Method for manufacturing sintered member

Abstract

A method for manufacturing a sintered member includes a step of preparing a raw material powder containing an iron-based powder; a step of forming a green compact having a relative density of 97% or more and having a solid cylindrical shape or hollow cylindrical shape by compacting the raw material powder; and a step of sintering the green compact. The raw material powder contains at least one of a mixed powder containing pure iron powder and Ni powder and an iron alloy powder containing Ni as an additive element. The total amount of the Ni powder and Ni serving as the additive element in the raw material powder is 1 mass % or more.

1 . A method for manufacturing a sintered member, the method comprising:
 a step of preparing a raw material powder containing an iron-based powder;   a step of forming a green compact having a relative density of 97% or more and having a solid cylindrical shape or hollow cylindrical shape by compacting the raw material powder; and   a step of sintering the green compact,   wherein the raw material powder contains at least one of a mixed powder containing pure iron powder and Ni powder and an iron alloy powder containing Ni as an additive element, and   a total amount of the Ni powder and Ni serving as the additive element in the raw material powder is 1 mass % or more.   
     
     
         2 . The method for manufacturing a sintered member according to  claim 1 , further comprising a step of cutting the green compact between the forming step and the sintering step. 
     
     
         3 . A method for manufacturing a sintered member, the method comprising:
 a step of preparing a raw material powder containing an iron-based powder;   a step of forming a green compact having a relative density of 97% or more and having a solid cylindrical shape or hollow cylindrical shape by compacting the raw material powder; and   a step of sintering the green compact,   wherein the raw material powder contains at least one of a mixed powder containing pure iron powder and Ni powder and an iron alloy powder containing Ni as an additive element,   a total amount of the Ni powder and Ni serving as the additive element in the raw material powder is 1 mass % or more,   the iron alloy powder containing at least one selected from Cu, Sn, Cr, Mo, Mn, and C, and   a total amount of powders of Cu, Sn, Cr, Mn, and Mo selected from the above alloying elements is 0.1 mass % or more and 2.0 mass % or less relative to 100 mass % of the raw material powder.   
     
     
         4 . The method for manufacturing a sintered member according to  claim 3 , further comprising a step of cutting the green compact between the forming step and the sintering step. 
     
     
         5 . The method for manufacturing a sintered member according to  claim 3 , wherein the iron alloy powder containing C powder, and
 a total amount of powders of C powder is 0.1 mass % or more and 2.0 mass % or less relative to 100 mass % of the raw material powder.