Cold additive and hot forging combined forming method of amorphous alloy parts

A cold additive and hot forging combined forming method of an amorphous alloy part, comprising:

• (1) making amorphous alloy powder into a pre-forging blank by micro-jetting and bonding 3D printing, comprising:
• laying powder first, and then spraying binder to form a bonding layer, and
• repeating the operations of powder laying and binder spraying until a three-dimensional pre-forging blank is printed;
• and
• (2) placing the pre-forging blank in the step (1) in a closed forging die to perform hot closed-die forging so as to obtain the amorphous alloy part, the amorphous alloy part having a thickness of greater than 80 mm,
• wherein a contour size and shape of the pre-forging blank are designed according to a contour size and shape of an inner cavity of the closed forging die,
• an exhaust hole is provided in the closed forging die such that gas generated by gasification or decomposition of the binder at a hot die forging temperature is discharged through the exhaust hole in the closed forging die, the hot die forging temperature being between a glass transition temperature Tg and an initial crystallization temperature Tx of the amorphous alloy powder, and
• a hot die forging time is shorter than a crystallization starting time of the amorphous alloy powder at the hot die forging temperature, the hot die forging time being a majority of the crystallization starting time of the amorphous alloy powder at the hot die forging temperature and less than 8 minutes.