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: A method for introducing a cored wire into a bath of molten metal includes extracting the cored wire from a reel, and making it run into the molten metal bath, one part of the path traveled by the cored wire being formed in a guide tube with a distal end at a defined height above the metal bath's surface. The cored wire is driven and straightened under conditions practically not altering its substantially circular cross section and allowing it to be vertically introduced and penetrate into the depth of the bath. Elements for driving the cored wire from a reel, a guide tube for guiding the cored wire, and elements for straightening the cored wire are placed in front of its entry into the guide tube, the straightening elements giving the cored wire a straight direction without altering its circular cross section.

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: Cored wire including at least one thermal barrier layer, distinguished by the fact that said layer is made of a material that pyrolizes upon contact with a metal bath such as liquid metal.

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%.

Abstract: A method for introducing a cored wire into a bath of molten metal includes extracting the cored wire from a reel, and making it run into the molten metal bath, one part of the path traveled by the cored wire being formed in a guide tube, whose distal end is at a defined height above the surface of the metal bath. The cored wire is driven and subjected to a straightening operation under conditions practically not altering its substantially circular cross section and allowing it to be introduced and penetrate into the depth of the bath in a vertical direction. The installation includes elements for driving the cored wire from a reel, a guide tube for guiding the cored wire, and elements for straightening the cored wire that are placed in front of its entry into the guide tube, the straightening elements being capable of giving the cored wire a straight direction without altering its circular cross section.

Abstract: Cored wire including at least one thermal barrier layer, distinguished by the fact that said layer is made of a material that pyrolizes upon contact with a metal bath such as liquid metal.