Abstract:
This research aimed to create and analyze surface coatings using Diamond-Like Carbon (DLC) on materials for coating carbide cutting tools used in machining stainless steel, with three different levels of bias voltage: Low, Normal, and High. The structural analysis, mechanical properties, tribological properties, and corrosion resistance were studied. It was found that coating the surface with
High DLC exhibited the highest hardness, with a modulus of elasticity of 36 GPa and a flexural modulus of 333 GPa. It also demonstrated complete resistance to delamination with a critical load (Lc) of 37.87 mN. DLC Normal had a hardness value of 34.2, followed by DLC Low with a hardness value of 31.8. The improvement in bias voltage was shown to increase the hardness. Tribometer testing revealed that
DLC Normal exhibited excellent anti-scratch resistance with a minimum scratch resistance rate of 4.5 x 10-7 mm/Nm and a low coefficient of friction (COF) of 0.0632. The potentiostat test demonstrated excellent corrosion protection in DLC Normal, showing the lowest corrosion current density, resulting in the highest corrosion protection efficiency of 96.91%.