论文部分内容阅读
使用不同的技术手段对冶金反应引起的非金属夹杂物和连铸坯缺陷进行了分析。结果表明,连铸坯试样中夹杂物分布不均匀,夹杂物的尺寸超过了20μm。一些薄膜状的非金属夹杂物由MnS和CaS组成。薄膜状的非金属夹杂物的形成与金属的脱硫相关。大量的薄膜状的非金属夹杂物主要由MnS夹杂所包起来的镁铝尖晶石组成。这是由于液态金属在脱氧过程中A1和MgO的存在造成的。有必要对于连铸坯在浇注前进行充分的吹氩搅拌。
Metallurgical reaction caused by non-metallic inclusions and slab defects were analyzed using different techniques. The results show that the distribution of inclusions in the slab samples is not uniform and the size of inclusions exceeds 20μm. Some film-like non-metallic inclusions consist of MnS and CaS. The formation of film-like non-metallic inclusions is related to the desulfurization of the metal. A large number of film-like non-metallic inclusions mainly composed of MnS inclusions surrounded by magnesium aluminum spinel composition. This is due to the presence of A1 and MgO during the deoxidation of the liquid metal. It is necessary for the billet before pouring sufficient argon blowing.