Process for forming composite piston

Details Process for forming composite piston Process for forming composite piston

1998-04-16

1999-11-30

Cuda, I

Metal working

Method of mechanical manufacture

Prime mover or fluid pump making

29888044, B23P 1500

Patent

active

059920157

ABSTRACT:
In a method of manufacturing the piston, a first block including first alloy and a second block including a second alloy are press-forged to form a piston. The piston has a head and a skirt, with the head including at least a portion of the first alloy and the skirt including at least a portion of the second alloy. The first alloy preferably including an aluminum-iron based alloy, and the second alloy preferably comprises an aluminum-silicon based alloy. Preferably, during the forging process an interface between the blocks is increased in length or area, whereby oxide layers on the blocks are destroyed and the material comprising the two alloys is bonded directly.

REFERENCES:
patent: 2707136 (1955-04-01), Fahlman
patent: 4434014 (1984-02-01), Smith
patent: 4440069 (1984-04-01), Holtzberg et al.
patent: 5065508 (1991-11-01), Lorento et al.
patent: 5170556 (1992-12-01), Kamimura et al.
patent: 5245752 (1993-09-01), Lippai et al.
patent: 5259294 (1993-11-01), May

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