Cored wire, its application, vanadium and nitrogen alloyed molten steel, preparation method of vanadium and nitrogen alloyed molten steel, and vanadium and nitrogen micro-alloyed steel

• Main Authors: CHENG XINGDE, WANG JIAN, LUO KAIJIN, ZHANG GUOCAI, LIU MING, WANG YICHENG
• Format: Patent
• Language: Chinese; English
• Published: 17.09.2014
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention provides a cored wire and its application. The cored wire comprises a core layer and an external layer wrapping the core layer, wherein the core layer is a mixture containing a vanadium-nitrogen alloy, manganese silicon nitride, an iron alloy and an aluminum-iron alloy, and the iron alloy is a niobium-iron alloy and/or a titanium-iron alloy. The invention also provides a vanadium and nitrogen alloyed molten steel, and a preparation method thereof. The method comprises the steps of feeding the cored wire into molten steel to be vanadium and nitrogen alloyed, and carrying out vanadium and nitrogen alloying. The invention further provides a vanadium and nitrogen micro-alloyed steel. The vanadium and nitrogen micro-alloyed steel is obtained by casting the vanadium and nitrogen alloyed molten steel. The cored wire can be used for realizing the alloying of molten steel vanadium and nitrogen, can effectively increase the oxygen content as needed without influencing the vanadium content, enables vanadiu