2 research outputs found
Dry sliding wear behavior of bonded hot-work tool steel at elevated temperatures
In the present study, the surface of AISI H13 hot-work tool steel was
bonded with EKabor II powders using powder pack-bonding method. The
process was carried out at 800,900 and 1000 degrees C temperatures for
2,4 and 6 h periods. The wear tests were carried out using a ball-on
disc tribometer at room temperature and 500 degrees C on bonded and
untreated AISI H13 hot-work tool steel. Scanning electron microscope
(SEM), optical microscope, 3D profilometer, X-ray diffraction analysis
and micro-hardness tester were used in the evaluation of micro-structure
and wear data. The increase in the bonding temperature and bonding
period led to increased thickness and hardness of the boride layer.
Bonding at 800 degrees C resulted with formation of Fe2B, Mn2B, Cr5B3,
phases, while FeB, Fe2B, Mn2B, and Cr5B3 boride phases occurred at 900
and 1000 degrees C. Dominant wear mechanisms were microcrack-induced
plastic deformation during high temperature wear tests; oxidation and
microcrack formation during room temperature wear tests; and oxidation
and severe plastic deformation for the untreated specimen. (C) 2017
Elsevier By. All rights reserved