Nb and Cr containing microalloy building steel wire rod and LF furnace production method thereof

• Main Authors: DENG TONGWU, LEI XIUHUA, LIU MING, WANG XIJIANG
• Format: Patent
• Language: Chinese; English
• Published: 20.03.2018
• 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 an Nb and Cr containing microalloy building steel wire rod and an LF furnace production method thereof. The Nb andCr containing microalloy building steel wire rod and the LF furnace production method thereof are provided according to the problems that vanadium nitride alloys selected for preparing nitrogen containing alloy steel in the prior art are low in nitrogen content, few in kind and the like. The steel wire rod comprises, by weight percent, 0.15%-0.30% of C, 0.30%-1.00% of Si, 0.60%-1.30% of Mn, 0.0060%-0.0180% of N, not larger than 0.040% of P, not larger than 0.040% of S, 0.010%-0.050% of Nb, 0.10%-0.60% of Cr and the balance Fe and inevitable impurities. The preparation method of the steel wirerod is characterized in that an N containing cored wire is fed into an LF furnace, and N is adjusted to the proper level. The method is simple in operation, the nitrogen yield is high and stable, theproduction cost can be eff