Core spun yarn and application thereof, vanadium nitrogen alloyed molten steel and preparation method thereof, and vanadium nitrogen microalloyed steel

• Main Authors: CHENG XINGDE, WANG JIAN, LUO KAIJIN, ZHANG GUOCAI, LIU MING, WANG YICHENG
• Format: Patent
• Language: Chinese; English
• Published: 24.09.2014
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; METALLURGY OF IRON; 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 provides a core spun yarn and application thereof. The core spun yarn comprises a core layer and an outer layer wrapping the core layer, and the core layer is a mixture comprising vanadium nitrogen alloy, manganese silicon nitride, niobium iron alloy and aluminum iron alloy. The invention provides vanadium nitrogen alloyed molten steel and a preparation method thereof, and the method includes feeding of the core spun yarn into the to-be-vanadium and nitrogen alloyed molten steel for vanadium nitrogen alloying. The invention provides vanadium nitrogen microalloyed steel, and the vanadium nitrogen microalloyed steel is casted by the vanadium nitrogen alloyed molten steel. The core spun yarn is used for realizing molten steel vanadium and nitrogen alloying, nitrogen content can be effectively increased without affecting on the vanadium content according to the need, vanadium containing steel with higher nitrogen content can be produced in the need of the molten steel, and the recovery rate of nitro