Phi 14 mm high-strength wire rod for manufacturing of 1(7-21.6)/1770 MPa prestressed steel strand and production method of phi 10 mm high-strength wire rod

• Main Authors: ZHAI YOUYOU, FAN WEI, FU HONGWEI
• Format: Patent
• Language: English
• Published: 29.07.2015
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a phi 14 mm high-strength wire rod for manufacturing of a 1*(7-21.6)/1770 MPa prestressed steel strand and a production method of the phi 14 mm high-strength wire rod. The phi 14 mm high-strength wire rod is rolled from a one-heating formed 150*150 mm square steel billet by designing chemical components, controlling the addition of Cr, V and other alloy elements into steel, and adopting a rolling cooling technology matched with such components, and can be used for replacing a twice-heating formed phi 15.5 mm 82B wire rod produced from cogging of a large square steel billet. The production method comprises the following steps: 1, converter smelting; 2, ladle furnace (LF) refining; 3, continuous casting production; 4, steel rolling production. The production cost of the phi 14 mm high-strength wire rod is greatly reduced, the product performance is stable, and the using requirement of a user can be met; after the twice-heating formed phi 15.5 mm 82B wire rod is replaced by the phi 14 mm high-strength wire rod, the times of high energy-consuming cold rolling pass drawing can be reduced, so that the power consumption, the equipment abrasion and the maintenance cost are reduced, the steel wire lubrication effect during a drawing process is improved, favorable conditions are created for drawing speed improvement, and then the deep processing efficiency is improved; meanwhile, the improvement of the steel wire plasticity index after the drawing process is facilitated, and the processing and using performance of a steel stand is improved.