Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Post sintering operation
Patent
1986-10-22
1989-08-01
Lechert, Jr., Stephen J.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Post sintering operation
419 33, 419 41, 419 52, 419 67, B22F 324
Patent
active
048531790
ABSTRACT:
This invention relates to a method of manufacturing a structural member made of a sintered Al alloy having heat resistance and high strength. A powder is used having a composition which makes it difficult to perform hot forging, i.e. 8.0 to 30.0 wt. % of Si, 0.8 to 7.5 wt. % of Cu, 0.3 to 3.5 wt. % of Mg, 2.0 to 10.0 wt. % of Fe, 0.5 to 5.0 wt. % of Mn, and a balance of Al. After being subjected to press-forming, this Al alloy powder is subjected to hot extrusion at a temperature of 300.degree. to 450.degree. C., the extruded product is heated with electric resistance heating by electric current which is passed therethrough and subjected to forging at a temperature of 300.degree. to 495.degree. C. According to this method, a structural member made of a sintered Al alloy having heat resistance and high strength and having the aforementioned powder composition can be easily obtained without cracking.
REFERENCES:
patent: 4335494 (1982-06-01), Lemelson
patent: 4380473 (1983-04-01), Lichtinghagen
patent: 4435213 (1984-03-01), Hildeman et al.
patent: 4702885 (1987-10-01), Odani et al.
Honda Giken Kogyo Kabushiki Kaisha
Lechert Jr. Stephen J.
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