NON-HEAT TREATED WIRE ROD HAVING EXCELLENT MACHINABILITY AND IMPACT TOUGHNESS AND METHOD FOR MANUFACTURING THEREOF

摘要

Provided are a non-tempered wire rod having excellent machinability and impact toughness and a method for manufacturing the same. The non-tempered wire rod of the present invention, by weight%, C: 0.15 to 0.40%, Si: 0.05 to 0.5%, Mn: 0.5 to 2.0%, Cr: 1.0% or less, P: 0.03 or less%, S: more than 0.03% 0.05% or less, sol.Al: 0.01~0.07%, N: 0.01% or less, and Nb: 0.1% or less, V: 0.5% or less, and Ti: 0.1% or less, the balance contains Fe and unavoidable impurities; , has a wire rod microstructure including ferrite and pearlite, wherein the ferrite is formed continuously or discontinuously at predetermined intervals along a direction parallel to the wire rolling direction to form a plurality of ferrite layers, and the pearlite is a wire rod A plurality of pearlite layers are formed continuously or discontinuously on the outside or inside of the ferrite layer in a direction parallel to the rolling direction.