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. 28, 1976
Filed:
Jul. 09, 1975
Abstract
A wear-resistant hard metal body is provided including a core of a hard metal body and a surface coating of a hard material on the core. The core of hard metal body includes at least one of the binder metals iron, cobalt and nickel and at least one of the carbides of the elements titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum and tungsten. The surface coating of hard material contains at least one carbide, nitride, boride and/or oxide. The binder metal contained in the core of hard metal body is also contained in the surface coating of the hard material and originates from the core of hard metal body. A method is provided for producing such wear-resistant hard metal bodies by subjecting a hard metal body comprising a core of hard metal body and a hard surface coating on the core to a pressure of between about 10.sup.-.sup.5 Torr and about 10 bar and a temperature between about 900.degree. and about 1600.degree. C for a period of time between about one minute and about 8 hours to diffuse binder metal from the core into the surface coating.