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刀具的深冷回火最近兴起的刀具深冷回火处理具有诱人的前景，它能提高生产率，降低成本，使刀具寿命延长２～４倍。深冷回火是将刀具在以液氮作为冷却剂的特制容器中在一１８４Ｃ下放置数小时。该工艺可作为通常的热／冷回火的补充手段，促使材料发生冶金变化。１９６５年...
Cryogenic tempering of tools The recent rise of tool cryogenic tempering has the attractive prospect of increasing productivity and reducing costs, extending tool life by two to four times. Cryogenic tempering is carried out in a special container with liquid nitrogen as a coolant at a pressure of 184C for several hours. The process can be used as a normal hot / cold tempering supplemental means to promote metallurgical changes in the material. 1965 ...