Production method of low-oxygen stainless steel powder for injection molding

The invention belongs to the technical field of powder metallurgy atomization powder preparation, discloses a production method of low-oxygen stainless steel powder for injection molding. The problem of high oxygen content in stainless steel powder in the prior art is solved. Strong reducing agent hydrazine hydrate is added in an existing pure water tank, oxygen dissolved in water can be removed, oxidation reaction between high-temperature metal melt and water vapor during atomization can be inhibited, protective agents stearic acid and methylbenzotriazole are added into a powder collecting tank, and reduced metal can be prevented from being oxidized and agglomerated in water. In the nitrogen filter-pressing process, nitrogen protection and organic protection are achieved, internal energy increase and temperature rise of nitrogen in the filter-pressing process is prevented, oxygen in the nitrogen oxidizes powder, the low oxygen content of the powder is guaranteed, meanwhile, a protective agent plays a dispers