Received 29 October 2019; received in revised form 6 December 2019; accepted 25 January 2020. To cite this article: Aznam et al. (2020). The effect of TiAlN-based and AlCr-based coatings towards mechanical properties on punch tools using finite element method. Jurnal Tribologi 24, pp.65-79. The effect of TiAlN-based and AlCrN-based coatings towards mechanical properties on punch tools using finite element method

The effect of TiAlN-based and AlCrN-based coatings towards mechanical properties on punch tools using finite element method

In this paper, a combined FE simulation and scratch experiments approach was used to simulate the contact established between a high-speed steel (HSS) work roll and a hot strip material in hot rolling, in which the top layer and the substrate represented the HSS roll and the tip of the indenter represented a particle from oxide scale formed on the strip steel. This work focused on the contact behaviour of the oxide scale in the roll bite during hot rolling. The coefficient of friction during the simulation tests was recorded. It was found that the evolution of the coefficient of friction could be divided into two stages which are incubation period and stationary period. Associated with the evolution of the coefficient of friction, the deformation behaviour and the displacement at the cross section were characterised to study the tribological behaviour of oxide scale in contacts. The results indicated that the deformation and wear mechanism of oxide layer surface vary in different depths of penetration. At the penetration depth 2 μm, the oxide scale on the pin surface is significantly deformed. At the stage 3.2 μm and 4 μm, which the coefficient of friction is stable, the maximum von Mises are significantly higher than the yield stress of the oxide layer (σy = 7 GPa) so that high plastic deformation occurs.

Siti Fatimah Hassan

Papers

A simulation of friction behavior on oxidised high speed steel (HSS) work rolls

Influence of bi-layer structure and sub-layer distance on the hardness of multilayer thin film TiAlN and CrN