The invention relates to
phosphorus-containing mixed
iron powder for automobiles. The
phosphorus-containing mixed
iron powder is prepared from the following chemical components in percentage by weight: 0.001 percent to 0.2 percent of C, 0 percent to 0.50 percent of Si, 0.1 percent to 1.0 percent of Mn, 0.1 percent to 1.0 percent of P, 0 percent to 0.050 percent of S and the balance of Fe and inevitable impurities, wherein the loose packed density is 3.10g / cm<3> to 3.20g / cm<3>, the
compressibility under the pressure of 600MPa is more than 7.05g / cm<3>, and the flowability is 32.0s / 50g to 33.8s / 50g. The
phosphorus-containing mixed
iron powder is prepared by performing
diffusion bonding on water atomized pure iron
powder with high
compressibility and ferrophosphorus
powder; the water atomizedpure iron
powder is used as basic powder, the ferrophosphorus powder is added into the water atomized pure iron powder according to requirements of the components, and then the ferrophosphorus powderand the water atomized pure iron powder are uniformly mixed and then are diffused through a reducing furnace so as to obtain powder containing ferrophosphorus powder; the powder containing ferrophosphorus powder is added into 0.1 percent by weight to 1.0 percent by weight of
lubricant, and then mixing is carried out for 20 minutes to 40 minutes to obtain a finished product. The phosphorus-containing mixed iron powder disclosed by the invention has the advantages that the using of
alloy auxiliary categories is less so that the using cost of alloys is reduced, segregation on
alloy element components is not produced in transportation and mixing processes, the stability of dimensional tolerance can be maintained in a
sintering process of the product, and an iron-based
alloy product having a uniform microscopic structure is conveniently obtained.