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一、前言所谓真空热处理,乃是工件放在压力为10~(-1)~10~(-3)毫米Hg(乇)程度的中真空,或10~(-3)毫米Hg(乇)以下的高真空中加热,然后在400(乇)左右的低压惰性气体中,
I. Preface The so-called vacuum heat treatment means that the workpiece is placed in a medium vacuum at a pressure of 10 -1 to 10 -3 millimeters Hg torr or below 10 -3 mm Hg Torr, Heated in a high vacuum, and then, in a low-pressure inert gas of about 400 (Torr)