UNDERSTANDING THE MECHANISMS OF CRATER WEAR

摘要

Cutting temperature is known to play an important role in the generation of tool wear. However, the literature is typically lacking in the tool wear studies that bring together the temperature fields and the wear mechanisms. The major portion of this paper adopts a dual approach to the problem by experimentally quantifying cutting temperatures and semi-analytically modeling tool wear. The rest of the paper is to address the underlying physics behind the crater wear to justify the abrasive and chemical dissolution models used to explain the crater wear. This paper presents the results of our experimental studies to understand the wear mechanisms involved in the development of crater on the rake face of a cutting tool. We have conducted the machining experiments on various coated inserts as well as uncoated inserts. The resulting interfaces have been carefully studied to shed light on the physics behind the crater wear and the reasoning behind the development of crater wear, typically observed in turning plain carbon steels.