High-performance PM steels utilizing extra-fine nickel

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Journal titleInternational Journal of Powder Metallurgy
Pages3949; # of pages: 11
AbstractDistribution of the alloying additives in powder metallurgy (PM) steels is a key element in achieving optimum sintered properties. Segregation must be avoided in order to ensure consistent part-to-part properties. Recent studies indicate that extra-fine nickel powders have a beneficial impact on the overall properties of nickel-copper-carbon PM steels. Therefore, the use of extra-fine nickel powder in segregation-free PM mixes could be an efficient way to optimize properties. To this end, the effect of the size and size distribution of two nickel powders on the physical and mechanical properties of two binder-treated steel powder premixes processed on a polit scale has been assessed. The properties of these two mixes are compared with those of a diffusion-alloyed mix of the same composition. Mechanical properties and dimensional change of the binder-treated mixes are shown to be superior to those of the diffusion-alloyed mix. The physical and sintered properties of the binder-treated mixes can be further improved by using extra-fine nickel powder (D₅₀ 1.5µm) instead of a standard size (D₅₀ 8µm) nickel powder.
Publication date
AffiliationNational Research Council Canada; NRC Industrial Materials Institute
Peer reviewedYes
NRC number52425
NPARC number13958433
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Record identifier942aa012-f925-4491-8089-1d951cc74c8f
Record created2009-12-18
Record modified2016-05-09
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