Product that is hot rolled into long steel and use thereof

Abstract

The present invention refers to a hot rolled long steel product (wire rod and bar) of ultra-low carbon steel (UBC), interstitial-free, for use in drawn wires and rods. In this way, the product obtained through the hot rolling process of long steels using IF-type ultra-low carbon steel has different mechanical features, such as: high capacity of cold-forming, high capacity of area reduction in the tensile assay (87-94%), improved limit of resistance and outflow limit and high drawing capacity.

1 . Hot rolled long steel product, characterized in that it comprises interstitial-free, ultra-low carbon steel, wherein said ultra-low carbon steel is stabilized by titanium, and that the composition of said steel comprises the following percentage ranges by weight: 0.0010 to 0.0055% of C, 0.0020 to 0.0060% of N, 0.0040 to 0.025% of S and 0.040 to 0.100% of Ti. 
     
     
         2 . Product, according to  claim 1 , characterized in that it presents an area reduction value in the uniaxial tensile assay between 87% and 94%. 
     
     
         3 . Hot rolled long steel product, characterized in that it comprises interstitial-free, ultra-low carbon steel, wherein said ultra-low carbon steel is stabilized by titanium and niobium, and that the composition of said steel comprises the following percentage ranges by weight: 0.0010 to 0.0055% of C, 0.0020 to 0.0060% of N, 0.0040 to 0.025% of S, 0.010 to 0.060 of Ti and 0.010 to 0.050% of Nb. 
     
     
         4 . Product, according to  claim 3 , characterized in that it presents an area reduction value in the uniaxial tensile assay between 87% and 94%. 
     
     
         5 . Use of a hot rolled long steel product, as it is defined in  claim 1  or  3 , characterized in that it is for use in cold drawn wires. 
     
     
         6 . Use, according to  claim 5 , characterized in that it is for use in wire rods and bars. 
     
     
         7 . Use, according to  claim 5 , characterized in that it is for use in drawn bars and wires. 
     
     
         8 . Use, according to  claim 5 , characterized in that it is for use in pins, rods and fasteners selected from the group consisting of screws, nuts, nails, staples and rivets.