论文部分内容阅读
洁净钢中宏观夹杂物的含量非常少 ,但少量的宏观夹杂也会严重影响最终钢材的性能。有关这方面的资料很少 ,目前的研究主要是根据瑞典UddeholmTooling ,Hagfors的工业性试验 ,分析这些夹杂物在炼钢过程不同阶段的行为。利用光学显微镜测定了宏观夹杂物的尺寸分布 ,依照修正后的瑞典标准SS111116并应用浸没式超声波扫描结果对其进行了分类。为了完整地描述洁净钢中夹杂物的行为 ,还利用光学显微镜测定了钢中微观夹杂的尺寸分布 ,使用配有能量扩散光谱 (EDS)的扫描电镜 (SEM)测定了夹杂物的成分。研究中使用了两种不同的钢水取样器 ,一种是快速凝固取样器 (RS) ,另一种是适于浸没式超声扫描的LSHR取样器(液体采样热轧式 ) ,结合试验时的生产工艺条件 ,例如添加过合金等 ,严密地讨论了试验结果。
The content of macroscopic inclusions in clean steel is very small, but a small amount of macroscopic inclusions will seriously affect the properties of the final steel. Little information is available on this subject. The present study mainly analyzes the behavior of these inclusions at different stages of the steelmaking process based on industrial tests conducted by Uddeholm Tooling and Hagfors in Sweden. The size distribution of macroscopic inclusions was measured by light microscopy and classified according to the revised Swedish standard SS111116 and using the results of immersion sonography. In order to completely describe the behavior of inclusions in clean steel, the size distribution of microscopic inclusions in steel was also measured by light microscopy. The composition of inclusions was determined by scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS). Two different samples of molten steel were used in the study. One was the Rapid Solidification Sampler (RS) and the other was a LSHR sampler (liquid sampling hot rolling) for immersion sonography, in combination with the production of the test The process conditions, such as the addition of alloys, etc., are discussed closely.