METHOD FOR PRODUCING Diffusion-alloyed powder iron or iron-based powder, the diffusion-alloy powder, a composition comprising Diffusion-alloy powder, and pressed and sintered parts made of said composition

摘要

FIELD: process engineering.;SUBSTANCE: invention relates to powder metallurgy, particularly, to iron-based composition and to production of diffusion-alloyed powder. Said diffusion-alloyed powder is produced by mixing iron powder or iron-based powder with alloying powder particles containing copper and nickel and heating produced mix in nonoxidising or reducing medium to 500-1000°C for 10-120 minutes for bonding of alloying powder particles with base powder surface. Granulometric composition of alloying powder particles of copper and nickel is such that D₅₀ makes less than 15 mcm. Total content of copper and nickel makes at least 20 wt % at copper content over 4 wt % and Cu:Ni varying from 9/1 to 3/1.;EFFECT: sintered parts feature minimum size variation during sintering.;15 cl, 3 dwg, 6 tbl, 2 ex