镀锡板基板钢铸坯夹杂物的检测与表征

镀锡板产品轧制厚度薄,用于包装的镀锡板需严格把控质量以避免缺陷的产生,故探究用于生产镀锡板所用基板钢铸坯的夹杂物的成分、形貌、尺寸、数量分布规律尤为必要。采用高频水浸超声检测技术对镀锡板基板钢铸坯中夹杂物的尺寸、数量分布进行了检验分析,并结合大样电解、扫描电镜分析方法对镀锡板基板钢铸坯中的夹杂物进行了成分、种类、形貌分析。结果表明,在铸坯内弧1/4处和外弧处有明显的夹杂聚集区,整体范围内夹杂物的数密度为6.25×10^(2)个/m^(3),局部夹杂物的数密度为3.33×10^(9)个/m^(3);大型夹杂物的主要组成为Al_(2)O_(3)及少量SiO_(2)、CaO等夹杂物,此外还发现含有K2O的大型夹杂物。

Detection and characterization of inclusions in tinplate base steel slabs

Due to the thin rolling thickness of tinplate products, the quality of tinplate used for packaging must be strictly controlled and must not have defects. Therefore, it is particularly necessary to explore the composition, morphology, size, and quantity distribution of the inclusions in the tinplate cast slab. The size and quantity distribution of inclusions in the tin-plated substrate steel casting slab were inspected and analyzed by using high-frequency water-immersion ultrasonic testing technology, and the composition, types and morphology of inclusions in the tin-plated substrate steel casting slab were analyzed by combining scanning electron microscope and slime method.The results show that there are obvious inclusions at 1/4 of the inner arc and the outer arc of the cast slab. The number density of inclusions in the whole range is 6.25×102 m-3, and the number density of local inclusions is 3.33×109 m-3; the main composition of large inclusions is Al₂O₃, and there are a small amount of inclusions such as SiO₂ and CaO in the cast slab. In addition, large inclusions containing K₂O are also found.