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钢锭和连铸坯中的夹杂物,尤其是这些产品中大于50μm的大颗粒夹杂,虽然含量占整个夹杂总量1％(体积分数),但对成品材的危害最为严重,它直接影响成材率和产品性能。 大样电解是用于分析钢中大于50μm的非金属氧化物夹杂的一种重要方法。它的特点是:(1)采用的试样3～5公斤,便于捕集到大颗粒夹杂,试样代表性强。(2)采用物理方法分离夹杂物和碳化物,便于保存夹杂物的形态。(3)对夹杂物能进行定性,定量分析和粒度大小分级。这种方法适于研究钢在冶炼、浇注和凝固过程中夹杂物的行为和起源,以提供在工艺上改善钢的纯净度的方向。 它的主要技术特点是:本方法是由电解、淘洗、还原、磁选和粒度分级等步骤组成。 (1)电解试样尺寸为φ55×160mm,重3—5公斤。 (2)电解液为FeSO_4·7H_2O+FeCl_2+ZnCl_2。电解过程中具有pH值稳定的优点,电解液成本低。
Inclusions in steel slabs and slabs, especially large inclusions larger than 50 μm in these products, are most harmful to the finished product, although they account for 1% (volume fraction) of the total amount of inclusions, which directly affects the yield And product performance. Large-scale electrolysis is an important method for analyzing non-metallic oxide inclusions greater than 50 μm in steel. Its features are: (1) the sample used 3 to 5 kg, easy to capture large particles mixed, representative of the sample. (2) The physical method of separating inclusions and carbides, easy to preserve the morphology of inclusions. (3) The inclusions can be qualitative, quantitative analysis and particle size classification. This method is suitable for studying the behavior and origin of inclusions in steel during smelting, casting and solidification in order to provide a process direction to improve the purity of the steel. Its main technical features are: This method is composed of electrolysis, panning, reduction, magnetic separation and particle size grading steps. (1) electrolytic sample size is φ55 × 160mm, weight 3-5 kg. (2) The electrolyte is FeSO 4 · 7H 2 O + FeCl 2 + ZnCl 2. Electrolysis process has the advantages of pH stability, low cost electrolyte.