Abstract: A method of casting a steel semi-product from a liquid steel, the steel semi-product having a targeted composition in titanium of at least 3.5% in weight.

Abstract: A steel sheet has a composition comprising, by weight: 0.010%?C?0.080%, 0.06%?Mn?3%, Si?1.5%, 0.005%?Al?1.5%, S?0.030%, P?0.040%, Ti and B such that: 3.2%?Ti?7.5% and (0.45×Ti)?1.35?B?(0.45×Ti)?0.43, optionally Ni?1%, Mo?1%, Cr?3%, Nb?0.1%, V?0.1%, the remainder being iron and unavoidable impurities resulting from the smelting. The steel sheet has a structure consisting of ferrite, at most 10% of austenite, and precipitates comprising eutectic precipitates of TiB2, the volume fraction of TiB2 precipitates with respect to the whole structure being of at least 9%, the proportion of TiB2 precipitates having a surface area lower than 8 ?m2 being of at least 96%.

Abstract: A metal powder for additive manufacturing having a composition including the following elements, expressed in content by weight: 0.01%?C?0.2%, 2.5%?Ti?10%, (0.45×Ti)?1.35%?B?(0.45×Ti)+0.70%, S?0.03%, P?0.04%, N?0.05%, O?0.05% and optionally containing: Si?1.5%, Mn?3%, Al?1.5%, Ni?1%, Mo?1%, Cr?3%, Cu?1%, Nb?0.1%, V?0.5% and including eutectic precipitates of TiB2 and optionally of Fe2B, the balance being Fe and unavoidable impurities resulting from the elaboration, the metal powder having a mean roundness of at least 0.70. The invention also relates to its manufacturing method by argon atomization.

Abstract: A steel sheet has a composition comprising, by weight: 0.010%?C?0.080%, 0.06%?Mn?3%, Si?1.5%, 0.005%?Al?1.5%, S?0.030%, P?0.040%, Ti and B such that: 3.2%?Ti?7.5% and (0.45×Ti) ?1.35?B?(0.45×Ti) ?0.43, optionally Ni?1%, Mo?1%, Cr?3%, Nb?0.1%, V?0.1%, the remainder being iron and unavoidable impurities resulting from the smelting. The steel sheet has a structure consisting of ferrite, at most 10% of austenite, and precipitates comprising eutectic precipitates of TiB2, the volume fraction of TiB2 precipitates with respect to the whole structure being of at least 9%, the proportion of TiB2 precipitates having a surface area lower than 8 ?m2 being of at least 96%.

Abstract: A steel sheet has a composition comprising, by weight: 0.010%?C?0.080%, 0.06%?Mn?3%, Si?1.5%, 0.005%?Al?1.5%, S?0.030%, P?0.040%, Ti and B such that: 3.2%?Ti?7.5% and (0.45×Ti)?1.35?B?(0.45×Ti)?0.43, optionally Ni?1%, Mo?1%, Cr?3%, Nb?0.1%, V?0.1%, the remainder being iron and unavoidable impurities resulting from the smelting. The steel sheet has a structure consisting of ferrite, at most 10% of austenite, and precipitates comprising eutectic precipitates of TiB2, the volume fraction of TiB2 precipitates with respect to the whole structure being of at least 9%, the proportion of TiB2 precipitates having a surface area lower than 8 ?m2 being of at least 96%.

Abstract: A steel sheet has a composition comprising, by weight: 0.010%?C?0.080%, 0.06%?Mn?3%, Si?1.5%, 0.005%?Al?1.5%, S?0.030%, P?0.040%, Ti and B such that: 3.2%?Ti?7.5% and (0.45×Ti)?1.35?B?(0.45×Ti)?0.43, optionally Ni?1%, Mo?1%, Cr?3%, Nb?0.1%, V?0.1%, the remainder being iron and unavoidable impurities resulting from the smelting. The steel sheet has a structure consisting of ferrite, at most 10% of austenite, and precipitates comprising eutectic precipitates of TiB2, the volume fraction of TiB2 precipitates with respect to the whole structure being of at least 9%, the proportion of TiB2 precipitates having a surface area lower than 8 ?m2 being of at least 96%.

Abstract: A process for secondary descaling of running metal strips, especially made of steel, during hot-rolling by-spraying water onto the surface of the running metal strips with spray rails having nozzles supplied with pressurized water, wherein the nozzles are supplied at a hydraulic pressure of from 3 to 30 bar, and wherein the nozzles are regulated so that heat flux density extracted from the strip (HF) resulting from the cooling of its surface by the sprayed water is between 6.5 and 20 MW/m2 for a strip temperature between 900 and 1100° C.