Abrasive wear resistance of recycled hardmetal reinforced thick coatings
The aim of the current study was to compare abrasive wear resistance of thick coatings deposited with different hardfacing technologies. To produce metal matrix composite (MMC) coatings commercial iron and nickel based powders with recycled hardmetal content of 40 vol.％ were studied. For deposition technologies plasma transferred arc (PTA) welding and high-velocity oxy-fuel (HVOF) spraying were used.The microstructure of produced thick coatings was examined, including the distribution of hard phase and homogeneity of metal matrix. Micromechanical properties, including hardness and elastic modulus of features were measured by universal hardness measurements. Furthermore, behavior of coatings subjected to abrasion, erosion and impact wear was studied. Results indicate that the choice of matrix for the same reinforcements can also be an important factor for combating abrasive wear. Fe-based thick coatings produced by PTA are more wear resistant compared to the Ni-based ones.Wear resistance of experimental PTA hardfacings at abrasion and impact wear tests notably exceeds that of HVOF sprayed coatings. Wear mechanism dominating at abrasive wear in most cases is the removal of metal matrix due to lower hardness. Assignment of hardmetal waste as initial material can significantly decrease the cost of production, improve the mechanical characteristics of coatings and consequently increase their wear resistance.
coatings recycled hardmetal abrasive wear abrasion erosion impact wear
Priit Kulu Riho Tarbe Arkadi Zikin Heikki Sarjas Andrei Surzenkov
Tallinn University of Technology, Department of Materials Engineering Tallinn 19086, Ehitajate tee 5 Austrian Centre of Competence for Tribology (AC2T) Research GmbH, Victor-Kaplan-Straβe 2, 2700, Wien
国际会议
北京
英文
541-546
2012-10-23（万方平台首次上网日期，不代表论文的发表时间）