Tool with a molybdenum sulfide containing coating and method for its production
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United States of America Patent
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Mar 4, 2003
Grant Date -
N/A
app pub date -
Jul 25, 2001
filing date -
Mar 3, 1999
priority date (Note) -
Expired
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Abstract
The invention relates to a tool, especially a cutting insert for cutting metallic materials, which consist of a hard metal, cermet ceramics or steel base, especially of a high speed steel base, and at least one layer deposited thereon. The single layer, or in the case of several layers the outer layer or the layer underneath the outer layer, contains molybdenum sulfide. The aim of the invention is to improve the resistance to wear of the friction-reducing, molybdenum sulfide containing layer even at high pressures. To this end, the molybdenum sulfide containing layer consists of an alternating sequence of two layer that are different from one another. The first layer contains 51 to 100% by weight of metallic molybdenum and the second layer contains 21 to 100% by weight of MoS.sub.2 which substantially consists of hexagonal crystals that are at least substantially oriented in a plane parallel to the tool surface.
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