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:
Apr. 12, 2011
Filed:
Jan. 29, 2008
Sakari Ruppi, Fagersta, SE;
Sakari Ruppi, Fagersta, SE;
Seco Tools AB, Fagersta, SE;
Abstract
The present invention relates to a coated cutting tool insert and a texture-hardened α-AlOlayer to be used in metal machining. The alumina layer is characterized by the improved toughness and it adheres to the substrate covering all functional parts thereof. The coating is composed of one or more refractory layers of which at least one layer is a texture-hardened α-AlOhaving a thickness ranging from 2 to 20 μm being composed of columnar grains with a length/width ratio of 2 to 12. The α-AlOexhibits a strong (0006) diffraction peak. The improved wear resistance and toughness can be obtained when the texture coefficient (TC) for the (0006) reflection is larger than 1.33 ln h+2, where h is the α-AlOlayer thickness and when the surface of the α-AlOlayer is wet-blasted to an R-value <1 μm. The alumina layer with a strong (0001) texture is applied on Binder phase enriched cemented carbide substrates. This combination contributes to enhanced wear resistance and toughness.