PURPOSE: A wire rod for PC(pre-stressed concrete wire) is provided to add a target strength range of carbon and vanadium by using a steel producing process and a rolling process of wire rod for the PC with tensile strength of 125kg/mm¬2 to satisfy a strength of 200kg/mm¬2. CONSTITUTION: A brome casting piece is composed of 0.82-0.88wt% of carbon, 0.7-0.9wt% of manganese, under 0.3wt% of silicon, 0.2-0.3wt% of chrome, 0.04-0.07wt% of vanadium, under 0.01wt% of aluminum, and under 20ppm of nitrogen while containing 0.1% of incombustible medium with a size of under 20 micrometers. Moreover, the segregation density of the brome casting piece is under 1.2. Herein, the brome casting piece is wire rod rolled with a rolled steel piece for the wire rod to be cooled for a temperature of 750-800°C by using water. The cooled wire rod is cooled for the temperature of the deformation temperature of Ar1 at a cooling speed of 10-15°C/sec by using air.
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机译：用途：提供一种用于PC（预应力混凝土线）的线材，通过使用钢的生产工艺和用于拉伸强度为125kg / mm的PC的线材的轧制工艺来增加碳和钒的目标强度范围2满足200kg / mm 2的强度。组成：一个铸铜件是由0.82-0.88wt％的碳，0.7-0.9wt％的锰，0.3wt％的硅，0.2-0.3wt％的铬，0.04-0.07wt％的钒，0.01组成重量百分比为铝，氮含量低于20ppm，同时含有0.1％尺寸小于20微米的不可燃介质。另外，该溴铸件的偏析密度在1.2以下。在此，将溴铸件用轧制的钢片轧制成线材，以用于将线材用水冷却至750-800℃的温度。通过使用空气以10-15℃/秒的冷却速度将冷却的线材冷却至Ar1的变形温度。
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