Basic knowledge of vanadium nitrogen alloy

Vanadium-nitrogen alloy is a new alloy additive that can replace ferrovanadium for the production of microalloyed steel. Adding vanadium nitride in the process of steelmaking can improve the comprehensive properties of steel such as strength, toughness, ductility and thermal fatigue resistance, and can make the steel have good weldability. When the same strength is achieved, the addition of vanadium nitride saves 30-40% of the amount of vanadium added, thereby reducing the cost. The appearance of vanadium-nitrogen alloy is silver-gray metallic luster block. With the increase of vanadium content in the alloy, the metallic luster is enhanced, the hardness is increased, and the oxygen content is increased. When the vanadium content is more than 85%, the product is not easy to break, and the surface is easy to form an oxide film after long-term storage.
 
The use of vanadium nitrogen alloy is mainly to greatly increase the strength of steel and improve the comprehensive properties of steel toughness through grain refinement and precipitation strengthening; the steel bar added with vanadium nitrogen alloy has low cost, stable performance, small strength fluctuation, cold bending , excellent welding performance, and basically no aging; adding vanadium-nitrogen alloy does not need to change the current production process of II-grade rebar in iron and steel enterprises, and has no special requirements for temperature control and controlled rolling, especially suitable for iron and steel enterprises in existing production equipment and process conditions Under this circumstance, the upgrading of rebar products from grade II to grade III, grade IV and even grade V will be realized rapidly. Vanadium nitrogen alloys are also widely used in products such as thin slab continuous casting and rolling high-strength strip steel, non-quenched and tempered steel, high-strength H-beam, high-speed tool steel, high-strength pipeline steel, etc., to improve the strength of steel through microalloying, It is an economical and effective way to improve and enhance the toughness and other comprehensive properties of steel.
 
At present, vanadium nitrogen alloy has become an essential alloy additive in iron and steel smelting. At the same time, the advantages of improved steel performance, convenient use, less loss, and cost savings provide broad development prospects for vanadium-nitrogen alloys.