Methof for manufacturing prestressing wire and prestressing strand having high stress corrosion feature And Prestressing Wire and Wrestressing Strand using the same

摘要

The present invention relates to a method of manufacturing a nickel plated high strength PC steel wire excellent in stress corrosion property. The present invention relates to a method for producing a steel sheet, comprising: 0.95 to 1.1 wt% of C; 1.1 to 1.5 wt% of Si; 0.4 to 0.6 wt% of Mn; 0.4 to 0.6 wt% of Cr; 0.015 wt% , P: not more than 0.015% by weight (not including 0%) and the balance of Fe and unavoidable impurities is nickel-plated before winding in a winding machine after pulling out and the tensile strength is made to be 2400 MPa or more .