Research on non-metallic inclusions of 20G Steel
-
摘要: 针对某钢厂在生产20G钢初期,存在表面裂纹,低倍检验不合格的问题,对其生产过程中非金属夹杂物类型、数量、来源、尺寸及分布进行了综合分析。研究表明:正常铸坯中显微夹杂物平均总体积率0.149%,连浇坯中显微夹杂物平均总体积率为0.184%;正常坯中大型夹杂物平均含量为1.81 mg/kg,连浇坯中含量为3.31 mg/kg,其夹杂物主要来源于结晶器液面保护渣,其次中包覆盖剂和钢包渣卷入也是钢水污染的一个原因。Abstract: In the early production of 20G in Steel,crack defects and macro examination unqualified.So the type,resource,amount and distribution of non-inclusions are systemically studied by the actual combination of laboratory and field research methods for the production process of 20G steel,The result shows: Volume ratio of micro-inclusion is 0.149%and 0.184% in normal and casting clab;The content of macro-inclusion in normal and casting clab is 1.81 mg/kg and 3.31 mg/kg.Inclusions are mainly derived from the mold surface with the flux,followed by Tundish complex agent and slag ladle complex.
-
Key words:
- 20G steel /
- micro-inclusion /
- macro-inclusion /
- volume rate
-
点击查看大图
计量
- 文章访问数: 17
- HTML全文浏览量: 3
- PDF下载量: 1
- 被引次数: 0
下载:
