Preparation method of CrVNb composite reinforced HRB600E high-strength aseismic steel bar with nominal diameter of 40mm

• Main Authors: CHEN WEI, ZHANG BOWEN, LI GUANGWEI, WEN YUBING, YANG YING, SU GUOWU, LIU LINGANG, PI ZHONGQUAN, CHEN AILIN, CHEN DASHUANG, ZOU YINGCHUN
• Format: Patent
• Language: Chinese; English
• Published: 26.07.2024
• Subjects: ALLOYS; CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; METALLURGY OF IRON; PERFORMING OPERATIONS; POWDER METALLURGY; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; TRANSPORTING; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a preparation method of a CrVNb composite reinforced HRB600E high-strength aseismic steel bar with a nominal diameter of 40mm. By reasonably designing chemical components and adjusting a rolling process, the produced HRB600E high-strength aseismic steel bar with the nominal diameter of 40mm comprises the following chemical components in percentage by weight: 0.24 to 0.27 weight percent of C, 0.65 to 0.80 weight percent of Si, 1.40 to 1.60 weight percent of Mn, 0.11 to 0.15 weight percent of Cr, 0.115 to 0.135 weight percent of V, 0.015 to 0.021 weight percent of Nb and Slt, 0.035 wt%, Plt; the steel comprises the following components in percentage by weight: 0.035% of N, 0.020-0.028% of N, 0.54-0.58% of Ceq and the balance of Fe and inevitable impurities. The yield strength is 620-680 MPa, the tensile strength is 790-870 MPa, the percentage elongation after fracture is larger than or equal to 16.0%, the maximum force total elongation is larger than or equal to 10.0%, and the strength-t