HIGH STRENGTH WIRE ROD FOR PRESTRESSED CONCRETE STRANDED WIRE AND PRESTRESSED CONCRETE STRANDED WIRE AND MANUFACTURING METHOD THEREOF

摘要

PURPOSE: A high-strength wire rod for a Prestressed Concrete strand, a PC strand, and a manufacturing method thereof are provided to improve drawability by making pearlite interlamellar spacing minute through isothermal heat treatment. CONSTITUTION: A high-strength wire rod for a Prestressed Concrete strand comprises C 0.80~0.95 weight%, Si 0.8~1.6 weight%, Mn 0.3~0.8 weight%, Cr 0.1~0.5 weight%, P less than 0.015 weight%, residual Fe, and inevitable impurities. A modified structure is composed of pearlite more than 95% and ferrite or proeutectoid cementite.