Surface finishing for metal moldings
AssigneeAsahi Tec Corporation
InventorsShigesaburo Asai, Tetsuya Sakagami
Life of this patent
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Abstract
A vehicle wheel having a polished design surface coated with a transparent coating which is mainly composed of inorganic material. The surface roughness should be 3 .mu.m or less in centerline mean surface roughness, and have a mean value of dendrite secondary arm spacing less than or equal to 40 .mu.m.
Claims3
An aluminum alloy article which is to be provided with a mirror-finish, characterized in that a mean value of dendrite secondary arm spacing in a surface region of said article is not greater than about 40 .mu.m.
A cast vehicle wheel having a rim portion and a disc portion formed integrally with said rim portion, said cast vehicle wheel comprising an aluminum alloy containing silicon, characterized in that a surface roughness of a design surface of said cast vehicle wheel is less than or equal to about 3 .mu.m in centerline mean surface roughness, and wherein a mean value of dendrite secondary arm spacing in a surface region of said cast vehicle wheel is less than or equal to about 40 .mu.m.
Dependencies are inferred from the claim text.