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WIRE ROD FOR COLD HEADING HAVING EXCELLENT DELAYED FRACTURE RESISTANCE CHARACTERISTICS, PARTS, AND MANUFACTURING METHOD THEREFOR
WIRE ROD FOR COLD HEADING HAVING EXCELLENT DELAYED FRACTURE RESISTANCE CHARACTERISTICS, PARTS, AND MANUFACTURING METHOD THEREFOR
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机译:用于冷镦的线材具有优异的延迟断裂特性,零件和制造方法
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摘要
Provided are a wire rod for cold heading having excellent delayed fracture resistance characteristics, parts, and a method for manufacturing same. The wire rod of the present invention comprises, by wt%, 0.3-0.5% of C, 0.01-0.3% of Si, 0.3-1.0% of Mn, 0.5-1.5% of Cr, 0.5-1.5% of Mo, 0.5-2.0% of Ni, 0.01-0.4% of V, and the remainder of Fe and other impurities, and the wire rod has a chemical composition satisfying relational expression 1, and has a microstructure comprising, by area%, 5-20% of martensite, 0.1-1% of pearlite, and the remainder of bainite.
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