Wire Rod And Parts With Improved Delayed Fracture Resistance, And Methods For Manufacturing Same

Abstract: Disclosed are a wire rod and parts with improved delayed fracture resistance, and methods for manufacturing same. The wire rod with improved delayed fracture resistance according to the present invention comprises 0.15 to 0.30 wt% of C, 0.15 to 0.25 wt% of Si, 0.95 to 1.35 wt% of Mn, at most 0.030 wt% of P, at most 0.030 wt% of S, 0.015 to 0.030 wt% of Ti, 0.0010 to 0.0040 wt% of B, and 0.0010 to 0.0080 wt% of N, with the balance being Fe and inevitable impurities, and satisfies relational expression 1. [Relational expression 1] 2.0=5.5?[Si]+[Mn]=2.4 (in relational expression 1, [Si] and [Mn] each represent the content (wt%) of the corresponding element.

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