Wear behaviour of TiC coated AISI 4340 steel produced by TIG surface melting
Coating possesses superior wear resistance which makes the material suitable for components subjected to dynamic applications under sever wearing condition and high temperature applications. In this study, TiC coating layer was synthesized by preplacing a 1 mg/mm2 of fine size (~40 μm) TiC powder...
| Main Authors: | , , , , |
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| Format: | Conference or Workshop Item |
| Language: | English English |
| Published: |
Trans Tech Publications
2015
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/42872/ http://irep.iium.edu.my/42872/ http://irep.iium.edu.my/42872/1/P88_2015_Belal.pdf http://irep.iium.edu.my/42872/4/42872_wear_behaviour_Scopus.pdf |
| Summary: | Coating possesses superior wear resistance which makes the material suitable for
components subjected to dynamic applications under sever wearing condition and high temperature
applications. In this study, TiC coating layer was synthesized by preplacing a 1 mg/mm2 of fine size
(~40 μm) TiC powder on the surface of AISI 4340 steel. The composite layer was produced by
rapidly melting TiC powder together with the substrate steel using tungsten inert gas (TIG) torch
welding at a fixed heat input of 1344 J/mm. The wear behaviour of the coated steel was investigated
using a universal pin-on-disc tribometer. The microhardness profile of the coating showed
increment of the hardness value (almost 5 times higher) than the substrate material. The wear test
results showed that the TiC coated steel has lower wear volume loss hence, higher wear resistance
compared to the substrate AISI 4340 steel. Incorporation of TiC into the steel surface has improved
the wear behaviour of the steel by reduction of plastic deformation and ploughing of the steel
surface. The SEM micrograph of the wear worn surface showed mild type of abrasive wear for
coated steel whereas, the AISI 4340 steel showed severe type wear with excessive plastic
deformation and ploughing. |
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