Abstracts: IN LAXCON STEEL LTD a scrap metal are melted in high temperature furnace, a temperature near about 1500°c to 1600°c.After this melted metal bring out to Continuous Casting Machine through ladder ,then this mould of metal poured into tundish car machine. There are stages in machine like approl, intermediate section, withdrawal, auto cutter machine. But quality problems such as Cracks, Rhomboidity, Porosity, Lapping, seems Crack, Piping, Centre Looseness, Ovality, Blow holes, Pin holes and Breakouts are often observed in continuously cast steel billets. These defects create a problem in metal which is cast. On the one hand fundamental knowledge about heat transfer, solidification and mechanical behavior of steel was applied to identify the origin of a quality problem in the process. We finally study about Cracks and effect of cracks and also find solution to reduce Transverse cracks.
IN LAXCON STEEL LTD A scrap metal is melted in the high temperature furnace, a temperature near 1500'ca 1600'c.After this molten metal pulls the continuous casting machine through the scale, then this mold of metal poured into the spoon car machine. There are stages in machine such as approl, intermediate section, withdrawal, automatic cutting machine. However, quality problems like Cracks, Rhomboidity, Porosity, Lapping, Crack, Pipe, Looseness Center, Ovality, Blow Holes, Pin Holes and Breakouts are often observed in continuously cast ingots.
These defects create a problem in the metal that is cast. On the one hand, fundamental knowledge was applied on heat transfer, solidification and mechanical behavior of the steel to identify the origin of a quality problem in the process.
This review examines the different types of internal and surface cracks that may form during continuous casting of steel. For each type of crack, the operational and metallurgical factors known to influence cracking are evaluated in light of the high temperature mechanical properties of the steel and the knowledge of the stresses generated in the solidifying layer. This approach demonstrates the importance of two areas of low ductility in steel. An area exists above 1340 ° C and probably represents the formation of all internal cracks and longitudinal surface cracks. The other zone is between 700 and 900 ° C and is related to the presence of soluble aluminum, niobium and vanadium. The transverse surface cracks in the slabs may be related to the last zone.