Ultra-high-strength rack steel rolling method for ocean platform

• Main Authors: LI XINLING, XIAO QINGSONG, SUI GUANGYU, LI JINGNIAN, YAO ZHEN, CONG JINGONG, WANG RUOGANG, ZHANG KUN, YING CHUANTAO
• Format: Patent
• Language: Chinese; English
• Published: 18.01.2019
• 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 relates to an ultra-high-strength rack steel rolling method for an ocean platform. Ultra-high-strength rack steel is prepared from the following chemical components by weight percent: 0.14% to 0.21% of C, 0.15% to 0.35% of Si, 0.95% to 1.30% of Mn, less than or equal to 0.035% of P, less than or equal to 0.035% of S, 1.00% to 1.50% of Cr, 1.50% to 2.00 % of Ni, 0.40% to 0.60% of Mo,0.03% to 0.08% of V, less than or equal to 0.15% of Cu, 0.020% to 0.040% of Nb, and the balance of Fe and inevitable impurities. The ultra-high-strength rack steel has the thickness of 150-210 mm; theyield strength is greater than or equal to 500 MPa; a rolling process comprises heating, phosphorus removal, rolling, slow cooling and flaw detection; by improving the technical process, the aim of utilizing existing equipment to produce 150-210mm ultra-high-strength rack steel is achieved, the product quality is stable, and the user need can be met. 本发明涉及种海洋平台用超高强度齿条钢轧制方法，超高强度齿条钢的化学成分按重量百分比计为：C 0.14％～0.21％，Si 0.15％～0.35％