Societe Nationale D'etude Et De Construction De Moteurs D'aviation

Compagnie Europeenne Du Zirconium Cezus

Union Siderurgique Dunord Et De L'est De La France (Usinor)

Other

Jeumont Schneider Corporation

Union Siderurgique Du Nord Et De L'est De La France

The Japan Research and Development Center for Metals

Marcel Garnier

Claude Senillou

Jean-Charles Joud

Remy De Framond

Ali R Yavari

Patrick Paillere

Christian A Ducrocq

Pascal J Rivat

Ludovic Edmond Camille Molliex

Edouard Alheritiere

Jean Driole

Yves Delannoy

Jean V D'Obrenan

Gerard Lemaitre

Pascal Gardin

Jean Hamburger

Maurita Roscini

Jean-Yves Lamant

Yves Christian Louis Alain Honnorat

Isabelle Gleizes

Jose Feigenblum

Pierre Vernay

Jean-Marie Galpin

Gerard Weiss

Pierre M Vernay

Jacqueline Etay

Annie Gagnoud

Bruno Jacques Gerard Dambrine

The invention concerns a method which consists in: simultaneously subjecting the meniscus of the molten metal present in the ingot mould to the action of an axial alternating electromagnetic field tending to provide it with a general dome-like shape and to the action of a transverse direct electromagnetic field designed to attenuate the surface agitation of the meniscus. The implementing installation comprises an ingot mould ( ) with cooled assembled plates ( and ) for casting metal slabs, an alternating current coil ( ) enclosing the ingot mould at the meniscus ( ) of the molten metal to produce an axial magnetic field, collinear with the casting axis ( ), and a direct magnetic field winding passing through the large plates of the ingot mould at the meniscus ( ) perpendicular to the casting axis.

Method for vertical continuous casting of metals using electromagnetic fields and casting installation therefor

The invention concerns a method for metal coating of fibres (,) by liquid process, said method being particularly but not exclusively designed for coating in thick and even layers (,) with metals and metal alloys having high melting point and reactivity. Said method is characterised in that it consists in moving along the stretched fibre (,) in the liquid metal maintained in levitation in a well (,), said fibre (,) passing through orifices (,) provided in the well (,) wall (,), said orifices (,) being arranged on either side of the liquid metal at places where the liquid metal (,) is not in contact with said wall (,).

Method for metal coating of fibres by liquid process

The invention relates to a process for separating the constituents of an alloy, especially an alloy comprising a refractory base metal and at least one nonrefractory additive metal, which consists in:

Process and device for separating the constituents of an alloy

In a method of remelting metallic materials, particularly nickel-based superalloys, in which the melting operation is carried out in a cooled copper crucible under clean vacuum conditions by means of electromagnetic inductors, the magnetic field applied to the mass of molten metal has a frequency between 50 Hz and 5.times.10.sup.6 Hz, preferably between 5.times.10.sup.3 Hz and 5.times.10.sup.5 Hz, so as to effect simultaneously electromagnetic stirring of the liquid metal and a surface concentration at the cold walls of the mass to be recast of all the non-conductive particles, especially ceramic inclusions, thereby achieving an inclusion decanting.

Inclusion decanting process for nickel-based superalloys and other

An electro-magnetic nozzle device for controlling the jet of liquid metal tapped at the outlet of a melting crucible comprises an electro-magnetic inductor and a magnetic field concentrator which surrounds the outlet of the crucible and is constituted by at least four three-dimensional sectors arranged evenly around the crucible outlet and separated from each other by radial slits, each sector having an internal water-cooled cavity, radially inner and outer walls of which the inner wall is of less height than the outer wall, and windings disposed in the inner and outer walls forming an electro-magnetic inductor.

Electro-magnetic nozzle device for controlling a stream of liquid metal

The present invention relates to a cold crucible adapted to be discharged through the bottom. The crucible consists of a conductive wall consisting of a plurality of longitudinal hollow segments which are electrically insulated at least partially from one another and which are by virtue of the longitudinal hollows adapted to be traversed internally by a cooling fluid and which crucible is adapted to be placed inside an inductor and in which the wall is provided in its bottom part with an aperture inside which there is a removable occluding member, formed of segments which member is cooled like the wall of the crucible. The crucible is used in the processing of materials of high purity which can be recovered in the liquid state in a convenient complete and rapid manner.

Bottom discharge cold crucible

The invention relates to the preparation of especially metallic or semi-metallic bands or sheets, particularly with a microcrystalline or amorphous structure. According to this process, an electrically conductive molten material is made to flow from a tank through a nozzle, to form a strip of substantially rectangular cross-section, which is subsequently solidified. According to the invention, the form of the strip of liquid material is stabilized, after it has been shaped and before solidification, as a result of a mechanical surface effect induced by an alternating magnetic field.

Process and apparartus for preparing especially metallic and

Process and apparatus for preparing especially metallic and

Apparatus for melting and continuously casting metals, comprising a vertical, conductive cold crucible (1) with at least part of the height of its wall in the form of longitudinal sectors (2) which are electrically insulated from one another and have a cooling fluid running through them; an inductor (6) with coils helically surrounding the crucible (1) over part of its height and supplied with alternating current both for heating and confining the metal; a system for drawing down the ingot; and possibly a chamber with a controlled external atmosphere, separating at least the contents of the crucible (1) from the external atmosphere, characterized in that the crucible (1) has an upper zone (4) divided into sectors, with parallel vertical generating lines, and a lower zone (5) divided into sectors and joined to the upper zone (4), the generating lines of the lower zone spreading apart in a downward direction from the join (45) between the two zones (4 and (5), and that the lowest coil (60) of the inductor (6) is at the level of that join (45). The apparatus of the invention is advantageously used for melting and casting refractory metals and other materials.

Apparatus for melting and continuous casting of metals, the process

Process for preparing especially metallic and semi-metallic bands of

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Uriage, France

Marcel Garnier