Keywords: quenching, cooling, workpiece, Quenching Method, Fluidized Bed,

The application of fluidized bed quenching is also increasingly widespread. Because of its adjustable cooling rate (equivalent to the cooling capacity of air to oil), and does not form a vapor film on the surface. Therefore, the workpiece is cooled uniformly and the deflection deformation is small. Since the cooling rate can be adjusted in a range corresponding to air cooling to oil cooling, a program-controlled cooling process can be realized. It can replace the interruption of quenching, grading quenching and other procedures to deal with complex shape, deformation requirements of the important parts and work, mold.
 Rapid Quenching Method in Fluidized Bed
 1 method for rapidly quenching products in a fluidized bed is introduced, in which a bed composed of particles with a certain particle type and size is fluidized with a certain flow rate of highly conductive gas.
 A method of heat treating a steel alloy product, including:(a) providing an austenitizing temperature of the steel alloy product, (B) fluidizing a bed composed of fine solid particles with a highly conductive gas, The flow rate of the highly conductive gas is at least 1.5 times the minimum flow (state) flow rate,(c) immersing the article in the above-mentioned fluidized bed at a bed temperature below the M & darr; [s] temperature of the alloy,(d) quenching the article in the bed for a period of time and at a rate sufficient to reach the Ms temperature of the alloy without the formation of substantially undesirable softer phases in the article, on the other hand, at least a portion of the quench stage is performed by fluidizing the bed with a highly conductive gas and maintaining the bed at a temperature below the M & darr; [s] temperature of the alloy throughout the quench.

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