| 摘要 |
PROBLEM TO BE SOLVED: To provide a high strength steel wire rod which has excellent wire drawability, and to provide a production method therefor. SOLUTION: The high strength steel wire rod has a ferrite single phase structure in which fine precipitates with a particle diameter of <10 nm are dispersively precipitated. The wire rod comprises, by mass,≤0.10% C,≤0.3% Si and≤2% Mn, 0.03 to 0.20% Ti and 0.05 to 0.6% Mo also so as to satisfy Ti/Mo: 0.2 to 2.0, further one or more kinds of metals selected from≤0.08% Nb,≤0.15% V,≤1.5% W,≤2% Ni and≤2% Cr, and the balance Fe with inevitable impurities wherein 0.5≤(C/12)/ä(Ti/48)+(Mo/96)+(Nb/93)+(V/51)+(W /192)}≤1.5 is satisfied. The steel having the above composition is heated at≥1,100°C, and is thereafter rolled at a finish rolling temperature of≥800°C. Subsequently, cooling is performed at 550 to 700°C at≤0.5°C/sec. COPYRIGHT: (C)2004,JPO
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