NOVEL PROCESS FOR PRODUCING UITRA-FINE METAL POWDERS-CRYOGENIC QUENCHING

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The influence of subzero quenching and annealing on shape memory effect of FeMnSiCrNi alloy was studied.Subzero quenching and annealing treatment refined the microstructure and improved the shape memory effect of the alloy.Under the condition of subzero quenching at-50¤@¡æ and then annealing for 10 mi

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This article introduces the technical parameters,construction and characteristics of heat exchanger¡ª¡ªheart equipment for gas chilling separating process in chemical factor,and describes in detail the examination and repairing technology for leakage starting with principle and construction.