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:
Jul. 27, 1993
Filed:
Apr. 07, 1992
Nils G Brandt, Solna, SE;
Sandvik AB, Sandviken, SE;
Abstract
The present invention relates to a ceramic whisker-containing cutting insert for chipforming machining of steel having improved mechanical, thermal and wearing properties. Besides an oxide-based matrix, the material contains 5-50, preferably 10-40, % by volume of homogeneously distributed whiskers or platelets of nitrides, carbides and/or borides of metals from group IVB (Ti, Zr or Hf) and/or VB (V, Nb or Ta) in the periodic system (or solid solutions thereof) having a linear expansion coefficient being lower than that of Al.sub.2 O.sub.3, preferably at the most 85% of that for Al.sub.2 O.sub.3 measured at 300-1300K. The properties of the composite material can be further modified by coating the whisker material with thin layers. The whisker reinforced cutting tool material shows an improved toughness behavior.