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:
Nov. 09, 1999
Filed:
Oct. 09, 1997
Applicant:
Inventor:
Bjorn Ljungberg, Enskede, SE;
Assignee:
Sandvik AB, Sandviken, SE;
Primary Examiner:
Int. Cl.
CPC ...
C23C / ;
U.S. Cl.
CPC ...
42725519 ; 42725521 ; 42725528 ;
Abstract
A body with a coating comprising one or more refractory layers of which at least one layer is a layer of .alpha.-Al.sub.2 O.sub.3 textured in the (110) direction is disclosed. Said alumina layer which is essentially free of cooling cracks, comprises platelike grains with a length of 2-8 .mu.m and a length/width ratio of 1-10, preferably 3-7. The coated tools according to the presently claimed invention show improved tool lives compared to prior art tools when used for machining steel or cast iron material.