Vanadium oxide core-spun yarn for smelting vanadium microalloyed steel to increase vanadium content
A vanadium oxide and alloying technology, which is applied in the field of vanadium microalloyed steel vanadium-increasing additives outside the furnace, can solve the problems of increased labor intensity of workers, flying dust, high steelmaking costs, etc., and is conducive to safe production and vanadium volatilization Loss reduction and production cost reduction effect
Inactive Publication Date: 2014-02-12
马鞍山中冶钢铁冶金高新技术有限公司 +1
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Problems solved by technology
Its disadvantages are: the vanadium-containing alloy is expensive, and the cost of steelmaking is too high
Its defect is: V 2 o 5 Low melting point (943K), high saturated vapor pressure
Its disadvantages are: in the process of putting into the ladle, it not only increases the labor intensity of the workers; and the dust i
Method used
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Embodiment 1
[0044] The diameter of the cored wire is Φ13mm, and the thickness of the outer sheath steel strip is 0.42mm. 2 o 5 Powder 60, metal Al powder 39, impurity surplus. The weight per unit length of the cored wire is 378g / m, and the weight per unit length of the core wire is 205g / m. It is used for 50t ladle to smelt 15MnV steel, the feeding amount per furnace is 250m, the feeding line speed is 2.0~2.2m / s, and the feeding line blowing Ar amount is 0.005~0.008Nm 3 (t·min) -1 , blowing Ar for two minutes after feeding the line, the recovery rate of vanadium was 83.2%. The data are listed in Table 1.
Embodiment 2
[0046] With embodiment 1, data is listed in table 1.
Embodiment 3
[0048] With embodiment 1, data is listed in table 1.
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The invention relates to a vanadium oxide core-spun yarn for smelting vanadium microalloyed steel to increase the vanadium content, belongs to high-strength low-alloy steel, and particularly relates to a vanadium-content-increasing additive for external vanadium microalloyed steel refining. The vanadium oxide core-spun yarn comprises a yarn core and an outer cover, wherein the outer cover is tightly clad on the yarn core. The vanadium oxide core-spun yarn is characterized in that the yarn core is formed by fully mixing 60-75% of powdered vanadium oxide V2O5, 39-24% of a powdered reducing agent (aluminum powder), and the balance being impuritiesby weight percentage; the outer cover is a low-carbon steel strip, and the thickness is 0.32-0.45mm; the core-spun yarn is circular strip-shaped, and the diameter is phi 9-13mm; the weight ratio of the yarn core and the outer cover per meter is 1.16-1.22. The vanadium oxide core-spun yarn is prepared according to the steps of powder preparation, drying, batching, powder stirring, finished product packaging and checking. The vanadium oxide core-spun yarn has the advantages that the design is novel and the technical process of melting ferrovanadium is simplified; energy is saved, the consumption is reduced, and the production cost is reduced; the vanadium recovery rate is obviously improved, the defects of a large amount dust and the environmental pollution are further prevented, and the vanadium oxide core-spun yarn is beneficial to safe production.
Description
technical field [0001] The invention belongs to the field of low-alloy high-strength steel, and in particular relates to vanadium-increasing additives for refining vanadium microalloyed steel outside a furnace. Background technique [0002] Since the 1970s, the development of low-alloy high-strength steels in the world has entered a new period-new varieties of micro-alloyed steels have emerged. Compared with general low-alloy steel, micro-alloyed steel has significant economic advantages. It can save about 25% of steel and reduce the cost of about 10%. The mechanical properties and process performance of steel have been significantly improved to meet various special performance requirements. . [0003] Vanadium is an important alloying element and has obvious advantages in terms of metallurgical properties: the solubility of V (C, N) precipitates in austenite is higher than that of Nb, Ti alloying elements corresponding carbonitrides; V ( C, N) The precipitates can not onl...
Claims
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Inventor 黄志勇徐广治颜根发袁庭伟夏晶晶沙宣保
Owner 马鞍山中冶钢铁冶金高新技术有限公司
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