在-100～-196℃(液氮)处理淬火零件的方法,适用于W18Cr4V,在其后回火(550℃×1小时)一次即行,不必要原来的2～3次重复回火操作。因此,这是缩短回火时间节省能量的处理。此法处理比通常处理的零件硬度稍高,耐磨性可提高40％。因回火时,碳化物微粒析出少,基体中固溶的碳量多。深冷处理法不 The method for treating quenched parts at -100 to -196 ° C (liquid nitrogen) is suitable for W18Cr4V, followed by tempering (550 ° C for 1 hour) at once, without the need for the original 2 to 3 repeated tempering operations. Therefore, this is a shortened tempering time to save energy. This method is slightly harder than normal processing parts, wear resistance can be increased by 40%. Due to tempering, less precipitation of carbide particles, matrix solid solution of more carbon. Cryogenic treatment method is not