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:
Aug. 19, 1997
Filed:
Dec. 29, 1995
Applicant:
Inventors:
Norbert Gaag, Lauf, DE;
Peter Ruchel, Lauf, DE;
Assignee:
Diehl GmbH & Co., Nurnberg, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C / ;
U.S. Cl.
CPC ...
148434 ; 148413 ; 148419 ; 148435 ; 148436 ; 148441 ; 148442 ; 420477 ; 420478 ; 420480 ; 420481 ; 420485 ; 420486 ; 420515 ; 420521 ; 420587 ;
Abstract
A copper-zinc alloy for semi-finished products and articles which are highly loaded and subjected to extreme wear especially synchronizing rings. The alloy possesses a composition of 40 to 65% Cu, 8 to 25% Ni, 2.5 to 5% Si, 0 to 3% Al, 0 to 3% Fe, 0 to 2% Mn and 0 to 2% Pb, with the balance being zinc and unavoidable impurities. The Ni:Si ratio is about 3 to 5:1, and the structure consists of at least 75% .beta.-phase, with the balance .alpha.-phase, in the absence of a .gamma.-phase. Nickel silicides occur predominantly as a round intermetallic phase. The alloy provides quite substantially higher levels of resistance to wear.