Abstract: A cored wire (1; 100) intended to be injected into a molten metal bath to perform metallurgical treatment, the cored wire comprising: a fill (2) extending locally along a longitudinal axis (L), the fill comprising at least one active substance to treat the molten metal; and an outer sheath (4) extending longitudinally around the fill, characterized in that the fill comprises: an extruded bar (8) extending longitudinally and comprising the active substance; and an intermediate layer (10) extending longitudinally between the extruded bar and the outer sheath and comprising a powder containing one or more from among: a metal, a mixture of metals, a metal oxide, a mixture of metal oxides.

Abstract: A cored wire for introducing additive into a bath of liquid steel, of the type comprising a metal sheath surrounding said additive, characterized in that said additive predominantly comprises calcium silicate. A process for manufacturing a resulfurized steel, characterized in that it comprises a step of introducing, into the bath of liquid steel, such a cored wire.

Abstract: Powder which is for a flux-cored wire intended to become alloyed with a molten metal bath and which is formed by particles composed with at least 95% of sulphur, characterised in that its granulometric population is defined by: ?1 ?m?d10?340 ?m; ?200 ?m d50?2000 ?m; ?500 ?m d90?2900 ?m. Sulphur-based flux-cored wire, characterised in that it contains the preceding powder, and in that the compaction rate of the powder within the wire is greater than or equal to 85%. Method for producing a sulphur-based flux-cored wire for alloying with molten metal baths.

Abstract: A cored wire for introducing additive into a bath of liquid steel, of the type comprising a metal sheath surrounding said additive, characterized in that said additive predominantly comprises calcium silicate. A process for manufacturing a resulfurized steel, characterized in that it comprises a step of introducing, into the bath of liquid steel, such a cored wire.

Abstract: Powder which is for a flux-cored wire intended to become alloyed with a molten metal bath and which is formed by particles composed with at least 95% of sulphur, characterised in that its granulometric population is defined by: —1 ?m?d10?340 ?m; —200 ?m d50?2000 ?m; —500 ?m d90?2900 ?m. Sulphur-based flux-cored wire, characterised in that it contains the preceding powder, and in that the compaction rate of the powder within the wire is greater than or equal to 85%. Method for producing a sulphur-based flux-cored wire for alloying with molten metal baths.

Abstract: The present invention relates to an additive in the form of flux-cored wire for treating baths of liquid steel with a view to obtaining steels having a high lead content. The additive comprising metallic lead and/or one or more lead alloys according to the invention for treating baths of liquid steel, and is in the form of flex-cored wire composed of a metal sheath and a finely divided filling material, the latter being composed of a powder of metallic lead and/or of lead alloy and of a powder containing a material capable of releasing a gas, which is inert with respect to the liquid steel, at the temperature of the liquid steel bath. Characteristically, the powder of metallic lead and/or of lead alloy includes a particle size fraction GR between 200 ?m and 500 ?m and the particle size fraction GR has the following characteristics: —through a 200 ?m sieve: GR<5%; —through a 300 & ?m sieve: 90% 3GR3 10%; —through a 400 ?m sieve: 40% £ GR<100%; —through a 500 ?m sieve: 100% 3GR3 90%.