Firstly, when the molten steel flows through the casting hole, the temperature suddenly rises, and radioactive thermal vibration cracks are generated around the casting hole.
Secondly, the cast hole is first subjected to thermal shock and expansion. The change in position is slightly smaller. When the thermal conductivity is small and the temperature gradient is large, a large thermal stress is generated at a certain distance from the casting hole of the sliding plate to cause cracks.
Thirdly, ladle slide plate is a non-homogeneous material, especially a composite ladle slide plate. It is easy to cause cracks due to different expansion coefficients.
At last, mechanical constraints. The slide is heated by the heat, if there is no gap or gap between the two ends of the sliding box and the slide, it will be restricted by the side wall of the sliding box when the board expands. And the sliding plate is a brittle material, and excess crushing strength leads to crack.
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Article Source: ladle slide plate
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