HIGH-STRENGTH WIRE ROD TO BE INDUCTION-HARDENED SUPERIOR IN COLD WORKABILITY AND IMPACT RESISTANCE, AND STEEL COMPONENT USING THE WIRE ROD

PROBLEM TO BE SOLVED: To provide a high-strength wire rod to be induction-hardened which has further improved cold workability and impact resistance. SOLUTION: The high-strength wire rod to be induction-hardened has a composition comprising 0.23-0.34% C, 0.16% or more Si, 1.6% or less Mn, 1.6% or less Ni, 0.8% or less Cr, 0.15% or less Mo and 0.0005-0.005% B in such a range as to make a DI value to be 48 to 98 in the following expression (1) (wherein γ is 13.5); further 0.015% or less P, 0.015% or less S, 0.06% or less Al and 0.0015-0.007% N; in addition, 0.018-0.07% Ti and/or 0.01-0.04% Nb; V controlled to 0.01% or less; and the balance Fe with unavoidable impurities: and has a ferritic-pearlitic structure or a ferritic-pearlitic-bainitic structure. COPYRIGHT: (C)2005,JPO&NCIPI