Wear resistance and mechanisms of composite hardfacings at abrasive impact erosion wear

6th International Conference on Fracture Fatigue and Wear

Surzhenkov, A.^1 ; Viljus, M.^1 ; Simson, T.^1 ; Tarbe, R.^1 ; Saarna, M.^1 ; Casesnoves, F.^1

Department of Mechanical and Industrial Engineering, Tallinn University of Technology, Ehitajate tee 5, Tallinn

19086, Estonia^1

关键词: Impact erosion;    Impact velocities;    Impact wear;    Powder metallurgy technologies;    Wear condition;    Wear mechanisms;    Wear prediction;    Wear resistant;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/843/1/012060/pdf
DOI  :  10.1088/1742-6596/843/1/012060

来源: IOP

【 摘 要 】

Tungsten carbide based hardmetal containing sprayed and melted composite hardfacings are prospective for protection against abrasive wear. For selection of abrasive wear resistant hardfacings under intensive impact wear conditions, both mechanical properties (hardness, fracture toughness, etc.) and abrasive wear conditions (type of abrasive, impact velocity, etc.) should be considered. This study focuses on the wear (wear rate and mechanisms) of thick metal-matrix composite hardfacings with hardmetal (WC-Co) reinforcement produced by powder metallurgy technology. The influence of the hardmetal reinforcement type on the wear resistance at different abrasive impact erosion wear (AIEW) conditions was studied. An optimal reinforcement for various wear conditions is described. Based on wear mechanism studies, a mathematical model for wear prediction was drafted.