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. 18, 2014
Filed:
Dec. 19, 2008
Anders Karlsson, Stockholm, SE;
Gunilla Anderson, Sollentuna, SE;
Peter Björkhagen, Skarpnäck, SE;
Per Gustafson, Huddinge, SE;
Marco Zwinkels, Sundbyberg, SE;
Anders Karlsson, Stockholm, SE;
Gunilla Anderson, Sollentuna, SE;
Peter Björkhagen, Skarpnäck, SE;
Per Gustafson, Huddinge, SE;
Marco Zwinkels, Sundbyberg, SE;
Sandvik Intellectual Property AB, Sandviken, SE;
Abstract
The present invention relates to a method of making cutting tools comprising a substrate having a hard phase and a binder phase, the method comprising forming green powder compacts using powder metallurgical techniques, charging the green powder compacts, placed on one or several trays, in a furnace and sintering the green powder compacts wherein the furnace comprises an insulation package, at least three individually controlled heating elements located inside the insulation package including a vertical heating element, an upper horizontal heating element arranged in an upper part of the furnace, and a lower horizontal heating element arranged in a lower part of the furnace, wherein operating the at least three heating elements such that an average controlled cooling rate from a sintering temperature down to at least a solidification temperature of the binder phase is 0.1-4.0° C./min, and a sintering furnace operable to obtain a controlled cooling rate.