Effect of abrasive particle size on friction and wear behaviour of various microstructures of 25CD4 steel

6th International Conference on Fracture Fatigue and Wear

Trevisiol, C.^1 ; Jourani, A.^1 ; Bouvier, S.^1

Sorbonne Universités, Université de Technologie de Compiègne, CNRS, UMR 7337 Roberval, Centre de Recherché Royallieu, CS 60 319, Compiègne Cedex

60 203, France^1

关键词: Abrasive particle size;    Chemical compositions;    Dual phase microstructure;    Friction and wear behaviours;    Friction coefficients;    Martensite volume fraction;    Martensitic microstructure;    Single phase microstructure;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/843/1/012073/pdf
DOI  :  10.1088/1742-6596/843/1/012073

来源: IOP

【 摘 要 】

Many parameters, such as normal load and material bulk hardness, control the wear and friction behaviours of materials. Nonetheless, the investigation of the coupled contributions of microstructure and abrasive particle size are still lacking. A contribution is proposed by using steel pins with various microstructures with a similar macro-hardness (around 410HV) and chemical composition. A quenched martensitic microstructure, a tempered martensitic microstructure and three ferrite-martensite dual-phase microstructures, with a similar martensite volume fraction (around 67%) and different martensite colony morphologies, are established. Friction tests are performed between these pins and abrasive papers with different sizes ranging from 15μm to 200μm. Compared to single-phase microstructures (quenched and tempered martensitic microstructures) and whatever the abrasive particle size, ferrite-martensite dual-phase microstructures reduce the friction coefficient and provide better wear resistance. For the ferrite-martensite dual-phase microstructures and unlike fine and fibrous martensite colonies, coarse and granular martensite colonies minimize the friction coefficient. In addition, characterized by a change of wear mechanisms between abrasion and adhesion, an intermediate abrasive particle around 35 μm minimizes the friction coefficient. This study also reveals that the wear rate increases with the abrasive particle size which is associated to an increase of the attack angle of abrasive grains.