Speaker
Description
Variation in lifetime of used coated cemented carbide tools in cutting applications are evident, even when using the same machine, same cooling conditions as well as the same steel material.
The common steel classification only defines the chemical composition of the steel grades, but the frequency and size of non-metallic inclusions is not clearly determined.
This study examines this factor for the apparent wear damage mechanisms and end of lifetime reached in a longitudinal turning application of a hot work steel X37CrMoV5-1.
The investigated turning inserts were based on WC-7wt.% Co coated with a TiN-TiCN-Al2O3 based CVD film.
To focus on the influence of the non-metallic inclusions, the hot work steel X37CrMoV5-1 from four different steel suppliers were tested with varying cutting parameters.
The chemical composition of the inclusions and their frequency were investigated using a scanning electron microscope. The obvious damage mechanisms on the turning inserts were documented with a digital microscope.
The chemical composition, a high number and the size of the inclusions significantly influence the end of lifetime of the turning inserts.
| Speaker Country | German |
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