本发明涉及一种粉末冶金工艺制备沉淀硬化高速钢的方法，采用非真空方式进行熔炼及雾化制粉，采取多种有效保护手段，减少有害夹杂的混入，防止合金氧含量增加，制备过程氧含量增量≤30ppm，粉末固结成形后获得的锭材组织细小均匀，具备优良综合性能。采用本发明的方法单次制备工具钢锭材重量可达1.5-8吨，非真空大吨位钢包的使用降低了整体生产成本。

The invention relates to a method for preparing precipitation hardening high speed steel by powder metallurgy process, which adopts non-vacuum melting and atomization to produce powder, and adopts various effective protective measures to reduce the mixing of harmful inclusions and prevent the increase of alloy oxygen content. The oxygen content increment in the preparation process is ≤ 30ppm. The ingot obtained after powder consolidation forming has fine and uniform microstructure and excellent comprehensive properties. The weight of tool steel ingot prepared by the method of the invention can reach 1.5-8 tons, and the use of non-vacuum large-tonnage ladle reduces the overall production cost.