Experimental and Numerical Analysis of Heat Transfer in CVD Coated Carbide Tools

Quantitative assessment of the thermal role and wear characteristics of multi-layer coatings in cutting
tools is approached through the analysis of mechanical contact problem at the tool-chip interface and
the constriction resistance phenomenon. The micro-contact configuration on the surface asperity level
and the macro-contact configuration (contact pressure distribution and the size of the adhesion and
sliding zones) are to be analyzed. The dependence of the workpiece rotational speed and size on the
convective-radiant coefficient of heat transfer is to be determined. Using FE simulation, the correlation
between the contact pressure and the thermal contact resistance of uncoated and multi-layer coated
tools are to be established and validated. The effects of the composition of the coating material (a.A120
3, Ti(C,N», as well as its thickness, texture, crystal orientation and coating architecture are to be
investigated. The thermal interaction and heat redistribution in the workpiece-chip-tool system is also
to be examined.

Faculty Supervisor:

Helmi Attia

Student:

Partner:

SECO Tools Canada Inc.

Discipline:

Engineering

Sector:

Environmental Science and Technology

University:

McGill University

Program: