 EP 0007721 A1 EP0007721 A1 EP 0007721A1 EP 79301300 A EP79301300 A EP 79301300A EP 79301300 A EP79301300 A EP 79301300A EP 0007721 A1 EP0007721 A1 EP 0007721A1
Authority
EP
European Patent Office
Prior art keywords
particles
mix
firing
metal plate
green
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Withdrawn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
EP79301300A
Other languages
German (de)
English (en)
Inventor
William Wittels
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.)
CERTELS Ltd
Original Assignee
CERTELS Ltd
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 CERTELS Ltd filed Critical CERTELS Ltd
Publication of EP0007721A1 publication Critical patent/EP0007721A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/02—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a matt or rough surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • 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
    • C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B05D1/12—Applying particulate materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2202/00—Metallic substrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2252/00—Sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0218—Pretreatment, e.g. heating the substrate

Definitions

  • the present invention relates to surface treatment of metal plates with sharp, non-metallic particles.
  • the principal purpose of this treatment is to render the plates slip proof and thus permit kem to, be used as decking plates on ships and other locations.
  • other applications for such places, such as carriers for abrasives, are also foreseen.
  • the heating of the metal plate may be carried out in a variety of ways. Preferably however the heating is carried out co effect surface-melting of the plate in a single narrow transverse band which travels along the plate. Such a surface-melted band is most conveniently generated by moving the plate past a heating station at which it is subjected to intense local surface heating by means of, for example, an array of gas torches, welding electrodes such as are used in tungsten/inert gas welding or plasma torches.
  • the non-metallic particles are projected against the surface of the metal plate either within the narrow band subjected to heating to effect surface melting or in the zone immediately succeeding said band so that the particles strike the metal surface whilst still molten or in a heat-softened condition.
  • the particles should strike the metal surface with sufficient force to embed them firmly in the metal without at the same time submerging the particles to such extent that they project insufficiently from the subsequently solidified metal surface to achieve the result for which they are intended, over a prolonged service life. In general it may be said that satisfactory bonding of the particles into the metal surface will be achieved where rather more than half the volume of the individual particles lie within the metal, but this will vary both with the size of the particles and the shape of such particles.
  • the method of the invention will involve the use of coarse, sharp grit of a particle size in the range of 2 - 5 mm, although particles of smaller size down to 100 microns may be used, preferably in admixsure with the envisaged coarse grit, although in some circumstances, these small particles may be used by themselves.
  • the force required to project the pavticles at the metal plate to achieve adequate penetration of the metal surface could be generated either by centrifugal action or by means of gas blast.
  • the particles may be entrained in a high speed gas stream, which may be air or a stream or an inert gas.
  • the gas may be at room temperature or preheated to avoid excessive chilling of the metal when it strikes the plate. If the gas is preheated then it is preferably of low oxygen content to avoid excessive oxidation of the metal surface. It if estimated that a gas pressure of about 500 p.s.i. will provide a driving force sufficient to ensure adequate particle penetration with particles of the size range already mentioned.
  • the process of the invention is primarily envisaged as a means for the production of non-slip decking plates for ships as a decking for bridges and other land structures, both for vehicles and pedestrians.
  • One possible application is as a long- life non-slip covering for aircraft runways and taxi- tracks.
  • the process is primarily envisaged as a process for treatment of steel plates, it may also be applied to other metals, such as aluminium, which is extensively used in decking plates.
  • non-metallic particles be themselves chosen with care to ensure that they will remain sharp under the selected service conditions.
  • the particles should therefore be wear-resistant and resistant to becoming polished.
  • a man-made aggregate which presents a surface of relatively sharp, hard particles embedded in a somewhat softer matrix.
  • One such material is made by a method which broadly comprises the steps of forming a mix consisting essentially of particles of granite or other feldspathic rock and aluminium oxide particles in the size range of 10 - 500 ⁇ .
  • the aluminium oxide forming 2% to 30%, preferably 5% to 15%, of the mix and a clay, preferably kaolin, or other binder, compressing the mix to form coherent "green” blocks and firing the compressed "green” material for a time and temperature sufficient to form the mix into a matrix containing hard sharp alumina particles, the compressed material being comminuted into the form of irregularly shaped, angular chips before or after firing.
  • the chips are produced by crushing the "green” tiles or slabs and are then fired at a temperature and for a time sufficient to fuse the feldspar to form a matrix in which the alumina and other higher melting point components are embedded.
  • a firing temperature in the range of 1150 - 1300°C is generally satisfactory.
  • natural or synthetic materials such as zirconite, emery, corundum, anorthosite, crystalline fused alumina may be employed.
  • the sheet or plate 10 is forwarded at a steady rate while supported on rollers 11 past a surface-melting station at which a battery of gas burners 12 are positioned in a chamber bounded by a pair of spaced refractory walls 13, 14 extending across the width of the roller table and having bottom edges in close proximity to the surface of the plate.
  • a series of particle discharge nozzles 15 are arranged to discharge the grit onto the surface of the plate as it emerges from under the refractory wall.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Compositions Of Oxide Ceramics (AREA)
EP79301300A 1978-07-07 1979-07-05 Méthode de traitement d'une plaque métallique Withdrawn EP0007721A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2919478 1978-07-07
GB7829194 1978-07-07

Publications (1)

Publication Number Publication Date
EP0007721A1 true EP0007721A1 (fr) 1980-02-06

Family

ID=10498314

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79301300A Withdrawn EP0007721A1 (fr) 1978-07-07 1979-07-05 Méthode de traitement d'une plaque métallique

Country Status (2)

Country Link
EP (1) EP0007721A1 (fr)
JP (1) JPS5511197A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988003457A1 (fr) * 1986-11-05 1988-05-19 Werner Foppe Procede de fabrication de fraises par implantation de macrograins de materiaux abrasifs, tels que de carbure de silicium

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58130236A (ja) * 1982-01-27 1983-08-03 Nippon Koki Kk 金属材及びその製造方法
JPS60181278A (ja) * 1984-02-27 1985-09-14 Res Dev Corp Of Japan 超微粒子塗膜の形成法
JPS60184686A (ja) * 1984-02-29 1985-09-20 Res Dev Corp Of Japan セラミツク超微粒子焼成膜の形成法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2709213A (en) * 1952-04-01 1955-05-24 Air Reduction Method of hard surfacing
US2841687A (en) * 1954-02-18 1958-07-01 Union Carbide Corp Method of applying hard-facing metals
US2964419A (en) * 1958-03-27 1960-12-13 United States Steel Corp Method and apparatus for producing anti-skid tread plate
US3017689A (en) * 1958-03-27 1962-01-23 United States Steel Corp Anti-skid tread plate
GB1484023A (en) * 1974-08-07 1977-08-24 Mebac Inc Metal member having a non-skid surface and method of making same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2709213A (en) * 1952-04-01 1955-05-24 Air Reduction Method of hard surfacing
US2841687A (en) * 1954-02-18 1958-07-01 Union Carbide Corp Method of applying hard-facing metals
US2964419A (en) * 1958-03-27 1960-12-13 United States Steel Corp Method and apparatus for producing anti-skid tread plate
US3017689A (en) * 1958-03-27 1962-01-23 United States Steel Corp Anti-skid tread plate
GB1484023A (en) * 1974-08-07 1977-08-24 Mebac Inc Metal member having a non-skid surface and method of making same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988003457A1 (fr) * 1986-11-05 1988-05-19 Werner Foppe Procede de fabrication de fraises par implantation de macrograins de materiaux abrasifs, tels que de carbure de silicium

Also Published As

Publication number Publication date
JPS5511197A (en) 1980-01-25

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19801118

RIN1 Information on inventor provided before grant (corrected)

Inventor name: WITTELS, WILLIAM