Manufacture of light weight pistons
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United States of America Patent
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Dec 28, 1982
Issued Date -
N/A
app pub date -
Sep 15, 1980
filing date -
Jul 12, 1978
priority date (Note) -
Expired
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Abstract
A method of manufacture of novel light-weight pistons of aluminum forgings with an integral iron insert ring by fusion welding is described. The aluminum piston forging is provided with a configuration adapted to receive the iron insert ring which may be coated to provide an inter-metallic joining alloy. The configured piston forging is placed in a mold, the ring is positioned in the configuration. The mold is rotated and molten alloy is introduced at an angle to deoxidize the forging and the ring, sweep the oxides to non-critical areas of the mold and to join the forging to the ring upon cooling to form a fusion weld.
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