The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 06, 1983
Filed:
Nov. 16, 1981
Tadao Ito, Fuji, JP;
Akio Hashimoto, Numazu, JP;
Nippon Light Metal Company Limited, Tokyo, JP;
Abstract
A cast article of aluminum alloy is produced by pouring into a mold a molten Al-Si-Cu type or Al-Si-Cu-mg type casting alloy having an antimony (Sb) content in the range of about 0.03%-1.0% by weight and, while the alloy cast body is cooling following complete solidification but before its temperature has fallen below 450.degree. C., placing the solidified cast body into a heating furnace kept at temperatures in the range of from 480.degree. to 530.degree. C. and retaining it at an intermediately high-temperature within that temperature range for not more than two hours, subsequently quenching said cast body in cold water or hot water and thereafter subjecting the quenched cast body to a treatment for artificial aging at temperatures in the range of from 140.degree. to 230.degree. C. for a period in the range of from one to 12 hours. The resulting cast articles are, in terms of strength, toughness and resistance to thermal shocks, comparable with or superior to cast articles obtained by conventional methods but can be manufactured in a reduced period of time with consequential savings in cost.