Wire rod for prestressed concrete spiral rib steel wire and production method thereof

• Main Authors: WEI FULONG, GUO XIANG, TENG LULU, LI YONG, HUA FUBO, LAN GUINIAN
• Format: Patent
• Language: Chinese; English
• Published: 10.06.2022
• 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; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a production method of a wire rod 82B-2 for a prestressed concrete spiral rib steel wire. The production method comprises the steps of smelting, deoxidation alloying, LF ladle refining, continuous casting, heating, rolling and cooling. After being smelted and alloyed by a converter, the alloy comprises the following elements in percentage by weight: 0.83%-0.86% of C, 0.15%-0.35% of Si, 0.60%-0.90% of Mn, less than or equal to 0.020% of P, less than or equal to 0.015% of S, 0.20%-0.30% of Cr and the balance of iron. The product obtained through the method is stable in performance, the tensile strength Rm of the product is larger than or equal to 1180 MPa, the fracture surface expansion and contraction rate Z reaches 35% or above, and the method can be used for manufacturing the 1570 MPa prestressed concrete spiral rib steel wire. 本发明公开了一种预应力混凝土螺旋肋钢丝用盘条82B-2的生产方法，包括冶炼、脱氧合金化、LF钢包精炼、连铸、加热、轧制、冷却。通过转炉冶炼及合金化后成分重量百分数的元素组成达到：C：0.83％-0.86％，Si：0.15％-0.35％，Mn：0.60％-0.90％，P≤0.020％，S≤0.015％，Cr：0.20％