JP2012087416A5 - - Google Patents

Claims (9)

Zr, Si, and C (carbon) are included so as to satisfy the following conditions (A), (B), and (C), and the balance is 0.21% by mass or more and 0.26% by mass or less. A metal powder for powder metallurgy comprising a metal material containing Mo and at least one selected from the group consisting of Fe, Co, and Ni.
(A) When the Zr content is a [mass%], the Si content is b [mass%], and the C content is c [mass%] , a / b is 0.03 or more. 0.3 or less and c / b is 0.001 or more and 3 or less (B) b is 0.5 mass% or more and 0.8 mass% or less .
(C) c is 0.1 mass% or more and 0.7 mass% or less   2. The metal powder for powder metallurgy according to claim 1, wherein the content a of Zr is 0.015 mass% or more and 0.3 mass% or less. The metal material includes Fe, and
a is 0.03 mass% or more and 0.1 mass% or less, and
b is 0.5 mass% or more and 0.8 mass% or less, and
The metal powder for powder metallurgy according to claim 1 or 2 , wherein c is 0.1 mass% or more and 0.7 mass% or less. The metal powder for powder metallurgy according to any one of claims 1 to 3 , wherein the metal material has a composition in which an atomic arrangement is a face-centered cubic lattice at a sintering temperature. The metal powder for powder metallurgy according to any one of claims 1 to 4 , wherein the metal material and the Zr and Si form an alloy or an intermetallic compound. The metal powder for powder metallurgy according to any one of claims 1 to 5 , having an average particle size of 1 µm to 30 µm. The metal powder for powder metallurgy according to any one of claims 1 to 6 , wherein the metal powder for powder metallurgy is manufactured by an atomizing method. A sintered body obtained by molding the metal powder for powder metallurgy according to any one of claims 1 to 7 into a predetermined shape and sintering the obtained molded body. The sintered body according to claim 8 , wherein the relative density is 96% or more.