Metal treatment – Process of modifying or maintaining internal physical... – With casting or solidifying from melt
Patent
1994-06-21
1997-02-18
Simmons, David A.
Metal treatment
Process of modifying or maintaining internal physical...
With casting or solidifying from melt
148539, 148437, 164114, 164138, 164286, 164DIG3, 164DIG14, 420548, 420549, C22F 104
Patent
active
056037830
ABSTRACT:
A one-piece steering wheel is formed as a unitary casting from an alloy that includes 11.5% to 14% by weight silicon, and 350 to 450 parts per million strontium. Preferably the steering wheel mold is rotated during casting at relatively high rotational speeds exerting 100 g to 250 g force on the wheel. An optimum rotational speed is disclosed. A one-piece steering wheel formed according to the invention exhibits minimal length ferro-silicon hair-like strands, and thus exhibits reduced brittleness.
REFERENCES:
patent: 4920821 (1990-05-01), Shinto et al.
patent: 5217546 (1993-06-01), Eady et al.
"Metals Handbook, 10th Edition, vol. 2, 1990". ASM International, p. 132, col. 3, Strontium.
Metals Handbook (9th Edition); vol. 15: Casting; ASM International: Metals Park, Ohio; 1988; pp. 300-307.
Dreger Walter H.
Kaufman Michael A.
Koehler Robert R.
M. J. Grootes Investments CC
Simmons David A.
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