在分析传热机理的基础上，研制了一种采用半导体致冷的、床温低于室温的淬火流态床；系统研究了－３０℃流态床的综合淬火效果。结果表明，该流态床的冷却能力较室温流态床提高２０％以上，工件淬火后具有力学性能优，变形和开裂倾向小，组织和尺寸稳定性高等特点，具有工程应用价值。 Based on the analysis of the heat transfer mechanism, a quenched fluidized bed with semiconductor cooling and room temperature below room temperature was developed. The comprehensive quenching effect of the fluidized bed at -30 ℃ was systematically studied. The results show that the cooling capacity of the fluidized bed is more than 20% higher than that of the fluidized bed at room temperature. It has the advantages of good mechanical properties after quenching, low deformation and cracking tendency, high structure and dimensional stability, and has the engineering application value.