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:
May. 07, 2002
Filed:
Jan. 26, 2001
Dirk Rode, Osnabrück, DE;
Hans-Jürgen Hemschemeier, Ibbenbüren, DE;
Ralf Rethmann, Georgsmarienhütte, DE;
KM Europa Metal AG, Osnabruck, DE;
Abstract
A casting-die body ( ) made of a hardenable copper alloy is provided with an inner wear-protective layer ( ) of chromium whose hardness decreases from the billet-side surface ( ) in the direction of the casting-die body ( ). The wear-protective layer ( ) is made up of two chromium layers ( ). For this purpose, the casting-die body ( ) is given a solution heat treatment, is chromium plated, and is then hardened, as a result of which the initially very great hardness of the chromium layer ( ) is reduced. The hardness of the chromium layer ( ) then is about 650 HV. Subsequently, to increase the wear protection, the second chromium layer ( ) is applied. The result is a conventional chromium-plated layer having a hardness of between 850 HV and 1050 HV.