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首页> 外文会议>International Conference on Microalloying for New Steel Processes and Applications; 20050907-09; Basque Country(ES) >Improvement of low Carbon Steel Properties through V-N Microalloying
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Improvement of low Carbon Steel Properties through V-N Microalloying

机译：通过V-N微合金化改善低碳钢性能

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摘要

To improve the strength properties of vanadium bearing low carbon steel, nitrogen is often added to the liquid steel. The source of the nitrogen addition can be in many different forms. The recovery of nitrogen from the addition is variable due to the low solubility of nitrogen in steel. In this work, nitrogen-enriched alloy (Nitrovan) was added under open atmosphere. To deduce the nitrogen role, two alloys were chosen that having the same vanadium content. One of them was Ferro-Vanadium as a source of vanadium, whereas Nitro-Vanadium used as a source of vanadium and nitrogen. Ferro-vanadium as well as Nitro-vanadium was added separately in the ladle after completely melting of carbon steel and proper superheat using 100 Kg induction furnace. The effect of adding nitrogen-enriched alloy on mechanical properties of the steel was investigated. For this purpose, four heats were produced and cast into sand moulds. The general trend of results shows higher mechanical properties through increasing nitrogen content. The experimental work indicates that enhanced nitrogen content promotes the precipitation of V(C,N) and decreases the particles size of V(C,N) precipitates. Also, under the same level of vanadium content, the tensile strength and yield strength of the nitrogen-enhanced steels increases consistently compared to the steels added 80% Ferro-Vanadium. An empirical formula, correlating the mechanical properties of the steel and its composition, was obtained.
机译：为了改善含钒低碳钢的强度性能，通常将氮添加到液态钢中。氮的添加源可以为多种不同形式。由于氮在钢中的低溶解度，因此从添加物中回收的氮是可变的。在这项工作中，在露天气氛下添加了富氮合金（Nitrovan）。为了推断氮的作用，选择了两种钒含量相同的合金。其中之一是钒铁作为钒的来源，而硝基钒用作钒和氮的来源。使用100 Kg感应炉将碳钢完全熔化并适当过热后，将铁钒和硝基钒分别添加到钢包中。研究了添加富氮合金对钢力学性能的影响。为此，产生了四个热量，并将其浇铸到砂模中。结果的总体趋势表明，通过增加氮含量可以提高机械性能。实验工作表明，增加的氮含量可促进V（C，N）沉淀并降低V（C，N）沉淀的粒径。同样，在相同的钒含量水平下，与添加了80％钒铁的钢相比，氮增强钢的拉伸强度和屈服强度持续提高。获得了将钢的机械性能与其成分相关联的经验公式。

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