Abstract
Materials used in abrasive wear conditions are usually selected according to their microstructure and hardness, however, other factors such as grain size, matrix saturation, carbides size and morphology are rarely considered. Therefore, the present study deals with the influence of different heat and chemical-heat treatments including their combination on abrasive wear resistance of X210Cr12 tool steel. The effects of material hardness, carbide morphology and microstructure on wear resistance after quenching and nitriding were also investigated. One sample series was quenched after austenitization at 960 °C for 20 min and tempered at 180 °C for 2 h. The second sample series was quenched from 1060 °C austenitization for 20 min and afterwards twice tempered at 530 °C for 1 h. From both the quenched and tempered states, one half of the samples was gas nitrided in NH3 atmosphere for 3 h and then diffusion annealed in N2 atmosphere for 4 h. Abrasion wear tests were performed by sliding the samples on Al2O3 paper. The samples weight loss was considered the main criterion for the wear resistance evaluation. The microstructures, nitrided layers and worn surfaces were observed using SEM microscopy. The highest abrasion wear resistance was obtained for the nitrided samples that were previously quenched from 1060 °C and tempered at 530 °C.
Highlights
One of the most common failures of mechanical parts is caused by abrasive wear
If a material has to be used in abrasive wear conditions, the additional factors such as grain size, chemical composition, matrix saturation, carbide size and morphology, particle pressure and abrasion particle size have to be taken into account besides the microstructure type and hardness
This steel is designed for cold working but it can be treated to achieve secondary hardness when it is quenched from the temperatures ranging between 1040 ◦ C and 1100 ◦ C and subsequently tempered in the range from temperatures ranging between 1040 °C and 1100 °C and subsequently tempered in the range from
Summary
One of the most common failures of mechanical parts is caused by abrasive wear. Abrasive wear occurs in conditions at which the working tool surfaces get in contact with hard materials such as sand, rocks, ceramic powders or small metallic particles created from worn surfaces by contact fatigue loading. The general criterion for abrasive wear is usually related to the hardness of the material. This rule is valid only for the materials of the same material group [1]. Research findings in the field of tool steels processing indicate that material wear decrease can be achieved by increasing the martensite volume fraction and its hardness [2]. If a material has to be used in abrasive wear conditions, the additional factors such as grain size, chemical composition, matrix saturation, carbide size and morphology, particle pressure and abrasion particle size have to be taken into account besides the microstructure type and hardness
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.