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
A vanadium-nitrogen alloy and cored wire technology, which is applied in the fields of cored wire and its application, vanadium-nitrogen alloyed molten steel and its preparation, and vanadium-nitrogen microalloyed steel, and achieves stable and stable recovery rate, high recovery rate, and yield strength and high yield strength. The effect of high tensile strength
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[0034] The invention provides a method for preparing vanadium-nitrogen alloyed molten steel. The method comprises: feeding the cored wire of the invention into molten steel to be vanadium-nitrogen alloyed for vanadium-nitrogen alloying.
[0035]According to the preparation method of vanadium-nitrogen alloyed molten steel of the present invention, in order to facilitate the rapid feeding of the cored wire into the molten steel, and at the same time in order to improve the yield strength and tensile strength of the vanadium-nitrogen micro-alloyed steel, it is preferable to carry out the vanadium-nitrogen alloying process , Carry out vanadium nitrogen alloying under dynamic conditions, dynamic conditions can be achieved by shaking or rotating the ladle, for example, the ladle can be shaken while the cored wire is fed into the molten steel in the ladle through the wire feeding device.
[0036] According to the preparation method of vanadium-nitrogen alloyed molten steel of the pres...
Embodiment 1
[0051] A cored wire A1 (outer diameter 12mm), including a core layer and an outer layer wrapping the core layer, the core layer is made of vanadium nitrogen alloy, silicon manganese nitride, iron alloy and iron calcium alloy powder (particle size 2mm or less), the outer layer is made of cold-rolled steel strip (brand St12), wherein, the powder contains vanadium-nitrogen alloy (VN16, vanadium content 78% by weight, N content 16% by weight): 97% by weight %, silicon manganese nitride (N content is 28% by weight, Si content is 40% by weight, Mn content is 10% by weight, the rest is a small amount of Fe and unavoidable other impurity elements): 1% by weight, iron alloy: 1% by weight %, iron-calcium alloy (Ca content is 30% by weight, and the rest is Fe and other unavoidable impurity elements): 1% by weight, wherein, the iron alloy is a mixed alloy of niobium-iron alloy and titanium-iron alloy, wherein, niobium-iron alloy and titanium-iron alloy The weight ratio is 1:1, the ferro-n...
Embodiment 2
[0053] A cored wire A2 (outer diameter of 12 mm), including a core layer and an outer layer wrapping the core layer, the core layer is made of vanadium-nitrogen alloy, silicon-manganese nitride, iron alloy and iron-calcium alloy powder (particle size 3mm or less), the outer layer is made of cold-rolled strip steel (brand St12), wherein, the powder contains vanadium-nitrogen alloy (VN16, vanadium content 78% by weight, N content 16% by weight): 47% by weight %, silicon manganese nitride (N content is 28% by weight, Si content is 40% by weight, Mn content is 10% by weight, and the rest is a small amount of Fe and unavoidable other impurity elements): 13% by weight, iron alloy: 25% by weight %, iron-calcium alloy (Ca content is 30% by weight, the rest is Fe and other unavoidable impurity elements): 15% by weight, wherein, the iron alloy is a mixed alloy of ferroniobium alloy and ferro-titanium alloy, wherein, ferro-niobium alloy and ferro-titanium alloy The weight ratio is 5:1, t...
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