Study of Micro-Inclusion of Grade 45 Steel

Abstract:

According to the production process of grade 45 steel(120tBOF→slag refining→ CC), some system analysis are introduced to research on the type composition and quantity of micro-inclusions, and the effect of slag washing production process on the cleanliness of casting slab is evaluated. The results of the study show that: The content of T[O] is 48.75ppm in normal slab, The content of T[O] is 56.2ppm in head slab, The content of T[O] is 49.2ppm in compound casting slab.The main types of micro-inclusion in slab are MnS inclusion and Al2O3 inclusion. The quality of micro-inclusions is 14.32/mm2 in the normal slab, the quality of micro-inclusions is 17.68 /mm2 in the head slab, the quality of micro-inclusions is 27.94 /mm2 in the compound casting. In the normal slab, the average total volume ratio of micro-inclusions is 0.0458%. The particle size of micro-inclusions is smaller. The particle size of less than 10μm in micro-inclusions is the largest and is about 80%.

• Periodical: Advanced Materials Research (Volumes 634-638)
• Pages: 1869-1873
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.634-638.1869
• Online since: January 2013
• Authors: Bu Qing Xiao, Sheng Fu Li, Xiao Tao Tian, Jian Xing Wang
• Keywords: Grade 45 Steel, Micro-Inclusion, Slag Washing Process, Unsteady Casting

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