IRON-BASED SINTERED POWDER METAL FOR WEAR RESISTANT APPLICATIONS

A powder metal material comprises pre-alloyed iron-based powder including carbon present in an amount of 0.25 to 1.50% by weight of the pre-alloyed iron-based powder. Graphite is admixed in an amount of 0.25 to 1.50% by weight of the powder metal material. The admixed graphite includes particles fin...

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Bibliographische Detailangaben
Hauptverfasser:	FARTHING, LESLIE JOHN, Christopherson, JR., Denis Boyd, KOTH, JEREBY RAYMOND
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS BLASTING CASTING CHEMISTRY CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES ENGINE PLANTS IN GENERAL FERROUS OR NON-FERROUS ALLOYS HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER MECHANICAL ENGINEERING METALLURGY PERFORMING OPERATIONS POWDER METALLURGY STEAM ENGINES TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WEAPONS WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:	A powder metal material comprises pre-alloyed iron-based powder including carbon present in an amount of 0.25 to 1.50% by weight of the pre-alloyed iron-based powder. Graphite is admixed in an amount of 0.25 to 1.50% by weight of the powder metal material. The admixed graphite includes particles finer than 200 mesh in an amount greater than 90.0% by weight of the admixed graphite. Molybdenum disulfide is admixed in an amount of 0.1 to 4.0% by weight of the powder metal material, copper is admixed in an amount of 1.0 to 5.0% by weight of the powder metal material, and the material is free of phosphorous. The powder metal material is then compacted and sintered at a temperature of 1030 to 1150° C. At least 50% of the admixed graphite of the starting powder metal material remains as free graphite after sintering.