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:
Mar. 07, 1978
Filed:
Apr. 10, 1975
Yasushi Ohuchi, Katsuta, JA;
Takeo Tamamura, Hitachi, JA;
Naotatsu Asahi, Hitachi, JA;
Makoto Nakayama, Hitachi, JA;
Hisanobu Kanamaru, Katsuta, JA;
Arinobu Hamada, Yokohama, JA;
Yasuhiro Takahashi, Yokohama, JA;
Kozo Tabata, Mitaka, JA;
Ryota Mitamura, Yokohama, JA;
Hitachi, Ltd., BOTH OF, JA;
Showa Denko K.K., both of, JA;
Abstract
An aluminum alloy consisting essentially of 8 to 15% by weight of silicon, 0.05 to 0.7% by weight of magnesium, 1 to 4.5% by weight of copper, the balance being aluminum, wherein a silicon crystal in eutectic structure crystallized out in an aluminum matrix has a mean grain size not larger than 5 microns and intermetallic compounds of magnesium and copper are finely precipitated in the matrix as age-hardening elements for the matrix, and the alloy has at least 40 kg/mm.sup.2 tensile strength and at least 10% elongation, good antiwearing and excellent workability. The disclosure is also concerned with a method of making the above-mentioned aluminum alloy.