V-Nb-Ti-and-Cr-containing microalloy building steel wire rod and ladle furnace (LF) 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 iron and steel metallurgy and particularly relates to a V-Nb-Ti-and-Cr-containing microalloy building steel wire rod and a ladle furnace (LF) production method thereof. The problem that a vanadium nitride alloy selected for preparing nitrogen-containing alloy steel is low in nitrogen content and small in variety is solved. The V-Nb-Ti-and-Cr-containing microalloy building steel wire rod comprises the components of, by weight, 0.15-0.30% of C, 0.30-1.00% of Si, 0.60-1.30% of Mn, 0.0060-0.0180% of N, 0.040% of P or the less, 0.040% of S or the less, 0.010-0.080% of V, 0.010-0.030% of Nb, 0.010-0.030% of Ti, 0.10%-0.60% of Cr and the balance Fe and inevitable impurities. According to the key of the preparation method, a nitrogen-containing core-spun yarnis fed into an LF, and nitrogen is adjusted to the appropriate level. The method is easy to operate, the yield of nitrogen is high and stable, the production cost can further be effectively reduced, and the V-Nb-Ti-and-Cr-con