Preparation method of powder of high-sphericity low-density steel

The invention discloses a preparation method of powder of high-sphericity low-density steel. The preparation method comprises the steps of burdening, smelting and powdering. According to the preparation method, the low-density steel with a specific raw material ratio is used as a raw material, and a vacuum melting and pouring mode is adopted during preparation of the alloy bar, so that non-metal impurities introduced in a melting stage are reduced, and the content of impurities in the alloy is further reduced; meanwhile, the PREP technology is adopted for powder preparation, powder preparation is conducted under the condition of specific technological parameters, the powder is little in hollow powder and high in sphericity degree, aftertreatment is conducted under argon protection, the phenomenon that oxygen and nitrogen are increased is further controlled, and the obtained spherical powder product is low in non-metal impurity content and high in purity. 本发明公开了一种高球形度低密度钢的粉末的制备方法，该制备方法包括配料、熔炼及制粉。上述制备方法通过以特定原料配