Low-cost MIM manufacturing process for high-nitrogen and non-magnetic high-strength stainless steel part

The invention discloses a low-cost MIM manufacturing process for a high-nitrogen and non-magnetic high-strength stainless steel part. The low-cost MIM manufacturing process comprises the steps of rawmaterial preparation, forming, degreasing, sintering and solid solution; in the step of sintering, a billet after catalytic degreasing is sintered to be dense by adopting a vacuum batch furnace, the sintering process is conducted under the whole-process nitrogen atmosphere, and the nitrogen atmosphere sintering is mainly carried out in two steps of the first low pressure sintering for being denseand the second high-pressure nitriding for ensuring the performance; and the low-pressure sintered nitrogen pressure is 10-30 kpa, the intake flow is 20-50 L/min, the sintering temperature is 1150-1250 DEG C, the heat insulation time is 90-360 min, the high-pressure nitriding nitrogen pressure is 60-90 kpa, the intake flow is 20-50 L/min, the sintering temperature is 1280-1320 DEG C, and the heatinsulation time is 90-120 m