Aluminum cylinder head valve seat coating transplant

Details Aluminum cylinder head valve seat coating transplant Aluminum cylinder head valve seat coating transplant

1976-05-05

1977-06-07

Rutledge, L. Dewayne

Stock material or miscellaneous articles

All metal or with adjacent metals

Having metal particles

428553, 428654, 428926, 428687, B32B 1520

Patent

active

040280624

ABSTRACT:
A method of making aluminum castings having a self-fused high silicon content in the interior matrix near and at the surface. A sand core is coated with a tacky, low-ash, low-volatile adhesive along a predetermined zone. Silicon dust particles are deposited on said adhesive in bonded relation. Molten aluminum is cast into a mold cavity containing the coated core. After mold stripping, the silicon particles are exposed as metallurgically bonded to the aluminum but along an ultra-thin depth. At least some of the exposed silicon particles are machined to expose a planar facet and thereby increase the projected exposure of the silicon particles along the machined plane. The resulting product has a reduced shrinkage characteristic (typical of aluminum alloys having a high proportional precipitated silicon).

REFERENCES:
patent: 2312039 (1943-02-01), Hoglund

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