High-temperature liquid-phase sintered alloy powder of iron-based parts in powder metallurgy and manufacturing method

The invention belongs to the technical field of powder metallurgy, and relates to additive powder suitable for high-temperature liquid-phase sintering of iron-based parts in powder metallurgy and a manufacturing method. The alloy powder comprises the following components: 0.15-0.30 parts of C, 15-22 parts of Si, less than part of Cr, less than 0.5 part of Mn, less than 0.3 part of P, less than 0.5 part of acid insoluble substances, less than 2000 ppm of reducible oxygen (O), less than 1.00 part of inevitable process impurities, and the balance of Fe. The alloy powder is manufactured by adopting a water atomization method or a water-gas combined atomization method. When the powder is added, the density of a vacuum high-temperature sintered eutectoid steel sample is increased to 7.30 g/cm < 3 > from 6.7 g/cm < 3 >, for the Fe-Mn-Si-Cr-C series, Ni and Mo are not added, the sintering-state hardness reaches Rockwell hardness HRC40, and the same sintering hardening effect is achieved. For some Fe-(10-20) Cu porous