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Investigation of the Erosive Wear Resistance of Boronized Ash-Blowing Nozzles

100%
Calik A., Ozbakir O., Karakas S., Ucar N.
Acta Physica Polonica A
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2017
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vol. 131
|
issue 2
252-254
EN
In this study, pack boronizing was applied to ash-blowing nozzles manufactured from AISI 1040 steels using Ekabor II powders as the boronizing source at a temperature of 1273 K for a duration of 8 h. Erosive wear tests of boride ash-blowing nozzles were carried out in ash delivery line of thermal reactor under actual working conditions. It was observed that erosive wear resistance of borided ash-blowing nozzles were increased 3 times as a result of the boronizing process. The improved wear resistance of the borided samples can be explained by increased surface hardness and higher work hardening.
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Comparison of Hardness and Wear Behaviour οf Boronized and Carburized AISI 8620 Steels

88%
Calik A., Duzgun A., Ekinci A., Karakas S., Ucar N.
Acta Physica Polonica A
|
2009
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vol. 116
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issue 6
1029-1032
EN
In this study, the hardness and wear behaviour of carburized and boronized AISI 8620 steels have been studied. The boronizing treatment increased the hardness of AISI 8620 steels from 395 HV_{0.1} to a maximal 1610 HV_{0.1} compared to the carburized steels and also significantly improved its wear behaviour. From obtained results, it can be concluded that boronizing is very effective surface hardening method for improving the wear properties of AISI 8620 steels.
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Diffusion Kinetics of Binary Ti-Ni Shape Memory Alloys

88%
Ucar N., Dogan S., Ozdemir A., Karakas S., Calik A.
Acta Physica Polonica A
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2017
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vol. 132
|
issue 3
524-526
EN
In this work, the boriding of binary Ti-Ni shape memory alloys was carried out in a solid medium at 1173 and 1273 K for 2, 4, and 8 h using the powder pack method with Ekabor-Ni powders. The boride layer was characterized by optical microscopy and scanning electron microscopy. The obtained results show that boride layer thickness increases with the increasing boriding temperature and time. Depending on temperature and boride layer thickness, the diffusion process is thermally activated, with the mean value of the activation energy being close to 67 kJ/mol.
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