The Influence of Rotating Direction on the Tribological Behavior of Grey Cast Iron with Curve Distributed Pit Textured Surface

Abstract

To investigate the influence of surface features, in the form of pits, on the wear resistance of grey cast iron (GCI), a finite element model of the pin-on-disc friction system, with pits distributed in a curved radial direction, was developed using APDL programming and the tribological behavior of textured surfaces was studied. The influence of relative rotation direction between the disc and the pin on the thermal behavior of the friction system under dry wear conditions was researched. GCI and C30E steel samples with pit textured surfaces were manufactured using laser marking equipment and tested using a tribology wear testing rig. The mass losses were measured and the worn surfaces were characterized. The influence of different rotation directions on the tribological behavior of the pit textured surfaces was also investigated. The simulation and test results revealed that rotation direction was a crucial parameter in determining the tribological behavior of surfaces with these features, regardless of the material. Under the conditions tested, when the pin rotated anticlockwise, the samples showed better friction and wear behavior than when the pin rotated clockwise. These results can provide important guidance for the optimization of the design of heavy-load brake systems and other similar applications.

The Influence of Pits on the Tribological Behavior of Grey Cast Iron under Dry Sliding

“…Correspondingly, the friction coefficient and wear volume also decreased with the change of DOP from 0.4 mm to 0.8 mm. In general, the parameters of S01 are the best among all samples, i.e., DOP of 0.8 mm, and DBP of 1.0 mm, which are consistent with the results published previously [15,16].…”

“…For certain conditions, the heat conduction during friction processes can be described by the classical heat conduction equation. In the Cartesian coordinate system, the classical heat conduction equation can be expressed as follows [16]:…”

“…In contrast, studies of the antiwear performance or tribological behavior of GCI parts with textured surfaces are quite few, whether in experiment or simulation, especially under dry wear conditions. Based on the previous research on the thermal behavior of pin-on-disc friction systems [15,16], a finite element model with linearly distributed pits in the radial direction (LDRD) was first established through APDL (ANSYS parametric design language) programming. The influence of different pit parameters on the tribological behavior was researched.…”

Wear behavior of pits textured grey cast iron rings with Zr/ZrN coatings under dry sliding

“…However, due to the buffering and separation of debris during the wear process, S02 and S03 have much lower wear losses than S01. The increase of DBP can significantly enlarge the heat-affected zone and high thermal stress region of the textured surface, 31,32 which is detrimental to obtaining good anti-wear performance. Also, a high DBP is disadvantageous to the collection of debris during dry sliding wear, and then further deteriorate the wear resistance of pits textured surfaces.…”

“…[19][20][21][22] However, the influence and its mechanism of texture patterns on the anti-wear performance or tribological behavior of GCI parts under dry sliding are still unclear, especially when the surface texturing combines with Zr/ZrN composite coatings. [23][24][25][26][27][28][29][30] Therefore, based on previous publications on the wear performance of pits textured GCI parts, 31,32 the same GCI ring model with linearly distributed pits in the radial direction (LDRD) was introduced in this work. The pits texture GCI rings with Zr/ZrN coatings were prepared sequentially by laser marking system and PVD equipment.…”