Method of making powder metallurgical compositions

Details Method of making powder metallurgical compositions Method of making powder metallurgical compositions

1999-05-26

2000-05-30

Mai, Ngoclan

Powder metallurgy processes

Forming articles by uniting randomly associated metal particles

Consolidation of powders

419 65, 75255, 75230, 75246, B22F 302

Patent

active

060688130

ABSTRACT:
The present invention provides a method of making metallurgical powder compositions and a method of using the metallurgical powder compositions produced. The method of the present invention includes providing a prealloy powder containing iron and one or more alloying additives that is preferably molybdenum, and admixing the iron-based prealloy powder with a copper containing powder having a weight average particle size of 60 microns or less, and a nickel containing powder having a weight average particle size of 20 microns. The mixture containing the iron-based prealloy powder, copper containing powder, and nickel containing powder is bonded in some manner to facilitate adhesion of the prealloy powder with the other alloying powders. Preferably, a binding agent is used to effect bonding. The metallurgical powder compositions thus produced have, for example, improved mechanical strength properties when formed into metal parts.

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