Heat treatment of steel elements in fluidized beds

Details Heat treatment of steel elements in fluidized beds Heat treatment of steel elements in fluidized beds

C - Chemistry, Metallurgy

21

D

38/19, 148/36.2

C21D 9/567 (2006.01) C21D 9/573 (2006.01) C21D 9/64 (2006.01)

Patent

CA 1270427

Abstract In the heat treatment of steel wires in a patenting operation, the wires from an austenitizing furnace are first quenched in a fluidized bed. This bed is fluidized by hot gases from the furnace and is also provided with a cooling system. The wires are then passed into a second fluidized bed (TR-S) where transformation takes place. This bed is fluidized by an independent source of hot gas and is divided into regions along its length which have independently controllable auxiliary heaters. The temperatures in the zone and the region along zone (TR-S) are controlled to give a fine pearlite microstructure in the wire.

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