Stock material or miscellaneous articles – All metal or with adjacent metals – Having metal particles
Patent
1992-08-31
1994-10-04
Walsh, Donald P.
Stock material or miscellaneous articles
All metal or with adjacent metals
Having metal particles
428546, 428551, 428552, 428564, 419 5, 419 8, 419 10, 419 13, 419 47, B22F 704
Patent
active
053525388
ABSTRACT:
A surface hardened aluminum part having excellent heat resistance and abrasion resistance obtained by forming, on the surface of an aluminum base material, an alloy layer that has a uniform composition and uniform hardness, being free from cracks. An aluminum alloy powder made of aluminum and metals each of which forms an intermetallic compound of high hardness with aluminum is prepared. This aluminum alloy powder is supplied onto the aluminum base material and the aluminum or aluminum alloy contained in the aluminum base material is alloyed with the aluminum alloy powder using a high-density energy heat source to form an alloy layer. The alloy layer thus formed has an intermetallic compound of high hardness uniformly distributed throughout the layer so that the hardness of the alloy layer is uniform and cracking is unlikely to occur.
REFERENCES:
patent: 4008051 (1977-02-01), Cadle
patent: 4401726 (1983-08-01), Gnanamuthu
patent: 4725708 (1988-02-01), Kawasaki et al.
patent: 4902359 (1990-02-01), Takeuchi
patent: 4942804 (1990-07-01), Matsuura
patent: 5093207 (1992-03-01), Hodes
Adachi Kaoru
Takeda Toshihide
Greaves John N.
Komatsu Ltd.
Walsh Donald P.
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