Ti and Cr contained microalloy building steel wire rod and LF production method thereof

• Main Authors: DENG TONGWU, LEI XIUHUA, LIU MING, WANG XIJIANG
• Format: Patent
• Language: Chinese; English
• Published: 24.04.2018
• 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 belongs to the field of ferrous metallurgy, and particularly relates to a Ti and Cr contained microalloy building steel wire rod and an LF production method thereof. In order to solve the problems that an existing vanadium nitride alloy for preparing nitrogen containing alloyed steel is low in nitrogen content and little in kind, the invention provides the Ti and Cr contained microalloy building steel wire rod and the LF production method therefore. The steel wire rod comprises, by weight percent, 0.15 to 0.30% of C, 0.30 to 1.00% of Si, 0.60 to 1.30% of Mn, 0.0060 to 0.0180% ofN, not larger than 0.040% of P, not larger than 0.040% of S, 0.010 to 0.050% of Ti, 0.10 to 0.60% of Cr and the balance Fe and inevitable impurities. The preparing method is characterized in that an Ncontained cored wire is fed into an LF, and the N is adjusted to the proper level. The method is easy to operate, the nitrogen yield is high and stable, production cost can be effectively reduced, and the steel wire rod is wo