| 摘要 |
A method for forming a copper-infiltrated iron powder metal article comprises compacting and sintering a predominately iron powder to form an iron-base matrix that contains between about 1 and 7 weight percent nickel and about 0.1 and 1.2 weight percent phosphorus. A copper metal is infiltrated into pores within the iron-base matrix. The product article comprises between about 2.0 and 23 weight percent copper infiltrant. Preferably, infiltration is carried out concurrently with sintering of the iron powder compact. The resulting product exhibits a particularly useful combination of mechanical properties, including high tensile strength and elongation.
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