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在清洁钢中低倍夹杂非常少,然而就是这少量低倍夹杂的存在对最终钢成品的材料性能却是极其有害的。至今,有关清洁钢中大的所谓的低倍夹杂的资料介绍几乎没有。因此,本研究关注的是根据在瑞典哈格福尔斯(Hagfors)的乌德霍尔姆工具厂(Uddeholm Tooling),进行的生产试验提供这些夹杂在炼钢过程不同阶段的情况。用光学显微镜以及浸入式超声波扫描对低倍夹杂的尺寸分布进行了测定,并按照瑞典标准SS111116的修订版进行了分级。为了完整起见,用光学显微镜也对高倍夹杂的尺寸分布进行了测定。用一个装有能量扩散分光镜(EDS)的扫描式电子显微镜(SEM)来确定夹杂物的成分。在研究过程中使用了两种类型的钢水取样器:快速凝固(RS)取样器和适于浸入式超声波扫描的钢液取样热轧(LSHR)取样器。主要根据工艺条件(储如在工厂试验过程中进行的合金添加)对结果进行讨论。
In the clean steel, low-frequency inclusions are very small, however, the presence of this small amount of low-order inclusions is extremely detrimental to the material properties of the final steel product. To date, there has been almost no introduction on the so-called low magnification inclusions in clean steel. Therefore, the present study focuses on the production trials conducted at Uddeholm Tooling in Hagfors, Sweden, to provide these inclusions at different stages of the steelmaking process. The size distribution of low magnification inclusions was determined by light microscopy and immersion sonography and was graded according to a revision of the Swedish standard SS111116. For the sake of completeness, the size distribution of high magnification inclusions was also measured with a light microscope. The composition of the inclusions was determined using a scanning electron microscope (SEM) equipped with an energy dispersive spectroscope (EDS). Two types of molten steel samplers were used in the study: rapid solidification (RS) samplers and molten steel sampling hot rolling (LSHR) samplers for immersion ultrasonic scanning. The results are mainly discussed based on the process conditions (such as alloy addition during the factory test).