during casting, it is important to have the body-centre-line of the SES aligns with the body-centre-line of the mould. if this alignment is not ensured and the SES stays close to one of the four sides of the mould, then it is likely to discharge fresh metal much closure to that side of the mould.
closer position of the discharge point of SES takes a longer distance to develop the necessary shell-thickness to develop sufficient shell thickness, thereby sufficient strength to withstand the ferrostatic pressure of the liquid steel above it at any given point of the strand from meniscus.
closer side may have thinner than normal shell thickness while the far side may have thicker than normal thickness. thinner shell may not strong enough to withstand ferrostatic pressure and thicker shell may develop extra strain, thereby chances for breakout are enhanced due to misalignment.
closer position of the discharge point of SES takes a longer distance to develop the necessary shell-thickness to develop sufficient shell thickness, thereby sufficient strength to withstand the ferrostatic pressure of the liquid steel above it at any given point of the strand from meniscus.
closer side may have thinner than normal shell thickness while the far side may have thicker than normal thickness. thinner shell may not strong enough to withstand ferrostatic pressure and thicker shell may develop extra strain, thereby chances for breakout are enhanced due to misalignment.
this pic above shows an improperly aligned SES in mould during casting. it becomes the responsibility of the mould operator to correct it by CT movement of tundish which is done through hydraulic cylinders in tundish cars.
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