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Controlled Cooling
- Dec 07, 2018 -

Controlled cooling, also known as accelerated cooling, rapidly lowers the temperature of the plate to the end of the crystal transition. In order to avoid bending of the steel plate during cooling, the cooling speed of the whole steel plate surface must be consistent. Cooling systems (called on-line quenching systems) at the exit of some mills have replaced off-line tempering and tempering heat treatment systems, which are often used to produce ultra-high strength steel plates. Whether accelerated cooling is applied or not, the steel plate will eventually be transported to the cold bed for air cooling. In special cases, steel plates can be stacked to reduce the cooling rate. This can make the steel plate hydrogen emission, thereby reducing the use of steel plate hydrogen embrittlement.