Analysis of the influence of heat treatment of NC11LV steel on the durability and improvement of tools for ceramic roof tile strand forming by extrusion
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1
Wroclaw University of Science and Technology
2
Röben Polska Sp. z o.o. i Wspólnicy Sp. K.
3
AGH University of Science and Technology
These authors had equal contribution to this work
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ABSTRACT
This study presents the results of comprehensive research on the analysis of tool operation in the extrusion process of clay mass used for ceramic roof tile production. The aim of the research is to identify the key factors influencing tool wear and to indicate effective methods for increasing operational durability. The research showed that parameters such as pressure and temperature of the ceramic mass flow, containing hard mineral components, significantly influence the intensity of tool wear. The composition analysis of the ceramic mass indicated the presence of high-hardness fractions, including quartz, basalt, and albite. The occurrence of these components leads to accelerated abrasive wear of the tool working surfaces, creating a challenge for the efficiency and cost of the production process. The study included a comparison of several heat treatment variants of NC11LV tool steel. This enabled the selection of appropriate heat treatment parameters and the achievement of favorable mechanical properties, combining high hardness with resistance to brittle fracture and abrasion. These results were confirmed through both laboratory abrasive wear tests and operational conditions. For a more in-depth analysis of the process, advanced numerical modeling methods were applied. Particularly effective was the Smoothed Particle Hydrodynamics (SPH) method, which allowed for accurate representation of complex flow phenomena of ceramic mass containing hard inclusions. The method enabled precise prediction of local stresses, flow paths, and tool wear intensity.