POWDER METALLURGY METHOD FOR PRODUCING AN EXTRUDED PROFILE
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United States of America Patent
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Issued Date -
Jul 22, 2010
app pub date -
Jul 4, 2008
filing date -
Jul 13, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention relates to a method for producing a profile by extruding powdered metal and/or powdered metal alloys. According to said method, a powder feedstock is heated to an extrusion temperature below the melting temperature of the powder and is expelled under pressure through an opening in a die to form the section. At least one metal or a metal alloy of the powder is a reactive metal that spontaneously forms a natural oxide layer on a free surface and/or the powder contains fibre-type particles that are distributed homogeneously in the powder feedstock and that absorb microwave radiation. The powder feedstock is heated to an extrusion temperature by microwave irradiation. The method permits rapid, uniform heating in all regions of the powder feedstock.
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