EP0084785B1 - Perfectionnements aux dispositifs de trempe rapide sur bande d'un métal ou d'un alliage métallique - Google Patents

Perfectionnements aux dispositifs de trempe rapide sur bande d'un métal ou d'un alliage métallique Download PDF

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Publication number
EP0084785B1
EP0084785B1 EP83100113A EP83100113A EP0084785B1 EP 0084785 B1 EP0084785 B1 EP 0084785B1 EP 83100113 A EP83100113 A EP 83100113A EP 83100113 A EP83100113 A EP 83100113A EP 0084785 B1 EP0084785 B1 EP 0084785B1
Authority
EP
European Patent Office
Prior art keywords
crucible
chamber
belt
edge
outlet
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.)
Expired
Application number
EP83100113A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0084785A1 (fr
Inventor
Pascal Fournier
Jean-Claude Peraud
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.)
Pont a Mousson SA
Original Assignee
Pont a Mousson SA
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 Pont a Mousson SA filed Critical Pont a Mousson SA
Publication of EP0084785A1 publication Critical patent/EP0084785A1/fr
Application granted granted Critical
Publication of EP0084785B1 publication Critical patent/EP0084785B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/064—Accessories therefor for supplying molten metal

Definitions

  • the present invention relates to the manufacture of rapidly dipped ribbons, termed hyper-dipped, by spraying a liquid jet of the product to be dipped - metal or alloy - onto a cooled strip traveling at high speed. It relates more particularly to the technique according to which the contacting of the jet with the strip is carried out in an atmosphere at reduced pressure.
  • a device comprising a vacuum box, crossed by the movable band, into which are inserted not only a crucible provided with an orifice for ejecting the liquid jet, but the winding for heating by high frequency induction of the product. contained in the crucible.
  • Such a structure presupposes the production and maintenance in state of vacuum tight seals at the points of penetration of said crucible and of said winding through the wall of the enclosure.
  • This structure also implies that the enclosure is all the more voluminous and complex as the crucible is of greater capacity, because it is then necessary to pay special attention to the sealing of the enclosure and the holding in place of the crucible (to balance the forces exerted on the joint by atmospheric pressure), as well as the means of insulation and cooling.
  • the invention aims to eliminate these constraints.
  • the subject of the present invention is, in a device for hyper-tempering a metal or alloy in the molten state by spraying a jet of the product to be hyper-tempered, from a crucible, in the direction of a cooled strip moving at high speed inside an enclosure under reduced pressure, the improvement consisting in that said crucible is disposed outside said enclosure, above the latter, the lower part of said crucible, provided with a pouring orifice, sealingly resting on the edge of an opening made for this purpose at the top or in the cover of said enclosure.
  • said rim has a base of a shape complementary to that of the bottom of the crucible.
  • a seal or a sealing washer, of suitable shape, is preferably interposed between said seat and said bottom.
  • this sealing washer is made of a material which is a poor conductor of heat.
  • Another embodiment consists in using, to constitute the seat, a piece of material which is a poor conductor of heat, and in running in the crucible in contact with said seat.
  • FIG. 1 on which a moving strip 1 is seen, driven at high speed by means not shown, above a shoe 2 comprising, over at least part of its length, a box 2a, 2b for gas cushion with Coanda effect and, below a vacuum enclosure 3, one or more vacuum sockets 4, connected to a vacuum pumping assembly, not shown.
  • the enclosure 3 comprises a tubular support 5, forming an integral part of its cover 6 and whose upper end forming a rim 5 ′ is machined so that the bottom of a crucible 7 can be applied to it with good seating, with interposition, preferably, of a washer 8 made of refractory fibers, ensuring sealing and thermal insulation.
  • the side walls of the vacuum enclosure 3 bear, at their lower part, on the upper face of the shoe 2, the inlet part 9 and the outlet part 10 comprising, in the lower part, a niche of dimensions and shape suitable (not shown), constituting, with the upper face of the shoe 2, a slot, respectively for the entry of the strip 1 and for the exit of this strip carrying the hyper-dipped tape 11.
  • the parts 9 and 10 have seals for tightness on the enclosure 3 and can be erased, for example by sliding upwards, in the event of an incident, for example in the event of the tape sticking to the strip.
  • An inductor 12, disposed around the lower end of the crucible 7, allows the high-frequency induction heating of the product to be soaked 13 contained in the crucible and evacuated from it by a pouring orifice 14, in the direction of the strip 1 , to form the ribbon 11.
  • Additional means for melting and supplying molten product to said crucible 7, means not shown in FIG. 1, are advantageously arranged above the crucible to facilitate continuous operation of the installation. They allow in particular a regulation of the level of the product contained in the crucible 7, as well as the control of the nature and the pressure of the atmosphere surmounting the product in said crucible.
  • the outlet part 10 may comprise a wing at right angles to the actual wall, wing forming a tunnel or awning above the strip in the direction of the point of impact (I) of the liquid jet with the movable band.
  • annular groove 21 for example of trapezoidal section, has been formed in the thickness of the upper part of the tubular support 5, preferably near the external lateral surface of the latter.
  • the groove 21 thus allows a homogeneous distribution of the gas introduced (nitrogen, hydrogen, argon or, preferably, helium) through a tube 22.
  • the material constituting the seal 8 being permeable to gas, it is thus possible to oppose the entry of air in the enclosure and control the atmosphere in which the product to be hyper-soaked is poured.
  • FIGS 3 and 4 show particular examples of vacuum chambers according to the invention.
  • an airlock 31 is provided upstream, in the direction of movement of the moving strip, of the casting chamber 32 proper.
  • observation windows 33 can be provided laterally in the enclosure, as shown in FIG. 4.
  • the device according to the invention has made it possible to manufacture ribbons of metallic glasses with excellent surface qualities, and very well toughened, while maintaining a reduced pressure in the pouring chamber, of the order of a tenth of an atmosphere.
  • a very low helium flow rate, for example of one liter per minute, is sufficient to avoid any entry of air at the joint 8.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
EP83100113A 1982-01-21 1983-01-08 Perfectionnements aux dispositifs de trempe rapide sur bande d'un métal ou d'un alliage métallique Expired EP0084785B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8200896A FR2519892A1 (fr) 1982-01-21 1982-01-21 Perfectionnements aux dispositifs de trempe rapide sur bande d'un metal ou d'un alliage metallique
FR8200896 1982-01-21

Publications (2)

Publication Number Publication Date
EP0084785A1 EP0084785A1 (fr) 1983-08-03
EP0084785B1 true EP0084785B1 (fr) 1985-04-24

Family

ID=9270192

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83100113A Expired EP0084785B1 (fr) 1982-01-21 1983-01-08 Perfectionnements aux dispositifs de trempe rapide sur bande d'un métal ou d'un alliage métallique

Country Status (7)

Country Link
US (1) US4573520A (enrdf_load_stackoverflow)
EP (1) EP0084785B1 (enrdf_load_stackoverflow)
JP (1) JPS58136725A (enrdf_load_stackoverflow)
BR (1) BR8300204A (enrdf_load_stackoverflow)
DE (1) DE3360130D1 (enrdf_load_stackoverflow)
ES (1) ES519036A0 (enrdf_load_stackoverflow)
FR (1) FR2519892A1 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2676946A1 (fr) * 1991-05-27 1992-12-04 Michelin & Cie Procede et dispositif pour obtenir un fil en alliage metallique amorphe a base de fer.
FR2700282B1 (fr) * 1993-01-13 1995-03-03 Seva Procédé et installation de fabrication de rubans métalliques amorphes par hypertrempe.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2285847A (en) * 1941-08-26 1942-06-09 J K Smit & Sons Inc Apparatus for making diamond tools
US2384500A (en) * 1942-07-08 1945-09-11 Crown Cork & Seal Co Apparatus and method of coating
US3670400A (en) * 1969-05-09 1972-06-20 Nat Res Dev Process and apparatus for fabricating a hot worked metal layer from atomized metal particles
JPS5668558A (en) * 1979-11-07 1981-06-09 Hitachi Metals Ltd Vacuum space generating device
FR2471824A1 (fr) * 1979-12-20 1981-06-26 Hitachi Ltd Appareil pour la fabrication d'un ruban metallique
US4274473A (en) * 1980-01-14 1981-06-23 Allied Chemical Corporation Contour control for planar flow casting of metal ribbon

Also Published As

Publication number Publication date
US4573520A (en) 1986-03-04
ES8308733A1 (es) 1983-10-16
DE3360130D1 (en) 1985-05-30
JPS58136725A (ja) 1983-08-13
BR8300204A (pt) 1983-10-11
FR2519892B1 (enrdf_load_stackoverflow) 1984-03-23
EP0084785A1 (fr) 1983-08-03
JPH0317584B2 (enrdf_load_stackoverflow) 1991-03-08
ES519036A0 (es) 1983-10-16
FR2519892A1 (fr) 1983-07-22

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